Ballast for a discharge lamp having a continuous-operation...

Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Automatic cut-out or voltage regulator in the cathode or...

Reexamination Certificate

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C315S309000

Reexamination Certificate

active

07355348

ABSTRACT:
The invention relates to a novel ballast for a discharge lamp, in which a continuous-operation control circuit is brought out of operation when a physical operation, which defines a preheating time, of a preheating timer has as yet not been sufficiently returned if the lamp is intended to be restarted.

REFERENCES:
patent: 3875459 (1975-04-01), Remery et al.
patent: 5471116 (1995-11-01), Schiller
patent: 5583399 (1996-12-01), Rudolph
patent: 5801491 (1998-09-01), Canova
patent: 6008587 (1999-12-01), Mills
patent: 6448713 (2002-09-01), Farkas et al.

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