Shutoff system for gas fired appliances

Details Shutoff system for gas fired appliances Shutoff system for gas fired appliances

1997-05-08

1999-08-24

Jones, Larry

Combustion

Timer, programmer, retarder or condition responsive control

By combustion or combustion zone sensor

126 92AC, 25112915, 431 59, 431 66, 137 66, F23N 510

Patent

active

059416998

ABSTRACT:
Shutoff system for a gas fired appliance includes a shutoff for increased carbon monoxide concentration. A proximity sensor is associated with a thermocouple and conventional solenoid shutoff valve. Slight changes in the current resulting from temperature variations monitored by the thermocouple provide an indication of increased carbon monoxide levels. The thermocouple sensor is also preferably placed in the plenum to monitor the temperature of primary and/or secondary screens associated with the gas fired appliance. Moreover, a reflector, or concentrating element such as a parabolic reflector, focuses the radiant energy on the thermocouple.

REFERENCES:
patent: 4299554 (1981-11-01), Williams
patent: 4569329 (1986-02-01), Cherryholmes
patent: 4696639 (1987-09-01), Bohan, Jr.
patent: 5591024 (1997-01-01), Eavenson et al.
patent: 5752818 (1998-05-01), Foster

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