Temperature dependent electrically resistive yarn
First Claim
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1. An electrically conductive yarn having a temperature dependent resistance, said yarn comprising:
- a flexible non-conducting core;
a sheath disposed on the flexible non-conducting core and having a positive temperature coefficient of resistance, said sheath including;
a low conductive matrix material which expands with increased temperature;
a plurality of distinct electrical conductors intermixed throughout the matrix material;
wherein the plurality of distinct electrical conductors provide an electrical conductive pathway through the sheath;
wherein the low conductive matrix material has a higher coefficient of expansion than the conductive particles; and
wherein expansion of the matrix material separates various conductive particles within the sheath thereby increasing the electrical resistance of the sheath;
wherein the sheath provides the positive coefficient of resistance along the length of said yarn; and
further including an insulator of non-conducting material disposed over the sheath.
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Abstract
A positive variable resistive yarn having a core, a sheath, and an insulator. The sheath includes distinct electrical conductors intermixed within a thermal expansive low conductive matrix. As the temperature of the yarn increases, the resistance of the sheath increases.
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Citations
6 Claims
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1. An electrically conductive yarn having a temperature dependent resistance, said yarn comprising:
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a flexible non-conducting core;
a sheath disposed on the flexible non-conducting core and having a positive temperature coefficient of resistance, said sheath including;
a low conductive matrix material which expands with increased temperature;
a plurality of distinct electrical conductors intermixed throughout the matrix material;
wherein the plurality of distinct electrical conductors provide an electrical conductive pathway through the sheath;
wherein the low conductive matrix material has a higher coefficient of expansion than the conductive particles; and
wherein expansion of the matrix material separates various conductive particles within the sheath thereby increasing the electrical resistance of the sheath;
wherein the sheath provides the positive coefficient of resistance along the length of said yarn; and
further including an insulator of non-conducting material disposed over the sheath. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification