Abstract: A textile machine with multiple workstations equipped with a yarn processing device, and a drive shaft extending along multiple workstations, each yarn processing device connected to the drive shaft by a continuous traction means, and the drive shaft including multiple drive devices each guiding a continuous traction means. Each drive device has two grooves coaxially to the drive shaft, one of the grooves being part of a free wheel about the drive shaft. An output means is connected to each yarn processing device, each output means having front and rear guide grooves, the front groove at a free end of the output means and the rear groove adjacent the associated yarn processing device. Each traction means has one loop engaged in the rear groove of the associated output means and another loop engaged in the front groove through 180 degrees.

Abstract: A device and a process for controlling the motor drives (121) of textile machines, comprising at least one “encoder” (101), capable of controlling the number of revolutions of each motor (121), and at least one central electronic unit (111) processing the data originating from all the motor drives (121), based on an application program containing the synchronizing data between the individual motors (121) and the technological operating parameters of the textile machine.

Abstract: A cabling and yarn double-twisting spindle having pneumatic assistance for a threading up of the yarns to be handled by the spindle is provided. The spindle includes a shaft rotatably supportable in a support hub on a spindle bank. The shaft has a central, axially extending shaft bore, and package top. The package top is secured against rotation and has a hollow spindle axial portion disposed in communication with the spindle shaft bore. A pressurized air injector effects threading up of a yarn component delivered via the hollow spindle axial portion of the package top with another yarn component delivered via the spindle shaft bore, and includes a pressurized air supply conduit in the spindle shaft such that the pulse of air injected by the air injector is operable to produce a suction flow in the hollow spindle axial portion of the package top and in the spindle shaft bore.

Abstract: It is an object of the present invention to provide a hairiness controlling device that can start, simultaneously with the start of spun yarn running, stabilizing a spun yarn run through disks. According to the present invention, a rotation speed of each disk 6 is varied depending on a running speed of a spun yarn Y run as a drive drum D rotates, thereby setting the tension of the spun yarn Y at an appropriate value when the spun yarn starts to run.

Abstract: Play-free and centering tube coupling for the spindle of a textile machine, which includes at least three driving elements which are centrically arranged to bear against an inner wall of the tube in a tube receptacle connected nonpositively to the spindle shank. The tube receptacle includes a basic body having a thrust piece arranged axially moveably therein and an end piece fixedly connected to the basic body. The driving elements are designed as driving elements and arranged so as to be movable predominantly radially between the basic body and the thrust piece. Guide slopes are in contact with the driving elements and are in the form of a conically designed collar are arranged on the thrust piece, and detaining centrifugal elements displaceable predominantly radially are arranged between the thrust piece and the end piece. At least one of the faces of the thrust piece and of the end piece which are in contact with the detaining centrifugal elements is designed as a guide slope.

Abstract: A wire twisting machine and method provide a randomly varying lay to pairs of twisted wires forming a cable. A pair of wires are fed into a motor driven bow mechanism which twists the wires at a given rate of speed. The bow winding speed is sensed to provide a signal to a control system employing a computer which generates a randomly varying signal between a selected minimum and maximum range. The random signal is applied to an oscillator which provides a varying frequency signal to a power supply unit. A pulsed direct voltage signal then controls a stepping motor which applies the randomly varying lay signal to vary the speed of the capstan winding the wires with respect to the independent bow speed. This varies the length of lay of the twisted wires within controlled limits.

Abstract: In an individual-spindle-drive type multiple twister that directly employs separate motors to drive the spindle shafts of each twisting unit, when a spindle is inserted into the housing during motor assembly, a rotor and a stator may attract each other and adhere to each other, and this attraction may prevent the spindle shaft from being correctly inserted into a target bearing, thus making it difficult to assemble the motor. A spindle shaft 4 is rotatably supported by bearings 27a and 28a mounted onto upper and lower supporting members 27 and 28. The distance A between the lower end of the rotor magnet 32 of the drive motor 10 fixed to the spindle shaft 4 and the lower end of the spindle shaft 4 is longer than the distance B between the upper end of the stator coil 31, which is fixed to the housing 34 of the drive motor 10, and the bearing 28a of the lower supporting member 28. In addition, the tip 4 of the spindle shaft 4c is tapered to facilitate insertion.

