Abstract: A chip inductance is composed of a wound coil core (1) that is arranged erect on a system carrier (6). Perpendicularly residing clips (7) are located on the system carrier, whereby the coil core (1) is arranged within the space formed by the clips. The terminals are thereby located essentially outside the space existing between the end face planes of the coil core (1).

Abstract: A magnetic core assembly and method of assembling a magnetic core assembly. The core assembly includes laminated magnetic core tightly clamped together by a pair of unitized flanged clamps. Each unitized flanged clamp has a generally flat surface and a peripheral flange. The generally flat surface defines at least one opening for receiving a coil and a number of holes adjacent the opening for receiving assembly hardware. The core is assembled by placing a first one of the two unitized flanged clamps, flange down on a generally horizontal work surface. Alignment pins are placed in one or more of the assembly hardware apertures adjacent the coil opening. The segments of the first core lamination are slidably placed on the alignment pins such that they lie on the flat surface of the first unitized flange clamp. The segments of each remaining core lamination are slidably placed on the alignment pins until the required number of laminations have been installed.

Abstract: Ballast for a discharge lamp, which can make a sustained power supply to the discharge lamp, and method and apparatus for manufacturing the same, are disclosed. The ballast having a core assembly (4) with one pair of stacks of a plurality of cores (3) symmetrically inserted into a bobbin (2) wound with copper wire (1), and the ballast including one retainer (9) for surrounding and fixing the entire core assembly (4).

Abstract: A quiet transformer includes a laminated core having each laminate formed as a flat layer from highly grain oriented silicon steel which is fabricated by laser cutting techniques with each layer including five segments in intimate contact with each other via mitered butt lap joints having increased length and asymmetrical angles at opposite ends for reducing the reluctance of the gaps between adjacent lamination segments. The center segment has V joints of different angles on opposite ends. Clamping holes formed in the element of said lamination having the largest cross section at the location in the segment away from said gaps to prevent magnetic flux crowding and increased local flux density. Indexing pins on opposite faces of the segments close and lock in the gaps of the core with each layer being 100% interleaved for producing low joint reluctance and to minimize magnetostrictive forces. The core is pressurized by clamping brackets and bolts connected to opposite ends of the core.

Abstract: An amorphous transformer prevents deformation or deflection caused by the repulsion force between an outer coil and an inner coil and prevents formation of a one-turn-current through a reinforcement member and a coil frame. The amorphous transformer includes amorphous cores, an outer coil and an inner coil, a coil frame and a reinforcement member. The reinforcement member prevents the amorphous core from being deformed inward by the electromagnetic force of the coil, and the frame member and the reinforcement member prevents formation of an electrical closed-loop. Accordingly, the amorphous transformer core is protected from being damaged.

Abstract: A blind hole pot core transformer comprised of a base member having a toroidal channel with a central post and a cover member also having a toroidal channel with a central post. A bobbin winding is positioned within a cavity defined by the toroidal channels of the base and cover members with a core comprised of the central posts of the base and cover member positioned within an opening in the bobbin winding. A compressible alignment member is positioned within an opening formed on outer mating surfaces of the central posts of both the base and cover members to retain the base and cover members in a desired orientation with respect to each other. The compressible alignment member has a cross-sectional area that is greater than the openings in the base and cover members so that any gap between the alignment member and the inner walls of at least one of the openings is eliminated thereby facilitating alignment between the central posts comprising the core of the device.

Abstract: 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 path is formed. Two outside iron cores of the four iron cores are coupled and fixed with metal fittings. With such an arrangement, the coil is divided into two, with increased surface areas of the coils and therefore an improved cooling characteristic. Further, since the electromagnetic steel plates used for the iron cores can be formed into simple shapes, electromagnetic steel plates of various sizes can be easily manufactured, so that iron cores of optimum dimensions can be provided, optionally depending on the type of the reactor.

Abstract: An arrangement for attaching electrical inductive components to a terminal block of a mounting base utilizes interlocking male and female plug-in connections. In instances where the electrical inductive components are measuring transformers, the arrangement accommodates higher electric currents in the area of several amperes seen in the primary winding because a galvanic connection is established simultaneously when the mechanical connection is made. Accordingly, the wiring of the primary circuit is made rapidly and without the possibility of faulty coupling. As the number of electrical inductive components increases, the arrangement disclosed provides compact construction.

