Abstract: There is disclosed an ignition coil for an engine including a terminal coupler formed integrally with a coil bobbon, a connecting terminal rotatably mounted in said terminal coupler, so that it is electrically connected to a terminal arranged in said terminal coupler and having a cut groove formed therein, said cut groove having a groove width which is slightly narrower at its inner side than that of a coil wire, and a holder for holding a terminal end of a coil pulled out of said coil bobbin, said holder being arranged on the side of said terminal coupler, in which said connecting terminal is rotated, whereby the terminal end of the coil held in the cut groove of said holder becomes positively gripped into the cut groove of said holder, to form an electrical connection between said connecting terminal and the terminal and of said coil.

Abstract: A ballast assembly for a fluorescent lighting fixture includes a magnetic core, a primary winding and a secondary winding, both windings mounted on a central leg of the core, with a shunt disposed between the windings to prevent a flux generated by the primary winding from coupling with a flux generated by the secondary winding. The ballast further includes means for securing the shunt comprising a wall placed between the windings, with the wall having one or more structures formed integrally on the wall for engaging the shunt. The wall may comprise a flange of a bobbin, or be free standing. Using formed structures eliminates the need for winding tape around the shunts to provide an air gap between the sunt and the core. This assures long-term stability and reduces the potential for nuisance humming.

Abstract: A three phase saturating reactor is constructed of thin E and I shaped laminations that are interleaved to minimize the effects of air gaps. The laminations include apertures that are in alignment and four identical frame members are secured thereto by means of insulated bolts that pass through the apertures in the core and corresponding holes in the frame members. The taps of the electrical phase coils that encircle the legs of the core are of heavy conductors that are self-supporting. The saturating reactor design is such that the core is driven into saturation at a small percentage of the rated current of the reactor to rapidly develop a back EMF when in a motor starting circuit.

Abstract: A noise suppression inductor including a bobbin having a spool divided into a plurality of spool portions, a core mounted on the bobbin, at least one coil wound around the spool portions into a plurality of coil portions and a plurality of terminal pins connected to opposite ends of the coil, in which the coil portions have different winding widths such that stray capacities produced at the coil portions are made different from each other, whereby the noise suppression inductor has a plurality of self-resonance frequencies.

Abstract: A surface-mounted-type inductance element comprising a coil structure having a bobbin; the bobbin including a portion around which wires are coiled, a pair of flanges integrally formed at opposing ends of the bobbin, a pair of bases integrally formed at lower edge portions of the flanges in a manner to project laterally from the flanges, and a plurality of external terminals attached to each of the bases in a manner to penetrate the base, each the external terminal including a first portion projecting laterally from the base and a second portion projecting downward from the base, around which first portion of each the external terminal a termination of any one of the wires is wound; a mold covering the coil structure in a manner to allow the second portions of the external terminals to be projected outward from the mold, the mold being formed of resin material exhibiting heat resistance; and a pair of cores assembled to the coil structure through the mold.

Abstract: A ballast assembly for a fluorescent lighting fixture has a magnetic core, a primary winding and a secondary winding, both windings mounted on a central leg of the core, with a shunt disposed between the windings to prevent a flux generated by the primary winding from coupling with the flux generated by the secondary winding. The ballast further includes a shunt retaining clip disposable between the windings, the clip including a essentially U-shaped wall having a pair of upright portions and a crossover portion, a bottom ledge attached to the crossover portion for accepting the shunt. A spring arm extends between the pair of upright wall portions of the U-shaped wall with the spring arm sized to resiliently engage a top surface of the central core leg.

Abstract: This amorphous steel core transformer comprises: (i) a coil subassembly having a coil window of generally rectangular cross-section bounded by two end faces and two side faces, at least one of the side faces being slightly concave, and (ii) a core having a leg that fits within the coil window and comprises superposed aligned strips of amorphous steel stacked in the direction of the leg thickness and between said side faces. Each strip has two edges and, disposed between the two edges, a width that approximates the distance between the end faces of the coil window. The strips are further characterized by a slightly greater thickness in their central region than in the region of their edges. The core leg has a thickness that is substantially less in both edge regions of the strips than in the central region of the strips, thus rendering the leg capable of fitting more tightly within said coil window.

