Charles A. Rosencrans (1908-1991) was an RCA engineer who specialized in radio transmission. His notebooks largely consist of fragmentary handwritten notes from both his career at RCA and from his studies in electrical and mechanical engineering at Lehigh University.

The Leeds & Northrup Company thrived throughout the twentieth century as a premier manufacturer of precision measuring and scientific equipment. The bulk of the Leeds & Northrup Electrical Power Systems records come from three employees, whose work at Leeds & Northrup spanned from 1928-1981: W. Spencer Bloor (1918-2002), Nathan Cohn (1907-1989), and S. Byron Morehouse. All worked within the Instrumentation and Controls for Electric Power Application Division. The records include papers, presentations, correspondence, memos, blueprints, and other materials relating to the development of a national electrical power grid in the United States. Technological and commercial developments in automatic electric power generation control, stabilization of energy load across regions, and problems of interconnection feature prominently in these materials.

Elmer Sperry (1860-1930) was one of America’s electric pioneers. He founded the Sperry Gyroscope Company in order to develop, manufacture, and market marine gyrostabilizing devices. The papers document Sperry's research and development work and entrepreneurial activities.

For over fifty years the Radio Corporation of America (RCA) was one of the country's leading manufacturers and vendors of radios, phonographs, televisions, and a wide array of consumer and military electronics products. The Radio Corporation of America (RCA) and the Victor Talking Machine Company merged in 1929 becoming the RCA Victor Company in 1930. This merger allowed RCA to consolidate the research, engineering, manufacturing and sales of RCA products. This collection consists of negatives, a majority of which feature sound and television equipment manufactured by RCA. These images include phonographs, radios, radio-phonograph combinations, records, speakers, amplifiers, microphones, facsimile machines, televisions, equipment involved in the transmission and reception of television and radio waves, radio equipment created for use by government agencies and motion picture equipment.

Harry F. Brown (1886-1980) was an electrical engineer, and his entire career was devoted to railroad electrification. The collection consists of personal letters received by Brown, primarily from his father, Harry B. Brown, secretary of the McLagon Foundry Company in New Haven, his mother, his sister Grace, and his uncle Charles S. Brown, professor of mechanical engineering at Vanderbilt University.

The Kaehni brothers, William "Bill" L. Kaehni (1895-1950) and Francis "Frank" J. Kaehni (1897-1986) were electronics engineers, inventors, and entrepreneurs. The brothers invented radio transmitters, navigational devices for airplanes and ships, transistorized car ignitions, and heat control systems. They also built and installed public address systems. This small collection primarily consists of the Kaehni brothers' class notes from courses taken at the Case School of Applied Science (now folded into Case Western Reserve University). The notes are most likely Bill Kaehni's, but could also be Frank Kaehni's, as they are mostly undated. Of significance is a bound biography written in 1998 by David C. Barnett using documents from the Kaehni family and firsthand accounts from their sister, Marie Kaehni, who provides her own memories in the afterword.

This collection contains papers from Louis F. Moose from his early days as a student at the University of California, Berkeley, to his retirement from Bell Laboratories, Allentown, Pennsylvania, as an electrical engineer and department head. They date from 1928 with the bulk of the documents from 1942 to 1982 covering his work and activities at the Massachusetts Institute of Technology and Bell Laboratories.

Throughout his career, Mr. Moose was involved with the early research and development of magnetrons/microwave tubes used in radar for military use and for Bell Systems applications.

The Marconi Wireless Telegraph Corporation of America was founded in 1899 as the American branch of Guglielmo Marconi’s (1874-1937) 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.

Paul J. Ganahl (1916-2002) was an electrical engineer who served in the United States Air Force. This item is a manuscript diary kept by Ganahal between January 2, 1953, and December 31, 1953, while working as an electrical engineer performing aerial photography tests for the United States Air Force in California and New Mexico. The daily entries are bullet lists of film rolls develped, problems found, people met with or spoken to, flight test details, and places traveled. The diary provides technical information about the develpment of reconnaissance photography, engineering challenges, and project team communication.

Simon Saretzky (1908-2007) spent his career as an engineer, and was co-founder of IMC Magnetics Corporation, serving as president from 1951 to 1978. He became known as "the father of small motors." This small collection documents Saretzky's career at IMC Magnetics, as well as previous jobs, including his work as an engineer with Holtzer-Cabot Electric Company during World War II. There is a small amount of material related to Cyclohm Corp. in the late 1940s. This collection would be of interest to those researching electrical engineering, the development of small motors, or immigrant entreprenuers.

The Society for the Promotion of Engineering Education, which was founded in 1893 and became part of the American Society for Engineering Education in 1946, was a professional society of engineering school deans, professors, practicing engineers, and industry executives. During the 1930s and 1940s, Dugald C. Jackson (1865-1951), Professor of Electrical Engineering at MIT, served as executive director. MIT president Karl Compton (1887-1954) and Gerard Swope (1872-1957) from the General Electric Company were active members. This collection of correspondence consists largely of letters between Jackson, Swope, and Compton, which document their efforts to shape the curriculum at major engineering schools.