Abstract: A transformer with laminated sheet cores consists of a coil bobbin having a core hole, and a plurality of laminated sheet cores, each having a middle leg inserted into the core hole and a fixing member such as a cover fixed to the coil bobbin, receiving the ends of the sheet cores so as to prevent the sheet cores from being removed from the cover. The laminated sheet cores are fixed to the core bobbin without being pressed in the direction of their total thickness and without lowering the core characteristic. The transformer has a smaller number of the cores and can be manufactured at smaller processes.

Abstract: A method of assembling a three phase current transformer for printed circuit board installation. Three current transformers, each having a spin wound coil positioned about one leg of an unassembled continuous lamination core, are placed side-by-side in a transformer carrier such that two parallel core legs of the center transformer overlap the adjacent core legs of the two outside transformers and further such that printed circuit board terminal pins attached to the coils pass through stand-off sleeves formed from the transformer carrier. Rivets are placed through holes in the laminations of the overlapped core legs and in the transformer carrier thereby simultaneously riveting the three transformer cores and the transformer carrier together making a three phase transformer assembly.

Abstract: A quiet transformer includes a laminated core having each laminate formed as a flat layer from highly grain oriented silicon steel which is fabricated by laser cutting techniques with each layer including five segments in intimate contact with each other via mitered butt lap joints having increased length and asymmetrical angles at opposite ends for reducing the reluctance of the gaps between adjacent lamination segments. The center segment has V joints of different angles on opposite ends. Clamping holes formed in the element of said lamination having the largest cross section at the location in the segment away from said gaps to prevent magnetic flux crowding and increased local flux density. Indexing pins on opposite faces of the segments close and lock in the gaps of the core with each layer being 100% interleaved for producing low joint reluctance and to minimize magnetostrictive forces. The core is pressurized by clamping brackets and bolts connected to opposite ends of the core.

Abstract: A noise suppressor for engagement over a cable or ribbon, has a pair of ferrite core halves held in a pair of case halves which are closed around the cable or ribbon. The noise suppressor has a pair of case portions made of resilient material, each case portion having opposite side walls and a floor for defining a space with an open top for receiving a ferrite portion, and ends for passing the conductor. Hinges and latches or latches only hold the case portions together in a closed position around a conductor with the open tops of the case portions facing each other. Ferrite portions are in each case portion, each ferrite portion having a channel and at least one face. The faces engage each other and the channels merging when the case portions are in the closed position for passage of the conductor through the channel. A raised platform on the floor of each case portion is made as one piece with the case portion and extends into the space and into engagement of the ferrite portion.

Abstract: In one embodiment of the present invention, an inductor comprises a core defining a first electromagnetic path, a second electromagnetic path and a third electromagnetic path, the third electromagnetic path substantially closing the first and second electromagnetic paths. The inductor also includes a first electrical coil wound about at least a portion of the first electromagnetic path and a second electrical coil wound about at least a portion of the second electromagnetic path. Another embodiment of the present invention uses the inductor in an electrical system such as a DC-to-DC converter. Inductors constructed according to the present invention can be used to provide "common mode" inductance and "differential mode" inductance in a single inductor.

Abstract: A transformer assembly, particularly for data and audio signals, has first and second bobbins which are telescoped within one another. An assembly cap is fitted around the bobbins and includes flanges for locating a core. The bobbins and the cap are designed such that creepage and clearance requirements are met. The core is preformed or comprises laminations formed as E's and I's, which are then fitted through the assembly cap and the bobbins. The cap provides a receptacle for the core, and retains the laminations in position. To secure the laminations in position, an assembly cup is mounted around the outside of the laminations. The assembly cup can include springs or the like, to maintain the laminations in position and allow for expansion and contraction. The springs can additionally mechanically secure the transformer in position. The bobbins, cap, core and cup can be encapsulated together.

