| 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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| 12/12/1991 | WO1991019312A1 Filter capacitor precharge apparatus |
| 12/11/1991 | EP0460130A1 Dual current sensing driver circuit |
| 12/10/1991 | US5072328 Power control relay for electrical outlets which maintains position in absence of solenoid energization |
| 12/10/1991 | US5071370 Connector system for use with electrically operable pumps |
| 12/10/1991 | US5070934 Ventilation device with heat recovery |
| 12/04/1991 | EP0459919A1 Electrical system comprising an electromechanical relay and a rectifying step-down circuit |
| 12/04/1991 | CN1056768A Magnetic maintaining control relay |
| 12/03/1991 | CA1292761C Electromagnetic contactor with energy balanced closing system |
| 11/28/1991 | DE4116713A1 Monitoring speed of switch main contact - by measuring attenuation speed of auxiliary switch contacts from which switching speed is derived |
| 11/27/1991 | EP0458302A2 Remotely controlled relay |
| 11/27/1991 | EP0458301A2 Remotely-controlled relay |
| 11/27/1991 | EP0458294A2 Remotely-controlled relay |
| 11/26/1991 | CA1292493C Electromagnetic contactor with reduced noise magnetic armature |
| 11/26/1991 | CA1292492C Electromagnetic contactor with algorithm controlled closing system |
| 11/26/1991 | CA1292491C Electromagnetic contactor with control circuit for providing acceleration, coast and grab functions |
| 11/20/1991 | CN2089206U Electromagnetic electricity saver |
| 11/13/1991 | CN1056182A Highly efficient power saving electromagnetic mechanism |
| 11/06/1991 | CN2088303U Soundless, power-saving phase-detecting leakage protector |
| 11/06/1991 | CN2088287U Power-economizing and copper-saving silencing electric contactor |
| 11/06/1991 | CN2088286U Energy-saving dual-purpose electric contactor |
| 10/31/1991 | DE4027282C1 Electronic control circuit for residual magnetisation relay - uses high-low stage to limit release voltage of coil to 1/10 to charging voltage |
| 10/30/1991 | CN2087813U Pulse contactor |
| 10/23/1991 | EP0452358A1 Method and apparatus for driving and controlling an improved solenoid impact imprinter. |
| 10/17/1991 | WO1991015865A1 Hinged-armature relay, especially for motor vehicles |
| 10/15/1991 | CA1290792C Electromagnetic contactor with current regulated electromagnetic coil for holding the contacts closed |
| 10/10/1991 | DE4011217A1 Controlling magnetic-valve in antilocking braking system - ascertaining function of valve by tapping voltage of transistor setting current flow through solenoid |
| 10/10/1991 | DE4011049A1 Bistable relay with built-in contact-state interlock - uses transient coil current for changeover diagnostics |
| 10/08/1991 | US5055962 Relay actuation circuitry |
| 10/08/1991 | US5055961 Flyback current dampening apparatus |
| 10/02/1991 | EP0449632A2 Matrix switcher apparatus |
| 10/02/1991 | EP0449543A1 Digital pulse-width-modulation generator for current control |
| 10/01/1991 | US5053911 Solenoid closure detection |
| 09/25/1991 | CN2085561U Autorotation soundless electricity-saving coil |
| 09/24/1991 | US5051604 Electrically normally closed switch device |
| 09/12/1991 | DE4006838A1 Electronic switching system for electromechanical relay - uses series electronic switch for interrupting DC voltage to provide periodic DC pulses |
| 09/11/1991 | CN2084655U Electricity saving ac contactor |
| 08/28/1991 | EP0443034A1 System for detecting melt-adhesion of relay |
| 08/22/1991 | DE4003179A1 Increasing operating voltage range for EM switching appts. - providing max. voltage at least 3 times greater than min. operating voltage |
| 08/13/1991 | US5040089 D.C. relay with power reducing function |
| 08/07/1991 | EP0440498A2 Electrical contactor with controlled closure characteristic |
| 08/06/1991 | US5038247 Method and apparatus for inductive load control with current simulation |
| 08/02/1991 | CA2034966A1 Electrical contactor with controlled closure characteristic |
| 07/31/1991 | CA2033851A1 Variable speed motor drive |
| 07/30/1991 | US5036422 Solenoid pump driving circuit |
| 07/24/1991 | EP0437447A1 A switching circuit. |
| 07/17/1991 | EP0437003A2 Actuator with a built-in reed switch |
| 07/11/1991 | WO1991010250A1 Safety circuit |
| 07/10/1991 | CN2080705U Relay with extremely low trigger power |
| 07/03/1991 | EP0435686A2 Contact sensor module |
