H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/36 (2006.01)
Patent
CA 2109679
ABSTRACT High intensity discharge and auxiliary lamp ballast. A ballast for lighting an auxiliary source of illumination whenever a primary source of illumination fails to ignite. The auxiliary source of illumination is effectively turned OFF by placing a short circuit thereacross whenever the primary source of illumination is lit. The short circuit is removed whenever the primary source of illumination fails to reach a predetermined level of illumination thereby permitting current to flow through and light the auxiliary source of light. The ballast also includes a power factor correction device for increasing the ballast power factor when the primary source of light reaches a predetermined level of illumination.
Daniel Edmond
Droho Joseph S.
Garbowicz Glenn D.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Philips Electronics N.v.
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