Abstract: A bucket tooth capable of preventing a bolt from being loosened during operation is provided. In order to allow the bucket tooth to generate a resilient return force after attachment, a warp is caused by resilient deformation so that a face on the bucket lip side becomes a concave face. In addition, a spot facing portion is formed around a bolt hole into which a fastening bolt is inserted, on the side facing the bucket lip.

Abstract: In an interferometer for detecting interference light between light flux passed through an object to be inspected and reference light to be generated from a portion of the light flux passed therethrough, a phase of the interference light is detected with high precision. The light flux passed through the optical system to be inspected forms a spot image on a pinhole formed in a plate. Measuring light from the spot image and the reference-light diffracted out of the light flux from the spot image at the pinhole create interference light which in turn is received by an observation system. An image of interference fringes formed by the interference light is taken with an image pickup element. Further, heterodyne interference light is created by vibrating the plate in the direction intersecting the light flux or in the direction along the light path of the light flux, thereby detecting a phase of each portion of the interference fringes with high precision.

Abstract: A powder pressing apparatus comprises a die formed with a plurality of cavities. None of the cavities overlap with another in the direction of pushing the compacts. The magnetic field generator includes a pair of yokes sandwiching the die. The yokes and the die have their respective upper surfaces generally in a same plane. A die lubricant is applied to the die but not to a region on which the compacts are to be slid. A rare-earth alloy powder in a feeder box is supplied into each of the cavities. The powder in the cavities is oriented, pressed, and the formed compacts and the yokes are demagnetized. The compacts are pushed and slid off the die on an anti-wear layer, by a flexible pushing member provided in a front portion of the feeder box. The compacts are sintered into rare-earth magnets, which are suitable for a coreless motor.

Abstract: A reproducing apparatus reproduces a signal recorded in a magneto-optical disk. The magneto-optical disk includes a layered structure having a recording layer, an intermediate layer and a reproducing layer. Laser light is illuminated from an optical head to the magneto-optical disk in such an intensity that no magnetic domain is transferred from the recording layer to the reproducing layer only by the laser light. In this state, alternating magnetic field is applied through a magnetic head to the magneto-optical disk, thereby concurrently causing transfer and expansion of a magnetic domain to the reproducing layer. As a result, transfer of the magnetic domain is effected with expansion.

Abstract: An outboard motor includes an internal combustion engine provided with a pair of intake valves. The opening and closing operation of one of the intake valves can be paused. The internal combustion engine comprises a vertical crankshaft, a cylinder head provided with an intake port having a pair of intake openings for one combustion chamber, and a fuel injection valve for injecting the fuel into the intake port. The intake port has an upper branch section and a lower branch section extended under the upper branch section. A valve train includes a valve-operation mode changing mechanism. The valve-operation mode changing mechanism pauses the opening and closing operation of the first intake valve and operates the second intake valve for opening and closing the lower intake opening of the lower branch section while the internal combustion engine is operating at engine speeds in a low-speed range.

Abstract: In an apparatus for making plastic bags from a web material comprising two or more layers of plastic film, the material is intermittently fed for a length along a longitudinal feeding path, to successively make plastic bags with wastes, each of the wastes having upstream and downstream edges. The apparatus includes partially cutting means disposed at a first station predetermined along the feeding path. The material is partially cut by the partially cutting means along the upstream and downstream edges of waste whenever intermittently fed and temporarily stopped. The apparatus further includes waste removing means disposed at a second station predetermined downstream of and at a distance from the first station. The waste reaches the second station when the material is intermittently fed again after partially cut by the partially cutting means. In addition, the apparatus includes discharge means disposed at a third station predetermined downstream of and at a distance from the second station.

Abstract: Semiconductor chips mounted in a laminated manner on a substrate and a semiconductor integrated circuit device using the semiconductor chips. A predetermined semiconductor chip is selected by chip selection signals from an external unit despite the chips having the same wiring pattern are laminated in a plural number one upon the other. The semiconductor integrated circuit device is fabricated by using such semiconductor chips.

Abstract: A driving wheel is displaced downward by running off a traveling wheel when a vehicle passes through a diverging part and a detection value of an encoder provided in the driving wheel becomes incorrect by spinning free of the driving wheel. A track is equipped with a pair of the right and left traveling rails for traveling of a traveling wheel equipped with a vehicle, a slit formed to pass a traveling vehicle body between the traveling rails and a traveling face provided over the traveling rails, and the vehicle is provided with a pressure device for contacting a drive wheel with a traveling face.

Abstract: A ball screw having spacers which can assuredly be retained between balls and prevent direct contact between the balls. The ball screw includes a plurality of spacers (1) provided between respective adjacent pairs of balls. The spacers (1) each include a base plate (2) having front and back surfaces, and at least three projections (4, 6) provided on each of the front and back surfaces of the base plate (2). The projections (4) on the front surface are offset from the projections (6) on the back surface. The spacers (1) are each provided perpendicularly to a traveling direction of the balls with the projections (4, 6) on the front and back surfaces resiliently abutting against the balls.

