Halogen incandescent lamp with internal current conductors of tu

Details Halogen incandescent lamp with internal current conductors of tu Halogen incandescent lamp with internal current conductors of tu

1981-05-22

1983-11-01

Demeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

H01K 120

Patent

active

044132050

ABSTRACT:
In halogen incandescent lamps having a filament 5 substantially of tungsten and a filling comprising bromine and an inert gas, a specific attack of internal current conductors 6 consisting substantially of tungsten occurs within the temperature range from 600.degree. to 1300.degree. C., which results in the formation of pits or craters in these internal current conductors 6.
In order to obviate such attack of internal current conductors 6, the internal current conductors 6 consist at least at their surface of a tungsten containing at least 0.1% by weight of rhenium.

REFERENCES:
patent: 3412277 (1968-11-01), Thouret
patent: 3443143 (1969-05-01), Koo
patent: 3470410 (1969-09-01), Patsch
patent: 3502931 (1970-03-01), Mosby

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