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Class Information
Number: 340/642
Name: Communications: electrical > Condition responsive indicating system > Specific condition > Condition of electrical apparatus > Signalling light element > Plural bulbs or filaments
Description: Subject matter where plural lights are monitored.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7602305 |
Feedback circuit for a display sign and method |
Oct. 13, 2009 |
| 7378987 |
Traffic control malfunction management unit with per channel red enable |
May. 27, 2008 |
| 7259685 |
Landing light fault annunciator |
Aug. 21, 2007 |
| 7250872 |
Method and device for testing at least one LED strip |
Jul. 31, 2007 |
| 7109886 |
Traffic control malfunction management unit with co-channel monitoring |
Sep. 19, 2006 |
| 7102540 |
Remote access of an airport airfield lighting system |
Sep. 5, 2006 |
| 7046132 |
Lamp monitor and method for operating a lamp monitor |
May. 16, 2006 |
| 7023353 |
Warning device status circuit including a status output device |
Apr. 4, 2006 |
| 7002453 |
Remote lamp status display via fiber optic system |
Feb. 21, 2006 |
| 6982648 |
Lighting or indicating light unit for a vehicle and lighting or indicating system equipped with at least one such light unit |
Jan. 3, 2006 |
| 6930613 |
Electrical instruments circuits |
Aug. 16, 2005 |
| 6867703 |
Safety-protection circuit |
Mar. 15, 2005 |
| 6788195 |
Light monitor |
Sep. 7, 2004 |
| 6774785 |
Front panel light system for an electronic instrument which indicates the operating condition of the front panel lights and selected portions of the instrument |
Aug. 10, 2004 |
| 6720883 |
Warning device status circuit including a status output device |
Apr. 13, 2004 |
| 6603302 |
Circuit testers |
Aug. 5, 2003 |
| 6583731 |
Fault detection for traffic light systems using electronic lighting elements |
Jun. 24, 2003 |
| 6573840 |
Supervision and control of airport lighting and ground movements |
Jun. 3, 2003 |
| 6556017 |
Deteriorated filament detection |
Apr. 29, 2003 |
| 6515435 |
Pixel mirror based stage lighting system |
Feb. 4, 2003 |
| 6504485 |
Monitoring apparatus and control apparatus for traffic signal lights |
Jan. 7, 2003 |
| 6456091 |
Power line conditioner with voltage and current amplitude tracking |
Sep. 24, 2002 |
| 6392553 |
Signal interface module |
May. 21, 2002 |
| 6300878 |
Constant current regulator using IGBT control |
Oct. 9, 2001 |
| 6243017 |
Method and arrangement for determining remaining operating life of fluorescent lamp |
Jun. 5, 2001 |
| 6218953 |
System and method for monitoring the light level around an ATM |
Apr. 17, 2001 |
| 6184799 |
Monitoring apparatus and control apparatus for traffic signal lights |
Feb. 6, 2001 |
| 6163264 |
Electrical connectors, lamps and lampholders |
Dec. 19, 2000 |
| 6157296 |
Lamp burnout detecting unit with branch connection function |
Dec. 5, 2000 |
| 6147620 |
Remote monitoring of elevator cab lights |
Nov. 14, 2000 |
| 6081189 |
Apparatus for testing the light circuit of a trailer |
Jun. 27, 2000 |
| 6031451 |
Electrical circuits for turn signal, hazard signal and brake signal lights |
Feb. 29, 2000 |
| 6028522 |
System for monitoring the light level around an ATM |
Feb. 22, 2000 |
| 6002330 |
Control system for vehicle lighting |
Dec. 14, 1999 |
| 5977879 |
Display device and an inspection circuit |
Nov. 2, 1999 |
| 5969642 |
Airfield lighting system |
Oct. 19, 1999 |
| 5955945 |
Fail safe system for providing warning signals upon the failure of motorcycle brake or tail lights |
Sep. 21, 1999 |
| 5926115 |
Airfield series circuit communications lighting system and method |
Jul. 20, 1999 |
| 5818338 |
Flood light lamp removal alarm |
Oct. 6, 1998 |
| 5801623 |
Method of detecting a lamp outage condition in a vehicle flasher system |
Sep. 1, 1998 |
| 5801633 |
Combination smoke, carbon monoxide, and hydrocarbon detector |
Sep. 1, 1998 |
| 5774052 |
Monitoring and alerting system for buildings |
Jun. 30, 1998 |
| 5748093 |
Electrical surge protection system with condition monitoring |
May. 5, 1998 |
| 5744961 |
Lamp disconnection detecting device for identifying a specific lamp which has become disconnected |
Apr. 28, 1998 |
| 5736930 |
Apparatus and method for radiation source failure prediction |
Apr. 7, 1998 |
| 5717335 |
Electric bulb short detection apparatus for traffic signal controller |
Feb. 10, 1998 |
| 5646599 |
Failure warning system of electric power unit in vehicle |
Jul. 8, 1997 |
| 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 |
| 5604436 |
Christmas light string circuit tester |
Feb. 18, 1997 |
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