Abstract: A transformer assembly having a mounting plate of electrically conductive material An electrically conductive core of a transformer has an end mounted on the plate and electrically connected to the plate. A fastener on the plate engages an opening in a junction box. The plate provides an electrical connection between the core and the junction box to ground the transformer to the junction box. The transformer has a coil on the core, the coil having wires adapted to be connected to the terminal wires in the box. The plate and the fastener support the plate and transformer on the junction box.

Abstract: A coil body for electrical coils includes a solder terminal strip applied to the coil body flange which has solder eye terminals arranged in a row. One end of the solder eye terminals are in the form of solder eyes for wrapping and winding wire ends of thin wires or for holding the ends of thick wires, and the other end of the solder eye terminals are pins for emplacement into printed circuit boards. The solder eye terminals are in the form of right-angle wires injected into the solder terminal strips, whose one ends are bent U-shaped and are spaced from the solder terminal strips a sufficient distance to enable automatic winding onto the bent U-shaped end.

Abstract: A wire-wound bobbin serves as the core of a current transformer. A magnetic material flux path is disposed on the core that encircles the core coincident with the coils of the bobbin at least once and radially encircles the cross section of the core at lest once. The magnetic flux path comprises an assembly of distinct magnetic members positioned on the core and held in place by tape or the like.

Abstract: A terminal device for connecting an end portion of an exciting coil to an external conductor, said exciting coil being formed on a bobbin and operating, for example, a contact of an electromagnetic contactor. The terminal device includes a terminal base mounted on the bobbin, an electrically conductive terminal plate, and means for mounting the terminal plate to the terminal base such that a force exerted on the terminal plate at its end connected to the external conductor is not transmitted to the end portion of the exciting coil.

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 safety insulated transformer where there are at least three layers of safety approved insulating material between any parts of the wires forming first and second windings. The first winding is wrapped torroidally with a strip of safety approved insulating material, the successive layers of that wrapping overlapping to form at least two of the required layers of safety approved insulating material, and either overlapping to form all three required layers or at least one of the wires having a coating of safety approved insulation. Preferably the ends of the wire of the first winding have end insulation comprising coiled overlapped layers of safety insulation, and a layer of additional safety insulation material of at least two superimposed thicknesses makes a minimum of one and one half turns transversely of the coil of the first winding around the coil in the region or regions where the ends leave the coil.

Abstract: A separable inductive coupler for transferring electrical power across a dielectric medium using magnetic induction. Its coil geometry allows for easy disassembly of primary and secondary circuits. When primary and secondary coils are mated, an extremely low leakage inductance transformer is formed. This provides for good high frequency operation at high power density. The coupler allows electrical power transfer without metal-to-metal contact. The design allows easy removal of the primary or secondary coil from the transformer. The coil geometry has very low leakage inductance and very low high-frequency resistance which allows high frequency operation. The power transfer density is much higher than previously achieved with separable inductive couplers. Approximately 6000 watts has been transferred through a version of the present separable inductive coupler having a volume of 25.8 cubic inches, yielding a power density of 230 Watts/cubic inch.

Abstract: An inductive device comprises a first winding which is provided on a core and which is composed of electrically conductive segments which are shaped approximately as a U-shaped plate having two substantially parallel end portions of unequal width and a wedge-shaped central portion. The segments are formed as metallized portions of the outer surface of a cap which is made of an electrically insulating material and which is shaped as a ring having a U-shaped cross-section. The segments are electrically isolated from one another by non-metallized strip-shaped portions of the outer surface of the cap. The cap comprises includes metallized pins which constitute connection members for the segments and which are connected to electrical conductors, for example, on a printed circuit board. In conjunction with the segments, the conductors constitute the first winding.

Abstract: An electromagnetic apparatus such as a transformer or a single winding inductor is provided with a cooling arrangement. The apparatus has a magnetic core and a coil winding disposed about and carried by a leg of the core. The magnetic core has legs connected to the leg that carries the coil winding and these legs have flat surfaces that directly contact a flat surface of a metallic heat sink to thereby provide a direct heat conductive path from the legs to the heat sink. Heat generated in the coil winding is transferred to the heat sink via the leg that carries the coil winding and then to the heat sink via the legs that directly engage the heat sink. Heat generated in the magnetic core due to hysteresis or eddy current loss is also transferred to the heat sink.

Abstract: A reactor having a coil surrounded by a magnetic shield formed of laminated magnetic sheets. Connecting members pass through the central opening of the coil and are clamped between sheets of the magnetic shield. Each connecting member comprises a pair of connecting plates having opposite ends expanded. They are inserted from opposite sides of the central opening of the core, and are fixed together. The expanded parts at both ends of the connecting member increases the friction, and reduces vibration and noises.

