Motor control device for sound motion picture camera

Details Motor control device for sound motion picture camera Motor control device for sound motion picture camera

1977-08-05

1979-04-10

Adams, Russell E.

Optics: motion pictures

Camera and/or projector drive mechanisms

With speed regulation or selection

352 29, 352 30, G03B 2148

Patent

active

041485700

ABSTRACT:
In a sound motion picture camera of the type adapted for selective use of a sound magazine and a silent magazine and having separate drives for intermittent advancement and constant-speed transport of the film respectively on an exposure station and a sound recording station, the speed of rotation of a motor for the intermittent film drive is adjusted in accordance with the preselected value of picture frame speed when the used magazine is of the silent type, and varied as taking either of two discrete values faster and slower than the normal picture frame speed, depending upon whether a slack loop of the film formed between the exposure station and the sound recording station is decreased or increased from the predetermined length thereof, when the used magazine is of the sound type.

REFERENCES:
patent: 3825329 (1974-07-01), Heinrich et al.
patent: 3942882 (1976-03-01), Saito
patent: 3957363 (1976-05-01), Hayashi et al.
patent: 4003643 (1977-01-01), Freudenschuss et al.
patent: 4021104 (1977-05-01), Ito

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