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Marconi Wireless Telegraph Company of America engineering drawings
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Marconi Wireless Telegraph Company of America engineering drawings

Accession 2464.83

Manuscripts and Archives Department, Hagley Museum and Library


PO Box 3630
Wilmington, Delaware, 19807
302-658-2400
askhagley@hagley.org

Finding aid prepared by Anastasia Day, 2016.,

This finding aid was produced using the Archivists' Toolkit 2017-01-10T08:45-0500

Finding aid prepared using best local practices and Describing Archives: A Content Standard

The collection was processed with support from the Council on Library and Information Resources (CLIR) Cataloging Hidden Special Collections and Archives grant.

Cite items for this collection in the following format:
[Description and dates], Box/folder number, Marconi Wireless Telegraph Company of America engineering drawings (Accession 2464.83), Hagley Museum and Library, Wilmington, DE 19807

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Descriptive Summary

Title: Marconi Wireless Telegraph Company of America engineering drawings
Dates: 1905-1921
Accession Number: 2464.83
Creator: Marconi Wireless Telegraph Company of America.
Extent: 8 linear feet
Language of Material: English
Repository: Hagley Museum and Library: Manuscripts and Archives Department
Abstract: The Marconi Wireless Telegraph Corporation of America was founded in 1899 as the American branch of Guglielmo Marconi’s Wireless Telegraph & Signal Company of London. Because of its emphasis on providing radio transmitter receivers for ships and fostering oceanic communications, the U.S. Navy commandeered the company during World War I. After the war, both government and industry colluded to buy out the British company; they created the Radio Corporation of America in its stead in 1919. This collection includes around 1,300 engineering and technical drawings from the Marconi Wireless Telegraph Company of America . Subjects depicted range from circuit diagrams, wiring layouts, and switchboard schematics to architectural plans for aerial towers and carrying case designs.
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Administrative Information


Provenance

George Howard Clark (1881-1856), wireless engineer and then historian at the Radio Corporation of America began collecting what he referred to as ‘Radioana,’ materials related to wireless technology in all forms, at a young age. Hired by RCA at its inception in 1919, he moved into a historian’s role in 1928, and began collecting full-time. Clark retired from RCA in 1946, at which point the Marconi drawings he had accumulated were shipped to RCA’s transoceanic station at New Brunswick, New Jersey. Ironically, this site was originally constructed for the Marconi Wireless Telegraph Company in 1913, and many of the drawings were generated there. The station closed in 1957, a year after the death of George Clark. The drawings now held at Hagley were purchased from the next owner of the property (then serving as a senior living facility; now a strip mall) by an antique dealer, Edmund Brodkin of Somerset, New Jersey. In 1974, Brodkin advertised a group of about 1300 drawings for sale to a number of institutions. The Smithsonian, being interested but unable to afford such a purchase, contacted RCA. In 1975, RCA purchased the 1300 drawings from Brodkin on behalf of the David Sarnoff Library. After the library closed in 2009, the Marconi drawings migrated intact with the rest of the archival material to Hagley.

Access Restrictions

Drawings without a box and folder number are currently undergoing conservation treatment and are unavailable to researchers.

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Historical Note

Guglielmo Marconi, ‘father of radio,’ was born in Bologna, Italy in 1874. In 1894 at the age of twenty, he created the first radio transmitter and receiver. Stymied by dismissal and disbelief of his work in Italy, Marconi traveled to Britain in 1896. There, several demonstrations of his wireless technology across Salisbury Plain fostered both momentum and investment capital. In 1897, Marconi founded the Wireless Telegraph & Signal Company in London, shortly after receiving a British patent for his wireless technology. Expanding quickly overseas, the Marconi Wireless Telegraph Company of America (MWTCA) was chartered by the state of New Jersey in 1899. The company’s early priority was to create wireless capabilities for ships at sea to communicate with each other and with the shore – it was this campaign which led to a Marconi wireless transmitter aboard the Titanic in 1912, which contacted the Carpathia to rescue survivors of the capsizing ship. David Sarnoff (1891-1971), future RCA executive, began his career in electronics working for the Marconi Wireless Telegraph Company of America in 1906 at the age of 15.

During World War I, the U.S. Navy seized control of almost all MWTCA assets for transmitting and receiving, leaving only their manufacturing capabilities outside wartime control. In the aftermath of World War I, when the Navy relinquished control of MWTCA, the importance of wireless technology was abundantly clear. However, the United States realized they had no domestic wireless corporations; the controlling stock in MWTCA was British. Seeking to safeguard America’s ability to communicate wirelessly and securely with any nation, Admiral William H.G. Bullard contacted Owen D. Young at General Electric and arranged for the creation of an American-controlled company to buy out MWTCA. This new company, The Radio Corporation of America, assumed control of all intellectual, material, and operating rights of the former MWTCA in 1919, and was granted use of crucial G.E. licenses, most important being the Alexanderson alternator.

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Scope and Content

The collection includes over 1300 drawings from the Marconi Wireless Telegraph Company of America mostly produced from 1917 to 1919. Geographically, the vast majority seem to have been produced at MWTCA facilities in New York and New Jersey. However, the projects and equipment were meant for locations not only within the United States, but outside it as well, including Cuba, Argentina, Brazil, and the Philippines.

The Marconi drawings range in subject from circuit diagrams, wiring layouts, and switchboard schematics to architectural plans for aerial towers and carrying case designs. Especially noteworthy are the contract work designs where the buyer is identified. Over a hundred drawings are related to U.S. Navy projects, and over fifty are related to Army projects. There is an early airplane radio with a propeller generator designed to attach to the wing of the plane, a mule-pack radio set for the Army Signal Corps complete with leather saddle schematics, a blimp radio installation guide, and various equipment for boats of both marine and flying varieties. General Electric , Crocker-Wheeler Company, Lowenstein Radio Company, the International Telegraph Construction Company, and Electrose Manufacturing Company all appear in the notes on various documents. More than any other corporation, there are mentions of the United Fruit Company, famous both as propagator of ‘Banana Republics’ and as surprising pioneer in electronic wireless communications across their global empire. Historical curiosities include a diagram of the radio tower for Boston’s Filenes building, a 1912 Beaux Arts colossus designed by Daniel Burnham, and 1913 designs for mast caps at the South Wellfleet station in Massachusetts. That station had relayed the first transatlantic wireless message in 1903.

The drawings contain a wealth of information. The drawings also often contain annotations in pencil - emendations, revisions, notes, or simply the words ‘VOID’ or ‘OBSOLETE’ scrawled across them. Many contain a “Bill of Material” with amounts, and sometimes prices, per unit. They often include references to other drawings: lists of sub assemblies by drawing number, other views of the same item, wiring diagrams, cases, etc. Insofar as practical, those have been included in the ‘Notes’ section of each item’s entry. Sometimes the drawings specify materials, finishes, and even paint or enamel colors. Occasionally, man-hours are noted, especially when multiple people were involved. A 30 hour total time-mark seems standard for many of the drawings that have these notations – this could be a bias in noting time worked only for the most complex drawings, though.

The drawings from the David Sarnoff Library do not represent the full collection of drawings produced by the Marconi Wireless Telegraphy Company of America, nor even all the MWTCA drawings George Clark amassed throughout the 1920s, 30s, and 40s. Nearly 3,800 more drawings bearing catalog numbers from Clark’s Radioana collection (many duplicates of those in the Sarnoff Library) were found in the attic of a building originally part of the Marconi (and then RCA) New Brunswick campus in 1999 – the same plant where those incorporated into the Sarnoff Library were also found. They now reside at InfoAge Science History Learning Center and Museum of Wall, NJ. Judging by catalog numbers, George Clark’s total collection of Marconi drawings was well into the thousands; just filling in the gaps between catalog numbers held by Hagley and InfoAge indicates around 4,600 remain unaccounted for. Since certain catalog numbers repeat with letters appended, for example T 2144567-A, T2144567-B, it is impossible to know with exactitude how many may be missing, even assuming that every series is represented. Furthermore, it is safe to assume that Clark did not near his goal of collecting all the Marconi drawings. Applying the same process to the original MWTCA filing number, indicates around 14,200 are missing, even including those from InfoAge. Nonetheless, there are several stretches where dozens of Marconi consecutive numbers are preserved in order, between gaps of hundreds.

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Arrangement

The drawings are arranged alphabetically by file number assigned by the original collector, George H. Clark. For more information, see File Note.

