| Patents for H01H 47 - Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current (7,312) |
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| 06/20/1989 | US4841162 Limiter switching apparatus |
| 06/14/1989 | EP0319669A2 Current regulator |
| 06/14/1989 | CN2039461U Multi-functional sensitive relay |
| 06/14/1989 | CN2039460U Noiseless power-economizer for ac electro-magnetic valve and electric contactor |
| 06/13/1989 | CA1255754A1 Fiber optic wiring device control system |
| 06/06/1989 | US4837455 Interrupt controlled switching device |
| 05/31/1989 | CN2038667U Multifunctional time-delay relay |
| 05/31/1989 | CN2038659U Noiseless button switch used for energy-saving starting-stop |
| 05/24/1989 | EP0317104A2 Control circuitry |
| 05/23/1989 | US4833565 Electromagnetic contactor with algorithm controlled closing system |
| 05/23/1989 | US4833435 Electromagnetic relay |
| 05/23/1989 | US4833284 Power relay switching control device for microwave oven |
| 05/17/1989 | CN2037870U Automatic power switch for radiophotograph machine |
| 05/10/1989 | EP0314683A1 Circuit protector |
| 05/03/1989 | CN2037107U Single phase power supply connecting device with delay connecting function |
| 05/03/1989 | CN2037106U 电子延时开关 Electronic time delay switch |
| 04/26/1989 | CN2036702U Electronic timed switch |
| 04/25/1989 | US4825333 Drive circuit |
| 04/25/1989 | CA1253235A1 Automatic light signalling system |
| 04/20/1989 | DE3733091A1 Method and arrangement for adjusting (setting) the load current through an inductive load, especially through a fuel injection valve |
| 04/19/1989 | CN2036315U Telecontrol electric power source plug board |
| 04/13/1989 | DE3838449A1 Clamping-in protection device |
| 04/13/1989 | DE3737791A1 Fail-safe switch device |
| 04/12/1989 | EP0311576A2 Active overvoltage control for inductive load driving |
| 04/12/1989 | CN1032409A Integrated time relay for frequency display |
| 04/05/1989 | EP0310383A1 Drive circuit device for inductive load |
| 04/05/1989 | EP0309755A1 Method and apparatus for controlling the current in an inductive load, particularly in a fuel injector |
| 04/05/1989 | CN2035531U 光耦合继电器 Optical coupling relay |
| 04/05/1989 | CN2035530U Dual switch for fan working intermittently or timely |
| 04/04/1989 | CA1252179A1 Fuel injection solenoid driver circuit |
| 03/29/1989 | CN2035139U High-efficiency energy-saving device for ac contactor |
| 03/22/1989 | CN2034746U Protector for refrigerator |
| 03/14/1989 | US4812945 Method and apparatus for providing autoranging for an AC/DC power management circuit for DC solenoid actuators |
| 03/09/1989 | DE3728253A1 Automatic staircase light which can be reset |
| 03/08/1989 | EP0306437A2 Chopper circuit for the control of coils of electromagnets or step motors, particularly for a matrix printer |
| 03/07/1989 | US4811153 Circuit protector |
| 03/01/1989 | CN2033543U Infrared-ray controller |
| 02/22/1989 | CN2033161U Multi-functional electricity-saving safe unit |
| 02/15/1989 | EP0303210A2 Protection device for an electromagnetic drive of a switch gear |
| 02/08/1989 | CN2032361U 数字式时间继电器 Digital time relay |
| 02/07/1989 | US4803589 Electromagnetic relay |
| 01/26/1989 | DE3723165A1 Reed contact and a method for varying the switching-on time definition of reed contacts |
| 01/24/1989 | US4800292 Temperature sensing circuit |
| 01/24/1989 | US4800290 Control circuitry |
| 01/19/1989 | DE3722527A1 Method and circuit arrangement for driving a fuel injection valve |
| 01/18/1989 | CN2031119U 逻辑继电器 Logic Relays |
| 01/11/1989 | EP0298737A1 Solenoid drive circuit |
| 01/11/1989 | EP0298718A2 Relay circuit having a pulse generator for closing contacts |
| 01/11/1989 | CN2030757U 电源控制开关 Power Control Switch |
| 01/10/1989 | US4797779 Pulsed power supply |
| 01/10/1989 | CA1248579A1 A.c. power control for d.c. solenoid actuators |
| 01/04/1989 | EP0297957A1 Command and control device for a contactor, and control process therefor |
