Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent
1979-09-20
1981-11-10
Goldberg, E. A.
Electric heating
Metal heating
Nonatmospheric environment at hot spot
21913742, 21914621, B23K 916
Patent
active
043000347
ABSTRACT:
A gas tungsten arc welding torch having an elongated gas nozzle (18) with an oblong cross section designed for deep groove, narrow gap welding. The nozzle is rotatably coupled to and communicates with a gas port within the main torch body (16) and defines a gas passage along the length of the welding electrode (10), which extends through the longitudinal axis of the nozzle. The nozzle (18) includes a detachable end section (42) which captures and supports a replaceable gas lens (30) disposed within the gas passage of the nozzle within 7/8 to 1 inch from the nozzle orifice (40), and traverse to the direction of gas flow. The electrode (10) is formed from a solid tungsten rod center (12) and a concentric outer sleeve (14) substantially lower in electrical resistivity than the tungsten rod, which is adhesively and cohesively bonded to the tungsten. The outer sleeve extends from the point of electrical connection (32) within the main torch body (16) to a point on the tungsten electrode downstream of the gas lens. The nozzle is sealably mounted (38) to the main torch body and readily detachable for easy replacement.
REFERENCES:
patent: 2794898 (1957-06-01), Gibson
patent: 3123702 (1964-03-01), Keidel et al.
patent: 3180967 (1965-04-01), Hill
patent: 3521023 (1970-07-01), Dahlman et al.
patent: 3826888 (1974-07-01), Garfield et al.
patent: 3924095 (1975-12-01), Lucas, Jr.
Glatthorn Raymond H.
Monley Robert E.
Nelson Robert L.
Schneider Urban A.
Abeles Daniel C.
George Keith E.
Goldberg E. A.
Westinghouse Electric Corp.
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