Abstract: A combined terminal block mount and lamination stack keeper has a metal keeper with a flat first portion of a size and shape to lie contiguous to and oriented with a stack of laminations. A part of the stack of laminations is adapted to receive an inductance coil, and the coil is adjacent a part of the keeper first portion. There is a bend in the keeper to establish a unitary mounting strip out of the plane of the keeper first portion, and the mounting strip has a width and thickness to mount a terminal block thereon. The foregoing Abstract is merely a resume of general applications, it is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: For the production of a plate packet for magnet cores that have an opening in the longitudinal direction of the plate lamellae, inner plate lamellae with reduced cross-section are stacked in the region of the opening. Of these inner lamellae, at least two lie in one plate plane and together have a surface that is reduced in size by the cross-section of the opening in comparison to the size of the outer plate lamellae.

Abstract: A transformer core-coil frame attachment and ground. The core-coil is mounted on a metal frame with flanges extending along the bottom of the frame. Nonconductive support members in the form of channels are mounted on the flanges of the cross member to support the coil to relieve stresses and reduce the no-load electrical losses. The nonconductive support members have a profile shaped for ease in receiving and retaining the support members on the flanges of the cross member. The frame has an opening in the bottom for receiving a mounting boss protruding above the tank bottom of the transformer to locate the core-coil within the tank and resist movement of the core-coil within the tank in a horizontal plane. A compressible grounding structure is attached to the bottom of the core which allows for variation between the core and frame.

Abstract: A method of making a repairable transformer having an amorphous metal core. The three uncut legs of an annealed wound amorphous metal core are covered with an adhesive material while leaving the cut leg and both adjoining radii covered, but not bonded. The core joint is opened and coils are placed over the legs that adjoin the cut leg. The core joint is closed and the edges of the joint and both adjoining radii are covered with an inner layer of porous material which is secured by an outer wrap of electrical grade steel. The resulting transformer can be easily repaired by unwrapping away the porous material that covers the cut leg and the adjoining radii, opening the core joint, replacing a defective coil or core, reclosing the core joint, and rewrapping the porous material and reclosing the outer layer of electrical grade steel.

Abstract: An electromagnetic power supplying apparatus for an electric motor vehicle includes a removable primary core and a secondary core. The primary core with a primary coil wound therearound is formed in the shape of a pillar having a reduced height. The secondary core with a secondary coil wound therearound is disposed on a vehicle body and has a cross-section formed in a letter "O" shape surrounding the primary core. When positioning the primary core within the secondary core, i.e., when fitting the primary core into the secondary core, there is formed a tripod type closed magnetic circuit core. The primary core is formed with only the center leg member of the tripod type closed magnetic circuit core, and accordingly it is remarkably light in weight relative to the secondary core. Further, when the secondary core is provided with a guide surface flush with one of the magnetic flux in-out end surfaces of the primary core, the primary and secondary cores are protected from breaking during the positioning.

Abstract: The device comprises a winding support (1) which is made of an electrically insulating material and which comprises a coil former (3), provided with a through-opening (9), and a core of a soft magnetic material which consists of two parts (15) and which comprises a limb (19) projecting through the opening of the coil former and a yoke (17) at least partly enclosing the winding support. The two core parts are attached to one another by means of a clamping bracket (21) which is made of a resilient material and which is formed as a closed ring. The construction of the clamping bracket (21) is very inexpensive and it can be very simply mounted on the assembly formed by the core (15) and the winding support (1) in that the clamping bracket consists of one piece of a resilient material which is shaped as a strip comprising barb-shaped free ends (23), which strip is bent so as to form a ring, the facing free ends engaging one another so that the ring is closed.

Abstract: 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 path is formed. Two outside iron cores of the four iron cores are coupled and fixed with metal fittings. With such an arrangement, the coil is divided into two, with increased surface areas of the coils and therefore an improved cooling characteristic. Further, since the electromagnetic steel plates used for the iron cores can be formed into simple shapes, electromagnetic steel plates of various sizes can be easily manufactured, so that iron cores of optimum dimensions can be provided, optionally depending on the type of the reactor.

Abstract: An inductive electric component, in particular an electric transformer, includes a coil body having coil body flanges defining a winding space, and contact pin strips integrally formed onto the coil body flanges, the contact pin strips having extensions and having free ends with undercuts formed therein being limited outwardly by the extensions. A two-part magnet core has halves with center bosses to be pushed together on the coil body with the center bosses engaging the coil body and resting on the coil body flanges and on the contact pin strips. A spring cap is to be slipped onto the magnet core disposed on the coil body for retaining the magnet core halves on the coil body. The cap has a yoke with a middle region. The yoke is concave at least in the middle region, and the yoke has legs on two opposite sides and spring hoops on two other opposite sides. The legs each have detent protrusions locking into the undercuts with the spring cap slipped on.

