Abstract: A magnetic noise eliminator mounted around the signal line of a computer or the like to stabilize the magnetic field produced by the signal line and to protect it against outside noise. The magnetic noise eliminator has two symmetrical cover shells connected together by forcing the longitudinal teeth and longitudinal grooves of one cover shell into engagement with the longitudinal grooves and longitudinal teeth of the other, and two longitudinally grooved magnetic blocks abutted together by forcing the longitudinal flange and longitudinal recess of one magnetic block into engagement with the longitudinal recess and longitudinal flange of the other.

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: An electrical transformer includes a housing, a transformer core and winding subassembly located within the housing, and an active mount subassembly having an active mount and a controller. The active mount has a first end attached to the housing and a second end attached to the transformer core and winding subassembly. The controller has an output port connected to the active mount. The active mount cancels out (or reduces) noise-causing vibrations which come from the transformer core and winding subassembly during transformer operation.

Abstract: A improved stator apparatus for use in the ignition system of an internal combustion engine. The stator apparatus comprises a magnetically permeable core having a coil housing mounted to a leg portion thereof. A coil assembly including a voltage transformer is maintained in the coil housing. The various coils of the coil assembly are mounted about a central chimney member of the housing coaxial with the portion of the core extending therethrough. A circuit grounding member is electrically connected between the voltage transformer and the core by frictional contact therebetween. The circuit grounding member is constructed of a generally flat conductive piece having a longitudinal ridge defined along a portion of its length. In exemplary constructions, the longitudinal ridge extends along side a portion of the core and is biased into frictional contact therewith. The ridge facilitates assembly of the stator apparatus as well as enhancing electrical connection of the grounding member with the core.

Abstract: The invention is directed to an ignition coil for use in an internal combustion engine. The ignition coil includes a core and a bobbin in which at least a part of the core is received. Primary and secondary windings are wound around the bobbin. A secondary terminal is mounted on the bobbin, and a high-tension terminal is mounted on a housing. The secondary terminal is formed in a Y-letter shape with its body portion and a pair of leg portions. The high-tension terminal is formed with a recess, in which the leg portions of the secondary terminal are received. Each of the leg portions has a projection which is biased to contact with the inner surface of the recess.

Abstract: A noise absorbing device is adapted to prevent radiation noise or induction noise from a cable connected to an electronic apparatus. A pair of holder segments (11 and 12) receive core pieces (20) in receiving recesses and are coupled by hinge portions (19) so as to be brought into butt contact with each other so that the pair of core pieces (20) form a cylindrical body with a cable extending therethrough. Elastic pieces (31) are interposed between the pair of core pieces (20) and the pair of holder segments (11 and 12) in order to provide an elastic force to the core pieces (20) so that the core pieces are slightly protruded from opening edges of the holder segments (11 and 12). When the pair of holder segments (11 and 12) are brought into butt contact with each other, the pair of core pieces (20) are put into press contact with each other by the elastic force of the elastic pieces (60).

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: The invention relates to a liquid-cooled valve reactor, in particular for a high-voltage DC transmission installation, including a reactor core (2) and a reactor coil (4), the reactor coil (4) including a primary winding (24), which comprises two cooled winding sections (30, 32), and a secondary winding (26), and the reactor core (2) being provided with a plastic jacket (14). According to the invention, the reactor core (2) is provided with a clamping frame (56) which has on its free surfaces (58) in each case a heat dissipator (60), a liquid-cooled secondary resistor (28) is provided, which is connected electrically in parallel to the secondary winding (26), and the encapsulated reactor core (2) and the reactor coil (4) are mounted on a baseplate (6). The result is an intensively cooled valve reactor.

Abstract: A high voltage transformer module (50) having a pair of high voltage substrates (64, 66) and a pair of low voltage substrates (62, 68) on which high and low voltage components are respectfully mounted. Mounted between the substrates are a plurality of transformers (92a, 92b, . . . 92n). In a preferred embodiment, each of the plurality of transformers is coupled to a full bridge rectifier (102a, 102b, . . . 102n) and the outputs of the rectifiers connected so that an output voltage produced by each transformer/rectifier pair is summed to produce a total output voltage for the high voltage transformer module. Electrical shorts are prevented within the module by fixedly mounting the substrates in the casing and by filling the cavities formed between the substrates with insulation having a high breakdown voltage. The components on the high voltage substrates are both physically and electrically isolated from the components on the low voltage substrates.

