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Class Information
Number: 362/20
Name: Illumination > Automatic substitution of power supply or light source
Description: Subject matter having either (1) one energy source and first and second light sources and means to supply energy from the energy source to the second light source in response to failure of the first light source; or (2) first and second energy sources and one light source and means to cause the second energy source to supply energy to the light source in response to failure of the first energy source; or (3) first and second energy sources and first and second light sources and means to cause the second energy source to supply energy to the second light source in response to failure of either the first energy source or the first light source.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6045232 |
Apparatus for providing emergency and night lighting |
Apr. 4, 2000 |
| 6019477 |
Emergency lighting device |
Feb. 1, 2000 |
| 6010228 |
Wireless emergency safety light with sensing means for conventional light switch or plug receptacle |
Jan. 4, 2000 |
| 6000807 |
Switch cover plate providing automatic emergency lighting |
Dec. 14, 1999 |
| 5988825 |
Housing frame for illuminated signs having multiple configurations |
Nov. 23, 1999 |
| 5980053 |
Illuminating arrangement |
Nov. 9, 1999 |
| 5966069 |
Exit sign self-testing system |
Oct. 12, 1999 |
| 5911499 |
Emergency lighting fixture, especially for hazardous locations |
Jun. 15, 1999 |
| 5910689 |
Generator standby ballast |
Jun. 8, 1999 |
| 5897194 |
Sign with remote power source tester |
Apr. 27, 1999 |
| 5851061 |
Recessed emergency lighting with movable mirror |
Dec. 22, 1998 |
| 5833343 |
Light-source switching and driving unit |
Nov. 10, 1998 |
| 5833350 |
Switch cover plate providing automatic emergency lighting |
Nov. 10, 1998 |
| 5797673 |
Emergency lighting unit/exit sign combination |
Aug. 25, 1998 |
| 5768814 |
Exit sign with removable emergency power pack module |
Jun. 23, 1998 |
| 5746492 |
Emergency light having smoke proof mask |
May. 5, 1998 |
| 5734229 |
Back-up electrical system for portable table lamps |
Mar. 31, 1998 |
| 5713655 |
Emergency safety light |
Feb. 3, 1998 |
| 5676452 |
Operating lamp with main bulb and replacement bulb |
Oct. 14, 1997 |
| 5633564 |
Modular uninterruptible lighting system |
May. 27, 1997 |
| 5574423 |
Self-diagnostic circuit for emergency lamphead |
Nov. 12, 1996 |
| 5546292 |
Hospital corridor lighting/information unit and system |
Aug. 13, 1996 |
| 5539623 |
Lighting device used in an exit sign |
Jul. 23, 1996 |
| 5537299 |
Multiple light system for watercraft and the like |
Jul. 16, 1996 |
| 5526236 |
Lighting device used in an exit sign |
Jun. 11, 1996 |
| 5489891 |
Control means for lighting devices |
Feb. 6, 1996 |
| 5473517 |
Emergency safety light |
Dec. 5, 1995 |
| 5434756 |
Distributed lighting system with fiber optic controls |
Jul. 18, 1995 |
| 5416679 |
Mounting base assembly for a lighting device used in an exit sign |
May. 16, 1995 |
| 5412542 |
Down lighting systems and fixtures therefor |
May. 2, 1995 |
| 5410453 |
Lighting device used in an exit sign |
Apr. 25, 1995 |
| 5408394 |
Down lighting systems and fixtures thereof |
Apr. 18, 1995 |
| 5406461 |
Illumination system for optical equipment with separate illuminating beam paths |
Apr. 11, 1995 |
| 5404002 |
Backup method for multiple source optical scanner |
Apr. 4, 1995 |
| 5379195 |
Lighting fixture |
Jan. 3, 1995 |
| 5365145 |
Emergency lighting system |
Nov. 15, 1994 |
| 5365411 |
Exit signs with LED illumination |
Nov. 15, 1994 |
| 5349330 |
Touch programmable illumination means |
Sep. 20, 1994 |
| 5311410 |
Distributed lighting system with fiber optic controls |
May. 10, 1994 |
| 5303124 |
Self-energizing LED lamp |
Apr. 12, 1994 |
| 5301094 |
Lamp changing assembly for overhead projector |
Apr. 5, 1994 |
| 5272606 |
Dual circuit lantern |
Dec. 21, 1993 |
| 5178446 |
Centralized lighting system for a vehicle having a central light source automatically exchangable in the event of failure |
Jan. 12, 1993 |
| 5174642 |
Remote ballast assembly |
Dec. 29, 1992 |
| 5154504 |
Communications and testing for emergency systems |
Oct. 13, 1992 |
| 5149185 |
Emergency hall lighting |
Sep. 22, 1992 |
| 5148158 |
Emergency lighting unit having remote test capability |
Sep. 15, 1992 |
| 5145247 |
Down lighting systems and fixtures therefor |
Sep. 8, 1992 |
| 5130916 |
Retractable low voltage lighting fixture |
Jul. 14, 1992 |
| 5053929 |
Device for illuminating a bundle of optical fibers |
Oct. 1, 1991 |
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