Abstract: It comprises a bowl (2) driven positively in rotation and a guide finger (3) which is spaced from the bowl (2) and is mounted on an arm (6) articulated relative to a support (7) mounted on the frame of the machine.The shaft (8) supporting the bowl (2) is equipped with a drive roller (12) which, in the working position, bears against a drive shaft extending over the entire length of the machine and common to all the workstations which the latter comprises.The articulated arm (6) is associated with means which, on the one hand, hold the drive roller (12) in bearing contact, with adjustable pressure, against the drive shaft during normal operation and, on the other hand, are neutralized when the articulated arm is moved away from said drive shaft.

Abstract: In an individual-spindle-drive type multiple twister that directly employs separate motors to drive the spindle shafts of each twisting unit, when a spindle is inserted into the housing during motor assembly, a rotor and a stator may attract each other and adhere to each other, and this attraction may prevent the spindle shaft from being correctly inserted into a target bearing, thus making it difficult to assemble the motor. A spindle shaft 4 is rotatably supported by bearings 27a and 28a mounted onto upper and lower supporting members 27 and 28. The distance A between the lower end of the rotor magnet 32 of the drive motor 10 fixed to the spindle shaft 4 and the lower end of the spindle shaft 4 is longer than the distance B between the upper end of the stator coil 31, which is fixed to the housing 34 of the drive motor 10, and the bearing 28a of the lower supporting member 28. In addition, the tip 4 of the spindle shaft 4c is tapered to facilitate insertion.

Abstract: A supporting disk for a rotor of an open-end spinning machine comprising a hub ring made of metallic material and a support ring made of polymer material affixed to the outer circumferential surface of the hub ring, the outer circumferential surface of the hub ring engaging the inner circumferential surface of the support ring. The support ring extends beyond the hub ring in the axial direction on both sides with an equal projecting length.

Abstract: A stranding station (1) for SZ type stranding machines intended for the helical stranding of a plurality of individual wire strands (4a-4g). The stranding station (1) is characterized in that the accumulation element (50) is mounted so as to be free to rotate about and free to move axially along a support shaft (54) driven in rotation, in that the mechanism for driving the accumulation element in rotation includes an intermediate element (60) attached to the support shaft (54), arranged downstream of the accumulation element (50) in relation to the forward motion direction of the wire strands (4a-4g), and in that the intermediate element (60) has a driving surface (62), this accumulation element being driven in rotation by friction on the driving surface (62).

Abstract: A device is disclosed for damping the vibrations of a package on spinning, twisting or winding machines. Damping elements act on the swivel-mounted package holders, which damping elements are arranged on the machine frame and which are effective on the swivel direction of the package holders. The package holders are supported with tube sections on a swivel axle which is secured to the machine, and support the packages, which are pressed onto a driving roller and are rotatably supported thereon. In the swivel direction in which the packages are lifted from the drive roller, the damping is greater than in the swivel direction in which the packages are pressed onto the drive roller. The cylindrical outer contour of each individual tube section is surrounded, at a predetermined angle of contact, by a close fitting brake belt which is actuated by friction. One end of the brake belt is secured in a non-movable way on a stationary mounting, while the other end is secured to a loading spring.

