Glow discharge heating apparatus

Electric heating – Heating devices – Electric arc-type devices

Patent

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Details

219121PR, 219121PN, 219121P, 219292, 313 32, 313 46, 313210, 31511121, 174 15BH, 42218618, 42218619, B23K 932, H05B 718

Patent

active

043419470

ABSTRACT:
Typically, a bottom of a cup-shaped electrode opposes to that of a similar electrode through a predetermined gap and in a mixture of helium and hydrogen. A step-up transformer connected across an AC source through a resistor applies a voltage in excess of a discharge breakdown voltage for the gap across the electrodes to cause a pilot glow discharge between them before the source voltage reaches a glow hold minimum voltage for the electrodes. A rectified voltage resulting from a transformer connected across the resistor turns a bidirectional triode thyristor on to apply the source voltage across the electrodes through the conducting thyristor. This smoothly transits the pilot glow discharge to a glow discharge between the electrodes. The latter discharge heats a liquid forcedly flowing along inner surfaces of the electrodes. Also an auxiliary electrode can be operatively coupled to the electrodes to cause similarly a pilot glow discharge between it and either one of the electrodes. For a DC source a tubular anode surrounds a middle portion of a tubular cathode though which a liquid flows.

REFERENCES:
patent: 2101143 (1937-12-01), Laidig
patent: 2103362 (1937-12-01), Hansell
patent: 3412274 (1968-11-01), Wolf
patent: 3521703 (1970-07-01), Koziara
patent: 4179582 (1979-12-01), Garcia
patent: 4234800 (1980-11-01), Kenly, V et al.

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