Abstract: A measurement pickup comprising a housing having a side opening, a measuring element located in the housing, a connection cable extending through the side opening and connected with the measuring element, and a closing part located in the side opening closing the side opening and fixing the connection cable at least in one direction and a body of plastic material injected into the housing for sealing the measuring element.

Abstract: A process for manufacturing a polymeric encapsulated "E" core transformer, a polymeric encapsulated "C" core transformer, and a polymeric encapsulated toroidal shaped transformer, said process requiring considerably less time to complete than do conventional transformer manufacturing processes.

Abstract: An encased transformer that comprises a bobbin including a plastic-molded cylindrical portion and upper and lower collars formed respectively at upper and lower ends of the cylindrical portion, a magnetic element extending centrally through the cylindrical portion, primary and secondary coils wound round the outer periphery of the cylindrical portion, comb-shaped metals terminal formed on the pair of lower collars by insert molding, the comb-shaped portion of each metal terminal being bent at generally right angles, the metal terminals being further bent at right angles and outwardly horizontally at an end portion thereof so that the metal terminal is substantially Z-shaped, a straight portion of the metal terminal positioned midways of the Z-shaped being fixedly held in position between the inner wall of a case and a frame wall having recessed terminal grooves into which are individually fitted metal terminals provided in a plastic square bottom plate.

Abstract: An inductance coil which is completed by casting resin around the body comprising a bobbin wound with a coil and a couple of U-shaped cores inserted in a center hole of the bobbin with the end faces adherent to each other to form a closed-loop magnetic path. The couple of cores are coated with mold releasing agent to assure the adhesion of the end face.

Abstract: An electronic device having a plurality of leads comprises a three dimensional electronic element holder of a non-conducting material having at least one cavity therein and a plurality of lead slots extending from the cavity to a base of the holder, an electronic element mounted in the cavity and having a plurality of leads extending therefrom, a plurality of the leads extending within the slots from the element to the base, and a plurality of lead terminals mounted on the holder and each having one end extending into one of the slots into conducting engagement with a lead and a free end extending outward therefrom.

Abstract: An ignition coil has a high tension winding divided into sections, each of which is wound in one of a plurality of winding compartments formed in an insulating body and which are spaced apart from each other by insulating compartments. The various sections of the high tension winding are connected in series using the wire of which the winding itself. The high tension sub-assembly is encapsulated in an insulating envelope. The high tension or secondary sub-assembly is impregnated with an adhesive varnish before being encapsulated in a plastics material, the encapsulation being carried out by surface moulding.

Abstract: The invention concerns an electronic module for a small portable object such as a card or a key incorporating an integrated circuit, and a method of mass producing such modules. The electronic module according to the invention includes a substrate (24) of insulating material, an integrated circuit chip (8) having at least two connector lugs (10) and which is fixed at least indirectly to the substrate, a coil (12) also fixed on the substrate and serving to provide an inductive coupling between the module and an apparatus with which the portable object is designed to cooperate, and electrical connections (18,20) respectively between the chip's connector lugs and the terminals (17) of the coil. In this module, the coil is an annular coil which surrounds a space in which the chip and the electrical connections are fully housed in a hardened, electrically insulating adhesive material (28) filling the space.

Abstract: A bobbin case for use in a transformer of the double-insulated type comprises an insulating member of tube-like shape, a partition wall disposed substantially normal to the axis of the insulating member so that the inner space of said insulating member is divided into two recesses for receiving primary and secondary winding assemblies, respectively, from the opposite directions along the axis of said insulating member, and a pair of insulating rims which extend from the outer end surfaces of the insulating member at the side of the recess for receiving the primary winding assembly. The pair of insulating rims are formed such that they are capable of being bent inwardly along the outer end surfaces so as to obtain a creeping distance between said primary winding and a core inserted into center holes in said winding assemblies. By using the bobbin case, the insertion of the primary and secondary winding assemblies can easily and efficiently be carried out.

