Abstract: In a motor driving control device, a high-frequency alternating voltage or rotation voltage (having a frequency of ?h) is applied to a motor so that magnetic saturation occurs in the motor, thereby extracting, from a ?-axis current, a high-frequency second-harmonic component (a frequency component of 2×?h) that is obtained by attenuating at least a direct-current component of the ?-axis current. The polarity checker detects the polarity of the magnetic pole of the rotor based on the difference, caused by magnetic saturation, between the positive and negative amplitudes of the high-frequency second-harmonic component.

Abstract: A position-sensorless motor control device has a superposer that superposes, on the drive current with which the motor is driven, a superposed current having a different frequency than the drive current, a superposed component extractor that extracts, from the motor current fed to the motor, the ?-axis and ?-axis components of the superposed current, and a controller that controls the motor so that the direct-current component of the arithmetic product of the extracted ?-axis and ?-axis components of the superposed current converges to zero.

Abstract: An ejector apparatus wherein, in mounting a lift core to a slide base, and in mounting an ejector core to an ejector plate, it is easy to mount the lift and ejector cores to the slide base and the ejector plate, and simultaneously perform adjustment that allows for thermal expansion of the cores. The ejector apparatus includes a lift core extending through a core constituting a mold and movably installed in a longitudinal direction of the lift core with respect to a surface of the core; an ejector plate arranged between the core and a base plate, and being capable of moving up and down, the base plate being arranged below and spaced from the core; and an adjustment coupling constructed such that a lower end portion of the lift core is supported to expand and contract in a longitudinal direction of the lift core relative to the ejector plate.

Abstract: In a one-and-a-half circuit breaker system gas-insulated switchgear assembly for three-phase AC transmission, the circuit breakers are located on a common horizontal floor directed in Y direction. First main bus bars extending in X direction are located above the first circuit breakers. The positions of the first main bus bars in different phases are different from one another only in height. Similarly, the second main bus bars extending in X direction are located above the third circuit breakers. Each phase of the main bus bars and disconnecting switches is located in a common horizontal plane. The heights are different for different phases. Relative locations of the disconnecting switches are substantially common for every phase horizontally, but are shifted in the X direction.

Abstract: An ejector apparatus wherein, in mounting a lift core to a slide base, and in mounting an ejector core to an ejector plate, it is easy to mount the lift and ejector cores to the slide base and the ejector plate, and simultaneously perform adjustment that allows for thermal expansion of the cores. The ejector apparatus includes a lift core extending through a core constituting a mold and movably installed in a longitudinal direction of the lift core with respect to a surface of the core; an ejector plate arranged between the core and a base plate, and being capable of moving up and down, the base plate being arranged below and spaced from the core; and an adjustment coupling constructed such that a lower end portion of the lift core is supported to expand and contract in a longitudinal direction of the lift core relative to the ejector plate.

Abstract: A small-size motor of a type comprising brushes and a commutator slidably engaged with the brushes, characterized in that a motor case is filled with an atmosphere containing vapor of at least one organic compound selected from the group consisting of paraffins, mono- or poly-hydric alcohols, ethers, cyclic ethers, esters, ketones, ether alcohols, ester alcohols, aminoalcohols, carboxylic acids, amides, primary, secondary and tertiary amines, imidazoles, imidazolines and monocyclic oxyterpenes, which is stably operated and has a prolonged duration of life.

Abstract: The electrically controlled force transmitting apparatus includes a drive member having an electrically conductive surface and a driven member having an electrically conductive surface, which are arranged to be opposed to each other with a small space therebetween, a fibrous member provided in the space between the opposed electrically conductive surfaces of the drive and driven members, and a voltage supply source connected across the electrically conductive surfaces, whereby by applying a voltage across the opposed surfaces, there is induced a shear stress and a force is transmitted from the drive member to the driven member. The space in which the fibrous member is arranged is preferably filled with an electrically insulating fluid medium.

Abstract: A dispensing apparatus includes a tube-feeding portion which holds and feeds a tube made of an elastic material, a tube nozzle portion which supports an end portion of the tube and guides the tube to a liquid container by moving the tube up and down and from side to side, a tube-pressing and conveying portion provided between the above tube-feeding portion and the tube nozzle portion which draws out the tube from the tube-feeding portion, presses the tube and conveys the tube to the tube nozzle portion and a tube end-discarding portion, wherein the tube-pressing and conveying portion includes tube-pressing rollers which press the tube and set a length of a tube-pressing portion.

Abstract: A process for preparing a palladium catalyst for purifying a waste gas is disclosed. The process comprises dissolving dinitrodiammine palladium in a nitric acid solution in the temperature range of 60.degree. to 100.degree. C., aging the solution, applying the solution on a carrier, and reducing the palladium compound on the carrier to prepare the palladium catalyst.The catalyst prepared has the excellent catalytic performance because the nitric acid solution of the dinitrodiammine palladium is a completely uniform solution which can disperse the dinitrodiammine palladium uniformly on the carrier.

Abstract: At least a portion of an oxygen sensor element support to which portion an oxygen sensor element directly contacts is constructed of an heat insulating material having very low thermal conductivity, so that the heat release from the oxygen sensor element is minimized.

Abstract: A process for forming a thin dense layer from a paste of powder in organic vehicle, comprises applying the paste onto a substrate by a screen printing technique, drying and sintering the applied paste under sintering conditions, and repeating the above procedure at least one more time, so as to yield a thin dense sintered layer which is longer in lifetime and more stable in quality than those obtained by known techniques.

