Multiple filament lamp having wire grid to provide filament redu

Details Multiple filament lamp having wire grid to provide filament redu Multiple filament lamp having wire grid to provide filament redu

1983-08-08

1985-11-12

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

313579, 313272, H01K 126, H01K 900

Patent

active

045530661

ABSTRACT:
A multi-filament lamp that includes a tubular envelope having a pinch seal at one end thereof and containing therein a halogen atmosphere. At least two coiled tungsten filaments are disposed in the tubular envelope and are supported so as to be oriented parallel to each other in the longitudinal direction of the envelope. Lead-in wires are provided within the envelope and are hermetically sealed using metal foil strips, these being hermetically sealed within the pinch seal. Outer lead-in wires extend from the pinch seal and are each connected to a respective contact pin. A lead-in wire is associated with each filament and a common lead-in wire is also provided. A wire grid extends longitudinally within the envelope substantially in parallel to the filaments and is disposed therebetween so as to isolate one filament from the other and thereby provide filament redundancy.

REFERENCES:
patent: 2005194 (1935-06-01), Mayo
patent: 2326419 (1943-08-01), Van Horn
patent: 3493806 (1970-02-01), Jacobs
patent: 3777207 (1973-12-01), Notelteirs et al.
patent: 3784861 (1974-01-01), Notelteirs et al.
patent: 4074167 (1978-02-01), van den Broek et al.
patent: 4145630 (1979-03-01), De Caro et al.
patent: 4288844 (1981-09-01), Fisher et al.
patent: 4361779 (1982-11-01), van der Steen et al.
patent: 4361780 (1982-11-01), Brons

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