Abstract: The invention relates to an ignition coil for use in an ignition apparatus of an internal combustion engine. For the purpose of miniaturization of the apparatus, a high voltage terminal (13) is integrally constructed by insertion molding the high voltage terminal to a bobbin (11) of a secondary coil portion (10). One end of a secondary winding (12) in the secondary coil portion (10) is soldered and connected to a connecting portion (13a) of the high voltage terminal (13). A projecting portion (11b) of the bobbin (11) is inserted into an engaging portion (14b) of a casing (14). Soldering of the high voltage terminal (13) and secondary winding (12) in the casing (14) is thus unnecessary, allowing the casing (14) to be miniaturized.

Abstract: A method for making a coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the method comprising providing a frame of non-metallic material, the frame having an aperture therethrough for the passage of material undergoing inspection, winding coils of electrically conductive strands on the frame, applying a first plastic coating in liquid form to the frame and coils, less the aperture portion of the frame, applying metal in fluid form to the first plastic coating to encase the first plastic coating in a metal layer, and applying a second plastic coating in liquid form to the metal layer to encase the metal layer in a second plastic coating.

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: An ignition coil assembly for internal combustion engine has a voltage withstanding air gap of a predetermined shape and an insulating resin cover for covering the external iron core provided in addition to resin mold and partitioning wall in order to electrically insulate from the secondary coil the external iron core constituting a magnetic path together with the internal iron core.

Abstract: There is disclosed an ignition coil for an engine which is arranged to connect a terminal end of a coil strand to a terminal member by pulling the terminal end of the coil strand out of a coil bobbin, positioning said terminal end of the coil strand in a U-shaped groove of a terminal member attached to the coil bobbin and then connecting the terminal end of the coil strand to said terminal member by fusing connection, while crushing the U-shaped groove of the terminal member, in which a guide member is provided on the coil bobbin to position the pulled out end of the coil strand at a predetermined position in the U-shaped groove of the terminal member.

Abstract: A method of constructing a distribution transformer of the type having a magnetic circuit in the form of one or more hollow coils and having primary and secondary windings by coiling an electrically insulated wire. The wires are then juxtaposed to form primary and secondary windings while interposing a flat insulating sheet material between adjacent coils. A cooling liquid is associated with the primary and the secondary coil windings and a rigid support frame is formed above these windings. A ferro-magnetic steel ribbon is coiled about at least one leg of the support frame containing the primary and secondary windings whereby to form a magnetic circuit.

Abstract: A distribution transformer and a method of making same. The transformer has at least one closed magnetic circuit in the form of a hollow toroidal coil made from ferro-magnetic steel ribbon. An electric circuit is formed by a primary winding and a secondary winding each constituted by one or more sub-assemblies in the form of a double pancake. These double pancakes are juxtaposed and molded together in a solid insulating material to form a rigid insulating frame on which the magnetic circuit is wound to form one or more magnetic coils. The rigid insulating frame, which is constituted by the primary and secondary windings and the insulating material, also includes therein conduits capable of circulating a cooling fluid through the windings whereby to provide heat exchange to cool the assembly of the electrical and magnetic circuits.

Abstract: A method for making a coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the method comprising providing a frame of non-metallic material, the frame having an aperture therethrough for the passage of material undergoing inspection, winding coils of electrically conductive strands on the frame, applying a first plastic coating in liquid form to the frame and coils, less the aperture portion of the frame, applying metal in fluid form to the first plastic coating to encase the first plastic coating in a metal layer, and applying a second plastic coating in liquid form to the metal layer to encase the metal layer in a second plastic coating.

Abstract: A coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the coil assembly comprising a frame of non-metallic material, the frame having an aperture therethrough for the passage of material undergoing inspection, coils of electrically conductive strands wound upon the frame, a first plastic coating adhered to the frame and coils, less the aperture portion of the frame, a layer of metal adhered to the first plastic coating to encase the first plastic coating in the metal layer, and a second plastic coating adhered to the metal layer to encase the layer in the second plastic coating.

