Patents for H01H 51 - Electromagnetic relays (5,199) |
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02/21/1989 | CA1250335A1 Polarized electromagnetic relay |
02/15/1989 | EP0303054A2 Electromagnetic drive and polarized relay |
02/14/1989 | US4804933 Automatic transfer switch |
02/08/1989 | CN1031000A High sensitive electromagnetic trip device and their method for production |
02/07/1989 | US4803587 Arrangement for change-over contact apparatus protection with interlocking member and module |
02/01/1989 | EP0301935A1 Highly sensitive electromagnetic tripping device and production thereof |
02/01/1989 | CN1003199B Polarized electromagnetic actuator device |
01/31/1989 | US4801909 Electromagnetic device for controlling current to a starter motor |
01/25/1989 | EP0300697A2 Electric switches |
01/25/1989 | CN2031573U Magnetic arc dc contactor |
01/17/1989 | CA1249000A1 Electromagnetic relay |
01/10/1989 | CA1248570A1 Remotely controllable relay |
01/03/1989 | US4795994 Electromechanical DC-RF relay |
01/03/1989 | US4795929 Rotary actuator |
12/29/1988 | WO1988010505A1 Improvements in and relating to electrical components |
12/21/1988 | CN88200935U Power-off self-protection contactor |
12/21/1988 | CN87215142U Inclined polar locking type alternating current contactor with noiseless and saving electricity |
12/21/1988 | CN87203917U Automatic controller for quiet run ac contactor |
12/20/1988 | US4792776 Miniaturized electromagnetic relay for switching high voltages |
12/20/1988 | CA1247171A1 Remotely controlled solenoid operated circuit breaker |
12/14/1988 | EP0295236A2 Hand operated on-off switch with electromagnetic release |
12/14/1988 | EP0294481A1 Use of an electromagnetic actuator |
12/14/1988 | CN88202850U Controllable electromagnetic driving apparatus |
12/13/1988 | US4791255 Used to alternately deliver electrical power to a load |
12/07/1988 | CN87101042A Electric double-ratchet wheel multi-function switch |
11/30/1988 | EP0293199A2 Electromagnetic relay |
11/30/1988 | CN87204164U Permanent-magnet driving step relay |
11/29/1988 | US4788516 Enclosed electromagnetic relay |
11/24/1988 | DE3813113A1 Monostable electromagnetic relay |
11/23/1988 | EP0292423A1 Electromagnetic relay |
11/17/1988 | EP0291019A1 Electro-magnetic relay |
11/17/1988 | EP0290734A2 Magnet switch for a starter |
11/16/1988 | CN86210034U Power-consumption-free dual-control contactor |
11/15/1988 | CA1244860A1 Polarized electromagnetic relay with magnetic latching for an electric circuit breaker trip release |
11/09/1988 | CN88210965U Direct heating ferrite pulse time relay |
11/01/1988 | US4782315 Bistable polarized electromagnet |
10/27/1988 | DE3711410A1 Mechanical switching (change-over) relay |
10/26/1988 | CN87215814U Model. cj 12-1 noise-eliminating and energy-saving device |
09/27/1988 | US4774485 Polarized magnetic drive for electromagnetic switching device |
09/20/1988 | US4772865 Flat-type polarized relay |
09/20/1988 | CA1242240A1 Biased electromagnet having a symmetrical configuration |
09/14/1988 | EP0282099A2 Electromagnetic relay |
09/08/1988 | DE3705918A1 Relay |
09/07/1988 | EP0280680A1 Electromagnetic switch, in particular for starting devices of internal combustion engines. |
09/06/1988 | US4769295 Battery and switch to be mounted on vehicles |
08/30/1988 | CA1241362A1 Polarized electromagnetic relay |
08/24/1988 | EP0279593A2 Electromagnetic contactor with control circuit for providing acceleration, coast and grab functions |
08/10/1988 | EP0277833A2 Polarized electromagnetic relay |
08/10/1988 | CN87215662U 自保持节能接触器 Since keep saving contacts |
