Electric lamp and discharge devices: systems – Automatic substitution of the power supply
Patent
1998-05-07
1999-11-16
Philogene, Haissa
Electric lamp and discharge devices: systems
Automatic substitution of the power supply
315171, 315136, 315DIG7, H05B 3700
Patent
active
059864079
ABSTRACT:
A control apparatus for an ac-powered lamp unit includes a charging circuit for generating a constant current output from an ac power source, a storage battery charged by the constant current output and supplying a dc voltage output, a first high-voltage oscillator circuit for converting the dc voltage output of the storage battery into a first high-voltage oscillating signal, a second high-voltage oscillator circuit for generating a dc voltage signal from the ac power source and for converting the dc voltage signal into a second high-voltage oscillating signal, a switch circuit connected to the first and second high-voltage oscillator circuits, and a switch control circuit for controlling the switch circuit to provide the second high-voltage oscillating signal from the second high-voltage oscillator circuit to an ac-powered lamp unit when the ac power source is available, and to provide the first high-voltage oscillating signal from the first high-voltage oscillator circuit to the ac-powered lamp unit in case of a power outage.
REFERENCES:
patent: 3599070 (1971-08-01), Davis et al.
patent: 3684891 (1972-08-01), Sieron
patent: 3688123 (1972-08-01), Walker
patent: 4890004 (1989-12-01), Beckerman
patent: 5015919 (1991-05-01), Vila-Masot et al.
Philogene Haissa
Tasua Electronics Co., Ltd.
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