Method and apparatus for detecting and indicating the location o

Details Method and apparatus for detecting and indicating the location o Method and apparatus for detecting and indicating the location o

1994-05-24

1995-05-02

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

340596, G08B 1700

Patent

active

054123747

ABSTRACT:
A method and related apparatus for sensing and indicating the location of a "hot spot" along a temperature sensing cable utilizes a linear stable voltage feedback loop circuit for maintaining a predetermined magnitude DC voltage across one conductor of a pair of conductors having electrically insulating jacket compositions which become electrically conductive when the temperature at any location along the surface exceeds a predetermined temperature wherein the voltage measurement is a direct indication of the distance from the NEAR END of the temperature sensing cable to the "hot spot".

REFERENCES:
patent: 4361799 (1982-11-01), Lutz
patent: 5185594 (1993-02-01), DeChurch

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