Regulated flexible heater
First Claim
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1. A regulated flexible heater for using electrical power from a primary power supply to provide regulated heat, the regulated flexible heater comprising:
- a temperature dependent variable resistance pathway including at least one flexible temperature dependent variable resistance strand of material having a positive coefficient of temperature to resistance;
a set point resistor;
a comparator circuit element, wherein the comparator circuit element monitors the resistance of the flexible temperature dependent variable resistance pathway and the set point resistor, and wherein the comparator circuit element has a comparator output with a connect condition indicating when resistance of the temperature dependent variable resistance pathway is below a control value having a predetermined relationship to the set point resistance and a disconnect condition indicating when the resistance of the temperature dependent variable resistance pathway is above the predetermined control value;
a heating circuit element including;
heating connections for receiving the electrical power from the primary power supply;
a conductive resistance pathway including at least one flexible conductive resistance strand of material;
a control circuit element receiving the comparator output, wherein the control circuit element opens the heating circuit element when the comparator output is in the disconnect condition;
wherein the flexible conductive resistance strand of material and flexible temperature dependent variable resistance strand of material are combined into a flexible planar body; and
, wherein the flexible temperature dependent variable resistance strand of material and flexible conductive resistance strand of material run separate and distinct routes through the flexible body.
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Abstract
A flexible body has a conductive resistance pathway which includes conductive resistance flexible strands of material connected in series between two supply bus flexible strands of material, and a temperature dependent variable resistance pathway with temperature dependent variable resistance flexible strands of material electrically connected in series by connection bus flexible strands of material.
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Citations
40 Claims
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1. A regulated flexible heater for using electrical power from a primary power supply to provide regulated heat, the regulated flexible heater comprising:
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a temperature dependent variable resistance pathway including at least one flexible temperature dependent variable resistance strand of material having a positive coefficient of temperature to resistance;
a set point resistor;
a comparator circuit element, wherein the comparator circuit element monitors the resistance of the flexible temperature dependent variable resistance pathway and the set point resistor, and wherein the comparator circuit element has a comparator output with a connect condition indicating when resistance of the temperature dependent variable resistance pathway is below a control value having a predetermined relationship to the set point resistance and a disconnect condition indicating when the resistance of the temperature dependent variable resistance pathway is above the predetermined control value;
a heating circuit element including;
heating connections for receiving the electrical power from the primary power supply;
a conductive resistance pathway including at least one flexible conductive resistance strand of material;
a control circuit element receiving the comparator output, wherein the control circuit element opens the heating circuit element when the comparator output is in the disconnect condition;
wherein the flexible conductive resistance strand of material and flexible temperature dependent variable resistance strand of material are combined into a flexible planar body; and
,wherein the flexible temperature dependent variable resistance strand of material and flexible conductive resistance strand of material run separate and distinct routes through the flexible body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A regulated flexible heater for using electrical power from a primary power supply to provide regulated heat, the regulated flexible heater comprising:
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a temperature dependent variable resistance pathway including at least one flexible temperature dependent variable resistance strand of material having a negative coefficient of temperature to resistance;
a set point resistor;
a comparator circuit element, wherein the comparator circuit element monitors the resistance of the flexible temperature dependent variable resistance pathway and the set point resistor, and wherein the comparator circuit element has a comparator output with a connect condition indicating when resistance of the temperature dependent variable resistance pathway is above a control value having a predetermined relationship to the set point resistance and a disconnect condition indicating when the resistance of the temperature dependent variable resistance pathway is below the predetermined control value;
a heating circuit element including;
heating connections for receiving the electrical power from the primary power supply;
a conductive resistance pathway including at least one flexible conductive resistance strand of material;
a control circuit element receiving the comparator output, wherein the control circuit element opens the heating circuit element when the comparator output is in the disconnect condition;
wherein the flexible conductive resistance strand of material and flexible temperature dependent variable resistance strand of material are combined into a flexible planar body; and
,wherein the flexible temperature dependent variable resistance strand of material and flexible conductive resistance strand of material run separate and distinct routes through the flexible body. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A regulated flexible heater for using electrical power from a primary power supply to provide regulated heat, the regulated flexible heater comprising:
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a temperature dependent variable resistance pathway including at least one flexible temperature dependent variable resistance strand of material having a positive coefficient of temperature to resistance;
a variable set point resistor;
a comparator circuit element, wherein the comparator circuit element monitors the resistance of the flexible temperature dependent variable resistance pathway and the set point resistor, and wherein the comparator circuit element has a comparator output with a connect condition indicating when resistance of the temperature dependent variable resistance pathway is below a control value having a predetermined relationship to the set point resistance and a disconnect condition indicating when the resistance of the temperature dependent variable resistance pathway is above the predetermined control value;
a heating circuit element including;
heating connections for receiving the electrical power from the primary power supply;
a conductive resistance pathway including at least one flexible conductive resistance strand of material;
a control circuit element receiving the comparator output, wherein the control circuit element opens the heating circuit element when the comparator output is in the disconnect condition; and
,wherein the flexible conductive resistance strand of material and flexible temperature dependent variable resistance strand of material are combined into a flexible planar body. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A regulated flexible heater for using electrical power from a primary power supply to provide regulated heat, the regulated flexible heater comprising:
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a temperature dependent variable resistance pathway including at least one flexible temperature dependent variable resistance strand of material having a negative coefficient of temperature to resistance;
a variable set point resistor;
a comparator circuit element, wherein the comparator circuit element monitors the resistance of the flexible temperature dependent variable resistance pathway and the set point resistor, and wherein the comparator circuit element has a comparator output with a connect condition indicating when resistance of the temperature dependent variable resistance pathway is above a control value having a predetermined relationship to the set point resistance and a disconnect condition indicating when the resistance of the temperature dependent variable resistance pathway is below the predetermined control value;
a heating circuit element including;
heating connections for receiving the electrical power from the primary power supply;
a conductive resistance pathway including at least one flexible conductive resistance strand of material;
a control circuit element receiving the comparator output, wherein the control circuit element opens the heating circuit element when the comparator output is in the disconnect condition; and
,wherein the flexible conductive resistance strand of material and flexible temperature dependent variable resistance strand of material are combined into a flexible planar body. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification