PLURAL PART CORE

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212
This subclass is indented under the class definition.  Inductor devices comprising a core of preformed parts, each part of which may be a single integral structure of magnetic material or wherein each part may be built up of separate sheets or wires of magnetic material (e.g., and assemblage of preformed laminated magnetic leg or yoke members).

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10,20, 40+, 60, 61, 77, 83, 84+, 98, 100, 110, 117+, 130+, 155+, 172, 175+, 177, 178, 184, 196+, 210, and 211, for combinations of coil and core wherein the core may be of the plural part type. See particularly subclass 176, above, for plural part cores which are hinged for relative angular movement to permit insertion of a coil or coil conductor, and see also, subclass 210 above for plural part cores combined with means such as a clamp or wedging means, to hold the core parts together.
233,for core structure in general and note especially the search notes listed thereunder as to other fields of search for core structure including plural part core structure.

 
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Patent Number
Title
  Date
3949337 Self-induction device for generating harmonics Apr-6-1976
The present invention relates to a self-induction device capable of steep saturation when the instantaneous value of a current flowing therethrough goes beyond a given level. The device comprises an annular magnetic core including at least one toroid coil of magnetic material, an insulating structure...     
3962661 Magnetically shunted current transformer Jun-8-1976
A magnetically shunted current transformer for use with a current carrying conductor, and being of the type having a non-distributed secondary winding is disclosed. The transformer includes a magnetic core comprising first and second separable core sections adapted for placement about the conductor wherein...     
4004251 Inverter transformer Jan-18-1977
A transformer designed to operate with a pair of power switching transistors in a d.c. to a.c. inverter is described. The transformer has an assembled core whose closed magnetic path is branched. A flux steering winding is used to ensure the prior saturation of a first branch associated with a regenerative...     
4009460 Inductor Feb-22-1977
An inductor having a coil member commonly wound on a couple of closed magnetic circuits made of a soft magnetic material. A magnetic gap is provided at a part of the soft magnetic material of at least one of the two closed magnetic circuits, and a permanent magnet providing a magnetic bias is inserted...     
4048604 Magnetic core Sep-13-1977
The present invention refers to a magnetic core comprising flat magnetic plates superimposed and joined in order to constitute the toroidal form of the core, creating an internal space for the winding and a lateral air gap groove. There being assembled in the open space of the core or air gap, annulling...     
4060759 Tube-insulated shell-core current transformer Nov-29-1977
A shell-core current transformer comprising a tubular main insulator, a measuring core arranged at least substantially coaxially with the main insulator and comprising a primary winding and a secondary winding, and a protecting core, likewise arranged at least substantially coaxially with the main insulator...     
4075547 Voltage regulating transformer Feb-21-1978
A ferro-resonant, voltage-regulating transformer. The transformer has a primary winding formed about a portion of each leg in each of two spaced, juxtaposed cores. A regulated output voltage is produced at a resonant circuit formed by a capacitor and a secondary winding around another leg of the first...     
4100521 Iron core for induction apparatuses Jul-11-1978
An iron core for induction apparatuses is constructed of at least one main leg and yokes including side yokes comprising laminations of magnetic material. The magnetostriction of the yokes is smaller than that of the main legs, so that the vibration of the inductors is easily suppressed without any special...     
4160966 Stabilized reactor Jul-10-1979
A stabilized saturated reactor comprising a solid toroidal core of magnetic material. The core has at least one end face provided with plural circumferentially spaced slots. Each slot extends in a substantially radial plane with respect to the central axis of the core. Each slot has a width substantially...     
4183079 DC-AC inverter Jan-8-1980
In a DC-AC inverter having a switching circuit connected between DC input terminals and being controlled by pulses from an oscillation transformer to provide an AC output from which voltage and current feedbacks are applied to the transformer for maintaining oscillation thereof; the core of the oscillation...     
4234862 Robust polyphase transformer Nov-18-1980
A polyphase sector type transformer includes one magnetic core ring per phase, each of which has two rectilinear sides which are adjacent to each other. Each rectilinear side of one magnetic core ring is disposed contiguously with one of the rectilinear sides of an adjacent core ring whereby each magnetic...     
4259654 Flux control in tape windings Mar-31-1981
Disclosed are improved constructions for power transformers and reactors having windings of tape-formed conductor material which tend to reduce additional losses in the windings. In the improved construction for a power transformer or reactor comprising a core containing magnetic material and having...     
4298838 Transformer device Nov-3-1981
A transformer device comprises a saturable magnetic core having control and controlled windings, the saturable magnetic core being controlled in a feedback mode through switch means such as transistor switch means. The transformer device may comprise two magnetic cores and changes in magnetic resistance...     
4298853 Compact high voltage shunt reactor Nov-3-1981
A high voltage shunt reactor includes a cylindrical magnetic shell of radially extending laminated layers of magnetic material, and a coil wound within the shell having a large reactance volume within the coil. The reactor uses a portion of the nonmagnetic, reactance volume within the coil for high voltage...     
4301437 Impedance coil core Nov-17-1981
An impedance coil core which includes a plurality of core legs and yokes which interconnect the core legs in an assembled condition of the core is provided with aligned recesses in the yokes and in the core legs for accommodating tensioning bolts which extend into the recesses and press the yokes against...     
4303902 Inductive coupler Dec-1-1981
A coaxial inductive coupler having an inner magnetic core member and a surrounding outer magnetic core member each having respective windings. The inner magnetic core is operatively carried by an inner support assembly which is additionally connected to an outer protective shell. The outer core is disposed...     
4308495 Transformer for voltage regulators Dec-29-1981
A transformer for voltage regulators has a first core provided with four legs and two common base plates, which are magnetically joined to the four legs, with an input winding being wound on the first and second legs, an output winding being wound on the legs in a transformer-coupling manner to the input...     
4309655 Measuring transformer Jan-5-1982
A measuring transformer comprises a measuring conductor carrying the current I.sub.m to be measured, a pre-magnetizing winding which carries a pre-magnetizing current I.sub.v, and a magnetic field comparing means which is exposed to the magnetic field produced by the current I.sub.m and the magnetic...     
4314221 Inductance device Feb-2-1982
An inductance device comprises a drum core on which a coil is wound and which has a projection; a rectangular pot core having each concave part on the upper surface and the lower surface and having a hollow for fitting said drum core and a hole for fitting said projection of said drum core; electrode...     
4325096 Zero-phase current transformer Apr-13-1982
A zero-phase current transformer for use as a leakage current detecting element in a leakage current interrupter in which two magnetic materials of different permeabilities are provided so as to eliminate a range where the leakage current interrupter is inoperable without lowering its ability to distinguish...     
4326182 C-Core transformer Apr-20-1982
A transformer comprising two C-shaped core parts arranged to form a core ring with one or more coil formers which are molded on one core leg or on both oppositely situated core legs, the core ring being interrupted between the moulded coil formers.
4345229 Amorphous metal ballasts and reactors Aug-17-1982
A lamp ballast has a pair of adjacent gapped "O" magnetic cores made of nested, almost complete loops of amorphous metal strip with the gaps in the loops shaped and arranged under the secondary coil to simulate any type of restricted cross section for shaping the lamp current. A long slender reactor...     
4352081 Compact trans core Sep-28-1982
A compact core for a transformer wherein the central leg of the core is either trapezoidal or triangular in cross-section and wherein the two side legs of the transformer core are triangular in cross-section. The selection of a trapezoidal or triangular central core leg and triangular side legs significantly...     
4357587 Core laminations, particularly for transformers Nov-2-1982
Core laminations of the UI or EI type for iron cores, particularly for transformers, having two or three legs of equal length e and equal width f, spaced mutually apart by the same distance h, wherein the width c.sub.1 of the jointlessly connecting yoke is greater than the width c.sub.2 of the parted...     
4362990 Current- and voltage-measurement transducer Dec-7-1982
A transducer for measuring a current, includes a magnetic core which has a gap substantially impeding passage of any magnetic flux, a coil arranged to pass a premagnetizing current for producing a first magnetic field, a loop for carrying the current to be measured, so as to produce a second magnetic...     
4364020 Amorphous metal core laminations Dec-14-1982
A magnetic core for use with electrical windings characterized by a plurality of groups of butt-jointed laminations of high permeability, amorphous material with each lamination group having a layer of protective material surrounding the outermost lamination and comprising a strip of material having...     
