Back to results
US 6,855,421 B2Granted
Temperature dependent electrically resistive yarn
AssigneeMilliken & Company
InventorsAlfred R. DeAngelis, Earle Wolynes
Life of this patent
Estimating the term…
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.
Claims8
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
- wherein the low conductive matrix comprises ethylene ethylacrylate.
8 more elements
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
- wherein the low conductive matrix comprises polyethylene.
8 more elements
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
- wherein the low conductive matrix comprises a polyolefin.
8 more elements
An electrically conductive yarn having a temperature dependent resistance, said yam 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
- wherein the low conductive matrix comprises a halo-derivative of polyethylene.
8 more elements
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
- wherein the low conductive matrix comprises a thermoplastic.
8 more elements
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
- wherein the low conductive matrix comprises a thermosetting material.
8 more elements
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
- wherein the low conductive matrix comprises a cross-linked material.
8 more elements
Dependencies are inferred from the claim text.