Browse Items (78 total)

Photograph of a Learadio Model RCB receiver tuning unit, circa 1930s-1940s.

Photograph of a Learadio portable receiver, circa 1930s-1940s.Inscription: "Portable 2-band battery-operated receiver used thru-out WW2 by many USAF [personnel?] here and all over world."

Photograph of a Learadio radio compass tuning unit, circa 1930s-1940s.

Photograph of a Learmatic navigator, circa 1940s.Inscription: "Learmatic navigator combining directional gyro with adjustable [illegible] and automatic and/or manual loop [rotator?]."

Patent application for the Gyromatic Radio Compass submitted by William P. Lear, October 30, 1944. 24 typed pages.

Photograph of a Piper J-4A Cub Coupe aircraft equipped with a Lear Avia loop antenna, circa 1940.Inscription: "Lear Avia manual loop. 1940."

Photograph of the production line at the Lear Avia facility in Piqua, Ohio, circa 1943. Employees, predominantly women, work on device components at long work tables.Inscription on verso: "1943 -- Piqua. [illegible] Dept. View of production…

Photograph of Robert L. Drake, Chief Electrical Engineer of Lear Avia, working in his office, circa 1940s. Typed caption on verso: "R. L. Drake, Chief Electrical Engineer, in his office."Inscription on verso: "Drake in his own office."

Photograph of a swept antenna on the underside of a Fairchild 24 aircraft, circa 1939. A person, mostly out of frame, points to the antenna from the image's left side.Inscription: "First swept antenna on Fairchild 24. 1939."

Photograph of Sydney Nesbitt (left) presenting a Learadio Model APR-A portable receiver to Katherine Rawls Thompson, winner of the Alcazar Trophy Race, Miami, Florida, January 1941. An unidentified U.S. Marine Corps serviceman stands in the…