Light dimming system for emergency operation

Details Light dimming system for emergency operation Light dimming system for emergency operation

1991-06-07

1993-05-25

Mis, David

Electric lamp and discharge devices: systems

Automatic substitution of the power supply

315174, H05B 3702

Patent

active

052143520

ABSTRACT:
An emergency lighting system utilizing standard nonemergency circuitry to provide power to all of the light fixtures in a facility during a power failure. This emergency lighting system uses an electronic inverter to convert d.c. power stored in batteries to either a high or low frequency a.c. power which is supplied to the facility's standard light circuitry. The high or low frequency a.c. power generated by the inverter causes the output voltage of the ballast within each of the facility's fluorescent and/or HID lamps to decrease, thereby reducing the illumination intensity of each of these lamps and saving battery power. Since the incandescent, electroluminescent or L.E.D. exit signs of the facility are generally insensitive to a change in the frequency of the a.c. power, each of these lights continues to operate at full brilliance. Alternatively, a chopper regulator may be used to lower the average voltage level of the power provided to the facility's light circuitry.

REFERENCES:
patent: 3373313 (1968-03-01), Prines et al.
patent: 3836817 (1974-09-01), Herzog
patent: 3869639 (1975-03-01), Herzog
patent: 4477748 (1984-10-01), Grubbs
patent: 4587460 (1986-05-01), Murayama et al.
patent: 4688154 (1987-08-01), Nilssen
patent: 4803406 (1989-02-01), Yasuda
patent: 5099176 (1992-03-01), Fellows et al.

Affiliated with

Also associated with

Rating

Light dimming system for emergency operation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light dimming system for emergency operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light dimming system for emergency operation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-899914