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: 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: A high-voltage transformer winding bobbin made from a heat-resisting, insulative plastic material through the process of injection molding, which includes a plurality of square flanges equidistantly spaced around the hollow, cylindrical, square body thereof and a plurality of winding grooves respectively defined between each two adjacent square flanges for winding an enamel wire, wherein the square flanges except the last one, have each a V-shaped wire guiding notch on a respective peripheral edge. The V-shaped wire guiding notches on the square flanges are respectively aligned for guiding an enamel wire into each winding groove. In an alternate form, the V-shaped wire guiding notches on the square flanges of odd numbers are aligned and respectively disposed diagonal to the V-shaped wire guiding notches on the square flanges of even numbers.

Abstract: A single core triaxial flux-gate magnetometer including a tall-toroidal core having a radial excitation winding, two orthogonal sets of axial or circumferential output windings, and an equatorial output winding oriented orthogonal to both axial output windings. The core is fabricated from a strip of magnetic tape material wrapped to form a toroid having a height ranging from approximately equal to its diameter to one and one half times its diameter. Each end of the strip is uniformly tapered along the top and bottom edges such that the tapered segments extend around an integer multiple of complete revolutions of the wrapping, the length of each tapered segment thereby being equal to the inner or outer circumference of the toroid or an integer multiple thereof.

Abstract: A transformer with a primary and a secondary core. The primary core is rectangular in shape with guide slots on the inside in the center of opposite legs and windings wound in opposition on the other two sides. The secondary core is rectangular in shape consisting of two V' shaped parts. A power end and a bypass end. The two legs of the secondary power core are shaped into a closed V' and the two legs of the secondary bypass core are shaped into an open V' to allow the legs of the bypass and power core halves to mesh. These two half cores are separated by a diamagnetic strip and bonded together with a low magnetic bonding agent. The power end of the secondary core contains the secondary windings. The complete secondary core is then inserted at a right angle through the guide slots in the primary core.

Abstract: This transformer core comprises superposed groups of amorphous steel strip wrapped about the core window, each group comprising an inner section and an outer section disposed in superposed relationship, and each section comprising many thin layers of amorphous steel strip. Each of the layers in a section has a length dimension measured between the transversely-extending edges of the layer located at opposite ends of the section. The layers in the inner section of a group have substantially equal lengths, and the layers in the outer section of said group have substantially equal lengths of a greater value than the lengths of the layers in the inner section. At one end of each group the transversely-extending edges of all the layers in said group are substantially aligned to form a smooth edge.

Abstract: A substation transformer is disclosed which includes a winding, a winding compression ring, which closes off the winding, a compression beam, and expanding spring elements. The expanding spring elements are disposed concentrically around a core portion of the winding, and are placed between the compression beam and the winding compression ring. Each of the spring elements includes a spring, a bushing receiving a spring, and a compression piston which has been provided to close an open end of the bushing. The compression piston is adapted to limit movement of the spring. A post-installation modification mechanism is provided which includes a compression mechanism for compressing the winding. The compression mechanism comprises hydraulic cylinders adapted to be removably inserted between the compression beam and the winding compression ring.

Abstract: A transformer bobbin is provided comprising a frame of approximately a rectangular shape, a first wall arranged on one end of the frame, a second wall arranged on the other end of the frame, and a center wall arranged between the first wall and the second wall. The frame, the first wall, and the center wall constitute in combination a primary winding section. The frame, the center wall, and the second wall constitute in combination a secondary winding section. In particular, the primary winding section has a container case detachably mounted thereto for selective assignment for use. Also, the container is arranged for accommodating a current disconnecting means for deenergizing a transformer circuit when the coil temperature increases up to a limit level.

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 magnetic core (2) is formed so as to be vertically thin and segmentable into an upper segment (3) and a lower segment (4). An inner portion (2a) and two outer portions (2b), (2b) of the magnetic core (2) are interconnected so as to form a closed magnetic circuit. A substrate (9) is inserted between the two outer portions (2b), (2b), while the inner portion (2a) is inserted into a through hole (10) of the substrate (9). A scroll pattern coil (11) is formed on each of front surface (9a) and rear surface (9b) of the substrate (9) outside the through hole (10). Further, a bobbinless winding coil (13) is inserted into an annular space between the inner portion (2a) and the through hole (10).

