HIGH PRESSURE DISCHARGE LAMP ELECTRODE, METHOD FOR MANUFACTURING THE SAME, AND HIGH PRESSURE DISCHARGE LAMP
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United States of America Patent
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Issued Date -
Sep 13, 2012
app pub date -
Nov 10, 2010
filing date -
Dec 16, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A high pressure discharge lamp electrode of the present invention includes a core rod (10), a head (20), and a coil (30) covering the head. The head includes a smaller-diameter section (21) on the core-rod side and a larger-diameter section (22) on a tip side. The coil covers the smaller-diameter section such that a winding-start end portion (30a) of the lowermost layer is positioned at the tip side of the smaller-diameter section, and covers the smaller-diameter section and the larger-diameter section such that a winding-finish end portion (30b) of the uppermost layer is positioned on the larger-diameter section. At least a portion of the coil is welded to the larger-diameter section.
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