Emergency lighting system

Details Emergency lighting system Emergency lighting system

1980-04-21

1982-09-14

Gluck, Irwin

Illumination

Automatic substitution of power supply or light source

307 64, 307 66, 315 86, 362183, 362254, 362802, F21V 1904, H02H 700

Patent

active

043498639

ABSTRACT:
A lighting system for supplying AC power normally, and DC power on an emergency basis selectively, to electron discharge devices, particularly fluorescent lamps; thus, the AC or DC power is furnished over common lines to a high frequency inverter associated with each lamp or lamp fixture; the arrangement is such that substantially no extra wire or wiring is required for the emergency lighting, whether the installation be a new one or retrofitted. In the latter case, new style electronic ballasts replace the old or core type ballasts in those fixtures that are to provide the emergency lighting; such electronic ballasts including the aforesaid inverter capabilities.

REFERENCES:
patent: 3739226 (1973-06-01), Seiter et al.
patent: 4029993 (1977-06-01), Alley et al.
patent: 4034259 (1977-07-01), Schoch
patent: 4056757 (1977-11-01), Mauch et al.
patent: 4150302 (1979-04-01), Roche
patent: 4214185 (1980-07-01), Breeze
patent: 4216410 (1980-08-01), Feldstein
patent: 4223232 (1980-09-01), Bulat

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