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Series Descriptions and Inventory

Box Folder
M&A 1275 4 Clark no. M 216 0004 -- Drawing no. 2,028-B: Magnetic detector, 1910 February 18 [Scrap previously glued to paper; both now enclosed in archival paper folder.] ; 10.75 inches x 9 inches
Box Folder
M&A 1275 4 Clark no. M 216 0005 -- Drawing no. 2,083-B: Marine wireless set - 3KW / motor generator control panel, 1909 March 8 [Signal Corps U.S. Army blueprint # 567a-1.] ; 12 inches x 10 inches
Clark no. M 216 0009 -- Drawing no. 2,258-B: Spark plate quenched gap / 1&2 KW, 1912 July 23 [Pencil on tracing paper.] ; 11.5 inches x 9 inches
Box Folder
M&A 1275 4 Clark no. M 216 0010 -- Drawing no. 2,266-B: Proposed plan #1 of comb. / Havana & London trans station, 1912 July 23 [Pencil on tracing paper.] ; 11 inches x 9.5 inches
Box Folder
M&A 1275 4 Clark no. M 216 0014 -- Drawing no. 2,270-B: Terminal insulator & clip for quenched gap. 1& 2 KW, 1912 July 24 [Pencil on tracing paper. Note in pencil: Obsolete see dwg #2,239 E. See print # 2,239G for detail of insulator.] ; 11 inches x 9 inches
Box Folder
M&A 1275 4 Clark no. M 216 0015 -- Drawing no. 2,280-B: Foot for #6 Marconi insulator, 1912 July 31 [Pencil on tracing paper.] ; 11.25 inches x 8.5 inches
Box Folder
M&A 1275 4 Clark no. M 216 0018 -- Drawing no. 2,544-B: Porcelain insulator / No 7A & No 6B, 1912 October 2; 11 inches x 9.5 inches
Box Folder
M&A 1275 4 Clark no. M 216 0019 -- Drawing no. 2,568-B: Porcelain insulator, 1912 October 25 [Pencil on tracing paper.] ; 11.5 inches x 9 inches
Box Folder
M&A 1275 4 Clark no. M 216 0020 -- Drawing no. 2,590-B: Wiring diagram of text buzzer & method of finding wavelength of rec'd signals, 1912 November 12; 11.25 inches x 9.25 inches
Box Folder
M&A 1275 4 Clark no. M 216 0021 -- Drawing no. 2,593-B: Assembly of 2 tr. rack showing method of bolting together using alloy caps for rods, 1906 June 9 [The Electric Storage Battery Co Phila., Pa. Blueprint.] ; 11.25 inches x 8.5 inches
Box Folder
M&A 1275 4 Clark no. M 216 0023 -- Drawing no. 2,617-B: Aerial for Filine B'ld'g, 1912 December 19 [Pencil on tracing paper. NB: Misspelling of "Filene Building," famed Beaux Arts Daniel Burnham designed department store building in Boston, completed 1912.] ; 11.25 inches x 9.25 inches
Box Folder
M&A 1275 4 Clark no. M 216 0026 -- Drawing no. 2,708-B: Porcelain insulators no 10 and 11, 1913 May 7; 11.25 inches x 9.5 inches
Box Folder
M&A 1275 4 Clark no. M 216 0032 -- Drawing no. 2,994-B: Pulley frame for lift derrick for condenser tank, 1913 October 31; 12 inches x 9.5 inches
Box Folder
M&A 1275 4 Clark no. M 216 0033 -- Drawing no. 2,995-B: Pulley for life derrick for condenser tank, 1913 October 31; 12 inches x 9.5 inches
Box Folder
M&A 1275 4 Clark no. M 216 0037 -- Drawing no. 3,191-B: Instruction for using group tuner, 1914 April 30; 12.25 inches x 10.5 inches
Box Folder
M&A 1275 4 Clark no. M 216 0038 -- Drawing no. 3,193-B: Special cap for triangular steel towers, 1914 May 4 [Signal Corps order no 4,038.] ; 12 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0040 -- Drawing no. 3,206-B: Correct connections for national wireless telegraph set, 1914 May 18 [Blueprint with many annotations.] ; 11 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0044 -- Drawing no. 3,236-B: 2 KW condenser, top plate / (6 jars) with clips, 1914 June 30 [Pencil on tracing paper.] ; 12.5 inches x 10.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0045 -- Drawing no. 3,279-B: Jar receptacle for st'd round bottom jar, 1914 August 4; 12 inches x 10.25 inches
Box Folder
M&A 1275 5 Clark no. M 216 0047 -- Drawing no. 4,146-B: Extension handle for variable air condenser. '105' tuner, 1915 October 19 [Table: materials required.] ; 12.5 inches x 10.75 inches
Box Folder
M&A 1275 5 Clark no. M 216 0048 -- Drawing no. 4,164-B: Double pole single throw knife switch - 60 amp. 250 volts for 2 KW 500 cycle panel sets. Type P-4, 1915 December 10; 12.5 inches x 11.75 inches
Box Folder
M&A 1275 5 Clark no. M 216 0049 -- Drawing no. 4,199-B: Moving coil for wheatstone relay as furnished Oahu H.T. on F1211, 1915 October 28 [Table: material required.] ; 12.75 inches x 11 inches
Box Folder
M&A 1275 5 Clark no. M 216 0050 -- Drawing no. 2,002-AA: Foundation for steel mast, 1912 April 2; 15 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0051 -- Drawing no. 2,003-AA: Heel sheave for wooden top of steel masts, 1912 April 2 [SK 4,601.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0052 -- Drawing no. 2,004-AA: Guy anchors, 1912 April 6 [SK 4,495.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0053 -- Drawing no. 2,005-AA: Hoisting frame for cage (steel masts), 1912 April 6 [SK 4,497.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0054 -- Drawing no. 2,006-AA: Wooden topmast for steel masts, 1912 April 6 [SK 4,498.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0055 -- Drawing no. 2,009-AA: Panel switchboard for two 15 K.V.A. generators, 1912 April 13; 15 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0060 -- Drawing no. 2,030-AA: Panel switchboard for two 25 K.V.A. generators, 1915 May 14; 15 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0061 -- Drawing no. 2,031-AA: 25 KW disc discharger, 1912 May 28 [Pencil annotation: ref. to b/p 3,005 E. For insulators see: 3,005 E. Photograph: no 1,003.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 5 Clark no. M 216 0062 -- Drawing no. 2,060-AA: Disc discharger / 12" type, 1911; 15 inches x 9.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0064 -- Drawing no. 2,124-AA: Commercial ship set wiring diagram, 1912 June 12 [Pencil on tracing paper.] ; 15 inches x 8.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0065 -- Drawing no. 2,130-AA: 300 ft. steel mast. Bracket + sheave for erecting., 1912 June 18 [Pencil on tracing paper.] ; 13 inches x 9 inches
Box Folder
M&A 1275 6 Clark no. M 216 0066 -- Drawing no. 2,132-AA: 300 ft steel mast. Top mast + fittings., 1912 June 18 [Pencil on tracing paper.] ; 15 inches x 9 inches
Box Folder
M&A 1275 6 Clark no. M 216 0067 -- Drawing no. 2,140-AA: Wiring diagram for Marconi disc discharger, undated [2KW 240cyc. set.] ; 15 inches x 8 inches
Box Folder
M&A 1275 6 Clark no. M 216 0068 -- Drawing no. 2,141-AA: Wiring diagram for 2 KW quenched gap set, 1912 July; 17 inches x 9.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0075 -- Drawing no. 2,529-AA: Change-over plug for power & coil sets, 1912 September 24 [Pencil on tracing paper.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0076 -- Drawing no. 2,532-AA: Insulation bridge to convert united oscil. trans., 1912 September 27 [Pencil on tracing paper.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0077 -- Drawing no. 2,581-AA: Brush for 1&2 KW oscil. trans. & aerial induct., 1912 November 2 [Pencil annotation: for roller bearing contact (new) - see dwg. No. 3,257-D, 11-19-15.] ; 15.5 inches x 9.75 inches
Box Folder
M&A 1275 6 Clark no. M 216 0078 -- Drawing no. 2,603-AA: Antenna inductance for ship sets, 1912 November 29 [Pencil and pen on tracing paper.] ; 13 inches x 8.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0079 -- Drawing no. 2,604-AA: Secondary of oscillation transformer, ship set., 1912 November 29 [Pencil on and pen tracing paper.] ; 13 inches x 8.75 inches
Box Folder
M&A 1275 6 Clark no. M 216 0080 -- Drawing no. 2,645-AA: Wiring diagram of type #101 receiving set, 1913 March 13; 15.5 inches x 9.75 inches
Box Folder
M&A 1275 6 Clark no. M 216 0081 -- Drawing no. 2,666-AA: Transformer connections / 2 KVA 500~ 13,000-170, 1913 February 8; 13 inches x 8.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0084 -- Drawing no. 2,738-AA: Details of quenched spark gap - 2 KW, 1913 April 25 [Pencil on tracing paper. Pencil annotations: superseding cat. Nos. 2,399, 2,400, 2,401, dwg no 2,239-E. 2 KW 240 cycle special.] ; 14.25 inches x 9.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0085 -- Drawing no. 2,739-AA: Base plate for quenched spark gap 1+2 KW, 1913 April 25 [Pencil on tracing paper.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0086 -- Drawing no. 2,947-AA: Wiring diagram / auxiliary coil-turner, 1913 August 29 [Pencil on tracing paper. Red pencil annotation: suspended.] ; 15 inches x 9.5 inches
Box Folder
M&A 1275 6 Clark no. M 216 0087 -- Drawing no. 3,013-AA: Antenna construction, 1913 December 6; 14.25 inches x 10.25 inches
Box Folder
M&A 1275 6 Clark no. M 216 0088 -- Drawing no. 3,032-AA: Diagram of connections 2 KW - D.D. set and auxiliary, 1913 December 6; 16 inches x 10.5 inches
Box Folder
M&A 1275 7 Clark no. M 216 0089 -- Drawing no. 3,033-AA: New type "Bradfield" insulator, 1913 December 6; 14.5 inches x 11 inches
Box Folder
M&A 1275 7 Clark no. M 216 0090 -- Drawing no. 3,034-AA: Arrangement of apparatus in operating room - 2 KW d. disch. set., 1913 December 6; 14.5 inches x 11 inches
Box Folder
M&A 1275 7 Clark no. M 216 0091 -- Drawing no. 3,035-AA: Detail of connections for changing from power set to coil, 1913 December 6; 16.5 inches x 10.5 inches
Box Folder
M&A 1275 7 Clark no. M 216 0092 -- Drawing no. 3,036-AA: Type 'S' aerial switch connections, 1913 December 6; 14.25 inches x 10.75 inches
Box Folder
M&A 1275 7 Clark no. M 216 0093 -- Drawing no. 3,037-AA: Charging panel connections. 10" coil sets, 1913 December 6 [See: 3,263-E. 3,784-A.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1275 7 Clark no. M 216 0094 -- Drawing no. 3,044-AA: Wiring layout back view. 1/2KW panel set, 1914 January 19; 17 inches x 10.75 inches
Box Folder
M&A 1275 7 Clark no. M 216 0095 -- Drawing no. 3,073-AA: Rotary gap transformed to a stationary spark gap, 1912 January 13; 16.25 inches x 10.5 inches
Box Folder
M&A 1275 7 Clark no. M 216 0096 -- Drawing no. 3,074-AA: Muffler box, 1914 January 13; 16.25 inches x 10.75 inches
Box Folder
M&A 1275 7 Clark no. M 216 0097 -- Drawing no. 3,083-AA: Group tuning scheme, 1914 January 22; 16.25 inches x 10.75 inches
Box Folder
