Electric heating – Metal heating – By arc
Patent
1980-12-15
1983-03-15
Albritton, C. L.
Electric heating
Metal heating
By arc
291571R, 137243, 219121ED, 219121EX, 228131, 228182, 251359, 269 47, 269 49, 269246, 269268, 269287, B23K 1500
Patent
active
043768857
ABSTRACT:
For producing the seat or valve member of a labyrinth valve a number of rings of different diameter are placed one inside the other as a workpiece with their blade-like edges turned in the same direction. The group of rings is then slipped over the middle guide or stem of a jig so that the downwardly turned blade-like edges on the rings come to rest against upwardly directed ring-like blades on the jig. These blades are designed with a form answering to the form of the other valve part with which the workpiece is to be used. The rings in the workpiece are pressed down against the blades for leveling them and are then welded together, for example by electron beam welding.
REFERENCES:
patent: 2890042 (1959-06-01), Clemensen
patent: 3000083 (1961-09-01), Bryant
patent: 3185438 (1965-05-01), Smirra
patent: 3949186 (1976-04-01), Nakayama et al.
patent: 3958739 (1976-05-01), Wicker et al.
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