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Control mechanism for electronic apparatus

  • US 4,712,101 A
  • Filed: 12/04/1984
  • Issued: 12/08/1987
  • Est. Priority Date: 12/04/1984
  • Status: Expired due to Term
First Claim
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1. A mechanism for controlling by hand the movement of a cursor or pointer of a computer display in conjunction with a keyboard comprising:

  • a longitudinal rotatable shaft;

    a housing for supporting said rotatable shaft;

    a cylindrical member mounted coaxially around a portion of said shaft, said member being slidable axially along said shaft and rotatable about said shaft;

    first and second encoding means coupled to said shaft and cylindrical member respectively for sensing rotation of said shaft and linear movement of said cylindrical member along said shaft and for generating output signals representing the magnitudes and directions of such rotation and linear movement respectively, so that the motions of said shaft and said member enable the adjustment of said output signals with a resultant change in the position of said cursor or pointer.

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