Combustion – Timer – programmer – retarder or condition responsive control – By combustion or combustion zone sensor
Patent
1974-10-21
1976-03-30
Favors, Edward G.
Combustion
Timer, programmer, retarder or condition responsive control
By combustion or combustion zone sensor
317 96, 431 27, 431 71, F23H 512
Patent
active
039472205
ABSTRACT:
A control arrangement for igniting gaseous fuel supplied to a main burner of a fuel ignition system includes a spark producing circuit to ignite the gaseous fuel for establishing a flame at the main burner, a flame sensing circuit for detecting the presence and absence of the flame, and a switching circuit responsive to the flame sensing circuit detecting the presence of the flame for maintaining a control circuit enabled to hold the valve operated and for de-activating the spark producing circuit when the flame becomes established. In the event of a flame-out condition, the flame sensing circuit enables the switching circuit to activate the spark producing circuit to attempt to re-establish the flame. A timing circuit responds to the flame sensing circuit detecting the absence of the flame for maintaining the control circuit enabled for a predetermined time and for causing the control circuit to be disabled to turn off the valve and interrupt the flow of fuel to the main burner whenever the flame fails to be re-established within the predetermined time.
REFERENCES:
patent: 3574496 (1971-04-01), Hewitt
patent: 3732433 (1973-05-01), Lourigan
patent: 3840322 (1974-10-01), Cade
patent: 3847533 (1974-11-01), Riordan
Favors Edward G.
Johnson Service Company
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