Electric heating – Metal heating – By arc
Patent
1986-08-22
1988-02-23
Goldberg, E. A.
Electric heating
Metal heating
By arc
21913731, B23K 932, B23K 900
Patent
active
047272384
ABSTRACT:
A fume-extracting welding gun has an internal fume-extracting passage and comprises a handle member and a head member which have a normally-fixed angular position but which can be adjusted to another selected angular position. The head member has variable dimension passageways therethrough to the fume-extracting passageway to enable the vacuum applied at the welding site by the fume-extracting passageway to be varied by varying the flow of air through the passageways. The passageways are provided by openings in overlapping portions of a sleeve member and the head member and rotation of the sleeve member varies the passageway dimension.
REFERENCES:
patent: 3536888 (1970-10-01), Borneman
patent: 3909586 (1975-09-01), Landis et al.
patent: 4496823 (1985-01-01), Mann
Bob Mann & Associates Inc.
Goldberg E. A.
Sigda C. M.
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