Voltage measuring sheet
First Claim
Patent Images
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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Abstract
A voltage measuring sheet which is capable of qualitatively measuring the existing strength of condition of batteries has an electrically conductive layer and a temperature-sensitive decoloring type coloring layer which are provided on a transparent substrate. The sheet further has contacts defined by the conductive layer which are brought into contact with two electrodes, respectively, of a battery which is to be measured. In addition, a scale pattern is disposed underneath the coloring layer. Thus, it is possible to simplify the arrangement and hence production of the sheet and facilitate the reading of indication on the sheet.
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Citations
3 Claims
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1. A voltage measuring sheet consisting essentially of:
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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. - View Dependent Claims (2, 3)
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Specification