Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent
1995-03-31
1996-09-17
Shaw, Clifford C.
Electric heating
Metal heating
Nonatmospheric environment at hot spot
219136, B23K 916
Patent
active
055565506
ABSTRACT:
A gas lens collet body for use in a gas tungsten arc welding torch includes a stem portion and an outer body shell constructed from a single piece of copper to provide increased electrical conductivity and a lower co-efficient of thermal expansion. An axially extending bore in the stem portion is adapted to receive a collet and electrode and an annular passage is formed between said stem portion and said outer body shell. A plurality of concentric fine mesh stainless steel screens are mounted in an outlet end of the annular passage and a plurality of holes interconnect the bore with the annular passage at an angle of 10.degree.-15.degree. relative to a longitudinal axis of the bore. Thus a shield gas introduced into the bore will pass through the angled passages into direct engagement with the plurality of screens to provide a stable, virtually turbulence free, shielding gas stream pattern.
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patent: 4788401 (1988-11-01), Kleppen
patent: 5393949 (1995-02-01), Stricklen
Shaw Clifford C.
Welding Nozzle International
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