Abstract: A heater body has a total length between 0.8 and 1.2 m, the heater body and heating member are divided into two pieces from upstream side to downstream side of the heat treating apparatus in ratio of length between 1:3 and 1:1.5, the divided upstream heating member (12) is able to heat the upstream heater body (11) at a temperature higher than 370.degree. C., and the downstream heating member (22) is to heat the downstream heater body (21) at a temperature of between 200.degree. and 320.degree. C. or higher than 370.degree. C., the upstream heater body has yarn guides (15) disposed at a longitudinal pitch of at most 30 mm, and the downstream heater body has yarn guides (24) disposed at a longitudinal pitch between 80 and 120 mm.

Abstract: A draw texturing machine comprises a first heater for heating a yarn, a false twisting device for imparting twists to the yarn, and a cooling plate, disposed between the first heater and the false twisting device, for cooling the yarn which has been heated by the first heater and for inhibiting vibration of the yarn so as to allow the yarn to run in a stable manner. The cooling plate is provided with a yarn threading groove member having a bottom portion with which the yarn runs in contact and wall portions connected to the bottom portion to form a concave, downwardly directed opening. The wall portions of the yarn threading groove member are provided with a plurality of holes, and the bottom portion of the yarn threading groove member is provided with no holes.

Abstract: An apparatus for heat treating a synthetic yarn comprises a heater body for completely or partially encircling the synthetic yarn, which is being false twisted or being drawn and false twisted, in a non-contacting condition therewith, a heating member disposed in the heater body for heating the heating wall of the heater body at a high temperature, and yarn guides disposed in a yarn passage surrounded by the heating wall of the heater body. In a first embodiment, the heater body and the heating member are longitudinally divided into at least two sections. In a second embodiment, the yarn guides are provided with yarn guide heating members which are different from the heating member for the heater body.

Abstract: A magnetic medium comprising a substrate formed with a stepped pit and a magnetic substance buried in the stepped pit. A method of manufacturing a magnetic medium comprising the steps of forming a first groove in a substrate by photoetching, forming a second groove in the first groove or in a portion adjacent to the first groove by the photoetching, the second groove being different in depth from the first groove, and burying magnetic substances into the first and second grooves.

Abstract: A magnetic medium comprising a substrate formed with a stepped pit and a magnetic substance buried in the stepped pit.A method of manufacturing a magnetic medium comprising the steps of forming a first groove in a substrate by photoetching, forming a second groove in the first groove or in a portion adjacent to the first groove by the photoetching, the second groove being different in depth from the first groove, and burying magnetic substances into the first and second grooves.

Abstract: In an automatic bobbin changing apparatus of a winding machine having a plurality of work stations disposed along the lengthwise direction of a machine frame, each winding portion of work station is provided with: a yarn treating device including a yarn sucking device (21), a yarn lifting guide (22), a yarn cutting device (24), a yarn gathering arm (61) and yarn threading arm (63) a cradle turning device including a cradle (13) and a cradle turning motor (31); an empty bobbin donning device including an empty bobbin arm (51); and a package receiver (83), and disposed in the winding machine is a control member for operating the yarn treating device, the cradle turning device, the empty bobbin donning device and the package receiver when at least one of packages at the winding portions reaches a state where it is to be changed.

Abstract: A dropper separating mechanism comprising droppers each having an asymmetrical mountain position at an upper end thereof and alternatively superimposed in a first direction so that the asymmetrical mountain portions of two adjacent droppers do not overlap each other, a pushing member provided in a rear side of the droppers to push the droppers forward from the rear side, a pair of movable pawls provided so that they are movable in a second direction perpendicular to the first direction, the pair of movable pawls also being oscillated between a first position in which the mountain portion of a foremost dropper of the droppers is limited to move forward and a second position in which the mountain portion of the foremost dropper is separated, and a fixed pawl to limit a forward movement of a lower end of the foremost dropper.

