Film winding safety mechanism

Details Film winding safety mechanism Film winding safety mechanism

1980-11-17

1982-06-01

Griffin, Donald A.

354275, G03B 100, G03B 1726

Patent

active

043324487

ABSTRACT:
A film winding safety mechanism is disclosed in which film metering and shutter-actuator mechanisms are driven from a sprocket wheel which is driven by film only when the film is properly loaded in a camera to be advanced by rotation of a take-up spool. The safety mechanism is disabled when no cartridge is installed in a manner such as to permit test operation of the camera shutter.

REFERENCES:
patent: 2241122 (1941-05-01), Drotning
patent: 3470803 (1969-10-01), Fukuoka et al.
patent: 3486431 (1969-12-01), Ettischer
patent: 3603233 (1971-09-01), Kremp et al.
patent: 3685414 (1972-08-01), Good

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