Abstract: An electrical transformer assembly characterized by a tank having opposite sides and a top access opening with a transformer structure movable into and out of the tank through the opening, the transformer structure including a coil and core assembly mounted within a support frame which frame has a top surface on which transformer components are mounted whereby the assembly of the transformer structure and transformer components are movable into or from the tank intact.

Abstract: A transformer, choke or the like includes a magnetic core assembled from two lamination packets formed of laminations layered in a given direction. The lamination packets have outer contacting surfaces defining a partition line therebetween. A weld seam transverse to the given direction fastens the contacting surfaces to one another and overlaps the partition line. A fastening element fastens the transformer, choke or the like to a floor or a wall. Upright tabs formed on the fastening element have free edges alongside the partition line being partially welded with the weld seam.

Abstract: Coil-core assembly for a transformer including a plurality of coils and cores supported in a U-frame. The frame includes a cross member from whose ends legs extend. The cross member and the legs are channels. Near the corners of the frame the flanges of the channels are separated so that the legs are, in effect, hinged about the material remaining at the corners. Before the coils and cores are inserted in the frame, the legs are set at an angle of between 91.degree. and 93.degree. to the cross member so that the coils and cores may be readily positioned in the frame. On each side of each gap, spanning the gap, axially coextensive lugs are welded to the flanges. The coils and cores are disposed on the cross member between the legs.

Abstract: 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 the electric noise absorber to the cord or cable by simply closing and opening the case pieces.

Abstract: An iron core of a stationary induction apparatus such as a transformer has a plurality of steel sheets stacked in layers. Each corner of the core has a yoke member and a leg member abutting and jointed to each other at their obliquely cut ends in such a manner that the two members of alternating layers partially overlap each other over a predetermined overlapping region at each corner of the core. The surfaces of the members in the overlapping region are roughened by, for example, being provided with fine linear indentations and ridges.

Abstract: 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 the shunt-receiving compartment but which prevent the shunt from shifting from within the compartment or moving outwardly therefrom.

Abstract: A miniature high frequency power transformer comprises first and second "E" shaped ferrite core halves surrounding mating inner and outer modular transformer bobbins having formed thereon respectively the primary and secondary windings of the transformer. The inner and outer modular transformer bobbins are positioned such that the inner transformer bobbin is inserted into the outer transformer bobbin with the secondary windings surrounded by the primary windings. When assembled, the inner modular transformer bobbin has a protrusion that extends axially therefrom through the outer bobbin and terminates in first core retaining ears at one end of the transformer. Second core retaining ears extend from the opposite end of the transformer, and both ears receive the "E" shaped core halves, maintained in position on the transformer by bonding.

Abstract: A pair of identical covers house and insulate two split cores of the type used to submonitor current flow into a breaker box. The covers keep the cores in correct alignment and identify the proper orientation of a pick-up transformer that is coupled to the cores. The covers are molded from a non-conducting plastic and have an integral locking mechanism utilizing a living hinge. Integral spring tabs and integral alignment tabs hold the split cores securely next to one another. Arrow markings on the split covers are matched with an arrow marking on the pick-up transformer which is placed around the assembled covers to form a current sensing unit. The face of the current sensing unit with the arrows is directed towards the current source. Electric current can then be monitored using a digital watt/hour meter connected to the current sensing unit. The locking mechanism of the covers enables the current sensing unit to be easily removable for use at other locations.

Abstract: A transformer core and coil assembly comprising a core including first and second generally vertical, spaced-apart portions, first and second coils respectively wound around the first and second portions of the core, and a clamping structure including a generally horizontally upper member disposed above the core and the coils, a generally horizontal lower member disposed below the core and the coils, and a generally vertical end plate assembly which is disposed adjacent one of the coils, which extends between and is connected to the upper and lower members and which includes a vertically extending end plate having an upper end extending above the upper member, and the end plate assembly also including a vertically extending member having a U-shaped cross section and including a base portion parallel to and spaced from the end plate, and spaced, parallel leg portions extending from the base portion and connected to the end plate.

Abstract: The invention is in the field of electromagnetic transducers. The sensor according to the invention includes an electrical winding 2 mounted on a carcass 1 hollowed with a cavity 7 which receives a metal pole piece 5 and a permanent magnet 6. According to the invention inclined ribs 20 are formed in the cavity 7 in order to constitute a means of progressively locking the magnet by the wedge effect during the insertion of this magnet and of the pole piece into the cavity. It is thus possible to accurately adjust the distance d which separates the end 21 of the pole piece from a reference surface 22 of the carcass 1. Application to the production of a shaft speed sensor or a wheel speed sensor for a motor vehicle.

