Abstract: A machine tool includes a rotation indexing device and an abnormality determination device. The rotation indexing device including a clamp device configured to maintain a rotary shaft at an indexed angular position and an air purge device configured to supply compressed air to a space within a frame. The abnormality determination device includes a pressure sensor configured to output a pressure signal according to a pressure in a supply pipe conduit of the air purge device, and a determinator configured to determine presence or absence of an abnormality, based on the pressure signal from the pressure sensor.

Abstract: A machine tool includes a rotation indexing device and an abnormality determination device. The rotation indexing device including a clamp device configured to maintain a rotary shaft at an indexed angular position and an air purge device configured to supply compressed air to a space within a frame. The abnormality determination device includes a pressure sensor configured to output a pressure signal according to a pressure in a supply pipe conduit of the air purge device, and a determinator configured to determine presence or absence of an abnormality, based on the pressure signal from the pressure sensor.

Abstract: The purpose of the present invention is to provide a glass sheet composite having satisfactory acoustic performance. The present invention relates to a glass sheet composite including a diaphragm that is vibrated by a vibrator, and a support member that is attached along an edge portion of the diaphragm to support the diaphragm, in which the diaphragm includes at least one glass sheet, and is supported on the support member through a fixing part that fixes the edge portion of the diaphragm to the support member, and a vibration-permitting part that permits vibration of the diaphragm.

Abstract: A ball bearing is provided which includes inner and outer races each having a raceway groove; balls; and a retainer made of a synthetic resin, and in which abnormal noise is reduced. Either the raceway groove of the inner race, or each of the raceway grooves of the inner race and the outer race has a radius of curvature which is 104% or more and 109% or less of the radius of each of the balls.

Abstract: An interior panel to be suspended and supported movably along a railway laid on a ceiling portion of a building, including: an upper panel member; a lower panel member disposed below the upper panel member; and a frame including at least an upper frame to be attached movably along the railway and a lower frame configured to hold a lower edge portion of the upper panel member and to hold an upper edge portion of the lower panel member.

Abstract: A ball bearing is provided which includes inner and outer races each having a raceway groove; balls; and a retainer made of a synthetic resin, and in which abnormal noise is reduced. Either the raceway groove of the inner race, or each of the raceway grooves of the inner race and the outer race has a radius of curvature which is 104% or more and 109% or less of the radius of each of the balls.

Abstract: The purpose of the present invention is to provide a glass sheet composite having satisfactory acoustic performance. The present invention relates to a glass sheet composite including a diaphragm that is vibrated by a vibrator, and a support member that is attached along an edge portion of the diaphragm to support the diaphragm, in which the diaphragm includes at least one glass sheet, and is supported on the support member through a fixing part that fixes the edge portion of the diaphragm to the support member, and a vibration-permitting part that permits vibration of the diaphragm.

Abstract: An interior panel to be suspended and supported movably along a railway laid on a ceiling portion of a building, including: an upper panel member; a lower panel member disposed below the upper panel member; and a frame including at least an upper frame to be attached movably along the railway and a lower frame configured to hold a lower edge portion of the upper panel member and to hold an upper edge portion of the lower panel member.

Abstract: A synthetic resin retainer includes two annular members having opposed surfaces opposed to each other and each formed with a plurality of pockets which are circumferentially spaced apart from each other, and in which the balls are received. Each annular member includes axially concave, arc-shaped pocket wall portions defining the inner surfaces of the pockets, and flat plate-shaped coupling plate portions coupling together the adjacent pairs of the pocket wall portions. The coupling plate portions have axial thicknesses of 30% or less of the diameters of the balls, and the pocket wall portions have, at deepest points of the pockets, thicknesses of 10% or less of the diameters of the balls.

Abstract: A synthetic resin retainer includes two annular members having opposed surfaces opposed to each other and each formed with a plurality of pockets which are circumferentially spaced apart from each other, and in which the balls are received. Each annular member includes axially concave, arc-shaped pocket wall portions defining the inner surfaces of the pockets, and flat plate-shaped coupling plate portions coupling together the adjacent pairs of the pocket wall portions. The coupling plate portions have axial thicknesses of 30% or less of the diameters of the balls, and the pocket wall portions have, at deepest points of the pockets, thicknesses of 10% or less of the diameters of the balls.

