Abstract: An information processing apparatus has a first display mode in which the entire screen region of a display is controlled to be displayed as a display region, and a second display mode in which a partial screen region excluding the predetermined screen region in the screen region of the display is controlled to be displayed as a display region, and performs a placement detection process of detecting placement of an external keyboard on the predetermined screen region in the screen region of the display, a communication control process of performing a communicative connection with the keyboard, and a display mode control process of controlling switching between the first display mode and the second display mode on the basis of the placement detection process and the communication control process.

Abstract: A fluid compressor comprising a helical blade type compression mechanism that includes a cylinder, a roller arranged inside the cylinder and a helical blade interposed between the roller and the cylinder. The blade, the roller and the cylinder are formed of materials whose coefficients of thermal expansion satisfy relationships: Blade>Roller>Cylinder. According to this invention, pressure release can be easily performed in the case where the liquid flows back or under a low-temperature condition as at the time of actuation. In addition, the compression performance can be improved under a high-temperature condition during operation.

Abstract: A fluid compressor has a sealed case, an electric motor section, and a compression section. Both sections are provided in the sealed case, with their axes extending substantially horizontally. The sealed case is filled with lubricant. At the start of the compressor, the rotational speed N of the electric motor section is gradually increased, but maintained at least once at a prescribed value for a predetermined period. At the stop of the compressor, the rotational speed N is gradually decreased, but maintained at least once at a prescribed value for a predetermined period.

Abstract: A fluid compressor includes a piston which has a vertical longitudinal axis. A plurality of working chambers are provided between a cylinder and the piston, and are constituted by upper working chambers and lower working chambers which separated from each other by a center portion of the piston. Fluid is sucked in the lowermost one of the upper working chambers and the uppermost one of the lower working chambers, respectively, and is compressed while being conveyed. The diameter .phi. D3 of a lower shaft portion of the piston and the diameter .phi. D4 of an upper shaft portion of the piston have a relationship .phi. D3 <.phi. D4 in order to apply an upward thrust force to the piston.

Abstract: A fluid compressor having a rotational force transmitting mechanism. The mechanism comprises an Oldam portion, an Oldam ring and a second cylinder gearing. The Oldam portion is integral with a piston. The Oldam ring has a first pair of key grooves and a second pair of key grooves. The key grooves of the first pair extend at right angles to those of the second pair. The second cylinder bearing is fitted in the cylinder and has two projections fitted in the key grooves of the second pair. The Oldam ring is made of silicon nitride ceramic.

Abstract: A fluid compressor has a piston, the axis of which is vertical. The dimensions of the parts of the compressor are determined such that an upward thrust force acting on the piston is substantially equal to or slightly greater than the total weight of rotational parts including the piston and a cylinder. Specifically, a groove formed in the piston has a pitch decreasing gradually from a lower part to an upper part of the piston, and a diameter (.PHI.D1) of a lower shaft portion of the piston, a diameter (.PHI.D2) of a upper shaft portion of the piston, and an inside diameter (.PHI.Dc) of the cylinder have a relationship, (D1.sup.2 +D2.sup.2)>Dc.sup.2.

Abstract: A fluid compressor includes a cylinder, a rotating member eccentrically arranged in the cylinder, the rotating member having a spiral groove formed in an outer surface thereof at a gradually decreasing pitch, a spiral blade having a suction-side end portion and a delivery-side end portion and fitted in the groove to be retractable, a plurality of operating chambers formed in the cylinder, partitioned by the blade, and gradually decreasing in volume, and allowing a target fluid to be supplied thereinto, an Oldham mechanism for coupling the cylinder and the rotating memory to each other and rotating the cylinder and the rotating member relative to each other, the Oldham mechanism having a rotating member Oldham portion arranged on the rotating member and having parallel slide contact surfaces, a lubricant supplied into the cylinder and urged against an inner surface of the cylinder upon rotation of the cylinder, and a lubricant retainer arranged in the cylinder and having a delivery hole for guiding the fluid,

Abstract: A compressor includes a cylinder, and a rotating body located in the cylinder. A spiral groove is formed on the outer periphery of the rotating body. A spiral blade is fitted in the groove and divides the space between the inner periphery of the cylinder and the outer periphery of the rotating body into operating chambers which have volumes gradually decreasing with distance from one end of the cylinder. A drive motor rotates the cylinder and the rotating body relative to each other. The drive motor includes a cylindrical stator fixed on a closed casing and a rotor mounted on the cylinder and situated inside the stator coaxially, with a motor air gap provided therebetween. A main bearing is engaged with the axial end portion of the cylinder and fixed on the inner wall of the casing by means of a fixing member situated radially more inward than the stator. The main bearing is fixed on the closed casing, with the position of the main bearing adjusted by a master rotor.

