Abstract: A yarn tensioning unit for use in a textile machine that includes a shaft having a pulley mounted for rotation thereon over which yarn is conducted. A pneumatic cylinder is slidably mounted on the shaft which contains a piston that is affixed to the shaft to form an expandable chamber with one end wall of the cylinder. The opposite end wall of the housing is magnetically coupled to the pulley to establish a magnetic brake for the pulley. The spacing between the cylinder end wall and the pulley is adjusted by controlling the flow of fluid into and out of the expandable chamber to vary the magnetic braking force exerted upon the pulley.

Abstract: A tension control unit for filamentous material applies a stable tension to filamentous material and is useful to adjust the tension easily at a low cost. The control unit supplies filamentous material from a supply source to a coil winding device while applying a given tension to it via a primary tension pulley to which damping torque is applied and a secondary tension pulley arranged at a swinging end of a tension bar biased in a direction to apply tension. The control unit includes a damping torque generator for applying damping torque to the primary tension pulley in the form of a magnetic disk which rotates integrally with the primary tension pulley and permanent magnets arranged at a given distance at least from a surface of the magnetic disk. The control further includes a stationary torque setting apparatus for setting the damping torque in a steady state by moving the permanent magnets in a radial direction of the magnetic disk.

Abstract: The balance of rotors for dynamo-electric machines (e.g., electric motor armatures), which are wound with two diametrically opposite, simultaneously applied coils of wire, is improved by ensuring that wire is fed to both coils in substantially similar quantities. This can be accomplished by monitoring the lengths of the two wires as they are fed to the armature using wire sensors located adjacent to the flyer. Alternatively, wire sensors can be provided to monitor the rate at which wire is being fed towards respective flyers and to measure the rate of change of the lengths of those portions of the wires that are supported by the winding machine dancer arms. A control system processes the measurements from these sensors. A wire tensioner having a hysteresis clutch is also provided that allows the tension applied to a wire being wound to be adjusted rapidly. The wire tensioner also picks up slack that may develop in the wire.

Abstract: An apparatus for imparting a braking force to an advancing strand is disclosed, and which includes a mechanical compensating arm brake followed in series by a movement dependent brake. The movement dependent brake may take any one of several forms, including an eddy-current brake which is directly connected to a roll which is driven by the strand, a hysteresis brake which is directly connected to a roll which is driven by the strand, or a brake of any type which is connected to a roll which is driven by the strand via a clutch, such as a centrifugal clutch, which is operated as a function of the speed of the movement of the strand.

Abstract: A ferromagnetic material on an optical fiber assures that the fiber is held n a proper position on a spool by a magnetic field. This stabilizes the optical fiber during winding to permit an automation of the spooling process and provides a constant force for holding the spooled optical fiber during storage. The constant and predictable holding force helps assure a constant and predictable peel force during deployment of the optical fiber.

Abstract: A tensioning apparatus for setting and controlling the level of a tension on a wire in a coil winding machine. The apparatus includes a rotatable main tension pulley which applies a tension to the wire, a magnet brake for applying a braking torque to the main pulley, and an auxiliary tension pulley contacting a portion of the wire on the downstream side of the main tension pulley as viewed in the direction of movement of the wire. A rotationally urged tension bar having one end rotatably carrying the auxiliary tension pulley is rotationally urged by a spring in such a direction as to tense the wire, thereby resiliently absorbing a variation in the tension of the wire. The apparatus further comprises a brake force adjusting mechanism for adjusting the effect of the magnet brake, and a back tension adjusting mechanism for adjusting the force of the spring to enable adjustment of the urging force acting on the tension bar.

Abstract: A wire tensioner, for feeding wire from a wire source to a wire handling machine such as a coil winding machine, comprising a tension pulley coupled with an output shaft of a motor via a clutch such as an electromagnetic powder clutch with a variable torque transmission capability. Wire is passed around the tension pulley which is turned by the motor in the direction opposite to the feeding direction of the wire. By controlling the torque transmission ratio of the clutch, the tension of the wire is controlled with a fast response. This tensioner can be advantageously used for a motor coil winding machine to removing any slacking in the coil wire and improving the wire density of the motor coils.

Abstract: A yarn tension device of the type including three rollers mounted freely rotatably on a support housing, at least one of these rollers being subjected to the action of an adjustable permanent-magnet braking system (or magnetic brake), and the yarn, during its movement being deflected around the periphery of the rollers, the movement of the yarn upstream and downstream of the tension assembly being executed in a common direction called the "running axis". The rollers are mounted on the support housing in such a way that:first and second rollers, called "entry rollers" are arranged in the vicinity of the yarn introduction zone such that their axes are on either side of the running axis and are maintained in contact, at least one of these rollers having an adjustable braking device; anda third roller, called an "exit roller", itself is positioned downstream of the first and second rollers in the direction of travel of the yarn, its surface being tangent to the running axis.

Abstract: An automatic winder is provided with a tension sensor for detecting the tension of travelling yarn in each winding unit and a tensor for controlling the tension of yarn in accordance with a yarn tension variation signal provided from the tension sensor, to thereby eliminate the variation of yarn tension.