| 01/04/1989 | CN2030388U Automatic protection device for refrigerator and other electric equipments |
| 01/04/1989 | CN2030376U Trigger type time-delay interval relay |
| 01/03/1989 | US4796152 Multi relay selection control circuit power limiter |
| 01/03/1989 | CA1248205A1 Vending machine power switching apparatus |
| 12/28/1988 | EP0152404B1 Voltage adaptive solenoid control apparatus |
| 12/28/1988 | CA1247729A Multipole breaking device with remote control |
| 12/21/1988 | CN88211238U Multifunction protection unit for household electric appliances |
| 12/21/1988 | CN88210948U Automatic power saving protection unit |
| 12/21/1988 | CN87203917U Automatic controller for quiet run ac contactor |
| 12/14/1988 | EP0294794A2 Process to open soldered contacts of a relay and circuit to execute the same |
| 12/14/1988 | CN88202850U Controllable electromagnetic driving apparatus |
| 12/07/1988 | CN87205879U Electric torch remote-control switch device of household appliances |
| 12/07/1988 | CN87202753U Double delay time relay |
| 11/30/1988 | CN88202383U Floating switch |
| 11/22/1988 | CA1245264A1 Diagnostic testing arrangement for commutated relay switching circuits |
| 11/09/1988 | EP0290314A1 Operating circuit for electric remote-control apparatuses, especially remotely controlled brakers, and apparatuses incorporating this circuit |
| 11/09/1988 | CN88211180U Protective device for full automatic refrigerator and air conditioner |
| 10/26/1988 | EP0287975A2 Circuit arrangement with an electromagnetically controlled fault current switch device |
| 10/13/1988 | DE3710520A1 Remote-controlled mechanism for protective (safety) switches (automatic circuit breakers) |
| 10/11/1988 | US4777556 Solenoid activation circuitry using high voltage |
| 10/06/1988 | DE3710079A1 Electric interlocking switch |
| 10/06/1988 | DE3709771A1 Circuit arrangement for voltage monitoring |
| 10/05/1988 | CN87209171U Dynamic delayer |
| 10/04/1988 | US4775801 Electronic timer |
| 09/28/1988 | CN87215744U Electric switch clock |
| 09/28/1988 | CN87201925U Integrated circuit braking time relay |
| 09/27/1988 | US4774623 Bistable relay circuit |
| 09/22/1988 | DE3707930A1 Output stage drive having a switched-mode regulator |
| 09/20/1988 | US4772809 For supplying electric power to a load |
| 09/20/1988 | US4772808 Control device for electrical appliances |
| 09/14/1988 | CN87214158U Electricity saving sound elimination botton switch |
| 09/13/1988 | US4771186 Condition responsive switch |
| 09/13/1988 | US4770178 Method and circuit arrangement for controlling an injection valve |
| 09/07/1988 | CN87215833U Automatic switch of a.c. voltage regulator |
| 09/07/1988 | CN87101593A Switch subjected to multi-controlling |
| 09/06/1988 | US4769737 Circuit for driving a relay used in an AC circuit, with a protection against contact welding |
| 09/01/1988 | DE3718123C1 Relay |
| 08/25/1988 | DE3704470A1 Reed contact arrangement |
| 08/24/1988 | EP0279597A2 Electromagnetic contactor with reduced noise magnetic armature |
| 08/24/1988 | EP0279595A2 Electromagnetic contactor with current regulated electromagnetic coil for holding the contacts closed |
| 08/24/1988 | EP0279594A2 Electromagnetic contactor with algorithm controlled closing system |
| 08/24/1988 | EP0279593A2 Electromagnetic contactor with control circuit for providing acceleration, coast and grab functions |
| 08/24/1988 | EP0279592A2 Electromagnetic contactor with energy balanced closing system |
| 08/24/1988 | CN87211302U Supersonic remote-controller |
| 08/24/1988 | CN87100568A Power on/off protector for household electric appliances |
| 08/23/1988 | US4766331 For regulating the supply of electricity from a source to a load |
| 08/18/1988 | DE3703859A1 Electrical position switching arrangement acting without contact |
| 08/17/1988 | CN87212026U Timing switch used for corridor lighting lamp |