4393364 Coil element Jul-12-1983
A coil element formed from a drum-shaped ferrite core on which a coil is wound, magnetic members each made of a magnetic and electrically conductive metal and formed so as to fit to the outer surface of the drum-shaped ferrite core and spaced from each other so as to be electrically insulated from each...     
4394636 Structure of a transformer Jul-19-1983
A transformer having a main winding and a control winding has a pair of E-shaped cores (10, 11), and an I-shaped third core (13) positioned on one E-shaped core (10). A small groove (14) is provided on the base plate (10c) of the first E-shaped core (10). A control winding (12) is wound on the I-shaped...     
4400674 Coil unit Aug-23-1983
A coil unit formed of a coil-wound inner core partially circumferentially encased by an outer core. The coil unit is mounted on a plate with the outer core externally exposed and covering the lead-in wires to the coil which are adhered to contacts on the plate.
4400675 Transformer with impedance matching means Aug-23-1983
A transformer characterized by groups of low voltage and high voltage windings inductively related to a core member, and a shunt of magnetizable microlaminations disposed between the low and high voltage windings, whereby the shunts independently adjust the transformer impedance.
4409523 Pincushion distortion correction apparatus Oct-11-1983
A pincushion distortion correction saturable reactor is a saturable transformer comprising a core having four legs, controlled and control coils being coupled to the core legs in a perpendicular relation to each other. The core gap for the controlled coil is provided in an unbalanced form, and a parabolic...     
4422061 Laminated core of transformer Dec-20-1983
In the conventional stacking method of the laminated core of a transformer, grain-oriented silicon steel sheet pieces of an identical grade or the identical magnetic properties are used as legs and yokes of the core. In a highly oriented silicon steel sheet having a high B.sub.8 value due to excellent...     
4443775 Solenoid actuator Apr-17-1984
A solenoid actuator of high performance comprising a coil surrounded externally with a magnetic frame and having a stationary core disposed therein, with a movable core attracted to the stationary core upon energizing the coil being disposed axially slidably, wherein the magnetic frame comprises a pair...     
4470006 Transformer Sep-4-1984
A transformer with twelve cores, a first six arranged in parallel rows of three, a second six, in parallel rows of three at right angles to the first six and positioned between the first and second, and second and third cores of each row of the first six; four coil assemblies each comprising a primary...     
4480477 Electrodynamic instrument transformer head Nov-6-1984
An electrodynamic instrument transformer head (10) for the non-destructive testing of materials by means of ultrasonics has a pole shoe (20) provided with exciting and receiving coils (14, 16), said pole shoe comprising a slotted end section (24) to prevent a formation of eddy currents. The end section...     
4482862 Current sensor Nov-13-1984
A current measuring system includes three toroidal magnetic cores. The first core has a non-linear B-H characteristic and being adapted for operation in and between its saturation ranges of its B-H characteristic. The second and third cores are adapted for operation in their substantially non-saturating...     
4485368 Electrical shunt reactor coil Nov-27-1984
An electrical shunt reactor coil comprises a rectangular magnetic frame in the form of two vertical members (1,2) interconnected at their ends by two horizontal yoke members (3,4). The frame members are constituted by respective stacks of magnetic laminations. A central core (7) extends across the middle...     
4498067 Small-size inductor Feb-5-1985
A small-size inductor for use in a wrist watch or a pocket size calculator includes a base member, a coil and a cap member. The base member is defined by a base plate having first and second opposite faces, a core projection extending from the first face of the base plate, and first and second terminals...     
4506248 Stacked amorphous metal core Mar-19-1985
A stacked magnetic core constructed from amorphous strip material. The legs and yokes of the core include first and second laminations formed from a non-amorphous magnetic strip material. The first and second laminations are spaced from one another to define a gap therebetween. A plurality of laminations...     
4529457 Amorphous press formed sections Jul-16-1985
This invention relates to the production of large non-planar shapes of metallic glass fabricated from ribbon. The inventive method contemplates stacking the ribbon. The stacked ribbon is formed and held at temperatures of between 70 and 90% of the crystallization temperature for a time sufficient to...     
4547705 Discharge lamp lightening device Oct-15-1985
Two fluorescent lamps are lightened by a single inverter circuit which provides switched power current to a single leakage transformer. The leakage transformer has a single primary winding coupled with said inverter circuit and a pair of secondary windings each coupled with a related fluorescent lamp....     