Abstract: There is provided a method of fabricating a coil and in particular to one including the steps of forming a frame with two vertically disposed supporting legs, mounting an axial coil and notches on the supporting legs, cutting off the conducting wire from two ends of the ferrite core of the coil, joining the conducting wire to the two ends of the ferrite core, enclosing the combined coil and the supporting legs with resin, and bending the lower part of the supporting leg upwardly along the outer surface of the coil.

Abstract: A coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the coil assembly comprising a frame of non-metallic, the frame having an aperture therethrough for the passage of material undergoing inspection, coils of electrically conductive strands wound upon the frame, plastic material adhered to the frame and coils, less the aperture portion of the frame, and a coating of metal adhered to the plastic material to encase the plastic material in a metal layer.

Abstract: 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 as well as for firmly securing these coils and the iron core to the coil case. The resin-crack preventing member is moulded from a resinous material which is highly adhesive to the impregnated resin and which has a coefficient of thermal expansion similar to that of the impregnated resin. The resin-crack preventing member serves to prevent direct contact of the impregnated resin with the corners, side surfaces and inner surface of the iron core which has a coefficient of thermal expansion substantially different from that of the impregnated resin, thereby avoiding peeling off and cracking in the impregnated resin which would otherwise be caused by severe temperature changes.

Abstract: A hermetically sealed magnetic sensor for detecting variations in a magnetic field has a sensor element with an output terminal for detecting variations in the magnetic field and generating a signal. An output wire is connected with one end to the terminal for outputting a respective signal from the sensor element. A case having an opening on a side close to the output wire contains the sensor element. A first thermosetting resin fills the case for covering the sensor element. A second thermoplastic resin hermetically seals the opening in the case.

Abstract: An ignition coil, for use particularly in the ignition of an automotive internal combustion engine, includes a central magnetic core member on each side of which is arranged at least one magnetic current return circuit member and two windings, one of which is a primary winding and the other a secondary winding, arranged coaxially around the central magnetic core member. The primary and secondary windings and the central magnetic core member are arranged within an inner casing and covered with synthetic resin. An outer casing encloses the assembly thus formed and surrounded wholly or partially by the magnetic current return circuit member.

Abstract: A coil assembly for a metal detector and a method for making the coil assemblies for metal detectors of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the method comprising providing a frame of non-metallic material, the frame have an aperture therethrough for the passage of material undergoing inspection, winding coils of electrically conductive strands on the frame, applying plastic in liquid form to the frame and coils, less the aperture portion of the frame, and applying metal in fluid form to the plastic to encase the plastic in a metal layer.

Abstract: A coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the assembly comprising a frame of non-metallic material, the frame have an aperture therethrough for the passage of material undergoing inspection, a coating of carbon material applied to the exterior of the frame, a layer of plastic material applied over the carbon material, electrically conductive strands wound over the plastic material, the frame being fixed to a rigid metal housing providing an enclosed void around the exterior of the coated frame and strands, and foam plastic enveloping the frame and strands, the void being filled with the foam plastic.

Abstract: An assembly which includes a transformer having a primary winding, a secondary winding, wires extending from the windings, a core at least partially disposed within the windings, a mounting flange, a housing surrounding at least a part of the windings and apparatus for mounting a fuse block on the transformer. The apparatus for mounting includes a tongue extending within the housing and a potting compound disposed in the housing.

Abstract: An ignition coil have a secondary winding wound on and around a secondary bobbin, have one end of the secondary winding connected to a high voltage terminal, and have a portion of the secondary winding close to the connected end engaged with a binding portion formed on a circumferential edge of one end of the secondary bobbin, wherein the binding portion comprises a winding piece which projects outwardly in the radial direction of the secondary bobbin and around which an end portion of the secondary winding is wound in several turns, and an engaging piece which is formed to extend from the leading edge of the winding piece along the central axis of the secondary bobbin and which has a side surface formed with a groove for inserting the secondary winding for clipping.

