Ignition aid and fitting shroud for discharge lamp

Details Ignition aid and fitting shroud for discharge lamp Ignition aid and fitting shroud for discharge lamp

2007-06-06

2010-12-14

Guharay, Karabi (Department: 2889)

Electric lamp and discharge devices

With gas or vapor

Three or more electrode discharge device

C313S607000, C313S601000

Reexamination Certificate

active

07852004

ABSTRACT:
An ignition aid (50, 60, 70, 80, 100, 120, 130, 150, 160, or170) is provided for an HID lamp (20). Particularly the ignition aid includes an electrically conductive coil or coil portions wrapped around selected portions of the arc tube to act as the ignition aid and lower the breakdown voltage. In other embodiments, starting aids, and particularly one or more turns of the conductive coil or coil portions support the arc tube within an opening of a surrounding shroud (90) and thereby control the spacing between the arc tube (20) and the shroud (90). This limits the maximum thermal stress of the arc tube within a desired range.

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PCT/US2008/063142 International Search Report, mailed Dec. 3, 2008.

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