Emergency lighting ballast for compact fluorescent lamps with in

Details Emergency lighting ballast for compact fluorescent lamps with in Emergency lighting ballast for compact fluorescent lamps with in

1989-06-30

1991-04-02

Laroche, Eugene R.

Electric lamp and discharge devices: systems

Automatic substitution of the power supply

315171, 315207, 315DIG7, 315360, H05B 3700

Patent

active

050049534

ABSTRACT:
A method and circuit for operating a fluorescent lamp having a starter with power supplied by a battery by generating an alternating current from energy supplied by the battery; supplying the alternating current as a starting current to the lamp for a selected period of time; and, at the end of the selected period of time, generating a direct current from the alternating current and supplying the direct current to the lamp in place of the alternating current.

REFERENCES:
patent: 3688123 (1972-08-01), Walker
patent: 4029993 (1977-06-01), Alley
patent: 4587460 (1986-05-01), Murayama
patent: 4803406 (1989-02-01), Yasuda
patent: 4887007 (1989-12-01), Almering

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