Patents
Sitemap › H01 - Basic electric elements › H01F - Magnets; Inductances; Transformers; Selection of materials for their magnetic properties › H01F 7 - Magnets
Patents for H01F 7 - Magnets (20,067)
12/1989
12/05/1989US4884954 Twin coil apparatus and energizing structure therefor
11/1989
11/30/1989DE3817571A1 Armature holder for an electromagnetic drive
11/29/1989EP0344100A1 Electro-magnetical device for looms
11/29/1989EP0343161A1 Solenoid driver control circuit with initial boost voltage.
11/29/1989EP0274481B1 Two-axis force motor
11/29/1989CN1037612A Fast drive circuit of electromagnetic winding
11/28/1989US4883025 Potential-magnetic energy driven valve mechanism
11/23/1989EP0342733A2 Improvements in and relating to electromagnetic actuators
11/23/1989DE3815248A1 Solenoid for a solenoid valve
11/21/1989US4882560 Coil arrangements in magnetic resonance apparatus
11/21/1989US4882558 Solenoid assembly
11/21/1989US4881984 Radial orientation and compaction by heating an evacuated and sealed container charged with gas-atomized particles of a rare earth metal/fe/b/ alloy
11/21/1989CA1263134A1 High sensitivity magnetic actuator
11/16/1989DE3839746A1 Method and device for controlling the excitation current (energising current) during the switching-off process of electromagnets
11/15/1989EP0198085B1 Electromagnetic actuator
11/14/1989US4881139 Latch mechanism for rotary actuator and the like
11/14/1989US4881035 Magnetic structural arrangement of an installation for nuclear magnetic resonance tomography with superconducting background field coils and normal-conducting gradient coils
11/14/1989US4881034 Switchable MRI RF coil array with individual coils having different and overlapping fields of view
11/14/1989US4880999 Solenoid
11/08/1989EP0340860A1 Superconductive magnet system comprising superconductive cylinders
11/07/1989US4879539 Laminated coil for an eddy-current type strong AC magnetic field generator
11/02/1989WO1989010511A1 Magnetic valve with permanent magnet closing force
11/02/1989EP0339339A2 Modulated electrically operated refrigerant valve
11/02/1989EP0221921B1 Ironless solenoidal magnet
11/02/1989EP0203952B1 Ironless solenoidal magnet
11/01/1989CN2047060U High-operating-frequency energy saving dc electromagnet
11/01/1989CN1036859A Electromagnet for operating contact maker switch
10/1989
10/31/1989US4878024 Magnetic resonance apparatus comprising a low-noise gradient coil
10/31/1989US4878023 Magnetic resonance apparatus comprising an improved gradient coil system
10/25/1989EP0338175A1 Manufacture of armatures for solenoid assemblies in a matrix print head, and armature of the clapper type
10/25/1989CN2046675U Energy saving electromagnet
10/24/1989US4876510 Apparatus for nuclear spin tomography having superconducting base field magnetic coils and a radiation shield
10/24/1989US4876305 Curable mixture of epoxy resin, aminosilane or polyaminosilane, and epoxysilane; protective coatings
10/24/1989US4875658 Electromagnetic valve
10/19/1989WO1989009901A1 Magnetic sealing device and process for producing the same
10/19/1989DE3822198A1 Magnetische dichtungsvorrichtung Magnetic compacting device
10/19/1989DE3811670A1 Method for the compensation of the change in the positioning force of an electromagnetic drive for a proportional valve caused by temperature-induced resistance changes
10/12/1989DE3811071A1 Solenoid injection valve for internal combustion engines
10/12/1989DE3811003A1 Solenoid injection valve for internal combustion engines
10/12/1989DE3810826A1 Solenoid injection valve for internal combustion engines
10/12/1989DE3810747A1 Holding device
10/11/1989EP0336922A1 Electromechanical actuator for the control-elements of injector-pump units
10/11/1989EP0336728A2 Apparatus for tuning an NMR field coil
10/11/1989CN1036288A Two-way proportional ehectromagnet with amplifier and without excitating coil
10/10/1989US4873504 Bonded high energy rare earth permanent magnets
10/10/1989US4873503 Electrical coils
10/05/1989WO1989009356A1 Sealing member for sealing magnetic fluid
10/05/1989WO1989009355A1 Sealing member for sealing magnetic fluid and method of producing same
10/05/1989DE3810154A1 Solenoid valve having permanent-magnet latching
10/03/1989USH693 PYX twister with superconducting confinement
10/03/1989US4871989 Solenoid with manual actuation mechanism
09/1989
09/27/1989EP0334382A1 Magnet apparatus for use in magnetic resonance imaging system
09/27/1989CN1035877A Solenoid valve control circuit
09/26/1989US4870381 Search coil assembly for metal detectors
09/26/1989US4870380 Magnet arrangements
09/26/1989US4870364 Method of, and apparatus for, monitoring the operation of electromagnetic hydraulic valves
09/26/1989US4870335 Rotary actuator
09/26/1989CA1261036A1 Automotive valve actuation method
09/21/1989WO1989008922A1 Elctromagnet for an atomic absorption spectrometer
09/20/1989EP0332614A1 Apparatus for air gapping the armature in a compound spool valve.
