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Photographic film wind-up and shutter charge mechanism

  • US 4,222,649 A
  • Filed: 02/17/1978
  • Issued: 09/16/1980
  • Est. Priority Date: 02/17/1977
  • Status: Expired due to Term
First Claim
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1. A camera comprising a guide member having a hollow recess opening out of said guide member;

  • fastening member receiving means;

    a film wind-up and shutter charge mechanism operable to feed a film past an exposure station subsequent to exposure of the film and having a coupling member;

    signal means having a movable contact movable in response to termination of exposure from a first position outside said hollow recess to a second position in said hollow recess subsequent to termination of exposure;

    a camera drive unit having;

    a fastening member receivable in said fastening member receiving means to fasten said drive unit onto said camera,a single positioning element receivable in said hollow recess in said guide member when said fastening member is received in said fastening member receiving means for acting together with said fastening member for positioning said camera drive unit relative to said camera, said single positioning element having an electrically conductive member capable of contacting said movable contact when said positioning element is received in said hollow recess in said guide member and when said movable contact moves to its second position,a drive mechanism couplable with said coupling member when said fastening member and said positioning element are received in said fastening member receiving means and said hollow recess in said guide member, respectively, for driving said film wind-up and shutter charge mechanism, andan electric circuit connected to said drive mechanism and having an input connected to said conductive element of said positioning element and actuated for actuating said drive mechanism in response to the contact of said conductive member with said movable contact; and

    a stop member engageable with said film wind-up and shutter charge mechanism to prevent a film wind-up and shutter charge action at least during the period of exposure and means for disengaging said stop member from said film wind-up and shutter charge mechanism subsequent to termination of exposure, and wherein said stop member is associated with said signal means for moving said movable contact from said first to said second position upon the disengagement of said stop member from said film wind-up and shutter charge mechanism.

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