Combustion – Timer – programmer – retarder or condition responsive control – Of or by exhaust damper or exhaust pump
Patent
1982-02-26
1984-03-27
Barrett, Lee E.
Combustion
Timer, programmer, retarder or condition responsive control
Of or by exhaust damper or exhaust pump
236 1G, F23N 300
Patent
active
044391390
ABSTRACT:
A furnace stack damper control apparatus has a motor for connection to a stack damper to open the damper upon a call for heat by a space thermostat. The motor is driven in a closed direction by electrical energization and in an open direction by a spring return. A relay having two normally open switches and a normally closed switch is energized when a space thermostat calls for heat. The normally closed switch then opens to allow the damper motor to open the damper by the spring return. The motor has an end switch having a normally open and a normally closed circuit. The normally open circuit is used with one of the normally open switches of the relay to energize a gas valve when the damper is open. The normally closed end switch is used to provide the energization circuit for the relay by the space thermostat and the relay is maintained energized when the damper is open by the other normally open switch of the relay connected in parallel to the normally closed end switch. The circuit provides for additional safety in that normal operation of the gas valve control apparatus does not take place if the normally open or normally closed end switches stick in either position.
REFERENCES:
patent: 2241590 (1941-05-01), Field, Jr.
patent: 2396777 (1946-03-01), Edwards
patent: 2692640 (1954-10-01), Field
patent: 3273625 (1966-09-01), Holtzman et al.
patent: 3725644 (1973-04-01), Bailey
patent: 3871443 (1975-03-01), Jones
patent: 4039123 (1977-08-01), Frankel
patent: 4079884 (1978-03-01), Sherman
patent: 4087045 (1978-05-01), Matthews
patent: 4102629 (1978-07-01), Feinberg
patent: 4108369 (1978-08-01), Prikkel
patent: 4138060 (1979-02-01), Iacono
patent: 4157785 (1979-07-01), Freliech
patent: 4185769 (1980-01-01), Nezworski
patent: 4205783 (1980-06-01), Dietsche et al.
patent: 4239477 (1980-12-01), Hayes
patent: 4249883 (1981-02-01), Woolfolk
patent: 4251024 (1981-02-01), Feinberg
patent: 4264033 (1981-04-01), Kutzner et al.
M436A and M836A Damper Motor Instruction Sheet, Form No. 60-2119-3, Rev. 10-75 (0.025) by Honeywell, Inc., Minneapolis, Minn.
T8100A Microelectronic Chronotherm Fuel Saver Thermostat Instruction Sheet, Form No. 60-2535, Rev. 5-81 by Honeywell, Inc., Minneapolis, Minn.
T8200A Microelectronic Chronotherm Fuel Saver Thermostat Instruction Sheet, Form No. 60-2536, Rev. 5-81 by Honeywell, Inc., Minneapolis, Minn.
Nelson Lorne W.
Torborg Ralph H.
Barrett Lee E.
Blinn Clyde C.
Honeywell Inc.
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