| |
 |
|
Class Information
Number: 315/88
Name: Electric lamp and discharge devices: systems > Automatic substitution of the load device or electrode
Description: Systems having (1) a nonoperating load device connected in the circuit in addition to a load device connected in operating condition in the circuit, or (2) a load device connected in the system which has at least one nonoperating electrode in addition to the electrode or electrodes which are connected in operating relation in the circuit; the system being arranged to operate the operating load device or electrode while the nonoperating load device or electrode is maintained in a nonoperative condition until the first operated load device either fails to operate properly, or is subjected to such excessive voltage or current conditions as would tend to damage the operating load device or electrode, the system being provided with means which operate automatically in response to either such failure of the first operated device or electrodes, or in response to such excessive voltage or current conditions to connect the nonoperating load device or electrode in operative relation in the system whereby such nonoperating load device or electrode is substituted for the first operated device or electrodes.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7397194 |
Auxiliary quartz lamp lighting system for high intensity discharge lamp ballasts |
Jul. 8, 2008 |
| 7276855 |
Auxilary lighting circuit for high intensity discharge system |
Oct. 2, 2007 |
| 7109659 |
High-intensity discharge lamp ballast and method for operating high-intensity discharge lamp |
Sep. 19, 2006 |
| 7034466 |
Standby lighting control for high intensity discharge lamp |
Apr. 25, 2006 |
| 7005805 |
Back light circuit of LCD in an electric refrigerator |
Feb. 28, 2006 |
| 6933678 |
Emergency lighting function illumination appliance |
Aug. 23, 2005 |
| 6781316 |
Vehicle light apparatus |
Aug. 24, 2004 |
| 6756893 |
Light emitting diodes surrounding a vehicle lamp |
Jun. 29, 2004 |
| 6663248 |
Driving circuit for LED lamps |
Dec. 16, 2003 |
| 6534930 |
Discharge lamp lighting circuit with protection circuit |
Mar. 18, 2003 |
| 6525479 |
Method and ballast for operating a lamp fitted with a fluorescent tube |
Feb. 25, 2003 |
| 6498436 |
Method for operating a lamp, particularly for medical applications, and a lamp having a discharge lamp |
Dec. 24, 2002 |
| 6483260 |
Apparatus for operating respective single lamps among multiple lamps coupled to the same ballast |
Nov. 19, 2002 |
| 6476559 |
Ceremonial luminary and associated process |
Nov. 5, 2002 |
| 6417624 |
Lighting system for vehicle |
Jul. 9, 2002 |
| 6281631 |
Vehicle light system circuit which automatically compensates for a light source failure |
Aug. 28, 2001 |
| 6278382 |
Recognition/anti-collision light for aircraft |
Aug. 21, 2001 |
| 5955945 |
Fail safe system for providing warning signals upon the failure of motorcycle brake or tail lights |
Sep. 21, 1999 |
| 5680098 |
Circuit for compensating for failure of a light source in an automotive vehicle |
Oct. 21, 1997 |
| 5646484 |
High reliability incandescent portable illumination system |
Jul. 8, 1997 |
| 5550433 |
Driver circuit for discharge lamps |
Aug. 27, 1996 |
| 5430354 |
HID lamp and auxiliary lamp ballast using a single multiple function switch |
Jul. 4, 1995 |
| 5300863 |
Auxiliary lighting circuit for a gaseous discharge lamp |
Apr. 5, 1994 |
| 5276385 |
High-pressure discharge lamp and lighting method |
Jan. 4, 1994 |
| 5256946 |
Gaseous discharge lamp system with auxiliary lamp |
Oct. 26, 1993 |
| 5216328 |
Vehicle lighting system |
Jun. 1, 1993 |
| 5175469 |
Combination including an emergency lighting arrangement |
Dec. 29, 1992 |
| 5132594 |
Longer-life incandescent lamp |
Jul. 21, 1992 |
| 5115165 |
Safety lighting means for use with a high intensity discharge lamp |
May. 19, 1992 |
| 5023515 |
Redundant lamp control circuit |
Jun. 11, 1991 |
| 5003224 |
Method and a device for replacing incandescent filaments, and a lamp with several filaments |
Mar. 26, 1991 |
| 4988925 |
Omnidirectional metal halide arc discharge lamp |
Jan. 29, 1991 |
| 4961028 |
Lighting equipment |
Oct. 2, 1990 |
| 4862038 |
Automatic relamping system |
Aug. 29, 1989 |
| 4857807 |
Auxiliary light module for vehicles |
Aug. 15, 1989 |
| 4767968 |
System for controlling the operation of electrically powered apparatus |
Aug. 30, 1988 |
| 4742274 |
Adjustable flasher plug for multiple purposes |
May. 3, 1988 |
| 4712051 |
Adapter for switching from primary to standby device upon failure of primary device |
Dec. 8, 1987 |
| 4700110 |
Lamp switching |
Oct. 13, 1987 |
| 4572987 |
Lamp monitoring circuit |
Feb. 25, 1986 |
| 4527095 |
Lamp circuit apparatus |
Jul. 2, 1985 |
| 4486689 |
Emergency lighting apparatus and systems |
Dec. 4, 1984 |
| 4475062 |
Economy device for fluorescent lighting fixtures |
Oct. 2, 1984 |
| 4461974 |
Dual light source |
Jul. 24, 1984 |
| 4458179 |
Controller for lamp having more than one light source |
Jul. 3, 1984 |
| 4399358 |
Photoelectric digital measuring instrument having multiple light sources |
Aug. 16, 1983 |
| 4369366 |
Photoelectric digital measuring instrument balancing circuit |
Jan. 18, 1983 |
| 4170744 |
Combination discharge-incandescent lamp with thermal switch control |
Oct. 9, 1979 |
| 4091307 |
Emergency lighting system for gaseous-discharge lamps |
May. 23, 1978 |
| 4061911 |
Automatically switched spare lamp for a light projector |
Dec. 6, 1977 |
|
|
|
