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Class Information
Number: 315/91
Name: Electric lamp and discharge devices: systems > Automatic substitution of the load device or electrode > Over-voltage or over-current controlled substitution
Description: Systems provided with means for automatically substituting the nonoperating load device or electrode for the first to operate load device or electrode in response to excessive voltage or current conditions as would tend to damage the first to operate load device or electrode.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6788000 |
Distributed emergency lighting system having self-testing and diagnostic capabilities |
Sep. 7, 2004 |
| 6653790 |
Automatic gas lamp with safety control circuit |
Nov. 25, 2003 |
| 6549246 |
Method for driving projection cathode ray tube |
Apr. 15, 2003 |
| 6476559 |
Ceremonial luminary and associated process |
Nov. 5, 2002 |
| 6118371 |
Adaptive vehicle lighting control system |
Sep. 12, 2000 |
| 5666029 |
Fluorescent emergency ballast self test circuit |
Sep. 9, 1997 |
| 5646484 |
High reliability incandescent portable illumination system |
Jul. 8, 1997 |
| 5493180 |
Lamp protective, electronic ballast |
Feb. 20, 1996 |
| 5453666 |
High intensity discharge lamp ballast having a transient protected power factor correction scheme |
Sep. 26, 1995 |
| 5430354 |
HID lamp and auxiliary lamp ballast using a single multiple function switch |
Jul. 4, 1995 |
| 5418435 |
Light controller with overload current protection circuit |
May. 23, 1995 |
| 5256946 |
Gaseous discharge lamp system with auxiliary lamp |
Oct. 26, 1993 |
| 4961028 |
Lighting equipment |
Oct. 2, 1990 |
| 4897573 |
Electric incandescent lamp having discharge arc conductor and discharge arc interruption fuse |
Jan. 30, 1990 |
| 4785390 |
Instantaneous failure compensation circuit |
Nov. 15, 1988 |
| 4752719 |
Boosted D.C. supply circuit and luminaire employing same |
Jun. 21, 1988 |
| 4560906 |
Lighting system and compact electric lighting unit |
Dec. 24, 1985 |
| 4517498 |
Sequence start lamp ballast with current spike suppression means |
May. 14, 1985 |
| 4439801 |
Electrical load imbalance detection and protection apparatus |
Mar. 27, 1984 |
| 4438365 |
Spark gap for line transient protection |
Mar. 20, 1984 |
| 4278916 |
Instant-on light source |
Jul. 14, 1981 |
| 4232252 |
Lighting network including a gas discharge lamp and standby lamp |
Nov. 4, 1980 |
| 4104560 |
Lighting system for a motor vehicle |
Aug. 1, 1978 |
| 4047076 |
Emergency lighting system for gaseous discharge lamps |
Sep. 6, 1977 |
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