Combustion – Timer – programmer – retarder or condition responsive control – By combustion or combustion zone sensor
Patent
1977-08-26
1980-02-12
Favors, Edward G.
Combustion
Timer, programmer, retarder or condition responsive control
By combustion or combustion zone sensor
431 25, 431 70, 431 74, F23H 502
Patent
active
041881826
ABSTRACT:
Apparatus for igniting and reigniting combustible fuel emitted from a burner structure by the method of sensing ion current flow across an electrically-conductive spark gap defined in the region in which the fuel is emitted and then generating ignition sparks thereacross whenever the ion current flow indicates the emitted fuel is not burning. The ignition sparks are generated by increasing the current in the primary winding of an ignition coil at a selected rate to a predetermined optimum level and then stopping the current supplied so as to cause the collapse of the electrical field thus generated in the inductive coil. The apparatus is battery powered, has low current drain as well as minimal power requirements, uses the same electrically-conductive probe for sensing the ion current flow and for spark delivery, has an indicator lamp driven by the current surges generating the ignition sparks which visually verifies the systems integrity, has circuitry which compensates for low battery voltage, and includes a filter capacitor which is selectively connected across the battery during ignition spark generation to enhance battery life and which is selectively disconnected from the battery when ignition sparks are not being generated, thus eliminating leakage currents.
REFERENCES:
patent: 3529910 (1970-09-01), Potts et al.
patent: 3614280 (1971-10-01), Tamio
patent: 3975136 (1976-08-01), Baysinger et al.
patent: 3986814 (1976-10-01), De Mere
patent: 4015928 (1977-04-01), Carlson
Favors Edward G.
Spangler, Jr. Edwin L.
Teletronics Co., Inc. of Clifton
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