Shielding apparatus

Details Shielding apparatus Shielding apparatus

1974-06-11

1977-01-25

Truhe, J. V.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

219 60A, 219 74, 219122, B23K 916

Patent

active

040053059

ABSTRACT:
A self-propelled arc welding device, which uses an inert gas within a primary zone to protect superheated metal from contact with atmospheric elements, is shielded with an outer compartment to protect against external air currents in the form of a portable shroud which closes off air currents along the work surface, at least partially. Particularly, for protecting girth welds in pipelines welded by a track-guided machine moving orbitally about the pipe, the compartment includes elements which make a substantially line contact with the pipe surface. The carriage which supports the welding device preferably carries the arc-enclosing shield. An observation window or opening for watching the arc is provided and free access to controls and adjustment means is permitted so that normal control operations are not hampered.

REFERENCES:
patent: 1552369 (1925-09-01), White
patent: 1711151 (1929-04-01), Lincoln
patent: 1749765 (1930-03-01), Hendrickson
patent: 2981824 (1961-04-01), Kitrell
patent: 3136882 (1964-06-01), Radtke
patent: 3604612 (1971-09-01), Miller et al.

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