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Class Information
Number: 315/130
Name: Electric lamp and discharge devices: systems > With signal, indicator, or alarm > Plural load device systems
Description: Systems having a plurality of load devices connected in the system.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7629601 |
LED flasher |
Dec. 8, 2009 |
| 7560875 |
Balancing transformers for multi-lamp operation |
Jul. 14, 2009 |
| 7425798 |
Intelligent light degradation sensing LED traffic signal |
Sep. 16, 2008 |
| 7394203 |
Method and system for open lamp protection |
Jul. 1, 2008 |
| 7268497 |
Lighting device with night light and human body sensing capability |
Sep. 11, 2007 |
| 7238326 |
Germicidal treatment system with status indicator |
Jul. 3, 2007 |
| 7190120 |
Airport strobe light monitoring system |
Mar. 13, 2007 |
| 7102540 |
Remote access of an airport airfield lighting system |
Sep. 5, 2006 |
| 7068188 |
Runway approach lighting system and method |
Jun. 27, 2006 |
| 6965203 |
Method and circuit for repetitively firing a flash lamp or the like |
Nov. 15, 2005 |
| 6917164 |
Light signaling device related to the operating state of a system |
Jul. 12, 2005 |
| 6885297 |
Process for management of a light signaling device, and a device using this process, particularly for avionics |
Apr. 26, 2005 |
| 6762563 |
Module for powering and monitoring light-emitting diodes |
Jul. 13, 2004 |
| 6717660 |
System for monitoring and testing of light sources |
Apr. 6, 2004 |
| 6664736 |
Method and system for indicating bulb circuit failure |
Dec. 16, 2003 |
| 6504485 |
Monitoring apparatus and control apparatus for traffic signal lights |
Jan. 7, 2003 |
| 6448716 |
Solid state light with self diagnostics and predictive failure analysis mechanisms |
Sep. 10, 2002 |
| 6300878 |
Constant current regulator using IGBT control |
Oct. 9, 2001 |
| 6184799 |
Monitoring apparatus and control apparatus for traffic signal lights |
Feb. 6, 2001 |
| 6078257 |
Current detector flood light lamp removal alarm |
Jun. 20, 2000 |
| 5969642 |
Airfield lighting system |
Oct. 19, 1999 |
| 5955844 |
Smart logic switching uninterruptible power source |
Sep. 21, 1999 |
| 5926115 |
Airfield series circuit communications lighting system and method |
Jul. 20, 1999 |
| 5644304 |
Automatic control system of lights in a series circuit illumination plant, in particular lights for airport signalling |
Jul. 1, 1997 |
| 5638057 |
Ground fault detection and measurement system for airfield lighting system |
Jun. 10, 1997 |
| 5625260 |
Systems and methods for transmitting pulse signals |
Apr. 29, 1997 |
| 5485151 |
Airfield lighting system |
Jan. 16, 1996 |
| 5426429 |
Supervision and control of airport lighting and ground movements |
Jun. 20, 1995 |
| 5397963 |
Subsystem and method for detecting lamp failure |
Mar. 14, 1995 |
| 5387909 |
Lamp sensing system for traffic lights |
Feb. 7, 1995 |
| 5359325 |
Automatic monitoring system for airfield lighting systems |
Oct. 25, 1994 |
| 5248967 |
Method and apparatus for monitoring electrical devices |
Sep. 28, 1993 |
| 5243340 |
Supervision and control of airport lighting and ground movements |
Sep. 7, 1993 |
| 5168198 |
Lamplight failure detection system |
Dec. 1, 1992 |
| 5099177 |
Lamp circuit with disconnected lamp detecting device |
Mar. 24, 1992 |
| 5057814 |
Electrical malfunction detection system |
Oct. 15, 1991 |
| 5034659 |
Lamp circuit with disconnected lamp detecting device |
Jul. 23, 1991 |
| 4977353 |
Communication system for single point emergency lighting |
Dec. 11, 1990 |
| 4945280 |
Independent emergency lighting system with self-diagnosis |
Jul. 31, 1990 |
| 4792701 |
Failure compensation circuit with thermal compensation |
Dec. 20, 1988 |
| 4769579 |
Flicker-control device with polarized lamp |
Sep. 6, 1988 |
| 4754201 |
Magnetic low load factor series ballast circuit |
Jun. 28, 1988 |
| 4745339 |
Lamp failure detecting device for automobile |
May. 17, 1988 |
| 4675574 |
Monitoring device for airfield lighting system |
Jun. 23, 1987 |
| 4558262 |
Load switching arrangement for gas discharge lamp circuit |
Dec. 10, 1985 |
| 4449073 |
Runway approach lighting system with fault monitor |
May. 15, 1984 |
| 4408142 |
Device for the control of the luminous flux from a main beam bulb in a motor vehicle |
Oct. 4, 1983 |
| 4396868 |
Lamp circuit with disconnected lamp detecting device |
Aug. 2, 1983 |
| 4348613 |
Lamp failure indicating circuit |
Sep. 7, 1982 |
| 4323841 |
Indicating device for use in airfield lighting plants technical field |
Apr. 6, 1982 |
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