4547721 Transformer structure Oct-15-1985
A transformer structure is provided having three cores of laminated magnet material positioned to define two transformer winding carriers. In the preferred embodiment, each core is a pair of C-shaped sections arranged in mouth-to-mouth relationship so as to form pairs of legs joined by connecting portions....     
4557039 Method of manufacturing transformer cores Dec-10-1985
A method of manufacturing transformer cores of either the continuously wound or cut wound type using electrical steel strip having approximately a linear taper. By selecting a suitable taper, a hexagonal (or higher order) approximation of a circular cross section for the legs of the cores is produced....     
4600911 Elliptically shaped magnetic core Jul-15-1986
The magnetic core comprises a stack of plates which extend mainly along a single axial direction. The stack cross-section has as envelope a curve comprised of two half circles with a radius a/2 and of two straight lines with a length (b-a) which connect together the end points of the half circles. The...     
4613841 Integrated transformer and inductor Sep-23-1986
An electrical transformer comprises a hollow form exhibiting high magnetic permeability and interior projections extending between separable halves of the form to provide a low magnetic leakage transformer core. Primary and secondary windings are disposed around the central projections. Furthermore,...     
4656451 Electronic noise suppressor Apr-7-1987
An electronic noise suppressor has a U-shaped wire or other conductor passing through two stacked ferrite beads. The bead near the legs of the conductor is of high frequency impedance and the bead at the head of the U is of low frequency impedance. The legs of the U-shaped conductor are connected into...     
4689592 Combined transformer and inductor Aug-25-1987
A single electromagnetic structure comprising a pair of assembled oppositely positioned pot cores, first and second winding means around each of the pedestals of the cores, and a flat magnetically permeable washer-like member positioned between the windings and spaced from the pedestals and the outer...     
4749979 Transformer comprising a magnetic screen Jun-7-1988
In a transformer (1) comprising an E-I laminated core (2) with transformer windings (7) wound around the central limb (5), at least two metal-strip loops (10, 11) are provided for magnetic screening. The magnetic strips (10,11) extend around the corners (12) of the laminated core (2) at an as constant...     
4760366 Ferrite core Jul-26-1988
A ferrite core for the use of a power transformer and/or a choke coil with small size has been found. The core is assembled by a pair of identical core halves (21) together with a bobbin (31) wound a coil. Each of the core halves (21) has an E-shaped structure with a center core (23) on which a coil...     
4771257 Ballast transformer with bobbins coils Sep-13-1988
Coil bobbins are disclosed having flanged coil support portions provided with outboard terminal housings projecting beyond the flange rim and defining inwardly extending terminal-receiving cavities. The end walls of the housings are slotted to allow a wire to pass through the cavity in a circumferential...     
4800356 Shunt transformer Jan-24-1989
An AC power/step-down transformer suitable for use in switchgear for controlling electrical apparatus such as an indicator lamp has low core cost and permits economical assembly, as no interleaving of laminations is required. Its magnetic circuit comprises simple rectangular coil core assemblies whose...     
4806896 Electromagnetic shield for electromagnetic apparatus Feb-21-1989
An electromagnetic shield for electromagnetic apparatus comprises a plurality of shield coils (2-7) wound intermittently on a looped magnetic core (11). Same polarity terminals of the shield coils are connected to form current paths which prevent external fluxes .phi..sub.1, .phi..sub.2 from entering...     
4825185 Electric noise absorber Apr-25-1989
An electric noise absorber for attaching to a wire of an electronic device comprises a magnetic body divided into parts, a holding case composed of two case members and a locking device for preventing a movement of the magnetic body in the holding case. Each abutment surface of the two parts of the magnetic...     
4827237 Transformer core assembly May-2-1989
The transformer core assembly comprises a first stack of laminations having an "E" shape and including at least three legs comprising first and second, outer legs and a third, middle leg, and a second stack of laminations interlocked with the first stack by mechanical engagement of said second stack...     
4842352 Chip-like inductance element Jun-27-1989
A chip-like inductance element including a magnetic sleeve having a feed-through hole between end surfaces thereof and electrode layers fromed on the end surfaces, and a drum-like magnetic bobbin fitted in the hole such that a gap is formed between the bobbin and sleeve and including end flanges and...     
