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Touch tablet data device

  • US 4,484,026 A
  • Filed: 03/15/1983
  • Issued: 11/20/1984
  • Est. Priority Date: 03/15/1983
  • Status: Expired due to Fees
First Claim
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1. Structure for use in inputing the X and Y coordinates of a selected contact point into a computer system, graphic display unit or similar structure, comprisinga first sheet of flexible insulating material containing a first surface and a second surface;

  • a second sheet of flexible insulating material containing a first surface and a second surface;

    resistive material formed on the first surface of said first sheet of insulating material;

    resistive material formed on the first surface of said second sheet of insulating material;

    a first conductive strip and a second conductive strip formed on two noncontacting edges of the four edges of said first surface of said first sheet adjacent to and in electrical contact with said resistive materials on said first sheet;

    a first conductive strip and a second conductive strip formed on two noncontacting edges of the four edges of said first surface of said second sheet adjacent to and in electrical contact with the resistive material on said second sheet;

    means for applying a voltage from the first to the second conductive strip through said resistive material on said first sheet;

    means, electrically connected to the first and the second conductive strips on said second sheet, for connecting said two conductive strips on said second sheet to the input lead of a means for amplifying; and

    means for arranging said first sheet and said second sheet such that said first and second conductive strips on said first sheet are orthogonal to said first and second conductive strips on said second sheet and such that the resistive material on said first sheet faces the resistive material on said second sheet but is separated therefrom by a selected space.

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