Abstract: A yarn being spun in a spinning station of a spinning machine is drawn off with an apparatus which includes a pair of rollers for clamping the spun yarn in a gap between the rollers and transporting the spun yarn. The rollers include a draw-off roller being driven continuously in a draw-off direction at a given circumferential speed and a switchable feed roller for contacting the draw-off roller and for being driven through friction by the draw-off roller when contacting the draw-off roller. A method for drawing off the spun yarn includes positioning the yarn to be drawn off between the rollers while the feed roller is not contacting the draw-off roller. The feed roller is driven with a fluid in a circumferential direction and accelerated to a circumferential speed being at most the given circumferential speed. The feed roller is then placed in contact with the draw-off roller.

Abstract: The spinning rotor of an open-end spinning device is supported by means of a rotor shaft in the nip of at least one pair of supporting disks and can be driven by means of a tangential belt. A change-over device with a pressure roller is provided to press the tangential belt against the rotor shaft and a rotor brake which can be brought into action alternatively is provided. The change-over device is connected to a control lever which can be controlled as a function of the position of an actuator connected to a spinning station cover. The control lever is provided with an actuating arm. By opening the spinning station cover completely, a sufficient clearance can be produced between the actuator and the control lever so that the rotor brake can be deactivated through action exerted on the actuating arm of the control lever by means of the change-over lever on the one hand without allowing on the other hand the pressure roller to be yet actuated.

Abstract: A drive for a shaftless spinning rotor wherein the spinning rotor is embodied as the rotor of an axial field motor utilizes axially opposed yoke-forming, magnetically conductive elements disposed respectively on the opposite sides of an air gap formed between the spinning rotor and the stator in combination with at least one magnet (preferably either permanent magnets or electromagnets) on one or both the rotor and stator arranged concentrically to one another and to the rotor axis. The present magnet/yoke arrangement does not require exact mutual alignment of oppositely located magnets nor their homogeneous polarization. The present arrangement is self-adjusting because of the generation of a point-symmetrical field which in operation forms a sort of magnetic potential depression. Magnetic drive and guide fields are advantageously decoupled in order to reduce their mutual interference.

Abstract: A rotor spinning machine has a plurality of simultaneously operated spinning stations each with a spinning rotor, an opening roller, a feed roller for delivering sliver to the opening roller, and a stepping motor connect directly to the feed roller for driving thereof. An actuating arrangement is provided for selectively actuating each stepping motor in a normal increment mode during spinning operation and in a microincrement mode during yarn piecing operations.

Abstract: In a roving winding apparatus applied to a roving frame provided with a plurality of draft parts and corresponding bobbin wheels, a bobbin shaft for driving the bobbin wheel, a bobbin rail on which the bobbin shaft is rotatably horizontally mounted along the longitudinal direction thereof, a lifting motion mechanism for lifting the bobbin rail, and a main motor for driving the draft parts at a predetermined rotational speed, wherein the bobbin shaft is driven under a controlled condition created by a servomotor to follow a digital signal output from the rotation angle detecting device applied to the common bottom front roller of the draft parts, in an adjusted optimal condition under the control of a computer system, incorporated with the lifting motion of the bobbin rail.

Abstract: An open-end rotor spinning machine which operates at rotor speeds higher than 100,000 rpm is constructed so that the critical system rotational speed is higher than the 100,000 rpm operating rotational speed. The rotatable rotor has a shaft bearingly supported in the nip between at least two pairs of supporting disks. Each disk has a plastic outer covering around the circumferential surface thereof and preferably is provided with at least one recess along its circumference. An elastic support surface preferably covers the circumference of each disk and is disposed between the disk and its outer plastic covering. The interior distance between the disks is from 20 to 69 mm. A circumferential recess preferably is disposed in at least on of the lateral surfaces of the plastic covering of each supporting disk.

Abstract: A device for the control of an open-end spinning element, including a pivoted control lever (4) is provided which is capable of assuming three different working positions. In a production position the control lever brings a first drive, running at production speed, into driving contact in the operation of the open-end spinning element. In a braking position the control lever brings a brake to act upon the spinning element. The control lever in a piecing position brings a second drive which runs at a lower speed than the first drive into driving contact with the open-end spinning element. At least the positions determining the production and the piecing position of the control lever are provided with a common control element, capable of being moved back and forth in the direction of movement of the free end of the control lever between at least two switching positions.

