Timed piezoelectric shutter control for cameras

Details Timed piezoelectric shutter control for cameras Timed piezoelectric shutter control for cameras

1977-07-18

1978-10-10

Gellner, Michael L.

Electrical generator or motor structure

Dynamoelectric

Rotary

354234, 310332, 310339, G03B 708, H01V 4110

Patent

active

041199790

ABSTRACT:
A camera is disclosed which includes a shutter latchable in an open position to permit scene light to pass through a camera aperture, an electronic circuit for producing a sudden change in voltage after an exposure period determined by the level of scene luminance, and a piezoelectric energy conversion device, such as a bimorph, which is responsive to such voltage change to rapidly change shape and thereby unlatch the shutter and allow it to move toward a closed position.

REFERENCES:
patent: 3110824 (1963-11-01), Flanagan
patent: 3500451 (1970-03-01), Yando
patent: 3636840 (1972-01-01), Harvey et al.

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