Electric heating – Metal heating – By arc
Patent
1989-11-24
1991-10-22
Paschall, M. H.
Electric heating
Metal heating
By arc
55120, 174 153, 373114, 21912143, 21912136, B23K 900, H01B 1726
Patent
active
050597574
ABSTRACT:
An electrode for a plasma carburizing furnace is disclosed which is adapted to provide a dynamic gas shroud for inhibiting the buildup of carbon soot on the insulating elements of the electrode. The reduction of carbon soot buildup on the insulating components dramatically reduces the frequency of electrical short-circuits across the insulating component, thereby increasing the availability of the furnace for processing of workpieces.
REFERENCES:
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patent: 3305619 (1967-02-01), Molstedt et al.
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patent: 4587458 (1986-05-01), Davenport et al.
patent: 4608698 (1986-08-01), Molle et al.
patent: 4760584 (1988-07-01), Jones
Plasma Carburizing-Facility Design and Operating Data, Graham Legge, Industrial Heating (Mar., 1988).
Andrews Richard E.
Gall Christopher A.
Law Trevor J.
Abar Ipsen Industries, Inc.
Paschall M. H.
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