Abstract: An encapsulated transformer includes a transformer coil assembly, a rigid core insert having an upstanding portion positioned within the hollow interior of the core and a base portion on which the core rests, and a thermoplastic rubber jacket that completely surrounds the transformer coil assembly and is bonded to the base portion of the core insert to provide a completely waterproof encapsulated transformer which is impervious to liquid and gasses that could be detrimental to the performance of the transformer. A method for producing such an encapsulated transformer includes placing a rigid core insert in a mold cavity of a mold, and positioning a transformer coil assembly in the mold cavity so that the transformer coil assembly rests on the core insert. Thermoplastic rubber is then injected into the mold cavity to completely encapsulate the transformer coil assembly in a jacket of thermoplastic rubber.

Abstract: A magnetic sensor is provided having a pole piece, a housing for receiving and containing the pole piece, a sensing magnet and a cap for mounting the sensing magnet within the housing while retaining cracked magnet portions and either absorbing forces applied by the housing or distributing them over an entire surface of said magnet. In another aspect the invention provides a cap for mounting a sensing magnet in a magnetic sensor housing.

Abstract: A variable reluctance sensor including a close-ended hollow housing which contains and thereby protects the operative components of the sensor. The sensor includes a bobbin portion interconnected with a connector member attachable to a submersible connector. An elongated pole piece extends through a bore in the bobbin barrel and press fits into a cavity in the connector member. A magnet is disposed at the end of the pole piece, and a magnet wire coil is wound around the bobbin barrel and electrically connected with conductors in the connector member. An outer hollow housing, which surrounds the bobbin portion, includes an open end portion which is ultrasonically welded to the connector member. After ultrasonic assembly of the housing to the connector member, the magnet rests against the opposite, close-ended portion of the housing. In an alternative embodiment, the housing and bobbin portion may be keyed to ensure proper assembly, and further a leaded sensor may be provided.

Abstract: A signal discriminator comprising:a plurality of sets of dual divided magnetic cores having different characteristics;a case made of a synthetic resin having a hinge capable of opening and closing the case and a latch means, of which inner portion is divided into sections by a plurality of partition plates, said sections respectively accommodating the plurality of sets of dual divided magnetic cores; andpress-contacting means interposed and retained between the case and the plurality of sets of dual divided magnetic cores, which press the plurality of sets of dual divided magnetic cores when the case is closed and latched by the latch means, thereby uniformly press-contacting respective divided faces of the plurality of sets of dual divided magnetic cores.

Abstract: A locating ring for positioning and supporting an electric coil within a mold for encapsulation of the coil. The locating ring comprises an annular body defining a central axis and a plurality of tabs extending generally axially from the annular body. The annular is adapted to insulate the coil from a steel shell. The tabs are adapted to position the coil within the mold. In a preferred embodiment, the tabs include a recess along a portion of the radially inner face thereof which receives the encapsulating material prevents the separation of the tabs therefrom. In an alternate embodiment, a portion of the sidewalls of each tab are tapered outwardly from the inner face to the outer face thereof. In another aspect of the invention, the body of the locating ring includes a plurality of circumferentially spaced openings extending axially therethrough which provide a number of routes by which air may be vented during the molding operation.

Abstract: A signal discriminator which comprises a plurality of divided magnetic cores which surround a peripheral part of a cable when the plurality of divided magnetic cores are integrated. A resin case formed of a plurality of sections is capable of opening and closing and accommodates the plurality of divided magnetic cores. A press-contacting device press-contacts at least one of the plurality of divided magnetic cores and a corresponding one of the plurality of sections of the resin case. Engaging protrusions on the plurality of divided magnetic cores engage with corresponding recesses on the plurality of sections of the resin case.

Abstract: An ignition coil assembly for an internal combustion engine includes a primary coil, a secondary coil, at least one bobbin, a core, a first resin member and a casing. The primary coil and said secondary coil are wound on the bobbin. The core has core elements with a gap there-between through which the primary and secondary coils are magnetically coupled to one each other. The casing accommodates the primary and secondary coils, the bobbin and the core. And the first resin member covers a part of the core elements, the part which are confronted with said secondary coil, and the first resin member is accommodated in the casing.

