Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1980-05-22
1982-07-13
Envall, Jr., Roy N.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219121P, 219121PR, 219121PW, 313210, 315330, 42218615, 42218618, H05B 102
Patent
active
043396569
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 through which a liquid flows.
REFERENCES:
patent: 3942093 (1976-03-01), Lowther
patent: 4002921 (1977-01-01), Lowther
patent: 4051045 (1977-09-01), Yamamoto et al.
patent: 4056007 (1977-11-01), Luckan
patent: 4130762 (1978-12-01), Oppel
patent: 4179618 (1979-12-01), Tanaka et al.
patent: 4200805 (1980-04-01), Le Francois
Komura Hirotsugu
Tabata Youichiro
Ueguri Shigeo
Adams Bruce L.
Burns Robert E.
Envall Jr. Roy N.
Lobato Emmanuel J.
Mitsubishi Denki & Kabushiki Kaisha
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