Electric heating – Metal heating – Of cylinders
Patent
1985-04-26
1987-10-06
Goldberg, E. A.
Electric heating
Metal heating
Of cylinders
219 60R, B23K 902, B23K 3702
Patent
active
046984747
ABSTRACT:
Welding tongs for connecting two abutting pipe ends to each other by arc welding, includes two rigid jaws, a clamping device in the form of two symmetrical clamping jaws guided in the rigid jaws in radial direction of the surface of a pipe, the clamping jaws having contact surfaces adapted to the surface of a pipe for holding at least one pipe end, two angle levers each being connected to a respective one of the clamping jaws, a tie rod connected to the angle levers, a pair of levers connected to the tie rod and operating in vicinity of an extended position thereof, an operating handle connected to the pair of levers, a spring member biased between the clamping jaws and the pair of levers, a track, a welding electrode disposed on the track, and a motor connected to the electrode for moving the electrode along the track.
REFERENCES:
patent: 3560696 (1971-02-01), Grinenko et al.
patent: 3649799 (1972-03-01), Jeromson, Jr.
patent: 3688071 (1972-08-01), Kennelly
patent: 4068791 (1978-01-01), Scholtus et al.
patent: 4161640 (1979-07-01), Bromwich et al.
patent: 4554429 (1986-11-01), Kazlauskas
Forner Siegfried
Gugel Siegfried
Pellkofer Dieter
Goldberg E. A.
Greenberg Laurence A.
Kraftwerk Union Aktiengesellschaft
Lerner Herbert L.
Sigda Catherine M.
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