Combustion control apparatus

Details Combustion control apparatus Combustion control apparatus

1977-12-29

1980-03-11

Dority, Jr., Carroll B.

Combustion

With indicator or inspection means

Correlated with action of condition responsive burner control

431 31, 431 71, 431 73, F23N 524, F23N 500

Patent

active

041926412

ABSTRACT:
Disclosed is a combustion control apparatus of digital type, in which a fault is warned of unless ignition resumes in a predetermined time after the start of igniting operation in the reignition when fuel flaming is extinguished during combustion. The predetermined time is called safety time and the combustion control apparatus can exactly obtain such a required time or period as the safety time. With such a digital type combustion control apparatus, the safety timer for establishing the safety time comprises flip-flops adapted to count reference clock pulses. In this apparatus, the circuit for generating the reference clock pulses is set and reset by the flame extinction signal to synchronize the clock pulses and the flame extinction signal so that the safety time may be free from error. This concept can be applied to determine the prepurge time.

REFERENCES:
patent: 3324927 (1967-06-01), Staring
patent: 3715180 (1973-02-01), Cordell
patent: 3872320 (1975-03-01), Ouskewicz, Jr.

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