| 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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| 05/23/1990 | CA2003355A1 Method and apparatus for driving and controlling an improved solenoid impact printer |
| 05/15/1990 | US4926281 Fail-safe and fault-tolerant alternating current output circuit |
| 05/03/1990 | WO1990004715A1 Driver circuit for solenoid operated fuel injectors |
| 05/03/1990 | DE3836467A1 Contactless switching device |
| 05/02/1990 | CN2056789U Power saving device for ac contactor |
| 05/01/1990 | US4922370 Automatically resetting circuit protector |
| 05/01/1990 | US4922369 Circuit protector |
| 04/26/1990 | DE3925767A1 Control procedure for electromechanical relay - using circuit to reduce coil current and maintain switched state after response |
| 04/18/1990 | CN2056286U Multifunctional full automatic protector for refrigerator |
| 04/18/1990 | CN2056277U Mechanical locker ac contactor |
| 04/17/1990 | US4918564 Load driver with delayed turn-off |
| 04/11/1990 | CN2055994U Multiloop refrigerator protection device with adjustable protection point |
| 04/05/1990 | WO1990003655A1 A switching circuit |
| 04/04/1990 | EP0362085A1 Current interrupting device with remote control |
| 04/04/1990 | EP0361353A1 Direct current-energised control circuit for a solenoid valve |
| 04/03/1990 | US4914315 Method for loosening the contacts of a sticking relay as well as circuit arrangement for carrying out the method |
| 03/28/1990 | CN2055289U Pin-lift alternating-current contactor |
| 03/22/1990 | DE3830742A1 Safety circuit |
| 03/21/1990 | CN2054940U Non-contact a c electromagnetic device soundless operating apparatus |
| 03/14/1990 | EP0358149A2 Load drive circuits |
| 03/14/1990 | CN2054582U Automatic voltage regulating unit for refrigerator |
| 03/14/1990 | CN2054563U Alternating current equipment switch electricity-saving life-prolonging unit |
| 03/07/1990 | CN2054205U Electromagnetic type electrical controller with under-voltage protection |
| 03/06/1990 | US4907122 Relay circuit having a pulse generator for closing contacts |
| 02/28/1990 | EP0356260A2 Control circuit |
| 02/28/1990 | CN2053808U Computerized monitor for refrigerator |
| 02/28/1990 | CN2053806U Safety protection device for electric refrigerator |
| 02/28/1990 | CN2053791U Timed power supply |
| 02/27/1990 | US4905120 Driver circuit for solenoid operated fuel injectors |
| 02/14/1990 | CN2052975U Power saving electric magnet starter |
| 02/14/1990 | CN2052948U Ac/dc common used consumption-free holding contactor |
| 02/14/1990 | CN2052947U Anti-shaking timedelay cut-off relay |
| 02/14/1990 | CN2052946U Power saving protector |
| 02/14/1990 | CN1039678A Circuit breaker auxiliary switch assembly |
| 02/07/1990 | EP0353986A2 Relay control method and apparatus for a domestic appliance |
| 02/07/1990 | CN2052548U Time control with two-timing |
| 01/31/1990 | EP0352391A1 Control device for switching an electrical power circuit on and off |
| 01/30/1990 | US4897755 Apparatus and method for relay control |
| 01/25/1990 | DE3824545A1 Circuit arrangement for driving the DC-supplied coil of a contactor |
| 01/24/1990 | EP0351451A2 Control circuitry for a pulsating current |
| 01/24/1990 | CN2051782U Air electromagnetic type electricity saving, silent ac contactor |
| 01/03/1990 | EP0349273A2 Apparatus and method for relay control |
| 01/02/1990 | US4890906 Rotary optical switch having make-before-break feature |
| 12/28/1989 | DE3821622A1 Contactor safety circuit |
| 12/27/1989 | CN1038374A Noise-revnoving emergy-saving apparatus of alternating current contactor or relay |
| 12/26/1989 | US4890188 Solenoid driver system |
| 12/26/1989 | US4890001 Electrical circuit for selectively activating electrical devices |
| 12/21/1989 | DE3820672A1 Control circuit for regulating the coil current of electromagnets |
| 12/20/1989 | CN2049821U Power saving ac contactor |
| 12/20/1989 | CN1038179A Control system and device for contactor appratus |
| 12/20/1989 | CN1038178A Control and testing system for installation using contactors |