Abstract: A surface mountable electronic device and method of making same wherein a discrete electronic device is encapsulated in a body of electrical insulating material having opposite ends and mounting surface extending between the ends, and an electrode is provided on each end. Each electrode includes a portion on the end of the body in electrical contact with the corresponding lead of the discrete electronic device and a contact portion extending along the mounting surface for making electrical connection to a circuit portion defined on a surface to which the device is mountable. The discrete electronic device is manufactured, prior to encapsulation, by known techniques. Preferably the body is a rectangular solid with each of the four sides having electrode contact portions thereon to serve as one of four possible mounting surfaces each with substantial mechanical stability.

Abstract: A compact valve choke that is simple to manufacture, which can, however, ensure the qualities required for all operating modes, namely the needed dielectric strength and freedom from partial discharges between components that are at different voltages. This valve-choke is achieved by having: the choke windings arranged in a supporting frame in a self-supporting manner, in relation to one leg of the choke core; the choke windings potted on all sides, and the potted block supported in the supporting frame by means of fittings; the choke core consists of two generally circular-shaped cores and is secured in the supporting frame; and the choke coil includes two primary windings wound in two layers, with an outer first winding portion and a concentric inner second winding portion as well as, a core-potential center tap roughly in the center of the windings between the first winding portion and the second winding portion.

Abstract: A compact high-voltage transformer resistant to moisture leaching and acids for airport navigation light systems includes primary and secondary windings wound upon a plastic coil form in turn surrounding a central portion of an iron transformer core. Connector socket members retained with prefixation on the coil form are provided with connector sleeves for receiving external leads, the sleeves being conductively connected to the ends of the primary and secondary windings. The transformer core is spaced from the inner surface of the coil form by means of spacer elements molded onto the inner surface of the coil form whereby a layer of thermoplastic synthetic resin material is injected between the core and the coil form during an injection molding operation. The injection molded jacket is the only insulation jacket provided in the transformer assembly.

Abstract: An ignition coil assembly for an internal combustion engine includes at least one first laminated core contained in a housing and having a plurality of first magnetic path connection end faces exposed to the inside of the housing, and at least one second laminated core having a plurality of second magnetic path connection end faces each opposing to one of the first magnetic path connection end faces through a thin gap. A primary coil and a secondary coil are wound on the second laminated core, and a plurality of soft waterproof layers are formed on inner walls of the housing to cover the first magnetic path connection end faces of the first laminated core.

Abstract: A leadless chip inductor having metallic terminal plates and a coil element fixed to the metallic terminal plates, the metallic terminal plates being partially enclosed, together with the coil element, by a resin molded cover, the portions of the metallic terminal plates exposed to the outside of the molded outer cover being bent along the edge of the molded cover so as to form terminals for connection to an external circuit. The mechanical and electrical connection between the metallic terminal plates and the lead lines led from the coil is achieved by brazing or welding the lead lines to the undersides of a narrow strip-shaped tabs which is projected from each metallic terminal plate. With this arrangement, the coil lead lines are securely connected to the metallic terminal plates.

Abstract: A coil is made having a plurality of layers of adjacent metal conductor windings subject to voltage stress, where the windings have insulation therebetween containing a small number of minute disposed throughout its cross-section, where the voids are voids filled with SF.sub.6 gas to substitute for air or other gaseous materials in from about 60% to about 95% of the cross-sectional void volume in the insulation, thus incorporating an amount of SF.sub.6 gas in the cross-section of the insulation effective to substantially increase corona inception voltages.

Abstract: An electromagnetic inductor means such as a transformer is improved by reducing the amount of condensable cooling liquid to a level approximating that actually needed to effect cooling; by injecting a resin into spaces between the casing and an insulating container surrounding the sides and bottom of the windings.

