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Class Information
Number: 315/86
Name: Electric lamp and discharge devices: systems > Automatic substitution of the power supply
Description: Systems provided with at least two sources of electrical energy and at least one load device, and provided with means for supplying energy to operate a load device from one of the sources of electrical energy while the other source of electrical energy is maintained in a nonsupplying condition, and having means which operate automatically in response to some condition affecting the operation of the system to connect the nonsupplying source of energy in the system so that it can become operative to supply energy to either the same load device or a different load device than the load device supplied by the first operated source of electrical energy.










Sub-classes under this class:

Class Number Class Name Patents
315/87 With load device or electrode substitution 30


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8692485 Intelligent electrical systems for powering electrical circuits Apr. 8, 2014
8629617 Electrical wiring device Jan. 14, 2014
8629618 Backup lighting apparatus Jan. 14, 2014
8629574 Ballast for fluorescent emergency lighting Jan. 14, 2014
8624506 Lighting device Jan. 7, 2014
8604695 Automatic backup lighting system Dec. 10, 2013
8587201 Emergency power supply circuit for dimmable electronic ballasts and related method Nov. 19, 2013
8575856 Driver circuit for powering a DC lamp in a non-DC lamp fitting Nov. 5, 2013
8558458 Exit light and emergency light which have function to indicate residual charge of battery Oct. 15, 2013
8558407 Elevator emergency LED lighting power supply assembly Oct. 15, 2013
8536791 Solar power supply device Sep. 17, 2013
8519626 LED night light/LED emergency light Aug. 27, 2013
8497478 High voltage supply to increase rise time of current through light source in an optical sensor system Jul. 30, 2013
8476834 Automatic lighting control system Jul. 2, 2013
8463481 Dual mode range extended electric vehicle Jun. 11, 2013
8463480 Dual mode range extended electric vehicle Jun. 11, 2013
8456090 Power failure reporting in a networked light Jun. 4, 2013
8428806 Dual mode range extended electric vehicle Apr. 23, 2013
8346419 Operation of a range extended electric vehicle Jan. 1, 2013
8333481 LED emergency light Dec. 18, 2012
8330377 Monitoring voltage to track temperature in solid state light modules Dec. 11, 2012
8310175 Modular lamp system Nov. 13, 2012
8299726 OMNI voltage direct current power supply Oct. 30, 2012
8299712 Light unit with internal power failure detection Oct. 30, 2012
8299717 Outdoor LED system Oct. 30, 2012
8274227 High-efficiency DC ballast arrangement with automatic polarity protection and emergency back-up for lighting fixture in a suspended DC-powered ceiling system Sep. 25, 2012
8258705 Scotopically enhanced emergency light and control thereof Sep. 4, 2012
8247991 Lighting delay circuit Aug. 21, 2012
8217591 Power source sensing dimming circuits and methods of operating same Jul. 10, 2012
8217578 LED lighting arrangement Jul. 10, 2012
8183783 Power failure reporting in a networked light May. 22, 2012
8120260 Wireless convenience lighting system and method of making same Feb. 21, 2012
8115397 Power failure reporting in a networked light Feb. 14, 2012
8100545 Wireless convenience lighting system and method of making same Jan. 24, 2012
8089218 Lighting devices Jan. 3, 2012
8079728 Indicator test switch for downlight lighting device and bracket therefor Dec. 20, 2011
8076855 Combination emergency light and nightlight Dec. 13, 2011
8018161 Light unit with internal back-up power supply, communications and display Sep. 13, 2011
8018130 Low-pressure mercury vapor discharge lamp with amalgam Sep. 13, 2011
8004198 Resetting an electronic ballast in the event of fault Aug. 23, 2011
7960920 Omni voltage direct current power supply Jun. 14, 2011
7915829 Remotely monitored and controlled distributed emergency power system Mar. 29, 2011
7880391 False failure prevention circuit in emergency ballast Feb. 1, 2011
7863832 Equipment and methods for emergency lighting that provides brownout detection and protection Jan. 4, 2011
7737640 Emergency lighting system Jun. 15, 2010
7728525 Relamping circuit for battery powered ballast Jun. 1, 2010
7703934 Power outage light socket device Apr. 27, 2010
7671538 Method and system for economical emergency activation of electrical devices Mar. 2, 2010
7641358 Explosion proof lantern Jan. 5, 2010
7638948 Apparatus and method for detecting failure in an emergency lighting lamphead Dec. 29, 2009

1 2 3 4 5










 
 
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