Camera shutter with thermal actuator

Details Camera shutter with thermal actuator Camera shutter with thermal actuator

1990-02-12

1991-05-21

Mathews, A. A.

354457, 354250, G03B 908

Patent

active

050179543

ABSTRACT:
An electrically operated shutter for photographic apparatus, particularly cameras, wherein a movable element for blocking and unblocking the light path to the film is operated by the bending and unbending of a bimetallic element upon heating by electric current and subsequent cooling, preferably with the use of heat sink means moveable into heat transferring relation with the bimetallic element to hasten cooling.

REFERENCES:
patent: 3110824 (1963-11-01), Flanagan
patent: 3883885 (1975-05-01), Orlando
patent: 4190336 (1980-01-01), Frank et al.
patent: 4664493 (1987-05-01), Takagi

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