Exposure control with piezoelectric latch control

Details Exposure control with piezoelectric latch control Exposure control with piezoelectric latch control

1977-11-14

1979-07-31

Gellner, Michael L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310332, 354234, G03B 708, H01R 3908

Patent

active

041628322

ABSTRACT:
A camera is disclosed which includes a shutter blade magnetically latchable in an open position to permit scene light to pass through a camera aperture, flexible piezoelectric energy converter, such as a Bimorph element, movable upon being subjected to an applied voltage to push the shutter blade away from the magnet, and a light responsive electronic circuit for applying a voltage to the piezoelectric converter after an exposure duration in accordance with the level of scene illumination.

REFERENCES:
patent: 3110824 (1963-11-01), Flanagan
patent: 3205799 (1965-09-01), Burgarella
patent: 3980908 (1976-09-01), McClintock

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