Active gas plasma arc torch and a method of operating the same

Details Active gas plasma arc torch and a method of operating the same Active gas plasma arc torch and a method of operating the same

1978-05-16

1979-08-07

Tolin, Gerald P.

Electric heating

Metal heating

By arc

219 75, 3132314, B23K 500

Patent

active

041638913

ABSTRACT:
An active gas plasma arc torch and a method of operating the same, said torch including a rod-shaped cathode, a first gas passage formed around said cathode to feed a protecting gas or shielding gas, a second gas passage formed around said first gas passage to feed a plasma gas and a constricted port for discharging the plasma gas, characterized in that at least a part of the shielding gas which flows out from the first gas passage is removed from the inside of the torch at the position short of said constricted port of the torch, whereby the working quality and the working speed are substantially improved while the rod-shaped cathode is satisfactorily protected by the shielding gas.

REFERENCES:
patent: 2862099 (1958-11-01), Gage
patent: 3729611 (1973-04-01), Vas
patent: 3949188 (1976-04-01), Tateno

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