Film advance mechanism

Details Film advance mechanism Film advance mechanism

1986-07-21

1987-12-08

Mathews, A. A.

354206, G03B 102

Patent

active

047115459

ABSTRACT:
In a film advance mechanism for perforated film, locking elements are provided to guarantee the image position for each exposure. They block the film transport sprocket against further movement after completion of each full film advance carried out via the camera winding mechanism. In addition, the mechanism releases the film transport sprocket from the blocked condition on completion of the camera shutter cycle.

REFERENCES:
patent: 2241122 (1941-05-01), Drotning
patent: 2838984 (1958-06-01), Lareau et al.
patent: 3486431 (1969-12-01), Ettischer
patent: 4209246 (1980-06-01), Nomura et al.
patent: 4339189 (1982-07-01), Nakano

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