Abstract: An electrical coil unit has a bobbin which includes two flanges, and a winding portion between the flanges, on which a coil winding is wound, and beside at least one of the two flanges, another flange is provided to form an auxiliary winding portion, and removal of the insulating film from the leader extended from the winding starting or finishing end of the coil winding is subjected in the region of the auxiliary winding portion. Thereby, the bare end portions of the leaders of the coil winding are prevented from going into the region of a winding portion of a bobbin.

Abstract: A transformer having a barrel winding comprised of flat conductive film conductors is provided with a repeatable winding configuration by employing a dielectric metal laminate as the winding material and by patterning both primary and secondary windings on the same dielectric membrane, thereby fixing the relative positions of the primary winding and secondary winding terminals and conductors.

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

Abstract: A three phase transformer, e.g. a distribution transformer comprising three, substantially identical, frame shaped winding assemblies each containing primary and secondary windings which together form half legs having substantially semicircular cross section. The winding assemblies are placed together to form a triangular structure, so called temple configuration, wherein the half legs of adjacent winding assemblies combine into three legs having substantially circular cross section. A magnetic circuit is formed around each leg by winding a continuous strip of a ferromagnetic sheet material around the leg.

Abstract: A double-insulated transformer of the coaxial type comprises a core assembly having a center core, a primary winding assembly assembled to surround coaxially the center core which has a primary bobbin case, a primary coil winding wound around the bobbin case and a primary terminal portion provided at an axial end of the bobbin case for connecting the primary coil winding and input lead lines, a secondary winding assembly to surround coaxially the primary winding assembly which has a secondary bobbin case, a secondary coil winding wound around the secondary bobbin case and a secondary terminal portion provided at an axial end of the secondary bobbin case opposite to the primary terminal portion for connecting the secondary coil winding with external lead lines, and an insulating case assembled to surround coaxially the secondary winding assembly.

Abstract: A noise suppressor for engagement over a cable, comprises a ferrite core having a core passage extending therethrough from one end to the other. A sleeve of resilient insulating material is cast, injected, dipped or molded over the ferrite core to cover the core. The sleeve includes on opposite sides thereof, a sleeve passage communicating with the core passage. One of the projections may be resilient or may be replaced by a closed end of the sleeve with a slit, for closely engaging a cable to fix the sleeve at a selected location along the cable. A pad may be included in one or both of the sleeves to further hold the sleeves securely on the cable. The sleeve may have a cylindrical or rectangular cross section to accommodate cylindrical or ribbon shaped cables.

Abstract: A transducer is disclosed for detecting an electrical pulse from a circuit and for generating an output signal in response to each pulse. The transducer includes a first electric coil having two ends adapted for connection with the circuit and a second electric coil having two ends on which the output signal is generated. The coils are coaxially wound together and a rod constructed of a ferromagnetic material is positioned through the rod. A housing also constructed of a ferromagnetic material includes two spaced end portions which contact the opposite ends of the rod. The housing also includes locking tabs which engage and lock the housing to opposite ends of the rod.

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

Abstract: The rotary transformer (1) has an inner core portion (3) which is enclosed by an outer core portion (5). The core portions (3, 5) are formed as hollow bodies of revolution of a ferromagnetic material which are rotatable with respect to one another about a common axis (9) and wherebetween an air gap (7) is present. The facing surfaces (11, 13) of the core portions (3, 5) are constructed as double conical surfaces whose bases (23, 25) face one another. In the conical surfaces (11, 13) there are provided first recesses (15) which are shaped as a staircase with substantially flat steps (19) on which transformer windings (21) are provided. The first recesses (15) in the inner core portion (3) are situated opposite first recesses (15) in the outer core portion (5), thus forming a winding chamber (17), windings (21) on the first core portion (3) cooperating with oppositely situated windings (21) on the outer core portion (5). The outer core portion (5) consists of at least two parts.

Abstract: A line filter arranged in such a manner that a foil conductors are used as the coil conductor and the shield plate, and a reactor is formed therein by laminating and winding the foil conductor and the shield plate with an insulating material held therebetween. A line filter arranged in such a manner that a pair of coil blocks connected to each other in parallel is provided on the iron core leg is included in the scope of the invention. Each of the coil blocks is structured in such a manner that the coil conductor and the shield plate made of the foil conductors are stacked and wound via the insulating material. A structure is included within the scope of the invention, the structure having a plurality of filter mechanisms connected to one another in series, each of the filter mechanisms being constituted by a pair of coil blocks connected to each other in parallel.