Claw feed mechanism

Details Claw feed mechanism Claw feed mechanism

1982-09-30

1983-09-06

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With film engaging claws reciprocally driven to engage film

226 62, G03B 122

Patent

active

044025815

ABSTRACT:
A claw feed mechanism for a motion picture camera for intermittently advancing film for exposure. A first end of an elongated, light-weight film feeding pin is pivotally coupled to a first crank. The film feeding pin includes an advancing taper at the second end thereof for engaging with and advancing the film. A second crank includes a guide for guiding the film feeding pin. The first and second cranks are mutually eccentrically driven so that the film feeder pin reciprocates with respect to the guide, while the film feeder pin and the guide synchronously pivot so that the advancing taper on the film feeder pin defines an elliptical path thereby intermittently engaging with and advancing the film for exposure.

REFERENCES:
patent: 714845 (1902-12-01), White
patent: 1850411 (1932-03-01), Mitchell
patent: 1850955 (1932-03-01), Fear
patent: 1930723 (1933-10-01), Mitchell
patent: 1954885 (1934-04-01), Mitchell et al.
patent: 2124322 (1938-07-01), Tondreau
patent: 2179630 (1939-11-01), Hillman
patent: 2475099 (1949-07-01), Jonson
patent: 3587960 (1971-06-01), Gerb

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