Abstract: A computer room air-conditioning system includes a temperature detection unit which is provided for each of a front and a back of each rack, and measures air temperatures of the front and the back; and a control device for acquiring a measured temperature by each temperature detection unit, and performing control based on the measured temperature. With the configuration, the control device includes a temperature difference calculation unit for calculating a temperature difference between cool air at the front and warm air at the back of each rack based on each measured and acquired temperature; and a heating element cooling control unit for controlling by adjustment an amount of flow of cool air from the underfloor space to the computer room based on the calculated temperature difference.

Abstract: A vibrator is received within a case and the case is contained in a containing portion. Further, the case is arranged to be supported by the surrounding terminals having first ends thereof embedded in the containing portion. By virtue of the described configuration, the vibrator is securely retained by the case even if strong vibrations are applied to the terminals. With this configuration, an angular velocity sensor ensuring the strength to retain the vibrator even if the vibrator is reduced in size and causing no degradation of the output characteristic even when subjected to strong vibrations can be provided.

Abstract: A transmission-roller supporting mechanism on a transmission apparatus of a wedge roller type is provided with: an input roller; an output ring; three transmission rollers in an unequally-spaced space generated between the input roller and the output ring; and a support roller. At least one of the three transmission rollers is not fixed in position and is regarded as a movable roller supported by the support roller with its position fixed or movable. The rollers become out of contact with each other by moving the position of the support roller. The transmission of torque is cut off by moving the movable roller by the support roller. Alternatively, two transmission rollers are supported by the support roller. The two movable rollers select and play the roles of a fixed roller and a wedge roller, which causes the transmission of two-way torque.

Abstract: A rolling friction transmission apparatus of a wedge roller type is provided with: a rolling-surface-shaft; a ring; and three transmission rollers in an unequally-spaced space generated between the rolling-surface-shaft and the ring. The two of the three transmission rollers are fixed, and the rest is used as a wedge roller supported with its axis rotatable. The wedge roller is placed at a spatial position where the unequally-spaced space is wider than in the middle of the spatial position where the unequally-spaced space is at the widest and the spatial position where the unequally-spaced space is the narrowest. Friction forces generated by torque on the contact surfaces among the rolling-surface-shaft, the ring, and the transmission rollers cause large normal forces on the contact surfaces.

Abstract: An angular velocity sensor structured so as to reduce the application of external vibrations to tuning fork as described below. Supporting plate having plate having placement part for placing first rubber body over the top face thereof is placed above the top face of second base via at least two supports so as to provide space between the top face of second base and the supporting plate. First cover and fist base housing tuning fork are placed on first rubber body. Further placed on first cover is second rubber body. The top face of supporting plate and the inner ceiling of second cover compress and hold first rubber body and second rubber body therein.

Abstract: A drive arrangement clamps an output disc such as a tire with two driving rollers so as to drive the output disc. The drive arrangement is compact, light-weight, low-noise and inexpensive, and can be used for a bicycle equipped with an electrical assist drive or various kinds of welfare-specific vehicles. The drive apparatus includes an input shaft and two output shafts extending in a single plane in parallel to each other. The input shaft has an input roller, and each of the output shafts has an output roller. A loading roller is located between the input roller and one of the output rollers, and an axis of the loading roller is slightly spaced from the plane of the two output shafts. An outer peripheral surface of each roller is a substantially cylindrical rolling surface. The loading roller is preloaded by a preload spring such that it squeezes between the input roller and one of the output rollers.

Abstract: A drive arrangement clamps an output disc such as a tire with two driving rollers so as to drive the output disc. The drive arrangement is compact, light-weight, low-noise and inexpensive, and can be used for a bicycle equipped with an electrical assist drive or various kinds of welfare-specific vehicles. The drive apparatus includes an input shaft and two output shafts extending in a single plane in parallel to each other. The input shaft has an input roller, and each of the output shafts has an output roller. A loading roller is located between the input roller and one of the output rollers, and an axis of the loading roller is slightly spaced from the plane of the two output shafts. An outer peripheral surface of each roller is a substantially cylindrical rolling surface. The loading roller is preloaded by a preload spring such that it squeezes between the input roller and one of the output rollers.

