Abstract: In an integrated circuit, such as an RF oscillator device, having multiple mutually separated levels of electrically conducting material, each level comprises a plurality of adjacently arranged strips separated from another. Strips of different levels are electrically parallel connected, forming a plurality of stacks of parallel connected strips. The stacks are connected to form an inductor having a first and second terminal.

Abstract: A single-phase three-wire type transformer which forms secondary coils by duplex coils winding two conductors in parallel according to the division intersection connection and can reduce currents circulating inside of a circuit of the transformer, thereby reducing the loss in the transformer. Coils A and B are formed in two opposing locations of a core (1). The coils A and B are configured so that two secondary coils and a primary coil are overlapped and wound in sequence from the inside of the core (1) in three layers, respectively. Each of the secondary coils provided by winding two conductors of small diameter in parallel condition on the core (1). One duplex coil connects the two parallel winding conductors in series with the other duplex coil, i.e.

Abstract: A wideband audio output transformer for use with a push-pull vacuum tube amplifier using a multifilar ribbon in which primary windings and secondary windings coexist. The multifilar ribbon is wound continuously around a common core side by side to form successive layers. The primary windings are connected in series by turning the multifilar ribbon after the layers of multifilar ribbon have been wound and connecting the trailing end of the multifilar ribbon to the beginning end of the multifilar ribbon. Two additional wires are added in parallel with wires of the primary windings in the multifilar ribbon to redistribute the effective capacitance throughout the windings. The winding scheme eliminates the signal imbalance of an output transformer with a balanced push-pull primary winding and an unbalanced secondary winding at high frequencies.

Abstract: A winding core is formed by extruding a kneaded material to be obtained by kneading a powdered magnetic material and a binder. A plurality of bundled conducting wires are wound around the winding core into a coiled shape. An external cover element is formed by extruding the kneaded material to enclose the plurality of conducting wires. The winding core and the external cover element are sintered such that the plurality of bundled conducting wires wound around the core into a coiled shape are deformed into a zigzag manner by the stress due to shrinkage of the external cover element at the time of sintering thereof. The partially manufactured product obtained by the preceding steps, is cut into a predetermined length to thereby obtain a plurality of chip inductor main bodies. An external electrode is formed on each of end surfaces of the respective chip inductor main bodies. The external electrode is connected to each end portion of the conducting wires.

Abstract: An integrated magnetic exploding foil initiator fire set includes a DC-DC converter with a first transformer, a triggering mechanism with a second transformer, and an integrated magnetic structure for the respective transformers. Inductive interference is minimized in the respective transformers by the construction and placement of the transformer windings. The use of planar magnetic core material and flexprint or printed circuit technologies for the windings reduces the cost and weight of the structure and provides a compact construction. Thus, the triggering mechanism provides higher energy and voltage output and eliminate the need for expensive spark-gap switches.

Abstract: Main and supplemental windings are combined in a toroidal inductor to subntially nullify Lorentz Forces on the main winding and the magnetic field thereof which passes externally from the inductor.

Abstract: The internal and/or external magnetic fields of a coil are nullified to ad structurally detrimental Lorentz Forces and/or environmentally hazardous magnetic fields, in accordance with preestablished design objectives.

Abstract: An output transformer for use with a push-pull vacuum tube amplifier using a multifilar ribbon in which primary windings and secondary windings co-exist. The multifilar ribbon is wound continuously around a common core side-by-side to form successive layers. The primary windings are connected in series by turning the multifilar ribbon after the layers of multifilar ribbon have been wound and connecting the turned end of the multifilar ribbon to the beginning end of the multifilar ribbon. The winding scheme increases the coupling between the first half primary, the second half primary and the secondary without reducing performance at high frequencies. The secondary windings are connected in series or in parallel to obtain the proper turns ratio for the transformer. A method of interconnecting the secondary windings for different turns ratios is also provided.

Abstract: A monolithic high-Q inductor structure is formed with multiple metalization levels in a conventional integrated circuit technology in which inductor turns utilize these multiple levels to reduce the inductor resistance. Inductors with Q values above five can be integrated with this approach at radio and microwave frequencies.

Abstract: An air core reactor of the type having a plurality of coaxial coil windings connected electrically in parallel by structurally rigid spiders at opposite ends of the reactor. There are two electrically conductive spiders at least one end of the reactor. Selected ones of the coil windings are connected to one of the two spiders and further selected ones of the coil windings are connected to the other of the spiders at the one end. In the preferred form the windings connecterd offset from one another around the coaxially disposed coils. In a further preferred embodiment, there are two electrically conductive spiders at each of opposite ends of the coaxial coils. In a still further preferred form, at least some of the coil windings are wound at least two conductors high with the same number of turns and wherein the ends of said two conductors are circumferentially offset from one another by preferably 180.degree..