Abstract: A dropper random-separating mechanism comprising a plurality of dropper rows arranged in parallel, a plurality of pairs of separating pawls corresponding in number to the plurality of dropper rows, each pair of separating pawls being adapted for separating a foremost dropper of the corresponding dropper row so that a predetermined dropper separation space is formed between the foremost dropper and the following droppers of the corresponding dropper row, a plurality of cams provided on a common rotational shaft, each cam being adapted for driving the corresponding separating pawl, a plurality of power transmission units provided between the cams and the separating pawls for forming power transmission paths between the cams and the separating pawls, a drive unit for driving the common rotational shaft so that one separating pawl of the plurality of pairs of separating pawls is actuated by the corresponding cam, and a regulating unit for connecting and disconnecting the power transmission paths.

Abstract: A hydraulic circuit for running a crawler vehicle which comprises a running frame portion provided with motors for running the crawler vehicle and an upper swivel portion turnably disposed on the running frame portion via a swivel joint. Electro-magnetic proportional flow directional control valve (a directional control valves) (15) for controlling the running motors are disposed between the swivel joint (41) and the running motors (19). The number of the high pressure passages in the swivel joint (41) can be reduced, because of increase of pressure resistance, the size of the swivel joint can be small, and accordingly, the hydraulic circuit for running a crawler vehicle can be inexpensive, and possibility for leakage of pressure oil becomes low.

Abstract: A yarn traversing apparatus includes a first traverse member having rotary blades for traversing a yarn from a center toward ends of a traverse stroke, and a second traverse member having rotary blades for traversing the yarn from the ends toward the center of the traverse stroke in order to wind the yarn onto a bobbin to form a yarn package. Guide rails are provided so as to maintain the speed of the yarn constant as it is conveyed by the first traverse member, and to gradually decrease the speed of the yarn from the ends of the traverse stroke to the center of the traverse stroke as it is conveyed by the second traverse member, from a speed that is 1.5 to 7 times that of the first traverse member, to a speed substantially the same as that of the first traverse member.

Abstract: A magnetic-field measuring apparatus comprising a polarizing element for generating polarized light that transmits parallel to the lines of magnetic force of a first magnetic field, a Faraday effect element for generating a banded magnetic domain substantially perpendicular to the transmission direction of the polarized light generated by the polarizing element and for diffracting the polarized light by the banded magnetic domain, a magnetic-field generating unit for generating a second magnetic field having lines of magnetic force which cross at right angles with the transmission direction of the polarized light generated by the polarizing element and are parallel to the banded magnetic domain generated by the Faraday effect element, a position detecting unit for detecting a position at which diffracted light of other than zero-order diffracted by the Faraday effect element is received, and a magnetic-field-intensity detecting unit for detecting a magnetic field intensity of the first magnetic field on the b

Abstract: A multiple processor system comprising a plurality of microprocessors, a plurality of digital filters for making outputs of the microprocessors smooth, the digital filters corresponding in number to the plurality of microprocessors, a failure judgement unit having a comparator for comparing the smoothed output data and judging the presence of failure of the plurality of microprocessors under majority rule, and a selection and output unit for selecting, on the basis of the result of the judgement of the failure judgement unit and a predetermined priority order, an output of the microprocessor in which there is no failure and whose priority order is higher and for outputting the selected output as an output of the multiple processor system.

Abstract: A yarn winding method, which is applicable to a yarn winding device, which is installed in a texturing machine, a draw texturing machine, or a spinning machine, wherein traverse stroke is varied pulsatively, the traverse stroke, number of traverse strokes and winding speed are controlled by separate drive motors which are independent from each other, varying period of the traverse stroke, varying period of the number of traverse strokes and the varying period of the winding speed are basically in synchronism with each other, and at each traverse period, at least one of start points of the varying period of the traverse stroke, of varying period of the number of traverse strokes and of varying period of the winding speed is shifted from the other by a distance within a range of between 0 and 30% of the basic varying period.

