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Interactive pointing device

  • US 5,734,371 A
  • Filed: 12/23/1996
  • Issued: 03/31/1998
  • Est. Priority Date: 12/19/1994
  • Status: Expired due to Term
First Claim
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1. A pointing device comprising:

  • (a) a gimballed magnetic sensor for detecting the horizontal position of the pointing device relative to an initial reference position in the earth'"'"'s magnetic field and, in response to the horizontal position of the pointing device, generating a horizontal position indication signal;

    (b) an inclination sensor for detecting the relative vertical position of the pointing device relative to the initial reference position and, in response to the vertical position of the pointing device, and not in response to the earth'"'"'s magnetic field, generating a vertical position indication signal; and

    (c) a processor, responsive to the horizontal and vertical position indication signals, for generating a position signal indicative of the horizontal and vertical positions of the pointing device relative to the initial reference position.

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