4857876 Shunt latch Aug-15-1989
A shunt latch for a core-coil of a fluorescent light ballast comprising a substantially U-shaped metal shunt which is positioned in a shunt-receiving compartment defined by a pair of adjacent flanges. The adjacent flanges are provided with barb-like protrusions which permit the shunt to be inserted into...     
4866409 Resin-crack prevented high-voltage transformer Sep-12-1989
In a high-voltage transformer such as an ignition coil for internal combustion engines, a resin-crack preventing member is provided between an iron core and a resin which is impregnated into a coil case for electrically insulating a primary coil and a secondary coil in the coil case from the iron core...     
4873505 Electric noise absorber Oct-10-1989
An electric noise absorber for holding a conduit of an electronic device comprises a retaining case composed of two box-shaped cases and auxiliary cases. A sponge-like member is fitted into the auxiliary case to prevent longitudinal movement of the cord or cable. A box-shaped case contains a magnet having...     
4882561 Electric noise absorber Nov-21-1989
An electric noise absorber for clamping to a cord or cable of an electronic device comprises a retaining case composed of two box-shaped case pieces. Each case contains a magnetic body having a recess at the upper part thereof for receiving the cord. It is possible to easily and securely attach and detach...     
4885559 Electric noise absorber Dec-5-1989
An electric noise absorber for clamping to a cord of an electronic device comprises a holding case composed of two box-shaped case members. Each case member contains a magnet having a hemi-cylindrical groove at the upper part of the magnet for receiving the cord. It is possible to easily and securely...     
4897626 Cooling electromagnetic devices Jan-30-1990
The invention provides an electromagnetic device such as a transformer which comprises one or more electrically conductive windings in a cylindrical magnetic frame. The magnetic frame defines a magnetic flux path having a length which is less than the length of the portion of the windings enclosed by...     
4910482 AC line filter Mar-20-1990
An AC line filter in which a pair of windings are wound in an opposite dition to each other and are provided at opposing locations on a main core that forms a closed magnetic path. At least one auxiliary core which forms a shorter magnetic path than the main core is positioned adjacent the main core....     
4916425 Electromagnetic device Apr-10-1990
An electromagnetic device, comprising a first, ring-shaped wound unit consisting of at least first and a second sequentially wound portions of electrically insulated layers of concentrically wound windings, the first portion being made of high permeability material, the second portion being made of a...     
4962362 Multi-magnetic field plural core transformer Oct-9-1990
A multi-magnetic field plural core transformer having two or more non-contacting core loops of ferromagnetic material, each core loop including first and second portions, the first portion of each core loop being positioned adjacent to the first portions of the other core loops with each core loop first...     
4964012 Electric noise absorber Oct-16-1990
An electric noise absorber, comprising divided magnetic substances made of ferrite, a holding member for holding the magnetic substances at its holding projections, and engaging members formed in the magnetic substances which engage with the holding projections. The electric noise absorber is attached...     
4964013 Electric noise absorber Oct-16-1990
An electric noise absorber, comprising divided magnetic substances made of ferrite, a holding member made of elastic material and fixtures for being connected to each other or fixed to a component of an electronic device, and engaging grooves formed on the outer surfaces of the magnetic substances for...     
4965712 Transformer having plural-turn core Oct-23-1990
A transformer has a multi-turn magnetic core about a loop of conductor. A bridge transformer has one turn of the core about one half of the conductor loop and a second turn of the core about the other half of the conductor loop, and an electrical center tap connection to the loop between the two halves...     
4972167 Electric noise absorber Nov-20-1990
An electric noise absorber for absorbing electric noise on an electronic device, comprising a piece or pieces of ferrite and an openable case composed of a pair of case members for containing the piece or pieces of ferrite, keeps the electric cable in position by means of two pairs of holding members,...     
5015982 Ignition coil May-14-1991
An ignition coil for developing spark plug firing voltages. The magnetic current for the coil comprises an axially extending core that joins axially spaced annular parts. The core and parts can be formed of iron particles in a binder of electrical insulating material. A primary winding is disposed about...     
5047745 Laminations Sep-10-1991
Packs of laminations and a method of assembling the packs of laminations to make a core of an electromagnetic device such as a transformer or motor are described. First and second packs of complementary laminations (12, 14) are provided that fit relatively freely together and have interfitting formations...     