Abstract: A transformer support assembly for holding primary and secondary coils and a pair of U-shaped cores in operative relation, the assembly comprising first and second integrally-formed, one-piece bobbins, each bobbin including a post axially extending between opposed flanges spaced for windingly receiving one of the coils around the post, each bobbin having an axial bore through the post and flanges for receiving one leg of each held core in opposed relation, and an integrally-formed, one-piece separator including C-shaped channels for engaging corresponding flanges of both the bobbins to position the posts in generally parallel, spaced relation and opposed pairs of jaws adapted to grip base portions of held cores for biasing the legs thereof toward one another in axially opposed relation in said bores.

Abstract: A technique for assembling a transformer core from two separate core components uses a thermo shrinkable elastomer band or tubing in place of the more conventional glues and metallic clips to secure the component into a unitary structure. A thermo shrinkable mylar plastic tubing is placed around a periphery of a core formed by abutting two separate core components together so as to form a closed magnetic path. Application of heat shrinks the tubing and secures the two separate core components into one unitary core structure.

Abstract: This transformer comprises preformed coil structure and a wound core of closed-loop configuration extending about a window and having joints in a localized region thereof that allow the core to be opened at the joints to permit insertion into the window of the preformed coil structure. The core comprises superposed laminations of thin amorphous ferromagnetic strip material which extend around the core from the localized joint region. The laminations include predetermined portions adjacent the joints that are displaced to provide a wide opening into the core window for insertion of the coil structure. A coating of adhesive bonding agent applied before said displacement is present on the lateral edges of the laminations in regions of the core not including said predetermined portions, thereby holding the laminations in correct assembled relationship when the core is opened, yet without interfering with displacement of said predetermined portions.

Abstract: A noise suppression inductor including a bobbin having a spool divided into a plurality of spool portions, a core mounted on the bobbin, at least one coil wound around the spool portions into a plurality of coil portions and a plurality of terminal pins connected to opposite ends of the coil, in which at least one of the coil portions is composed of a first part having one or two winding layers and a second part having one winding layer and at least another one of the coil portions has not less than two winding layers.

Abstract: An ignition coil (1) for internal combustion engines comprises a magnetic core (4) of the core- of sleeve type, around the main core of which the primary and secondary winding being insulatingly enveloped with a cast material is arranged, the end regions of the main core being connected with each other via a magnetic path located outside the two windings, and having mounting members attached to the magnetic core (4) for mounting the ignition coil (1) to an automobile body. In order to bring the heating of the windings to an equal level and to reduce the heating of the windings, the mounting members are formed of a mounting plate (8) with mounting surface (9) and of at least one frame member (10, 11) integrally formed with the mounting plate (8) which envelopes the magnetic core (4) in a form-locking manner. The frame members (10, 11) can be expediently placed for mounting angularly on the ignition coil (1) and are pivotable in abutment with the surface of the magnetic core (4).

Abstract: A fixture for defining the window of a jointed magnetic core, which core is constructed of amorphous metal alloy, and methods of constructing such a fixture. The fixture includes first and second substantially U-shaped metallic frame members which are easily and quickly assembled with interlocking joints which positively maintain the desired geometric configuration of the core window, as well as the peripheral dimension thereof. Notwithstanding the high mechanical strength of the fixture, the interlocking joints are easily unlocked, which feature is necessary as the fixture will be required to be assembled, disassembled, and reassembled a part of the normal processing of the magnetic core. New and improved methods of constructing the fixture enable the same tooling to be used for different sizes of fixtures, which are required to cover the range of transformer ratings the magnetic cores will be an integral part of.

Abstract: A magnetic core containing amorphous metal, suitable for use with electrical inductive apparatus, such as transformers. The desired physical dimensions of the magnetic core are maintained, without adversely stressing the core, by a composite, conformal coating applied to the core edges. The composite coating includes a rigid high strength outer structure and a low stress, adhesive inner structure which cooperatively provide mechanical support and stress protection for the magnetic core, while maintaining its configuration.

