Method of manufacturing bent filaments and device for carrying o

Details Method of manufacturing bent filaments and device for carrying o Method of manufacturing bent filaments and device for carrying o

1975-03-19

1976-11-23

Larson, Lowell A.

Wireworking

Article making or forming

Electric lamp or electric space discharge device electrode

72149, B21F 4500

Patent

active

039931072

ABSTRACT:
A method of manufacturing bent filaments for incandescent lamps, a core-free filament is seized by its ends. The front end is moved around a mandril which is driven in accordance with the filament bending speed, while the rear end of the filament is moved in a straight line in the direction of the original filament axis.

REFERENCES:
patent: 1214551 (1917-02-01), Karpouich
patent: 1733802 (1929-10-01), Higgins
patent: 3048201 (1962-08-01), Johnson

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