Abstract: A mini-transformer features an iron or ferrite core (2) and primary and secondary windings (3, 4). Portions of the windings (3, 4) which extend beyond the iron or ferrite core (2) are covered on both sides with a thermoplastic material forming a lid (6, 7). The two lids or end bells (6, 7) are combined into one piece by means of first bars (12), which extend through the hollow spaces (9) between the windings (3, 4) and the iron or ferrite core (2) and fill them, and that the laminated iron or ferrite core (2) is fixed in itself by second bars (14) connecting the two lids (6, 7).

Abstract: An easy to assemble transformer for use in an electronics module of an electric vehicle. The transformer can be assembled from the "top down," thus alleviating the need to build the transformer as a subassembly unit. During manufacture of the transformer, windings are wound onto a thermally conductive coil form. Next upper and lower E-shaped core members are inserted into openings in the top and bottom of the form so that the side legs and the center legs of the E's touch and are in alignment. The thermally conductive coil form has a portion that touches a cold plate when the transformer is mounted on the cold plate. The transformer is further secured to the cold plate by a mounting bracket.

Abstract: A coin accepting apparatus. The apparatus includes a pair of generally parallel, spaced-apart plates. The plates define a coin track for receiving and guiding coins wherein each plate has a side facing the coin track and an opposing side facing away from the coin track. The apparatus further includes a sensor on the opposing side of one plate for detecting a characteristic of coins to be validated and first and second retainers on the opposing side of the plate for inhibiting movement of the sensor. The first retainer includes a spring arm for engaging the sensor and biasing the sensor against the opposing side of the plate. The second retainer engages the sensor and constrains movement of the sensor along an axis generally perpendicular to the opposing side of the plate.

Abstract: A clamping frame for a transformer core has a clamping frame part and a tensioner. The surfaces of the tensioner and of the clamping frame part abutting the transformer core lie in a common plane. The tensioner features an engagement part, which engages in a recess of the clamping frame part.

Abstract: A current sensor having a single-turn primary coil where the secondary coil is wound on a straight core that is bent so that diametrically opposed ends are electrically, mechanically and magnetically connected to form the primary coil.

Abstract: A current transformer comprising a primary conductor means 20, secondary conductor means in the form of a first and second coil 21, 22 connected to ensure common-mode rejection of emf induced by external disturbing magnetic fields, and magnetic coupling means defined by first and second magnetic plates 23, 24 and first and second ferrite elements 25, 26 arranged within the first and second coils 21, 22, the elements 25, 26 contacting and physically separating the first and second plates 23, 24, thereby defining a closed magnetic circuit with the plates.

Abstract: A very small and thin transformer to be used as incorporated in an electronic device for the civil life. In this transformer, a coil is wound on a coil bobbin in which core sheets are incorporated as laminated. This laminated core is provided with an insulating cover for insulation. However, when a gap is produced between the core sheets, an adverse influence will be produced on the electric characteristics of the transformer. Therefore, in case the insulating cover is applied to cover the laminated core, the insulating cover having a resiliency will press the core sheets in the laminating direction to prevent a gap from being produced between the core laminations.

Abstract: A dry type transformer has an iron core, high voltage windings embedded in cast resin, and low voltage windings resin encapsulated. The iron core is manufactured with stacked core steel. After the core is stacked, instead of using banding straps, a heat shrinkable material is wrapped around the core legs and is heated to enable the shrunken material to apply uniform compression over the core legs. This will facilitate coil loading, reduces audible core noise and reduce core losses. In place of shrink wrappable material, a film material with elastic properties could be used.

Abstract: This transformer core and coil assembly comprises (a) a low voltage coil surrounding a coil window and including first and second coil legs on opposite sides of the coil window, (b) a first plurality of side-by-side amorphous-steel core loops surrounding one of the coil legs, and (c) a second plurality of side-by-side amorphous-steel core loops surrounding the other of the coil legs. Extending between said coil legs in a position between two of said side-by-side core loops in the first plurality and between two of said side-by-side loops in the second plurality is a brace of plate form and of electrical insulating material for blocking motion of said coil legs toward each other in response to coil-collapsing forces developed by short-circuit currents through the low voltage coil, thereby protecting the amorphous-steel core loops from damage by these short-circuit produced forces tending to collapse the coil.

