Electric heating – Metal heating – By arc
Patent
1983-01-21
1985-10-22
Paschall, M. H.
Electric heating
Metal heating
By arc
219121PN, 219121PR, 219121PA, 219 75, 31323131, B23K 900
Patent
active
045490651
ABSTRACT:
A plasma arc torch is disclosed which comprises a rear electrode, an aligned front tubular electrode, and vortex generating means for generating a vortical flow of gas between the rear and front electrodes. The torch further includes an inner shroud which is electrically connected to the front electrode, and an outer shroud which is electrically insulated from both of the electrodes and from the inner shroud. A power supply is operatively connected to the rear electrode and the outer shroud, which is adapted to generate an arc which extends axially from the rear electrode through the vortical flow of gas and through the front electrode, with the front electrode and inner shroud thereby electrically "floating" with respect to the power supply. A water cooling system is also provided which includes a coolant flow path which extends serially from the rear electrode through an insulator to the front electrode, then to the inner shroud, and then through an insulator to the outer shroud.
REFERENCES:
patent: 3194941 (1965-07-01), Baird
patent: 3673375 (1972-06-01), Camacho
patent: 3740522 (1973-06-01), Muehlberger
patent: 3818174 (1974-06-01), Camacho
patent: 4311897 (1982-01-01), Yerushalmy
Plasma Jet Technology, NASA SP-5033, Oct. 1965, 200 pages.
NASA SP-5033, entitled "Plasma Jet Technology" cover sheet.
Camacho David P.
Camacho Salvador L.
Paschall M. H.
Technology Application Services Corporation
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