Abstract: A spool valve for changing transmission ratio for a toroidal type infinitely variable transmission is composed of, a valve housing tightly attached to a fixed member and leaving internal fluid passages, a spool is disposed in the housing and is slidable in an axial direction so as to confront with the various fluid passages to control the supply of pressurized fluid, and a cam follower made as a discrete member from the spool is disposed between the spool and a cam face to reduce the amount of displacement of the spool. The relative position of the spool with respect to the fluid passages is changed by a transmission ratio setting means to prevent the valve housing itself from displacing during the transmission ratio controlling operation.

Abstract: An infinitely variable traction roller transmission having a housing, an input shaft and an output shaft rotatably and coaxially supported on the housing, an input toric disc and an output toric disc fitted on the input and output shafts, respectively, and engaged with the shafts for rotation therewith, the opposed surfaces of the toric discs cooperating with each other to form a toroidal cavity, a plurality of traction rollers disposed in the toroidal cavity symmetrically with the axes of the input and output shafts, trunnion devices rotatably supporting the traction rollers and supported by the housing for pivotal movement about a pivot axis perpendicular to the axis of rotation of the traction rollers, and pressing means for urging the input and output toric discs and the traction rollers against each other to bring them into engagement with each other and cause a traction force to be produced, is provided with a supporting device for mounting the trunnion devices on the housing for slight movement in the

Abstract: A constant velocity universal joint comprises an outer member having an inner partial concave spherical surface with a plurality of lengthwise grooves therein, an inner member inserted in the outer member and having an outer partial convex spherical surface with a plurality of lengthwise grooves therein, a plurality of balls retained in corresponding opposed pairs of the grooves of the two members and serving to transmit a torque between the two members, and a cage disposed between the two members for receiving the balls. The bottoms of the grooves of the two members are arcuate, the grooves of each member having a respective arc center. The arc centers are offset by substantially equal amounts to opposite sides of the central plane of the joint, and the spherical centers of the inner and outer spherical surfaces are also offset by substantially equal amounts to opposite sides of the central plane.

Abstract: An infinitely variable traction roller transmission having a housing, input and output shafts rotatably and coaxially journaled to the housing, input and output toric discs mounted on the input and output shafts and rotatable together while being firmly engaged with the shafts, the opposed surfaces of the toric discs cooperating with each other to form a toroidal cavity, a plurality of traction rollers disposed in the toroidal cavity symmetrically with the axis of the input and output shafts, a trunnion device rotatably supporting the traction rollers and pivotably supporting the vicinity of a pivot axis perpendicular to the rotational axis thereof, and forcing means for firmer engaging the input and output toric discs with the traction rollers and generating a traction force, is provided with a support device for mounting the trunnion device on the housing for slight movement in the direction of the pivot axis, a displacing device provided at the end of the pivot axis of the trunnion device to displace the t

Abstract: A speed control device of a toric type infinitely variable transmission having a housing, an input and an output shaft rotatably and coaxially supported by the housing, an input and an output disc fitted on the input and output shafts, respectively, and engaged with the shafts for rotation therewith, the opposed surfaces of the discs cooperating with each other to form a toroidal cavity, left and right traction rollers disposed in the toroidal cavity symmetrically with respect to the axis of the input and output shafts, trunnion devices rotatably supporting the traction rollers and supported by the housing for rotation about pivot axes perpendicular to the axes of rotation of the traction rollers, and pressing means for urging the input and output discs on the traction rollers into engagement with each other and causing a traction force is characterized by a support device for supporting respectively pivot shaft ends so that the pivot shafts of the left and right trunnion devices are slightly tiltable, and a

Abstract: An infinitely variable toric transmission has a housing, input and output shafts rotatably and coaxially supported in the housing, toric input and output disks fitted on and engaged with the input and output shafts, respectively, for rotation together, the opposed surfaces of the disks cooperating with each other to form a toric cavity, two right and left traction rollers disposed in the toric cavity symmetrically with respect to the axis of the input and output shafts, trunnion devices rotatably supporting the traction rollers and supported in the housing through upper and lower support link members for rightward and leftward pivotal movement about a pivot axis perpendicular to the rotational axes of the traction rollers, and pressing means for abutting the input and output disks and the traction rollers into engagement with each other and generating a traction force.

Abstract: A thrust ball bearing using balls as the rolling members of the bearing comprises first and second races having track grooves having a cross-sectional radius slightly greater than the radius of the balls, a retainer for retaining the balls interposed between the first and second races, and a third race circumscribing the balls and positioning the balls slightly inwardly of the track diameter of the bearing.