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 |
| 4214185 |
Light sources |
Jul. 22, 1980 |
| 4199803 |
Mercury vapor floodlight fixture assembly and method |
Apr. 22, 1980 |
| 4191990 |
Arrangement for adjusting headlights |
Mar. 4, 1980 |
| 4190777 |
Position sensor for rotatable lamp changer turret |
Feb. 26, 1980 |
| 4177500 |
Power failure light and circuit therefor |
Dec. 4, 1979 |
| 4156891 |
Explosion-proof emergency light |
May. 29, 1979 |
| 4150302 |
Emergency light battery charger circuit |
Apr. 17, 1979 |
| 4071749 |
Self-contained maintenance-free emergency lighting |
Jan. 31, 1978 |
| 4061911 |
Automatically switched spare lamp for a light projector |
Dec. 6, 1977 |
| 4034259 |
Spare lamp control circuit for a light projection system |
Jul. 5, 1977 |
| 4001803 |
Lighting devices |
Jan. 4, 1977 |
| 3964040 |
Circuit for detecting burned-out lamp for a buoy lamp changer |
Jun. 15, 1976 |
|
