Self-powered automatic secondary air controllers for woodstoves

Details Self-powered automatic secondary air controllers for woodstoves Self-powered automatic secondary air controllers for woodstoves

1989-03-15

1991-05-14

Jones, Larry

Stoves and furnaces

Stoves

Heating

126 80, 126289, 126112, 236 99C, 110214, F24C 114

Patent

active

050146807

ABSTRACT:
A controller for automatically regulating the supply of secondary combustion air to woodstoves and small furnaces. The controller includes a movable air valve for controlling the amount of secondary air admitted into the chamber. A self powered means monitors the concentration of combustible gases and vapors and actuates the movable air valve to increase the supply of secondary air in response to increasing concentrations of the combustible gases and vapors. The self-powered means can be two fluid filled sensor bulbs, one of which has a coating of a combustion catalyst. Alternatively, the self powered means can be two metallic stripes laminated together, one of which is coated with a combustion catalyst, and when heated, causes the air valve to actuate.

REFERENCES:
patent: 990772 (1911-04-01), Pollard
patent: 4380228 (1983-04-01), Crowley
patent: 4607610 (1986-08-01), Zimmermann
patent: 4691686 (1987-09-01), Alvarez
patent: 4862869 (1989-09-01), Hazard

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