Abstract: A belt type spindle drive apparatus for textile machines of the type having a plurality of simultaneously driven aligned spindles arranged in at least one row. An endless belt extends in driving engagement along the spindles and is driven by a plurality of belt driving devices. In one embodiment, the belt driving devices have drive rollers offset from the spindle rows and coaxial overlapping input and output rollers that guide the belt to and from the drive roller between adjacent spindles. The paths of the belt entering and leaving the drive devices are offset. When an uneven number of devices is used, a pair of canted auxiliary rollers are used to make the number of belt path offsets even. To accommodate the offset of the guide rollers, one or the other guide rollers can be canted toward the drive roller or the drive roller can be canted. Alternatively, adjacent drive devices can have the same offset relationship and the belt path can be inclined from one drive device to the other.

Abstract: A spindle is provided which is intended especially for use in the mounting arrangement of a spinning rotor within the spinning housing of a textile spinning machine. The spindle comprises an outer sleeve, two rows of balls disposed in cages, and a shaft whose external end portion is adapted to be driven by a drive arrangement for inducing rotary motion. The internal end portion of the shaft is disposed within the outer sleeve and forms a dynamically elastic portion of the shaft having a smaller diameter than that of the main spindle shaft. The spinning rotor is pressed on the dynamically elastic portion of the shaft. Between the rotor space, behind the spinning rotor and a compensation space, a rotary, or non-rotary, gasket is provided which includes a labyrinth knife.

Abstract: The jacket enclosing a motor driven textile spindle of the type wherein the spindle is driven by a separate motor which is mounted on a common base with the spindle is modified to include air inlet and air exit openings. The motor is located in proximity to the spindle and is coupled to it by a toothed belt or the like. As the spindle is rotated by the motor air is drawn in through the inlet opening of the spindle and exits through the exit openings in the form of a strong stream of air which blows on and cools the motor. In this manner the spindle doubles as a fan for the motor and the necessity of providing a separate fan for the motor is avoided, resulting in savings in space and energy for driving a fan.

Abstract: A bearing and driving unit for a spinning rotor of an open-end spinning unit is provided. A braking element is provided for braking a rotor shaft, and a cleaning element is provided for cleaning the rotor shaft. Actuating elements are provided for activating and deactivating the braking element and the cleaning element. The cleaning element is applied to the rotor shaft with a contact force which is controlled independent of a contact force control of the braking element.

Abstract: The invention relates to an open-end rotor-spinning device with a rotor shaft which is mounted and driven in the wedge-shaped gap between supporting disks and to the free end of which is assigned an axial bearing. A simplified mounting, which also allows the supporting disks to be removed and exchanged while the machine is in operation, is provided because the rotor shaft (1) is mounted at two bearing points, of which one is formed by supporting disks (2, 3) arranged in the vicinity of the spinning rotor (10) and the second is a bearing (5) which absorbs axial and radial forces and which receives the free end (11) of the rotor shaft (1). An increase in the operating speed of the spinning rotor (10) without an increase in the running speed of the drive means (6) is achieved as a result of a reduction of the diameter of the rotor shaft (1) in the region of the drive means.

Abstract: In an open-end spinning machine, a centralized main drive is provided to collectively drive spinning elements of a plurality of spinning stations installed next to each other. At each spinning station, a switch-over device is provided for switching each spinning station over to a stationary, centralized auxiliary drive. The main drive includes a main drive belt to collectively drive the plurality of spinning elements. An auxiliary drive belt driven at a second speed for selectively driving individual spinning units is powered by the stationary centralized auxiliary drive. Using its respective switch-over device, either the main drive belt or the auxiliary drive belt can be selected to drive a given spinning unit. Thread joining preferably takes place at a spinning unit (e.g. spinning rotor) speed relatively close to the production speed of the spinning unit so that strong thread joins and consistent thread results.

