1978-03-23
1980-07-08
Gonzales, John
G03B 108
Patent
active
042114799
ABSTRACT:
A camera including a film advance mechanism having a film advance plunger which is mounted for reciprocal movement from a rest position to a depressed position for operating the film advance mechanism to move film along an exposure plane and coil it about a take up spool. A film metering finger connected to said film advance mechanism and movable from a retracted position on one side of the exposure plane to an extended position traversing the exposure plane. Film is advanced by depressing the plunger. When the metering finger senses a perforation in the film at a predetermined location, movement of the finger disables the film advance mechanism to prevent further film advancement, even though plunger movement may continue. This disabling is accomplished by separating two adjacent and substantially collinear members which connect the plunger to a ratchet drive mechanism that rotates a film take-up spool. The film advance mechanism is re-enabled as or after the shutter release button is depressed to expose the film.
REFERENCES:
patent: 3747494 (1973-07-01), Peters
patent: 3769891 (1973-11-01), Hackenburg et al.
patent: 3774513 (1973-11-01), Ettischer et al.
Gonzales John
Keystone Camera Corporation
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