Abstract: A transformer or power supply apparatus as well as a method for making the same is provided. A coil assembly, including a bobbin (10 or 62), windings (30, 31), and terminals (27), retains core laminations (14) forming a transformer or power supply assembly. The assembly is placed within injection molding molds and a thermoplastic or thermosetting material is injection molded to partially or fully encapsulate the assembly, producing an improved transformer or power supply structure.

Abstract: The present invention provides a coil device including magnetic cores having gap regions and a coil wound to contain the gap regions. The present invention provides an improvement in which a shape of at least one of the opposing magnetic cores forming the gap regions is formed into a curve of logarithmic function from its base end to its extreme end, its most extreme end is provided with a gap adjusting flat surface and then a plurality of gaps are formed in the gap regions.With such an arrangement as above, the present invention provides the coil device capable of reducing a leakage magnetic flux produced around the gaps, preventing an abnormal generation of heat of the coils and further preventing a bad influence of noise against a peripheral apparatus.

Abstract: A method for making a search coil frame assembly for a metal detector, the method comprising providing a plurality of frame members, each having an aperture therethrough, providing selected ones of the frame members, respectively, with first, second and third grooves in face surfaces thereof, the grooves being formed so as to extend substantially around the apertures and to an edge of the frame member, placing electrically conductive strands in the grooves, and bonding the frame members together to close the grooves with the strands therein, the grooves being disposed such that the first and third grooves are spaced from the second groove by substantially equal distances on opposite sides of the second groove, the apertures forming a passage through the bonded frame members, and the strands substantially encircling the passage and extending from the frame; and the search coil frame assembly made in accordance with the aforesaid method.

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 high-frequency inductor comprising an insulating substrate; and a conductive land formed on the insulating substrate, the conductive land comprising at least two thin films formed of different compositions of metals, each of the metals is to be etched by such an etching agent that substantially never removes the other metals, the thin films being accumulated vertically.

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 wound core, around which electric wires are wound by rotating cylindrical bobbins attached. At least one of a winding start portion and a winding end portion is formed into a trapezoidal cross-sectional shape and the other portion is formed into a circular cross-sectional shape, forming a gap between the trapezoidal cross-sectional shape portion and the bobbin. The rotation of the bobbin without scratch is assured even if the wound core is formed slightly deformed. In cutting-off the material, since the magnitude of the directional change of the cutting tool is decreased at the trailing end and the leading end of the material, the cutting speed is improved.

Abstract: A monolithic magnetic device having a plurality of transformer elements having single turn primaries and single turn secondaries fabricated on a plate of ferrite which has the outline of a ceramic leadless chip carrier. Each of the magnetic elements has a primary winding formed from a copper via plated on the ferrite. Each element's secondary is another copper via plated over an insulating layer formed over the first layer of copper. The elements' primaries are interconnected on the first copper layer and the elements' secondaries are interconnected on the second copper layer. The configuration and turns ratio of the transformer are determined by the series and or parallel interconnections of the primary and secondaries. Some of the interconnections can be provided by the next higher assembly level through the circuit card, with the same magnetic device providing many turns ratio combinations or values of inductors.

Abstract: An object of the present invention is to provide a structure for a choke coil which facilitates making choke coils more compact, thinner and easier to manufacture. The structure uses a band-shaped conductor, the terminal portions at both ends are fixed in a terminal fixing plate provided to one end of the winding portion of a bobbin.

Abstract: A core-form transformer winding with liquid coolant flow diversion bands is disclosed. The apparatus includes a winding tube with a central longitudinal axis. A number of coil sections are axially displaced along the central longitudinal axis of the winding tube. Radial ducts are formed between the coil sections. Internal vertical ducts are formed within each of the coil sections. A liquid coolant is used to cool the windings during operation. Flow diversion bands are placed around every other coil section. The flow diversion bands generate a partial blockage of the liquid coolant, which produces a radial flow into one or more of the radial ducts, resulting in vertical flow through the internal vertical ducts.