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)
08/1989
08/15/1989US4857755 Constant power system and method
07/1989
07/25/1989US4851756 Primary-secondary hybrid battery
07/19/1989EP0324318A1 Device to verify that an apparatus or a circuit is connected to an electric distribution network
07/11/1989US4847899 Power circuit for telephone accessory devices
07/06/1989DE3744162A1 Time switch
07/05/1989CN1004740B Full-automatic speedy electric generating and supplying device with pneumatic starting diesel engine unit
07/04/1989US4845419 Automatic control means providing a low-power responsive signal, particularly for initiating data preservation operation
06/1989
06/29/1989WO1989006060A1 Voltage fault detector
06/27/1989US4843535 Switching power supply
06/27/1989US4843251 Energy storage and supply system
06/22/1989DE3742312A1 Exhaustive discharge protection for the starting batteries of motor vehicles, in particular in passenger cars
06/22/1989DE3742028A1 Method and device for testing the reliability of an energised switching operation in a switching installation
06/21/1989EP0321023A2 Circuit arrangement for a power source
06/20/1989US4841160 Power supply switching circuit
06/08/1989DE3739811A1 Circuit arrangement for protecting the electrical power supply to installations or apparatuses
06/07/1989CN2039092U Power supply device for lighting
06/07/1989CN1004457B Controller for fuel cell power system
06/06/1989US4837779 Communicator and communication method and system
06/06/1989US4836323 Vehicular voltage regulating system
05/1989
05/24/1989EP0316781A1 Dual input low dropout voltage regulator
05/24/1989EP0316314A1 Safety device for car passengers.
05/18/1989WO1989004562A1 Power supply system for segmented loads
05/18/1989DE3836563A1 Drive system for a coolant pump in an atomic power station
05/17/1989EP0315830A1 Power supply for an electronic device using a buffer capacitor
05/10/1989EP0315366A2 A regulated dc power supply having master and slave regulators
05/03/1989EP0313926A2 Asynchronous multiphase switching gear
05/03/1989EP0313743A2 Switching power supply
05/02/1989US4827152 Uninterruptible power supply system
05/02/1989US4827151 Uninterruptible power supply utilizing a synchronized chopper for power factor improvement
05/02/1989US4827150 Uninterruptible power supply inverter circuit
04/1989
04/25/1989US4825349 Emergency D.C. power supply with the emergency state being indicated by polarity reversal
04/18/1989US4823247 Stabilized power supply unit
04/18/1989US4823019 Data processing system
04/13/1989DE3731960A1 Alarm-emitting device
04/11/1989CA1252511A1 Ac voltage stabilizer easily convertible into uninterruptible power supply (ups)
04/04/1989US4818891 Ride-through energy boost circuit
03/1989
03/29/1989EP0309125A2 Uninterruptible power supply
03/29/1989EP0309124A2 Uninterruptible power supply
03/22/1989CN1031913A Frequency-and voltage-stabilizing sine-wave uninterrupted power source
03/21/1989US4814934 Voltage fault detector
03/15/1989CN2034362U Fluorescent lamp for illumination in urgent need
03/14/1989US4812672 Selective connection of power supplies
03/07/1989US4811190 Capacitive boost circuit for extending hold up time
03/07/1989US4811163 Automatic power bus transfer equipment
03/07/1989US4811136 Phase controller for processing current and voltage faults
02/1989
02/23/1989WO1989001719A1 Integrated uninterruptible power supply for personal computers
02/21/1989US4807102 Alternating current electrical power supply circuit
02/21/1989US4806789 Power select circuit
02/09/1989WO1989001256A1 Electric power supply device with regulated alternating-current voltage output
01/1989
01/25/1989EP0300091A2 Multiple time delay power controller apparatus with time delay turn-on and turn-off
01/25/1989CN2031588U Bidirectional silicon-controlled self close loop wire box
01/18/1989EP0299323A1 Power supply arrangement
01/17/1989US4799039 Emergency lighting supervisory system
01/10/1989US4797567 Shutter control apparatus
01/03/1989US4795914 Power supply circuit with backup function
12/1988
12/29/1988DE3719869A1 Device for supplying power to an electronic signal processing stage
12/22/1988DE3813868A1 No-break current supply system
12/22/1988DE3719007A1 Changeover apparatus
12/21/1988EP0295556A2 Electric system
12/14/1988EP0294394A1 Peak power shaving apparatus and method.
