Abstract: A transformer includes a divided primary winding in an isolating transformer power supply circuit and a secondary winding between the parts of the primary winding, a magnetic core having an air gap, and a bobbin surrounding the core with the individual windings applied to it, the transformer has a row of terminal posts to which the windings are connected is designed so that the primary winding is divided into at least three partial windings. The, the secondary winding that is under the highest load for the longest period of time is divided into at least two partial windings, the partial windings of this load secondary winding are enclosed by two partial windings of the minimum of three partial windings of the primary winding on the bobbin, and optionally one or more additional secondary windings are arranged outside the winding structure of the partial windings of the primary winding and load secondary winding.

Abstract: Systems and methods are described for an integral button pivot bar. A palm sized computer that can be held in one hand and operated with a stylus held by another hand, includes: a connecting trunk; a first connecting member coupled to the connecting trunk; an independently actuatable button coupled to the first connecting member; a second connecting member coupled to the connecting trunk; a torsion bar connected to the second connecting member; and an independently actuatable rocking switch coupled to the second connecting member. The connecting trunk, the first connecting member, the independently actuatable button, the second connecting member, the torsion bar, and the independently actuatable rocking switch are all integrally formed and actuating the independently actuatable rocking switch does not affect the independently actuatable button.

Abstract: An electric coil is formed of alternate strip parts and remaining strip parts. The alternate strip parts comprise alternate ones among a row of strip parts formed from a sheet of electrical conductor material, the row of strip parts forming a continuous electrical conductor having a form of a series of alternating reverse directional bends, a middle part of each strip part of the alternate strip parts being aligned with one another in a first line. The remaining strip parts comprise remaining ones among the row of strip parts, a middle part of each part of the remaining strip parts being aligned with one another in a second line separated from the first line. In manufacturing the electric coil, a forming member is used. The forming member has comb teeth, the comb teeth of the forming member being used to press and thus separate the middle part of each strip part of the alternate strip parts from the middle part of each strip part of the remaining strip parts.

Abstract: A self-adjusting shelf mounted interconnect is disclosed including a bus connector having a series of electrical contacts to engage respective conductive strips of a first electrical bus that runs along a shelf carrying gondola. The self-adjusting interconnect is mounted below a shelf so that when the shelf is removably attached to the gondola, the contacts of the bus connector are automatically mated to the conductive strips of the electrical bus, whereby information transmitted from a remote computer to the first electrical bus can be transmitted to a second electrical bus that runs along the front of the shelf and to a particular one of a plurality of electronic price tag modules that are coupled to the second electrical bus to receive and display the information transmitted from the remote computer.

Abstract: A transformer (1) for a printed circuit board (2) is provided with physically separate flat metal windings (6) which are chosen to take the highest or the two highest currents handled by the transformer (1). The lower currents which will often include the power input to the primary are printed on the surfaces (3,4) of the printed circuit board (2). The flat metal windings (5) may be pre-assembled with the core halves (6,7).

Abstract: A method of forming a three-dimensional micro-coil on a substrate (10) is provided which consists of forming a first metal layer (14) on the substrate (10). The first metal layer (14) is partitioned into a first plurality of metal strips (16). A sacrificial layer (18) is formed on the first plurality of metal strips (16). A second metal layer (24) is formed on the sacrificial layer (18). The second metal layer (24) is then partitioned into a second plurality of metal strips (26) such that a continuous loop of metal is formed between the first plurality of metal strips (16) and the second plurality of metal strips (26). This continuous loop of metal defines windings for a three-dimensional micro-coil (28) with one side in contact with the substrate (10).

Abstract: A high voltage transformer having radiation ribs has a laminated core formed of a plurality of accumulated iron plates, first and second windings wound in the laminated core for converting an input voltage to a predetermined output voltage, and a plurality of radiation ribs formed in the accumulated direction of the plurality of iron plates on the outer periphery of the laminated core. The plurality of radiation ribs are formed as the plurality of iron plates are accumulated, by the accumulation of a plurality of protrusion portions formed along each of the plurality of iron plates. Since the radiation ribs are formed on the outer periphery and in the accumulated direction of the laminated core, all the iron plates constituting the laminated core have the same shape and are disposed in the same direction.

Abstract: A transformer including a bobbin formed by uniting a winding member, which has a primary winding and secondary winding and a bore formed thereon and therein, with a primary winding fixture and secondary winding fixture adjoining the openings of the bore, and a ferromagnetic core having a core portion thereof inserted into the bore and including an enclosure for enclosing the windings is manufactured according to a process including an affixing step of firmly affixing both or either of the primary winding fixture and secondary winding fixture to the ferromagnetic core, an impregnation step of impregnating the transformer with a varnish, and an applying step of applying adhesives.

Abstract: A method and apparatus for controlling the flow of signals by selectively switching signals to ground and allowing signals to pass through a signal line based a position of a conductive pad. The switch contains waveguides including the signal line and at least one ground plane. The conductive pad responds to an actuation voltage to electrically connect the signal line and the ground planes when the metal pad is located in a relaxed position. When not located in the relaxed position, the switch breaks the connection to allow signals to flow through the signal line unimpeded. Brackets guide the pad as the pad moves between the relaxed position and a stimulated position due to the actuation voltage, without substantially deforming the conductive pad.

Abstract: An electrical choke comprises a magnetic amorphous metal core having, in combination, a distributed gap and a discrete gap. The amorphous metal is an iron based, rapidly solidified alloy. The distributed gap configuration is achieved by subjecting the magnetic core to a heat treatment, causing partial crystallization of the amorphous alloy. Such partial volume crystallization reduces the permeability of the magnetic core from several thousands to a value ranging from 200 to 800. The discrete gap is introduced by cutting the core and inserting a spacer. Depending on the width of the gap and the value of the annealed permeability, effective permeabilities in the range of 200 to 40 can be achieved. Advantageously, the reduced permeability magnetic core maintains its initial permeability under DC bias field excitation and exhibits low core loss, making it especially suited for use in power factor correction applications.