09/19/1989US4868707 Superconducting electromagnet apparatus
09/13/1989EP0332176A2 Magnet apparatus for use in magnetic resonance imaging system
09/12/1989US4865290 Solenoid mounting bracket
09/08/1989WO1989008209A1 Electromagnetic single-disk brake
09/05/1989US4864264 Bistable toggling indicator
09/05/1989US4864240 Magnet systems
09/05/1989US4863143 Solenoid actuator
09/05/1989US4863142 Electromagnetic solenoid valve with variable force motor
08/1989
08/31/1989DE3805031A1 Schaltungsanordnung zur getakteten versorgung Circuit arrangement for the clocked supply
08/30/1989EP0329666A1 Spherical permanent magnet with equatorial access
08/30/1989CN1035045A Magnetic lock device
08/29/1989US4862128 Field adjustable transverse flux sources
08/29/1989US4862127 Solenoid shock absorbing bumper arrangement and method
08/29/1989US4862126 Superconducting shielded PYX PPM stacks
08/29/1989US4862087 Process and apparatus for homogenizing a static magnetic field
08/29/1989US4862085 Method of regulating the magnetic field delivered by a resistive magnet, a resistive magnet system using this method and an installation for forming images by nuclear magnetic resonance incorporating such a system
08/29/1989US4861752 High-field permanent-magnet structures
08/29/1989US4861308 Drive control mechanism for spring-driven toy
08/24/1989WO1989007831A1 Circuit arrangement for cyclic supply
08/23/1989EP0328537A1 Cylindrical permanent magnet for producing a uniform and transverse induction field.
08/23/1989CN2043412U Self-locking type weakening-control explosion-proof electromagnet
08/23/1989CN2043311U Solenoid valve core
08/22/1989US4859976 Periodic permanent magnet structures
08/22/1989US4859975 Electromagnetic actuator
08/22/1989US4859973 Superconducting shielded PYX PPM stacks
08/22/1989US4859947 Magnetic resonance imaging apparatus comprising a stacked surface coil system
08/22/1989US4858452 Automobile power door lock
08/17/1989DE3844396A1 Control method and system for a hydraulic actuator (servo)
08/17/1989DE3803374A1 Solenoid-operated injection valve
08/16/1989EP0328194A1 Potential-magnetic energy driven valve mechanism
08/16/1989EP0327894A1 Magnetic control drive
08/16/1989EP0327605A1 Cylindrical nmr bias magnet apparatus employing permanent magnets and methods therefor
08/16/1989EP0327554A1 Magnetic block with adjustable magnetization for producing a permanent magnetic field in a zone of interest.
08/15/1989US4857875 Yoke
08/15/1989US4857874 Multilayered-eddy-current-type strong magnetic field generator
08/15/1989US4857873 Magnet structure
08/15/1989US4857848 Nuclear magnetic resonance imaging apparatus
08/15/1989US4857188 Iron powder attracting magnet
08/10/1989DE3802648A1 Electromagnetically actuated hydraulic quick-action switching valve
08/10/1989DE3802474A1 Arrangement for producing a homogeneous, frequency-independent alternating magnetic field
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