M&A 1275 7 Clark no. M 216 0099 -- Drawing no. 3,097-AA: Tuning type '103' shown connected to type 'S' - aerial switch. / (also for tuner, type '107'), 1914 February 4; 17.25 inches x 11.25 inches
Box Folder
M&A 1275 7 Clark no. M 216 0100 -- Drawing no. 3,103-AA: 1/2 KW dynamo with disc. disch'ger. For aeroplane set., 1914 February 18; 16.25 inches x 10.75 inches
Box Folder
M&A 1275 7 Clark no. M 216 0101 -- Drawing no. 3,104-AA: Portable receiver for aeroplane sets, 1914 February 18 [Table: reference/weights.] ; 16.5 inches x 11 inches
Box Folder
M&A 1275 7 Clark no. M 216 0102 -- Drawing no. 3,105-AA: Transmitter for radio aeroplane set, 1914 February 19; 16.5 inches x 10.75 inches
Box Folder
M&A 1275 7 Clark no. M 216 0103 -- Drawing no. 3,169-AA: Arrangement of apparatus for Gulf refining coils, 1914 April 4 [Pencil on tracing paper.] ; 14.25 inches x 10.5 inches
Box Folder
M&A 1275 7 Clark no. M 216 0104 -- Drawing no. 3,170-AA: Arrangement of apparatus for Gulf refining coils, 1914 April 4 [Pencil on tracing paper.] ; 14.25 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0105 -- Drawing no. 3,300-AA: Elementary wiring diagram of change over Sw for Ketchikan, 1914 August 28; 16.25 inches x 11 inches
Box Folder
M&A 1276 1 Clark no. M 216 0110 -- Drawing no. 3,482-AA: General dimensions and layout of 2 KW 500~ quenched spk gap set / individual type, for ship installation, 1914 November 28; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0111 -- Drawing no. 3,544-AA: Wave length switch complete - 2KW / 500 cycle Q.S.G. panel, -type "P-3" / Cat. #3154. -See drawing no. 3564-AA and 3557-A, 1914 December 30 [As supplied on Navy contract no. 21,507.] ; 17.25 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0113 -- Drawing no. 3,556-AA: Condenser rack - 2KW 8 jars / each .002 MF type WS. panel type P-3, 1914 December 30; 17.25 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0114 -- Drawing no. 3,733-AA: Suggested outline of 2-KW motor generator 500~ / revised to specifications 20-F, 2/11/15, 1915 February 11; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0115 -- Drawing no. 3,742-AA: Transmitter, 10-KW - 500 cycle / signal corps proposal 146, 2/8/15 / reg'n 2421 Seattle, 1915 February 16; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0116 -- Drawing no. 3,564-AA: Transmitter, type "P-3"- side elev., 2 K.W., 500 cycle. - cat. no 3154, 1915 January 2 [As supplied on Navy contract no. 21,507.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0117 -- Drawing no. 3,568-AA: Motor generator 2 KW type CW / 15-inductor-120 v. - D.C> 220/110 v. / 500 cycle single, 1914 December 31 [As supplied on Navy contract no. 21,507. Table: table of parts.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0118 -- Drawing no. 3,826-AA: Wiring layout for 5 KW-500~ / quenched spark gap set, Astoria, 1915 April 28 [Revised 8/3/15.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0119 -- Drawing no. 3,848-AA: Panel drilling of lower unit / showing drilling for D.C. auto starter only : 1/2KW. 500~ panel set, type P5, 1916 May 25; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0120 -- Drawing no. 3,880-AA: Sirocco blower & motor for quenched gap, 1915 May 18 [Pencil on tracing paper.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0121 -- Drawing no. 3,902-AA: Schematic wiring layout. 2 KW 500~ panel sets. type P-4A. catalog no. 3174. - form F-7., 1915 June 2; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0122 -- Drawing no. 3,903-AA: Transmitting panel (front + side views) 2 KW 500~ panel sets / type P-4A; catalog 3174; form F-7, 1915 June 2; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0123 -- Drawing no. 3,936-AA: Assembly of transmitting panel for 2 KW 500~ radio sets / type P4, 1915 July 20 [Ref. dwg # 3,813-G.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 1 Clark no. M 216 0124 -- Drawing no. 3,938-AA: Rotary gap & blower for 2 KW / 500~ radio sets type P4 / cat. No. 3172, 1915 July 20 [Ref. dwg # 3,819-F.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0125 -- Drawing no. 3,943-AA: Section of motor generator for 2 KW 500~ radio sets / type P4, 1915 July 21 [Table: ref. and details.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0126 -- Drawing no. 3,950-AA: Primary condenser for 2 KW 500~ / radio sets type P4 / cat. No. 3172, 1915 July 20 [Red. D'w'g # 3,780-G.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0127 -- Drawing no. 3,951-AA: Diagram of transmitter circuit for 2KW 500 cycle radio sets, 1915 September 3; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0128 -- Drawing no. 3,956-AA: Assembly of .5KW 500 cycle / radio set type P5, 1915 August 14; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0131 -- Drawing no. 3,982-AA: Diagram of transmitter circuit .5 KW 500 cycle radio set type P5, 1915 August 14; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0134 -- Drawing no. 3,991-AA: Proposed changes on blower system for buffing wheels as suggested by Lewis T. Bryant, Commissioner of Labor, Trenton, N.J., 1915 September 1; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0135 -- Drawing no. 3,992-AA: Schematic wiring layout. 1 + 2 KW 500 cycle generator exciter panel sets / type P-4-B / U.S. Army Sig. Corps. order #2716-7-9-15, 1915 September 2; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0136 -- Drawing no. 4,008-AA: Front view & wiring layout / battery charging panel for 7-P.V.N., -11-M.V.N.,-&13-M.V.N. / batteries, 1915 July 6; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0142 -- Drawing no. 4,109-AA: Assembly of English type signalling switch, 1915 December 9; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0143 -- Drawing no. 4,113-AA: Protective grounding device for 5 KW 500~ panel sets.Type: P-5, 1915 September 27 [For details of ground strips see dwg. # 3,953F.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0144 -- Drawing no. 4,115-AA: Mica condenser clamping plates, 1915 October 25; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0149 -- Drawing no. 4,192-AA: Assembly of transmitting panel for 1 KW 500~ / 2 KW 500~ . / cycle panel sets type P-4-B (shop drawing 3972-G), 1915 August 26 [Catalog no: 3,184-entire.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0150 -- Drawing no. 4,198-AA: Details of low power switch 2 KW 500 type P-4-0.5KW 500 cycle panel sets type P-5, 1915 October 30 [Table: material required.] ; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0151 -- Drawing no. 4,215-AA: Proposed 5 KW transformer & reactance for Navy schedule no. 9405, 1916 April 8; 16.5 inches x 10.75 inches
Box Folder
M&A 1276 2 Clark no. M 216 0152 -- Drawing no. 4,238-AA: Elementary wiring diagram for 5 KW 500~ transmitter, type 6, 1916 February 25; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0153 -- Drawing no. 4,240-AA: Connection diagram of 5 KW, type P-6 transmitter, 1916 February 28; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0154 -- Drawing no. 4,264-AA: Inductance coil and handle, used on #27 and #28 wave meter, 1916 April 21; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0155 -- Drawing no. 4,265-AA: Layout of panel for #28 wave-meter, 1916 April 22 [Pencil annotation: obsolete.] ; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0158 -- Drawing no. 4,286-AA: Bill of material / change-over switch for IOTA tuner, 1916 April 14; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0159 -- Drawing no. 4,299-AA: Bill of materials for duplex air condenser .003 M.F. capacity for dwg no. 4270-G, 1916 June 10; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0160 -- Drawing no. 4,313-AA: Transmitting panel type P-5 / 1/2KW - 500~; with modified frame reg'n 1591; F.no.1389 / spec'n no 3686-S, 1915 December 7; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0161 -- Drawing no. 4,369-AA: Sarnoff drawing - early Marconi tuned transmitters and receivers, 1916 March 9; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0162 -- Drawing no. 4,375-AA: Juneau 10 KW 500 cycle set: wire and conduit list, 1916 October 2 [Superseding no 4,375AA; 6-3-16.] ; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0163 -- Drawing no. 4,392-AA: Topmast and rigging of 165' and 140' Milliken Towers, 1916 May 10; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0164 -- Drawing no. 4,402-AA: Assembly of motor & generator / field rheostat for 2 KW 500~ type P-4 panel set and 1/2KW 500~ type P-5 panel set, 1916 May 2 [Catalog no. 3,817. Superseding no 3,919F + 3,426F.] ; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0165 -- Drawing no. 4,476-AA: Bill of materials for coupling device for receivers, undated; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0166 -- Drawing no. 4,514-AA: Connection diagram of 3 KW 60~ nonsynchronous gap set, 1916 November 3; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0167 -- Drawing no. 4,518-AA: Assembly / secondary choke coil / for use on Juneau Alaska 10 KW spec. type transmitter, 1916 December 6 [Table: bill of materials.] ; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0168 -- Drawing no. 4,520-AA: Wiring diagram of jar measuring apparatus, 1916 August 15; 16.5 inches x 10.75 inches
