Electric heating – Metal heating – By arc
Patent
1992-09-21
1994-09-20
Shaw, Clifford C.
Electric heating
Metal heating
By arc
B23K 9173
Patent
active
053491580
ABSTRACT:
The torch body terminates with a stepped, outwardly-decreasing cross section which, beginning from the innermost portion, comprises a collar (2) of polygonal or equivalent shape and, thereafter, a cylindrical portion of round cross section (3) and a threaded end portion (4) having screwed thereon the gas-diffusing nozzle (9), which is provided, preferably, with unscrewing-preventing means (10--10') and which firmly mounts a bush (12) of rigid plastics or other suitable material for protection of said nozzle and of a portion of the wire-guiding spout (11) which is screwed on said nozzle. The nozzle (9) locks in the axial direction the parts lining surrounding said cylindrical and cooled portion (3) of the torch body, the outermost portion (7) of them being preferably of metal, being coupled at an end to said collar (2) with the interposition of an insert (6-30) of insulating material, and the latter portion (7) having frictionally fitted thereon a resiliently-clamping end portion of a metallic housing (13) which surrounds and protects said nozzle and wire-guiding spout.
REFERENCES:
patent: 3265856 (1966-08-01), Cecil
patent: 4158763 (1979-06-01), Moerke
patent: 4313046 (1982-01-01), Henry et al.
patent: 4864099 (1989-09-01), Cusik, III et al.
patent: 4916270 (1990-04-01), West et al.
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