Combustion – Timer – programmer – retarder or condition responsive control – Sensor of first burner controls second burner – e.g. – pilot...
Patent
1976-11-19
1978-08-15
Dority, Jr., Carroll B.
Combustion
Timer, programmer, retarder or condition responsive control
Sensor of first burner controls second burner, e.g., pilot...
431 53, F23Q 908
Patent
active
041068890
ABSTRACT:
There is disclosed an electrical control system for the ignition of a burner such as a burner for household appliances having an interrupted pilot burner operation. The pilot burner is supplied with fuel by the first control valve which is activated open by the switch of the thermostat in response to heating demand. A combustion detection switch is provided at the pilot burner to activate a second control valve in the gas line to the main burner in response to the presence of a pilot burner flame. This flame switch has hot and cold contacts which are in control circuits to relays that operate switches in circuit to the ignition circuit and to a time operated deactivating switch. The opperations of these relays insure the inhibition of the ignition circuit once the second controlled valve is opened and the complete deactivation of the control system in the event that a pilot burner flame is not established within a predetermined time. The control system also provides for recycling of the operation in the event that the heating demand signal from the thermostat or power supply to the system is interrupted at any time during its operation.
REFERENCES:
patent: 2730169 (1956-01-01), Deubel
patent: 2751972 (1956-06-01), Loeber
patent: 2947836 (1960-08-01), Ray
patent: 2981324 (1961-04-01), Deziel
patent: 3395968 (1968-08-01), Mobarry et al.
patent: 3501253 (1970-03-01), Wade
Dority Jr. Carroll B.
Robertshaw Controls Company
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