Indicating device
First Claim
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1. An indicating device comprising:
- a first thin foil-like substrate comprising;
material of low thermal and electrical conductivity having at least one tapered section;
means for suspending at least a portion of said substrate in ambient gas at two ends;
temperature indicating material carried by said substrate such material changing from one physical state to another at a critical and predetermined temperature;
means for coupling said substrate to a current source, said substrate having at least one temperature gradient along it wherein a sharp line of delineating appears on said indicating material between such material in its two states.
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Abstract
An indicating device in the form of a thin metallic foil such as manganin on which a temperature indicating material such as Tempilaq is sprayed the foil being tapered to provide a temperature gradient whereby the passage of current through the tapered wedge causes a melt line to occur indicating the amount of current flow.
48 Citations
7 Claims
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1. An indicating device comprising:
- a first thin foil-like substrate comprising;
material of low thermal and electrical conductivity having at least one tapered section;
means for suspending at least a portion of said substrate in ambient gas at two ends;
temperature indicating material carried by said substrate such material changing from one physical state to another at a critical and predetermined temperature;
means for coupling said substrate to a current source, said substrate having at least one temperature gradient along it wherein a sharp line of delineating appears on said indicating material between such material in its two states. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a first thin foil-like substrate comprising;
Specification