Patents for H01F 27 - Details of transformers or inductances, in general (43,362)
11/1987
11/12/1987DE3615529A1 Zuendspule fuer zuendanlagen von brennkraftmaschinen Ignition coil for ignition systems of internal combustion machinery
11/12/1987DE3615307A1 Air-cored coils for automatic SMD fitting
11/11/1987EP0245083A1 A ferrite core and a transformer or inductor including it
11/11/1987EP0244521A1 Engine starter
11/10/1987US4706058 Miniature inductor with molded cover
11/10/1987US4706017 Electrical current sensor
11/05/1987DE3615036A1 Process for rendering transformers reusable, which are contaminated with PCB and other residues damaging the environment
11/05/1987DE3613861A1 Silenced inductive electrical component
11/05/1987DE3613690A1 Self-supporting, screened primary high-voltage device, and a method for its production
11/04/1987EP0243862A2 Electric converter
11/04/1987EP0243738A2 Transformer for a regulated switched-mode power supply
11/03/1987US4704592 Chip inductor electronic component
11/03/1987US4704578 Thermal compensation method for a magnetic circuit having an oscillating circuit with an inductance coil
10/1987
10/29/1987DE3613862A1 Inductor or transformer having fastening means on a printed circuit board
10/29/1987DE3613797A1 Device for transmitting electrical signals
10/28/1987EP0242734A2 Method and device for cooling a resistive magnetic system for nuclear magnetic resonance tomographs
10/28/1987CN87100299A Apparatus and method for cooling the core of liquid cooled transformer
10/22/1987WO1987006387A1 Output-type electromagnetic transducer
10/22/1987DE3708804A1 Transformer
10/22/1987DE3612209A1 Transformer having a core which consists of two outer limbs and one centre limb
10/20/1987US4701830 Electronic circuit module
10/20/1987US4700440 LC filter manufacturing method
10/15/1987DE3611906A1 Transformer or inductor for intermittent operation by pulsing at a clock frequency
10/14/1987EP0241068A1 Device comprising a core consisting of parts of amorphous ferromagnetic metal and parts of non-amorphous ferromagnetic material
10/14/1987CN87200588U Oil-pressure releaser
10/14/1987CN87101981A Resin casting coil
10/14/1987CN87101947A Improvement in induction apparatus
10/13/1987US4700167 Bobbin construction with strain relief
10/13/1987US4700166 Current transformer having a rectangular iron core
10/13/1987US4699667 Removing residual PCB S from transformers
10/13/1987CA1228135A1 Resonant tag circuits useful in electronic security systems
10/13/1987CA1228131A1 Transformer having concentric coils
10/07/1987CN86207283U Wire coil on concentric ring
10/06/1987US4698605 Monolithic LC feed-through filter having a ferrite body with a re-oxidized capacitive layer
10/06/1987US4698197 Filler, nonmagnetic conductive, single magnetic particles
09/1987
09/29/1987US4696100 Method of manufacturing a chip coil
09/24/1987WO1987005743A1 A wound transformer core and method of manufacturing same
09/24/1987DE3609617A1 Coil core
09/23/1987EP0238475A1 Fire extinguishing apparatus
09/22/1987CA1227026A1 Process for treating contaminated transformer oil
09/16/1987EP0237344A2 Improvements in induction apparatus
09/16/1987EP0236671A1 Apparatus and method for cooling the core of a liquid cooled transformer
09/16/1987EP0236642A1 High-voltage connection device, particularly for a high-voltage transformer
09/16/1987CN87100199A Coil assembly and support system for transformer, transformer employing same and method for manufacture thereof
09/15/1987US4694140 AC power supply
09/10/1987DE3607025A1 Ferrite chip inductance
09/08/1987US4692566 Ribbon cable
09/01/1987CA1226342A1 Dielectric well logging system with electrostatically shielded coils
09/01/1987CA1226341A1 Thermal compensation process for magnetic circuits
08/1987
08/27/1987WO1987005148A1 High voltage transformer
08/25/1987US4689731 MOSFET inverter gate drive circuit
08/25/1987US4689593 Transformer with balanced transmission lines
08/13/1987DE3604028A1 Fine air-gap matching for induction energy converter (transducer)
