Abstract: A method of making slub or thick and thin yarns with twist variation on open end spinning machines by changing the speed of the yarn as it exits from the rotor of the open end spinning machine. The method produces a unique slub yarn which has a portion of high twist adjacent the slub in the yarn which has lower yarn twist.

Abstract: An apparatus for twisting and winding strand onto a rotating bobbin comprises a spindle and an open top pot both mounted for coincident rotation about a common axis. A lower portion of the spindle extends outside the pot and is journalled in a set of low friction bearings. The bobbin is provided with a pair of sleeve bearings so that the bobbin is rotatable about the spindle. On the inner wall of the pot, a strand hook is provided to guide strand material onto the rotating bobbin. During operation, a strand is continually supplied to the apparatus at a constant lineal rate as the spindle and pot are rotated by a first motor thereby imparting twist to the incoming strand. The strand hook is axially reciprocated to traverse the strand along the length of the bobbin so as to distribute the strand in successive layers thereon. A second motor, mounted inside the pot, rotates the bobbin relative to the pot for winding the strand.

Abstract: A twisted pair of wires is produced by drawing two insulated wires from two supply reels while rotating one wire supply reel about the other. A capstan and tachometer measure the linear rate at which the twisted pair is being drawn. The output of the tachometer is controllably and variably divided and used to control a power inverter that drives a motor which rotates the one wire supply reel about the other. The variable ratio between the linear wire movement and the rotary or twisting movement is controlled by a random generator producing a series of numbers representing length per twist of the twisted pair, between fixed limits.

Abstract: An open end spinning machine in which each spinning unit is housed in a bipartite housing, each part of the housing having cooperating contact and counter-contact surfaces for forming a sealed housing.

Abstract: An apparatus is operative for processing yarns, filaments or other such elongated elements. An arrangement for controlling the travel of such elongated element includes a device for determining the number of elements breakages occurring per unit time and for generating a corresponding breakage-frequency signal, a device for establishing a reference breakage frequency, and a mechanism for automatically varying the speed of yarn travel as a function of the discrepancy between the reference breakage frequency and the breakage frequency indicated by the breakage-frequency signal.

Abstract: An open-end spinning machine system containing a plurality of spinning units, the components of each unit including a spinning turbine, a breakup roller, a feed roller, a yarn extraction device and yarn wiping apparatus, is controlled during stopping and subsequent restarting by an automatic control system which is operated by switching members in such a manner that, during stopping of the system, the turbine, feed roller, yarn extraction device and winding device of each unit are first permitted to decelerate in unison, in a free rundown manner while the rotating speeds remain within the range permitting yarn spinning to continue, and these components are positively braked only when their speeds approach the lower limit of such range, while during restarting of the system, the yarn extraction device and the yarn winding device of each unit are caused to rotate through a selected distance in the direction opposite to their normal operating direction for feeding a fixed length of yarn back into the associated

Abstract: System for journalling a high speed rotary shaft in which a spherical fluid dynamic cap bearing is adapted to receive an end of the shaft. A magnet arrayed in the vicinity of the cap exerting a force axially on the shaft. The shaft is provided with magnetic material cooperation with the magnet, so that that the shaft is drawn and/or pushed into the bearing.