Plasma arc torch power disabling mechanism

Details Plasma arc torch power disabling mechanism Plasma arc torch power disabling mechanism

1992-01-17

1993-06-01

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912148, 21912154, 2191215, B23K 900

Patent

active

052162214

ABSTRACT:
A plasma arc torch has an outer heat shield removably secured onto the torch body. The heat shield includes an electrically conductive member secured on the interior surface of the heat shield and in electrical contact with the nozzle assembly or a nozzle assembly retainer member when the nozzle assembly and heat shield are secured onto the torch body. A closed loop electrical circuit is completed through a portion of the nozzle assembly and the electrically conductive member of the heat shield when both the nozzle assembly and the heat shield are secured onto the torch body. When the heat shield or the nozzle assembly are removed, the electrical circuit is open and the electrical voltage flow to the electrode is disabled.

REFERENCES:
patent: 4580032 (1986-04-01), Carkhuff
patent: 4598191 (1986-07-01), Marhic et al.
patent: 4692582 (1987-09-01), Marhic
patent: 4701590 (1987-10-01), Hatch
patent: 4814577 (1989-03-01), Dallavalle et al.
patent: 4929811 (1990-05-01), Blankenship
patent: 4959520 (1990-09-01), Okada et al.
patent: 4967055 (1990-10-01), Raney et al.
patent: 4973816 (1990-11-01), Haberman
patent: 5013885 (1991-05-01), Carkhuff et al.

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