High intensity discharge lamps, arc tubes and methods of manufacture
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United States of America Patent
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N/A
Issued Date -
Jan 22, 2004
app pub date -
Jun 10, 2003
filing date -
Mar 8, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A tipless arc tube for a high intensity discharge lamp and method of manufacture wherein the arc tube may remain open to an uncontrolled atmosphere during the step of hermetically sealing the arc tube. The novel arc tube and method obviate the need to perform any process steps within a controlled atmosphere. The pressure of the fill gas sealed within the arc tube may be controlled by controlling the temperature of the fill gas during the step of hermetically sealing the arc tube. The novel arc tube and method obviate the need to use a pump to control the fill gas pressure.
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