摘要:
A spinning pack for dry-wet spinning is provided with a spinneret having not less than 6,000 spinning holes and having an aspect ratio Ra of not less than 2.5 for a spinning hole array of the spinning holes. In a device and method for producing a fiber bundle, a drawing angle of single fibers formed by the single fibers and a spinneret surface of a spinneret is in a range from 87° to 92°, the single fibers being fibers discharged from the outermost spinning holes located in the long side direction of the spinneret and running to a fiber bundle diverting guide provided in a coagulation bath.
摘要:
An optical fiber array is formed by including m number of optical fibers (where, m is a natural number other than 0), an optical fiber aligning member on a surface of which, at least m number of grooves are formed in parallel, and a cover. An end portion of the optical fiber is disposed in the groove of the optical fiber aligning member, and is held by the optical fiber aligning member and the cover. Furthermore, when being held by the optical fiber aligning member and the cover, by setting a line segment which has connected a point on an outer periphery in contact with the cover, of the optical fiber to be a straight line, the optical fiber is supported at three points by the groove and the cover. Moreover, by setting an angle of formation of the groove to be constant for all the grooves, and by setting arbitrarily a depth of the groove to differ, and by setting arbitrarily a cladding diameter of the optical fiber arranged in the groove, a line segment which has connected a center of each of the m number of optical fibers disposed in the groove is set to be an arbitrary non straight line shape.
摘要:
A fast reactor including a reactivity control assembly including a reactor shutdown rod and neutron absorbers, a reactor shutdown rod drive mechanism, and units of neutron absorber drive mechanism. The reactor shutdown rod drive mechanism causes an inner extension tube to fall and release the reactor shutdown rod by a gripper section by turning off the power supply to a holding magnet at the time of scram. When grasping the neutron absorbers, an outer extension shaft is pulled up to allow both of the extension shafts to be inserted. After the outer extension tube gets to a handling head section of the neutron absorber, the outer extension shaft is pushed down to grasp the neutron absorber externally by latch fingers of the gripper section so that the neutron absorber can be moved up and down.
摘要:
A synchromesh automatic transmission includes a lug lock portion which is engaged with a shift lug separately from a shift finger and enables a shift fork to be controlled so as to be located at a neutral position, a shift selector mechanism which achieves a target shift stage by engaging the shift finger with the shift lug of the shift fork corresponding to the target shift stage and displacing this shift fork in a shift direction, and an interlock mechanism which controls a shift fork that is different from the target shift stage so as to be located at a neutral position by displacing the lug lock portion following movement of the shift finger in a selection direction and engaging this lug lock portion with the shift lug of the shift fork that is different from the target shift stage.
摘要:
A repulsive-type magnetic circuit prevents deterioration of magnetic characteristic of magnets due to heat accumulation, and includes: a magnet and plural magnets arranged such that matching poles of the magnet and each of the plural magnets confront each other; a yoke; a pole piece; and a top plate. The pole piece is above the yoke. The top plate is above the pole piece. The magnet is between the yoke and the pole piece. The plural magnets are arranged between the pole piece and top plate. Joule heat generated by the voice coil is hardly propagated, as radiant heat, to one of the plural magnets on the side near the top plate. Accordingly, the temperature of the magnet on the top plate side hardly rises even if radiant heat continuously propagates to the pole piece. This prevents demagnetization of each of the plural magnets, and deterioration of the magnetic characteristics thereof.
摘要:
A thermally assisted magnetic recording method includes the following steps. The recording layer of a magnetic recording medium is irradiated with a laser beam to produce a locally heated region. This heated region is moved by causing the recording layer and the laser beam to move relative to each other. To record desired information, a recording magnetic field is applied to the heated region of the recording layer. The laser beam has a cross section elongated in the direction in which the heated region is moved.
摘要:
A male coupling member is provided that is selectively couplable to a first female coupling member (for 25 MPa, for example) and a second female coupling member (for 90 MPa), which handle different fluid pressures. When the male coupling member is coupled to the first female coupling member, a second O-ring that is provided for the second female coupling member is prevented from being displaced by the fluid supplied from the first female coupling member. A through-hole (70) is provided therein with an O-ring retaining member (82) that is displaceable between an advance position
摘要:
In an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the negative lens group is disposed at an image side of the of the aperture stop, the negative lens group has a cemented lens which is formed by cementing a plurality of lenses, and in a rectangular coordinate system in which, a horizontal axis is let to be Nd and a vertical axis is let to be νd, when a straight line indicated by Nd=α×νd+β (where, α=−0.017) is set, Nd and νd of at least one lens forming the cemented lens are included in both of areas namely, an area which is determined by a line when a lower limit value is in a range of a following conditional expression (1), and a line when an upper limit value is in a range of the following conditional expression (1), and an area determined by following conditional expressions (2) and (3). 1.45
摘要:
In order to make a unit mechanical portion lighter and to cut down the cost of the unit mechanical portion in an optical disc apparatus, the optical disc apparatus of the present invention is configured to include: a chassis which includes a supporting portion that supports an optical pickup, a pickup moving mechanism, and a disc motor, and coupling portions that abut on and are coupled to a tray at plural points, which is formed of a synthetic resin material, and in which the supporting portion and the coupling portions are integrated with each other; and a flexible flat cable which electrically couples between a first circuit substrate fixed to the bottom case side and a second circuit substrate fixed to the tray or the chassis side, and which is arranged between a bottom cover and a bottom case while its plane surface is folded in a state where the tray is inserted into an apparatus body.
摘要:
A heat-assisted magnetic recording method is provided for implementing information recording on a recording magnetic film of a magnetic recording medium rotated around a rotation center. The method includes the steps of: illuminating a recording region in the magnetic film with a laser beam for locally heating the recording region; and applying a recording magnetic field to the heated recording region. The power of the laser beam illuminating the recording region is selected in accordance with the distance between the rotation center and the recording region.