Abstract: A compressor includes a casing having an oil reservoir, a cylinder situated within the casing, a cylindrical rotary body situated eccentrically within the cylinder, the rotary body having first and second spiral grooves extending in opposite directions from the middle part of the rotary body to both ends of the rotary body, first and second spiral blades fitted in the first and second spiral grooves, the blades having outer peripheral surfaces brought into contact with the inner peripheral surface of the cylinder, dividing the space defined by the inner peripheral surface of the cylinder and the rotary body into a plurality of working chambers, thereby constituting first and second compression sections, wherein the first and second blades freely project from and retreat in the first and second spiral grooves in the radial direction of the rotary body, driving means for rotating the cylinder and the rotary body relative to each other, a first refrigerant passage formed in the rotary body and opening to an area

Abstract: A fluid compressor is provided which includes a closed case having a case body with an open end and cover for closing the open end of the case body to house drive compressor sections and therein. The compressor section has a cylinder having an axial line and both ends located on sucking and discharging sides thereof, rotated by the drive section, a rotating body provided with an axial line offset to the axial line and a spiral groove formed on the outer circumference thereof at such a pitch that becomes smaller and smaller as it comes from the sucking side end thereof nearer to the discharging side thereof, and arranged to contact a part of the outer circumference thereof with the inner circumference of the cylinder.

Abstract: A compressor having a cylinder and a cylindrical rotational body housed within the cylinder. A spiral groove is formed in the outer peripheral surface of the rotational body, and a spiral blade is fitted in the groove so as to be freely retreated in and projected from the groove in the radial direction of the rotational body. The cylinder and the rotational body are rotated relative to each other by a drive mechanism. A fluid to be compressed is introduced into working chambers defined by the blade, the inner peripheral surface of the cylinder and the outer peripheral surface of the rotational body. The fluid is first guided into the first working chamber from a gas suction port, and then into the second and subsequent working chambers successively, whereby the fluid is compressed. An oil supply mechanism supplies pressurized oil to an oil supply hole formed in the rotational body.

Abstract: A compressor has a cylindrical casing unit having at least one open end. A compression element includes a circular cylinder held in the casing unit, a cylindrical rotating body having at least one spiral groove on its outer periphery and eccentrically arranged in the cylinder, and a spiral blade wrapped on the rotating body and fitted in the spiral groove in a manenr to be freely displaceable relative to the spiral groove. The cylinder and rotating body are journaled in a bearing means. A frame includes a cylindrical section intimately inserted into an open end of the casing unit and a disc section blocking the cylindrical section and provided orthogonal to an axis of the cylindrical section, the frame blocking the open end of the casing unit and supporting the bearing means.

Abstract: The Oldam-ring of the rotational force transmitting mechanism of a fluid compressor is engaged with the rectangular section formed on the base portion of the main shaft of the rotary rod in the direction perpendicular to the axial direction of the main shaft to achieve an easy assembling of the Oldam-ring to the rectangular section. If the fluid compressor employs a thrust force canceling system wherein the thrust force acting on the rotary rod from the discharge side toward the suction side of a cylinder is canceled by a counter thrust force, the diameter of the main shaft located at the suction side is increased compared with that of the conventional fluid compressor to increase the counter thrust force acting on the edge surface of the main shaft whereby the thrust force can be effectively canceled.

