Sync contact switch for movie camera

Details Sync contact switch for movie camera Sync contact switch for movie camera

1974-07-08

1976-03-23

Hix, L. T.

Optics: motion pictures

With sound accompaniment

Picture and sound synchronizing

352 19, 352 20, 352 25, 352 92, G03B 3104

Patent

active

039457184

ABSTRACT:
A switch adapted to cooperate with the pull-down claw of a silent movie camera for transmitting an electrical signal each time a frame of movie film is advanced past the shutter of the camera includes an insulating base adapted to be positioned within the film receiving compartment of a movie camera so as to fit around the film gate, the base having a grounding contact arm engaging the gate so as to be grounded through the camera and a contact finger insulated from the gate and disposed for intermittent engagement with the reciprocating pull-down claw which serves to close the switch each time a frame of film is advanced past the shutter.

REFERENCES:
patent: 3515470 (1970-06-01), Browder

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