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Opto-mechanical cursor positioning device

  • US 4,543,571 A
  • Filed: 11/05/1982
  • Issued: 09/24/1985
  • Est. Priority Date: 11/05/1982
  • Status: Expired due to Fees
First Claim
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1. A device for controlling the position of a cursor in a display instrument, comprising:

  • an enclosure adapted to rest on a surface and be moveable by hand thereacross;

    optical means responsive to relative motion between said enclosure and a surface for detecting the extent of motion of said enclosure relative to said surface, said optical means being contained within said enclosure and requiring no physical contact with said surface, andmechanical means within said enclosure and independent of said optical means for detecting the direction of movement of said enclosure across said surface without having to physically contact said surface other than the enclosure being adapted to rest on said surface.thereby optically developing a signal proportional to distance traversed and independently developing a signal indicating the direction of such movement, whereby said signals in combination are usable to controllably move a cursor across a display instrument.

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