Film advance and metering mechanism for cameras

Details Film advance and metering mechanism for cameras Film advance and metering mechanism for cameras

1975-09-04

1977-02-22

O'Connor, Edna M.

354213, G03B 122

Patent

active

040094782

ABSTRACT:
A still camera for use with film having a row of perforations, one for each film frame, has a manually operated film advancing mechanism and a metering mechanism for selectively disabling the advancing mechanism. A lock mechanism retains an intermediate gear at the position where the gear transmits the movement of the manual film advancing member to a film wind-up gear for the film transportation. A sensing pawl releases the intermediate gear and disconnects the same from a transmission train between the manual member to the film wind-up gear to disable the film transportation when the sensing pawl detects a perforation and is slightly moved thereby.

REFERENCES:
patent: 3820143 (1974-06-01), Keiner
patent: 3852784 (1974-12-01), Stoneham
patent: 3906530 (1975-09-01), Oshima

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