Patents
Patents for H02H 11 - Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result (2,416)
06/1991
06/12/1991CN1052224A Automatic protector of refrigerator
05/1991
05/23/1991DE4008161C1 Integrated circuitry projecting and controlling electrical appts. - has voltage limiter delivering pulse signal to counter if mains voltage is applied in-front of main switch
05/16/1991DE4010971C1 Combination electro-tool and suction appts. - has monitoring circuit connected to test circuit checking site of operating switch
04/1991
04/30/1991US5012381 Motor drive circuit with reverse-battery protection
04/25/1991DE3934504A1 Polarity reversal protection circuit for DC-fed equipment - ensures correct polarity of voltage supplied to load from reversible DC source via bistable relay circuit
04/25/1991DE3934503A1 Polarity reversal protection circuit for DC-fed equipment - ensures correct polarity of voltage supplied to load from reversible DC source via bistable relay circuit
04/03/1991EP0419991A2 Load driver with reduced dissipation under reverse-battery conditions
03/1991
03/28/1991DE3930896A1 Polarisation protective circuit for DC consumer - has inversely operated MOSFET between earth input and output
03/21/1991DE3934421C1 Protective circuit for circuitry with light indicator in motor vehicle - has transistor breaking current flow in dependence on information voltage from resistor measuring current
03/14/1991DE3930091A1 Polarity sensitive load reverse voltage protection circuit - has power MOSFET and bistable comparator for efficient monitoring and control of directional current flow to load
02/1991
02/20/1991CN2071836U Electric current controlled protective device for refrigerator
02/12/1991US4992683 Load driver with reduced dissipation under reverse-battery conditions
01/1991
01/29/1991US4989114 Bridge circuit having polarity inversion protection means entailing a reduced voltage drop
01/22/1991US4987513 Apparatus and method for selectively delaying the connection of an electrical supply voltage to an electrical load
12/1990
12/25/1990US4980622 Actuator two-fault tolerance apparatus
12/12/1990CN2067471U Multistage safety device for communication equipment
11/1990
11/28/1990EP0399020A1 Integrated semiconductor circuit with polarity reversal protection.
09/1990
09/26/1990EP0389452A2 Bridge circuit having polarity inversion protection means entailing a reduced voltage drop
09/18/1990US4958251 Guarded electronic circuit from reversal of its supply battery polarity
09/18/1990US4958055 Control circuit for a refrigerator combined with a microwave oven
09/04/1990CA1273700A1 Method for switching-error-protected actuation of the switching devices for carrying out the method
08/1990
08/23/1990WO1990009694A1 Improvements in or related to circuit breakers used with electrical apparatus
08/23/1990WO1990005918A3 Universal output circuit
07/1990
07/18/1990EP0377683A1 Circuit arrangement for the high-voltage supply of an electrostatic filter
07/12/1990WO1990007813A1 Process for monitoring short-circuits in a voltage circuit inverter
06/1990
06/20/1990CN1043231A Automatic control device for preventing closing switch with grounded wire
06/13/1990EP0372050A1 Electrical safety apparatus.
05/1990
05/31/1990WO1990006012A1 Integrated semiconductor circuit with polarity reversal protection
05/31/1990WO1990005918A2 Universal output circuit
05/30/1990EP0370828A2 Electric power installations, especially for office furniture
05/23/1990EP0369782A2 Drive circuit for operating an appliance such as a printer
05/18/1990CA2002815A1 Integrated semiconductor circuit with polarity reversal protection
05/01/1990CA1268548A1 Electronic board identification
04/1990
04/26/1990DE3835662A1 Device for actuating inductive loads in a motor vehicle
04/04/1990EP0360991A2 An integrated circuit self-protected against reversal of the supply battery polarity
03/1990
03/29/1990DE3929185A1 Polarity reversal protection system for battery - uses electronic component or integrated circuit providing reverse voltage protection for each individual battery cell
03/21/1990EP0358924A1 Control apparatus with a circuit arrangement for its protection when the earth connection is interrupted
03/14/1990EP0358590A1 Actuator two-fault tolerance apparatus
02/1990
02/22/1990DE3828000A1 Device for preventing the effects of moisture condensation in electrical equipment
02/13/1990US4901195 Self-proving vehicle grounding system
02/07/1990CN2052581U Potentiostat for all-automatic save energy refrigerator
02/06/1990US4898229 Thermostat with integral means for detecting out-of-phase connection of a two-transformer power source
01/1990