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M&A 1276 3 Clark no. M 216 0170 -- Drawing no. 4,539-AA: Insulated handle for no 28 wavemeter, 1916 November 4 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0183 -- Drawing no. 4,821-AA: Wiring diagram of control unit / 1/2KW panel transmitter, 1917 January 14; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0184 -- Drawing no. 4,833-AA: Gear wheels for standard operating gear 2KW 500~ panel set / type P4, 1916 June 13; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0185 -- Drawing no. 4,840-AA: Untitled; on drawing "Item no. 27 drg. No 4840AA / connector / copper tubing - 20 3/4 long / 1 required," undated; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0187 -- Drawing no. 4,859-AA: Gear wheels, for standard operating gear / 1/2KW 500~ panel set type P5, 1916 May 26; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0188 -- Drawing no. 4,864-AA: Assembly of tone tester for N.S. 75 & 134, 1916 October 13; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0189 -- Drawing no. 4,871-AA: Quenched gap unit / 1/2KW transmitter / Navy spec. 71, 1916 December 8 [Pencil annotation: if these are adopted supersede similar items on 4,809G.] ; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0190 -- Drawing no. 4,872-AA: Elementary wiring diagram for the 1/2 KW 500~ panel sets, 1917 January 18; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0191 -- Drawing no. 20,065-AA: Wrench / assembly / 2 KW quenched gap / type CM 314, 1917 October 30 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0192 -- Drawing no. 4,882-AA: Material list / changes 5 KW type P1 / transmitter, 1916 December 21 [General assembly dr'g # 4,881G.] ; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0193 -- Drawing no. 4,884-AA: Material list / universal wave changer for 5 KW set / per N. sched. R.E.13A 111C, 1916 December 20; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0194 -- Drawing no. 4,890-AA: Small square multiple turn antenna, 1916 December 22; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0195 -- Drawing no. 4,891-AA: Wiring diagram / type 112 receiver for 1/4 KW cargo set, 1916 December 29; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0196 -- Drawing no. 4,895-AA: Method of folding blueprints / perspective sketch, 1916 December 26; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0197 -- Drawing no. 4,896-AA: Wiring layout / type 112 receiver / for 1/4 KW cargo set, 1917 August 30; 16.5 inches x 10.75 inches
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M&A 1276 4 Clark no. M 216 0198 -- Drawing no. 4,898-AA: Assembly of proposed protective device for aerial ammeter / on Std 2 KW 500~ P8 / panel set, 1916 December 26; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0199 -- Drawing no. 4,904-AA: Switch for variable / 5 step condenser, 1916 December 1 [Pencil annotation: not used see # 20,044 AA. Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0200 -- Drawing no. 4,920-AA: Pri coup. coil form (front), 1917 January 8; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0201 -- Drawing no. 4,921-AA: Pri coup. coil form (back), 1917 January 8; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0202 -- Drawing no. 4,945-AA: Gears, 1917 January 15; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0203 -- Drawing no. 4,995-AA: Front end of condenser / special receiver, 1917 January 10; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0204 -- Drawing no. 4,996-AA: Primary + secondary condenser scales, 1917 January 10; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0206 -- Drawing no. 5,015-AA: Front elevation / receiver type 117 / for 1/4 KW cargo set, 1917 January 19 [Catalog number: 4,370 entire.] ; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0207 -- Drawing no. 5,031-AA: Foldings of standard drawing sizes, 1917 January 12; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0208 -- Drawing no. 5,037-AA: Tuning chart for 1/4 KW cargo set, 1917 January 15; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0209 -- Drawing no. 5,042-AA: Berel gears, 1917 January 17; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0210 -- Drawing no. 5,081-AA: Supporting tube, 1917 February 1; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0211 -- Drawing no. 5,092-AA: Rheostat / supplied with type 112 receiver / wound on slate core, 1917 February 2 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0212 -- Drawing no. 5,162-AA: Gap, quenched - assembly, 1917 February 6 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0213 -- Drawing no. 5,198-AA: Assembly of extension handle for wave length switch, 1917 February 16 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 5 Clark no. M 216 0214 -- Drawing no. 5,274-AA: Assembly of sliding contact, 1917 February 19 [Table: bill of material. Pencil annotation: cancelled.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0215 -- Drawing no. 5,305-AA: Potentiometer / supplied with type 112 receiver / wound on slate core, 1917 February 2 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0216 -- Drawing no. 5,336-AA: Insulator for antenna lead in, 1917 March 1 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0217 -- Drawing no. 5,353-AA: Connector plug. assembly, 1917 March 2 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0218 -- Drawing no. 5,358-AA: Terminal block assembly, 1917 March 2 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0219 -- Drawing no. 5,360-AA: Plug block assembly, 1917 March 1 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0220 -- Drawing no. 5,369-AA: Protective gap and contacts, 1917 March 1 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0221 -- Drawing no. 5,419-AA: Switch-telephone / four pole double throw, 1917 March 15 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0222 -- Drawing no. 5,429-AA: 5 KW Navy switchboard (modified), 1917 April 10; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0223 -- Drawing no. 5,457-AA: Miscellaneous details / 1/2K 500~ type P5 transmitter / sheet 3, 1917 March 28 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0224 -- Drawing no. 5,492-AA: Panel for secondary loading inductance / short wave receiver type 113, 1917 April 11 [Pencil annotation: VOID.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0225 -- Drawing no. 5,496-AA: Tuning chart for 1/2 KW cargo set, 1917 April 13; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0226 -- Drawing no. 5,534-AA: Assembly of reel weight, 1917 April 10 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0227 -- Drawing no. 5,556-AA: Stopping condenser, 1917 April 12 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0228 -- Drawing no. 5,836-AA: Sliding contact for 1/2KW 500~ type P5 panel set, 1917 April 20 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 6 Clark no. M 216 0229 -- Drawing no. 5,839-AA: Variometer slider for 2 KW 500~ type PB panel set, 1917 April 20 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0230 -- Drawing no. 5,842-AA: Connection clip for primary and secondary, 1917 April 23 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0231 -- Drawing no. 20,000-AA: Condensers for aeroplane generator, 1917 April 25 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0232 -- Drawing no. 20,001-AA: Cabinet / for aeroplane set - showing drilling for side panel, 1917 April 26; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0233 -- Drawing no. 20,002-AA: Panel / power unit with drilling layout, 1917 April 26; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0234 -- Drawing no. 20,003-AA: Panel / quenched gap with drilling layout, 1917 April 26 [Superseded by drg. No. 20,015-AA.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0235 -- Drawing no. 20,004-AA: Material / bill of, aeroplane generator (see dwg no 5248-F), 1917 May 4; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0236 -- Drawing no. 20,005-AA: Template / alternative for 2 KW panel / radio switchboard, 1917 May 11; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0237 -- Drawing no. 20,006-AA: Buzzer transformer, 1917 May 17 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0238 -- Drawing no. 20,007-AA: Switch quenched gap / sub. partial assembly, 1917 May 22 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0239 -- Drawing no. 20,008-AA: Bill of material / oscillation transformer / wave-length switch coupling mechanism / U.S. Navy 1/2KW panel radio set, 1917 May 23 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0240 -- Drawing no. 20,009-AA: Latch / quenched gap / sub partial assembly, 1917 May 25 [Table: bill of material. Red pencil annotation: not used.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0241 -- Drawing no. 20,010-AA: Key / morse / LEGLE9S / assembly of, 1917 July 3 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0242 -- Drawing no. 20,011-AA: Transformer condenser frame / partial assembly, 1917 May 24 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0243 -- Drawing no. 20,012-AA: Panel plug, 1917 June 5 [Table: bill of material. List of d'w'gs--10,337-A] ; 16.5 inches x 10.75 inches
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M&A 1276 7 Clark no. M 216 0244 -- Drawing no. 20,013-AA: Tray - spare part box / 1 KW aeroplane set, 1917 July 10; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0245 -- Drawing no. 20,014-AA: Auxiliary panel & frame / motor boat set, 1917 June 7 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0246 -- Drawing no. 20,015-AA: Panel / quenched gap / this supersedes drg. 20,003-AA, 1917 June 14; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0247 -- Drawing no. 20,016-AA: Antenna insulator & plug connector / motor boat set, 1917 June 14 [Table: bill of material. For list of drawings see dwg #10,413] ; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0248 -- Drawing no. 20,017-AA: Key, 1917 June 18 [Table: bill of material. Cancelled bill of material see 32,017] ; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0249 -- Drawing no. 20,018-AA: Bill of material / short wave receiver / type CM 294 / (master assembly), 1917 June 17 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0250 -- Drawing no. 20,019-AA: Voltmeter switch / U.S. Navy 1/2 KW panel radio set / partial assembly, 1917 June 27 [Table: bill of material. List of drawings 10,454.] ; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0251 -- Drawing no. 20,020-AA: Terminal / intermediate secondary, 1917 July 23 [Table: bill of material. List of drawings #10,557.] ; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0252 -- Drawing no. 20,021-AA: Ground plug / 1/2 KW motor boat set, 1917 June 27 [Table: bill of material. For list of drawings see 10,436A.] ; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0253 -- Drawing no. 20,022-AA: Master assemblies 'A' & 'B' / U.S. Navy 1/2 KW panel radio set / bill of material, 1917 June 23; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0254 -- Drawing no. 20,023-AA: Tray, spare-part-box / U.S. Navy 1/2 KW panel radio set, 1917 June 20; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0255 -- Drawing no. 20,024-AA: Side panel / condenser rack, 1917 July 20; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0256 -- Drawing no. 20,025-AA: Supporting bracket / rear left, 1917 July 20; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0257 -- Drawing no. 20,026-AA: Supporting bracket / rear right, 1917 July 20; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0258 -- Drawing no. 20,027-AA: Motor generator / Crocker Wheeler Co. / U.S. Navy 1/2 KW panel radio set, 1917 July 23; 16.5 inches x 10.75 inches
