Rectangular black metal case with front panel. Panel has tuning dial at center with three rows. Also has tuning selection knob and vol. knob. Has ADF/ANT switch. Tester button at upper right. At bottom of panel "Lear ADF-12E." Holes and flat prongs…
Patent documents for an airfoil control apparatus responsive to aircraft speed (patent no. 2,696,355), filed by Thorvold H. Larson, John D. Mayer, Calvin E. Pfafman, William H. Cook Jr., and John F. Kirkbride, December 7, 1954. Includes a written…
Patent documents for an airplane flap control mechanism (patent no. 2,620,147), designed by Van B. Butler and William H. Cook, Jr., December 2, 1952. Includes a written description of the mechanism, diagrams, and a list of related patents. Seven (7)…
Patent documents for an airplane yaw damper (patent no. 2,672,307), designed by William H. Cook, Jr., Calvin E. Pfafman, and George S. Schairer, March 16, 1954. Includes a written description of the mechanism, diagrams, and a list of related patents.…
Amplifier with autopilot component. The two components are solidly adhered and bolted together. Both components constructed in black metal with silver steel screws. On the bottom component there are wires laced around the tops of screws and a…
Bracket constructed out of black metal into a square shape. A silver cylindrical gear encased in black metal has been drilled into the front of the base. There are two plaques adhered to the interior of the object with information about its…
Radio compass constructed out of black metal with a glass circular face with yellow numbering. An airplane and "Lear Orienter" is etched in white on top of the glass covering. The back portion of the compass is black cylindrical metal. In addition,…
Radio compass constructed out of black metal with a glass circular face. A sticker of an airplane and "Lear Orienter" is placed on top of the glass covering. The compass is embedded into a square piece of brown wood with a lacquer finish. There is a…
Radio compass constructed out of a black metal case with a round face. Divided compass on front with sectioned numbers in beige. Silhouette of plane with "Learmatic." Plug at back. 7 pin connection. There is a black and silver label adhered to the…
Compass controller constructed out of a black metal rectangular prism encasing with a black metal face with gold lettering etched in. The compass and other dials are on the face of the object. On the back is a manufacturer label with the text,…