5053738 Magnetic leakage transformer Oct-1-1991
A magnetic leakage transformer includes a paired cores each having five straight legs extending in the same direction from a common back beam, and associated with each other so that the leg's ends are opposed to each other with magnetic gaps between the paired central legs and between the two paired...     
5083101 Integrated electromagnetic interference filter Jan-21-1992
An integrated electromagnetic interference filter includes an inductor assembly for attenuating both common mode and differential mode electromagnetic interference conducted emissions from electronic equipment. The inductor assembly includes an outer core of permeable material defining an outer window,...     
5117215 Inductive device May-26-1992
An improved inductive device has a U-shaped ferrite magnetic core with a base and a pair of parallel legs integrally extending from the opposite ends of the base. A straight ferrite magnetic core is disposed between the opposed core legs to define airgaps respectively between the ends of said straight...     
5140291 Inductive device Aug-18-1992
An inductive device comprises a soft magnetic core which consists of two E-shaped core halves (1), each of which comprises three parallel limbs (5, 7) which are interconnected by a yoke (9). The core halves (1) are arranged against one another by way of the free ends of the limbs (5, 7), a coil former...     
5146198 Segmented core inductor Sep-8-1992
A multiple phase inductor includes a magnetic core having two end pieces and a plurality of legs extending between the end pieces to form flux paths which pass through the end pieces and the legs. Each leg includes a stack of "I" shaped laminations which are positioned between the end pieces to form...     
5155676 Gapped/ungapped magnetic core Oct-13-1992
The novel magnetic core structure of this invention provides a combination of large differential type inductance and some common mode type inductance while accommodating common mode dc current in two parallel planar conductors such as bus bars or printed circuit lands. This combination of desirable functions...     
5166655 Shielded inductor Nov-24-1992
A shielded inductor is formed by winding a coil of wire around an axial leaded form, and disposing a magnetic shield around the axial leaded form and the coil of wire. In a preferred embodiment, the magnetic shield is epoxied to the coil of wire. In a further preferred embodiment, a premold is formed...     
5185688 Split core degaussing coil loop Feb-9-1993
A split core degaussing coil loop having a segmented and disassembled loop portion that is joined together to include an object to be demagnetized, in situ, as part of the assembled core loop and further having an inductor coil assembled with the loop that is selectively energized in one or more steps...     
5198790 Electrical transducer Mar-30-1993
A transducer is disclosed for detecting an electrical pulse from a circuit and for generating an output signal in response to each pulse. The transducer includes a first electric coil having two ends adapted for connection with the circuit and a second electric coil having two ends on which the output...     
5225971 Three coil bridge transformer Jul-6-1993
The magnetic core of the transformer is an E--E shaped core. The primary winding of the transformer is divided into three substantially identical planar coils, each coil being wound on one of the three separate core posts. The coils are wired in series such that a current in the primary winding will...     
5266916 Compact transformer Nov-30-1993
Here is disclosed a compact transformer comprising a plurality of core elements so combined to form a complete core defining two closed magnetic circuits, one of these magnetic circuits being provided with primary and secondary windings of a first coil and the other magnetic circuit being provided with...     
5315279 Coil device May-24-1994
The present invention provides a coil device including magnetic cores having gap regions and a coil wound to contain the gap regions. The present invention provides an improvement in which a shape of at least one of the opposing magnetic cores forming the gap regions is formed into a curve of logarithmic...     
5343184 Electric noise absorber Aug-30-1994
An electric noise absorber comprising at least two ferrite pieces having abutting planes, at least two case members containing the ferrite pieces respectively and being closed by means of engagement members, and a spring member provided in at least one of the case members for pressing the ferrite pieces...     
5353001 Hybrid integrated circuit planar transformer Oct-4-1994
A planar transformer includes a multilayer printed circuit board having a plurality of spiral windings formed by metalization on various surfaces of the printed circuit board. A ferrite core assembly includes first and second core sections disposed on opposite sides of the printed circuit board and completely...     
5371486 Transformer core Dec-6-1994
A transformer core includes a first core member formed by laminating grain oriented 3% silicon steel sheets and second core members disposed at respective sides of the first core member in the direction of lamination so that the first core member is sandwiched by the second core members. Each second...     
