Patents
Sitemap › H02 - Generation, conversion, or distribution of electric power › H02J - Circuit arrangements or systems for supplying or distributing electric power; Systems for storing electric energy › H02J 9 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
Patents for H02J 9 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting (16,437)
04/1981
04/28/1981US4264855 Electrical power supply equipment for motor vehicles
04/24/1981EP0020725A4 Phase control arrangement to limit output signal transients during power source substitution in an uninterruptible power supply.
04/22/1981EP0027254A1 Automatic checking arrangement for electrical appliances and installations which contain rechargeable batteries to keep them functioning in case of mains failure
04/14/1981US4262214 System for switching a load between two sources
03/1981
03/31/1981US4258968 Generator adaptor
03/11/1981EP0024448A1 Device for feeding power consumption units, particularly in a rail vehicle
03/10/1981US4255746 Emergency lighting and fire detector system
03/10/1981US4255697 Cash register power supply system
01/1981
01/22/1981WO1981000159A1 Output voltage-drop detecting apparatus
01/20/1981US4246633 Voltage control circuitry for UPS
01/13/1981CA1093669A1 Multiple power source automatic switching circuitry
01/07/1981EP0020725A1 Phase control arrangement to limit output signal transients during power source substitution in an uninterruptible power supply.
12/1980
12/23/1980US4241261 Circuit control to limit power drain of auxiliary power supply in UPS system
12/10/1980EP0019932A1 Continuous power source with bi-directional converter
12/09/1980US4238691 Phase control arrangement to limit output signal transients during power source substitution in an uninterruptible power supply
12/09/1980US4238690 AC-DC switching regulator to supply uninterruptible power
12/09/1980US4238688 Three-phase uninterruptible power supply maintaining reserve energy sources in idling condition with unbalanced loads
12/02/1980US4237385 Control of power supply
12/02/1980CA1090883A1 Rapid power transfer system
11/1980
11/26/1980EP0019222A1 Circuit for electrically connecting a volatile memory to a power supply input terminal
11/13/1980WO1980002478A1 Emergency power source
11/12/1980EP0018521A1 Device for the uninterrupted supply of alternating current to consumers
10/1980
10/29/1980EP0017892A1 Automatic switching device for parallel charging and series discharging of two batteries
10/28/1980US4231029 Automatic transfer control device and frequency monitor
10/28/1980US4231028 Ready indicator for high-voltage switchgear
10/07/1980US4227257 Power supply circuit for an electronic tuning type receiver with a memory element
09/1980
09/30/1980US4225793 Arrangement for monitoring a current network
09/30/1980US4225792 Detector circuit
09/16/1980US4223232 Battery charging circuit for an emergency system
09/02/1980US4220872 DC power supply circuit
09/02/1980US4220868 Method of and system for controllably connecting load to generator
08/1980
08/20/1980EP0014415A2 Process for regulating parallel connected dc/ac converters and circuits for the application of said process
08/05/1980US4216410 Emergency lighting system
07/1980
07/22/1980US4214185 Light sources
07/10/1980WO1980001443A1 Phase synchronism system for power source transfer
06/1980
06/24/1980US4209710 Battery back-up regulator
06/17/1980US4208715 Dual data processing system
05/1980
05/13/1980US4203041 Battery/mains generator set for the production of interruption-free current
05/01/1980WO1980000899A1 Circuit control to limit power drain of auxiliary power supply
04/1980
04/22/1980US4199754 Circuit for an emergency lighting and fire detector system
04/16/1980EP0009606A1 Apparatus for controlling the charging of a battery
04/15/1980CA1075820A1 Power supply interruption detecting circuit
04/01/1980CA1074851A1 Solid state device for lighting fluorescent tubes in emergency