Abstract: In an oxygen sensor comprising an oxygen ion conductive solid electrolyte, an electronically conductive reference electrode layer formed on one side of the electrolyte layer, an electronically conductive measurement electrode layer formed on the other side of the electrolyte layer, and a partition layer of an electrochemically inactive material formed on the outer side of the reference electrode layer, at least one of the reference and measurement electrode layers has a plurality of openings through which two layers which put therebetween the one of the electrode layers are united with each other.

Abstract: In an oxygen sensor comprising an oxygen ion conductive solid electrolyte, an electronically conductive reference electrode layer formed on one side of the electrolyte layer, an electronically conductive measurement electrode layer formed on the other side of the electrolyte layer, and a partition layer of an electrochemically inactive material formed on the outer side of the reference electrode layer, at least one of the reference and measurement electrode layers has a plurality of openings through which two layers which put therebetween the one of the electrode layers are united with each other.

Abstract: A method of producing an oxygen sensing element which is essentially an oxygen concentration cell in the form of a lamination of relatively thin layers. The first step of the method is to prepare a lamination of a ceramic shield layer, an inner or reference electrode layer, a solid electrolyte layer and an outer or measurement electrode layer which is formed by sintering metal particles applied to the solid electrolyte layer surface in the form of a paste or slurry and dried. Then an additional measurement electrode layer, preferably not thicker than 1.0 micron, is formed on the outer surface of the sintered measurement electrode layer by a physical vapor deposition technique such as ion plating, sputtering or vacuum evaporation. Preferably this electrode layer is formed by a two-stage vapor deposition process wherein the first stage deposition is terminated before the deposited layer becomes thicker than 0.5 microns.

Abstract: A method of producing a flat solid electrolyte layer of a flat film type oxygen sensor is disclosed. The method comprises in steps, (a) preparing first and second electrolyte pastes each containing stabilizer, the content of stabilizer in the first electrolyte paste being smaller than that in the second electrolyte paste, (b) applying the first electrolyte paste onto an electrode layer and then applying the second electrolyte paste onto the outer face of the first electrolyte paste to form a layered paste heap on the electrode layer, and (c) firing the layered paste heap to form a solid electrolyte layer on the electrode layer. With this production method, the stabilizer is uniformly and homogeneously distributed into the body of the fired electrolyte layer.

Abstract: A device comprising an oxygen-sensitive element to be disposed in a combustion gas exhausted from a combustor to detect deviation of actual air/fuel ratio from a stoichiometric ratio. The element is a combination of two oxygen concentration cells each having a solid electrolyte layer, a measurement electrode layer formed on one side of the electrolyte layer, a reference electrode layer formed on the opposite side and covered with a shield layer. Either measurement electrode layers or reference electrode layers of the two cells are connected to each other, and a constant DC voltage is applied to the element to force a current to flow through solid electrolyte layers of both cells to cause migration of oxygen ions therethrough, from the measurement electrode to the reference electrode in one cell and reversely in the other.

Abstract: A device comprising an oxygen-sensitive element to be disposed in combustion gas exhausted from a combustor to detect deviation of actual air/fuel mixing ratio of a mixture supplied to the combustor from a stoichiometric ratio. The element is a combination of two oxygen concentration cells each having a solid electrolyte layer, a measurement electrode layer formed on one side of the electrolyte layer and a reference electrode layer formed on the opposite side and covered with a shield layer.

Abstract: A device having an oxygen sensing probe to be disposed in a combustion gas to detect actual air/fuel ratio values of an air-fuel mixture subjected to combustion. The probe is a combination of two oxygen concentration cells each having a porous solid electrolyte layer such as of zirconia, a porous measurement electrode layer on one side of the solid electrolyte layer and a reference electrode layer on the other side, with a shield layer thereon. Either the shield layers of the two cells or the solid electrolyte layers of the two cells are provided by a single layer which serves also as a substrate of the entire probe. The device includes DC power supply means for forcing a current to flow through the solid electrolyte of each cell thereby to cause oxygen ions to migrate through each solid electrolyte layer, from the reference electrode layer to the measurement electrode layer in one cell and reversely in the other cell.

Abstract: A method of detecting numerical values for air/fuel ratio of either a lean air-fuel mixture or a rich mixture supplied to, for example, a combustion engine by means of an oxygen sensor disposed in the exhaust gas. The sensor comprises a porous measurement electrode layer on one side of a porous solid electrolyte layer, e.g., of zirconia and a porous reference electrode layer on the other side with a shield layer thereon, so that the reference electrode layer communicates with the exhaust gas through pores in the sensor. Measurement is accomplished by keeping a DC current flowing between the two electrode layers to establish a reference oxygen partial pressure on the reference electrode side. The intensity of the current is made below a critical value above which an EMF generated by the sensor becomes substantially constant unless the air/fuel ratio changes across the stoichiometric ratio, and the direction of the current flow is chosen depending on whether the air-fuel mixture is a lean one or a rich one.

Abstract: An apparatus comprising a probe having an oxygen ion conductive solid electrolyte layer, a potentiometer and a DC power source connected to the probe. The probe comprises a porous and electronically conductive reference electrode layer on one side of the solid electrolyte layer, a similar measurement electrode layer on the other side of the electrolyte layer and a separation layer of an inactive material on the outer side of the reference electrode layer. The separation layer or the solid electrolyte layer, or both, has a porous structure and is formed such that the reference electrode communicates with an exterior atmosphere only through this porous structure, while either the separation layer or the electrolyte layer serves as a substrate of the probe. During measurement, the DC power source keeps a current flowing through the electrolyte layer between the two electrode layers to maintain a reference oxygen partial pressure at the interface between the electrolyte layer and the reference electrode layer.