Abstract: A power box (12) for a low voltage lighting system (10). Power box (12), which connects to a 120 VAC source via 120 VAC cable (15) and a plurality of low voltage light fixtures (14) via a 12 VAC cable (16), includes a "tortuous path" strain relief (40) including a first strain relief structure (41) in a base (19) having vertically spaced horizontal ribs (44, 46, 48) and a second strain relief structure (43) in a cover (28) having corresponding vertically spaced horizontal ribs (56, 54, 52). When base (19) and cover (28) are assembled, structures (41 and 43) align such that the ribs interdigitate or mesh to form the tortuous path strain relief (40) for the 120 VAC cable (15). Another aspect of the invention is the use of a standard spade lug connector (77) and a pair of "double-L" spade lug connectors (78) for making the internal and external 12 VAC connections to a step down transformer (60) and the 12 VAC cable (16), respectively.

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: An ignition coil for an internal combustion engine has a housing composed of an insulating material and having an insertion opening, at least one ring-shaped core composed of a soft magnetic material and having a portion insertable in the housing, a primary coil body and a secondary coil body, a primary coil and a secondary coil wound on the primary coil body and the secondary coil body and arranged coaxially to one another on the portion of the core, the housing being provided with a high voltage dome extending substantially perpendicularly to a central axis of the coil bodies, a connecting pin insertable along a longitudinal axis of the high voltage dome and connected via a diode with a high voltage winding end of the secondary coil. The connecting pin, the diode and the coil bodies with the coils together form an operationally premounted assembly insertable through the insertion opening in the housing. A spacer connected with one of the coil bodies. The housing completely surrounds the core.

Abstract: A head type current transformer having an aluminum head housing mounted on top of and supported by a porcelain insulator. The head housing and insulator together define an enclosure housing therein an, insulated, electrical component immersed in a liquid dielectric. The transformer unit is rendered explosion resistant by having a shock wave attenuator located at least partially in the liquid in the vicinity of the juncture of the housing and insulator to reduce the force of a shock wave originating in the head housing below that which would cause fracturing of the porcelain insulator. A selected area of the wall of the head housing is also patterned to facilitate its rupture in a predetermined area which is in the region of the highest voltage stress area. A filler material of felt is also used to displace a portion of the oil dielectric at the area of weakness.

Abstract: A porous preform is densified by heating while emersed in a precursor liquid. Heating is achieved by passing a current through the preform or by an induction coil immersed in the liquid. Ways to control the densification process are also described.

Abstract: A variable reluctance sensor assembly including an open-ended housing which contains a bobbin assembly with an overmolded connector piece. The bobbin contains a ferrous pole piece pressed into a closed-ended cavity within the bobbin, a small disc-shaped rare earth permanent magnet mounted forward of the pole piece, and a magnet wire coil wound upon the bobbin barrel and attached to the customer terminals which carry the output signal. A separate submersible connector is affixed to the integral connector. A front seal ring is stretch fit to the forward flange of the bobbin, and a rear seal ring is stretch fit to the rear section of the sensor housing. The bobbin assembly is slip fit into the housing with magnet forward.

Abstract: An inductive coupler for transferring electrical power from the primary to the secondary is disclosed. A secondary coil assembly having a pair of cores each having a secondary winding is disposed in a case having an opening at one end thereof. The core has a central post projecting from the axial center of a disc-shaped base and an annular skirt projecting from the rim of the base in the same direction, thus forming therebetween an annular groove in which the secondary winding is disposed. As a coil case having a primary winding is inserted between the paired cores and moved further inward of the case, the secondary coil assembly is moved inward of the case. During this movement of the secondary coil assembly, its paired cores are caused to displace toward each other while being guided by pins sliding along guide slits until the cores are mated together thereby to form a magnetic circuit of the inductive coupler.

Abstract: A signal discriminator comprising:a plurality of sets of dual divided magnetic cores having different characteristics;a case made of a synthetic resin having a hinge capable of opening and closing the case and a latch means, of which inner portion is divided into sections by a plurality of partition plates, said sections respectively accommodating the plurality of sets of dual divided magnetic cores; andpress-contacting means interposed and retained between the case and the plurality of sets of dual divided magnetic cores, which press the plurality of sets of dual divided magnetic cores when the case is closed and latched by the latch means, thereby uniformly press-contacting respective divided faces of the plurality of sets of dual divided magnetic cores.

