| |
 |
|
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 |
| 5032962 |
Redundant lamp mechanism |
Jul. 16, 1991 |
| 5032961 |
Ground light system for a landing strip |
Jul. 16, 1991 |
| 5025349 |
Emergency lighting fixture |
Jun. 18, 1991 |
| 5022613 |
AC and battery backup supply for a railroad crossing gate |
Jun. 11, 1991 |
| 5023515 |
Redundant lamp control circuit |
Jun. 11, 1991 |
| 5003432 |
Down lighting systems and fixtures therefor |
Mar. 26, 1991 |
| 4985661 |
Uninterrupted desk lamp |
Jan. 15, 1991 |
| 4975810 |
Light source |
Dec. 4, 1990 |
| 4890200 |
Down lighting systems and fixtures therefor |
Dec. 26, 1989 |
| 4821154 |
Multi-bulb light source |
Apr. 11, 1989 |
| 4802065 |
Emergency lighting fixture |
Jan. 31, 1989 |
| 4782429 |
Long-life luminaires |
Nov. 1, 1988 |
| 4764853 |
Rechargeable battery cafe table lamp |
Aug. 16, 1988 |
| 4757426 |
Illumination system for fiber optic lighting instruments |
Jul. 12, 1988 |
| 4755804 |
System for feeding and controlling low intensity obstruction lights |
Jul. 5, 1988 |
| 4727291 |
Back-up electrical system for lamps |
Feb. 23, 1988 |
| 4708223 |
Emergency lighting for elevator cab |
Nov. 24, 1987 |
| 4682078 |
Wireless emergency lighting unit |
Jul. 21, 1987 |
| 4631649 |
Plug-in emergency light fixture |
Dec. 23, 1986 |
| 4600972 |
Emergency lighting apparatus |
Jul. 15, 1986 |
| 4597033 |
Flexible elongated lighting system |
Jun. 24, 1986 |
| 4587597 |
Emergency exit light or the like |
May. 6, 1986 |
| RE31987 |
Automatic lamp bulb changer for signal lamps |
Sep. 17, 1985 |
| 4539625 |
Lighting system combining daylight concentrators and an artificial source |
Sep. 3, 1985 |
| 4514789 |
Illuminated light switch plate with LED and oscillator circuit |
Apr. 30, 1985 |
| 4504894 |
Lighting unit for providing indirect light |
Mar. 12, 1985 |
| 4504892 |
Art lighting system with stepwise creation and display of workpiece |
Mar. 12, 1985 |
| 4463283 |
Rechargeable lamp assembly, mounting unit, and circuit therefor |
Jul. 31, 1984 |
| 4463410 |
Lighting device with dual reflecting members |
Jul. 31, 1984 |
| 4461974 |
Dual light source |
Jul. 24, 1984 |
| 4446507 |
Automobile headlight control system |
May. 1, 1984 |
| 4441143 |
Photo voltaic lighting for outdoor telephone booth |
Apr. 3, 1984 |
| 4435743 |
Edge lighted sign |
Mar. 6, 1984 |
| 4422069 |
System for indicating an emergency exit |
Dec. 20, 1983 |
| 4415951 |
Lampchanger |
Nov. 15, 1983 |
| 4414611 |
Portable light |
Nov. 8, 1983 |
| 4410835 |
Utility emergency lamp and solid state switching and battery charging circuit therefor |
Oct. 18, 1983 |
| 4410929 |
Linear motion switch assembly particularly adapted for use with fiber optic light sources |
Oct. 18, 1983 |
| 4402038 |
Automatic lamp bulb changer for signal lamps |
Aug. 30, 1983 |
| 4399358 |
Photoelectric digital measuring instrument having multiple light sources |
Aug. 16, 1983 |
| 4369366 |
Photoelectric digital measuring instrument balancing circuit |
Jan. 18, 1983 |
| 4349863 |
Emergency lighting system |
Sep. 14, 1982 |
| 4281365 |
Variable photoelectric cell |
Jul. 28, 1981 |
| 4246477 |
Artificial and solar lighting system |
Jan. 20, 1981 |
| 4245282 |
Illuminating device |
Jan. 13, 1981 |
| 4225901 |
Lampchanger for a light |
Sep. 30, 1980 |
| 4223232 |
Battery charging circuit for an emergency system |
Sep. 16, 1980 |
| 4218725 |
Emergency light |
Aug. 19, 1980 |
| 4217626 |
Automobile headlight change system |
Aug. 12, 1980 |
| 4214185 |
Light sources |
Jul. 22, 1980 |
|
|
|