Abstract: In an open-end rotor spinning machine having a plurality of spinning stations located next to one another, each spinning station has a spinning rotor (40) which is arranged in a housing (1) and has a drive spindle (42) extending transversely to the machine longitudinal direction. This drive spindle (42) is mounted in the gusset portion of a supporting disk bearing (44). The supporting disk bearing (44) is supported by the housing (1) which accommodates the spinning rotor (40) and which is mounted on a swivelling axis (10). The spinning rotor (40) is driven by a drive belt (43) extending in the machine longitudinal direction. The housing (1) can be swivelled away from this drive belt (43) to such an extent that the housing (1) can be removed from its receptacle on the machine side.

Abstract: The process for operation of a spinning or twisting machine calls for a plurality of working units which are concentrated in groups with at least one motor and tangential belt. The spinning or twisting machine has a different total power need based on different total numbers of working units and/or use of working units with different individual power needs. Independently of the total power need of the spinning or twisting machine, all the motors have the same dimensions. The number of motors are selected so that the sum of the nominal power output of the motors at least approximately corresponds to the total power need of the spinning or twisting machine. Each of the motors are associated with a number of the working units such that the sum of the individual power need of the working units corresponds at least approximately to the nominal power of the motor.

Abstract: The apparatus for making textile fiber strands has a principal drive unit and at least one auxiliary drive unit. At least one alternating current motor of the principal drive unit is provided with a supply current of an adjustable frequency by a frequency converter. The frequency converter or at least one of the frequency converters is connectable to at least one alternating current motor of at least one of the auxiliary drive units in an intermediate time interval in which the receiving members of the apparatus for the fiber strands being produced are not loaded with the fiber strands.

Abstract: A bearing and driving assembly is disclosed for an open and spinning rotor unit of a spinning unit of the type having a rotor mounted on a rotor shaft, a twin disk bearing arrangement for rotatably supporting the rotor shaft and a tangential belt drivingly engaging the rotor shaft. A tension roller is loaded against the tangential belt. To minimize failures of such a system caused by a resonant system vibrations and to facilitate high spinning speeds with minimal manufacturing expenses, the supporting disk pairs are axially spaced a distance slightly larger than the axial width of the tension roller. Brake members are disposed below the tangential belt so as to be applied with substantially horizontal movement radially against the rotor shaft.

Abstract: For compensation of changes in rotational speeds, for example, occurring because of varying loads on the motors, the drive mechanisms for at least two kinds of working units have a common synchronizing mechanism and are connected operably by a torque transfer device. The torque transfer device comprises, for example, a drive belt and two drive pulleys, each of which is attached to a different drive mechanism. The common synchronizing mechanism can comprise either a common rotational speed control or an adjustable current supply for the motors of the drive mechanisms.

Abstract: A bearing and driving assembly is disclosed for an open end spinning rotor at a spinning unit of the type having a rotor mounted on a rotor shaft, a twin disk bearing arrangement for rotatably supporting the rotor shaft and a tangential belt drivingly engaging the rotor shaft of the radial side thereof opposite the twin dusk arrangement. To minimize failures of such a system caused by resonant system vibrations and to facilitate high spinning speeds with minimal manufacturing expenses, the assembly is designed so that the system critical velocity where excessive resonant vibrations may occur is substantially lower than spinning operational speeds.

Abstract: A spinning machine having a plurality of adjacently arranged spinning units is provided. Each spinning unit is developed as a construction unit along with at least one part of its related driving mechanism. The construction unit is respectively removable as a whole from the machine frame. The machine frame includes devices which require no high degree of precision in alignment with respect to the individual spinning units. These devices include, for example, air channels and cable channels and furthermore driving shafts with driving elements for slowly running drive mechanisms.

