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Charles A. Rosencrans lab notebooks

1929-1959
 Collection
Accession: 2549

Abstract

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.

Dates

  • 1929-1959

Creator

Extent

0.4 Linear Feet

Historical Note

Charles A. Rosencrans (1908-1991) was an RCA engineer who specialized in radio transmission. Born December 18, 1908, in Orange County, New York, Rosencrans graduated from Lehigh University in 1931 with a Bachelor of Science in Electrical Engineering and, two years later, received a Master’s in Mechanical Engineering from the same institution.

In 1934, Rosencrans received a position with the RCA Manufacturing Company in Camden, New Jersey, as an engineer in transmitter development. He filed his first U.S. patent application for an inverse feedback amplifier in 1939, and was granted the patent three years later. In 1947, he became a member of the TV Terminal Equipment Engineering Group, which specialized in the development of TV microwave relay equipment. In 1951, he was granted a patent for an Antenna Switching System, a means for electrically isolating receivers from transmitters with common rather than separate antennas. Throughout the 1940s and 1950s, Rosencrans patented several other inventions in the field of radio transmission, receiving over eleven patents total throughout his career. He died September 29, 1991, in Haddonfield, New Jersey.

Arrangement

Arranged alphabetically by document type.

Scope and Content

Charles A. Rosencrans’s lab 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 notes are highly technical in nature, and are mostly confined to his work with operating radio transmitters and receivers with a common antenna system, which culminated in his invention of the Antenna Switching System.

Included with some of the notes are schematics and diagrams of transmitter monitors, receivers, and amplifiers. Rosencrans’s various U.S. patents are included, along with patent disclosure forms submitted to RCA. Furthermore, incomplete notes from his coursework at Lehigh University not only contain information on electrical engineering, but also include notes on sociological perspectives commonly taught in the early 1930s. Lastly, there are certificates from Rosencrans's involvement with the Lehigh University Reserve Officers Training Corps.

Access Restrictions

No restrictions on use.

Language of Materials

English


Additional Information

Related Names

Creator

Finding Aid & Administrative Information

Title:
Charles A. Rosencrans lab notebooks
Status:
Author:
Clayton J. Ruminski
Date:
2018
Description rules:
Describing Archives: A Content Standard
Language of description:
English
Script of description:
Latin

Repository Details

Repository Details

Part of the Manuscripts and Archives Repository

Contact:
PO Box 3630
Wilmington Delaware 19807 USA
302-658-2400