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M&A 1277 1 Clark no. M 216 0259 -- Drawing no. 20,028-AA: Binding post receiver, 1918 August 8 [Table: bill of material. Bill of raw mat. 6,599. Drawing list = no. 10,643.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0260 -- Drawing no. 20,029-AA: Schematic wiring diagram / power and radio units / U.S. Navy 1/2 KW panel radio set, 1917 June 20; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0261 -- Drawing no. 20,030-AA: Tray, upper / spare part box, 1917 August 18; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0262 -- Drawing no. 20,031-AA: Switch / short circuit, 1917 August 24 [Table: bill of material. List of drawings = no. 10,687.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0263 -- Drawing no. 20,032-AA: Switchboard panel (bottom) 20 KW radio set, 1917 August 24; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0264 -- Drawing no. 20,033-AA: Switchboard panel (center) / 20 KW radio set, 1917 August 24; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0265 -- Drawing no. 20,034-AA: Switchboard panel (top) / 20 KW radio set, 1917 August 23; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0266 -- Drawing no. 20,035-AA: Wiring diagram for 1&2 KW radio room panel for Naval auxiliary sets / RE23F104F and RE23F105B, 1917 March 5 [Red pencil annotation: obsolete see 20,043.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0270 -- Drawing no. 20,038-AA: Support, front condenser, 1917 August 20 [Red pencil annotation: not used. Blue pencil annotation: advanced print.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0271 -- Drawing no. 20,039-AA: Support centre condenser, 1917 August 21 [Red pencil annotation: not used. Blue pencil annotation: advanced print.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0272 -- Drawing no. 20,040-AA: Tube, supporting, 1917 August 20 [Red pencil annotation: not used.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0273 -- Drawing no. 20,041-AA: Support, back condenser, 1917 August 20 [Red pencil annotation: not used. Blue pencil annotation: advanced print.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0274 -- Drawing no. 20,042-AA: Panel, front, 1917 August 16 [Red pencil annotation: not used. Blue pencil annotation: advanced print.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0275 -- Drawing no. 20,042-AA: Panel, rear, 1917 August 16 [Red pencil annotation: not used. Blue pencil annotation: advanced print.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0276 -- Drawing no. 20,044-AA: Stopping condenser / switch, 1917 October 2 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 2 Clark no. M 216 0277 -- Drawing no. 20,045-AA: Dimensions 2 KW power unit / universal engine & CW 2AE generator / 500~ 115v. D.C. 1500 RPM / copied from Copley Mfg. Co. no. 3201A, 1918 October 10; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0278 -- Drawing no. 20,046-AA: Panel, supporting / front, 1917 October 2; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0279 -- Drawing no. 20,047-AA: Panel - supporting / rear, 1917 October 2; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0280 -- Drawing no. 20,048-AA: Schematic wiring diagram / 1 & 2 KW radio room panels / Naval auxiliary sets, 1917 October 3; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0281 -- Drawing no. 20,049-AA: Quenched gap unit / 2 KW self cooled 4 flange type / model US 315, 1917 October 8 [Table: bill of material. Table: list of sub assemblies] ; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0282 -- Drawing no. 20,050-AA: Protective - device, type CD 53 / Max. 150 amp - 500 volt. capacity .05-.05mfd / from Dubilier Condenser Co. drg no 105, 1917 October 9; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0283 -- Drawing no. 20,051-AA: Gap plate (female) / 2 KW quenched gap - self cooled / model US 315, 1917 October 9 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0284 -- Drawing no. 20,052-AA: Gap plate (male) / 2 KW self cooled quenched gap / model US 315, 1917 October 10 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0287 -- Drawing no. 20,054-AA: Panel-front, 1917 October 17; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0288 -- Drawing no. 20,055-AA: Frame, supporting, 1918 October 17; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0289 -- Drawing no. 20,056-AA: Trough, blower system, 1917 October 12; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0290 -- Drawing no. 20,057-AA: Side panel right / 10 KW quench(ed) gaps, 1917 October 13 [Red crayon correction of quench to quenched.] ; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0291 -- Drawing no. 20,058-AA: Side panel left / 10 KW quench(ed) gaps, 1917 October 13 [Red crayon correction of quench to quenched.] ; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0292 -- Drawing no. 20,059-AA: Outline assembly / power unit type CO 316 CB 238 / 2 KW auxiliary radio transmitter / type CM 307, 1918 October 24; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0293 -- Drawing no. 20,060-AA: Panel (front), 1917 October 22; 16.5 inches x 10.75 inches
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M&A 1277 3 Clark no. M 216 0294 -- Drawing no. 20,061-AA: Panel (rear), 1917 October 22; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0295 -- Drawing no. 20,062-AA: Side panel left, 1917 October 5; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0296 -- Drawing no. 20,063-AA: Side panel, right, 1917 October 5; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0297 -- Drawing no. 20,064-AA: Wrench / assembly / 5 W.W. quenched gap, 1917 October 31; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0298 -- Drawing no. 20,066-AA: Terminal / intermediate secondary, 1917 October 31 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0299 -- Drawing no. 20,067-AA: Angle support / end, 1917 November 3; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0300 -- Drawing no. 20,068-AA: Panel, 1917 November 2; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0301 -- Drawing no. 20,069-AA: Angle supporting / center, 1917 November 3; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0302 -- Drawing no. 20,070-AA: Tube supporting, 1917 November 3; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0303 -- Drawing no. 20,071-AA: Assembling base assembly / 2 KW quenched spark gap, 1917 November 7 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0304 -- Drawing no. 20,072-AA: Assembling base assembly / 5 KW quenched spark gap, 1917 November 7 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0305 -- Drawing no. 20,073-AA: 2 KW auxiliary hand ke / assembly / type CM 425, 1917 November 5 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0306 -- Drawing no. 20,074-AA: Binding post / assembly, 1917 November 7 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0307 -- Drawing no. 20,075-AA: Connector, 1917 November 8 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0308 -- Drawing no. 20,076-AA: Switch base, 1917 November 27 [Pen annotation: unauthorized .] ; 16.5 inches x 10.75 inches
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M&A 1277 4 Clark no. M 216 0309 -- Drawing no. 20,077-AA: Plate, rheostat supporting, 1917 November 27; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0310 -- Drawing no. 20,078-AA: Clamping plate, 1917 November 22; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0311 -- Drawing no. 20,079-AA: Second terminal insulator, 1917 November 23; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0312 -- Drawing no. 20,080-AA: Support bar, upper, 1917 December 13 [Pen annotation: 10 RE 31AA 1021B.] ; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0313 -- Drawing no. 20,081-AA: Support bar, lower front, 1917 December 12 [Pen annotation: 10 RE 31AA 1030B.] ; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0314 -- Drawing no. 20,082-AA: Support bar, lower rear, 1917 December 12 [Pen annotation: 10 RE 31AA 1029B.] ; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0315 -- Drawing no. 20,083-AA: Shaft, note clearer selector Sw., 1917 December 24 [Pen annotation: 10RE 32AA 1098B.] ; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0316 -- Drawing no. 20,084-AA: Support, ends, condenser, 1917 October 20 [Pen annotation: 10RE 31AA 1019A.] ; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0317 -- Drawing no. 20,085-AA: Support, centre, condenser, 1917 October 20 [Pen annotation: 10RE 31AA 1020A.] ; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0321 -- Drawing no. 20,090-AA: Back-arm, 1918 January 26; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0322 -- Drawing no. 20,091-AA: Base for quenched gap - 20 KW cuban set, 1918 February 11 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0323 -- Drawing no. 20,092-AA: Panel wiring for Tungar rectifier charging outfit / 20KW Cuban set, 1918 February 15; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0324 -- Drawing no. 20,093-AA: Panel (primary), 1918 February 1; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0325 -- Drawing no. 20,094-AA: Panel (secondary), 1918 February 2; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0326 -- Drawing no. 20,095-AA: Template for layout of radio SWBD / 1 + 2 KW Naval emergency sets, 1918 February 28; 16.5 inches x 10.75 inches
