Abstract: A viscous material application apparatus includes a main body having a pressurized chamber which connects through to a discharge port and stores a viscous material, a viscous material supply device for transferring the viscous material to the pressurized chamber, and a discharge pressure regulating device for regulating the discharge pressure of the viscous material when the viscous material inside the pressurized chamber is pressurized and discharged by increasing or decreasing the capacity of the pressurized chamber, the discharge pressure regulating device being provided either inside the pressurized chamber or facing the pressurized chamber.

Abstract: A disk cartridge which contains an optical disk, comprising a first half shell, and a second half shell which is openable against the first half shell, wherein the first half shell is formed with notches to expose a part of the circumference of the optical disk.

Abstract: In a fuel injection pump, axial ends of first and second plungers driven by a drive shaft via a cam and a cam ring are in slidable contact with first and second sliding surfaces of the cam ring. The first and second sliding surfaces are positioned on opposite sides of the drive shaft and non-parallel. When the first plunger is in compression stroke, a wedge shaped gap whose angle is &agr; is formed between the axial end of the second plunger and the second sliding surface. Accordingly, when the second plunger is in the compression stroke, sliding contact portions of the axial end of the second plunger and the second sliding surface are well lubricated by fuel entered the gap, resulting in preventing frictional seizure thereof.

Abstract: A solenoid valve is provided which may be used to inject fuel into an internal combustion engine for automotive vehicles. The solenoid valve is designed to keep an air gap between a stator and an armature at a constant interval required to ensure a normal operation of the solenoid valve. The solenoid valve includes a spacer which is provided between the stator and the armature to keep the air gap without any hit of the armature on the stator. In one embodiment, the spacer is installed on a peripheral portion of the stator or the armature.

Abstract: A relay lens driving device provided in an optical head moves a relay lens in the direction of an optical axis thereof to correct a spherical aberration that may be caused by an error in the thickness of a cover layer of an optical disk. The relay lens driving mechanism has a lens to correct spherical aberrations, a lens holder which holds the lens, a first parallel plate spring which supports the lens holder at one end thereof, an intermediate member attached to the other end of the first parallel plate spring, a second parallel plate spring arranged to extend from the intermediate member to the lens holder to support the intermediate member at one end thereof, and a fixing member which fixes the other end of the second parallel plate spring.

Abstract: For reflow soldering, radiant heating is applied to one surface of a printed circuit board on which electronic components are placed and onto which cream solder is supplied and at the same time hot air is blown locally and roughly perpendicular to to-be-connected points on said one surface of the printed circuit board. This reflow method permits secure soldering even if the hot air is set at a temperature not exceeding the heat resistance of the electronic components, which is possilbe because of its combination with the radiant heat. Moreover, this reflow method can permit soldering in such a manner that only the to-be-connected points are heated selectively, because the hot air is blown locally and roughly perpendicular to the points to be connected. Thus, this reflow method prevents heat damage to other sections than the to-be-connected points and ensures that the solder at the to-be-connected points is melted.

Abstract: For reflow soldering, radiant heating is applied to one surface of a printed circuit board on which electronic components are placed and onto which cream solder is supplied and at the same time hot air is blown locally and roughly perpendicular to to-be-connected points on said one surface of the printed circuit board. This reflow method permits secure soldering even if the hot air is set at a temperature not exceeding the heat resistance of the electronic components, which is possilbe because of its combination with the radiant heat. Moreover, this reflow method can permit soldering in such a manner that only the to-be-connected points are heated selectively, because the hot air is blown locally and roughly perpendicular to the points to be connected. Thus, this reflow method prevents heat damage to other sections than the to-be-connected points and ensures that the solder at the to-be-connected points is melted.

Abstract: A solenoid valve is provided which may be used to inject fuel into an internal combustion engine for automotive vehicles. The solenoid valve is designed to keep an air gap between a stator and an armature at a constant interval required to ensure a normal operation of the solenoid valve. The solenoid valve includes a spacer which is provided between the stator and the armature to keep the air gap without any hit of the armature on the stator. In one embodiment, the spacer is installed on a peripheral portion of the stator or the armature.

Abstract: For reflow soldering, radiant heating is applied to one surface of a printed circuit board on which electronic components are placed and onto which cream solder is supplied and at the same time hot air is blown locally and roughly perpendicular to to-be-connected points on said one surface of the printed circuit board. This reflow method permits secure soldering even if the hot air is set at a temperature not exceeding the heat resistance of the electronic components, which is possilbe because of its combination with the radiant heat. Moreover, this reflow method can permit soldering in such a manner that only the to-be-connected points are heated selectively, because the hot air is blown locally and roughly perpendicular to the points to be connected. Thus, this reflow method prevents heat damage to other sections than the to-be-connected points and ensures that the solder at the to-be-connected points is melted.

Abstract: An objective lens holder that holds an objective lens that directs a laser beam onto a disk is formed of a permanent magnet. Yokes are arranged at the periphery of the objective lens holder, with a focus coil and tracking coil fixed to them. One end of a wire-shaped flexible body is connected to one side face of the objective lens holder, the objective lens holder being thereby suspended and supported. Since the objective lens holder has applied to it displacement components with five degrees of freedom, excluding the axial direction of the flexible body, tilting of the optical axis of the objective lens can be generated. Consequently, coma aberration of the objective lens is reduced and high density recording and reproducing can be achieved.