Abstract: To provide multiple glazing for a building window, which is thin in thickness and light in weight and which is capable of suppressing scattering of fragments as much as possible when broken. In multiple glazing 10 for a building window, a glass sheet 20 arranged on the indoor side has first and second main surfaces 21a, 21b, and an edge 22, and has a surface compression stress formed at the main surfaces 21a, 21b by chemical tempering and has a tensile stress formed inside. The glass sheet 20 has a sheet thickness of from 1.0 to 2.5 mm; the value of the surface compression stress is from 400 to 900 MPa; the value of the tensile stress is from 1 to 25 MPa; and the thickness in the sheet thickness direction of the compression stress layer at the main surfaces 21a, 21b is from 7 to 25 ?m.

Abstract: A retainer of synthetic resin is provided in such a way that abnormal heat generation in a bearing and wear of the retainer due to interference between the retainer and balls are less likely to arise while the bearing is rotating at a high speed. A retainer (5) of synthetic resin includes two annular members (10) made of synthetic resin and facing each other in the axial direction, the annular members defining therebetween a plurality of circumferentially spaced apart pockets (11) in which respective balls (4) are received. Concave spherical surfaces (23) are formed at the circumferential ends of the respective pockets (11) so as to extend along the outer peripheries of the balls (4), and cylindrical surfaces (22) are formed at the axial ends of the respective pockets (11).

Abstract: A retainer of synthetic resin is provided in such a way that abnormal heat generation in a bearing and wear of the retainer due to interference between the retainer and balls are less likely to arise while the bearing is rotating at a high speed. A retainer (5) of synthetic resin includes two annular members (10) made of synthetic resin and facing each other in the axial direction, the annular members defining therebetween a plurality of circumferentially spaced apart pockets (11) in which respective balls (4) are received. Concave spherical surfaces (23) are formed at the circumferential ends of the respective pockets (11) so as to extend along the outer peripheries of the balls (4), and cylindrical surfaces (22) are formed at the axial ends of the respective pockets (11).

Abstract: Each of an outer ring, an inner ring, and a ball is a rolling contact member formed of a ?-sialon sintered body inexpensive, capable of reliably ensuring sufficient durability, and capable of being used in an application where an imposed load is changed abruptly. The sintered body contains as a main component ?-sialon represented by a compositional formula of Si6-ZAlZOZN8-Z and satisfying 0.1?z?3.5, and has a remainder formed of an impurity. The rolling contact member has a Young's modulus of 180 GPa or greater but 270 GPa or smaller.

Abstract: A snap cage (5) includes an annular cage body having a plurality of pockets (11) defined therein at respective circumferential locations for retaining a corresponding number of balls. Each of the pockets (11) also has an inner face formed with a recessed area (16) extending from a pocket open edge on a cage inner diametric side towards a cage outer diametric side.

Abstract: Each of an outer ring, an inner ring, and a ball is a rolling contact member formed of a ?-sialon sintered body inexpensive, capable of reliably ensuring sufficient durability, and capable of being used in an application where an imposed load is changed abruptly. The sintered body contains as a main component ?-sialon represented by a compositional formula of Si6-ZAlZOZN8-Z and satisfying 0.1?Z?3.5, and has a remainder formed of an impurity. The rolling contact member has a Young's modulus of 180 GPa or greater but 270 GPa or smaller.

Abstract: In a contact type seal arrangement for a rolling bearing, it is aimed to reduce torque and improve sealability by improving the lip structure of each seal member. Each seal member 11 has a branch portion 15 at substantially the same height as the land 3 of the inner ring. A main lip 16 is defined by its portion extending radially inwardly from the branch portion 15. The tip of the main lip 16 is brought into contact with the outer groove wall 21 of the seal groove 4 to define a contact seal 25. An auxiliary lip 17 is defined by a portion extending axially inwardly from the branch portion 15. A labyrinth seal 19 is defined between the tip of the auxiliary lip 17 and the inner groove wall 18 of the seal groove 4.

Abstract: An improved magnetic recording medium is disclosed, particularly a magnetic tape suitable for sound recording and video recording, which comprises as a recording element a mixture of cobalt-containing iron oxide magnetic particles consisting essentially of ferromagnetic iron oxide particles containing cobalt and optionally a divalent iron in the most outer layer thereof, and .gamma.-ferric oxide particles in the ratio of 10:90 to 50:50 by weight, said mixture of cobalt-containing iron oxide magnetic particles and .gamma.-ferric oxide particles being applied to a substrate (e.g. a polyester film) with a binding agent. The magnetic recording medium has excellent electromagnetic transducing properties and improved charging properties and is useful for conventional magnetic recording apparatus used at normal position with high sensitivity in wide range of frequency.