Abstract: This invention relates to lubricant base oil having high viscosity indexes and low pour points, and particularly to lubricant base oil consisting essentially of a normal paraffin and an isoparaffin, wherein (a) an average carbon number Nc in one molecule is not less than 28 but not more than 40, and (b) an average branch number Nb in one molecule calculated from a ratio of CH3 carbon to total carbon determined by 13C-NMR analysis and the average carbon number Nc in one molecule is not more than (0.2Nc?3.1) but not less than 1.5.

Abstract: An image display apparatus includes a diaphragm (9b) arranged at a pupil position. The shape of an aperture of the diaphragm (9b) is similar to the shape of a light source image formed by an illuminating optical system at the pupil position. An area varying mechanism (90) varies the area of the aperture of the diaphragm (9b) in response to a focal length varying operation of a projection lens (9). This prevents an excessive opening from being formed around a light source image cast by the illuminating optical system, thereby preventing the deterioration of displayed images due to unwanted light that may pass through the excessive opening.

Abstract: In a preferred embodiment of the present invention, white light emitted from a light source is homogenized by an integrator optical system; the R and the G light component of the white light becomes P polarization light as the white light passes through a color polarizer; and then the G light component is converted into P polarization light while the R light component remains unchanged as the G and the R light pass through another color polarizer. Then, the G and the R light are light-modulated respectively by reflection type spatial light modulation elements for the G and the R light, the elements being disposed so that they have a different distance from a polarizing split face of a polarizing beam splitter. The G light that has been light modulated passes through a lens causing an axial chromatic aberration corresponding to the distance difference and thus exits therefrom.

Abstract: One of preferred embodiments according to the present invention provides a reflection type projection apparatus that includes wire grid polarizers provided respectively for red (R), green (G) and blue (B) light that allow a first polarization component included in R, G, or B light from illumination units to pass therethrough and reflect second polarization components of R, G and B colors that have been produced when reflection type spatial light modulation elements respectively for R, G and B light light-modulate and reflect the first polarization component having once passed through the wire grid polarizers respectively for R, G and B light, the transmission type polarizing plates provided respectively for R, G and B light, and a color combination optical system in this order along a light path, wherein any one of the light reflection surface of at least one of the wire grid polarizers respectively for R, G and B light, the light transmission surface of at least one of the transmission type polarizing plates

Abstract: An image display apparatus includes a diaphragm (9b) arranged at a pupil position. The shape of an aperture of the diaphragm (9b) is similar to the shape of a light source image formed by an illuminating optical system at the pupil position. An area varying mechanism (90) varies the area of the aperture of the diaphragm (9b) in response to a focal length varying operation of a projection lens (9). This prevents an excessive opening from being formed around a light source image cast by the illuminating optical system, thereby preventing the deterioration of displayed images due to unwanted light that may pass through the excessive opening.

Abstract: A conveyor for guiding and conveying a plurality of sheet-shaped thin plates in rows arranged side by side to a welding position at which ends of the adjacent thin plates are butted and welded to each other, includes a plurality of conveying paths, which are adjacent to each other, having different conveying surfaces which are placed on a same horizontal plane, and a guide unit disposed between the adjacent two conveying paths for guiding the thin plates on one of the conveying paths with respect to another one thereof toward the welding position. Each of the conveying paths is composed of a plurality conveying rollers, and the guide unit includes guide rollers each having a guide surface for guiding the thin plate on the one of the conveying paths in a state that the thin plate on the one conveying path is partially depressed with respect to the another one of the conveying path.

Abstract: An armature of a rotating electric machine has a plurality of first magnetic teeth arranged side by side along a circumferential direction of the rotating electric machine and a plurality of second magnetic teeth joined to the first magnetic teeth. A pair of joint portions is formed at both end surfaces of a yoke portion of each first magnetic tooth, the joint portions formed at the facing end surfaces of the yoke portions of each successive pair of adjacent first magnetic teeth together forming a connecting part, whereas a mating part is formed at an outer end surface of each second magnetic tooth. Each second magnetic tooth is inserted between the adjacent first magnetic teeth along an axial direction of the rotating electric machine with the mating part fitted on the connecting part to interconnect the adjacent first magnetic teeth.

Abstract: A stator for use in a rotating electrical machine is constituted by arranging the prescribed number of stator units in the circumferential direction of a stator core having a circular ring shape. The stator units provide magnetic teeth that project inwardly in the radial direction of the stator core. Coils are wound about the magnetic teeth via insulating members. Each of the insulating members arranges thick portions that slightly project opposite to each other in the width direction of the magnetic tooth, wherein the thick portions are shifted in positions in the thickness direction of the stator core with respect to opposite sides of the magnetic teeth arranged opposite to each other. Thus, it is possible to noticeably improve the space factor in the stator.

Abstract: A white light emitted from a light source is homogenized by an integrator optical system, transmitted through a color polarizer (113) to be turned into an R light and a G light of a P polarized light, and transmitted through a color polarizer (118) to be turned into a G light of an S polarized light and an R light of a P polarized light. These R light and G light are subjected to light modulation in a reflection type spatial light modulation element for G and a reflection type spatial light modulation element for R arranged at unequal distances from a polarization split surface of a polarizing beam splitter (103), and emitted from a projection lens having an axial chromatic aberration corresponding to the unequal distances.

