ELECTRODE FOR ULTRA-HIGH PRESSURE MERCURY LAMP AND ULTRA-HIGH PRESSURE MERCURY LAMP
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United States of America Patent
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Issued Date -
Feb 17, 2011
app pub date -
Apr 15, 2009
filing date -
Apr 30, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is a tungsten electrode for ultra-high pressure mercury lamps comprising an electrode rod, a first coil wound around the front end side of the electrode, and a second coil wound around the electrode rod starting from the end of the first coil. The tungsten wire of the first coil is smaller in diameter than the tungsten wire of the second coil.
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