Browse Items (14 total)

[Chassis of Model L Lear-o-Scope]
Photograph of the chassis of a Model L Lear-o-Scope, circa 1931-1939. The verso inscription, which was written by William P. Lear, describes the development of the device.Inscription on verso: "Here is chassis of Model L Lear-o-Scope. The layout was…

[Model L Lear-o-Scope and loop antenna]
Photograph of a Model L Lear-o-Scope and loop antenna, circa 1936-1939. The verso inscription, which was written by William P. Lear, describes the device and its development.Inscription on verso: "Note left crank changed bands and moved mash on dial…

[Men working with Lear devices and a loop antenna]
Photograph of three men working with Lear devices and a loop antenna, circa 1931-1939.

[Lear Developments radio receiver]
Composite photograph of a Lear Developments radio receiver, showing views of the internal components and the external case, circa 1931-1939. The caption notes that this device was developed for the U.S. Department of Commerce.Typed caption on verso:…

[Learadio Model R-3 aircraft receiver, antenna, and peripheral components]
Photograph of a Learadio Model R-3 aircraft receiver, shielded loop antenna, and peripheral components, circa 1931-1939. The caption describes the device's development.Typed caption on verso: "P. This loop was metallized in an attempt to shield it,…

[Learadio Model R1 receiver and headphones]
Photograph of a Learadio Model R1 receiver and headphones, circa 1931-1939. The device is on scale to demonstrate its light weight. The caption describes the device's development and specifications.Typed caption on verso: "C. A Model R-1…

[Assorted Learadio devices]
Photograph of assorted Learadio devices, circa 1935. Pictured devices include the Model R-3 aircraft receiver, T-30 radio unit, and a shieled loop antenna.Inscription on verso: "Lear equip / circa 1935."

[Learadio T-30 and R-3 equipment]
Photograph of a Learadio T-30 R3 radio system and assorted components, circa 1935-1939. The inscription notes that this equipment was developed especially for pilots operating in Alaska.Inscription: "Learadio T-30 R3. Saved many lives and much money…

[Lear Developments loop antenna]
Photograph of a Lear Developments loop antenna with a transparent plastic shield, circa 1935-1939.Inscription on verso: "Loop antenna. Winner of national plastics award in 1935. First stream lined housing for loop antennae."Stamped on verso: "Please…

[Loop antenna in workshop]
Photograph of a shielded loop antenna in a workshop, circa 1931-1939.
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