Patents
Sitemap › H01 - Basic electric elements › H01F - Magnets; Inductances; Transformers; Selection of materials for their magnetic properties › H01F 27 - Details of transformers or inductances, in general
Patents for H01F 27 - Details of transformers or inductances, in general (43,362)
12/1990
12/12/1990EP0401983A1 Thin film device for rotational magnetic flux conduction
12/11/1990US4977491 High frequency transformer with a printed circuit winding in particular for a very high voltage power supply
12/11/1990US4977301 High-frequency heating apparatus using frequency-converter-type power supply
12/11/1990CA1277730C Winding form for high voltage transformer
12/05/1990EP0400619A1 Method to produce an encased transformer
12/05/1990EP0400343A1 Current transformer with increased precision
12/05/1990EP0400112A1 High-voltage winding for core-form power transformers
12/05/1990CN2067028U Ventilation device for signal transformer casing
12/04/1990US4975797 Arrester with external isolator
12/04/1990US4975672 High power/high frequency inductor
12/04/1990US4975671 Transformer for use with surface mounting technology
12/04/1990US4975670 Air cooled transformer
12/04/1990CA1277379C High frequency ignition transformer for oil or gas burners
11/1990
11/29/1990WO1990014674A1 Valve choke, especially for high-voltage dc transmission systems
11/29/1990WO1990014673A1 Coil for transformers, in particular high-voltage transformers
11/29/1990DE3917212A1 Spule fuer transformator, insbesondere hochspannungstransformator Coil for transformer, in particular high voltage transformer
11/28/1990EP0399779A1 An electronic component with a fastener
11/28/1990CN2066613U 35kv winding structure for transformer
11/27/1990US4973930 Twin coil
11/27/1990CA1276974C Welding transformer and rectifier assembly
11/22/1990EP0398567A2 Method of operating AC magnetic devices with high efficiency at high frequency
11/22/1990EP0398036A2 Transformer
11/21/1990CN1047164A Gas-insulated transformer
11/20/1990US4972168 Transformers and cores for transformers
11/20/1990US4972167 Electric noise absorber
11/20/1990US4970776 Method of manufacturing a stationary induction electric apparatus
11/14/1990EP0397373A2 Improvements in safety insulated transformers
11/14/1990EP0396949A2 Gas insulated transformer
11/13/1990US4970476 Electric noise absorber using a granular or liquid magnetic substance
11/13/1990US4970353 Protective cover for exposed transformer terminals
11/08/1990DE3913558A1 Transformer with ferrite windings - has core with primary and secondary coils arranged on common sections in alternate manner
11/07/1990CN2065354U Symmetrical magnetic-saturation voltage regulator
11/01/1990WO1990013135A1 Improved surface-mountable air core inductor
10/1990
10/31/1990EP0395511A1 Device for fixing an ignition coil, particularly for internal combustion engines for motor vehicles
10/31/1990EP0395037A2 Transformer for switching regulated power supply applications
10/31/1990EP0395013A1 Wound- and welded terminal for a surface mountable inductive electric component
10/31/1990EP0395012A1 Coil former for electric bobbin
10/31/1990EP0394833A1 Terminal Device
10/31/1990DE4013130A1 Ignition coil for vehicle engines - has coil former with projections to fix width of air gap
10/31/1990CN2064930U Main insulating structure for 10 kv transformer
10/31/1990CN2064929U Winding structure without small oil corners
10/31/1990CN2064928U Winding structure of transformer with semi-mixed inserters for correction of high voltage
10/30/1990US4967175 Inductor and carrier suitable for attaching to a hybrid substrate or the like
10/29/1990CA2015680A1 Gas-insulated transformer
10/25/1990DE4011294A1 Laminated noise and interference LC filter - has specified ratio of power inductances in regions forming capacitances
10/25/1990CA2015123A1 Terminals for coil body of electrical coils
