Flame safeguard sequencer having safe start check

Details Flame safeguard sequencer having safe start check Flame safeguard sequencer having safe start check

1983-01-10

1984-05-29

Scott, Samuel

Combustion

With indicator or inspection means

Correlated with action of condition responsive burner control

431 18, 431 24, 431 26, 431 29, 431 69, 340577, F23N 524

Patent

active

044512260

ABSTRACT:
A purge time hold circuit is provided in a flame safeguard sequencer to in turn provide a safe start check of a burner control system. If a flame is indicated during a prepurge period, the purge time hold means will reset to a zero status and the timer will hold until the signal clears itself. If the flame signal does not clear itself within a preset time, a safety shut down will be commanded.

REFERENCES:
patent: 3064719 (1962-11-01), Graves
patent: 3082813 (1963-03-01), Hamelink
patent: 3143162 (1964-08-01), Graves et al.
patent: 3644748 (1972-02-01), Lord
patent: 3814569 (1974-06-01), Jacobsz
patent: 4078878 (1978-03-01), Barbour et al.
patent: 4101258 (1978-07-01), Jacobsz
patent: 4137035 (1979-01-01), Cade
patent: 4192641 (1980-03-01), Nakagawa et al.
patent: 4399537 (1963-08-01), Jones

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