Abstract: A transformer comprises a tank containing insulating liquid, and within the liquid there is an amorphous-alloy laminated core that comprises spaced-apart upper and lower yokes and two spaced-apart legs at opposite ends of the yokes. Coil structure surrounds the legs, locating the yokes outside the coil structure. Box-like enclosures primarily of electrical insulating material respectively enclose the yokes in positions outside the coil structure. The enclosure about the lower yoke is positioned to capture therein chips of amorphous alloy which might become detached from said core and fall toward the bottom of the tank.

Abstract: This transformer comprises a generally rectangular core having two yokes and two legs connecting the yokes, with joints located in one of the yokes. Coil structures surround the two legs. Flexible banding under tension applies clamping forces to two clamping plates spaced outwardly from the yokes, and these clamping forces are transmitted to the coil structures by paths bypassing the core. The banding extends alongside the legs and is oriented so as to engage the core at opposite ends of said one yoke but so as to be spaced from the core at opposite ends of the other yoke.

Abstract: An isolation transformer for connection between a source of alternating current power and electrical components, the operation of which components is affected by voltage excursions occasioned by electromagnetic pulses. The transformer includes a ferromagnetic core including first and second ends and at least two legs extending between the ends and defining therewith at least one window in the core. Also included are a primary coil surrounding a first portion of the core and extending through a window in the core, and a secondary coil, spaced from the primary, surrounding a second portion of the core and extending through a window in the core. A metallic isolation shield is positioned between the coils with the shield having core apertures for receiving components of the core so that the shield passes through each window of the core. A first metallic housing is mounted on the shield and has an opening for receiving the primary coil and the portion of the core on the primary coil side of the shield.

Abstract: In the present invention, there is disclosed an electrical induction apparatus having a magnetic core unit being comprised of a toroidal magnetic core and at least one winding wound around the core and a casing for housing the magnetic core unit therein, comprising a support plate for supporting the bottom of the magnetic core unit having at least one opening, means for positioning the unit at a predetermined position in the casing being engageable to the opening of the support plate, a cylindrical member made of an insulating material which is so formed as to fit into the central hole of the unit, a mounting plate for fixing the unit being disposed on the top of the unit, an axial member passing through the central hole of the cylindrical member, one end of which is connected to the supporting plate and the other end of which is projected outwardly in the axial direction thereof, a nut means for fastening the mounting plate to hold the unit between the mounting plate and the support plate which is engageable

Abstract: A transformer includes a preformed winding with each turn having a channel cross section. The individual units are joined to form the desired multiturn winding. Another winding is inserted within the channel cross section of the multiturn winding. In one embodiment, the channels of the two turns are joined to form a closed passageway. In another embodiment, they are nested one within each other to form a concurrent passageway.

Abstract: The improved structure of an inductor with an amorphous sheet core and a winding has been found. A core assembly has a pair of housing halves made of non-magnetic material with U-shaped track, in which a laminated amorphous sheet is mounted. The ends of the halves are inserted in a winding so that the ends of the cores abut with each other directly or through a gap spacer. The core halves are pressed by spring action to assemble the inductor. The core halves are produced by the steps of winding an amorphous sheet to a coil, inserting the coil in the track of the housing, and impregnating the coil with plastics.

Abstract: A transformer comprising an outer coil former (1) having a first outer end portion (13), to which is secured a resilient device (49) which exerts a force on a first core part (47) directed towards a second outer end portion (15) of the outer coil former. Within the outer coil former (1) is arranged an inner coil former (3) having a first inner end portion (25), which is received by a recess in the first outer end portion (13) in a manner such that the resilient device engages only the first outer end portion and the first core part (47) but does not engage the first inner end portion. As a result, the resilient device not only holds the first core part in position, but also prevents the two coil formers (1,3) from moving away from each other.

Abstract: A two-part cut sheet metal lamination element wherein one of the two sheet metal parts 1 comprises two outer legs 3 and a middle leg 4, the other sheet metal part 5 comprises a crosslink, the two outer legs of the first sheet metal part and the crosslink of the second sheet metal part are rigidly attached to each other, and the free end of the middle leg 4 interacts with the crosslink of the second sheet metal part by a short projection 10 which prevents movement of the free end of the middle leg with respect to the corresponding crosslink by an engagement produced when the two sheet metal parts are pressed together, said engagement and immobilization resulting from the punched or stamped configurations of the sheet metal parts.

