Abstract: A core thread is combined with staple fiber in a spinning rotor by feeding the core thread to form a loop in the fiber collection surface while feeding and withdrawing the core thread in a manner to maintain it substantially linear, and the stable fiber is spun into an outer yarn shroud twisted about the axis of the core thread. The core thread feed tube is located at one side of and spaced from a diametral plane through the fiber collection surface, and the fiber feed tube is located at the opposite side of and spaced from such plane through the fiber collection surface. A loop is formed in the core thread by delaying startup of drawoff rollers for a predetermined interval after startup of core thread supply rollers, and the loop is laid on the circumference of the fiber collection surface by rotation of the spinning rotor.

Abstract: In a rotor spinning machine having a multiplicity of spinning stations and sliver containers disposed in tandem in two rows, a device for replacing the sliver containers includes a rotary table having means for carrying four sliver containers for a respective group of four spinning stations.

Abstract: A control system for the pneumatic treatment of yarns, for example, self-twist yarns, includes a pneumatic-hydraulic transducer which converts a control signal related to the speed of the yarn supply means into variations in hydraulic pressure. The transducer is connected to a hydraulic manifold which has branch hydraulic lines leading to hydraulically controlled pneumatic valves. The pneumatic valves control the flow of compressed air to yarn air treatment devices such as jet twister devices.

Abstract: Apparatus movable along a spinning frame to doff full bobbins from the spindles thereof and to don empty bobbins onto such spindles. Low pressure pneumatic sensors are provided for emitting a stream of low pressure air into the path of movement of selected elements of the apparatus and generating a pneumatic signal each time a stream of low pressure air is interrupted by the movement of such elements, and a low pressure pneumatic control system receives the pneumatic signals and operates the selected elements of the apparatus in a predetermined sequence.

Abstract: Process and apparatus for yarn piecing in an open end spinning assembly are provided. The individual steps of the yarn piecing process are controlled by a predetermined piecing program whose start is triggered as a function of the running up of a previously braked down spinning rotor, so that a yarn carried back into the spinning rotor will be applied in the spinning rotor to a fiber ring at a time during which the spinning rotor has only reached a revolutionary speed that is below the operating revolutionary speed thereof. In order to avoid imprecisions in the piecing process caused by delays and/or differences in the running up characteristics of the individual spinning rotor, one or more predetermined spinning rotor revolutionary speeds are established, and upon reaching the same, the yarn piecing process is initiated and controlled.

Abstract: A novelty yarn having a pronounced variation in linear density is obtained by passing at least one multifilament yarn through a fluid tangling zone and by alternatingly and mechanically tensioning and relaxing the yarn within the tangling zone. The yarn comprises a wax coating.

Abstract: A zero twist, staple fiber yarn of good strength, outstanding cleanness and good uniformity is produced from continuous filaments by a direct spinning process followed by entangling to a pin count of less than 50 millimeters. Filaments of less than 70 percent break elongation are stretch broken to fibers having an average length of 18 to 60 centimeters with at least 5 percent short fibers, at least 1.5 percent long fibers, and 50 to 93.5 percent fibers of lengths between 12.7 and 76 centimeters.

Abstract: The production of plied yarn in pot spinning in which a pot is filled with yarn emerging in one direction from a reciprocating traversing tube. When the pot is filled to the desired extent a lead yarn is injected into the pot by pneumatic means in a direction opposite to the said one direction so that yarn from the traversing tube is wound around the lead yarn. The lead yarn is then withdrawn from the pot in said one direction and the yarn in the pot is wound around further yarn from the traversing tube.

Abstract: A traveller for ring spinning and twisting is provided comprising a high modulus/low friction resin blended with a fibrous whisker material. A lubricant is usually added to the composition. The resulting traveller is characterized by a wear-life hitherto unavailable that is, a wear-life six to eight times greater than that of conventional travellers.

Abstract: An improved thread monitoring arrangement for open-end spinning machines is provided. A traverse rod extending along a plurality of open-end spinning stations carries individual thread monitors, moveable therewith, for monitoring thread breakage at each of the respective stations. The thread monitors and traverse rod are disposed intermediate the spinning stations and take-off rolls, and are disposed and configured for accommodating thread-piecing operations without requiring movement of the thread monitors.