Abstract: A spindle device with a built-in motor comprises a casing, a working spindle having a large radius portion formed with a bore and a small radius portion extending from the large radius portion, the large radius portion being housed in the casing, and the small radius portion protruding from the casing and having a working tool mounted thereon, a cylindrical motor rotor attached to an inner surface of the large radius portion of the working spindle, a fixed shaft provided in the casing and loosely inserted into the motor rotor, and a motor stator mounted on an outer surface of the fixed shaft opposed to the motor rotor. The casing is formed with an air passageway having a plurality of injection nozzles which are open at an inner surface of the casing opposed to an outer surface of the large radius portion of the working spindle.

Abstract: A path for guiding bobbin holders (7, 8) is formed in a closed loop shape on a machine frame (1), inner gear members (65, 66) are spaced in an axial direction of the bobbin holders (7, 8) and disposed along the bobbin holders guiding path. Two bobbin holders (7, 8) are supported on sliders (13, 14), respectively, and gear wheels (67a, 67b, 68a, 68b, 69a, 69b, 70a, 70b) disposed at the support portions of the bobbin holders (7, 8) engage with the inner gear members (65, 66). Two endless chains (82, 83) are spaced in an axial direction of the bobbin holders (7, 8) and disposed along the bobbin holders guiding path. The chains (82, 83) are connected to the bobbin holders (7, 8), respectively, whereby the bobbin holders (7,8) can be independently moved along the bobbin holders guiding path formed to locate a winding position, a doffing position, an empty bobbin donning position, a stand by position and a bobbin changing position.

Abstract: A warp supplying apparatus comprising a warp gripping chuck for gripping a leading end portion of a warp thread, a cutter for cutting the leading end portion of the warp thread gripped by the warp gripping chuck, the cutter being provided above the warp gripping chuck, a suction nozzle that is provided below the warp gripping chuck and draws in a cut end portion of the warp thread cut by the cutter, a suction box provided between the warp gripping chuck and the suction nozzle for drawing in and guiding the cut end portion to the suction nozzle, the suction box being formed with a suction chamber and a slit through which the cut end portion is drawn in within the suction chamber by suction, and a warp conveying unit for conveying the cut end portion within the suction chamber from the warp gripping chuck to the suction nozzle.

Abstract: The mechanism has an actuator provided with a piston, a servo control valve which is actuated by electric input and output signals for supplying working fluid to the actuator and exhausting working fluid from the actuator, a slider which closes an oil passage from the servo control valve to the actuator and which temporarily engages with the piston of the actuator via a link mechanism, when a system for transmitting the input and output signals or the servo control valve breaks down, and a centering valve which is constructed in one body with the slider and which stops supply and exhaust of working fluid after the actuator has been returned to its neutral position by supply of working fluid to the actuator when a system for transmitting the input and output signals or the servo control valve breaks down.

Abstract: A motion converting mechanism comprising a feed member provided with a screwed portion, a screw nut member engaging with the screwed portion of the feed member, a support member rotatably supporting the feed member and the screw nut member, drive means for imparting a rotational motion to the feed member, the rotational motion of the feed member being converted into a linear motion through the screw nut member, and a speed control unit provided between the drive means and the screw nut member and constructed such that it rotates the screw nut member in the same direction as that of the feed member and in the direction opposite to the rotation of the feed member so that a speed of the linear motion is variably controlled.

Abstract: An actuator for transducing a rotational movement into a linear movement, which comprises:a drive motor generating the rotational movement;a first input gear connected to an output shaft of the drive motor;a first output gear engaging with the first input gear at a first gear ratio and having an external thread portion;a second output gear engaging with a second input gear at a second gear ratio and having an inner thread portion meshing with the external thread portion;an output member connected to the second output gear and generating the linear movenment; andthe first and second gear ratios being different from each other.

Abstract: A rotary motion to longitudinal motion converting mechanism comprising a passive rack with a plurality of teeth, a plurality of active racks respectively having a plurality of teeth having the same pitch as that of the teeth of the passive rack and meshing with the passive rack, and a plurailty of rotatable crankshafts respectively having eccentric circular portions different in phase from one another and respectively having the active racks supported on the eccentric circular portions in such a manner that the passive rack is moved in its longitudinal direction through the active racks by rotary motions of the plurality of rotatable crankshafts.