Abstract: Electric coil including a coil form having means at respective ends thereof for carrying respective soldering lugs, respective magnetizable cores disposed on the coil form at the respective ends thereof, and springs formed with angled-off ends, the springs respectively engaging the magnetizable cores at the respective ends of the coil form, the carrying means and said angled-off ends of the springs, respectively, being formed with respective laterally extending projections and recesses snappable over the projections so as to urge the cores towards one another.

Abstract: An inductance element of the type that includes a coil bobbin having flanges at the ends thereof, a pair of pot cores engaging the bobbin, and a fastening member for fastening together the pot cores and bobbin. At least one of the bobbin flanges includes a joining part that extends outwardly from the bobbin flange and engages both the adjacent one of the pot cores and the fastening member to prevent relative rotation of the bobbin and adjacent pot core and fastening member. One of the bobbin flanges may include a stepped part having pins extending therefrom for making electrical connection to the inductance element. The stepped part is spaced from the bobbin flange, and connection wires may extend within the space.

Abstract: An inductive coupler system including a first part in which is defined a socket region and a second part including a plug member. A first frame member carrying a first magnetic half-core constituting one half of an inductive coupler is supported by the first part, while the second part carries a second magnetic half-core constituting the other half of the inductive coupler. The first part includes actuation means responsive to the insertion of said plug member in said socket region to move the first frame member towards the second part to a position where a mating surface of each of the half-cores are in surface-to-surface alignment with each other. Second actuation means drives the aligned mating surfaces into intimate contact or moves the first frame member away from the second part.

Abstract: A transformer with E-shaped and I-shaped magnetic cores which are respectively formed of a stack of E-shaped sheet laminations and a stack of I-shaped sheet laminations, includes sheet insulators to insulate coils from the magnetic core. Spacer members are formed from parts of the sheet insulator to hold the preferable distance between the coil and a central leg of the E-shaped magnetic core. The spacer members are each formed by folding parts of the sheet insulator.

Abstract: A three-phase choke, includes a five-leg core formed of a central core leg carrying a winding, two outer core legs each carrying a winding and two return legs, the central and outer core legs being formed of stacks of laminations, a lower yoke having ends adjacent the return legs, an upper yoke formed of sections having ends defining gaps between the ends of the sections and gaps between the return legs and the ends of the sections of the upper yoke adjacent thereto, and non-magnetic material filling the gaps, the yokes and return legs having cross sections being smaller than the cross sections of the core legs carrying a winding, each of the return legs and the ends of the yokes adjacent thereto having a first magnetic resistance, the upper yoke having a respective portion thereof disposed between the central core leg and each of the outer core legs each having a second magnetic resistance, and the lower yoke having a respective portion thereof disposed between the central core leg and each of the outer core

Abstract: Electric machine, such as a transformer, a choke or a constant-voltage regulator, having an iron core assemblable from a plurality of individual, substantially rectangular core parts, including legs and intermediate yoke parts, formed of mutually held-together laminate layers, and clamping means such as clamping straps or plates clampable into engagement with a corresponding clamping surface at outer contours of the leg core parts transversely to the laminate layers by clamping elements such as screws or rivets, includes means defining channel or tunnel-shaped recesses extending parallel to all of the mutually parallel laminate layers of all of the assemblable individual core parts and substantially perpendicularly to juxtaposed joint abutments of the respective individual core parts.

Abstract: A stepped iron core formed of sheetmetal laminations for a static or dynamic electric machine, such as a transformer, having yokes and legs and intermediate parts of at least one thereof including stacks of the sheetmetal laminations mutually held together forming individual steps of the yokes and the legs, the yoke stacks and the leg stacks being joinable with one another at respective abutment joint locations formed thereon, and means located at the respective abutment joint locations for achieving a varying magnetic reluctance therebetween so that a longer path of lines of force passes through the respective abutment joint locations in the region thereof of lower magnetic reluctance.

Abstract: The laminations of a stack that form an iron core for a magneto armature are provided with wart-like deformations produced by through-stamping, so that pressing the stack together will provide a press-fit at the locations of the deformations. The core is mounted by screws through mounting holes respectively in the yoke and at the end of one leg of an E-shaped core, while the press-fits produced by superposed deformations hold the rest of the core together against warping and twisting. Protuberances from the annular cup casing, which contains the winding mounted on the middle leg of the core, grasp the lamination stack in a region remote from the mounting holes to prevent the press-fit locking of the laminations from loosening.

