Resources Contact Us Home
Browse by Category: Main > Electrical & Energy
Class Information
Number: 315/131
Name: Electric lamp and discharge devices: systems > With signal, indicator, or alarm > Plural load device systems > Selective indication of the load device
Description: Systems having the signal, indicator, or alarm means so arranged that the condition of any one of two or more of the load devices or of their supply circuits will be indicated by the signal, indicator or alarm means.

Sub-classes under this class:

Class Number Class Name Patents
315/132 Plural signals, indicators, or alarms 26

Patents under this class:

Patent Number Title Of Patent Date Issued
8624504 Stairway light for work vehicle Jan. 7, 2014
8587201 Emergency power supply circuit for dimmable electronic ballasts and related method Nov. 19, 2013
8508331 Electronic device and method of controlling the same Aug. 13, 2013
8502456 Managing light system energy use Aug. 6, 2013
8310161 End of life indicator for lamps Nov. 13, 2012
8274233 Load control device having a visual indication of energy savings and usage information Sep. 25, 2012
8264155 Solid state lighting devices providing visible alert signals in general illumination applications and related methods of operation Sep. 11, 2012
8260575 Light management system having networked intelligent luminaire managers Sep. 4, 2012
8140276 System and method for streetlight monitoring diagnostics Mar. 20, 2012
8076859 Emergency sign power supply with battery charger Dec. 13, 2011
7761260 Light management system having networked intelligent luminaire managers with enhanced diagnostics capabilities Jul. 20, 2010
7760107 Method for programming a network of control points Jul. 20, 2010
7671538 Method and system for economical emergency activation of electrical devices Mar. 2, 2010
7638948 Apparatus and method for detecting failure in an emergency lighting lamphead Dec. 29, 2009
7571063 Lighting performance power monitoring system and method with optional integrated light control Aug. 4, 2009
7501769 Light fixture with a diagnostic ballast Mar. 10, 2009
7333903 Light management system having networked intelligent luminaire managers with enhanced diagnostics capabilities Feb. 19, 2008
7312695 Apparatus and method for displaying operating characteristics on status indicators Dec. 25, 2007
6917164 Light signaling device related to the operating state of a system Jul. 12, 2005
6897787 Method and apparatus for composing an illumination pattern May. 24, 2005
6885297 Process for management of a light signaling device, and a device using this process, particularly for avionics Apr. 26, 2005
6717367 Emergency lighting arrangement and apparatus Apr. 6, 2004
6717660 System for monitoring and testing of light sources Apr. 6, 2004
6448716 Solid state light with self diagnostics and predictive failure analysis mechanisms Sep. 10, 2002
6426593 Method and apparatus for illuminating two dependent indicators with a single output pin Jul. 30, 2002
6246186 Method and apparatus for controlling two independent visual indicators with a single output pin Jun. 12, 2001
5625260 Systems and methods for transmitting pulse signals Apr. 29, 1997
5578998 Method and apparatus for predicting of lamp failure Nov. 26, 1996
5397963 Subsystem and method for detecting lamp failure Mar. 14, 1995
5266840 Circuit for detecting the failure of a load which is connected in series with an electronic switch Nov. 30, 1993
5168198 Lamplight failure detection system Dec. 1, 1992
5099177 Lamp circuit with disconnected lamp detecting device Mar. 24, 1992
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
4767968 System for controlling the operation of electrically powered apparatus Aug. 30, 1988
4691143 Circuit status indicating device with improved switch on/off detection capability Sep. 1, 1987
4396868 Lamp circuit with disconnected lamp detecting device Aug. 2, 1983
4138627 Current-level-sensitive switching system Feb. 6, 1979
4104560 Lighting system for a motor vehicle Aug. 1, 1978
4017847 Luminous indicator with zero standby power Apr. 12, 1977
3952229 Display device having signal lamps Apr. 20, 1976

  Recently Added Patents
Optimized delivery of web application code
Data feed management
Signal activated molecular delivery
Vehicle, toy, and/or replicas thereof
Probe for ultrasound diagnostic apparatus
Power supply system for motor vehicle
Imaging device and imaging method
  Randomly Featured Patents
Central thermostat
Illumination optical system and exposure apparatus including the same
Method and apparatus for wirelessly establishing user preference settings on a computer
Photosensitive resin composition
Rear combination lamp for automobile
Power controller
Liquid cooled anode x-ray tubes
Travel mug
Shock calcined aluminosilicate zeolites
Perfumable dry cleaning and spot removal process