Abstract: An ignition device has a housing provided with a high voltage terminal post for receiving a cable. An ignition winding is supported in a coil form. An end of a solid wire is inserted into a hole in the coil form and an end of the ignition winding is wound around a free part of the wire. Then the coil form is inserted into the housing and the free end part of the wire is received in a housing recess at the rear end of the terminal post. A contact pin is pressed into the terminal post unitl the rear end of the pin makes contact with the wire. Then the housing recess is filled with casting resin to fix the pin and the wire with the winding end in position.

Abstract: A miniature variable inductor comprises a coil soldered to a pair of connecting skids. These skids are clipped to two oppositely disposed lateral walls of an injection-molded plastics cover in the shape of a hollow die. A solid part of the cover and a hollow space lie between these two walls. A central opening through these walls, the solid part of the cover and the hollow space defines a housing for a movable ferromagnetic core. There is a screwthread on at least part of this core. The coil is disposed in the aforementioned hollow space coaxially with the central opening, encapsulated in resin. The central opening has a threaded portion where it passes through the solid part of the cover. This threaded portion is complementary to the thread on the core.

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 ferrite toroidal core is inserted into an annular trough enclosed by a cap with a winding applied about the trough member which is then sealed by an envelope of resin. The trough member includes resilient tabs extending internally of at least one mutually concentric trough wall, the tabs having their free edges disposed against the toroidal core so that the core is fixed and centered within the trough and so that an air cushion is provided between the core and the trough wall.

Abstract: An electronic component includes a solid core part having a perpendicular prismatic spatial shape and lateral surfaces, the core part having a recess in the form of a blind hole formed therein defining a winding space, and electrical contact layers disposed on at least some of the lateral surfaces of the core part.

Abstract: A miniature variable inductor comprises a coil soldered to a pair of connecting skids. These skids are clipped to two oppositely disposed lateral walls of an injection-moulded plastics cover in the shape of a hollow die. A solid part of the cover and a hollow space lie between these two walls. A central opening through these walls, the solid part of the cover and the hollow space defines a housing for a movable ferromagnetic core. There is a screwthread on at least part of this core. The coil is disposed in the aforementioned hollow space coaxially with the central opening, encapsulated in resin. The central opening has a threaded portion where it passes through the solid part of the cover. This threaded portion is complementary to the thread on the core.

Abstract: A high-voltage current transformer of the head design with a column made of insulating material which supports the head housing. The primary lead is approximately U-shaped, whereby only its horizontal base passes through the central opening of secondary system and at least one of its two legs passes downwardly through a sealing plate in an insulating-medium-tight fashion to outside the space delimited by insulating column, and is contactable from below. The other of the two legs passes through sealing plate in the case of a switchable primary lead likewise downward in an insulating-medium-tight fashion and is directly contactable or in the case of a non-switchable primary is electrically connected to the sealing plate without any holes therethrough. The head housing, designed as hood, also completely encloses primary lead and secondary system from above and is fastened in an insulating-medium-tight fasion to sealing plate.

Abstract: A solenoid actuator including a coil of electrically conductive wire, a yoke of magnetic material surrounding the coil, and a non-electrically and non-magnetically conductive material encapsulating the coil and yoke. A pair of terminals connected to the ends of the coil project outwardly beyond an exterior surface of the encapsulation. Any of a variety of electrical connection modules is adapted to receive the coil terminals and electrically connect them to standard electrical connectors projecting from the module. Different modules have different forms of standard electrical connectors, so that regardless of the type of connector available at the source of electric power, a suitable module can be connected to the encapsulated coil for cooperation with the power source connector. The body of each module is formed of resilient material so that when the module is tightly attached to the coil encapsulation, a seal is formed completely surrounding the coil terminals.

Abstract: An improved adaptor for using fluorescent lighting in fixtures designed for incandescent lamps which comprises a housing having a centrally located lined cavity which depends through the housing and which is adapted to receive the starter element, a mounting means or plug which depends from the lower surface of the housing, and ballast disposed within the interior of the housing adjacent to or about the lined cavity which depends through the central portion of the housing.

