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DEVICE FOR THE AUTOMATIC STOP SETTING OF PHOTOGRAPHIC CAMERAS

  • US 3,816,841 A
  • Filed: 10/06/1972
  • Issued: 06/11/1974
  • Est. Priority Date: 10/13/1971
  • Status: Expired due to Term
First Claim
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1. An attachment for automatically positioning the rotatable light stop setting ring on the lens of a camera, said attachment comprising:

  • a rotatable adjusting ring;

    means for mechanically coupling the adjusting ring and the setting ring for movement in unison comprising a coupling ring segment received in a particular position on said setting ring, said segment having a curved periphery with an opening thereon, and a pawl mounted on the adjusting ring in a position to enter said opening on the segment and thereby engage the segment, said pawl being movable toward and away from the segment so that it can rest on said periphery when not aligned with the segment opening;

    a servomotor coupled to the adjusting ring for rotating the same; and

    control means coupled to the servomotor and including a photoelectric detector positioned on the object side of the attachment for controlling the servomotor in response to the ambient light conditions.

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