Automatic temperature and humidity regulation – Miscellaneous – Burner controls with automatic cutoff
Patent
1976-09-27
1978-04-18
Wayner, William E.
Automatic temperature and humidity regulation
Miscellaneous
Burner controls with automatic cutoff
110163, 126286, F23N 000, G05D 2300
Patent
active
040847438
ABSTRACT:
A control arrangement for a heating system including a furnace having a fuel-fired burner apparatus and a vent stack with a motor driven damper plate pivotally mounted within the stack, includes a stack damper control circuit including first and second limit switches which permit energization of a drive motor in response to a request for heat, premitting the damper plate to be driven to an open position, and for energizing an interlock switch which prepares an energizing path for fuel supply valves of the system, the first limit switch being operated when the damper plate approaches the open position to complete the energizing path for the fuel supply valves prepared by the interlock switch, and the second limit switch deenergizing the motor when the damper plate is driven to the fully open position. The motor is reenergized at the end of the heating cycle to drive the damper plate to the closed position, and the second limit switch deenergizes the motor when the damper plate reaches the closed position.
REFERENCES:
patent: 2155642 (1939-04-01), Dewey
patent: 3086583 (1963-04-01), Reichow
patent: 3934796 (1976-01-01), Smith
Hayes Thomas Edward
Matthews Russell Byron
Charvat Robert J.
Johnson Controls Inc.
Wayner William E.
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