Abstract: An open-end spinning aggregate with a housing connected to a vacuum source, in which is arranged a spinning rotor provided with an open end-face, into which projects an insert leaving an annular gap and containing a central filament removal channel as well as a fiber feed channel whose orifice is disposed opposite a fiber-collecting surface of the spinning rotor which extends from the open end-face up to a fiber-collecting groove occupying the area of the largest diameter of the spinning rotor; ventilating bores are provided in the wall surface opposite the fiber-collecting surface with respect to the fiber-collecting groove whose axes extend at least approximately parallel to the axis of rotation of the spinning rotor.

Abstract: Under influence of positive and negative aerodynamic action imposed on a conic surface, airborne fibers and tufts are compelled to disperse approximately 360.degree. and to enter the rotor of an open-end yarn spinner device, peripherally, thereby minimizing identifiable yarn imperfections and inefficiencies attributive to open-end yarn formation.

Abstract: In an open-end spinning process wherein staple fibers are continuously fed to an air vortex and wherein a yarn tail extends into the vortex whereby the fibers affix themselves to and lengthen the tail, the yarn tail is driven at a faster revolution rate than the tail would be driven by the vortex alone by means of a rotary driven member.

Abstract: An apparatus for manufacturing filaments of varying denier includes electrically activated tension means disposed between a feed roller and a draw roller for engaging the filament and producing a variable tension thereon when activated.

Abstract: Self-twist plural yarn strands are produced by a system wherein at least two singles yarn strands are individually twisted to form twisted strands each having longitudinally spaced nodes, and strands are brought together in a parallel relationship with the nodes of one strand substantially aligned with the nodes of each other strand. The corresponding nodes from one strand are fastened to those of each other strand, and the strands are allowed to ply. The node fastening means comprises a rotating member having a contact surface for fastening the nodes by gathering and twisting of the fibers from one strand with those of another strand at the nodes of each respective strand. Ply yarn twist uniformity is assured through the use of improved twist insertion jets, together with a means for holding singles yarns separate to allow longitudinal levelling of singles yarn torque prior to plying.

Abstract: The invention relates to an open-end spinning device comprising an opening-up member (2) whereby the fibers, which are supplied in the form of a continuous sliver, are disintegrated and then introduced into a spinning turbine rotating at high speed, the yarn extracted from the turbine being discharged through an outlet tube; a funnel-shaped member is secured to the disintegrator (2) and thus rotates at the same speed.The funnel comprises a hollow element having a top securing flange which extends into the spinning chamber and which, along its central axis, has a tubular head terminating near the outlet tube.

Abstract: The instrument comprises means for measuring the ambient air temperature and providing a first signal proportional to the temperature, means for providing a second signal proportional to the non-evaporative rate of body heat loss in K Cal./m.sup.2 hr, and means for providing a third signal representative of the thermal insulation resistance of still air outside of clothing. Means is also included for measuring the fraction of full sunlight intensity reaching a person wearing the clothing, and for providing a fourth signal representative thereof, and further means for providing a fifth signal representative of the absorptance of the clothing. Further means adds the first signal to the product of the second and third signals and to the product of 230 and the third, fourth and fifth signals and substracts the product of 0.18 and the second signal, and provides an output signal, which is representative of the still shade temperature.

Abstract: A slubbing is formed into a thin band by a plurality of pairs of rollers. A core filament is thereafter applied to each face of this band and the two core filaments and band are then spun together to form a core yarn comprising a coherent mass of fibers in which is imbedded a pair of parallel and spaced apart core filaments with some of the fibers of the mass between the spaced-apart filaments.

Abstract: A process for making a dispersion-based asbestos strand for later twisting to form a yarn comprises (a) forming an elongate continuous stream from an aqueous coagulable dispersion comprised of asbestos fibres, water and dispersion-forming chemicals; (b) coagulating said dispersion in said stream to form a self-sustaining asbestos fibre strand containing coagulated dispersion-forming chemicals together with uncoagulated residues thereof and water; (c) while said strand is in an untwisted state removing substantially the whole of the coagulated dispersion-forming chemicals and said uncoagulated residues thereof; and (d) adjusting the water content of the strand to provide an untwisted strand formed substantially wholly of said asbestos fibres and containing not more than 20% by weight of water.

Abstract: Stopping means for an open-end spinning turbine comprises a lever pivotable beneath the shaft of the turbine and the drive belt for the shaft. The lever moves toward the belt and the shaft to sequentially lift the belt off the shaft and lift the shaft from its support rollers.