Electric lamp and discharge devices: systems – Plural diverse-type load devices
Patent
1985-12-23
1987-11-24
Boudreau, Leo H.
Electric lamp and discharge devices: systems
Plural diverse-type load devices
315205, 315307, 315208, 315226, 315DIG7, 315196, 315 49, 315 89, 363 37, H05B 3500, H05B 3702
Patent
active
047091886
ABSTRACT:
An AC polarity-reversing bridge ballast for an arc discharge lamp using an incandescent filament for resistive ballasting and standby illumination powers the filament during hot restart without modifying the low duty cycle operation of the starting oscillator and without introducing additional power switches. The switching elements of the polarity-reversing bridge serve the dual functions of reversing the polarity of the voltage supplied to the arc lamp during normal running conditions and energizing the filament during a restart condition.
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Boudreau Leo H.
Davis Jr. James C.
General Electric Company
Nickerson Michael J.
Snyder Marvin
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