Wood and gas fired furnace

Patent · Tue Dec 10 00:00:00 EST 1985

OSTI ID:5890614

Richards, J A

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.

• Assignee: IFI; EDB-86-103613
• Patent Number(s): US 4557248
• OSTI ID: 5890614
• Resource Relation: Patent File Date: Filed date 7 Jan 1985; Other Information: PAT-APPL-689439
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
GAS FURNACES
DESIGN
FUEL FEEDING SYSTEMS
WOOD BURNING FURNACES
COMBUSTION CONTROL
CONTROL SYSTEMS
CONVEYORS
OPERATION
TEMPERATURE MONITORING
THERMOSTATS
WOOD
APPLIANCES
CONTROL
CONTROL EQUIPMENT
EQUIPMENT
FUEL SYSTEMS
FURNACES
HAULAGE EQUIPMENT
MATERIALS HANDLING EQUIPMENT
MONITORING
WOOD BURNING APPLIANCES
421000* - Engineering- Combustion Systems
320100 - Energy Conservation
Consumption
& Utilization- Buildings