# US 9,519,017 B2 · Circuit integrity detection system for detecting the integrity of a sensing wire in electrically heated textiles

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,519,017 B2
- Document ID: US9519017B2
- Status: Granted
- Kind: B2
- Application number: 14/028,689
- Filed: 2013-09-17
- Published: 2015-01-08
- Granted: 2016-12-13
- Earliest claimed: 2011-10-26
- Assignees: Sunbeam Products, Inc.
- Applicants: Sunbeam Products, Inc.
- Inventors: Gabriel Kohn
- Web page: https://patentgrep.com/patent/US9519017B2

## CPC

- G01K 7/16: using resistive elements
- G01K 13/00: Thermometers specially adapted for specific purposes
- G01K 15/007: {Testing}
- G01R 31/2829: {Testing of circuits in sensor or actuator systems (testing of apparatus for measuring electric or magnetic variables G01R35/00; testing of indicating or recording apparatus G01D; in airbag systems B60R21/0173; checking gas analysers G01N33/007; monitoring or fail-safe circuits for electromagnets H01F7/1844)}
- G01R 31/52: Testing for short-circuits, leakage current or ground faults
- G01R 31/54: Testing for continuity
- G01R 31/58: Testing of lines, cables or conductors (testing of electric windings G01R31/72)
- H05B 1/0272: {For heating of fabrics}
- H05B 3/342: {heaters used in textiles}
- G01N 1/00: Sampling; Preparing specimens for investigation
- G01N 2201/00: Features of devices classified in G01N21/00
- H05B 2203/019: Heaters using heating elements having a negative temperature coefficient
- H05B 2203/02: Heaters using heating elements having a positive temperature coefficient
- G01K: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00)
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

A circuit integrity detection system for use in detecting the integrity of sensing wire in a heating pad wherein the integrity of the sensing wire is checking the inputs from a first and second A/D converter connected to opposite ends of the sensing wire.

## Claims

### Claim 1

An electrically heated textile comprising:
a heating element, wherein a first signal is generated through the heating element at a first frequency;
a sensing wire for detecting a hotspot created by the heating element;
a layer having a negative temperature coefficient (NTC) positioned between the heating element and the sensing wire, wherein the sensing layer is wrapped about the NTC layer; and
a means for detecting the integrity of a sensing wire including a first A/D converter connected to a first end of the sensing wire; a second A/D converter connected to a second end of the sensing wire; and a signal detector for detecting the signal from the first and second A/D converters.

### Claim 2 (depends on 1)

The electrically heated textile as recited in claim 1, wherein when the signal from the first A/D converter equals the signal from the second A/D converter, and the voltage in the first A/D convert is less than x volts, there is no breaks in the sensing wire and no hot spots in the heating element.

### Claim 3 (depends on 1)

The electrically heated textile as recited in claim 1, wherein when the signal from the first A/D converter equal the signal from the second A/D converter, and the voltage in the first A/D convert is greater then x volts, there is no breaks in the sensing wire and a hot spot in the heating element.

### Claim 4 (depends on 1)

The electrically heated textile as recited in claim 1, wherein when the signal from the first A/D converter equal the signal from the second A/D converter, and the voltage in the first A/D convert is less then x volts, there can be a break in the sensing wire and no hot spots in the heating element.

### Claim 5 (depends on 1)

The electrically heated textile as recited in claim 1, wherein when the signal from the first A/D converter does not equal the signal from the second A/D converter there is a break in the sensing wire and a hot spot in heating element.