Inlead and method of making a discharge lamp
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United States of America Patent
Stats
-
Mar 3, 1981
Grant Date -
N/A
app pub date -
Apr 23, 1979
filing date -
Apr 23, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The inlead for the electrode sealed into a quartz arc tube has a foil portion which is stiffened by reversely folded lateral edges. The folds overlap the tapering region of greater stiffness where the foil portion joins the end portions. In making a discharge lamp, the electrode-inlead assembly is self-centering as a result of making the overall width of the foil portion and its folded edges exceed slightly the internal diameter of the quartz tube or neck. The frictional engagement between the folded edges and the inside wall of the neck retains the assembly in place while the neck is heat-collapsed onto the foil to seal the electrode assembly in place.
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