Methods of making incandescent lamps

Details Methods of making incandescent lamps Methods of making incandescent lamps

1975-08-08

1977-06-07

Lazarus, Richard B.

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

H01K 118

Patent

active

040273636

ABSTRACT:
Axial-geometry incandescent lamps with accurately aligned, self-centering helical filaments are disclosed, the filaments having heavy end sections which are mechanically deformed to grip a helical center section. Tubular lamp envelopes have a glass center section and metal end sections heat-sealed thereto. Envelopes are produced in quantity by a machine having magazines loaded with envelope components, the components being automatically assembled and united by heat sealing. Envelopes of larger size may employ glass-beaded metal end sections formed before the end sections are assembled with the center section. Rotation of the envelope components during heat sealing ensures seal uniformity and concentricity.

REFERENCES:
patent: 1013914 (1912-01-01), Whitney
patent: 3310864 (1967-03-01), Mackerrow
patent: 3408719 (1968-11-01), Van Sickler et al.
patent: 3505556 (1970-04-01), Belknap
patent: 3763390 (1973-10-01), Belknap

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