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Position indicating apparatus for use in a digitizing tablet system

  • US 4,638,119 A
  • Filed: 11/16/1984
  • Issued: 01/20/1987
  • Est. Priority Date: 11/16/1984
  • Status: Expired due to Fees
First Claim
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1. A position indicating implement comprising:

  • a first coil;

    an alternating current power source connected to said first coil to produce a current in said first coil;

    a second coil positioned so as to be inductively coupled with said first coil; and

    a capacitor connected in series with said second coil so that the current in said first coil induces a phase shifted current in said second coil.

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