Electric heating – Metal heating – By arc
Patent
1989-02-17
1990-08-21
Shaw, Clifford C.
Electric heating
Metal heating
By arc
2191305, B23K 906
Patent
active
049508644
ABSTRACT:
A system for starting an arc for welding uses three DC power supplies, a high voltage supply for initiating the arc, an intermediate voltage supply for sustaining the arc, and a low voltage welding supply directly connected across the gap after the high voltage supply is disconnected.
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M. Brown, "Initiation of a Tungsten Inert Gas Arc by High Voltage D.C." Welding Institute Report, 1976, pp. 1-16.
J. Needham, "Arc Stability In Gas--Shelded Arc Welding: Part 3 Alternating Current Arcs" Welding Institute Research Bulletin, 1969, pp. 39-40.
J. Needham, "Improvements In DC and AC Power Supplies".
J. Hopwood, "Initiation of GTAW Arcs by High Voltage Impulses", Sandia Report SAND82-8020, 8/1982, pp. 3-18.
Campiotti Richard H.
Hopwood James E.
Chafin James H.
Libman George H.
Moser William R.
Shaw Clifford C.
The United States of America as represented by the United States
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