Tungsten-filament bulb
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United States of America Patent
Stats
-
N/A
Issued Date -
Dec 14, 2006
app pub date -
Jun 10, 2005
filing date -
Jun 10, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A tungsten-filament bulb includes a filament set inside a housing. At least two magnesium-plated filaments of the filament extend through a stem of the housing. A tip of the housing forms a minute orifice for evacuating air from the housing to create a vacuum. A light cap is secured below a stem of the housing. The light cap includes an electrical contact base electrically connected to the magnesium-plated filaments of the filament set. With a design of the above-mentioned orifice in the tip of the housing, a conventional manufacturing defect of a deformation can be avoided when fabricating the housing with a column together by heating.
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Cited Art Landscape
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