Device for photographic cameras with focal plane shutter

Details Device for photographic cameras with focal plane shutter Device for photographic cameras with focal plane shutter

1980-02-04

1981-12-01

Griffin, Donald A.

354281, G03B 1702, G03B 1726

Patent

active

043033288

ABSTRACT:
The invention relates to an automatic device for protecting the focal plane shutter of a camera when the camera is open. The film magazine of the camera, alternatively the camera back, is sensed by a member disposed in the camera body and directly or preferably indirectly controlling the shutter electronically. When the camera is opened, the sensing member emits a control pulse, which releases the opening part of the shutter. The opening and closing parts of the shutter then are located on both sides of the film gate of the camera where they are protected against damage. When the camera again is closed, the opening part of the shutter again must be cocked. Alternatively, also the closing part of the shutter can be released by a control pulse released when the camera is being closed. The protective device is lockable. (FIG. 2).

REFERENCES:
patent: 3491671 (1970-01-01), Engeldrum
patent: 3724352 (1973-04-01), Shimomura
patent: 4017877 (1977-04-01), Powers

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