Optics: motion pictures – Camera and/or projector drive mechanisms
Patent
1978-01-05
1979-07-31
Hayes, Monroe H.
Optics: motion pictures
Camera and/or projector drive mechanisms
352130, 352 72, 352 35, 242186, 242205, G03B 100
Patent
active
041628292
ABSTRACT:
A yieldably resilient shock absorber is provided, which is disposed in driving relationship between a pair of gears in a photographic apparatus drive system. The yieldably resistant shock absorber is confined within an annular chamber or channel defined by complementary structure of the two gears and is adapted to absorb forces due to sudden stoppage of the film strip or to resistance to movement of the film strip by compressing the resilient shock absorber member within the confining channel. Upon cessation of the forces imposed upon the yieldable resilient shock absorber, frictional engagement between the outer surfaces of the deformed shock absorber member and the confining walls defining the channel result in a controlled release of the absorbed energy.
REFERENCES:
patent: 2196358 (1940-04-01), Heinisch
patent: 2912178 (1959-11-01), Schuyler
patent: 3514197 (1967-11-01), Sho
patent: 3643469 (1972-02-01), Enomoto
patent: 3719335 (1973-03-01), Kurasawa
patent: 3920318 (1975-11-01), Frezzolini
patent: 3947187 (1976-03-01), Murray
patent: 4087165 (1978-05-01), Pasturczak
Cook Gerald H.
Ruck Bernard W.
Goettel, Jr. Frederick A.
Hayes Monroe H.
Polaroid Corporation
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