Abstract: There is provided an enclosure that encapsulates a current transformer by utilizing a snap together design while allowing for electrical coupling between the transformer and external wiring. Two housing members will snap together while capturing the transformer in a rigid fashion to avoid excess vibration or friction, which could fatigue the transformer's wiring.

Abstract: A noise absorber that can be securely attached around electric wires of various diameters and types, and can be firmly closed without any electric wire caught between the ferrite parts. Wire supports are erected at both sides of a wire-receiving through hole on the inner surfaces of opposed walls of a first case member of the noise absorber. The tips of the wire supports are tilted toward the central axis of the through hole. Almost Y-shaped receptors are formed on the inner surfaces of opposed walls of the second case member for engaging with the tips of the wire supports when the case members are closed. The upper portions of the receptors serve as guide slopes for pressing inwardly the tips of the wire supports, so that the wires are securely pinched between the wire supports.

Abstract: An ignition coil for internal combustion engines including a primary core formed in a shape of rectangular ring and fixed on the inner peripheral edge of the bottom wall of a casing, a secondary core having a main portion of which is formed in a shape of straight beam, a primary winding assembly having a primary bobbin formed on the main portion of the secondary core, and a secondary winding assembly. Both winding assemblies are housed in an internal space of the casing, and a synthetic resin is filled in the internal space of the casing and cured. In the side wall of the casing is formed a rectangular opening portion which opens at the top end; and on the primary bobbin a rectangular closing member is formed integrally therewith. When the opening portion of the casing is closed with the closing member, both end faces in the longitudinal direction of the secondary core formed in the primary bobbin face to the inside peripheral surfaces of the primary core.

Abstract: An electric noise absorber comprising at least two ferrite pieces having abutting planes, at least two case members containing the ferrite pieces respectively and being closed by means of engagement members, and a spring member provided in at least one of the case members for pressing the ferrite pieces against each other when the case members are closed. Since the case members for keeping the ferrite pieces in appropriate positions and the spring member for pushing up the ferrite pieces for close contact are separately molded, the case members are bestowed with strength and the spring member with elasticity, both suitable for their own purposes. The case members requires no apertures for biasing members and therefore outside magnetic substance is prevented from contacting with the ferrite pieces contained in the case members.

Abstract: In a device for positional fixation of a coil support in a cup-shaped formed casing part, wherein a closure part (4, 8) is attached to the cup-shaped casing part (1, 2, 22). Said closure part (4, 8) is disposed on the side of the coil support (10, 19, 21) , located remotely relative to the floor (22) of the cup-shaped casing part (1, 2, 22), in or, respectively, at the cup-shaped casing part (1, 2, 22). Tongue-shaped adjuncts (9, 33) are furnished at the closure part (4, 8). Said tongue-shaped adjuncts (9, 33) extend in a direction toward the coil support (10, 19, 21) and exhibit nose-shaped protrusions (13, 29) directed toward the wall of the coil support (10, 19, 21) . Projections (11, 31) or, respectively, recesses (12, 30), are formed like a lock toothing, and are furnished at the coil and are disposed toward the tongue-shaped adjuncts (9, 33).

Abstract: An assembly for mounting a transformer in a tank, comprising a top and bottom frame, the transformer being located between the top and bottom frames. A plurality of slots are disposed in a row in the top frame. L-shaped brackets are provided for securing the transformer to the tank. The brackets include a toggled end disposed on one end and a shear lug located interior of the toggled end. The toggled end and the shear lug are each disposed in one of the plurality of slots to secure the transformer with the tank. The plurality of slots allow relocation of the brackets along the top frame. A bore is also disposed in the L-shaped bracket. A mounting screw extends through the bore and through one of the plurality of slots in the top frame to further secure the top frame to the tank, the mounting screw maintaining electrical continuity between the top frame and the tank. The shear lug bears any lateral forces which would be otherwise received by the ground screw.

Abstract: This transformer comprises a tank containing insulating liquid and an amorphous alloy core within the liquid comprising 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 and locating the legs within two windows of the coil structure. A box-like enclosure primarily of electrical insulating material encloses the lower yoke and is positioned to capture therein chips of amorphous alloy that might become detached from the core and fall toward the bottom of the tank.A first portion of the box-like enclosure extends between the two windows of the coil structure and is held against the bottom of the coil structure. This first portion includes flaps that are folded upwardly into the two coil windows to form liners for these windows, but still leaving clearance space within the windows around the core legs through which detached chips may fall past the liners into the box portion of the enclosure.