Abstract: A fluid compressor includes a closed case and a cylinder which is arranged in the case and has two opposite ends. A columnar rotating rod is located in the cylinder to be eccentric thereto, and rotatable along with the cylinder. The rod has a spiral groove on the outer circumferential surface thereof, and a spiral blade is fitted in the groove to divide the space between the rod and the cylinder into a plurality of operating chambers. The ends of the cylinder are rotatably supported by first and second bearings. The first bearing is secured to the casing. A drive unit for rotating the cylinder and rod includes a rotor fixed to the cylinder. The rotor has the center of gravity which is apart from the middle of the cylinder in its axial direction toward the first bearing.

Abstract: A fluid compressor includes a cylinder having first and second discharge ends, in which a rotating rod is rotatably arranged. First and second spiral grooves are formed on the outer circumference of the rod, and first and second spiral blades are fitted into the grooves. The first groove has a first starting end located in the middle portion of the rod, and extends from the starting end toward the first discharge end. The second groove has a second starting end located in the middle portion of the rod, and extends from the second starting end toward the second discharge end. The first and second starting ends are set apart from each other by a certain angle in the circumferential direction of the rod. Operating fluid is introduced into the middle portion in the cylinder, and fed to the first and second discharge ends of the cylinder through operating chambers defined by the first and second blades in the cylinder.

Abstract: A compressor includes a casing wherein a compression section and a drive section are contained. The compression section has a cylinder, a rotary rod eccentrically arranged in the cylinder and rotatable relative to the cylinder, and first and second bearings rotatably supporting suction- and discharge-side ends of the cylinder. A space defined between the inner circumferential surface of the cylinder and the outer circumferential surface of the rod is divided into a plurality of operating chambers by a spiral blade mounted on the rod. A fluid introduced into the suction-side end of the cylinder is transferred to the discharge-side end of the cylinder through the operating chamber while it is compressed. The compressed fluid is discharged into the casing. The pressure of the introduced fluid is applied to a discharge-side end of the rod, and the pressure of the compressed fluid is applied to a suction-side end of the rod.

Abstract: A fluid compressor includes a rotating body arranged in a cylinder to extend in the axial direction of the cylinder and eccentric thereto. A spiral groove is formed on the outer circumference of the rotating body, and a spiral blade is slidably fitted in the groove. The pitches of the groove is narrowed at a predetermined rate with a distance from a suction-side end of the cylinder to a discharge-side end of the cylider. The groove has an enlarging section which has a start point, a changeover point, and a terminal point. The enlarging section includes a first portion extending from the start point to the changeover point and having a pitch which changes at a rate smaller than the predetermined rate, and a second portion extending from the changeover point to the terminal point and having a pitch which changes at a rate larger than the predetermined rate. The space between the rotating body and the cylinder is divided by the blade into a plurality of operation chambers.

Abstract: A fluid compressor includes cylinder, and a cylindrical rotating body located in the cylinder. One end of the cylinder is rotatably supported by a first bearing fixed to a case and the other end of the cylinder is slidably fitted with a second bearing. The second bearing is coupled with the first bearing through a support shaft which extends through the cylinder and rotatably supports the rotating body. A spiral groove is formed on the outer circumferential surface of the rotating body. A spiral blade is fitted into the groove and divides the space between the inner circumferential surface and the outer circumferential surface into a plurality of operating chambers which have volumes gradually decreasing with a distance from one end of the cylinder. When the cylinder and rotating body are relatively rotated, a fluid, introduced into the one end of the cylinder, is transferred toward the other end of the cylinder through the operating chambers and compressed during the transfer.

Abstract: A compressor includes a cylinder, and a rotary rod arranged in the cylinder. A spiral groove is formed on the outer periphery of the rotary rod. The spiral groove is formed such that its depth direction extending from the bottom of the groove to the opening thereof is inclined at a predetermined angle toward a discharge side of the cylinder with respect to the axis of the rotary rod. Pitches of the spiral groove are gradually narrowed with distance from the suction-side end of the cylinder. A spiral blade is fitted in the spiral groove to be slidable in the depth direction. The blade divides a space between the outer periphery of the rotary rod and the inner surface of the cylinder into a plurality of working chambers. When the cylinder and rotary rod are relatively rotated, a fluid, introduced into the suction-side end of the cylinder, is transported toward the discharge-side end of the cylinder through the working chambers.