Electronic control arrangement for detecting a leak condition fo

Details Electronic control arrangement for detecting a leak condition fo Electronic control arrangement for detecting a leak condition fo

1975-10-14

1977-09-13

Favors, Edward G.

Combustion

Timer, programmer, retarder or condition responsive control

By sensing of gas leakage, flashback or escaped flame

431 16, F23N 524

Patent

active

040478785

ABSTRACT:
A control arrangement for use in an automatic fuel ignition system for providing electronic detection of a leak condition for a pilot valve operable to supply fuel to a pilot outlet for ignition to establish pilot flame includes a flame sensing circuit which effects operation of a main valve when a pilot flame is established, the flame sensing circuit maintaining the main valve deenergized when a pilot flame is established during an ignition interval and permitting a delay device to deenergize the pilot valve for a time to interrupt the supply of fuel to the pilot outlet to attempt to extinguish the pilot flame, and a time out device operable to deactivate the system when the delay device fails to cause the pilot flame to be extinguished, the flame sensing means overriding the delay device and the timeout device when the pilot flame is established at the end of the ignition interval.

REFERENCES:
patent: 3223138 (1965-12-01), Brown
patent: 3273019 (1966-09-01), Matthews
patent: 3488131 (1970-01-01), Myers et al.
patent: 3583842 (1971-06-01), Hancock et al.
patent: 3744954 (1973-07-01), Faulkner
patent: 3840322 (1974-10-01), Cade
patent: 3947220 (1976-03-01), Dietz

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