Automatic stereoscope

Patent

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Details

G02B 2722

Patent

active

041584805

ABSTRACT:
An audio-visual device that combines synchronized programs of narration and music with direct viewing of illuminated 35mm stereoscopic transparencies presented in automatic progression. The device features four innovations in particular: 1. Endless-loop reels in which the stereo mounts themselves serve as the basic "hardware," requiring no belts, discs, frames, drums or cylinders for support, and simplified for expeditious removal and compact storage to solve the many problems of inventory and program change-over. 2. Jam-proof transmission for advancing slides intermittently, comprised of a sprocketed drive wheel and a 4-vane "paddle-wheel," with meshing cogs so spaced and positioned as to remain constantly "in gear," never "out of gear." 3. A tape playback system that compensates for variable differences in the speed of the viewer motor and the tape playback motor, by re-synchronizing itself at the beginning of each new cycle so that sight and sound coincide automatically no matter how often the cycle is repeated. 4. Expandable design for adding viewer outlets, when the objective is to serve groups of patrons disposed to see and hear the same performance at the same time, akin to an audience in a small movie theater. Comprising the basic component of this extension, a rotatable shaft is coupled to the main idler shaft in the unit, to carry an optional plurality of impellers and reels.

REFERENCES:
patent: 365256 (1887-06-01), Horton
patent: 963841 (1910-07-01), Whiting
patent: 2296765 (1942-09-01), Brost
patent: 2679705 (1954-06-01), Rainous
patent: 2897721 (1959-08-01), Cohn et al.
patent: 3027802 (1962-04-01), Larson
patent: 3245156 (1966-04-01), DeBloois et al.
patent: 3484160 (1969-12-01), Glass et al.
patent: 3731999 (1973-05-01), Vantre

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