Abstract: A self leaded holder for surface mounting of a circuit element to a PC board comprises a generally box-like support body having a cavity for mounting a circuit element, the support body having a base and a plurality of lead support members having a generally spool configuration extending generally horizontally outward from the support body adjacent the base, lead ports extending from the cavity through the sides, an inductance coil mounted in the cavity, and a lead extending from the coil via the lead ports to and wound a partial turn around each of the lead support members and disposed for surface bonding to a PC board.

Abstract: A coil component having a magnetic core together with a coil is precisely and correctly positioned on a printed circuit board by using an automatic mounting machine, which has a vacuum nozzle (6) for lifting the coil component, and a pair of adjusting chips (7,7) for finely adjusting the location of the coil component by pushing a wall of the coil component. The coil component comprises a dielectric support (insulator) (1), a plurality of terminal pins (2) molded in said support, each having a first end (2a) along a first side of the support for coupling with an end of a coil wound around a magnetic core, and a second end (2b) along a second side which is perpendicular to said first side for coupling with an external circuit on a printed circuit board.

Abstract: A transformer, particularly for use in intrinsically safe systems, has separate first and second magnetic cores mounted in wells in a one-piece elastics housing which serves both as a housing and to electrically segregate the cores. Passing through the housing and through the cores is a wire loop which is turned back and joined outside the housing so as to link the two cores electromagnetically. The cores are preferably toroidal cores carrying windings.

Abstract: A valve block, in particular for slip-controlled hydraulic brake systems, includes a plurality of valve domes (10) incorporating magnet coils (1) and insulating casings cast around the magnet coils (1), as well as a contact carrier (2) containing a plurality of electric conductors (4), with the insulating material (10) encompassing the magnet coils (1) forming an integral unit with the contact carrier (2). The resulting design improves manufacturability, functional reliability, modular design flexibility and serviceability.

Abstract: An apparatus for providing electromagnetic shielding. A wire for carrying an electrical signal is shielded with a first cylindrical ferrite shield by passing the wire through its central passage. The first ferrite shield has magnetic characteristics which provide attenuation of electrical noise over a first particular frequency band. A second cylindrical ferrite shield is situated adjacent the first shield with the wire passing through its central passage. The second ferrite shield has magnetic characteristics which provide attenuation of electrical noise over a second particular frequency band. A plastic package surrounds the first and second ferrite shields, and holds the first and second shields end to end in fixed proximity to one another. The plastic package includes a pair of half-cylindrical package sections having a joined edge and two open edges with a hinge portion joining the pair of package sections at the joined edge.

Abstract: A variable reluctance sensor assembly including an open-ended housing which contains a bobbin assembly with an overmolded connector piece. The bobbin contains a ferrous pole piece pressed into a closed-ended cavity within the bobbin, a small disc-shaped rare earth permanent magnet mounted forward of the pole piece, and a magnet wire coil wound upon the bobbin barrel and attached to the customer terminals which carry the output signal. A separate submersible connector is affixed to the integral connector. A front seal ring is stretch fit to the forward flange of the bobbin, and a rear seal ring is stretch fit to the rear section of the sensor housing. The bobbin assembly is slip fit into the housing with magnet forward.

Abstract: The present invention is a standardized transformer battery charger assembly for assembling a self-contained transformer battery charger with a built-in printed circuit board (PCB). The transformer batter charger assembly comprises a two-piece casing for housing a transformer unit and the printed circuit board. The PCB has a heat exchange relationship with the casing. The transformer unit includes a primary piece having a primary bobbin for accommodating a primary winding, and a secondary piece having a secondary bobbin for accommodating a secondary winding.

Abstract: The noise absorber for an electrical wire of electronic equipment having a pair of mating members, at least a portion of which is molded of magnetic resin. The wire of electronic equipment, when positioned between the pair of mating members, is completely surrounded by the members molded of magnetic resin, so that magnetic flux is not excluded. Therefore, any noise generated within the wire is absorbed by the noise absorber.

Abstract: Disclosed is an engine igniting coil device which comprises a plurality of coil units arranged in a case and unitarily potted therein with thermosetting resin, and is characterized by that only when the coil units being mounted in the coil case, electrical connections at the primary and the secondary sides may be accomplished with the optimally treated primary and secondary wirings.

