Shutter release mechanism for cinecamera

Details Shutter release mechanism for cinecamera Shutter release mechanism for cinecamera

1977-10-18

1979-12-04

Hayes, Monroe H.

Optics: motion pictures

Camera and/or projector drive mechanisms

With starting and/or stopping means

G03B 100

Patent

active

041769244

ABSTRACT:
A control circuit for an electromagnetic shutter release mechanism for cinecamera controls a low level holding current at a predetermined constant level so that a shutter stopper which has been shifted in shutter operating position by an electromagnet energized by an initial high level actuating current is held in that position irrespective of a voltage variation of a D.C. power source.

REFERENCES:
patent: 3790264 (1974-02-01), Heinrich
patent: 4006978 (1977-02-01), Pustka

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