| 07/03/1991 | CN2080230U Low power consumption electronic remembering contactor |
| 07/03/1991 | CN2080228U Interface device of contactor switch |
| 07/02/1991 | US5028854 Variable speed motor drive |
| 07/02/1991 | CA1285645C Relay circuit having a pulse generator for closing contacts |
| 06/27/1991 | WO1991010251A1 Dual current sensing driver circuit |
| 06/27/1991 | CA2042389A1 Dual current sensing driver circuit |
| 06/26/1991 | EP0433592A1 Computer controlled electric timer |
| 06/20/1991 | DE3941821A1 Control circuit for monostable relay - has capacitor power supply and current pulse regulating unit |
| 06/20/1991 | DE3941811A1 Miniature electromagnetic relay - has parasitic air gaps between armature and yoke reduced by surface treatment |
| 06/19/1991 | CN2079352U Electromagnetic high-efficient energy-saving controller |
| 06/19/1991 | CN1052398A Electrical energy storage system |
| 06/05/1991 | CN2078490U Starting-noise-free energy-saving contactor |
| 06/04/1991 | US5021917 Control panel power enabling and disabling system for aerial work platforms |
| 05/29/1991 | EP0429159A2 Relay with ARC sensor |
| 05/29/1991 | EP0429158A2 Relay with control ciruit to minimize arcing |
| 05/21/1991 | US5018043 Removable modular control device for a contactor apparatus |
| 05/16/1991 | WO1991006968A1 Flyback current dampening apparatus |
| 05/16/1991 | DE4010971C1 Combination electro-tool and suction appts. - has monitoring circuit connected to test circuit checking site of operating switch |
| 05/16/1991 | DE3937122A1 Fail=safe switching circuitry using relays - having closing contacts coupled in series in release current circuit |
| 05/14/1991 | US5016134 Driver circuit for single coil magnetic latching relay |
| 05/14/1991 | US5015996 Switch device with a trouble detecting and indicating function |
| 05/08/1991 | CN2076708U High-performance noiseless electricity saver |
| 05/08/1991 | CN1051266A Coil for silencing and energy-saving |
| 05/07/1991 | US5014157 Apparatus for controlling and testing an electric installation |
| 05/07/1991 | CA1283947C D.c. power control for d.c. solenoid actuators |
| 05/02/1991 | EP0425169A2 Electrical energy storage system |
| 05/01/1991 | CN2076271U Electricity-saving silencing arrangement for a. c contactor |
| 04/28/1991 | CA2028388A1 Electrical energy storage system |
| 04/25/1991 | DE3934144A1 Operation control circuit for low voltage DC relay - has voltage from mains divided down by bias capacitor in series with rectifier |
| 04/24/1991 | EP0424283A1 Control device for a remote control interrupter |
| 04/24/1991 | EP0424280A1 Electronic control circuit for a direct current energised pulse motor |
| 04/24/1991 | EP0423638A2 Safety circuit for motor-driven and electrical brake- or arrestable oscillating weights or machine parts |
| 04/24/1991 | CN2075614U Intermittent switch for rain scraper |
| 04/17/1991 | CN2075383U Self-lock type contactor |
| 04/16/1991 | US5008516 Relay control method and apparatus for a domestic appliance |
| 04/16/1991 | CA1283198C Power supply associated with ac line relay switch |
| 04/11/1991 | DE3933699A1 Safety combination system e.g. for elevator - has arrangement of three auxiliary relays bridged by switch |
| 04/10/1991 | CN1050643A Control device for load current self-maintaining ac contactor |
| 04/03/1991 | EP0420202A2 Timer circuit |
| 04/03/1991 | CN2074498U Power-economizer for ac contactor |
| 03/28/1991 | DE3931405A1 Control circuitry for relay - has transistor switch controlled by pulses of appropriate length |
| 03/27/1991 | EP0418665A1 Device for the detection and discrimination of functional faults in an electrical power supply circuit |
| 03/27/1991 | CN2074051U High-effiencicy energy-saving coil bag for a.c. contactor |
| 03/20/1991 | EP0417800A2 Electronic safety circuit for a househould appliance driven by an electric motor |
| 03/20/1991 | EP0314683A4 Circuit protector |
| 03/20/1991 | CN2073617U Economizer of ac. contactor |
| 03/13/1991 | CN1049934A Delay cut-off relay for preventing switch from fluttering |
| 03/12/1991 | CA1281370C Wall box dimmer switch with plural remote control switches |
| 03/06/1991 | EP0415485A2 Installation to generate current pulses of an established form in an inductive user |
| 03/06/1991 | CN2072724U Magnetic spinning damping electricity-saving coil |
| 03/05/1991 | US4998177 Electromagnetic solenoid drive apparatus in a vehicle |