Heater cut off circuit and method

Details Heater cut off circuit and method Heater cut off circuit and method

1995-03-31

1997-02-04

Deboer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

73295, H02H 504

Patent

active

056005288

ABSTRACT:
A safety device for heated sensors. A signal representing a threshold voltage is compared with a signal from the sensor representing sensor temperature. If the latter is greater than the threshold signal, a switch is opened to remove power from the means for heating the sensor. The normal state of the switch is closed, so after cooling, heat is again applied to the sensor.

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patent: 4449403 (1984-05-01), McQueen
patent: 4740671 (1988-04-01), Kuroda et al.
patent: 5178009 (1993-01-01), Arekapudi et al.

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