5373277 Signal discriminator Dec-13-1994
A signal discriminator comprising: a plurality of sets of dual divided magnetic cores having different characteristics; a case made of a synthetic resin having a hinge capable of opening and closing the case and a latch means, of which inner portion is divided into sections by a plurality of partition...     
5376912 Combined transformer and inductor Dec-27-1994
An apparatus is disclosed for a combined transformer and inductor for transmitting power between a source and a load. The apparatus comprises a transformer core and an inductor core which are magnetically independent from one another. A primary winding is wound about the transformer core and is electrically...     
5400005 Toroidal transformer with magnetic shunt Mar-21-1995
A transformer or inductor is made by wrapping a magnetic core material about a toroid-like structure made up of one or more electrical windings. A ferroresonant transformer may be constructed by including a slotted washer between primary and secondary windings. By shorting one of the windings, the ferroresonant...     
5414401 High-frequency, low-profile inductor May-9-1995
A multi-pole magnetic component, such as an inductor, includes z-folded conductive film windings and a core having a plurality of pairs of spaced apart core posts extending between a base plate and a top plate of the core. The core includes an air gap that is distributed substantially evenly along the...     
5418513 Transformer core in transformer circuit May-23-1995
A transformer core assembly in a transformer comprises a coil having a primary winding and a secondary winding which are successively wound about a hollow coil bobbin, in division, with respect to a longitudinal direction of the hollow coil bobbin, and a pair of E-type cores in which central core sections...     
5422620 Transformer Jun-6-1995
The so-called delta-phi transformer makes use of the effects of various core materials and air gap sections in the cores on the magnetization curves of core materials. It consists of at least two magnetically separated cores, designated source core SK and regulating core RK, which possess different magnetic...     
5486803 Signal discriminator Jan-23-1996
A signal discriminator which comprises a plurality of divided magnetic cores which surround a peripheral part of a cable when the plurality of divided magnetic cores are integrated. A resin case formed of a plurality of sections is capable of opening and closing and accommodates the plurality of divided...     
5521572 Unshielded air-coupled current transformer May-28-1996
An air-coupled current transformer is provided with a primary current conductor and two secondary coils connected such that the emf induced in each coil by an external disturbing magnetic flux is subtractive, whereas the emf induced by the current in the primary is additive. Two ferromagnetic core pieces...     
5525951 Choke coil Jun-11-1996
Two coils 3a, 3b are wound over adjacent portions of a first magnetic core having two closed magnetic circuits and a second magnetic core. The winding directions of the two coils are set so that the magnetomotive forces generated by both coils may cancel each other in the second magnetic core. The magnetic...     
5539369 Multiple-toroid induction device Jul-23-1996
An induction device has an elongated core made of two or more uniform ferromagnetic spaced-apart toroids. A first winding around the core creates an inductor. When the induction device includes a second winding, a transformer is created. The transformer acts as a powercord transformer when the exposed...     
5563778 Uninterruptible power supply system Oct-8-1996
An improved uninterruptible power supply system includes a converter for converting alternating current voltage into a direct current voltage; an inverter for modulating the direct current voltage outputted from a battery or the converter; a first switch for switching the voltage modulated at the inverter;...     
5583474 Planar magnetic element Dec-10-1996
Disclosed herein is a planar magnetic element comprising a substrate, a first magnetic layer arranged over the substrate, a first insulation layer arranged over the first magnetic layer, a planer coil formed of a conductor, having a plurality of turns, arranged over the first insulation layer and having...     
5587694 Reactor with core gap spacers Dec-24-1996
Two sets of a combination of an iron core formed of laminated strip-shaped electromagnetic steel plates and a coil are arranged in parallel, and these are abutted via core gap spacers against two iron cores formed of laminated trapezoidal electromagnetic steel plates, so that a square-shaped magnetic...     
5635890 Choke coil Jun-3-1997
A choke call includes a bobbin, a pair of windings wound around the bobbin, and two magnetic cores. The bobbin has a rectangular barrel in which a circular hole is defined. The two magnetic cores are partly inserted into the hole of the barrel. The hole is offset from the central axis of the barrel....     
5677661 Rotary transformer Oct-14-1997
A method for the manufacture of a rotary transformer in accordance with the present invention comprises the steps of forming two cylindrical stator ferrite blocks with the same inner diameter but different outer diameters and two cylindrical rotor ferrite blocks with different inner diameters but the...     
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