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M&A 1277 5 Clark no. M 216 0327 -- Drawing no. 20,096-AA: Rim loading coils / 1 KW panel set, 1918 March 24; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0328 -- Drawing no. 20,097-AA: Tube, supporting / condenser rack, 1918 February 19; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0329 -- Drawing no. 20,098-AA: Condenser rack, 1918 February 18 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0330 -- Drawing no. 20,099-AA: Panel - left, 1918 January 25; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0331 -- Drawing no. 20,100-AA: Panel - right, 1918 January 25; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0332 -- Drawing no. 20,101-AA: Rim (primary coil), 1918 February 4; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0333 -- Drawing no. 20,102-AA: Meter panel, upper, 1918 February 6; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0334 -- Drawing no. 20,103-AA: Meter panel, lower, 1918 February 6; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0335 -- Drawing no. 20,104-AA: Schematic wiring diagram / motor boat set / type CM 98, 1918 March 21; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0336 -- Drawing no. 20,105-AA: Rim - secondary, 1918 February 11; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0337 -- Drawing no. 20,106-AA: Template for layout / 2, 5, + 10 KW radio SWBD, 1918 March 4; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0338 -- Drawing no. 20,107-AA: Reactance switch / 1 KW panel set, 1918 February 27 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0339 -- Drawing no. 20,108-AA: Wiring diagram / induction starter / 20 KW Cuban set, 1918 March 5; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0340 -- Drawing no. 20,109-AA: Connector / secondary to ground, 1918 March 5 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0341 -- Drawing no. 20,110-AA: Connector / secondary, 1918 March 5 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 6 Clark no. M 216 0342 -- Drawing no. 20,111-AA: Connector / primary, 1918 March 5 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0343 -- Drawing no. 20,112-AA: Assembly / core insulator, 1918 March 16 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0344 -- Drawing no. 20,113-AA: Assembly / primary terminal, 1918 March 18 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0345 -- Drawing no. 20,114-AA: Assembly / reactance support, 1918 March 15 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0346 -- Drawing no. 20,115-AA: Connector, 1918 April 4; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0439 -- Drawing no. 20,207-AA: Primary coil, 1918 August 1; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0456 -- Drawing no. 20,224-AA: Box, 1918 August 15; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0457 -- Drawing no. 20,225-AA: Cover, special connections / for transformer primary terminals / masters control switch circuit / for merchant vessels, 1918 August 15 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0458 -- Drawing no. 20,226-AA: Connector / condenser to wave changer 2 KW, 1918 August 16; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0459 -- Drawing no. 20,227-AA: Cover / for special signal / corps receiver / type 102-121-122, 1918 August 19 [Table: bill of material. Pen annotation: traced from D.S.380.] ; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0460 -- Drawing no. 20,228-AA: Dial switch / 4 point type SW-5 / radio receiving set box / type BC-14A, 1918 August 23 [Table: bill of material. For bill of raw mat'l see spec no. 6,474.] ; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0461 -- Drawing no. 20,229-AA: Dial switch 6 point / SW-5 / radio receiving set box / type BC-14A, 1918 August 27 [Table: bill of material. For bill of raw mat'l see spec no. 6,474.] ; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0462 -- Drawing no. 20,230-: Instruction sheet & circuit label for set box - type BC-14A, 1918 August 29; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0463 -- Drawing no. 20,231-: Cover / transformer case / 20 KW -500 cycle - transformer, 1918 August 27; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0464 -- Drawing no. 20,232-: Side- transformer case / 20 KW - 500 cycle transformer, 1918 August 26; 16.5 inches x 10.75 inches
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M&A 1277 7 Clark no. M 216 0465 -- Drawing no. 20,233-: Stopping condenser / special Signal Corps receiver / types 120, 121, 122, 1918 September 11 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0466 -- Drawing no. 20,234-: Telephone condenser / special Signal Corps receiver / types 120, 121, 122, 1918 September 11 [Table: bill of material.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0467 -- Drawing no. 20,241-: Telephone jack / trench radio transmitter & receiver / type S.C.R. -105, 1918 September 20 [Pen annotation: unauthorized 12/6/18.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0468 -- Drawing no. 20,243-: Vibrator support / transformer, 1918 September 20 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0469 -- Drawing no. 20,244-: Base / transformer, 1918 September 27 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0470 -- Drawing no. 20,245-AA: Case & key condenser assembly, 1918 September 27; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0471 -- Drawing no. 20,247-AA: Frame / hand reel, 1918 October 2 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0472 -- Drawing no. 20,248-: Inside brace / 20 KW condenser mounting, 1918 October 10 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0473 -- Drawing no. 20,249-: Center support / 20 KW condenser mounting, 1918 October 9; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0474 -- Drawing no. 20,250-: Center brace / 20 KW condenser mounting, 1918 October 9 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0475 -- Drawing no. 20,251-: Inside support / 20 KW condenser mounting, 1918 October 10 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0476 -- Drawing no. 20,252-: Outside support / 20 KW condenser mounting, 1918 October 9 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0477 -- Drawing no. 20,253-AA: Hand starter & transfer switch panel / 2 KW 440 v. D.C., 1918 October 16; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0478 -- Drawing no. 20,254-AA: [Untitled], 1918 October 1 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0479 -- Drawing no. 20,255-AA: Intermediate panel / trench radio transmitter & receiver, 1918 October 8 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 1 Clark no. M 216 0480 -- Drawing no. 20,256-AA: Intermediate panel, 1918 September 24 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0481 -- Drawing no. 20,257-AA: Extension cord type CD40, 1918 September 30 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0482 -- Drawing no. 20,258-AA: Primary tube / receiving coupler, 1918 October 10 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0483 -- Drawing no. 20,259-AA: Shock proof detector, 1918 October 10 [Pen annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0484 -- Drawing no. 20,260-: Panel / power unit / with drilling layout / type C296 B set, 1918 November 12; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0485 -- Drawing no. 20,261-: Primary inductance tube, 1918 November 13; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0486 -- Drawing no. 20,262-: Location of plugs / 70 ft sectional wooden mast, 1918 November 14; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0487 -- Drawing no. 20,263-: Location of wrapping, sleeve & guide bands / 70 ft sectional wooden mast, 1918 November 15; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0488 -- Drawing no. 20,264-AA: Dimensions / motor generator exciter / 220 volt., 1 phase AC drive, 5 KW / C.W. Wagner 17T.R.A.-5I-S-D17 [?], 1918 November 14; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0489 -- Drawing no. 20,265-AA: Dimensions / motor generator exciter / 220 volt., 3 phase AC drive, 5 KW / C.W. 114 Q / 5I / 5D17, 1918 November 14; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0490 -- Drawing no. 20,266-AA: Secondary inductance / tickler coupling / S.W. receiver, 1918 November 2; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0491 -- Drawing no. 20,267-AA: Spider / generator / mule pack set type M-1, 1918 November 25; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0492 -- Drawing no. 20,268-AA: Socket of hoisting pole / 70 ft. sectional wooden mast, 1918 November 21; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0493 -- Drawing no. 20,269-: Ground-spike / 70 ft. sectional wooden mast, 1918 November 21; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0494 -- Drawing no. 20,270-: Location of linen tape and mast bands on spreader / 70 ft sectional wooden mast, 1918 November 25; 16.5 inches x 10.75 inches
