Shutter mechanism for a camera

Details Shutter mechanism for a camera Shutter mechanism for a camera

1987-08-20

1988-07-26

Gellner, Michael L.

354230, G03B 708, G03B 908

Patent

active

047604204

ABSTRACT:
A shutter mechanism for a camera comprises overlapping plates which are pivotally mounted and connected by a pin sliding in slots so that the plates move in unison. Springs bias the plates to an overlapping position, covering a hole in the camera body which leads to a lens. The plate is struck by a lever which urges the plates against springs causing them to pivot away, until the lever strikes a stop at which point the plates still overlap sufficiently to cover the hole. After the lever strikes the stop the plates continue to move under their own momentum to open up an aperture bounded by the edges.
A magnetic control plate with pawls is attracted towards the overlapping plates by an electromagnet so that the pawls engage racks on the plates to arrest the plates at a particular aperture setting. The electromagnet is switched off to allow plate to return under the action of spring, relesing the plates which close the aperture under the action of springs.

REFERENCES:
patent: 3233531 (1966-02-01), Fairbank

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