Abstract: An electromagnetic pickup includes an insulating body that mounts a coil of wire surrounding a spool portion at one end of the body. A magnetic element is disposed within an axial passage through the body, including its spool portion. A sleeve-like molded plastic cover surrounds the spool portion and other portions of the body, and an encapsulation occupies the spaces within the cover that are not occupied by the body and elements mounted thereto. One end of the magnetic element extends to one end of the body and abuts the inner surface of the wall that encloses one end of the cover. The other end of the body is provided with a self-centering flange that engages the inner surface of the cover, and the other end of the cover is provided with the flange that is embedded in the encapsulation that also forms a seat external of the cover.

Abstract: A capacitive discharge pulsed plasma ignition system which is suitable for retrofitting to standard automobile engines, and easily adaptable to new engines, including diesel engines, which has been substantially improved by using a novel ultra-high efficiency ignition transformer (coil) (3) with an optimized high current and high voltage output. The ignition is preferably used with a high pulse rate, high efficiency, multiple pulse ignition box providing rapid pulsed plasma ignition sites. The coil (3) has a low winding turns ratio of about 40, low primary (1,11) and secondary (2,12) inductances and resistances, low loss in its core (3a), low secondary capacitance (5), and is used in conjunction with a capacitor (4) of capacitance between 1 and about 20 microfarads. The system uses voltage doubling at the spark gap (9) through coil/capacitor design combination to fire a wide spark gap (9) and provide a very high current.

Abstract: An explosion-proof plug includes a first casing part having two ends and an outer wall having an edge and defining a compression-resistant annular chamber being open toward one of the ends, an annular transformer disposed in the annular chamber, a cover secured to the first casing part covering the annular chamber and the transformer, a second substantially bowl-shaped casing part adjacent the edge of the outer wall, the second casing part and the cover together defining a first connection space with increased security as compared to other portions of the plug for receiving connecting cables to be connected to the transformer, a third casing part securely connected to the first casing part defining a second space of increased security, and plug pins being held in the third casing part and connected to the transformer.

Abstract: A coil assembly includes a first winding for circumferentially surrounding at least a portion of a leg of a transformer core, a second winding spaced from and circumferentially surrounding at least a portion of the first winding, first supports, such as axially extending insulative rods, disposed between the first and second winding, for inhibiting axial motion of the second winding relative to the first winding and a second support disposed about at least a portion of the outer periphery of the second winding for inhibiting radial motion of the second winding relative to the first winding. Encapsulating material, such as an epoxy resin having glass fibers disposed therethrough, is disposed between the first winding and the leg, between the first and second winding and disposed about the second support for forming a monolithic structure. In a transformer including such a coil assembly, the leg and conductors forming the windings may be fluid cooled.

Abstract: For a four cylinder engine, there are provided two ignition coil units, each including a primary coil and a secondary coil. The primary coil is wound around a center core made of grain oriented silicon steel, which forms a closed magnetic path for the magnetic flux produced by the coil unit together with a side core formed of non-grain oriented steel as one body. In the closed magnetic path there is provided an air gap. The current of the primary coils is controlled by transistors operated in response to gate signals furnished from an ignition control unit. The transistors are provided with a diode in the reverse parallel therewith. With these arrangements, the ignition coil assembly for an electronic distribution system can be miniaturized with the unfavorable influence of the magnetic inteference suppressed remarkably.

Abstract: An inductor housing having a platform for supporting an inductor and a standoff unit for supporting the platform away from a conductor board such that various electrical components can be installed on the conductor board between the inductor platform and the conductor board surface. The inductor housing also has a hole disposed therethrough such that the inductor housing may serve as an insulating standoff support member for connecting a conductor board to a chassis.

Abstract: 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 an electronic circuit in which noise is to be suppressed.

Abstract: A flyback transformer wherein the tertiary coil is wound on an auxiliary bobbin provided separately, insertedly on the low tension coil bobbin for the primary coil, thereby to render to insulate completely the tertiary coil from the primary coil.