Abstract: A laminated inductor used for micro-miniaturized high frequency circuit includes insulating layers and conductive patterns alternately superimposed with each other, and the end of each conductive pattern is connected with each other to form a coil 3 in a laminated form. The starting end and terminal end of the coil 3 are connected with terminal electrodes 4, 5 at the opposed ends of the chip. The terminal electrodes 4, 5 are formed on, exception the side surface of the chip, the end surface and the lower surface of the chip or otherwise the end surface and upper and lower surfaces of the chip. This structure can minimize an adjacent portion between the coil 3 and the terminal electrodes 4, 5 so that a stray capacitance can be reduced. Thus, a high resonant frequency can be obtained for high frequency applications.

Abstract: There is provided a Faraday rotation angle varying device in which external magnetic fields are applied from at least two directions to a garnet single crystal having a Faraday effect and a synthesized magnetic field is varied so that Faraday rotation angle of light which transmits through the garnet single crystal is controlled. The device has a base film of garnet single crystal having a rotation angle varied in accordance with variation of a synthesized magnetic field, and a compensating film of a garnet single crystal having a constant Faraday rotation angle. The base film has a wavelength coefficient sign and the compensating film has a wavelength coefficient sign which is different from that of the base film, so that a wavelength variation component of the Faraday rotation angle of the base film is reduced by the compensating film. For example, a fixed magnetic field parallel to a light direction is applied by permanent magnets and a variable magnetic field is applied by an electromagnet.

Abstract: Disclosed is a Faraday rotator capable of reducing the temperature dependence on a Faraday rotation angle, thereby enhancing the temperature characteristic, particularly, in a service environment in which the magnetization direction is variable, and an optical device using the Faraday rotator. The Faraday rotator includes a Faraday element which rotates the polarization plane of polarized light rays passing through the Faraday element when an external magnetic field is applied to the Faraday element.

Abstract: A new separator for an alkaline cell is provided, which can prevent deformation to an end of the separator and also prevent short circuits within the cell structure when an external force is added to the cell. The separator has a characteristic that a ratio of a tensile strength of a longitudinal direction of a separator base paper and a tensile strength of a widthwise direction of the base paper is within a range of 2/1 to 1/1. The invention provides a new method of producing the separator. The method permits reliability in sealing properties of a closed bottom end and high productivity. The method has the steps of: winding the base paper to form a cylindrical body; subjecting the cylindrical body to a closed bottom forming step while the cylindrical body is held by a clamping device to maintain its cylindrical shape; heat-bonding an end of the cylindrical body to close the end; and releasing the cylindrical body from the cylindrical clamping device.

Abstract: A coil device includes a coil body with a wiring coil wound therearound. The coil body is composed of an insulative core cover with a core received therein. An insulative base is provided with terminals, which the coil body is to be mounted thereon. The core cover includes a planar support portion to be attached to the base, and one of the support portion and the base has, at areas in the vicinity of opposite end portions thereof, engagement grooves, and the other has, at areas in the vicinity of opposite ends thereof, ridges engageable with the engagement grooves. Thus, the support portion can be engaged with the base through a combination of the engagement grooves and the ridges.

Abstract: A twin-core ferrule structure is provided which is miniaturized in size, facilitated for accurate positioning the optical axes of two optical fibers, and improved both in degree of freedom of determining a shape and in high-volume productivity.

Abstract: A Faraday rotation angle varying apparatus for controlling a Faraday rotation angle of a light beam passing through a garnet single crystal having a Faraday effect by applying external magnetic fields to the garnet single crystal in two or more of directions and varying a synthetic magnetic field synthesized from the external magnetic fields is disclosed. According to an aspect of the present invention, the garnet single crystal has the (111) plane polished and the light beam is allowed to pass through the garnet single crystal along the <111> direction of the garnet single crystal perpendicular to the (111) plane. A displacement path of a synthetic vector of the external magnetic fields is within a fan-shaped range (peripheral lines of the fan-shape inclusive) of a stereographic projection chart of the garnet single crystal with the (111) plane taken as the center of the chart.

Abstract: A ringing choke converter capable of reducing the variation in a switching frequency to a low level even if the variation in load is large is disclosed. The ringing choke converter also serves for improvement of efficiency and solution of noise-problems. A ringing choke converter comprises a turn-on control system which detects the turn-off of the switching transistor Q1, and forcedly turns on the switching transistor Q1 after a predetermined amount of time. This turn-on control system comprises a conductive-type controlling transistor Q3 which is a different type from the switching transistor Q1, a resistance R3, and a capacitor C3. The collector of the controlling transistor Q3 is connected to the connecting point between the resistance R2 and the capacitor C2. The emitter of the transistor Q3 is connected to one end of the base winding L3. The resistance R3 is connected between the base of the transistor Q3 and the other end of the base winding L3.

Abstract: A sheet transformer wherein a coil pattern is formed on each of substrates so as to constitute a coil substrate, a plurality of the coil substrates are overlaid in multiple layers to form a primary coil and a secondary coil. The primary coil and the secondary coil are overlaid such that the middle leg cores of EE type, EI type, EER type or EIR type cores are disposed in the center of the coils and both the outside leg cores are disposed outside the coils, thereby obtaining a magnetic coupling between the coils. A higher potential side of the primary coil and a higher potential side of the secondary coil are disposed in an opposed configuration so as to face each other.