Abstract: A planar electromagnetic device, such as a planar transformer or planar inductor, is provided with features for cooling that are formed integrally with the windings of the planar device. In a preferred embodiment the planar device uses winding layers (200) having fin portions (116). In a first alternative embodiment a helical winding (500) is formed from a winding stamping (400) having fin portions (412). In a second alternative embodiment, tube portions (802) are formed in a winding stamping (700) used to form a helical winding.

Abstract: A pulse signal generator comprises a magnetic element (1) capable of causing a large Barkhausen jump; a detector (2) provided relative to the magnetic element; a magnetic field generator (3) provided in vicinity of the magnetic element for applying a biasing magnetic field to the magnetic element for making a predetermined magnetization; and a magnetic circuit forming unit (4) provided in vicinity of the magnetic element for applying a main magnetic field to the magnetic element for causing a large Barkhausen jump in the magnetic element. The magnetic field generator is provided with magnetic field concentration means (32A) for concentrating the biasing magnetic field upon the magnetic element and the magnetic field adjusting means (74) for adjusting an intensity of the biasing magnetic field upon the magnetic element.

Abstract: A focus volume of an FBT (fly back transformer) focus unit and its coupling device are disclosed, in which a volume board is provided in a small size, but the voltage breakdown resisting strength is reinforced. At least one or more round resistor patterns 130 are formed on a volume board 120 which is installed within a focus volume 100 of the FBT focus unit 110. An opening 140 is formed within each of round portions of the resistor patterns 130, and a volume case 180 has a pair of isolating walls 160 within its interior 170, for being inserted into the opening 140 of the volume board 120. The volume case 180 is installed on a side of an FBT case 150. Thus the volume board is made to have a small size, but its voltage breakdown resisting strength is reinforced. Therefore, the filling of an epoxy resin is not required, thereby simplifying the manufacturing process, and making it easy to manufacture the product.

Abstract: A resistive temperature sensor is constituted by an insulating body mainly composed of alumina; and a temperature sensing resistor mainly composed of a conductive material containing a metal silicide. The insulating body and the temperature sensing resistor are laminated and sintered to form a lamination sintered body in which a resistance circuit is formed.

Abstract: To produce a coil device in which fewer components are required, a plurality of coils 20 are attached to an attachment base 10, leading wires 24 of each coil 20 being attached to terminal fittings 30A and 30B of a connector member 13, and a feeder connector C being fitted with the connector member 13. Electricity is distributed to each coil 20 along a path of feeder electric wires W, the feeder connector C, the connector member 13, and leading wires 24. The leading wires 24 of the plurality of coils 20 are attached as a single unit to the single connector member 13. Since the feeder connector C is attached to this connector member 13, fewer components are required compared to the case in which each coil 20 is provided with an individual connector member.

Abstract: A connector for use with a circuit substrate having a plurality of elongated conductors. A solder ball is fused to the end of the conductors for connection of the connector to a circuit substrate. Method for attaching the solder ball to the end of the conductors using a solder paste with or without a preformed solder ball. The conductors are fitted into passages of an interface member. A tail end of each conductor terminates in a well in a surface of the interface member that facilitates the attachment of solder ball to the end of the conductors. The passages in the interface member hold the conductor tail ends in place while providing a clearance around the conductor to accommodate the effects of thermal expansion and contraction.

Abstract: In a method of controlling a disk driving motor having a rotor to which disks are loaded, an improvement comprises the step of, when the recording/reproducing is performed with respect to a disk, rotating the rotor in a reverse direction by one of a predetermined rotational angle and for a predetermined time during the period from the time the rotor stops rotating in a normal direction to the time the rotor is again driven in the normal direction. A control device for a disk driving motor in accordance with the method is also disclosed.

Abstract: A key switch arrangement comprises a key cap, a key switch subassembly pivotally mounted to a bottom surface of the key cap, a circuit membrane under the key switch subassembly and forming a switch electrode thereon, a rubber member disposed between the key switch subassembly and the circuit membrane and forming a rubber cone for triggering the switch electrode when the key cap is compressed by an external force, and a supporting plate defining an opening therein. Engaging means is insert molded into the opening of the supporting plate, and comprises a pair of first and second engaging arms for pivotally engaging with the key switch subassembly.

Abstract: An improved structure of tact switch comprises a seat body, a first elastic element, a press set, and a closure body. After assembling and jointing the first elastic element and the press set in the seat body, the assembly procedure is to couple the closure body onto the seat body. When the press set is pressed down by an external force, it will in turn press the first elastic element downwards to make connection between a first conductive electrode and a pair of second conductive electrodes.

Abstract: An improved multiple-width keyswitch capable of inhibiting noise thereof induced during operation is provided. The multiple-width keyswitch includes a keycap and a substrate. During operation, the keycap moves vertically relative to the substrate. The keycap defines a lower surface which is provided with a plurality of bosses. The substrate is provided with a plurality of openings. Each of the plurality of openings is disposed under one corresponding boss and covered with a deformable layer. When the keycap moves downward to turn on the keyswitch, each of the bosses first impacts the deformable layer into the corresponding opening such that the impact energy of the keycap is absorbed by the deformable layer. Thereby the noise induced by the impact of the keycap can be effectively inhibited. Embodiments and equivalent modifications of the invention are described in detail in the specification.