Abstract: A method of supplying lubrication oil to a two-stage screw compressor is disclosed in which a low-pressure stage screw compressor and a high-pressure stage screw compressor are integrally constructed. A compression space is formed by a male rotor and a female rotor, and operation gas is fed for compression to the compression space. The method prevents degradation of volumetric efficiency caused by return of lubrication oil, coming from a bearing and a shaft sealing device, to the low-pressure stage screw compressor, and as a result, refrigeration capacity is improved and the amount of the lubrication oil is reduced.

Abstract: A two-stage screw compressor has a low-pressure stage screw compressor and a high-pressure stage screw compressor integrally constructed. Compression space is formed by a male rotor and a female rotor, and operation gas is fed for compression to the compression space. A method of supplying lubrication oil prevents degradation of volumetric efficiency caused by return of lubrication oil, coming from a bearing and a shaft sealing device, to the low-pressure stage screw compressor. As a result, refrigeration capacity is improved and the amount of the lubrication oil is reduced.

Abstract: The present invention provides an inorganic composition for use in information recording medium disc substrate and such, having an excellent surface property capable of sufficiently corresponding with a ramp load system for high density recording, a high degree of tolerability to high speed rotation, and high productivity at a low melting point. Specifically, this invention provides an inorganic composition containing one crystalline phase selected from the group consisting of ?-quartz (?-SiO2), lithium disilicate (Li2Si2O5) and lithium monosilicate (Li2SiO3), or that contain at least a crystalline phase of lithium monosilicate (Li2SiO3), in which a mean particle diameter of a particle showing a crystalline phase contained in the inorganic composition is 1 ?m or less, a ring flexural strength is 300 MPa or more, and a surface roughness (an arithmetic mean roughness) thereof after a polishing process is 10 ? or less.

Abstract: The vapor compression refrigerating apparatus of the invention comprises a compressor 2, a condenser 4, a regeneration heat exchanger 6, an expansion means 8, and an evaporator 10 connected in series. The vapor compression refrigerating cycle is based on a cycle corresponding to a reversed Ericsson cycle in which isothermal heat dissipation process and isothermal heat absorption process occur overstriding a saturated vapor line and saturated liquid line respectively and heat exchange is carried out between isobaric heat dissipation process in a liquid zone and isobaric heat absorption process in a superheated vapor zone.

Abstract: Cryogenic liquefying/refrigerating method and system, wherein temperature of gas-to-be-liquefied at the inlet of the compressor for compressing the gas is reduced by cooling the gas discharged from the compressor using a high-efficiency chemical refrigerating machine and vapor compression refrigerating machine before the gas is introduced to a multiple stage heat exchanger thereby reducing power input to the compressor and improving liquefying/refrigerating efficiency.

Abstract: A method of supplying lubrication oil to a two-stage screw compressor is disclosed in which a low-pressure stage screw compressor and a high-pressure stage screw compressor are integrally constructed. A compression space is formed by a male rotor and a female rotor, and operation gas is fed for compression to the compression space. The method prevents degradation of volumetric efficiency caused by return of lubrication oil, coming from a bearing and a shaft sealing device, to the low-pressure stage screw compressor, and as a result, refrigeration capacity is improved and the amount of the lubrication oil is reduced.

Abstract: It is an object of the present invention to provide a method for producing glass in which the temperature distribution between around a central portion and around a side wall of a shaping mold (temperature distribution between around a central portion and around a side wall of molten glass in the shaping mold) is regulated within a range of ±150° C. to produce large-size glass, and to provide a device for shaping glass used in the method for producing glass. The object may be attained by carrying out a step of flowing the molten glass in a melting furnace, through a pipe to which a heat-insulating member is fixed to prevent the heat dissipation of the molten glass, into the shaping mold covered with a low heat-conductive member, and a step of maintaining the distance between the lower portion of the heat-insulating member and the liquid surface of the molten glass.

Abstract: Cryogenic liquefying/refrigerating method and system, wherein temperature of gas-to-be-liquefied at the inlet of the compressor for compressing the gas is reduced by cooling the gas discharged from the compressor using a high-efficiency chemical refrigerating machine and vapor compression refrigerating machine before the gas is introduced to a multiple stage heat exchanger thereby reducing power input to the compressor and improving liquefying/refrigerating efficiency.

