Abstract: A pressure switch 1 of this invention comprises a base electrode 2, a terminal 3, a disc 4 and a diaphragm 5. The base electrode 2 has a switching chamber 7 for inserting the contact part 3a of the terminal 3. The switching chamber 7 is sealed with an insulation member at one side. The disc 4 is formed so as to be able to contact with the contact part 3a of the terminal while it is connected to the base electrode 2 and to be able to inverse under a predetermined magnitude of pressure. The diaphragm 5 is made of a metal and is fixed to the base electrode 2 so as to keep vacuum of the switching chamber 7 including the contact part 3a and the disc 4 by sealing the opening of the switch chamber 7 at other side.

Abstract: A powder core is obtained by compaction-forming magnetic powder. The magnetic powder is an alloy comprising 1-10 wt % Si, 0.1-1.0 wt % O, and balance Fe. An insulator comprising SiO2 and MgO as main components is interposed between powder particles having a particle size of 150 &mgr;m or less.

Abstract: A control device for a contactor, in particular for scrolling through a menu which allows appliances in a motor vehicle to be controlled. The control device comprises a control key (36) mounted pivoting on a support, at least one contactor (4), and a tie bar (20, 22) interposed between the key (36) and each contactor (4). A, preferably transparent, transmitter (16) is formed by a supporting structure (18) and at least one tie bar (20, 22). The tie bars are connected to the supporting structure by at least one flexible arm so as to transmit to the contactor an action performed on the key (36). The supporting structure (18) serves as a support and a pivot for the control key (36).

Abstract: A low cost method of making a high impedance electrical transformer is disclosed as well as products of such method. The method comprises adding a step during the process of winding a transformer component which imparts higher impedance to the transformer employing such component by causing a portion of the total magnetic flux flowing therein to be shunted through a shunt of transformer steel. Such added step includes placing such shunt against a side of the primary coil and winding the secondary coil around both the shunt and the primary coil and also includes using the same coil form on which the primary coil was wound for winding the secondary coil. Such added step produces a high impedance transformer at a significant cost reduction over prior art methods of making a high impedance transformer.

Abstract: A coil layer, and a magnetic layer covering the coil layer via an insulating layer are provided. The magnetic layer comprises at least two magnetic films in lamination. There is adopted an inductive element including a combination of magnetic films in which, for any two magnetic films forming the magnetic layer, the value of product of multiplication of magnetic permeability and thickness of a magnetic film close to the coil layer is smaller than the value of product of multiplication of magnetic permeability and thickness of a magnetic film distant from the coil layer. This inductive element permits improvement of the superposed DC current characteristic and prevention of a decrease in inductance because magnetic fluxes generated from the coil layer are induced to a magnetic film distant from the coil layer.

Abstract: A transformer includes a ferrite base plate having a chamber for receiving a winding and one or more further windings which may be coupled to a ground. The windings are electrically coupled together, and separated from each other by partitions. An insulating strap may be wound around the ferrite base plate, and engaged with the ground, for securing the ground to the ferrite base plate and for preventing the ground to the ferrite base plate from moving relative to the ferrite base plate. One or more conductive panels may be engaged between the partitions of the windings.

Abstract: A latch kit comprising a member with at least one hook end, a tension member, and a hook plate. The hook plate is connected to the member by a tension member. The kit is intended to be used in conjunction with an industrial circuit breaker which is secured in a cell by a catch plate. When the hook plate is attached to the circuit breaker, the hook end can be used to support the circuit breaker's catch plate handle in the open position so that the circuit breaker can be extracted from the cell.

Abstract: An inductor of the invention is obtained by forming conductors of a desired shape on bendable plate type support members, providing a slit in one end of each of the conductors, and a claw on the other end of each of the conductors, bending the plate type support members, engaging the slits and claws with each other so as to form windings on the support members and openings therein, and inserting magnetic cores through the openings.

Abstract: A small footprint power transformer constructed so as to exhibit improved heat dissipation characteristics and an enhanced flow of a cooling medium. The transformer construction achieves small footprint by superimposing the core legs with the windings in vertical relationship. Highly heat conductive plane dissipators are inserted between adjacent finished coil discs and extended beyond the winding structure, terminating in fins arranged to assure maximum heat transfer to a cooling medium flowing therepast resulting in substantial reduction of the temperature rise.

Abstract: A rotary variable differential transformer apparatus for determining angular position of a rotor includes a stator support structure, a first pair of magnetically permeable stator elements and a second pair of magnetically permeable stator elements. The first and second pairs of stator elements are connected via first and second connecting members, respectively and are substantially supported by the stator support structure. Circuitry for generating a position indicator signal, including an array of coils is coupled to the first and second pairs of stator elements. A rotor is mounted within the stator support structure and substantially surrounded by the first and second pairs of stator elements. The rotor has a magnetic flux conducting element mounted thereon, which couples each of the first and second pairs of magnetically permeable stator elements in a manner which varies in proportion to the angular position of the rotor.

