×

Photographic camera control circuitry

  • US 4,161,355 A
  • Filed: 02/03/1978
  • Issued: 07/17/1979
  • Est. Priority Date: 02/14/1977
  • Status: Expired due to Term
First Claim
Patent Images

1. A photographic camera control circuitry comprising:

  • a light measuring circuit for generating a light representative signal, said light measuring circuit including a photocell receiving light of the scene to be photographed, through a camera objective and a diaphragm aperture;

    storing means for storing said light representative signal;

    storage switch means for connecting and disconnecting said storing means to or from said light measuring circuit;

    exposure time control means for initiating shutter closing at a time commensurate with the signal stored in said storing means;

    a first control circuit for energizing said light measuring circuit and actuating said storage switch means to connect said storing means to said light measuring circuit;

    a second control circuit for energizing said exposure time control means and for deactuating said storage switch means to disconnect said storing means from said light measuring circuit;

    delay means for generating an output after a lapse of a given time period from the actuation thereof;

    electromagnetic means for actuating a camera mechanism to initiate an exposure sequence;

    a third control circuit for energizing said electromagnetic means;

    a first switch means for actuating said first control circuit; and

    second switch means for actuating said first control circuit and said delay means, said delay means being connected with said second and third control circuits so that both said circuits are actuated in response to the output of said delay means.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×