Abstract: A laminated core for an ignition coil is made from E shaped and bar shaped laminated members. The E shaped member has equal length outer legs and a shorter center leg with oblique surfaces on the inner free ends of the outer legs. The bar shaped member has oblique surfaces at the ends thereof adapted to engage the oblique surfaces of the first member when the second member is oriented perpendicularly to the center leg of the first member and further to bend the outer legs of the first member outward to generate a restoring spring force as the second member is advanced toward the center leg to reduce the air gap. A coil assembled on the center leg is used to monitor a physical parameter indicative of a desired magnetic or electrical characteristic as the air gap is reduced and the members are fixed together when said characteristic is obtained.

Abstract: A flyback transformer has a primary coil on the bobbin and has fitting holders provided at both sides of a skirt formed integrally with a lower end of the primary coil bobbin. A U-shaped positioning fitting is provided at the center with a through bore and is fitted onto said skirt and fixed at both ends to the holders respectfully. A spring is fitted onto cores having legs inserted into the primary coil bobbin and abutting each other, and a grounding pin bent from the lower end of the spring is fitted into the bore of the positioning fitting. By this structure, the grounding pin is positioned properly with respect to the terminal pins for the primary winding with improved positioning accuracy, and insuring mounting of the grounding pin accurately on a printed substrate.

Abstract: Liquid-cooled transformer for large power ratings, including a tank having a bottom with cutouts formed therein, large-area base plates resting on the bottom of the tank, an active part having ends and a pressure device being fastened to the base plates, at least one of the base plates being disposed under one of the ends of the active part, the at least one base plate having outside corners being disposed above the cutouts formed in the tank bottom, stopping blocks positively locking the outside corners in position without play, and inserts supporting the stopping blocks and oil tightly closing off the cutouts.

Abstract: The invention relates to a device for tightening the core and the upper and lower cross pieces of a shunt inductance winding by means of a plurality of tie rods (5, 6, 7) which are preferably seven in number and which pass through the central hole of the core. A cup-shaped part (12) held by nuts (13) is fitted onto the tie rods, the outer wall of this part is threaded, a nut (14) is screwed onto this part (12) and bears against axially elastic washers (15).

Abstract: 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 core (13) so that the winding (2) rests in the groove 14. Those cores (10, 11, 13) are made of ferrite material. Thus, both the main winding and the control winding can be produced using a winding machine.

Abstract: In an electric stepping motor, a pair of core members are held in intimate contact within the coil by outwardly extending coil-engaging means on the core members being in interference fit with inner turns of wire of the coil. No supplementary fastening means such as adhesive, screws or the like are required to provide the coil/core assembly.

Abstract: Iron core for an electric machine such as a transformer, a choke, a voltage stabilizer and the like, assemblable of a plurality of individual parallelepipedal core parts formed of laminated layers mutually held together, the core parts having mutually abutting joints formed with smoothly finished surfaces free of any metallic connection between the individual layers, includes clamping means applicable to a clamping surface at outer contours of the core and extending transversely to the laminated layers, clamping elements for clamping the clamping means so as to hold the individual core parts together, the clamping means includes strap-like members for distributing clamping force at least approximately uniformly to the individual laminated layers between the clamping means and the respective clamping surface.

Abstract: Electrical inductive apparatus including a non-metallic band for containing a magnetic core of electrical steel plates. The non-metallic band includes one or more layers of non-metallic tapes or web belts that encircle a core limb and attach to themselves by a non-metallic fastening means. When multiple layers are utilized, each layer is fastened such that all layers are subject to uniform predetermined tension.

Abstract: A ferrite core type transformer, such as a flyback transformer used in a television receiver, includes a ferrite core unit and a coil unit mounted on the core unit. The ferrite core unit is constituted by a pair of U-shaped core members which are arranged to assume a figure "O" with a suitable spacer members held between each of the matching ends. A first bonding agent of quick hardening type is applied between the matching ends of the U-shaped core member, and a second bonding agent having resiliency is deposited in a contacting area between the core unit and the coil unit.

Abstract: 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.