PHOTOELECTRICALLY-CONTROLLED REAR-VIEW MIRROW

  • US 3,680,951 A
  • Filed: 04/01/1970
  • Issued: 08/01/1972
  • Est. Priority Date: 04/01/1970
  • Status: Expired due to Term
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First Claim
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1. A rear view mirror for a vehicle wherein a reflective panel is selectively movable between two stable positions relative to said vehicle for providing a relatively bright reflected image in a first position and relatively weak reflected image in a second position, said mirror including:

  • electromagnet means, including a single core, a current winding about said core and at least one permanent magnet armature, and responsive to current flow in one direction through said winding for magnetically retaining said armature at one location and responsive to current flow through said winding in a second direction for maintaining said armature at a second location;

    linkage means responsive to said armature in said first location for moving and mechanically detenting said reflective panel to said first position and responsive to said armature in said second location for moving and mechanically detenting said reflective panel to said second position;

    photo-sensitive means for sensing the intensity of light impinging upon said reflective panel;

    electrical circuit means for providing current through said windinG in said one direction in response to intensities sensed by said photo-sensitive means below a predetermined intensity, and for providing current through said winding in said second direction in response to intensities sensed by said photosensitive means above said predetermined intensity.

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