Electrode for plasma arc torch and method of making same

Details Electrode for plasma arc torch and method of making same Electrode for plasma arc torch and method of making same

1999-11-24

2000-09-05

Paschall, Mark

Electric heating

Metal heating

By arc

219119, 21912159, 2191215, B23K 1000

Patent

active

061146501

ABSTRACT:
An electrode for a plasma arc torch comprises a copper holder having a lower end which mounts an emissive element serving as the cathode terminal for the arc during operation. A relatively non-emissive separator formed of silver alloyed with 0.5 to 4 percent of copper or other metals surrounds the emissive element and separates the emissive element from the copper holder at the exposed end face of the electrode. The separator serves to prevent the arc from detaching from the emissive element and attaching to the copper holder.

REFERENCES:
patent: 4423617 (1984-01-01), Nippert
patent: 5004888 (1991-04-01), Wolf et al.
patent: 5023425 (1991-06-01), Severance, Jr.
patent: 5097111 (1992-03-01), Severance, Jr.
patent: 5200594 (1993-04-01), Okada et al.
patent: 5451379 (1995-09-01), Nemchinsky et al.
patent: 5628924 (1997-05-01), Yoshimitsu et al.
patent: 5676864 (1997-10-01), Walters
patent: 5726414 (1998-03-01), Kitahashi et al.
patent: 5844196 (1998-12-01), Oakley

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