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 box structure of a top, a back, a bottom, and two sides welded together to form an open front structure, and a two-piece front cover detachably attachable thereto; an interior horizontal wall welded in place to divide the interior space into a larger upper compartment to house the transformer, and a smaller lower compartment to house the wires connecting the transformer to a cable which has access to the lower compartment through a knock-out stamping in the bottom; two hanger strips attached to the top and the bottom, respectively, for attaching the box to a support; all of the seams for connecting the top and the bottom to the sides, the back, and the front cover being oriented such that water dripping over the outside of the box will be directed away from flowing to the inside of the box.

Abstract: A high pressure proximity sensor for high pressure environments uses a balanced bridge variable inductance magnetic core structure to detect the presence of a external ferrous object by a change in inductance. The sensor magnetic flux path is defined by the sensor's specific geometry which includes core windings on the core and a sensor housing. The core includes a center post of a nonmagnetic material to transfer stress from a housing sensor face to the core's symmetric axis to cancel the effect of an external pressure induced stress on the sensor. The center post is encircled by an elastomer barrier between the housing sensor face and an adjacent end of the internal core to prevent migration of an internal potting compound between the core end and the sensor face. This structure provides satisfactory sensor operation in environments imposing shock and vibration on the sensor as well as high external pressures.

Abstract: A noise suppressor for permanent engagement over a cable comprises first and second case halves which are connected to each other by a hinge. At least one female latch tab is mounted to the first case half near an interior surface of the first case half and a male latch tab is mounted on an interior surface of the second case half. With the first and second case halves closed over a cable, the male and female latch tabs are locked to each other and are inaccessible from outside the case. The case may not be opened except by destroying the case. End walls of the case portions have recesses for passage of the cable therethrough and each case portion contains a suppressor core having a passage for receiving the cable.

Abstract: A bobbin provides a coil wound on the outer peripheral surface and allows a threaded core to be screwed on the inner peripheral surface. This bobbin is covered with a jar-like core and a metal case. The jar-like core and the metal case provide through holes for receiving a driver used to handle a threaded core. The edge of the through hole of the metal case is located radially inside or outside of the edge of the through hole of the jar-like case. It results in preventing the edge of the through hole of the jar-like core from being broken by a burr formed on the edge of the through hole of the metal case.

Abstract: A palm button switch apparatus includes a housing, a solid palm button fixedly mounted on the housing, a guard fixedly mounted on the housing and surrounding the periphery of the palm button. A bore extends through the housing and into the palm button. The bore has an open first end and a second end covered by the palm button. A proximity switch having a sensing end is mounted in the bore with the sensing end disposed in proximity with the palm button for detecting the presence of an operator's fingers on the palm button. The housing, the palm button and the guard are integrally formed as a one-piece unit from a molded plastic.

Abstract: A superconducting transformer comprises primary and secondary superconducting coils which are coaxial and made of superconducting wires, and a cryostat for maintaining the superconducting coils in a superconducting state. The cryostat includes a vessel for containing refrigerant and which is formed of a ferromagnetic material. The coils are immersed in the refrigerant. Rod formed of ferromagnetic materials is inserted in the primary and secondary superconducting coils, and is magnetically coupled with the vessel. The cryostat also includes a heat insulating tank for thermally insulating the rod and the vessel from the refrigerant. The rod and the vessel together form a closed magnetic circuit, and function as a core for the superconducting coils.

Abstract: A split ferrite bead case is provided for a flat conductor cable. The case includes opposed elongated slots for a flat conductor cable to extend through so that the split ferrite bead can suppress electromagnetic interference carried by the flat conductor cable. The opposed elongated slots include cable holding means which are operative to prohibit lateral and angular shifting of the flat conductor cable in the split ferrite bead and prevent the case from sliding along the length of the flat conductor cable.

Abstract: An ignition coil, in particular for an internal combustion engine for an automotive vehicle, comprises, integrated into a housing, a magnetic assembly which includes a magnetic core mounted within a primary spool, with a secondary spool arranged coaxially around the primary spool. The spools carry the primary winding and the secondary winding, respectively, and the coil further includes a magnetic flux return circuit and a high tension connection assembly. The latter includes an insert member secured in the secondary spool, a high tension busing and a high tension guide member in which the high tension output member is mounted, and is characterized in that the high tension output member comprises a spring.

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 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.