Long life incandescent tungsten-halogen lamp

Details Long life incandescent tungsten-halogen lamp Long life incandescent tungsten-halogen lamp

1982-04-28

1984-05-29

Demeo, Palmer C.

Electric lamp and discharge devices

With getter

Incandescent lamp type

313559, 313579, H01K 108, H01K 156

Patent

active

044517602

ABSTRACT:
Life expectancy, through reduction of filament sag and halogen corrosion of tungsten filaments, is greatly increased for tungsten-halogen lamps by including within the filament environment a quantity of copper. The copper can be present as one of the lead-in wires; a plating on the lead-in wires; a separate copper insert; or a coating on the filament. It is believed the copper acts as an oxygen getter.

REFERENCES:
patent: 2444423 (1948-07-01), Braunsdorff
patent: 3466489 (1969-09-01), Audesse et al.
patent: 3956659 (1976-05-01), Almer et al.

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