Stoves and furnaces – Stoves – Heating
Patent
1982-05-13
1984-07-03
O'Connor, Daniel J.
Stoves and furnaces
Stoves
Heating
126 15R, 126112, 126290, 137504, 137517, F24C 114, F16K 1500
Patent
active
044572948
ABSTRACT:
A control regulates the rate of flow of combustion air flowing into an airtight stove or furnace10 containing a fire. A control element 15 or 45 is arranged in communication with the air inflow stream and moves in response to the velocity of the flowing air. The control element 15 or 45 moves to constrict the area of the inflow stream as air velocity increases and to open the area of the inflow stream as air velocity diminishes. Springs 25 and 26 or 60-62 bias the control element toward a maximum opening, and the spring bias is non-linear to provide increasing resistance to movement as the control element approaches a closed position. The spring bias system is preferably adjustable to vary the air inflow rate that is otherwise kept steady by the control element.
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