| 12/13/1989 | CN2049424U Multifunction safety device capable of presetting parameters |
| 12/13/1989 | CN2049423U Combined protective device of color tv set and refrigerator |
| 12/13/1989 | CN1037993A Module of protection for electromagnet of contactor |
| 12/12/1989 | EP0248849A4 Adaptive switching circuit. |
| 12/06/1989 | EP0344492A2 Ventilating device for the simultaneous aeration and dearation of spaces |
| 12/06/1989 | EP0344457A2 Operating device for an electrical relay in a power line switch |
| 12/05/1989 | CA1263725A1 Solenoid driven metering pump supply voltage compensation circuit |
| 11/30/1989 | DE3817770A1 Device for the timed operation of an electromagnetic valve |
| 11/29/1989 | EP0343161A1 Solenoid driver control circuit with initial boost voltage. |
| 11/28/1989 | US4884160 Constant current actuator for inductive load |
| 11/22/1989 | CN2048245U Protector for fuse open-phase |
| 11/21/1989 | US4882532 Active overvoltage control for inductive load driving |
| 11/21/1989 | CA1263144A1 Relay trouble detecting device |
| 11/16/1989 | DE3815358A1 Safety emergency-off switching for contactor feeders with an upstream power circuit breaker |
| 11/01/1989 | CN2047063U Multifunction dynamic relay |
| 10/31/1989 | US4878147 Electromagnetic coil drive device |
| 10/19/1989 | DE3811994A1 Electrical sensor circuit |
| 10/18/1989 | CN2046272U Powerless type circuit state transducer |
| 10/18/1989 | CN1005509B Control arrangements for electromagnetic suitches |
| 10/17/1989 | US4874962 Low power, leakage current switching circuit |
| 10/10/1989 | US4873607 Method of and apparatus for controlling the opertion of electromagnetic switches |
| 10/10/1989 | US4873454 Power source switching circuit |
| 09/20/1989 | EP0333230A2 Limit switch having means to evaluate its actuating stroke |
| 09/05/1989 | US4862866 Circuit for the piloting of inductive loads, particularly for operating the electro-injectors of a diesel-cycle internal combustion engine |
| 08/31/1989 | DE3805031A1 Schaltungsanordnung zur getakteten versorgung Circuit arrangement for the clocked supply |
| 08/24/1989 | WO1989007831A1 Circuit arrangement for cyclic supply |
| 08/23/1989 | EP0329588A1 Gas valve shut off method and apparatus |
| 08/23/1989 | EP0328743A2 Circuit arrangement for selectively switching on several electrical appliances, especially car radios for demonstration |
| 08/23/1989 | CN2043422U Bilaterial controlled silicon time relay |
| 08/23/1989 | CN2043421U Automatic time-delay switch device |
| 08/23/1989 | CN1035020A Intergral soundless power economizer |
| 08/22/1989 | US4860157 Molded case circuit breaker actuator-accessory module |
| 08/16/1989 | CN2043012U Light-controlled power socket |
| 08/15/1989 | US4858056 Molded case circuit breaker actuator-accessory module |
| 08/15/1989 | US4857757 Drive circuit for a two layer laminated electrostriction element |
| 08/15/1989 | US4856482 Method of controlling the demagnetization phase of electromagnetic devices, especially of electromagnetic valves of combustion engines |
| 08/08/1989 | US4855662 Charging circuitry having polarity detecting protection |
| 08/08/1989 | US4855612 Switching current and a relay device employed therein |
| 07/26/1989 | CN2041855U Automatic time delay switch of stair light |
| 07/25/1989 | US4852046 Control system improvements in or relating to burner |
| 07/25/1989 | US4850852 Gas valve shut off method and apparatus |
| 07/11/1989 | US4847728 Detecting a defective suppressor diode in a coil driving circuit |
| 07/06/1989 | DE3744162A1 Time switch |
| 07/06/1989 | DE3743751A1 Electromagnetically operable contactor having a DC drive |
| 07/05/1989 | CN2040671U Ac contactor sound deadening electricity saving coil |
| 07/04/1989 | US4845420 Drive circuit device for inductive load |
| 07/04/1989 | CA1256964A1 Radio wave signal controlled door lock arrangement |
| 06/26/1989 | EP0216816A4 Circuit for dissipating stored inductive energy. |
| 06/20/1989 | US4841164 Light-sensitive switch structure and method with inverse off/on ratio |