08/13/1987DE3603720A1 Ignition transformer which is operated using high frequency (radio frequency), for oil or gas burners
08/12/1987EP0232197A1 Method of making an inductive chip-component
08/11/1987US4685972 Solubilizing polychlorinated biphenyls in atransformer with a dielectric fluid
08/06/1987DE3603473A1 Method and device for producing magnetic annular cores (toroidal cores)
08/06/1987DE3602759A1 Inductive surface mounted device (SMD)
08/05/1987EP0230811A2 Ignition coil with a closed magnetic circuit
08/05/1987CN86204065U Device for increasing va capacity of regulating transformer
08/04/1987US4684912 Winding form for high voltage transformer
08/04/1987US4684882 Electrical transformer having a solid core surrounding winding in a loop configuration
08/04/1987CA1225125A1 Negative resistance compensated transformer
07/1987
07/29/1987EP0230185A1 Method of producing magnetic cores for stabilization ballast in an assembly of lamps of varying discharge
07/23/1987DE3601475A1 Transformer
07/22/1987CN86204194U Box-type explosion-proof metal expander
07/21/1987US4682068 Liquid cooled static excitation system for a dynamoelectric machine
07/21/1987US4682000 Welding transformer and rectifier assembly
07/16/1987WO1987004298A1 Magnetic circuit device provided with a current coil
07/09/1987DE3700079A1 Five-limbed core for large three-phase transformers
07/07/1987US4678927 Circuit arrangement for large power transformers
07/07/1987US4677960 High efficiency voltage doubling ignition coil for CD system producing pulsed plasma type ignition
07/07/1987CA1223931A1 Non-magnetic core current sensor
07/02/1987WO1987004001A1 Transformer with amorphous alloy core having chip containment means
07/02/1987WO1987004000A1 Clamping means for the core and coil assembly of an electric transformer
07/02/1987DE3546400A1 Magnetic head (magnet head)
07/01/1987EP0226793A1 Wound ferrite ring core impermeably encapsulated by a liquid resin or by a synthetic thermoplastic resin
06/1987
06/30/1987US4677538 Sweep transformer with terminating PC board
06/30/1987US4677411 Explosion-proof or flame-proof plug having a transformer disposed in a compression-resistant chamber
06/30/1987US4677255 Insulating shroud and sleeve for the connection between a cable end and a terminal
06/30/1987US4676266 Pressure relief device
06/25/1987DE3539037A1 Plug-in coil for electronic purposes
06/23/1987US4675638 Ferromagnetic multiple shell core for electric coils
06/23/1987US4674344 Engine starter
06/18/1987WO1987003738A1 Amorphous metal transformer core and coil assembly and method of manufacturaing same
06/18/1987WO1987003737A1 High-voltage connection device, particularly for high voltage transformer
06/18/1987WO1987003736A1 Magnetic circuit with low radiated magnetic field, particularly for a high voltage transformer supplying a cathode tube
06/16/1987US4673907 Transformer with amorphous alloy core having chip containment means
06/16/1987EP0225830A1 Method for producing a magnetic circuit with a low magnetic-leakage field, in particular for a high-voltage transformer supplying a cathode ray tube
06/16/1987EP0225392A1 Resin-bonded magnetic composition and process for producing magnetic molding therefrom
06/11/1987DE3543584A1 Transformer with a fusing (protection) device
06/10/1987EP0225316A1 Method and apparatus for winding wedge-shaped segments for an electrical coil of an electrical transformer
06/10/1987EP0225241A1 Coreless-type high-frequency current transformer
06/09/1987US4672358 Surface-mounted power resistors
06/09/1987US4672348 Electrical coil assembly and terminal therefor
06/03/1987EP0224072A1 Transformer with a protective device
06/03/1987EP0223954A1 Inductance for a controlled rectifier, particularly for high voltage direct current transmission installations
06/03/1987EP0136332B1 Wire coil assembly for matrix print head and manufacturing method
06/02/1987US4670625 Electrical insulating bushing with a weather-resistant sheath
05/1987
05/26/1987US4668931 Composite silicon steel-amorphous steel transformer core