Abstract: A transformer or power supply apparatus as well as a method for making the same is provided. A coil assembly, including a bobbin (10 or 62), windings (30, 31), and terminals (27), retains core laminations (14) forming a transformer or power supply assembly. The assembly is placed within injection molding molds and a thermoplastic or thermosetting material is injection molded to partially or fully encapsulate the assembly, producing an improved transformer or power supply structure.

Abstract: A stator core for an electromagnetic pump includes a plurality of circumferentially adjoining groups of flat laminations disposed about a common centerline axis and collectively defining a central bore and a discontinuous outer perimeter, with adjacent groups diverging radially outwardly to form V-shaped gaps. An annular band surrounds the groups and is predeterminedly tensioned to clamp together the laminations, and has a predetermined flexibility in a radial direction to form substantially straight bridge sections between the adjacent groups.

Abstract: An electrical assembly including a coil assembly disposed around the central cross bar of a generally rectangular figure eight laminated core structure (10, 12) includes an upper clamp (14) that snaps into a lower clamp (16), the clamps provided with flanges (18-23) which completely cover the core (12), the clamps (14, 16) being snapped together and held in place by staked tabs (40) engaging slots (39). Mounting feet (29) and tabs to receive fasteners of auxiliary assemblies (33) are provided.

Abstract: A combination of a fastener with an electronic component, wherein the electronic component includes a bobbin having an axial portion, windings around the axial portion of the bobbin, external terminals projecting from the bobbin, around each of which external terminals a termination of one of the windings is coiled, a mold covering the bobbin in a manner to allow portions of the external terminals to be projected outwardly from the mold, the mold being formed of electrically insulating resin material, and a pair of cores assembled to the mold so as to be opposed to each other. The fastener fitted on the electronic component includes a first engaging member engaged in assembly with the cores to clamp the cores, a second engaging member engaged in assembly with a portion of the mold, and an interconnecting member interconnecting the first and second engaging members.

Abstract: An electrical noise absorber comprising a magnetic body like ferrite attached around a flat cable and a fixing member. The fixing member comprises an inserting portion having a through hole for passing the magnetic body therethrough. Opposite walls defining the through hole extend in the direction, in which the magnetic body is inserted, to form a pair of cable fixing arms. Each of the cable fixing arms has a slot and projections for engaging the side edges of the flat cable. Engaging portions for engaging the periphery of the magnetic body inserted into the fixing members are provided on the top and bottom of the inserting portion. The flat cable and the magnetic body can thus be held immobile by the fixing members of the electrical noise absorber.

Abstract: A line filter assembly adapted to be inserted in an electrical power supply circuit of various electronic appliances for avoiding an invasion and leakage of noise include first and second core members each having a pair of opposite arms connected together through a common bridge. Coils are formed on the arms of each of the core members in such a manner that directions of magnetic fluxes produced in the closed magnetic circuit as a result of flow of line currents counteract while the same coils are so arranged that the magnetic fluxes produced in the closed magnetic circuit as a result of the flow of the line currents are oriented in the same direction.

Abstract: An electromagnetic induction device which comprises a split-type core assembly comprising at least one winding formed thereon and first and second core segments each having at least two joint faces spaced apart from each other, the first and second core segments are connected together with the joint faces of one of the first and second core segments held in contact with the joint faces of the other of the first and second core segments, and a finely divided ferromagnetic material is interposed between the joint faces of the respective first and second core segments. The ferromagnetic material used has an average particle size sufficient to form a magnetic fluid medium.

Abstract: 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 signal is generated. The coils are coaxially wound together and a rod constructed of a ferromagnetic material is positioned through the rod. A housing also constructed of a ferromagnetic material includes two spaced end portions which contact the opposite ends of the rod. The housing also includes locking tabs which engage and lock the housing to opposite ends of the rod.

Abstract: A cradle or sling of banding strap material supports a wound magnetic core from an upper fixed support to at least partly relieve the weight of the core on the transformer winding and to permit the core to assume a more relaxed shape to reduce its internal stress and thus AW and TW core losses.