03/1980
03/18/1980CA1073969A1 Stored energy module
03/18/1980CA1073968A1 Battery back-up system for electromagnets
02/1980
02/19/1980US4189649 Control panel for automatic transfer switch
02/19/1980CA1072198A1 Automatic transfer control device and voltage sensor
02/19/1980CA1072197A1 Automatic transfer control device and frequency monitor
01/1980
01/29/1980US4186312 AC Electrical power systems with alternate sources of power
01/22/1980US4185203 Closed loop rotational speed control system for twin-shaft type gas turbine electric generator
01/01/1980US4181842 D.C. monitoring circuit
12/1979
12/25/1979US4180745 Power regulating supply system for AC electrical loads
12/04/1979US4177389 Power supply system with two regulated power supply devices connected in parallel at an output
11/1979
11/13/1979CA1066398A1 Battery backup for ac powered dc supply
10/1979
10/30/1979US4172981 Lighting system
10/30/1979US4172692 Pumping plant fly wheel hydraulic surge protector
09/1979
09/25/1979CA1063248A1 Microprogram-interrupted computer
09/18/1979US4168459 Non-interruptible power supply systems
09/11/1979US4167680 Emergency standby system for automatic transfer from utility power to a battery powered system
07/1979
07/31/1979CA1059583A1 Monitoring device
07/25/1979EP0003152A1 Battery back-up system for a data processor
07/17/1979US4161674 Overvoltage protected fluorescent tube supply circuit
05/1979
05/15/1979US4155081 Rechargeable battery backup power source for an ionization smoke detector device
05/08/1979CA1054217A1 Battery isolator
05/01/1979CA1053792A1 Automatic transfer switch
05/01/1979CA1053753A1 No-break ac power supply
05/01/1979CA1053750A1 Interruption-free power supply
04/1979
04/17/1979US4150302 Emergency light battery charger circuit
04/10/1979US4149093 Battery protection device
03/1979
03/20/1979US4145618 Arrangement for providing auxiliary energy source for static inverter used with traction motor drive during power interruption
03/13/1979US4144462 Emergency lighting fluorescent pack
03/06/1979US4143283 Battery backup system
01/1979
01/30/1979US4137557 Automatic cut-out device
01/30/1979US4137492 Stored energy module
10/1978
10/31/1978CA1041649A1 Automatic transfer switch
10/31/1978CA1041595A1 Emergency lighting system
10/24/1978US4122541 Non-volatile memory device
10/24/1978US4122516 Inverter control apparatus
10/24/1978US4122359 Memory protection arrangement
10/17/1978CA1040713A1 Lighting devices
09/1978
09/26/1978US4117373 Emergency/normal lighting circuit for a gaseous discharge lamp
09/19/1978US4115704 Parametric energy coupled uninterruptible power supply
09/12/1978US4114048 Load balancing system for ups rectifiers
08/1978
08/01/1978US4104539 Parallel redundant and load sharing regulated AC system
07/1978
07/11/1978US4099692 Transfer apparatus for energy sources
07/04/1978US4099068 Power supply interruption detecting circuit
06/1978
06/20/1978US4096410 Inverter circuit protection
06/20/1978US4096395 Automatic transfer control device and voltage sensor
06/20/1978US4096394 Apparatus for supplying electrical energy to a load
05/1978
05/16/1978US4090090 Automatic transfer control device and frequency monitor
05/09/1978US4088940 Device for cutting out loads in a generator and battery fed plant
05/02/1978US4087734 Charging circuit for combination trolley and battery powered locomotives
05/02/1978US4087697 Rapid power transfer system
04/1978
04/25/1978US4086524 Charge monitor for electric battery
04/18/1978US4085311 Memory device with error prevention of data during power failure
04/18/1978CA1029843A1 Feeding apparatus with dual feed source
03/1978
03/28/1978US4081692 Apparatus for supplementing commercial power subject to brownout and blackout failures
03/21/1978US4080558 Defibrillator battery charger
02/1978
02/21/1978US4075503 Emergency lighting system
02/21/1978US4075502 Monitoring device
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