Patents for H01H 51 - Electromagnetic relays (5,199)
02/1989
02/21/1989CA1250335A1 Polarized electromagnetic relay
02/15/1989EP0303054A2 Electromagnetic drive and polarized relay
02/14/1989US4804933 Automatic transfer switch
02/08/1989CN1031000A High sensitive electromagnetic trip device and their method for production
02/07/1989US4803587 Arrangement for change-over contact apparatus protection with interlocking member and module
02/01/1989EP0301935A1 Highly sensitive electromagnetic tripping device and production thereof
02/01/1989CN1003199B Polarized electromagnetic actuator device
01/1989
01/31/1989US4801909 Electromagnetic device for controlling current to a starter motor
01/25/1989EP0300697A2 Electric switches
01/25/1989CN2031573U Magnetic arc dc contactor
01/17/1989CA1249000A1 Electromagnetic relay
01/10/1989CA1248570A1 Remotely controllable relay
01/03/1989US4795994 Electromechanical DC-RF relay
01/03/1989US4795929 Rotary actuator
12/1988
12/29/1988WO1988010505A1 Improvements in and relating to electrical components
12/21/1988CN88200935U Power-off self-protection contactor
12/21/1988CN87215142U Inclined polar locking type alternating current contactor with noiseless and saving electricity
12/21/1988CN87203917U Automatic controller for quiet run ac contactor
12/20/1988US4792776 Miniaturized electromagnetic relay for switching high voltages
12/20/1988CA1247171A1 Remotely controlled solenoid operated circuit breaker
12/14/1988EP0295236A2 Hand operated on-off switch with electromagnetic release
12/14/1988EP0294481A1 Use of an electromagnetic actuator
12/14/1988CN88202850U Controllable electromagnetic driving apparatus
12/13/1988US4791255 Used to alternately deliver electrical power to a load
12/07/1988CN87101042A Electric double-ratchet wheel multi-function switch
11/1988
11/30/1988EP0293199A2 Electromagnetic relay
11/30/1988CN87204164U Permanent-magnet driving step relay
11/29/1988US4788516 Enclosed electromagnetic relay
11/24/1988DE3813113A1 Monostable electromagnetic relay
11/23/1988EP0292423A1 Electromagnetic relay
11/17/1988EP0291019A1 Electro-magnetic relay
11/17/1988EP0290734A2 Magnet switch for a starter
11/16/1988CN86210034U Power-consumption-free dual-control contactor
11/15/1988CA1244860A1 Polarized electromagnetic relay with magnetic latching for an electric circuit breaker trip release
11/09/1988CN88210965U Direct heating ferrite pulse time relay
11/01/1988US4782315 Bistable polarized electromagnet
10/1988
10/27/1988DE3711410A1 Mechanical switching (change-over) relay
10/26/1988CN87215814U Model. cj 12-1 noise-eliminating and energy-saving device
09/1988
09/27/1988US4774485 Polarized magnetic drive for electromagnetic switching device
09/20/1988US4772865 Flat-type polarized relay
09/20/1988CA1242240A1 Biased electromagnet having a symmetrical configuration
09/14/1988EP0282099A2 Electromagnetic relay
09/08/1988DE3705918A1 Relay
09/07/1988EP0280680A1 Electromagnetic switch, in particular for starting devices of internal combustion engines.
09/06/1988US4769295 Battery and switch to be mounted on vehicles
08/1988
08/30/1988CA1241362A1 Polarized electromagnetic relay
08/24/1988EP0279593A2 Electromagnetic contactor with control circuit for providing acceleration, coast and grab functions
08/10/1988EP0277833A2 Polarized electromagnetic relay
08/10/1988CN87215662U 自保持节能接触器 Since keep saving contacts
08/10/1988CN87210878U Multiple switch
08/10/1988CN87208809U Energy-saving ac contactor
08/03/1988EP0276440A1 Electric apparatus
08/03/1988CN87215590U Ac magnetic hold contactor
08/02/1988CA1239962A1 Electromagnetic drive and polarized relay
07/1988
07/27/1988CN86209944U Ac contactor
07/26/1988CA1239691A1 Variable configuration switching device obtained by assembling modular elements
07/14/1988WO1988005207A1 Electromagnetic actuator
07/12/1988US4757293 For converting electrical energy into mechanical energy by high vibrations
07/12/1988CA1239178A1 Polarized electromagnet relay
07/06/1988CN87210144U Whole-off electronic type electrical appiliance switch with multiple earth control
07/05/1988US4755782 Magnetically operated actuator having plural permanent magnet means
07/05/1988US4755781 Electrical switch for starters
06/1988
06/29/1988EP0272409A1 Polarized flat-type relay
06/28/1988US4754162 Timer controlled multipole circuit breaker
06/22/1988EP0272164A2 Bistable-polarised electromagnet
06/22/1988CN87209991U Master switch for electromagnetic source of motor vehicles
06/21/1988US4752757 Electromagnetic actuator
06/21/1988US4752754 Method of producing a reed relay for switching r.f. currents, and reed relay produced in accordance therewith
06/15/1988EP0271366A1 Remote control interrupter with an auxiliary change-over switch in its control circuit
06/07/1988US4749167 Two position mechanism
06/01/1988EP0268804A1 Electrical switch disposition
05/1988
05/24/1988US4747010 Bi-stable electromagnetic device
05/24/1988US4746886 Electromagnetic actuator
05/24/1988US4746885 Electromagnetic apparatus combined a pair of contactors into one unit
05/18/1988EP0267430A1 Electromagnetic relay
05/11/1988CN86208930U Ac conductor operating device with silence and pressureless plant
04/1988
04/27/1988EP0264619A2 Polarized magnetic drive for electromagnetic switching device
04/26/1988US4740771 Armature biasing means in an electromagnetic relay
04/20/1988CN87207079U Multifunctional switch with power-driven double-ratchet
04/20/1988CN87202800U Ac/dc noise-free energy-saving contactor
04/19/1988US4739292 Miniature relay
04/13/1988EP0263581A2 Magnetically operated actuator
04/13/1988CN87201719U Thrift electric instrument for alternating current contactor of cut-off voltage
04/12/1988US4737750 Bistable electrical contactor arrangement
04/07/1988WO1988002543A1 Electromagnetic switch, in particular for cranking devices of internal combustion engines
04/06/1988EP0262297A2 Switching device
04/06/1988CN87214284U Subminiature sensitive relay
04/05/1988CA1234853A1 Molded case circuit breaker with single solenoid operator for rectilinear handle movement
04/05/1988CA1234851A1 Monostable type relay
04/05/1988CA1234850A1 Electrical control apparatus with electromagnetic latch
03/1988
03/29/1988US4734669 Electromagnetic contactor
03/29/1988US4734668 Electromagnetic relay
03/24/1988WO1988002179A1 Direction inversion circuit for dc drives
03/08/1988US4730176 Electromagnet having a pivoted polarized armature
03/08/1988US4730175 Polarized electromagnet device
03/03/1988DE3628669A1 Electrical push-button switch
03/02/1988EP0257607A2 Electromagnetic relay
03/01/1988US4728917 Electromagnetic relay wherein response voltage is rendered temperature independent
02/1988
02/24/1988CN87200841U Shell type circuit switch
02/23/1988US4727561 Measuring apparatus and method employing hard X-rays
1 ... 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52