01/16/1990US4894745 Method and apparatus for protecting against semiconductor power control failure
01/10/1990EP0349836A2 A guarded electronic circuit from reversal of its supply battery polarity
12/1989
12/27/1989EP0348128A1 Shock-proof mains voltage supply outlet and method
12/26/1989US4890212 Electric apparatus having a start-up control function
12/19/1989US4888660 Shock-proof mains voltage supply outlet and method
12/13/1989CN2049422U Fully-automatic protective device for household electric appliance
12/06/1989CN2049030U Energy saving protector for refrigerator
11/1989
11/30/1989WO1989011747A1 Electrical safety apparatus
11/30/1989WO1989011338A1 Circuit arrangement for the high-voltage supply of an electrostatic filter
11/23/1989EP0342614A1 Safety power supply system for movable electric machines
11/01/1989CN2047075U Refrigerator-protector capable of recalling delay
10/1989
10/25/1989CN2046689U Protector of domastic electric appliances
10/18/1989EP0337337A2 Method for the switching failure protected actuation of circuit breakers of a switch gear installation
10/12/1989DE3809576A1 Switching device for providing polarity in telecommunications devices
10/11/1989CN2045908U Electricity-saving life-prolongation protector for refrigerator
10/04/1989CN2045551U 冰箱保护器 Refrigerator protector
10/04/1989CN2045547U Safety automation protector for domestic electric appliances
09/1989
09/27/1989CN2045157U Fully automatic comprehensive protective device for household appliances
09/27/1989CN2045154U Integrated-circuit protective device for air conditioner
09/13/1989CN2044389U Digit controlled protector for household appliance
08/1989
08/24/1989DE3804360A1 Oscillating-armature motor having voltage matching
08/23/1989EP0329513A1 Antitheft device with an IC card for a car radio
08/23/1989CN1035025A Intelligent monitor
08/17/1989DE3803582A1 Mains connection with overvoltage (surge) protection
08/15/1989US4857985 MOS IC reverse battery protection
08/02/1989CN2042249U Fully-automatic protector for domestic appliance
08/01/1989US4853821 Alternating current power sensing device for preventing start-up at power restoration
07/1989
07/26/1989CN2041864U Power-saving, protective device for household frigidarium
07/19/1989CN2041456U Protector for electric appliances
06/1989
06/27/1989US4843514 Electrical connection sentry system
06/15/1989DE3741394A1 Circuit arrangement for protecting against polarisation reversal damage for load circuits with an MOSFET as switching transistor
06/14/1989CN2039474U Fully automatic protector for refrigerator
06/13/1989US4839533 Remote safety switch
06/07/1989CN2039074U Multifunctional clock-control protector for refrigerator
05/1989
05/09/1989US4829457 Overload protection circuit for solid state switch
05/03/1989CN2037115U Highly reliable protector for household refrigerator
04/1989
04/25/1989US4825328 Three phase electrical load protection device
04/19/1989EP0191046B1 Circuit for continuously controlling the grounding resistance of electric apparatuses
04/19/1989CN2036320U Comprehensive protection electricity saving controller for household refrigerator
04/19/1989CN2036319U Automic protector for refrigerator with electric voltage display
04/05/1989CN1032270A Voltage protector of refrigerator
03/1989
03/29/1989EP0308478A1 Three-conductor booster cable assembly
03/22/1989CN2034749U Automatic protector for refrigerator
03/21/1989US4814641 Electric safety supply apparatus and connector device combination
03/08/1989EP0305936A2 Mos ic reverse battery protection
02/1989
02/08/1989CN2032370U Protection socket for refrigerator
01/1989
01/31/1989US4802053 Control circuitry including phase failure relay
01/25/1989CN2031583U Ic auto-protector for refrigerator
01/12/1989DE3819235A1 Circuit arrangement for monitoring the serviceability of resistive heating elements
01/12/1989DE3819234A1 Circuit arrangement for metrological monitoring of the serviceability of resistive heating elements
01/03/1989US4796152 Multi relay selection control circuit power limiter
12/1988
12/28/1988EP0297079A1 Control and monitoring system for electric power distribution systems
11/1988
11/30/1988CN88103295A Passive delay circuit
11/23/1988CN88200719U 电子保安器 Electronic security devices
10/1988
10/18/1988CA1243396A1 Discharge protecting circuit for a television receiver
09/1988
09/22/1988DE3707930A1 Output stage drive having a switched-mode regulator
08/1988
08/30/1988US4767941 Method for error-protected actuation of the switching devices of a switching station and an apparatus thereof
08/25/1988WO1988006364A1 Three-conductor booster cable assembly
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