Electricity: electrical systems and devices – Igniting systems – For electric spark ignition
Patent
1981-04-03
1983-09-13
Shaw, C. C.
Electricity: electrical systems and devices
Igniting systems
For electric spark ignition
340579, 431264, F23Q 300
Patent
active
044046162
ABSTRACT:
There is disclosed an igniting and flame detecting device of one rod type having an electrode used for generating a spark for firing gas from a burner and also for supplying an AC voltage for detecting a flame generated by the firing, in which a pulse generating transformer is provided for generating the spark at the electrode with its secondary coil connected in series with the electrode through a discharge tube, a flame detection transformer is provided to apply AC voltage to the flame generated by firing the gas from burner with its secondary coil connected in series with a resistor and a capacitor to form a series circuit which is connected in parallel with the discharge tube, a detection circuit is provided to detect DC voltage component produced, due to rectifying effects of the flame, across the capacitor, and a gap discharge element having a discharge starting voltage which is higher than a normal discharge starting voltage of the discharge tube is connected in parallel with the discharge tube, whereby the spark generation at the electrode and the flame detection can be effected reliably.
REFERENCES:
patent: 3740574 (1973-06-01), Taylor
patent: 3795840 (1974-03-01), Cambra
patent: 4238184 (1980-12-01), Schilling
Miyanaka Motoshi
Toudo Kenzi
Hitachi , Ltd.
Shaw C. C.
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