Abstract: A data storage-playback apparatus includes a head for storing and playing data which is movable on the data storage media. A guide rail guides the head along a predetermined direction of the data storage media. The guide rail is composed of a ferromagnetic substance and passes through a coil. The coil is fixed to the head. A yoke is magnetically connected with the guide rail. A permanent magnet is fixed to the yoke and oriented with a magnetic direction aligned toward a curved surface of the coil. A length of the permanent magnet along the magnetic direction is larger than a height of the permanent magnet along a direction perpendicular to both the magnetic direction and a length direction of the guide rail.

Abstract: A high-frequency induction heater having a working coil for providing a high-frequency application of power to a sample is provided with a control circuit for controlling the amount of power to the working coil. A phase control member can be triggered to provide a first level of power to the sample to heat it below its combustion level, to thereby remove any exterior stains. Subsequently, a second level of power can be applied for a predetermined period of time to heat it to a combustion point whereby the combustion gases of the sample are free from any byproducts of the stain and an accurate measurement can be accomplished.

Abstract: A focus driving coil is fixed to an objective lens for record/reproduction of an optical disk, and the objective lens is provided on a carriage together with the focus driving coil. The carriage is movable by a bearing contacting a guide rail, and the bearing and the carriage are guided to a predetermined direction by the guide rail. In the guide rail, a radial driving coil is provided to be inserted to the guide rail, and a radial yoke magnetically contacting the guide rail is provided. A radial driving magnet is fixed to the radial yoke, and a focus driving magnet is provided in the radial driving magnet so as to be magnetized in a direction opposite to a direction of magnetization of the radial driving magnet through the guide rail.

Abstract: An optical disk drive which is a data recording device or a data reproducing device having two movable members. The first movable member has two objective lenses on it. A magnetic circuit is secured to the second movable member to apply a magnetic field to the tracking coil attached to the first movable member. The first and second movable members can rotate around a shaft. The first objective lens or the second objective lens is selected and used in accordance with the type of the disk used. The device can therefore record data on or reproduce data from disk of different types. Further, since the angle at which the second movable member is inclined to the shaft remains unchanged, the device can record data on or reproduce data from a disk, without causing coma-aberration or the like, no matter whether the first object lens or the second objective lens is selected and used.

Abstract: An optical disk apparatuses includes a turntable with a bearing surface, and a spindle motor for rotating the turntable. The spindle shaft has a cylindrical first shaft having an upper end flush with the bearing surface, and a second shaft having an upper end portion and arranged in the first shaft to be slidable between an engaging position in which the upper end portion projects from the upper end of the first shaft to engage a center hole of an optical disk placed on the bearing surface and a depressed position in which the upper end portion is recessed from the upper end of the first shaft to be disengaged from the optical disk. The second shaft is moved by a spindle moving mechanism from the first position to the second position when the optical disk is to be loaded on and unloaded from the turntable.

Abstract: Disclosed are a process for producing an unsaturated aldehyde and an unsaturated carboxylic acid which comprises subjecting propylene, isobutylene or tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of (i) a catalyst comprising composite oxide of the formula Mo.sub.a Bi.sub.b Fe.sub.c A.sub.d B.sub.e C.sub.f D.sub.g O.sub.x and (ii) a molybdenum oxide which in itself is substantially inert to the gas phase catalytic oxidation; a process for reusing the catalyst deteriorated due to the gas phase catalytic oxidation after mixing it with the molybdenum oxide; and a method of regenerating the deteriorated catalyst by mixing it with the molybdenum oxide.

Abstract: An optical disk apparatus includes a turntable with a bearing surface, and a spindle motor for rotating the turntable. The spindle shaft has a cylindrical first shaft having an upper end flush with the bearing surface, and a second shaft having an upper end portion and arranged in the first shaft to be slidable between an engaging position in which the upper end portion projects from the upper end of the first shaft to engage a center hole of an optical disk placed on the bearing surface and a depressed position in which the upper end portion is recessed from the upper end of the first shaft to be disengaged from the optical disk. The second shaft is moved by a spindle moving mechanism from the first position to the second position when the optical disk is to be loaded on and unloaded from the turntable.

Abstract: Nitrobenzenes are prepared by nitrating benzenes in vapor phase using nitric acid as a nitrating agent and under continuous or intermittent feeding of sulfuric acid as a catalyst in the presence of a catalyst comprising sulfuric acid supported on a carrier or in the presence of only a carrier. This process can provide very high and prolonged nitration activity.

Abstract: Nitrobenzenes are prepared by nitrating benzenes in a vapor phase with dilute or concentrated nitric acid wherein the following (A) or (B) is used as a catalyst:(A) acidic sheet clay minerals ion-exchanged with polyvalent metals, or(B) acidic composite oxides comprising oxides of metals belonging to Group IVA of the Mendeleefs' periodic table and tungsten oxide, molybdenum oxide, niobium oxide or zinc oxide.These catalysts have high catalyst activity and selectivity for vapor phase nitration reaction of benzenes with nitric acid and besides the activity is retained for a long time.

Abstract: There is provided a soft magnetic material composition comprising 70 to 95 vol % of soft magnetic material powder, with the balance being a liquid thermosetting resin. The composition has a high density and initial permeability. According to the process of this invention, the composition can be efficiently made into molded products of high permeability having a high strength and dimensional accuracy.