Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2006-08-15
2006-08-15
Vu, David (Department: 2828)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C361S018000
Reexamination Certificate
active
07091676
ABSTRACT:
A supplemental arc maintenance electrical supply for a high density discharge (HID) lamp (L) for applying a high frequency supplemental arc voltage to maintain the arc during a period of unstable or intermittent AC supply in addition to or in lieu of the voltage or current being supplied to the lamp by the HID ballast (12). AC supply instability is identified in less time than the unstable or intermittent power will cause the lamp to arc to extingish and energize a supplemental arc maintenance electrical supply to maintain the arc of the lamp during the period of instability or interruption, so long as its internal, rechargeable battery is operational. The monitoring system (18) also recognizes the re-establishment of a stable (as by being a persistently repeating cycle but not necessarily a sinusoidal AC supply) repeating electrical power supply which is also of sufficient energy level to maintain operation of the HID lamp.
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International Search Report PCT/US02/08220.
Crenshaw David B.
Rodriguez Reginald J.
The Bodine Company, Inc.
Vu David
Wyatt Tarrant & Combs LLP
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