Electric heating – Metal heating – By arc
Patent
1989-12-21
1991-04-02
Paschall, M. H.
Electric heating
Metal heating
By arc
21912148, 21912159, 2191215, 219119, B23K 900
Patent
active
050048880
ABSTRACT:
A plasma torch electrode has a copper outer shell on an inner portion of which is provided a more durable composition of a silver alloy by pressing or casting to achieve longer lifetime under arcing conditions in air or oxygen while minimizing the cost of materials and fabrication.
REFERENCES:
patent: 3525848 (1970-08-01), Bugaj
patent: 3705975 (1972-12-01), Wolf et al.
patent: 3790742 (1974-02-01), Aver
patent: 4214736 (1980-07-01), Wolf et al.
patent: 4345136 (1982-08-01), Nippert
patent: 4853515 (1989-08-01), Willen et al.
C. B. Holden, "Electrode Life in an Oxygen Arc Heater", date approx. 1985.
Dighe Shyam V.
Martin Paul E.
Melilli William J.
Taylor, Jr. Raymond F.
Wolf Charles B.
Paschall M. H.
Telfer G. H.
Westinghouse Electric Corp.
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