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M&A 1278 2 Clark no. M 216 0495 -- Drawing no. 20,271-: Panel - primary / wave changer, 1918 January 6; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0496 -- Drawing no. 20,272-: Stator + rotor / laminations (d'w'gs 20274-20273) before separating, 1918 December 5; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0497 -- Drawing no. 20,273-: Lamination rotor, 1918 November 30 [Punch from dwg 20,272.] ; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0498 -- Drawing no. 20,274-: Stator lamination, 1918 November 29; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0499 -- Drawing no. 20,275-AA: Multiple switch / new short wave receiver / type CM 294 C, 1918 December 5; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0500 -- Drawing no. 20,276-AA: Stopping condenser switch / Navy short wave receiver / type CM 294C, 1918 December 13; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0502 -- Drawing no. 20,277-AA: Binding post / Navy short wave receiver / type CM 294-C, 1918 December 13; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0503 -- Drawing no. 20,278-AA: Stopping condenser / Navy short wave receiver / type CM 294C, 1918 December 13; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0505 -- Drawing no. 20,280-: Frame / antenna, supplies & spares saddle, 1918 December 14; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0507 -- Drawing no. 20,282-AA: Saddle-frame / mast saddle, 1918 December 17; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0508 -- Drawing no. 20,283-AA: Mast-frame / mast saddle, 1918 December 17; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0510 -- Drawing no. 20,285-: Shaft-connecting / engine generator saddle / mule pack set type M1, 1918 December 20; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0511 -- Drawing no. 20,286-: Shaft hollow / connecting shaft, 1918 December 26; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0512 -- Drawing no. 20,287-: Standard telephone jack plug, 1918 December 20; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0513 -- Drawing no. 20,288-: Shaft-generator / generator - exciter / 1/2 kW, 1918 December 12; 16.5 inches x 10.75 inches
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M&A 1278 3 Clark no. M 216 0514 -- Drawing no. 20,289-: Crank / generator exciter / 1/2 KW, 1918 December 17; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0515 -- Drawing no. 20,290-: Lever / wave changer, 1918 December 10; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0516 -- Drawing no. 20,291-: Ring rotor lamination clamp / generator exciter / 1/2 KW, 1918 November 29; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0517 -- Drawing no. 20,292-AA: Meter panel - lower, 1918 December 24; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0518 -- Drawing no. 20,293-: Meter panel, upper, 1918 November 19; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0519 -- Drawing no. 20,294-AA: Panel right / quenched gap rack, 1918 December 19; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0520 -- Drawing no. 20,295-AA: Panel, left / quenched gap rack, 1918 December 19; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0521 -- Drawing no. 20,296-: Support- front, condenser mounting, 1918 December 30; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0522 -- Drawing no. 20,297-: Support - rear / condenser mounting, 1918 December 31; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0523 -- Drawing no. 20,298-: Support- center / condenser mounting, 1918 December 31; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0524 -- Drawing no. 20,299-: Quenched gap unit / army cart set / type C3, 1918 December 26; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0525 -- Drawing no. 20,300-: Plate insulator / oil cooled transformer, 1919 January 2 [Red stamp annotation: unauthorized Jan 15, 1919.] ; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0526 -- Drawing no. 20,301-AA: Cover / oil cooled transformer, 1918 December 31 [Red stamp annotation: unauthorized Jan 15, 1919.] ; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0527 -- Drawing no. 20,302-: Case / receiver, 1919 January 2 [Pencil annotation: redraw.] ; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0528 -- Drawing no. 20,303-AA: Drilling - control panel, 1918 December 5; 16.5 inches x 10.75 inches
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M&A 1278 4 Clark no. M 216 0529 -- Drawing no. 20,304-: Protective shield receiver, 1919 January 4; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0530 -- Drawing no. 20,305-: Connector / wave-changer, 1919 January 19; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0531 -- Drawing no. 20,306-: Frame, front saddle / engine generator saddle, 1918 December 13; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0532 -- Drawing no. 20,307-: Frame rear saddle / engine generator saddle, 1918 December 14; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0533 -- Drawing no. 20,308-: Brace front tie / engine generator saddle, 1918 December 16; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0534 -- Drawing no. 20,309-: Brace rear tie / engine generator saddle, 1918 December 16 [Pencil annotation: not used / replaced by 20351.] ; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0535 -- Drawing no. 20,310-: Base / antenna switch, 1918 January 21 [Pencil annotation: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0536 -- Drawing no. 20,311-: Switch / simple + goniometer couplers / long distance receiving apparatus, 1919 January 24; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0537 -- Drawing no. 20,312-: Terminal - block / simple + goniometer couplers, 1919 January 25; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0539 -- Drawing no. 20,314-AA: Dial, 1919 January 20; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0540 -- Drawing no. 20,315-AA: Base / simple coupler, 1919 January 20; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0541 -- Drawing no. 20,316-: Base, 1919 January 24; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0542 -- Drawing no. 20,317-: Fixed inductance / 2.5 to 15 milihenries by steps / long distance rec. apparatus, 1919 February 4; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0543 -- Drawing no. 20,318-: Detector - Galena / separate mounting, 1919 February 8; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0545 -- Drawing no. 20,320-: Panel for receiver type 110, 1919 February 7; 16.5 inches x 10.75 inches
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M&A 1278 5 Clark no. M 216 0546 -- Drawing no. 20,321-: Case / receiver type 110 C-unit, 1919 February 17; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0547 -- Drawing no. 20,322-: D.C. line switch / 1/2 KW quenched multiple spark / transmitter, 1919 February 19; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0548 -- Drawing no. 20,323-: Spark gap / 1/2KW quenched multiple spark transmitter, 1919 March 26; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0549 -- Drawing no. 20,324-: Box / primary condenser, 1918 February 21; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0550 -- Drawing no. 20,325-: Gear-housing / arc set development, 1919 February 24; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0551 -- Drawing no. 20,326-: Oscillation transformer / 1/2KW quenched multiple spark trans-m, 1919 July 7; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0552 -- Drawing no. 20,327-: Switch D.P.S.T. / 30 Amp. 250 volts, fuse, front, 1919 February 24; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0553 -- Drawing no. 20,328-: Switch D.P.D.T / 60 amp. 250 volts; unfused, front connected, 1919 February 25; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0554 -- Drawing no. 20,329-: Primary condensers / 1/2KW quenched multiple spark transmitter / .045 and .135 microfarads, 1919 February 26; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0555 -- Drawing no. 20,330-: Felt pedestal / long distance receiving apparatus, 1919 February 27; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0556 -- Drawing no. 20,331-: Short wave condenser / 1/2KW quenched multiple spark transmitter / .005 microfarads, 1919 March 1; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0558 -- Drawing no. 20,333-: Case / variable inductance, 1919 March 11; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0559 -- Drawing no. 20,334-: Terminal block (moulded) / 1/2 KW quenched multiple / spark transmitter, 1919 March 14; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0560 -- Drawing no. 20,335-: Top panel / variable inductance, 1919 March 14; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0561 -- Drawing no. 20,336-: Pulley coupling / radio cart set, 1919 March 17; 16.5 inches x 10.75 inches
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M&A 1278 6 Clark no. M 216 0562 -- Drawing no. 20,337-: Spider coupling / radio cart set, 1919 March 17; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0563 -- Drawing no. 20,338-: Coupling, generator & engine, 1919 March 18; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0565 -- Drawing no. 20,340-: Rim / loading coil / army cart set, 1919 March 20; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0566 -- Drawing no. 20,341-: Rim (antenna) / loading coil / army cart set, 1919 March 20; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0567 -- Drawing no. 20,342-: Wiring, automatic start / 10 HP 220 volt, 2 or 3 phase / auto transformer type Cuttler Hammer Co., 1919 March 27; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0568 -- Drawing no. 20,343-: Cover- motor starter / 1/2KW quenched multiple spark / transmitter, 1919 April 3; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0569 -- Drawing no. 20,344-: Case / variable condenser, 1919 April 14; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0570 -- Drawing no. 20,345-: Primary tens switch / type 106B receiver, 1919 April 15; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0571 -- Drawing no. 20,346-: Gear drive for speed indicator / engine cart, 1919 April 4; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0572 -- Drawing no. 20,347-: Unit switch / type 106 B receiver, 1919 April 12; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0573 -- Drawing no. 20,348-: Secondary switch / type 106 B receiver, 1919 April 18; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0574 -- Drawing no. 20,349-: Dasher / watermill freezer (1 3/4 Qt.), 1919 April 19; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0575 -- Drawing no. 20,350-: Top bar / watermill freezer (1 3/4 Qt.), 1919 April 18; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0576 -- Drawing no. 20,351-: Brace, rear tie / engine generator saddle, 1919 April 21; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0577 -- Drawing no. 20,352-: Brace front tie / engine generator saddle, 1919 April 21; 16.5 inches x 10.75 inches
