Plasma torch with safety switch

Details Plasma torch with safety switch Plasma torch with safety switch

1989-03-28

1990-11-27

Paschall, M. H.

Electric heating

Metal heating

By arc

21912151, 21912154, 219 75, B23K 900

Patent

active

049738160

ABSTRACT:
A plasma torch is provided with a safety switch which is connected in a circuit so as to control high voltage applied to the torch. The switch is held closed by the torch tip. When the tip is removed, as for service or replacement, the switch opens and disables the high voltage, so that personnel cannot accidentally be shocked.

REFERENCES:
patent: 4580032 (1986-04-01), Carkhoff
patent: 4585921 (1986-04-01), Wilkins et al.
patent: 4590354 (1986-05-01), Mashic et al.
patent: 4691094 (1987-09-01), Hatch et al.
patent: 4692582 (1987-09-01), Marhic
patent: 4701590 (1987-10-01), Hatch
patent: 4767908 (1988-08-01), Dallavalle et al.
patent: 4791268 (1988-12-01), Sanders et al.

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