10/24/1990EP0393644A2 LC noise filter
10/24/1990EP0393599A2 Surface mounted electric coil
10/24/1990CN2064535U Transformers with adjustable width of pulse
10/18/1990WO1990012439A1 Device for a.c. cut-in limitation
10/18/1990DE4011170A1 Switching surge limiting circuit for AC power source - has phase angle control for delaying switch=on point of source w.r.t. occurrence of natural zero of system voltage
10/16/1990US4964013 Electric noise absorber
10/16/1990US4963696 Tamper resistant padmounted transformer
10/11/1990DE3911573A1 Double-E core for transformer and induction coils
10/10/1990EP0377691A4 Matrix transformer having high dielectric isolation
10/10/1990CN2063684U Combination hydraulic laminating and turning platform for iron core of transformer
10/10/1990CN2063683U Track transformer for middle ac continuous track circuit
10/04/1990DE3910591A1 Winding for an inductive electrical apparatus
10/04/1990DE3910118A1 Converter and transformer
10/03/1990EP0390643A1 Transformer of the closed ferrite magnetic circuit type
10/03/1990EP0389892A1 Transformer
10/03/1990EP0389678A1 Method of making a surface mountable electronic device
10/03/1990CN2063282U Main insulation structure for 35 kv transformer
10/03/1990CN2063281U Low-loss small transformer
10/03/1990CN2063280U Transformer triggered by thyristor
10/03/1990CN2063279U Box-type voltage-releasing metal expander
10/03/1990CN2063278U High-current sleeved conducting rod
10/03/1990CN1045889A Amorphous core joint containment
09/1990
09/29/1990CA2003628A1 Method of making a surface mountable electronic device
09/27/1990DE3908049A1 Active current-voltage converter
09/26/1990EP0389344A1 Transformer printed on printed circuit and power-dividing printed circuit having such a transformer
09/25/1990US4959505 Electrical component in chip structure and method for the manufacture thereof
09/25/1990CA1274590A1 Passive electric component
09/25/1990CA1274588A1 Face connected instrument transformer
09/20/1990DE4006697A1 Transformator Transformer
09/20/1990DE3908841A1 Arrangement for damping high-frequency oscillations of an electric voltage
09/19/1990EP0388146A1 Ignition coil for internal combustion engine
09/19/1990EP0387994A2 High temperature transformers
09/19/1990EP0387558A2 Amorphous core joint containment
09/19/1990EP0387441A1 Surface-mounted-type inductance element
09/19/1990CN1009686B Passive electric component
09/18/1990USRE33345 Toroid transformers and secondary windings
09/14/1990CA2012044A1 Amorphous core joint containment
09/13/1990DE3907287A1 Transformer having windings composed of main conductors and additional conductors
09/12/1990CN2062111U Adjustable transformer
09/12/1990CN2062110U Track transformer for small ac continuous track circuit
09/12/1990CN2062109U Breathing device for fuel tank
09/12/1990CN2062108U Shaped cross section al, cu strip coil
09/12/1990CN1009596B Method and arrangement for controlling the magnetizing current passing through a transformer
09/11/1990US4956745 Transformer assembly with exposed laminations and hollow housings
09/11/1990US4956627 High-frequency component
09/11/1990US4956626 Inductor transformer cooling apparatus
09/05/1990EP0385220A1 Coil device
09/04/1990US4954940 Plug in power converter structure
09/04/1990US4953286 Method of making a transformer core
08/1990
08/30/1990DE4001968A1 Ignition coil for motor vehicles - embedded in specified casting compound for winding and injection moulding for unit
08/29/1990EP0383988A1 High-voltage lead-through for oil-cooled electric devices
08/28/1990US4952899 Shunt holding means for ballasts
08/28/1990US4952898 Transformer secondary buss adapter apparatus
08/28/1990US4951641 Ignition coil assembly structure for an internal combustion engine
1 ... 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 ... 434