Abstract: The present invention provides an inorganic composition for use in information recording medium disc substrate and such, having an excellent surface property capable of sufficiently corresponding with a ramp load system for high density recording, a high degree of tolerability to high speed rotation, and high productivity at a low melting point. Specifically, this invention provides an inorganic composition containing one crystalline phase selected from the group consisting of ?-quartz (?-SiO2), lithium disilicate (Li2Si2O5) and lithium monosilicate (Li2SiO3), or that contain at least a crystalline phase of lithium monosilicate (Li2SiO3), in which a mean particle diameter of a particle showing a crystalline phase contained in the inorganic composition is 1 ?m or less, a ring flexural strength is 300 MPa or more, and a surface roughness (an arithmetic mean roughness) thereof after a polishing process is 10 ? or less.

Abstract: A high rigidity glass-ceramic substrate is provided which contains, as a predominant crystal phase or phases, at least one crystal phase selected from the group consisting of enstatite (MgSiO3), enstatite solid solution (MgSiO3 solid solution), magnesium titanate (MgTi2O5) and magnesium titanate solid solution (MgTi2O5 solid solution), has fine crystal grains (preferably globular crystal grains) of precipitated crystal phases, has excellent melting property of a base glass, high resistivity to devitrification, easiness in polishing, excellent smoothness in the surface after polishing and has high Young's modulus capable of coping with a high speed rotation.

Abstract: A high rigidity glass-ceramic substrate is provided which contains, as a predominant crystal phase or phases, at least one crystal phase selected from the group consisting of enstatite (MgSiO3), enstatite solid solution (MgSiO3 solid solution), magnesium titanate (MgTi2O) and magnesium titanate solid solution (MgTi2O5 solid solution), has fine crystal grains (preferably globular crystal grains) of precipitated crystal phases, has excellent melting property of a base glass, high resistivity to devitrification, easiness in polishing, excellent smoothness in the surface after polishing and has high Young's modulus capable of coping with a high speed rotation.

Abstract: A high rigidity glass-ceramic substrate is provided which contains, as a predominant crystal phase or phases, at least one crystal phase selected from the group consisting of enstatite (MgSiO), enstatite solid solution (MgSiO3 solid solution), magnesium titanate (MgTi2O5) and magnesium titanate solid solution (MgTi2O5 solid solution), has fine crystal grains (preferably globular crystal grains) of precipitated crystal phases, has excellent melting property of a base glass, high resistivity to devitrification, easiness in polishing, excellent smoothness in the surface after polishing and has high Young's modulus capable of coping with a high speed rotation.

Abstract: A screw-compressor of which the full-load capacity can be adjusted without changing the shape, number of components and basic dimensions of the compressor, wherein the outer circumferential area of teeth above the pitch circle of the intake side end of the male rotor is eliminated stepwise to a prescribed angle of rotation to form an airflow rate reducing section and a bypass leading to the intake port is provided.

Abstract: A crew protection apparatus includes a DC power source; a squib connected in series with the DC power source; a plurality of switch circuits inserted between the DC power source and the squib or between the squib and the ground side; an acceleration sensor for detecting an acceleration caused by a collision; a collision determination circuit for, when receiving an acceleration signal from the acceleration sensor, determining the scale of a collision on the basis of the acceleration signal and outputting an ignition control signal in coincident with the timing supplied to the switch circuit and further outputting a current control signal in synchronism with the ignition control signal when it is determined that the collision is a serious collision; and a current limit circuit for limiting the magnitude of an ignition current flowing through the squib in accordance with the ignition control signal and the current control signal from the collision determination circuit.

Abstract: A passenger protecting device of a motor vehicle includes an acceleration sensor which issues an acceleration signal representative of the degree of a vehicle collision; a signal processing circuit which, by processing the acceleration signal, issues an ignition trigger signal when judging that the vehicle collision is critical; a DC power source for charging a plurality of back-up capacitors; a plurality of squibs each having first and second terminals, the first terminals of the squibs being connected to a common terminal and the second terminals of the squibs being connected to the back-up capacitors through respective connection lines; a first switch circuit having one terminal connected to the common terminal and the other terminal grounded; and a plurality of second switch circuits, each being disposed in each of the respective connection lines, each second switch circuit being turned ON when receiving the ignition trigger signal from the signal processing circuit.

Abstract: A screw rotor for fluid handling devices configured to reduce the area of blowholes virtually without relationship to the length of the sealing line by selecting specific profile shapes of the addendum of the female rotor and the dedendum on male rotor. Further, the screw rotor configuration eliminates semi-occluded pockets forming between the addendum of the female rotor and the dedendum of the male rotor.