HID lamp and auxiliary lamp ballast using a single multiple func

Details HID lamp and auxiliary lamp ballast using a single multiple func HID lamp and auxiliary lamp ballast using a single multiple func

1992-11-24

1995-07-04

Pascal, Robert J.

Electric lamp and discharge devices: systems

Automatic substitution of the load device or electrode

315 91, 315 90, 315 92, 315 93, 315159, H05B 3910

Patent

active

054303540

ABSTRACT:
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.

REFERENCES:
patent: 3562580 (1971-02-01), Blomgren
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patent: 3694692 (1972-09-01), Pressman
patent: 3976910 (1976-08-01), Owens et al.
patent: 4005331 (1977-01-01), Horowitz
patent: 4961028 (1990-10-01), Tanaka
patent: 4996463 (1991-02-01), Horowitz
patent: 5008599 (1991-04-01), Counts
patent: 5072156 (1991-12-01), Droho
patent: 5256946 (1993-10-01), Garbowicz et al.

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