Abstract: A magnetic rotary locking mechanism for locking a plate or sheet-like member by placing it in tension which may be adapted to provide a self-tensioning locking device for securing a printing plate to a printing cylinder in a rotary printing press. The base and rotatable bar each have formed therein a plurality of magnetic strips which generate a plurality of magnetic fields so that the bar magnetic fields are attracted to the base magnetic fields at a first angular position of the bar with respect to the base and are repelled by the base magnetic fields at a second angular position of the bar with respect to the base.

Abstract: A textile apparatus is disclosed wherein a cylindrical package of strand material is mounted on an elongated hollow spindle and the strand material is withdrawn from the package and through the hollow spindle for further processing. A flyer arm is mounted on an extremity of the spindle for rotation thereabout with the arm extending radially outwardly of the spindle to overlie the outer circumference of the package. An adjustable strand tensioning device is mounted on the flyer adjacent the longitudinal axis of the spindle and longitudinally spaced from the end of the spindle and within an envelope defined by the path of movement of the strand material as it is guided by the flyer arm from the package into the hollow spindle.

Abstract: A wire payoff apparatus includes first and second wire spools, having first and second rotatable payoff caps thereon, respectively, first and second enclosure drums around the spools, respectively, first and second drive mechanisms for rotating the payoff caps, respectively, and a brake assembly. The apparatus further includes first and second diameter sensors for sensing the wound diameters of the spools, respectively, first and second line sensors for sensing the payoff of line from the first and second spools, respectively, a line speed sensor and a control. During operation of the apparatus, wire is alternatively payed off from the first spool or the second spool by passing over the respective payoff cap thereof as the payoff cap is rotated and the wire is passed outwardly through the respective enclosure drum to the brake assembly.

Abstract: A pre-take-up roller mechanism is provided for varying the tractive force and tension on running thread being wound by a take-up mechanism in a thread processing machine. The mechanism includes a variably driven rotating drive shaft carried by the machine, a thread pre-take-up roller rotatably mounted on the drive shaft for receiving the running thread on the surface thereof and for being driven by the running thread through adhesion, and an eddy current clutch or a combination eddy current and hysteresis clutch operatively connecting the drive shaft and the pre-take-up roller for varying the torque on the pre-take-up roller and thus the tractive force and tension on the running thread by varying the driven rotational speed of the drive shaft without affecting the constant winding speed of the running thread being wound by the take-up mechanism.

Abstract: A magnetic tensioning device comprises a main tension pulley to which a braking torque is applied, an absorbing lever for absorbing fluctuation in tension and a second tension pulley mounted at one end of the absorbing lever. Adequate tensioning is obtained by means of the main and second tension pulleys. The braking torque is generated by a permanent magnet and a magnetizable disc opposed to each other. When tension is received at the absorbing lever, it displaces and the distance between the magnet and the magnetizable disc is changed according to the displacement of the lever to generate a correcting braking torque.

Abstract: The tension imparted to an advancing strand 11 is regulated by passing the strand about a permanent magnet sheave 13 interposed between a pair of permanent magnet discs 19 and 21. The sheave and discs are axially polarized so that the magnet fields about the sheave are in opposing or repelling relation with the magnetic fields about the discs. By moving (26, 27 and 28) a disc toward or away from the sheave the intensities of the coupled lines of magnetic force are increased or decreased to accordingly vary the magnetic drag placed on the sheave and thus the tension imparted to the advancing strand 11.

Abstract: A guide device for tape-like recording media, especially a reversing guide device for magnetic tapes, that are transported at high speed, which comprises at least one guide roll, around whose periphery the recording medium is guided, and which is rotatably mounted in bearings, a deliberate specific braking torque being produced between the guide roll and its bearings. Further embodiments concern the roughness of the roll's peripheral surface, the design of flanges for the lateral guidance of the recording medium and the use of two guide rolls. The braking torque is produced by braking means acting on the guide roll. The novel guide device can be used advantageously in any high-speed magnetic tape transport apparatus for the recording/reproduction of any type of audio, video or data signal.

Abstract: Equipment for use in washing articles such as egg trays and the like wherein the articles after being washed are moved by a conveyor to a drying zone for being picked up by a rotatable carriage by which they are lifted into a hood and rotated at high speed to discharge water or other washing liquid therefrom. The movement of the conveyor and the rotation of the carriage are coordinated to start and stop the rotation of the carriage so as to dry one article after another as it is advanced to the drying zone and onto the carriage by the conveyor. The rotatable carriage includes a system for orientation of the trays or the like for discharge to the conveyor and a brake assembly for quickly decreasing the rotational velocity of the carriage.

Abstract: A false-twisting apparatus for producing crimps in filament yarns, comprising: a first group of endless belts each having a straightly extending region between two spaced pulleys; about which it is entrained a second group of belts arranged in vertically zigzag fashion relative to the belts of the first group and each belt of the second group having a straightly extending region between two spaced pulleys about which it is entrained. The straightly extending regions of the second group of belts are positioned in vertical zig-zag and parallel fashion relative to the adjacent similar regions of the belts of the first group the belts of the second group are driven to travel in a direction opposite to that of travel of each of the belts of the first group.