Down lighting systems and fixtures therefor

Details Down lighting systems and fixtures therefor Down lighting systems and fixtures therefor

1993-09-16

1995-05-02

Lazarus, Ira S.

Illumination

Automatic substitution of power supply or light source

362 76, 362 84, 362 85, 362148, 362237, 187390, 187414, 340333, 340693, F21V 3300

Patent

active

054125421

ABSTRACT:
An emergency illumination device for elevator cabs and the like that includes a low voltage power source defined by the secondary winding of a stepdown transformer having its primary winding connected across a primary power source. When the primary power source is "on", a charging circuit maintains a constant charge on an emergency battery source while providing battery source power to an emergency alarm device that can be activated by a push button on the control panel of the elevator. When the primary power is off, the emergency battery source is activated by a circuit that will continue to provide power to the alarm device and also will provide general illumination to the interior of the elevator and spot illuminate the push button so that it can be easily located and operated by occupants in need of assistance.

REFERENCES:
patent: 3069509 (1962-12-01), Sherron
patent: 3336473 (1967-08-01), Buzan
patent: 3384886 (1968-05-01), Serra
patent: 3739226 (1973-06-01), Seiter et al.
patent: 3746877 (1973-07-01), Seiter et al.
patent: 3955183 (1976-05-01), McBrian
patent: 4179594 (1979-12-01), Coyle et al.
patent: 4514789 (1985-04-01), Jester
patent: 4678062 (1987-07-01), Sumka
patent: 4708223 (1987-11-01), Orndorff et al.
patent: 4977353 (1990-12-01), Helal et al.
patent: 5145247 (1992-09-01), Mandy

Affiliated with

Also associated with

Rating

Down lighting systems and fixtures therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Down lighting systems and fixtures therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Down lighting systems and fixtures therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1142334