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ELECTRICAL SENSOR OF PLANE COORDINATES

  • US 3,662,105 A
  • Filed: 05/21/1970
  • Issued: 05/09/1972
  • Est. Priority Date: 05/21/1970
  • Status: Expired due to Term
First Claim
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1. An electrical sensor of plane coordinates comprising first and second sheets of conductive material spaced from each other and having a uniform resistivity throughout, insulating means separating said sheets, each of said sheets having attached thereto a pair of electrodes equally spaced from each other across the sheet, said sheets being juxtaposed to provide an indeterminate number of sets of plane coordinates in the form of equipotential lines normal to each other across the respective sheets of conductive material first and second electrical circuits including the respective conductive sheets floating with respect to each other and with respect to ground, a pair of conductors extending respectively from one of the electrodes of each conductive sheet and adapted to carry a signal at a potential representative of a selected point on the sheet to which it is attached, and movable probe means for touching each of said sheets at said selected point in order to generate said signals and without altering the spacing between said conductive sheets.

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