Automatic photographic shutter control apparatus

Details Automatic photographic shutter control apparatus Automatic photographic shutter control apparatus

1975-06-03

1977-01-11

Hayes, Monroe H.

354261, 354265, G03B 908

Patent

active

040030679

ABSTRACT:
Camera exposure control apparatus utilizing an electronic timing circuit connected to an electromagnet for controlling, through a drive member, the movement of a shutter which opens and closes to establish an exposure interval. A latch, actuated by movement of the drive member to open the shutter, opens a switch to de-energize the electromagnet and moves into position to hold the drive member to prevent its movement to close the shutter during the time interval that the electromagnet is de-energized. Following a subsequent energization of the electromagnet the latch is released and the drive member moves to close the shutter.

REFERENCES:
patent: 3492931 (1970-02-01), Racki
patent: 3784291 (1974-01-01), Hirata

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