Combustion – Timer – programmer – retarder or condition responsive control – Of igniter and feed controlled sequence
Patent
1979-09-21
1982-10-05
Scott, Samuel
Combustion
Timer, programmer, retarder or condition responsive control
Of igniter and feed controlled sequence
431 74, 431 46, F23H 500, F23N 500, F23Q 908
Patent
active
043526560
ABSTRACT:
An electrical control circuit is disclosed for controlling the operation of a pilotless gas system including an igniter and a gas supply valve, wherein the gas supply valve is initially opened a predetermined time after the igniter is activated, and the igniter is subsequently deactivated a predetermined time after the gas supply valve is opened. Specifically, a control first signal is produced to activate the appliance, which control first signal is delivered to a first logic circuit for activating the igniter, and to a first delay circuit which produces a second signal delayed from the first signal by a first predetermined time period. The second signal is delivered to a gas supply valve control circuit to open the supply valve, whereupon a detector produces a third signal in response to opening of the valve. A second delay circuit produces a fourth signal delayed from the third signal by a second predetermined time period, the fourth signal being applied to the first logic circuit for deactivating the igniter a predetermined time period after the opening of the gas supply valve.
REFERENCES:
patent: 3223138 (1965-12-01), Brown
patent: 3582249 (1971-06-01), Hodgson
patent: 3895241 (1975-07-01), Cooper
patent: 4025283 (1977-05-01), Ray
patent: 4082493 (1978-04-01), Dahlgren
patent: 4137428 (1979-01-01), Federico et al.
Campbell, deceased Douglas B.
Michaud Roger P.
American Stabilis, Inc.
Ratliff, Jr. Wesley S.
Scott Samuel
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