Abstract: A high frequency sheet-type transformer coil structure capable of minimizing eddy current generated by parallel winding and raising power conversion efficiency when the high frequency sheet-type transformer uses sheet-like coils arranged such that a coil on a first surface and a coil on a second surface have a reverse winding order.

Abstract: Disclosed is a magneto-optical element material composed of a magnetic garnet single crystal which is small in temperature dependency of a Faraday rotation angle, capable of being formed into a film by the LPE, and significantly small in wavelength dependency of a Faraday rotation angle in a specific composition region defined by. The magneto-optical element material is composed of a magnetic garnet single crystal expressed by a composition formula of R.sub.3-x Bi.sub.x Fe.sub.5-v-w-y Ma.sub.v Mb.sub.w Co.sub.y O.sub.12 where R indicates a rare earth element including yttrium, Ma is a trivalent cationic element, and Mb is a tetravalent cationic element; and x, y, v and w satisfy relationships of 0.6.ltoreq.x.ltoreq.1.9, 0.01.ltoreq.y.ltoreq.0.47, 260y-88x+45.ltoreq.0, 500y-30x+37.ltoreq.0, 0.ltoreq.v.ltoreq.1.0, and 0.ltoreq.w.ltoreq.0.35. The material satisfying the following relationships of 0.01.ltoreq.y.ltoreq.0.28 and 800y-130x+45.ltoreq.

Abstract: An over-discharge prevention apparatus comprising:a voltage detection device 2 for detecting electric voltages of both ends of a electric storage element (B) and outputting a discharge finishing signal (PFD) when a discharge extinction voltage (VL) is detected;a discharge controlling device 3 for delaying the detected output of the voltage detection device 2 for a predetermined time (Td); anda switching device 1 connected in series with the electric storage element (B), the switching device being set to an OFF state by a delay signal of the discharge controlling device.

Abstract: A dielectric filter includes a laminate substrate formed by laminating and bonding a plurality of dielectric sheets, belt-like resonance electrodes formed on predetermined bond surfaces of the dielectric sheets, input/output electrodes formed at predetermined positions of an outer periphery of the laminate substrate and connected to the belt-like resonance electrodes, and earth electrodes formed on the outer periphery of the laminate substrate under a non-connection state with the input/output electrodes. The end portions of the belt-like resonance electrodes extend to both side surfaces of the laminate substrate. One end of each belt-like resonance electrode is connected to the earth electrode formed on one of the side surfaces of the laminate substrate and serves as a short-circuit terminal, and the other end of the belt-like electrode is exposed on an ungrounded portion on the opposite side surface and serves as an open terminal.

Abstract: An explosion-proof battery includes a cover unit fit into an open portion of a cylindrical cup-like casing. The cover unit is electrically connected to a lead tab extended from an electricity generating unit installed in the casing. The cover unit includes a metal terminal plate of relatively high rigidity, a pressure sensitive plate in the form of a metal plate having relatively high flexibility and vulnerability, a fixing plate of insulating material, an electrical conductive member including an upwardly projecting portion and a base portion, and a ring-shaped gasket of insulating material. The terminal plate and the fixing plate have respective vent holes. The electrical conductive member and the pressure sensitive plate are connected to each other at a connecting portion on the projecting portion of the conductive member by welding. A tip end portion of the lead tab is connected to the base portion of the conductive member.

Abstract: In a switching power supply a stable dc output voltage having a higher power factor is obtained even for an unstable ac input voltage using a sufficiently broadened duty ratio of the switching signal.

Abstract: There is provided a stator yoke capable of improving magnetic characteristics and a rust-proofing effect of a stator yoke produced by using a Fe-Cr type alloy. When a stator yoke is produced by using a Fe-Cr type alloy, its magnetic characteristics can be improved, but when press working is made to obtain a predetermined shape, the magnetic characteristics drop. Annealing is carried out so as to recover the magnetic characteristics. This annealing generates the property change of a surface layer and a rust-proofing effect lowers.

Abstract: A zinc anode can is formed of a zinc based alloy material including 0.004-0.800 wt % of indium, 0.001-0.25 wt % of titanium or 0.002-0.500 wt % of zirconium, without containing significant amounts of harmful substances such as mercury, cadmium, or lead, is provided. A method of manufacturing of such zinc anode can enabling addition of up to 0.800 wt % of indium includes hot rolling of the zinc base alloy in a temperature range of 270-370.degree. C. A manganese dry battery includes a separator on which is coated a paste having 0.1-8 wt % of InCl.sub.3. The separator is disposed on the inner surface of the zinc can. An interior of the separator is filled with a cathode mixture containing conductive carbonaceous material such as manganese dioxide, and acetylene black and electrolyte with a ZnCl.sub.2 concentration of 35-50 wt %. A carbon rod as a collector is inserted into the center of the cathode mixture.