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Voltage measuring sheet

  • US 4,835,476 A
  • Filed: 11/28/1986
  • Issued: 05/30/1989
  • Est. Priority Date: 11/28/1986
  • Status: Expired due to Fees
First Claim
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1. A voltage measuring sheet consisting essentially of:

  • a substrate;

    a first layer of an electrically conductive material provided on a portion of said substrate;

    a second layer of a temperature-sensitive decoloring type coloring agent provided on a portion of said substrate; and

    a scale pattern disposed underneath said second layer of coloring agent, whereby the heat generated in the first layer of conductive material causes a change in color of the second layer of the coloring agent so as to be observed through the substrate.

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