Motion picture apparatus

Details Motion picture apparatus Motion picture apparatus

1981-08-19

1983-09-27

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With single frame operation

352137, G03B 2138

Patent

active

044065280

ABSTRACT:
A motion picture apparatus is provided which comprises a rotary disc shutter having a shutter sector and actuated by an electric drive device. A claw mechanism is controlled by the electric drive device and provides for transport of a film. An electromagnetic solenoid provides for stopping the film in position. A plunger for the solenoid is provided for disengaging the claw transport mechanism after a frame transport phase upon generation of an appropriate signal. A position signal generator provides a shutter position signal depending on the position of the shutter sector and a marking signal generator provides a signal depending on the detection of a marking placed on the film. The position signal generator is connected to a first input of an AND gate and the marking signal generator is connected to a second input of the AND gate. The output of the AND gate is connected to the solenoid.
The apparatus and a corresponding method provide for stopping a film without interference in proper position.

REFERENCES:
patent: 3368863 (1968-02-01), Mueller
patent: 3432228 (1969-03-01), Hellmund
patent: 3788736 (1974-01-01), Oulevay et al.
patent: 3851959 (1974-12-01), Kreutze et al.
patent: 3958872 (1976-05-01), Roth

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