Abstract: The invention relates to an inductive component that comprises a magnetic core (1), coil (6) and yoke (7, 10). According to the invention, the magnetic core (1) comprises a cylinder (2) that has been wound from wide strip material around a non-magnetic material (5) such as to obtain planar outer ends (8, 9). Two flanges (3, 4) are wound from two narrow strips at the outer ends (8, 9) of the cylinder. The coil (6) is wound around the centre part of the cylinder (2) between the flanges (3, 4). Finally, the yoke (7, 10) is wound from strip material around the magnet core (1).

Abstract: The invention relates to a planar transformer arrangement for an electric circuit located on a circuit board. The arrangement comprises (a) a first circuit board (PCB1) on which said electric circuit has been implemented, (b) a supplementary circuit board piece (PCB2), (c) a primary winding which comprises at least one substantially planar conductive pattern formed on a circuit board, (d) a secondary winding which comprises at least one substantially planar conductive pattern formed on a circuit board, and (e) a transformer core (F1, F2) which surrounds the primary and secondary windings at least partially. To create an inexpensive but efficient transformer structure suitable for use in an automatic manufacturing process, both the primary and the secondary windings have been formed on the supplementary circuit board piece (PCB2).

Abstract: A transformer comprising: a coil bobbin which includes a pair of core winding portions and a pair of coupling portions for coupling the core winding portions so as to space the core winding portions a predetermined distance from each other and is formed, on its whole outer periphery, with a groove; a winding which is obtained by winding a conductor around the groove of the coil bobbin a predetermined number of times; and a pair of wound cores each of which is obtained by winding an electromagnetic steel plate around each of the core winding portions of the coil bobbin a predetermined number of times; wherein an outer peripheral surface of each of opposite side walls of the groove at the core winding portions is curved so as to have an arcuate cross-sectional shape.

Abstract: A ballast stabilizer includes a stack of annular silicon steel plates defining a center through hole, a perforated bottom-open casing mounted within the center through hole of the stack of annular silicon steel plates, a winding holder mounted within the casing, the winding holder having a center open chamber, a peripheral wire groove, and a winding mounted in the peripheral wire groove around the winding holder, a stack of I-shaped silicon steel plates received in the open chamber of the winding holder, and a varnish coating covered over the stack of annular silicon steel plates and filled up the gaps in the casing, the winding holder and the stack of I-shaped silicon steel plates.

Abstract: An ignition coil having a transformer surrounding a cylindrical magnetic core. The transformer has a primary coil, to which a DC potential is applied in bursts and which generates a primary magnetic field, and a secondary coil, which retrieves induced electromotive force. An outer cylinder, surrounding the transformer, is also provided. At at least one end of the ignition coil at least one toroidal magnet is located. The inside and outside perimeters of the toroidal magnets have polarities which are opposite to each other. When a plurality of magnets is provided, they are nested inside one another between the magnetic core and the outer cylinder. The direction of the reverse biasing magnetic field generated by the magnet(s) is opposite to that of primary magnetic field generated by the primary coil. The foregoing construction provides a compact ignition coil which is efficient in operation and is capable of making effective use of the induced electromotive force generated.

Abstract: A degaussing coil designed to be mounted on the glass panels of cathode-ray tubes used to display color images wherein, the link between the ends of the winding of the degaussing coil and the conductors provides connection to the electrical supply circuit is encased in an insulating thermoplastic material. The degaussing coils is utilized for color television receivers.

Abstract: A wire-wound component to be mounted on a printed circuit board. The wire-wound component is formed by winding a wire on the body of the wire-wound component and by winding both end portions of the wire on terminals. The terminals and the body of the wire-wound component are formed as one unit by molding same from a heat-resistant resin material. The molded terminals, on which both end portions of the wire are wound, are inserted into the printed circuit board, and then connected to a circuit pattern on the printed circuit board by soldering.

Abstract: A device for electrically interconnecting the wire leads of various electronic elements within a microminiature package. A non-conducting base member having a plurality of electronic element barriers and wire lead through-holes is provided. The through-holes are generally located within the interior regions of the base element to minimize potentially detrimental field interactions or capacitive coupling between the leads and the external package terminals. During package assembly, the electronic elements are placed within recesses created within the base member by the aforementioned barriers. These recesses and barriers align the elements and help maintain electrical separation and uniformity during manufacturing. The wire leads from two or more elements are interconnected by twisting them together and inserting them into one of the through-holes.

Abstract: An inductance device comprises: an EE type ferrite core with an air gap at a center leg portion; a bobbin having at least three chambers wound by coils, said ferrite core being placed on said bobbin; and a shield coil formed by a first part and a second part of the coil, in which the first part is wound a chamber surrounding a peripheral portion of the air gap and the second part is wound the chamber in a reverse direction of the first part, the ends of the shield coil being short-circuited. In the inductance device with gap, the first and second parts of the coil are wound in the chamber surrounding the peripheral portion of the air gap in opposite direction each other, and the ends of the coil are shorted circuited. Thus, it is formed the shield coil for a leak magnetic flux from the air gap containing a component perpendicular to the main magnetic flux.

