Plasma torch initiated by short-circuit

Details Plasma torch initiated by short-circuit Plasma torch initiated by short-circuit

1990-11-07

1993-05-11

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912149, 21912157, 21912154, B23K 900

Patent

active

052103927

ABSTRACT:
A plasma torch includes two tubular coaxial electrodes, at least one of which is axially movable between an operating position in which the movable electrode is spaced from the other electrode and an initiating position in which the movable electrode is in contact with the other electrode, thus establishing an electric short circuit so as to generate an electric arc upon rupture of the electric short circuit hen the mobile electrode is brought back to its operating position. Each electrode is contained in a support provided with a cooling circuit, through which a cooling fluid circulates. The cooling circuit associated with the movable electrode is provided with a seal which permits the electrode to be moved without creating any leaks in the cooling circuit.

REFERENCES:
patent: 3211944 (1965-10-01), Fein
patent: 3301995 (1967-01-01), Eschenbach et al.
patent: 4034250 (1977-05-01), Kiselev et al.
patent: 4567346 (1986-01-01), Marhic
patent: 4596918 (1986-06-01), Ponghis
patent: 4788408 (1988-11-01), Wlodarczyk et al.
patent: 4791268 (1988-12-01), Sanders et al.
patent: 4896016 (1990-01-01), Broberg et al.
patent: 4929811 (1990-05-01), Blankenship

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