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Multi-axis trackball

  • US 4,933,670 A
  • Filed: 07/21/1988
  • Issued: 06/12/1990
  • Est. Priority Date: 07/21/1988
  • Status: Expired due to Term
First Claim
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1. A multi-axis electromechanical indicator apparatus comprising:

  • a rotatably mounted ball;

    a first motion sensor means for sensing rotation of the ball relative to a first axis;

    a second motion sensor means for sensing rotation of the ball relative to a second axis;

    a first peripheral member mounted adjacent a periphery of the ball for movement therearound;

    a third motion sensing means for sensing rotation of the first peripheral member relative to the ball;

    a second peripheral member mounted for movement around the periphery of the ball; and

    a fourth motion sensing means for sensing rotation of the second peripheral member relative to the ball.

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