Abstract: A current transformer for alternating current with direct current components is proposed, consisting of at least one transformer core with a primary winding and at least one secondary winding to which a burden resistor is connected in parallel and terminates a secondary circuit with low resistance. The transformer core comprises a closed ring core with no air gap produced from a strip made of an amorphous ferromagnetic alloy that is practically free from magnetostriction and has permeability &mgr;<1400. Particularly appropriate alloys for such a strip ring core have been shown to be cobalt-based alloys consisting essentially of the formula Coa(Fe1-xMnx)bNicXdSieBfCg. where X is at least one of the elements V, Nb, Ta, Cr, Mo, W, Ge and P, a-g are given in atomic % and whereby a, b, c, d, e, f, g and x satisfy the following conditions: 40≦a≦82; 2≦b≦10; 0≦c≦30; 0≦d≦5; 0≦e≦15; 7≦f≦26; 0≦g≦3; with 15≦d+e+f+g≦30 and 0≦x<1.

Abstract: A multi-channel output type transformer for outputting uniformly balanced voltage among multiple output channels. The transformer comprising a primary winding and a secondary winding that is wound round a winding shaft portion of a core. The secondary winding of the transformer is a flat cable belt comprising covered conductors corresponding to the number of output channels. The cable belts are arranged in parallel. A plane loop is formed by appropriately folding the flat cable belt, and the plane loop member is arranged to as to substantially orthogonally intersect the winding shaft of the core.

Abstract: A transformer comprises a first support carrying a primary winding and a second support carrying a partial secondary winding connected electrically to an electrical unit by way of conductive wires. A flange of the second support exhibits at least two indentations for receiving a conductive wire which are separated by a recess filled with insulating material.

Abstract: An ignition unit for at least two sparkplugs of an internal combustion engine, the unit being in the form of a box having therein a reception cavity receiving an electronic printed circuit, a plurality of mutually separate housings extending side by side transversely relative to the reception cavity, a separating partition disposed between the reception cavity and the housings which defines a through opening between each of the housings and the reception cavity, and a plurality of ignition coils, each mounted in a corresponding one of the housings. Each ignition coil is fitted with a primary connector including 1) a fixing member for fixing the ignition coil to the box to enable the ignition coil to be mounted in a corresponding one of the housings, and 2) connection terminals between the ignition coil and the printed circuit.

Abstract: A chip inductor has electrode layers, insulating layers disposed on the electrode layers, and an uppermost insulating layer all disposed on a ceramic board. An inorganic pigment such as a Co oxide or an Al oxide is added to the insulating layer at a concentration of from about 2% to about 20% by weight. Break grooves are formed in the form of a lattice on the insulating layer by a laser beam irradiation, and the board is divided along the grooves. By adding the inorganic pigment, the break grooves are effectively formed, and the mother board is divided accurately along the break grooves, such that a chip inductor having an increased L value and an increased Q value is produced.

Abstract: A balun-transformer, which is composed of a balun transition and an impedance matching circuit. Chemical etching is employed in the manufacturing process that is compatible with the common microwave circuit manufacturing process. Using the odd mode analysis and commercial microwave software to design the balun-transformer. It is more accurate and more efficient than the conventional method to make balun-transformer that it can only be designed by experience and experiments. These balun-transformers can be used in UHF and VHF band.

Abstract: A wound and laminated iron core is formed by winding a soft magnetic thin strip into a circular ring shape or elliptical ring shape. A coil is then wound around almost an entire outer periphery of the ring of wound and laminated iron core. A cross sectional shape of the wound and laminated iron core vertical to a peripheral direction of the ring is any one of: (i) a circular shape, (ii) an elliptical shape, (iii) a substantially regular polygon of at least 6 sides, (iv) a shape encircled by a pair of point-symmetrically positioned circular arcs or elliptical arcs with a nearly straight line connecting respective edges of the pair of circular arcs or elliptical arcs on both sides of the pair of circular arcs or elliptical arcs, and (v) a shape of a substantially regular polygon of at least 4 sides whose apexes comprise a circular arc or an elliptical arc.

Abstract: This invention relates to a method of cooling an immersed induction coil, such as an ionizing coil used in a vacuum processing chamber. The coil 10 may comprise a coiled hollow tube 11 through which coolant can flow when pumped by a pump 13. A valve 16 is provided so that air can be passed through the tube in either direction and the direction of flow is controlled by a controller 19, which acts on the valve 16. The rate of switching of the valve 16 can be determined by a process condition or by monitoring the temperature of the downstream coolant and/or the coil.

Abstract: In an ignition coil for an internal combustion engine, the primary coil and the secondary coil of the coil unit are fabricated of self-welding wire and fixed in a coil case by an elastic material and an ignition control circuit unit is fixed in the coil case by an elastic material. Similarly, the primary coil and the secondary coil are integrally joined by an adhesive. The terminal of the primary coil and the lead of the ignition control circuit unit are joined together by fusion and the joint is partially molded, while the terminal of the secondary coil and the terminal of a high-tension cord outlet are joined together by fusing and the joint is partially molded. Moreover, the coil case is provided with an inner cap such that the fusing and partial molding of the terminals can be conducted on the inner cap, thereby ensuring a high recycle rate and enabling efficient resource recovery and reuse.

Abstract: A lever switch includes a case, and a stationary contact, common contact, movable contact and lever which are disposed in the case. The movable contact is made up of elastic metal and includes a stationary portion, contact portion, and a curved portion located between the stationary portion and the contact portion. The stationary portion is connected to the common contact. The movable contact is disposed in a state of bending so that the contact portion may come in contact with or apart from the stationary contact. An operating portion is protruded from an opening, and a driving portion is located inside the case and abuts on the curved portion of the movable contact. When the operating portion is manipulated, the driving portion pushes the curved portion, and then the contact portion comes in contact with or apart from the stationary contact.