Patents
Sitemap › H01 - Basic electric elements › H01F - Magnets; Inductances; Transformers; Selection of materials for their magnetic properties › H01F 38 - Adaptations of transformers or inductances for specific applications or functions
Patents for H01F 38 - Adaptations of transformers or inductances for specific applications or functions (13,550)
03/1991
03/26/1991CA1282010C Inductive coupled power system
03/21/1991WO1991003824A1 Rotary electric machine
03/20/1991EP0418137A1 Ignition coil, particularly for an internal combustion engine of an automotive vehicle
03/20/1991EP0418136A1 High voltage connection for an ignition coil, particularly for an internal combustion engine of an automotive vehicle
03/20/1991EP0417542A1 Inductive coupling device for 2-wire lines
03/19/1991US5001585 Rotational transformer for a tape recorder
02/1991
02/27/1991EP0414236A2 Optical transformer
02/21/1991DE3927235A1 HV leakage field transformer - has sec. winding produced as readily replaceable module and circular laminated core
02/20/1991CN1049395A 点火线圈 Ignition coils
02/20/1991CN1049394A 点火线圈 Ignition coils
02/13/1991EP0412679A1 Ignition coil
02/13/1991EP0412678A1 Ignition coil
02/12/1991US4992624 Magnetic shield for visual display terminals
02/12/1991CA1280166C Power supply magnetic shunt for transmission line sensor module
02/10/1991CA2013124A1 Ignition coil
02/10/1991CA2012485A1 Ignition coil
02/07/1991DE3925807A1 Combined current and voltage transducer - is built into metal housing of fluid-isolated switching equipment
02/05/1991US4990881 Ignition coil with permanent magnet
02/05/1991US4989575 Ignition device for internal combustion engine
01/1991
01/30/1991EP0410526A1 Generator for generating an electric voltage
01/22/1991US4985984 Ignition coil for internal combustion engine
01/09/1991CN1011170B Electric converter
01/09/1991CN1011155B Ignition coil for ignition system of internal combustion engines
01/08/1991US4983859 Magnetic device for high-voltage pulse generating apparatuses
01/08/1991US4982498 Method of making a high-voltage transformer
01/03/1991DE3921786A1 Non-contact power transmission between inductive stationary and moving - has transmission provided by transformer mounted on unit
01/02/1991EP0405081A1 Diode-split transformer
12/1990
12/27/1990CA1278350C Combined high-voltage current and voltage transformer
12/25/1990US4979486 Ignition coil-incorporated distributor for internal combustion engines
12/18/1990US4979087 Inductive coupler
12/13/1990WO1990015241A1 Ignition integrated system for internal combustion motors
12/12/1990EP0401490A1 Diode-split transformer with a single-layer cylindrical coil as primary winding
12/11/1990CA1277730C Winding form for high voltage transformer
12/05/1990EP0400271A2 Multi-stage insulating transformer type high voltage generating apparatus
12/05/1990CN1010721B Combined high-voltage current and voltage mutual-inductor
12/04/1990CA1277379C High frequency ignition transformer for oil or gas burners
11/1990
11/27/1990US4973930 Twin coil
11/15/1990DE3915113A1 Ignition system - for otto cycle engine with screened ignition coil on each spark plug
11/13/1990WO1990013742A1 High efficiency, high output, compact cd ignition coil
11/13/1990CA2032488A1 High efficiency, high output compact cd ignition coil
10/1990
10/31/1990EP0395513A1 Low-voltage connector for ignition coil, particularly for internal combustion engines for motor vehicles
10/31/1990EP0395512A1 Ignition coil, particularly for internal combustion engines for motor vehicles, and means for securing the primary and secondary assemblies
10/31/1990EP0395511A1 Device for fixing an ignition coil, particularly for internal combustion engines for motor vehicles
10/31/1990EP0394824A1 Inductive sensor with variable reluctance
10/31/1990DE4013132A1 Construction of secondary winding former of ignition coil - is formed with mechanical clamping elements to couple units together
10/31/1990DE4013131A1 Connection for primary coil of ignition coil - has terminal shaped to provide location for external connection plate
10/31/1990DE4013130A1 Ignition coil for vehicle engines - has coil former with projections to fix width of air gap
10/30/1990US4967145 Active current transformer
10/30/1990US4967121 Isolating high voltage transformer for video apparatus