Abstract: In an epicycle reduction gear arrangement having a built-in hydraulic motor, a rotation drum formed with internal teeth is rotatably attached to an outer peripheral side of a hydraulic motor housing and a planetary gear is arranged between an output shaft of a hydraulic motor projecting and extending from the hydraulic motor housing and the internal teeth of the rotation drum to thereby rotate the rotation drum in a speed reduced manner. The hydraulic motor housing is provided with a shell portion to which the rotation drum is fitted through a rotation bearing and a carrier member carrying both ends of a planetary gear shaft and having an outer diameter less than an inner diameter of the rotation bearing, the carrier member being formed integrally to an outer end surface portion of the hydraulic motor housing.

Abstract: A waste water treatment device is provided in which removal of phosphorus and removal of nitrogen can efficiently be carried out and a decrease in size of the device and a decrease in cost can be achieved. The waste water treatment device includes a waste water treatment chamber; at least one set of electrodes disposed so that at least a part of the electrodes are immersed in waste water in the waste water treatment chamber, at least one of said electrodes dissolving out, by electrolysis, iron ions or aluminum ions for precipitating and removing phosphoric acid ions in waste water; a power source for supplying an electrolytic current to the set of electrodes; a control section for controlling the power source; and a metallic catalyst which is disposed in the vicinity of at least one of the sets of electrodes and which effects a denitrifying reaction with hydrogen in waste water.

Abstract: A process for joining metals is provided, by which a core wire of a coated electric wire can be securely joined to a metal having a plated layer on the surface thereof. The process is to assemble a wiring module 1. The wiring module 1 has a metal piece 2, a coated electric wire 3 and so on. A plated layer 6 made of tin is formed on a surface of a matrix 5 of the metal piece 2. The coated electric wire 3 has a core wire 7. An ultrasonic welding is carried out after placing a part 7a of the core wire 7 on the plated layer 6 of the metal piece 2. The plated layer 6 is melted so as to join the part 7a of the core wire 7 to the matrix 5 and the core wire 7 is broken off separating the part 7a therefrom. Another ultrasonic welding is carried out after further placing another core wire 7 on the part 7a joined to the matrix 5, so that the core wire 7 of the coated electric wire 3 is joined to the metal piece 2 through the part 7a of the core wire 7.

Abstract: The present invention prepares a member having a potrusion-forming copper foil 21 formed on a conductor-circuit-forming copper layer 23 via an etching-barrier layer 22 formed of a different metal. Etching is selectively performed for the protrusion-forming copper foil 21 by using etchant that does not etch the etching-barrier layer, and protrusions 25 are thereby formed. Then, the etching-barrier layer 22 is removed using etchant that does not etch the copper foil 23 and using the protrusions as masks. An interlayer-insulating layer 27 is formed on a surface of the copper foil 23, on which the protrusions 25 are formed, so that the protrusions are connected to the conductor circuit. Thereby, heights of the protrusions are uniformed, and the reliability of connections can be improved.

Abstract: An object is to provide a technique of imparting durability which is equal to that of existing types of DVD-5 and DVD-10 as well as DVD-9 using gold or a silicon based compound as a semitransparent film, to a DVD obtained by bonding two substrates having information recording layers, respectively, on each outermost layer of which a thin film of silver or an alloy composed primarily of silver is formed. Using an optical disc wherein ratios of error rates before and after an environmental test at 80° C. and 85% RH for 96 hours is 10 or less, and an ultraviolet curable composition for optical disc wherein a water absorption rate of the cured coating film is 2.0 wt % or less and a water-vapor permeability at a film thickness of 50 &mgr;m is 70 g/m2·day or less, the object described above is achieved.

Abstract: The capacitor comprises a lower layer electrode 22 formed on a substrate 10 with an inter-layer insulation film 12 therebetween; an upper layer electrode 24 opposed to the lower layer electrode 22 with an inter-layer insulation film 12 therebetween, a lower interconnection layer 14 formed between the substrate 10 and the lower layer electrode 22, and electrically connected to the upper layer electrode 24, whereby the parasitic capacitance, which is a cause for lower capacitor accuracy, useless power consumption, etc. can be drastically decreased, and external noises can be shielded off.

Abstract: In a transmission/reception system, adaptive arrays separate signals from users by multiplying radio wave signals received through array antennas by reception signal weight vectors. A reception signal coefficient vector calculator preliminary calculates a reception signal vector of a U wave and produces a table in a memory. If a cross correlation value of the reception signal vector of the U wave and the reception signal vector of a user newly requesting connection is smaller than a prescribed value, a channel can be allocated to the newly requesting user even if the U wave level per se is high.

Abstract: The starting pyroxylin is subjected to an acetylation reaction while it is dispersed in a dispersion medium such as toluene and kept in a solid phase state, and acetylated pyroxylin is then separated from a reaction solution by means of filtration, so that an extra portion of anhydrous acetic acid taking no part in the reaction can be immediately recovered. This dispenses with the precipitation process required for a prior art solution reaction, and so eliminates an unstable quality factor due to product particle size variations. In addition, the process of washing the post-reaction crude acetylated pyroxylin is designed to include a washing step at a high temperature of 60° C. to 105° C. and a washing step using a stabilizer-containing washing agent, so that acetylated pyroxylin having improved heat resistance and stability can be provided.