Method for producing helically wound filament elements, and fila

Details Method for producing helically wound filament elements, and fila Method for producing helically wound filament elements, and fila

1998-03-31

2000-12-19

Larson, Lowell A.

Wireworking

Article making or forming

Electric lamp or electric space discharge device electrode

B21F 304

Patent

active

061615986

ABSTRACT:
A method for producing helically wound filament elements, and filament elnts produced according to this method. The method is distinguished in that a thermal treatment of the incandescent wire at temperatures of over 1200.degree. C. takes place already before the winding of the incandescent wire, so that, after separation, the coil springs open and can easily be detached from the core wire.

REFERENCES:
patent: 1057088 (1913-03-01), Poag et al.
patent: 1553309 (1925-09-01), Eisler
patent: 1668016 (1928-05-01), Hauschild et al.
patent: 2034540 (1936-03-01), Smithells
patent: 2371205 (1945-03-01), Zabel
patent: 2667204 (1954-01-01), Jaycox

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