Abstract: A spinning or twisting machine has a plurality of spindles which are rotatable about upright axes aligned in a row and which are each provided with a whorl tangentially engaged by the outer face of a straight stretch of a flat drive belt. This machine is driven by a system comprising a motor having an output pulley rotatable about an upright axis adjacent the flat drive belt, a drive wheel operatively tangentially engaging one face of the flat drive belt at a drive location, and another belt reeved over the output pulley and drive wheel and driving the latter from the former. A pinch roller is operatively engageable with the other face of the flat belt at the drive location and is pressed thereagainst to pinch the flat belt between the pinch roller and the drive wheel.

Abstract: A drive system drives a plurality of whorls rotatable about respective whorl axes and having radially outwardly directed faces centered on the respective axes, forming a discontinuous whorl surface, and of a predetermined whorl width measured parallel to the respective axes. The system has an endless flat drive belt extending past the whorls generally perpendicular to their axes and having a first belt surface radially directly confronting the whorl surface and of a predetermined axial belt width measured parallel to the axes and pusher rollers bearing radially inward against the belt and urging the belt surface toward the whorl surface. A ridge is formed on one of the surfaces, radially engages the other surface, holds the rest of the other surface out of contact with the one surface except at the ridge, and is of a predetermined ridge width in contact with the other surface and measured parallel to the axes equal to at most one-third of the belt width.

Abstract: In the case of an arrangement for disposing and driving a spinning rotor of an open-end spinning unit which, by means of a rotor shaft, is disposed in wedge-shaped gaps formed by two pairs of supporting disks and is driven by a belt looping around it, it is provided that the belt is looped around a driving pulley of an electric motor which, with respect to the supporting disks, is arranged in the area opposite the rotor shaft and which, for the tightening of the belt, is movably held in a guide in a plane extending at least approximately through the wedge-shaped gap. A belt holding device is provided for holding the belt in a relaxed position so that the spinning rotor shaft can be readily axially withdrawn and exchanged without requiring any disassembly of the belt drive.

Abstract: The driving device for the twisting head of an SZ stranding machine assures short switching times with little equipment even for a multi-step change of the rotary motion by associating with one or both magnetic clutches of the twisting head either one driving shaft rotating at changing speed, or at least two driving shafts revolving at constant speed and each having a magnetic clutch for coupling rotation to the twisting head clutch.

Abstract: The device is composed of a spindle (7) which is provided with a drive means (9 and 10), and of a member for providing a twist, in the form of a bell (1), which encloses the spindle and can be rotated about the extended spindle axis. The bell is mounted independently of the spindle and provided with a drive means (5 and 6), which is furnished with a built-in freewheel (4) to enable the bell to rotate more rapidly than its drive means.

Abstract: An assembly of fiber-drawing rollers, used for stretching rovings or fiber bundles in a spinning machine, is divided into a plurality of stages each including an elongate driven roller and a set of coacting counterrollers, the driven rollers being rotated at predetermined relative speeds with the aid of several motors including at least one pair of synchronous motors positively coupled with a drawing roller at opposite ends thereof. These synchronous motors are energized with three-phase current of a frequency determined by the setting of a digitally adjustable frequency selector controlling a solid-state frequency inverter. The selector comprises a frequency divider in the output of a preferably also adjustable source of timing signals which may be a pulse generator driven by a motor coupled with another drawing roller.

Abstract: A multiply effect yarn is wound up from a plurality of strands on a yarn-winding body that is rotated at a variable predetermined speed. Each of the strands is fed via a respective strand-feed element to the yarn-winding body. The feed rate of each of these strand-feed elements can be individually varied, and is established as a function of the rotation rate of the yarn-winding body to maintain a predetermined proportionality between the various speeds. The drive for each strand-feed element comprises a separate pair of variable-speed motors set to operate at different speeds and operated by forward and backward counters so that either the one motor or the other motor of each drive is connected to the respective feed element which can also be connected to a brake, if desired. The various speed rates can rapidly be adjusted, in accordance with the overall drive rate for the yarn-winding body, even during production of the multiply effect yarn.

