Tungsten halogen lamp having a fine-wire filament and a hydrogen-impervious envelope
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United States of America Patent
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Oct 29, 1985
Grant Date -
N/A
app pub date -
May 2, 1983
filing date -
May 2, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This invention provides a tungsten-halogen lamp having a thin-wire filament and a hydrogen-impervious envelope. Containment of hydrogen within the lamp envelope suppresses tungsten corrosion of the filament and prevents early termination of the lamp. In the preferred embodiment, an aluminosilicate glass is employed as the hydrogen-impervious envelope material. This invention overcomes a substantial impediment in the development of a feasible tungsten-halogen lamp as a replacement for the standard Edison-type lamp for general lighting purposes.
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