Browse Items (13 total)

[William P. and Moya Olsen Lear Papers, Box 1, Folder 15; Box 209, Folder 1 - "Radio guidance system and blind approach system (WPL/30-1)," 1935 June - 1944 November]
Items from Box 1, Folder 15 and Box 209, Folder 1 of the William P. and Moya Olsen Lear Papers, June 1935 to November 1944. Contains drafts, notes, and technical drawings for the radio guidance system and blind approach system (WPL/30-1) patent.…

[William P. and Moya Olsen Lear Papers, Box 4, Folder 3 - Learadio AMRL-1 marine radio direction finder, Learadio compass, Learadio T30 aircraft transmitter, Learadio R3 aircraft receiver, 1937-1938]
Items from Box 4, Folder 3 of the William P. and Moya Olsen Lear Papers, circa 1937-1938. Contains an advertisement for the Learadio Compass, an advertisement for the Learadio AMRL-1 Marine Radio Direction Finder, and a brochure for Learadio…

[William P. and Moya Olsen Lear Papers, Box 4, Folder 6 - "Learadio Airport Localizer (L-P-2)", 1939 September - October]
Items from Box 4, Folder 6 of the William P. and Moya Olsen Lear Papers, September to October 1939. Folder contains assorted items related to the Learadio Airport Localizer (L-P-2), including summaries, correspondence, diagrams, sketches, a clipping,…

[William P. and Moya Olsen Lear Papers, Box 4, Folder 30 - "Descriptive specifications of Learadio Lear-O-Scope Model LC 100 Radio Compass Direction Finder," circa 1931-1939]
Items from Box 4, Folder 30 of the William P. and Moya Olsen Lear Papers, circa 1931-1939. Contains two reports related to the Learadio Lear-O-Scope Model LC 100 Radio Compass Direction Finder.

[William P. and Moya Olsen Lear Papers, Box 18, Folder 1 - "Radio automatic guidance system (Case 31-3) and loop antenna system (Can 8-1)," 1940-1943]
Items from Box 18, Folder 1 of the William P. and Moya Olsen Lear Papers, circa 1940-1943. Contains a patent application and other documents related to the Radio Automatic Guidance System (Case 31-3) and Loop Antenna System (Can. 8-1), as well as a…

[William P. and Moya Olsen Lear Papers, Box 18, Folder 2; Box 200, Folder 2 - "Radio direction finding system (Case 20-1)" -- patent application [RM files], 1940-1943]
Items from Box 18, Folder 2 and Box 200, Folder 2 of the William P. and Moya Olsen Lear Papers, circa 1940-1943. Contains documents and drawings related to the patent application of the radio direction finding system (Case 20-1). 24 total items.

[William P. and Moya Olsen Lear Papers, Box 17, Folder 1; Box 209, Folder 2 - "Directional radio system (Case 17-2)" -- patent application [RM files], 1940]
Items from Box 17, Folder 1 and Box 209, Folder 2 of the William P. and Moya Olsen Lear Papers, circa 1940. Contains patent applications, technical drawings, notes, and photographs related to the directional radio system. Many of the documents were…

[Douglas DC-3 instrument panel with Learadio ADF 8]
Photograph of a Douglas DC-3 instrument panel with a Learadio ADF 8 automatic direction finder, circa 1940s. The direction finder and two gauges are circled and numbered. Inscription on verso: "Copy of instrument panel (Chicago and [illegible]…

[Learadio automatic direction finder]
Photograph of a Learadio automatic direction finder, circa 1940.Inscription: "Manual loop antenna rotator and directional indicator. 1940."

[Learadio panel assembly]
Composite photograph of Learadio panel assembly, showing side and front views, circa 1940s-1950s. Individual components include a fixed antenna tuning unit, trasmitter, automatic direction finder, and control unit.Caption: "Front view / NA-44 /…
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