Film advance-flash interlock mechanism

Details Film advance-flash interlock mechanism Film advance-flash interlock mechanism

1975-03-10

1976-05-04

Hix, L. T.

354142, G03B 1503, F21K 502

Patent

active

039552055

ABSTRACT:
A mechanism for energizing a piezoelectric firing spring, cocking a camera shutter drive mechanism and advancing film within the camera is adapted to prevent short-stroke operation of the camera during movement of the piezoelectric firing spring to its fully energized position. The mechanism comprises a blocking member that is biased toward a blocking position wherein the blocking member prevents return of the film advance mechanism to its rest position. Movement of the piezoelectric firing spring to its fully energized position moves the blocking member from its blocking position.

REFERENCES:
patent: 3672813 (1972-06-01), Horton
patent: 3677153 (1972-07-01), Bok
patent: 3690236 (1972-09-01), Ettischer
patent: 3735679 (1973-05-01), Winkler

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