12/13/1988CA1246670A1 Uninterruptible power supply
12/06/1988US4789790 Digital equipment
12/01/1988DE3707901C1 Power supply device for monitoring installations on high-voltage pylons
11/1988
11/29/1988US4788451 AC voltage stabilizer easily convertible into uninterruptible power supply (UPS)
11/29/1988US4788450 Backup power switch
11/29/1988CA1245716A1 A.c. motor-generator
11/22/1988CA1245383A1 Backup battery power supply for microprocessor based telephone
11/17/1988WO1988009075A1 Circuit to inhibit voltage and current returns to the electric power distribution line in an inverter-type power plant
11/16/1988CN88102480A Emergency d.c. power supply with emergency state being indicated by polarity reversal
11/15/1988US4785227 Mobile emergency medical vehicle
11/10/1988DE3714193A1 Spannungsversorgung fuer elektronische geraete, insbesondere fuer sicherheitsrelevante geraete in kraftfahrzeugen Power supply for electronic devices, especially for safety-related equipment at in motor vehicles
11/08/1988US4783728 Modular power supply with PLL control
11/08/1988US4783619 Method and apparatus for maintaining auto voltage
11/03/1988WO1988008380A1 Power supply for electronic devices, in particular for safety-related devices in motor vehicles
11/02/1988EP0289387A1 Direct current power supply aided by an emergency condition indication by inversion
11/02/1988EP0289268A2 Power status monitor for electronic system
11/01/1988US4782241 Uninterruptible power supply apparatus and power path transfer method
10/1988
10/26/1988EP0288169A2 Control system
10/26/1988EP0287863A2 Power select circuit
10/25/1988US4780801 Uninterruptible power supply apparatus
10/20/1988WO1988008218A1 Supply system for uninterruptible electric power
10/18/1988US4779050 Circuit arrangement for judging the lifetime of a battery in a no-break power supply system
10/18/1988US4779037 Dual input low dropout voltage regulator
10/18/1988US4779007 Uninterrupted power supply system
09/1988
09/28/1988EP0284541A2 Uninterruptible power supply
09/28/1988EP0284479A1 Method and emergency power supply for alleviating power supply interruptions
09/27/1988US4774450 Stabilized power-supply circuit connectable with auxiliary electric source without an intermediary blocking diode
09/20/1988US4772999 Static converter, especially for an uninterruptible electrical power supply system
09/13/1988US4771312 Image forming apparatus having a battery
09/07/1988WO1988006814A1 IMPROVEMENTS IN OR RELATING TO D.C. to A.C. INVERTERS
09/06/1988US4769555 Multi-time delay power controller apparatus with time delay turn-on and turn-off
08/1988
08/31/1988EP0280409A1 Alternative source system
08/30/1988CA1241425A1 Uninterruptible power supply with isolated bypass winding
08/23/1988US4766364 Parallel power systems
08/10/1988CN88100601A Full-automatic speedy electric generating and supplying device with pneumatic starting diesel engine unit
08/09/1988US4763014 Backup protection switch to prevent reverse power flow in a UPS
08/09/1988US4763013 Backup protection switch to prevent reverse power flow in a UPS
08/02/1988US4761563 Asynchronous multiphase switching gear
07/1988
07/26/1988US4760322 Power-supply/battery back-up power supply/battery charger combination
07/26/1988US4760277 Computer backup power supply with keyboard lighting
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