Flame detector for pulse combustion apparatus

Details Flame detector for pulse combustion apparatus Flame detector for pulse combustion apparatus

1983-09-21

1985-01-22

Focarino, Margaret A.

Combustion

Timer, programmer, retarder or condition responsive control

By combustion or combustion zone sensor

431 1, 340579, F23N 512

Patent

active

044949243

ABSTRACT:
A flame-rod type flame detecting apparatus for detecting flames produced intermittently in a pulse-like combustion process is disclosed. An oscillation circuit generates an A.C. flame detecting voltage to be applied across the flame to be detected. The A.C. voltage modulated by the flame provides a signal representative of the presence of flame. The frequency of the A.C. voltage is selected higher than the commercial line frequency and higher than a maximum frequency of the pulse-like intermittent combustion and selected such that the positive half-waves of the applied A.C. voltage are superposed on the flames produced intermittently, and more preferably at least one positive half-wave is superposed on each of the flames.

REFERENCES:
patent: 3041589 (1962-06-01), Dietz
patent: 4080149 (1978-03-01), Wolfe

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