Abstract: 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 from a source of electrical power which generates a demagnetizing force directed to the object.

Abstract: A method of manufacturing a core for an electrical inductive device. A blind hole is provided through a stack of laminations into which an oil or an epoxy resin adhesive is placed. The blind hole provides a slow release for the oil to the outer surfaces. This obviates the contamination of the outer surfaces of the coil during manufacture as in the case with a dipping procedure. When the epoxy resin adhesive is employed in the blind hole, a wicking action takes place for better fastening of the laminations together. In another embodiment of the fastening feature, epoxy resin adhesive is molded to the outside of the end piece laminations as well as through a passage in the laminations. An improved resulting core is also provided.

Abstract: A line filter assembly adapted to be inserted in an electrical power supply circuit of various electronic appliances for avoiding an invasion and leakage of noise includes first and second core members each having a pair of opposite arms connected together through a common bridge. Coils are formed on the arms of each of the core members in such a manner that directions of magnetic fluxes produced in the closed magnetic circuit as a result of flow of line currents counteract while the same coils are so arranged that the magnetic fluxes produced in the closed magnetic circuit as a result of the flow of the line currents are oriented in the same direction.

Abstract: Disclosed is a retaining band for the magnetic core loop of an electrical transformer. The retaining band includes a locking mechanism to hold it in place around the core. The locking is accomplished by overlapping the ends of the band, cutting a pair of incisions in the overlapping region which extend from the sides of the band inwardly, and then bending the resulting tab(s) inwardly. If desired, the tabs can be spot welded to provide added locking force.

Abstract: Current transformer mounting mechanism which mounts a current transformer having a core on a circuit breaker to diminish impact caused by switching operation comprising: at least one substantially U-shaped fitting board having curved portions at both ends thereof; at least one setscrew for mounting said fitting board to the core of the current transformer; and a current transformer mounting portion having opposing walls, each wall being provided with a shoulder where the fitting board being fixed; the current transformer being mounted to the current transformer mounting portion by inserting the fitting board to the current transformer mounting portion. The fitting board is preferably provided with embossed tabs at curved portions thereof.

Abstract: Disclosed is a retaining band for the magnetic core loop of an electrical transformer. The retaining band includes a locking mechanism to hold it in place around the core. The locking is accomplished by overlapping the ends of the band, cutting a pair of incisions in the overlapping region which extend from the sides of the band inwardly, and then bending the resulting tab(s) inwardly. If desired, the tabs can be spot welded to provide added locking force.

Abstract: A core securing clip to hold the two core members of the core of a surface mount magnetic component together is designed with a large planar surface to provide a suitable surface to facilitate the use of pick and place apparatus in mounting the magnetic component on a printed circuit board. The subject clip is fastened over the top of the magnetic component and has spring loaded members that apply forces to opposing sides of the two core members joined together in order to join them together as a single core.

Abstract: A stationary induction electric apparatus and a method for manufacturing the apparatus is disclosed. The apparatus comprises a reinforcement frame to be mounted on an inner peripheral surface of a rectangular core, a protective cover for covering both of the rectangular core and the reinforcement frame, a reinforcement band to be wound on an outer peripheral surface of the rectangular core on which the protective cover is mounted, and windings to be fitted on the leg portion of the rectangular core on which the reinforcement frame, the protective cover, and the reinforcement band are mounted.

Abstract: A common-mode choking coil comprises a closed magnetic path core which is formed, for example, by combining two U-shaped cores. Two coils wound in opposite respective directions are mounted on two legs of the closed magnetic path core. These coils are formed by single-layer winding. That is a conductor wire is wound in only one layer, for example, around a bobbin. Then, the bobbins whereon the conductor wire is wound are mounted on the two legs of the closed magnetic path core. For the conductor wire used for the coil, a material having a spring property may be used. Utilizing this spring property of the coil, the closed magnetic path core can be held together by the coil, whereby the two U-shaped cores can be combined. Also, the two coils are identified by colors according to the winding direction of the respective conductor wires.

Abstract: A mounting device for mechanically retaining separable transfomer core portions together and attaching the transformer assembly to a printed circuit board utilizing a flat clip body and a vertically aligned spring unit to minimize the transformer assembly height and four mounting legs to allow easy installation and removal.