Abstract: A bearing arrangement is provided for a rotor shaft of an open-end spinning assembly which includes a ball engageable with the end of the rotor shaft opposite the spinning rotor to axially support the same. The ball is wettable by a lubricant supplied by a wick in contact therewith and is supported in a step bearing housing which includes a retainer member having a cup-shaped portion directly engaging the ball at the side thereof opposite the rotor shaft. In order to transmit operational vibrations from the spinning assembly to the ball so as to improve lubrication of the ball by moving the same, the entire step bearing housing means is supported at a component of the spinning assemby in such a manner that the component vibrations are transmitted to the bearing housing, and thence to the retaining member and ball.

Abstract: The shaft of a spinning rotor is journaled for rotation on pairs of rollers, and is urged against the rollers by a drive belt. The end of the shaft away from the rotor has a taper fitted into a corresponding taper of the central hole of a rolling bearing. The shaft may be held in the bearing by a permanent magnet spaced from the end of the shaft, or by an O-ring engaging grooves in extended portions of this shaft and bearing inner ring.

Abstract: A long spinning machine, preferably a ring spinning machine, with a plurality of drawing means, which serve to draw the fiber strands with the drawing means being arranged adjacent to each other and extending lengthwise of the machine the drawing lower rollers of the drawing means formed by a plurality of long roller lines positively connected together at one point by drive gear transmissions which provide predetermined rpm ratios between the roller lines with some of the roller lines connected together by additional drive gear transmission at least at one additional point spaced from the one point to eliminate or substantially reduce torsion in the roller lines.

Abstract: In order to permit an open-end spinning unit to be opened with a relatively small amount of force, there is a swivel lid which covers all parts, without these parts being attached thereto. However in order to enable the opener roller to be stopped when the open-end spinning unit is opened, the opener roller is located in a swivel housing, which swivels when the lid is opened, thereby interrupting the drive of the opener roller, as a wharve of the opener roller lifts away from a tangential belt.

Abstract: A spindle adapted for mounting on the framework of a false twist texturizing machine. The spindle includes a platen having three bosses mounted perpendicularly thereon, the bosses being positioned on the platen to form a triangle. Friction discs are carried on the bosses and overlap one another to define a zig-zag path for the yarn. A two-piece fixed guide tube aligned with the center of the triangle formed by the bosses feeds the yarn into and out from the spindle. A motor pulley is mounted on a lever which pivotally attaches to the platen, the motor pulley being adapted to engage a tangential belt disposed adjacent the platen to impart rotary motion to the pulley. A belt drive interconnects the motor pulley with the bosses to rotate the same. A rod pivots the lever to engage or disengage the motor pulley with the tangential belt and control rotation of the bosses.

Abstract: A spinning rotor for free fibers having axial extraction and a rotatable depending hollow shaft secured thereto and provided with two grooves receiving two rows of balls mounted in cylindrical cages and disposed in fixed exterior rings having oblique contact surfaces. These exterior rings are mounted in the bore of a bearing support and are maintained in spaced relation by a cross-piece of U-shape and an elastic washer, the cross-piece being axially and rotatably immobilized in the bearing support by a clamp or similar element.

Abstract: An open end yarn spinning apparatus wherein the member that includes the collecting surface that, in operation, is rotated while having deposited on it fibers to be spun into yarn includes a shaft which is rotationally supported by shaft-mounted rollers of substantially greater diameter than the diameter of the part of the collecting surface shaft engaged thereby, and wherein an opening roller is mounted on a shaft of one of said shaft-mounted rollers to rotate therewith.

Abstract: A spinning, twisting or spooling machine, especially a draw-twisting machine, wherein the various thread transport rollers are driven by individual electric drive motors, and wherein electric switches and circuitry are provided for the time-staggered actuation of selected sub-groups of drive motors.