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Shutter mechanism

  • US 3,973,269 A
  • Filed: 02/26/1975
  • Issued: 08/03/1976
  • Est. Priority Date: 02/26/1974
  • Status: Expired due to Term
First Claim
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1. An electrically controlled shutter device for a photographic camera, the shutter device comprising:

  • at least one shutter element mounted for movement between two rest positions for opening and closing a light admitting aperture of the camera;

    drive means operatively associated with said shutter element for causing the movement of said shutter element between its rest positions;

    external trigger control means for initiating an opening and closing of said aperture for an exposure operation and supplying electrical signals indicative of such operation;

    position monitoring means associated with said shutter element for providing a signal in dependence upon said shutter element being located at a predetermined position;

    braking means operatively associated with said shutter element; and

    ,control means coupled to an output of said position monitoring means for controlling the operation of the shutter device as a function of signals provided by said position monitoring means and as a function of signals from said external trigger control means, and said control means being operatively coupled to said braking means for selectively controlling its operation as a function of a signal provided by said position monitoring means upon movement of said shutter element into a predetermined position.

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