Accession Number: 2007.33.6
Description: Machined aluminum case with a black textured enamel finish; turned wooden handle between two brackets on top; brackets for straps, two riveted to back, one riveted in front of handle; sliding toggle on/off switch on top to right (proper) of handle; two machined aluminum lens housings on front of case, stacked with smaller lens above larger; rotary adjustment screw on lower left side of case; drawbolt type latch on lower left (unknown purpose); piano hinged door on right secured by drawbolt; two battery compartments on interior, first is removable Bakelite (Cambridge Instrument Co.) case which holds one type A cylindrical battery and one type B "Minimax B Battery for hearing aids (dated Oct 1947)", second is open box with two type Bs as described above; workings inside feature small "Magnac" electric motor, and capacitor from Cornell Dubilier with patent# 1783949; aluminum case for light bulb stamped with serial# 4, which is also marked on several of the gears; fuse case mounted inside door, connected to plug which insures that device will not function with the door open; two-wire remote cable is wired into fuse circuit, runs out hole in base to two prong plug.
Height: 9.5
Width: 3.25
Depth: 7
Date Made: ca. 1947
Collection: AER O&M Division C. Warren Bledsoe Archives
History/Provenance: AER O&M Division C. Warren Bledsoe Archives
Credit Line: Gift of Association for Education and Rehabilitation of the Blind and Visually Impaired
Subjects: Orientation & Mobility Electronic Travel Aids
Dimension Notes: overall
Made: United States. Army. Signal Corps; Cranberg, Lawrence
Material: Aluminum, Bakelite, wood, glass
Updated: 04/29/2014