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M&A 1278 7 Clark no. M 216 0578 -- Drawing no. 20,353-: Outer can / watermill freezer, 1919 April 22; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0579 -- Drawing no. 20,354-: Set of starting resistances / 1/2KW quenched multiple spark set, 1919 April 22; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0580 -- Drawing no. 20,355-: Loading coil, primary type 106 B receiver, 1919 April 25; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0581 -- Drawing no. 20,356-: Wall insulator / 1/2KW transmitter, 1919 April 22; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0583 -- Drawing no. 20,357-: Speed indicator / engine generator saddle, 1919 April 29; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0584 -- Drawing no. 20,358-: Wiring complete (assembly) / 1/2KW Q.M.S. transmitter, 1919 April 29; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0585 -- Drawing no. 20,359-: Outer can / 4 qt. watermill freezer, 1919 May 1; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0586 -- Drawing no. 20,360-: Top bar / watermill freezer (4 qt.), 1919 May 2; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0587 -- Drawing no. 20,361-: Support bottom / watermill freezer (4 qt.), 1919 May 1; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0588 -- Drawing no. 20,362-: Support top / watermill freezer (4 qt.), 1919 May 1; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0589 -- Drawing no. 20,363-: Protective condenser case / 1/2KW mule pack set, 1919 May 2; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0590 -- Drawing no. 20,364-: Starter transfer switch / 5KW 220 v. 2-phase transmitter, 1919 May 5; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0591 -- Drawing no. 20,365-: Coupling flange-engine / connecting shaft, 1919 May 9; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0592 -- Drawing no. 20,366-: Connecting shaft / engine generator saddle / mule pack set type M-1, 1919 May 12; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0593 -- Drawing no. 20,367-: Fly wheel / shaft governor / mule pack set / type M-1, 1919 May 14; 16.5 inches x 10.75 inches
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M&A 1279 1 Clark no. M 216 0594 -- Drawing no. 20,368-: Case / variable bridging condenser, 1919 May 13; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0595 -- Drawing no. 20,369-: Fan support / engine cart, 1919 May 16; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0596 -- Drawing no. 20,370-: Case - protective device / 1/2KW motor generator, 1919 May 21; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0597 -- Drawing no. 20,371-: Detector / type 10 GB receiver, 1919 May 22; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0598 -- Drawing no. 20,372-: Cover - protective device / 1/2KW motor generator, 1919 May 22; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0599 -- Drawing no. 20,373-: Canopy - protective device / 1/2KW motor generator, 1919 May 23; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0658 -- Drawing no. 20,429-: Panel / simple coupler / New Orleans, 1919 August 13; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0659 -- Drawing no. 20,430-: Top panel / double variometer, 1919 August 15; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0666 -- Drawing no. 20,437-: Tool box / engine cart, 1919 October 2; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0667 -- Drawing no. 20,438-: Spare box / instrument case, 1919 September 30; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0669 -- Drawing no. 20,440-: Mast parts erected / 70 ft mast / army cart set. Type C-3, 1919 September 16; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0670 -- Drawing no. 20,441-: Arrangement of masts and aerial / 40 ft. mast / Mule pack set. Type M-1, 1919 September 27; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0671 -- Drawing no. 20,442-: Mast parts erected / 40 ft mast / Mule pack set. Type M-1, 1919 October 3 [Blue stamp: unauthorized.] ; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0672 -- Drawing no. 20,443-: Wave length settings / primary coil 2KW radio army cart / set, type C-3, 1919 October 16; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0674 -- Drawing no. 20,445-: 5000 volt generator / Marion Mass. / Commutator dimensions, 1919 October 31 [Refer also to d.s.35077.] ; 16.5 inches x 10.75 inches
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M&A 1279 2 Clark no. M 216 0676 -- Drawing no. 20,447-: High speed transmitting key system, 1919 November 8; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0677 -- Drawing no. 20,448-: 40 ft. mast ground-ready for erection, 1919 November 12; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0678 -- Drawing no. 20,449-: 40 ft. mast erected, 1919 November 14; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0679 -- Drawing no. 20,450-: 70 ft mast erected, 1919 November 15; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0680 -- Drawing no. 20,451-: 70 ft mast on ground - ready for erection, 1919 November 15; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0681 -- Drawing no. 20,452-: Lining / receiver pocket / mule pack case / type M-1, 1919 December 3; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0682 -- Drawing no. 20,453-: Detachable curtain (R.H.) / front door / mule pack case / type M-1, 1919 December 3; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0683 -- Drawing no. 20,454-: Connection diagram / 2 KW transmitter type P-8 / receiver type 106 B, 1919 December 17 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0685 -- Drawing no. 20,456-: Dimensions of cases / 1918-1920 high power / receiving apparatus, 1920 July 2 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0686 -- Drawing no. 20,457-: Motor generator / Holtzer-Cabot size D1-2 / their drawing #32395 / used with prot. device #30658, 1920 August 2 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0687 -- Drawing no. 20,458-: Short wave condenser / 1/2KW 500~ panel set / type P-5, 1920 August 12 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0688 -- Drawing no. 20,459-: Diagram of transmitter circuit / 1/2KW 500 cycle radio transmitter / type 531, 1920 August 12; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0689 -- Drawing no. 20,460-: 1/2 KW transmitter / type 531 / assembly, 1920 August 13 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0690 -- Drawing no. 20,461-: Case / assembly & details / radio frequency transformer, 1920 August 27 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0691 -- Drawing no. 20,462-: Case / assembly & details / radio frequency transformer, 1920 September 4 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 3 Clark no. M 216 0692 -- Drawing no. 20,464-AA: Schematic wiring / diagram / uni-control receiver, 1920 October 8 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 4 Clark no. M 216 0693 -- Drawing no. 20,466-: Wiring diagram / 1/2KW transmitter / type no 531, 1920 December 9 [Roselle Park Works / General Electric Co.] ; 16.5 inches x 10.75 inches
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M&A 1279 4 Clark no. M 216 0694 -- Drawing no. D.S. 25,114: Changes in drilling of top panel drg. # 3814-G-1 / 2KW 500 cycle panel set / type P-8, 1920 March 1 [Pencil on tracing paper.] ; 16.5 inches x 10.75 inches
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M&A 1279 4 Clark no. M 216 0696 -- Drawing no. 2,068-D: C.W. 25 KW / Generators, 1912 May 8 [Pencil on tracing paper.] ; 18 inches x 10.75 inches
Clark no. M 216 0704 -- Drawing no. 2,598-D: [illegible]denser rack [illegible], 1912 November 26 [Pencil on tracing paper.] ; 17 inches x 11 inches
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M&A 1279 4 Clark no. M 216 0719 -- Drawing no. 2,554-C: Mast, No year October 18 [Pencil on tracing paper.] ; 13.5 inches x 12 inches
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M&A 1279 4 Clark no. M 216 0720 -- Drawing no. 2,555-C: Aerial inductance iron, undated [Pencil on tracing paper.] ; 13.5 inches x 11.5 inches
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M&A 1279 4 Clark no. M 216 0724 -- Drawing no. 3,062-C: Enclosing guards for Navy mot. gen.s / Crocker Wheeler., 1913 January 2; 10.25 inches x 9.75 inches
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M&A 1279 4 Clark no. M 216 0725 -- Drawing no. 3,192-C: Arrangement of apparatus / Ketchikan Station, 1914 May 2 [Pencil on tracing paper.] ; 14.5 inches x 12.5 inches
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M&A 1279 4 Clark no. M 216 0735 -- Drawing no. 4,470-C: Changes in U.F.Co type / radio panel for commercial set / 300 to 600 meters, 1916 May 29 [Note: These sets are to be made according to drawings 2,754F, 2,755F, 2,756F, 2,757F, 2,758F, 2,759D, 2,768G, 2,770G, 2,771G, 2,775F, 2,776F, and 2,787F, except for revisions shown here.] ; 14.75 inches x 12 inches
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M&A 1279 4 Clark no. M 216 0736 -- Drawing no. 4,471-C: Changes in U.F.Co type / radio panel for commercial set / 300 to 2000 meters, 1916 May 29 [Note: These sets are to be made according to drawings 2,754F, 2,755F, 2,756F, 2,757F, 2,758F, 2,759D, 2,768G, 2,770G, 2,771G, 2,775F, 2,776F, and 2,787F, except for revisions shown here.] ; 14.75 inches x 12 inches
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M&A 1279 4 Clark no. M 216 0738 -- Drawing no. B-1,191-D: Assembly & list of material of 2KW spark gap / type CL-311., 1917 August-September [F. Lowenstein, B'klyn, N.Y.] ; 15.75 inches x 10.5 inches
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M&A 1279 4 Clark no. M 216 0739 -- Drawing no. B-1,191-E: Assembly & list of material of 2KW spark gap / type CL-311., 1918 August-September [F. Lowenstein, B'klyn, N.Y. [nearly identical to M 216 0738, except has fewer entries in list of material.]] ; 15.75 inches x 10.5 inches
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M&A 1279 4 Clark no. M 216 07