Flame responsive control circuit

Details Flame responsive control circuit Flame responsive control circuit

1979-04-09

1980-11-25

Lowrance, George E.

Combustion

Timer, programmer, retarder or condition responsive control

Of igniter and feed controlled sequence

431 68, 431 78, F23N 508

Patent

active

042355877

ABSTRACT:
A flame responsive control circuit means has been disclosed which responds to the flame in a burner. The response is to the sudden rate of change of the resistance or impedance of a photocell upon the loss of flame. The two embodiments disclosed both utilize a rate of change sensing means to determine that a loss of flame has occurred. If a loss occurs, ignition is reinstituted immediately and the system either operates normally or locks itself out in a safety shut down.

REFERENCES:
patent: 2906928 (1959-09-01), Klein
patent: 3270800 (1966-09-01), Deziel
patent: 3425780 (1969-04-01), Potts
patent: 3425780 (1969-02-01), Potts
patent: 3514240 (1970-05-01), Potts
patent: 3816053 (1974-06-01), Cade
patent: 3818285 (1974-06-01), Carson
patent: 3829981 (1975-07-01), Bauer
patent: 3832123 (1974-08-01), Walbridge
patent: 3852729 (1974-12-01), Cade
patent: 3930783 (1976-01-01), Bauer
patent: 3947218 (1976-03-01), Landis
patent: 4000961 (1977-01-01), Mandock
patent: 4088984 (1978-05-01), Muramoto
patent: 4178149 (1979-11-01), Matthews

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