Halogen incandescent lamp with internal current conductors of tungsten-rhenium alloy
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United States of America Patent
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-
Nov 1, 1983
Grant Date -
N/A
app pub date -
May 22, 1981
filing date -
Jun 26, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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