08/10/1988 | CN87210878U Multiple switch |
08/10/1988 | CN87208809U Energy-saving ac contactor |
08/03/1988 | EP0276440A1 Electric apparatus |
08/03/1988 | CN87215590U Ac magnetic hold contactor |
08/02/1988 | CA1239962A1 Electromagnetic drive and polarized relay |
07/27/1988 | CN86209944U Ac contactor |
07/26/1988 | CA1239691A1 Variable configuration switching device obtained by assembling modular elements |
07/14/1988 | WO1988005207A1 Electromagnetic actuator |
07/12/1988 | US4757293 For converting electrical energy into mechanical energy by high vibrations |
07/12/1988 | CA1239178A1 Polarized electromagnet relay |
07/06/1988 | CN87210144U Whole-off electronic type electrical appiliance switch with multiple earth control |
07/05/1988 | US4755782 Magnetically operated actuator having plural permanent magnet means |
07/05/1988 | US4755781 Electrical switch for starters |
06/29/1988 | EP0272409A1 Polarized flat-type relay |
06/28/1988 | US4754162 Timer controlled multipole circuit breaker |
06/22/1988 | EP0272164A2 Bistable-polarised electromagnet |
06/22/1988 | CN87209991U Master switch for electromagnetic source of motor vehicles |
06/21/1988 | US4752757 Electromagnetic actuator |
06/21/1988 | US4752754 Method of producing a reed relay for switching r.f. currents, and reed relay produced in accordance therewith |
06/15/1988 | EP0271366A1 Remote control interrupter with an auxiliary change-over switch in its control circuit |
06/07/1988 | US4749167 Two position mechanism |
06/01/1988 | EP0268804A1 Electrical switch disposition |
05/24/1988 | US4747010 Bi-stable electromagnetic device |
05/24/1988 | US4746886 Electromagnetic actuator |
05/24/1988 | US4746885 Electromagnetic apparatus combined a pair of contactors into one unit |
05/18/1988 | EP0267430A1 Electromagnetic relay |
05/11/1988 | CN86208930U Ac conductor operating device with silence and pressureless plant |
04/27/1988 | EP0264619A2 Polarized magnetic drive for electromagnetic switching device |
04/26/1988 | US4740771 Armature biasing means in an electromagnetic relay |
04/20/1988 | CN87207079U Multifunctional switch with power-driven double-ratchet |
04/20/1988 | CN87202800U Ac/dc noise-free energy-saving contactor |
04/19/1988 | US4739292 Miniature relay |
04/13/1988 | EP0263581A2 Magnetically operated actuator |
04/13/1988 | CN87201719U Thrift electric instrument for alternating current contactor of cut-off voltage |
04/12/1988 | US4737750 Bistable electrical contactor arrangement |
04/07/1988 | WO1988002543A1 Electromagnetic switch, in particular for cranking devices of internal combustion engines |
04/06/1988 | EP0262297A2 Switching device |
04/06/1988 | CN87214284U Subminiature sensitive relay |
04/05/1988 | CA1234853A1 Molded case circuit breaker with single solenoid operator for rectilinear handle movement |
04/05/1988 | CA1234851A1 Monostable type relay |
04/05/1988 | CA1234850A1 Electrical control apparatus with electromagnetic latch |
03/29/1988 | US4734669 Electromagnetic contactor |
03/29/1988 | US4734668 Electromagnetic relay |
03/24/1988 | WO1988002179A1 Direction inversion circuit for dc drives |
03/08/1988 | US4730176 Electromagnet having a pivoted polarized armature |
03/08/1988 | US4730175 Polarized electromagnet device |
03/03/1988 | DE3628669A1 Electrical push-button switch |
03/02/1988 | EP0257607A2 Electromagnetic relay |
03/01/1988 | US4728917 Electromagnetic relay wherein response voltage is rendered temperature independent |
02/24/1988 | CN87200841U Shell type circuit switch |
02/23/1988 | US4727561 Measuring apparatus and method employing hard X-rays |