Abstract: Improved electric induction heating apparatus wherein the coil has two or more windings of special low loss conductor with such windings electrically connected in parallel. The two or more windings can be wound simultaneously one on top of the other and/or disposed radially one outside of the other. The coil windings embedded in a rigid set resinous material thus providing a rigid cylindrical unit. At least one of the coil windings has the low loss conductor around a tube the latter providing a fluid flow path for circulatig cooling fluid therethrough by at least one of current balancing transformers, transposition of the windings, and appropriately choosing the number of turns of each coil layer. A split ring bus can be used at the ends of the coils to connect the windings in parallel and laminated steel yokes can be disposed about the coil.

Abstract: A high-voltage winding for core-form power transformers is disclosed that uses two different conductor configurations within a single coil to minimize eddy current losses. The winding includes a first elongated conductor bundle formed from a plurality of thin enamel coated conductor ribbons arranged in side by side relation. A plurality of second elongated conductor bundles are each formed from at least one bundle section having a multiplicity of elongated insulated conductor strands arranged in side by side relation. Each of the conductor strands is less than 40 mils thick. The coil includes a top end section, a body section and a bottom end section. The body section is spirally wound with the first conductor bundle. The top and bottom end sections are wound with the second conductor bundles. In windings that include tap connectors, the tap section is also wound with one of the second conductor bundles.

Abstract: A high voltage electrical winding for shell form transformers is disclosed that reduces eddy current and circulating current losses within the winding. The winding is fabricated from an elongated conductor bundle that is spirally wound into a plurality of turns. The conductor bundle is formed from a multiplicity of enamel coated elongated conductor strands arranged in side by side relation. Each of the conductor strands has a rectangular cross section with a thickness of less than approximately 40 mils between contacting surfaces. The strand's cross sectional height is preferably less than 120 mils. The conductor strands are mounted side by side such that their respective contact surfaces abut. The conductor bundle is preferably wrapped in an adhesive tape to give the bundle some structural support and to provide insulation between winding turns. The disclosed winding also has very good mechanical strength and impulse distribution.

Abstract: The secondary winding of a high power transformer for clocked power supplies is composed of a plurality of skeins extending parallel to one another which are, in turn, constructed of a plurality of stranded conductors extending parallel to one another, whereby the stranded conductors are composed of wire-shaped individual conductors respectively provided with an insulating surface and twisted or woven with one another. All stranded conductors are electrically and mechanically connected to one another at both ends of their respective skeins and all skeins are connected to one another at one end of the secondary winding and connected to one another across respective rectifiers at the other end thereof.

Abstract: Method and device for measuring two orthogonal electromagnetic field components using a cross coil and for evaluating the components in the distance measurement in electronically course-steered vehicles (13). For rapid and ensured detection of malfunctions of the distance measuring system, use is made of an antenna effecting concurrent positionally and timewise measurements, and with the coils each consisting of bifilar or trifilar coil wires representing a redundant measuring system. A monitoring unit is used to continuously compare the signals generated by the various wires of the antenna when scanning the magnetic field. When a malfunction occurs in one of the channels, vehicle steering control is continued by the respective other channel and the defect is indicated via the monitoring unit. As monitoring signals, use can also be made of direct currents superimposed in the coils.

Abstract: Secondary winding configurations and methods particularly applicable for toroid transformers are described for winding secondary windings over the indexed primary winding and toroidal core. The secondary winding is formed in the configuration of a multifilar winding of a plurality of coplanar parallel filaments with a first elongate strip of electrically insulating material bonded to the filaments on one side and a second elongate strip of electrically insulating material bonded to the filaments on the other side and to the first elongate strip. The resulting electrically insulated multifilar strap winding contains the filaments in substantially parallel coplanar relationship. The multifilar strap winding is wound around the toroidal core in substantially equally spaced turns. The strap winding maintains the filaments substantially in equally spaced relationship relative to each other over irregular surfaces and compound curvature of the toroidal core without crossover.

