Stoves and furnaces – Hot-air furnaces – Magazine
Patent
1985-01-07
1985-12-10
Green, Randall L.
Stoves and furnaces
Hot-air furnaces
Magazine
126152B, 126152R, 126 85R, 126245, 126110R, 126 99A, 110101C, 110101CC, 237 52, 237 53, F24H 918, F23K 300
Patent
active
045572488
ABSTRACT:
A furnace for wood log fuel having apparatus which automatically inserts the logs into the furnace combustion chamber. The log fuel is retained in a sloping ramp storage compartment. Electrical circuitry controlled by a thermostat operates to move a log into an elongated chamber from which a motor driven injector pushes the log into the combustion chamber through a doorway covered by a flexible, segmented flap covering and also a door which is pushed open by the advancing log. The presence of the log on a spring mounted grate operates certain switches to return the injection mechanism to its ready condition and also to operate a fan which provides combustion air to the combustion chamber. The reduced weight on the grate by the consumption of the log by the fire permits the grate to move to a position to re-initiate the log injection cycle. A standby gas fuel burner system is also provided and is controlled by the thermostat to operate when the log fuel heat is insufficient, such as upon the supply of log fuel becoming exhausted. An optional auger conveyor which operates under the control of dual timers for automatic discharge of ashes from the furnace is also disclosed.
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patent: 4480630 (1984-11-01), Wilhoite
patent: 4503782 (1985-03-01), Helton
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