Abstract: An elastic molded insulating member such as rubber and elastomers is mounted at the end of an electrostatic shield ring attached to the end of a winding, or an electrostatic shield ring is made of an elastic material. The electrostatic shield is in tight contact with the winding, reliably improving the dielectric strength.

Abstract: A monolithic thick film inductor is made by printing alternating conductive layers and dielectric layers above one another, using the same dielectric printing screen and the same conductor printing screen for printing each of the dielectric layers and the conductive layers respectively. Each of the coil printing screen and the dielectric screen are indexed to n different positions in order to print each of the n layers. The resulting inductor includes a plurality of helical coil segments stacked above one another and electrically connected to one another to create the desired number of coil turns.

Abstract: The invention is directed to an ignition coil for an internal combustion engine which includes a columnar member having a plurality of magnetic plates, e.g., silicon steel plates stacked one on the other with stacked portions formed on the magnetic plates. The magnetic columnar member includes a first portion having a plurality of magnetic plates stacked one on the other in accordance with increase of a width of each plate, a second portion connected to the first portion and having a plurality of magnetic plates with the same width stacked stacked one on the other, and a third portion connected to the second portion and having a plurality of magnetic plates stacked one on the other in accordance with decrease of a width of each plate, thereby to form the columnar member with a middle portion thereof having a substantially circular cross section.

Abstract: An electromagnetic noise absorber has a pair of ferrite cores arranged with open ends of the ferrite cores facing each other. Each of the ferrite cores includes an axial portion, an outer cylindrical portion and a bottom portion and is constructed by coupling an end of the axial portion and an end of the outer cylindrical portion to the bottom portion. A slot is formed in the outer cylindrical portion and the bottom portion of each ferrite core such that the slot extends from the open end of the outer cylindrical portion to the bottom portion. The electromagnetic noise absorber can be easily attached to a signal line by placing the signal line in the slots and turning one of the ferrite cores. Since the signal line are wound around the axial portion of the ferrite cores, the signal line has a high impedance.

Abstract: There is provided a choke coil having a sufficient noise eliminating effect against common mode and normal mode noises. The choke coil has two bobbins, a pair of windings wound around the respective bobbins, first and second magnetic cores which are each inserted in cylindrical body portions of the bobbins at one side thereof, and a support member for supporting the cores. The first magnetic core is in the form of the character B and made of a material having lower permeability. The second magnetic core is in the form of the character D and made of a material having higher permeability. A predetermined gap is maintained between the cores by a spacer provided on the top surface of the support member.

Abstract: The object of the present invention is to provide a chip inductor structured for miniaturization, excellent mass-producibility and high reliability.A chip inductor of a sealed type having a square-shaped winding comprises a bobbin for winding, which has a square-shaped flange on its both ends, and a metal terminal sticking out from the outer side surface of each respective flange and each respective metal terminal being bent inside each respective flange upward so as to stick out to the upper side surface of the flange, also have the foregoing metal terminal further bent along the upper side surface of the flange, and further make insert-molding of the foregoing bent terminal possible to form the bobbin for winding.

Abstract: A coil support for accommodating at least one coil wire of an electromagnet, more particularly for use in electromagnetic valves, includes a hollow-cylinder-shaped support part having ends which are provided with stops defining the coil in its axial position. The support part has a step in its diameter which is limited on both sides by the coil wire with different winding layers and on which the coil wire is guided.

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: A process of producing a multi-layered printed-coil substrate as a planar magnetic component for use as a transformer or a choke in a switched mode power supply circuit, etc. in which several types of printed-coil substrates having individually different coil patterns are prepared, some of them are selected depending upon the desired characteristics of planar magnetic component, and the selected substrates are layered to obtain a multi-layered printed-coil substrate. A printed-coil component, wherein pin terminals erected on insulating bases are inserted through through-holes formed in the printed-coil substrate having patterned coils in a single or several layers and pin terminals are soldered to the through-holes.

Abstract: A coil bobbin comprises:a cylindrical body having a through hole in the center thereof; a separating flange formed on an outer surface of the cylindrical body between opposite ends thereof; a coil winding portion provided on one side of the separating flange in a longitudinal direction of the cylindrical body; a lead wire retaining portion provided on the other side of the separating flange in the longitudinal direction of the cylindrical body; a protector provided at the end of the lead wire retaining portion for protecting a lead wire to be placed in the lead wire retaining portion.

Abstract: A noise absorbing apparatus includes a pair of ferrite members and a pair of covers. The ferrite members are located to oppose each other in tight contact with each other to clamp a cable therebetween. The covers cover the ferrite members. The covers form opening portions through which the cable is inserted. The covers are integrally formed with cable clamping pieces partly projecting in a radially inward direction of the opening portions. Each of the cable clamping pieces has a direction of thickness which is aligned with the radial direction of the cable. The cable is clamped with an elastic deformation force of the cable clamping pieces in the direction of thickness.