Stationary sprocket guard assembly

Details Stationary sprocket guard assembly Stationary sprocket guard assembly

1975-06-09

1976-05-25

Hayes, Monroe H.

Optics: motion pictures

With threading structure

352129, 226 82, 226 85, G03B 156

Patent

active

039588734

ABSTRACT:
A sprocket assembly for a motion picture projector and a method of threading and removing film from the sprocket assembly is disclosed. By selected configuration of the sprocket and the stationary sprocket guard, including aligner and keeper portions cooperating with the teeth of the sprocket, the film is inserted and removed by simply bending and lowering or twisting and lifting relative to the sprocket assembly.

REFERENCES:
patent: 1966857 (1934-07-01), Goldhammer
patent: 1969471 (1934-08-01), Mihalyi
patent: 2172812 (1939-09-01), Van Weenen
patent: 2205546 (1940-06-01), Stechbart
patent: 2639147 (1953-05-01), Fairbanks

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