Patents
Sitemap › H01 - Basic electric elements › H01H - Electric switches; Relays; Selectors; Emergency protective devices › H01H 51 - Electromagnetic relays
Patents for H01H 51 - Electromagnetic relays (5,199)
01/1990
01/24/1990CN2051782U Air electromagnetic type electricity saving, silent ac contactor
01/24/1990CN1006589B Designing method for d.c. electromagnet
01/17/1990CN2051394U Ac contactor for multi-loop control
01/10/1990CN1038720A Convenient multi-functional contactor
01/09/1990US4893213 Multi-stage solenoid with time delayed actuation
12/1989
12/20/1989CN2049821U Power saving ac contactor
12/19/1989CA1263973A1 Terminal assembly for electrical apparatus
12/14/1989DE3918351A1 Starter system for the internal combustion engine of a motor vehicle
12/13/1989EP0345954A2 High switching speed, coaxial switch for R.F. signals
12/13/1989EP0345412A2 Remotely controllable circuit breaker with improved arc drive structure
12/13/1989EP0345411A2 Remotely controllable circuit breaker
12/13/1989CN2049404U Ac contactor with power supply output
12/12/1989US4887056 Magnet switch for a starter
12/06/1989EP0345066A2 Electromagnetic contactor tandem control system for thermal protection of a bidirectional motor drive
11/1989
11/30/1989DE3818020A1 Electromagnetic relay
11/29/1989EP0343554A2 Electromagnetic relay
11/23/1989EP0342572A2 Electromagnetic relay
11/16/1989DE3823574C1 Drive for a transmission with a motor having a reversible rotation direction
11/15/1989EP0198085B1 Electromagnetic actuator
11/14/1989US4881054 Relay drive for polarized relay
11/14/1989US4881053 Electromagnetic relay
11/08/1989CN2047447U E shaped iron core direct-acting type mechanical locking contactor
11/08/1989CN2047446U Magnetic guarded power supply switch
11/01/1989CN2047066U Ac contactor with self-locking machinery
10/1989
10/25/1989CN2046684U Energy saving contactor
10/25/1989CN2046683U Improved pivoted contactor
10/24/1989US4876418 Device for rendering contactors electrically and mechanically inoperative
10/19/1989DE3910461A1 Starter
10/18/1989EP0337900A1 High sensitivity electromagnetic tripper
10/18/1989CN2046273U Bistable contactor, electric relay
10/04/1989EP0335002A2 Automatic transfer switch
09/1989
09/27/1989EP0334393A2 Electromagnetic relay with symmetric reaction
09/27/1989EP0334336A1 Polarised electromagnetic plural contact relay
09/26/1989US4870385 High switching speed, coaxial switch for R.F. signals
09/06/1989EP0331134A2 Flat-typ relay particularly flat-typ miniature relay
09/06/1989CN1035391A Automatic breaker for electrically boiling water
08/1989
08/30/1989CN2043787U Micro watt-consumption contactor
08/29/1989US4862123 Solenoid for electric starters
08/23/1989EP0329138A1 Electromagnetic relay
08/23/1989CN2043423U High efficiency magnetic preservation relay
08/23/1989CN1035021A Pressure-rotary programmable and power-saving relay
08/22/1989US4859975 Electromagnetic actuator
08/08/1989US4855701 Polarized electromagnet
08/08/1989US4855699 Self-cutoff for latching coaxial switches
08/03/1989DE3802688A1 Polarised relay
08/02/1989CN2042242U Reversible ac contactor
08/02/1989CN2042241U Contactor operated without electricity
08/02/1989CN2042240U Electricity-saving device for ac contactor
07/1989
07/25/1989US4851802 Electromagnetic relay
07/25/1989US4851801 Microwave C-switches and S-switches
07/19/1989EP0324262A1 Electromagnetic actuator
07/18/1989CA1257632A1 Electromagnetic relay
07/12/1989EP0323461A1 Direction inversion circuit for dc drives.
07/11/1989US4847580 Solenoid-operated switch for a starter
07/05/1989CN2040672U Ac contactor cutout sound deadening electricity saver
07/04/1989CA1256927A1 Bi- or monostable operation polarized electromagnet
06/1989
06/28/1989EP0321664A2 A polarized electromagnet
06/27/1989US4843360 Polarized electromagnetic relay
06/21/1989EP0320686A2 Electromagnetic switchgear
06/14/1989CN2039463U Energy-saving electric contactor
06/14/1989CN2039462U Magnetic starter
06/13/1989US4839619 Relay for wideband signals
06/06/1989US4837537 Reed switch device
05/1989
05/31/1989CN2038668U Auxiliary switch with long service life
05/30/1989CA1254929A1 Low profile electromagnetic relay suitable for being mounted to printed circuit board
05/24/1989EP0316363A1 Electromagnetic switch, in particular for cranking devices of internal combustion engines.
05/24/1989CN2038279U Energy-saving operating device of a.c. contactor
05/23/1989US4833435 Electromagnetic relay
05/17/1989CN2037871U Multi-stage voltage relay
05/16/1989US4831348 Low profile electromagnetic relay to printed circuit board
05/10/1989EP0314683A1 Circuit protector
05/10/1989CN2037499U Contact maker by permanent magnet keep closing
05/03/1989CN2037108U 电磁继电器 Electromagnetic relays
05/02/1989US4827234 Electromagnetic relay
05/02/1989CA1253539A1 Polarized electromagnetic actuator device
04/1989
04/26/1989EP0313385A2 Electromagnetic relay
04/25/1989US4825180 Solenoid switch for use in engine starter motor
04/25/1989US4825179 Electromagnetic relay with pivotable armature
04/25/1989CA1253182A1 Polarized electromagnetic relay
04/19/1989CN2036323U Combined speedy electricity leakage protector
04/19/1989CN2036312U Point moving electricity saving ac contactor
04/19/1989CN2036311U Magnetism maintaining type electromagnetic relay switch
04/12/1989CN2035918U 节能接触器 Saving contacts
04/12/1989CN2035917U Dc relay
04/05/1989CN1003822B Electromagnetic actuator
04/04/1989US4819118 Electromagnetic contactor tandem control system for thermal protection of a bidirectional motor drive
03/1989
03/30/1989DE3830817A1 Electromagnetic switch
03/29/1989EP0308819A2 Electromagnetic relay
03/29/1989EP0308546A2 Switchable electromagnetic pulse relay
03/28/1989US4816794 Electromagnetic relay
03/28/1989US4816793 Solenoid with alternate current path for direct mounting on engines
03/28/1989CA1251816A1 Electromagnetic apparatus combined a pair of contactors into one unit
03/22/1989CN2034738U Automatic cut-off protection multifunctional controller
03/21/1989CA1251495A1 Electromagnetic contactor
03/15/1989EP0225388B1 Electromagnetic actuator
03/14/1989US4812794 Electrical relay apparatus
03/07/1989US4811153 Circuit protector
03/01/1989EP0304420A1 Electromagnetic switching device
02/1989
02/22/1989EP0304185A2 Enclosed electromagnetic relay
02/22/1989EP0303807A1 High-frequency power switch
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