Abstract: An image display apparatus includes a diaphragm (9b) arranged at a pupil position. The shape of an aperture of the diaphragm (9b) is similar to the shape of a light source image formed by an illuminating optical system at the pupil position. An area varying mechanism (90) varies the area of the aperture of the diaphragm (9b) in response to a focal length varying operation of a projection lens (9). This prevents an excessive opening from being formed around a light source image cast by the illuminating optical system, thereby preventing the deterioration of displayed images due to unwanted light that may pass through the excessive opening.

Abstract: A stator for use in a rotating electrical machine is constituted by arranging the prescribed number of stator units in the circumferential direction of a stator core having a circular ring shape. The stator units provide magnetic teeth that project inwardly in the radial direction of the stator core. Coils are wound about the magnetic teeth via insulating members. Each of the insulating members arranges thick portions that slightly project opposite to each other in the width direction of the magnetic tooth, wherein the thick portions are shifted in positions in the thickness direction of the stator core with respect to opposite sides of the magnetic teeth arranged opposite to each other. Thus, it is possible to noticeably improve the space factor in the stator.

Abstract: An armature of a rotating electric machine has a plurality of first magnetic teeth arranged side by side along a circumferential direction of the rotating electric machine and a plurality of second magnetic teeth joined to the first magnetic teeth. A pair of joint portions is formed at both end surfaces of a yoke portion of each first magnetic tooth, the joint portions formed at the facing end surfaces of the yoke portions of each successive pair of adjacent first magnetic teeth together forming a connecting part, whereas a mating part is formed at an outer end surface of each second magnetic tooth. Each second magnetic tooth is inserted between the adjacent first magnetic teeth along an axial direction of the rotating electric machine with the mating part fitted on the connecting part to interconnect the adjacent first magnetic teeth.

Abstract: Artificial graphite particles, having a secondary particle structure in which a plurality of primary particles composed of graphite are clustered or bonded together, and having a layer structure in which the edge portion of the primary particles is bent in a polyhedral shape.

Abstract: There is disclosed a data presentation apparatus including: a data laying table on which data such as a written/drawn draft and solid material are to be laid; an aspheric reflection mirror, disposed above the vicinity of a side part of the data laying table, for obliquely taking an image light of the data laid on the data laying table and reflecting the image light of the data; an image forming optical system which cooperates with the aspheric reflection mirror to form the image light of the data reflected by the aspheric reflection mirror into an image; and an image pickup element for receiving the image light of the data formed into the image by the image forming optical system.

Abstract: The two-stage hydrocracking process of the present invention comprises bringing the first-stage feed oil containing a hydrocarbon component and having a boiling point of 316° C. or higher into contact with the first-stage catalyst in the presence of hydrogen to obtain a first-stage product; separating the first-stage product into heavy component and light component containing the middle distillate products; bringing the second-stage feed oil containing heavy component of the first-stage reaction product into contact with the second-stage catalyst in the presence of hydrogen to obtain the second-stage product; separating the second-stage product into heavy component and light component comprising middle distillate products and recycling part of the heavy component of the second-stage product to the second-stage feed oil. Hydrocracking activity of the first-stage catalyst is higher than hydrocracking activity of the second-stage catalyst.

Abstract: A hydrocracking catalyst has a carrier that has particles of a compound oxide and a binder present between these particles, and at least one metal component selected from Group 6, Group 9 or Group 10 of the Periodic Table supported on the carrier. The catalyst has a median pore diameter of 40 to 100 Å and the volume of pores whose pore diameter falls within a range of 40 to 100 Å is at least 0.1 mL/g. Moreover, the volume of pores of the catalyst whose pore diameter falls within a range of 0.05 to 5 &mgr;m is 0.05 to 0.5 mL/g, and the volume of pores whose pore diameter is 0.5 to 10 &mgr;m is less than 0.05 mL/g. This catalyst is mechanically strong enough for practical use and has a high conversion rate and middle distillate selectivity in hydrocracking of hydrocarbon oils, particularly vacuum gas oil.

Abstract: An optical image pickup device applicable to composite picture without the use of chromakey composition technique is presented.

Abstract: A controlling unit of a library device scans a home position and each stop position by driving a picker unit upward and downward, and controls the position of the picker unit using an average value of two position data. Additionally, the controlling unit measures an entire stroke of a hand unit attached to the picker unit, and corrects the stop position of the hand unit using a ratio of an actually measured value to a design value.

Abstract: The two-stage hydrocracking process of the present invention comprises bringing the first-stage feed oil containing a hydrocarbon component and having a boiling point of 316° C. or higher into contact with the first-stage catalyst in the presence of hydrogen to obtain a first-stage product; separating the first-stage product into heavy component and light component containing the middle distillate products; bringing the second-stage feed oil containing heavy component of the first-stage reaction product into contact with the second-stage catalyst in the presence of hydrogen to obtain the second-stage product; separating the second-stage product into heavy component and light component comprising middle distillate products and recycling part of the heavy component of the second-stage product to the second-stage feed oil. Hydrocracking activity of the first-stage catalyst is higher than hydrocracking activity of the second-stage catalyst.

Abstract: A library apparatus having a rotatable cell drum adapted to store a plurality of recording media cartridges, the cell drum having a plurality of columns and each column having plural cells configured to receive the recording media cartridges. The library apparatus further includes a door configured to selectively provide direct operator access to all of the cells of a selected column without the assistance of a media transport device. The library apparatus is provided with a cell drum locking mechanism configured to selectively lock the cell drum and prevent rotational movement of the cell drum, and a door locking mechanism configured to selectively lock the door and prevent opening of the door. A link operably interconnects the drum locking mechanism and the door locking mechanism such that the cell drum locking mechanism must assume a locked state before the door locking mechanism may assume an unlocked state.