10/30/1990CA1275688C Two capacitor apparatus for sequential starting and operation of multiple series connected discharge lamps
10/24/1990EP0393582A2 Rotary magnetic head device and rotary transformer used therefor
10/18/1990WO1990012274A1 A contactless travel measuring system
10/10/1990EP0377691A4 Matrix transformer having high dielectric isolation
10/09/1990US4962361 Ignition coil for engine
10/04/1990DE3910297A1 Beruehrungslos arbeitendes wegmesssystem Contact optical distance measuring system
10/03/1990EP0390643A1 Transformer of the closed ferrite magnetic circuit type
10/02/1990US4960099 Distributor for internal combustion engine
09/1990
09/25/1990CA1274588A1 Face connected instrument transformer
09/20/1990WO1990010940A1 Current transformer arrangement for three-wire three-phase systems, especially to detect the actual current for controlled dc consumers powered via current rectifiers
09/20/1990DE3908107A1 Gas-insulated combined current transformer and voltage converter
09/19/1990EP0388146A1 Ignition coil for internal combustion engine
09/19/1990EP0387993A1 Internal combustion engine ignition apparatus having a primary winding module
09/19/1990EP0387992A1 Spark developing apparatus for internal combustion engines
09/13/1990CA2011844A1 Gas insulated combined current and voltage converter
09/12/1990EP0386319A2 Magnetic DC to DC converter with reduced temperature drift
09/07/1990WO1990010154A1 Method and high voltage increaser device for i.c. combustion motors
09/05/1990EP0385502A2 Electric power transmitting device with inductive coupling
09/05/1990EP0385220A1 Coil device
08/1990
08/30/1990DE4001968A1 Ignition coil for motor vehicles - embedded in specified casting compound for winding and injection moulding for unit
08/28/1990US4952899 Shunt holding means for ballasts
08/28/1990US4951641 Ignition coil assembly structure for an internal combustion engine
08/21/1990US4951024 High efficiency saturating reactor for starting a three phase motor
08/21/1990CA1273053A1 Voltage doubling coil for cd system producing pulsed plasma ignition
08/14/1990US4947543 Method of winding wire on inner surface of cylindrical member
08/08/1990EP0380788A1 Device for the connectorless power supply and data-linking of portable workshop measuring apparatuses
08/02/1990DE3902219A1 Compartment coil former for the high-tension transformer of a television receiver
08/01/1990EP0379641A1 Ignition coil assembly for internal combustion engine
07/1990
07/24/1990US4943763 Ferroresonant transformer with dual outputs
07/19/1990DE4000411A1 Capacitive voltage converter with voltage divider - has resonance choke coil and intermediate converter connected at divider point
07/19/1990DE3900962A1 Secondary coil former with a high-voltage dome
07/18/1990EP0377691A1 Matrix transformer having high dielectric isolation
07/17/1990US4942353 High frequency matrix transformer power converter module
07/17/1990US4942352 Non-contacting power supplying system
07/13/1990CA2007665A1 Capacitive voltage transformer
07/12/1990WO1990007783A1 Coil with magnetic core made from grain-oriented iron sheets
07/03/1990US4939400 Transmission apparatus having split-coil type coaxial coupler
06/1990
06/28/1990WO1990007222A1 Magneto construction
06/28/1990WO1990007056A1 Ignition electronic device for endothermic motors of small size
06/27/1990EP0375502A1 Ignition coil with a divided high-voltage winding, particularly for an internal-combustion engine
06/27/1990EP0374749A1 Rotating transformer
06/26/1990US4937547 Shunt retaining clip in a ballast
06/20/1990EP0374016A2 Inductively coupled connector for equipping surface well installations
06/13/1990EP0210991B1 Engine ignition system with an insulated and extendable extender
06/05/1990US4931699 Ballast system including a starting aid for a gaseous discharge lamp
05/1990
05/29/1990US4929005 Device for transferring electric power
05/22/1990US4928020 Saturable inductor and transformer structures for magnetic pulse compression
05/16/1990EP0368453A1 Distributor for internal combustion engine
05/15/1990US4926152 Ignition coil assembly for internal combustion engine
05/09/1990EP0366739A1 Electric transmission device
05/08/1990US4924171 System for supplying power source by electromagnetic induction coupling
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