Abstract: A disc coil winding of interwound coils is formed of winding conductors covered with normal insulation, the winding having a radially inner and a radially outer surface. A plurality of the coils are disposed at an input to the winding, and have respective turns thereof located at the inner and the outer surface of the winding as well as respective turns thereof located radially adjacent thereto. Supplemental insulations are provided for reinforcing the normal insulation, the supplemental insulations extending from respective starting locations both between the turn located at the inner surface and the turn adjacent thereto as well as between the turn located at the outer surface and the turn adjacent thereto for protecting at least one edge of the respective turns. The coils have a turn capacitance between respective turns thereof free of the supplemental insulations which is greater than the turn capacitance between the respective turns thereof provided with the supplemental insulations.

Abstract: Conductor bundles for the concentric coils of a dry inductor having no iron core. The coils define cooling air gaps therebetween, adjacent ones of the coils being electrically connected in parallel and each coil being comprised of turns of a conductor bundle of the same rectangular cross section, the coils having different numbers of said turns. The conductor bundles form the turns of the coils and comprise a plurality of conductors electrically insulated from each other and twisted together, the conductor bundles of all coils are structurally identical with respect to the number and cross-sectional dimension of the conductors, and the rectangular cross sections of the conductor bundles forming respective coils have different cross-sectional dimensions in the axial direction of the respective coil whereby the coils have the same dimension in said axial direction while the number of the turns of the coils differs.

Abstract: A power transformer characterized by inner and outer low voltage winding sections and a high voltage winding section disposed therebetween. The low voltage windings are comprised of a plurality of pancake coils, and the high voltage winding are comprised of a plurality of conductor strands spirally wound for a plurality of coil layers. The low and high voltage winding sections are laterally spaced with the low voltage windings disposed in side-by-side positions and adjacent to the high voltage windings. The high voltage windings having a smaller turn height than the low voltage windings and having conductor strands of smaller gauge than the pancake coils of the low voltage windings.

Abstract: A heat shrunken polymeric material is wrapped around a plurality of adhesive coated, insulated wire strands juxtaposed in a transposed configuration to compact the metal strands into intersurface contacting relation, and thus promote improved bonding together of the metal strands for enhanced short circuit withstand.

Abstract: A high frequency induction heating apparatus for heating articles where the apparatus has a heating station, a source of high frequency current including a vacuum tube oscillator means and a plurality of high frequency electric conductors which extend through the heating station and which are connected to the source and to ground. The conductors are series connected such that one-half of the conductors form inflow conductors positioned adjacent one another in one-half of the heating station and the remaining one-half of the conductors form outflow conductors positioned adjacent one another in the remaining one-half of the heating station. Conductors connected closer to the source are positioned further from the article to be heated than conductors connected closer to ground in order to prevent dielectric breakdown between the conductors and the article to be heated.

Abstract: A regulating winding for a high power transformer which includes a conductor bunch having a multiplicity of series-connected, parallel conductor loops, each loop comprising at least two parallel loop strands. The conductor bunch includes a number of radial and/or axial cooling channels, and the loop strands and the cooling channels are so arranged that the voltage difference between two loop strands located adjacent each other, and preferably positioned together between two cooling channels, is considerably higher than the voltage difference between loop strands positioned on either side of the cooling channels.

Abstract: Current distribution between parallel-connected, coaxial, helical coils is determined by rectangular conductors having a selected radial thickness and longitudinal widths so that each coil carries the desired current. First adjacent ends of all of the coils are connected together at the same physical location by a first common terminal, and second adjacent ends of all of the coils are connected together at the same physical location by a second common terminal. The rectangular conductors facilitate winding and supporting coaxial coils, and different conductor widths and winding pitches permit each coil to be designed so that it has the desired characteristics and importantly so that it carries the desired current.

Abstract: Secondary winding configurations and methods particularly applicable for toroid transformers are described for winding secondary windings over the indexed primary winding and toroidal core. The secondary winding is formed in the configuration of a multifilar winding of a plurality of coplanar parallel filaments with a first elongate strip of electrically insulating material bonded to the filaments on one side and a second elongate strip of electrically insulating material bonded to the filaments on the other side and to the first elongate strip. The resulting electrically insulated multifilar strap winding contains the filaments in substantially parallel coplanar relationship. The mulfifilar strap winding is wound around the toroidal core in substantially equally spaced turns. The strap winding maintains the filaments substantially in equally spaced relationship relative to each other over irregular surfaces and compound curvature of the toroidal core without crossover.

Abstract: A ceramic fiber mat attached to the interior wall or surface of a high temperature chamber or furnace or adapted to overlie an intermediate insulating member positioned between the mat and a furnace wall, the fibers in the mat lying in planes generally perpendicular to the wall, the mat constituting an improved insulation for the wall where the interior of the chamber or furnace will be operating at temperatures in excess of 1600.degree. F.