Abstract: A mechanism for pneumatically purging undesirable fiber fluff and dust from a spindle assembly of a two-for-one twister textile thread processing machine created during thread processing and particularly in the area of a rotating thread balloon and being characterized by utilizing air flow created by operation of the spindle assembly in processing thread without disturbing the rotating thread balloon is provided. The purging mechanism includes a housing jacket axially mounted on one end of a balloon limitor device and having a generally curved inner wall spaced from the axis of the spindle assembly rotor mechanism and the carrier mechanism a greater distance than the inner wall of the balloon limitor and a lateral opening on one side thereof, and a duct connected to the lateral opening and adapted to lead to a collecting container.

Abstract: An apparatus for untwisting a multi-ply yarn over a predetermined portion of the length thereof has an untwisting element provided with two contact surfaces which face one another and between which the multi-ply yarn is guided and whose mutual spacing is greater than the thickness of each of the individual strands forming the multi-ply yarn and smaller or equal to the thickness of the multi-ply yarn, at least along a line transversely of the longitudinal direction of the multi-ply yarn. The contact surfaces are displaced relative to one another in mutually opposing directions transversely of the longitudinal direction of the multi-ply yarn. Torque is then relay transmitted to the multi-ply yarn and leads to the untwisting of the multi-ply yarn.

Abstract: A two-for-one twisting spindle which, in order to prevent the thread from being further drawn off through the hollow spindle shaft in the event of thread breakage, is provided in the range of the hollow spindle shaft, with a compressed air operated device to influence the thread passage. The compressed air operated device includes an element adapted to be moved into the path of travel of the thread, and a counter element opposing the movable element and cooperating therewith whereby the movable element which is adapted to be moved into the path of travel of thread is a stud to be coaxially inserted into the hollow spindle shaft from below.

Abstract: A yarn wetting device, particularly for a two-for-one twisting spindle assembly, has a reservoir and a porous member which has capillary action and over which yarn is drawn for the purpose of receiving wetting agent or the like which is fed from below by suction from the reservoir to the porous body. In order to ensure uniform transfer of the wetting agent, irrespective of the level of the wetting agent in the reservoir, a line system leads into the reservoir and has an opening which opens into the atmosphere above the reservoir and an opening located at a distance above the bottom of the reservoir, and the reservoir is sealed relative to the atmospheric pressure when the level of the wetting agent in the reservoir is above the bottom opening of the line system.

Abstract: A two-for-one yarn twisting spindle assembly having no balloon limitor utilizes a ring member for receiving a generally horizontal air flow and yarn emerging from the spindle assembly during pneumatic threading and deflects the air flow and yarn generally vertically upwardly therefrom along the outside of the spindle assembly, avoiding interference with adjacent spindle assemblies without the necessity of a conventional balloon limitor, for subsequent threading operations.

Abstract: A thread brake for a two-for-one twisting spindle or twisting station having a tubular brake housing with a thread inlet opening arranged in the axis thereof and having a brake surface ring received in the brake housing and arranged at an axial distance from the thread inlet opening with an annular opening of the brake surface ring being arranged coaxially to the axis of the brake housing, and a circular brake element cooperating with the brake surface ring. The thread passes concentrically through the thread brake utilizing a by-pass passage which is arranged within the brake housing which passage extends laterally of the annular opening of the brake surface ring, and the by-pass passage is followed, in radial section, by a spirally curved slot leading to the annular opening of the brake surface ring.

Abstract: A pull-off aid of variable geometrical configuration for the overhead drawing-off of a thread (a,a') to be would onto a bobbin (1) from a feed or creel bobbin (11) mounted on a bobbin carrier, has an outer diameter which is variable by a control pulse which is dependent upon the increasing diameter of the bobbin (1) being wound and thereby upon the decreasing diameter of the feed or creel bobbin from which the thread is being drawn. To this end, a diameter sensor (2), by which the control pulse is initiated, responds when the bobbin being wound has reached a predetermined diameter.

Abstract: In a splice between ends of multi-ply yarn, each ply end (G1a, G1b) of an end of the multi-ply yarn (Z1) is disposed adjacent to an associated ply end (G2b, G2a) of the end of the other multi-ply yarn (Z2) so as to overlap it over a predetermined length (U1, U2), and each of these two ply ends (G1a, G2b, or G2a, G1b) has the respective other ply end (G1b or G2b) of the multi-ply yarn wrapped around it in the region of overlap (U1, U2), different regions of overlap (U1, U2) of a splice being disposed in the longitudinal direction of the multi-ply yarn without overlaps.

Abstract: A stop motion for textile machines for transmitting a signal for stopping a working station in case of a thread breakage or a used-up supply bobbin. The stop motion includes a thread guide eyelet secured to a thread sensor bar which is pivotable about a horizontal pivot shaft, and is characterized by a guide element located between the pivot shaft and the thread guide eyelet. The guide element supports the thread sensor bar in its normal operating position against lateral vibrational movements exerted by the running thread.

Abstract: A thread guide for drawing threads (3',4') overhead from two yarn bobbins (3,4) disposed coaxially one above the other comprising separate thread guide flyer arrangements (5,12) mounted by means of respective bearing bushes (6,13) provided for each yarn bobbin. The thread guide flyer arrangement (5) provided for the lower yarn bobbin (3) is mounted between the two yarn bobbins. The second thread guide flyer arrangement (12), which can be associated with the upper yarn bobbin, is also mounted between the two yarn bobbins such that the two thread guide flyer arrangements keep one another under control for the purpose of rendering their circumferential speeds uniform.

Abstract: In a pneumatically threadable yarn brake, in which a substantially capsular brake cartridge (7) abuts against an upper (8) and lower (9) brake surface ring in a brake housing, the lower brake surface ring (9) is connected to an annular diaphragm (16) which is downwardly adjustable or movable under the action of a vacuum, at the same time carrying along the lower brake surface ring (9).

Abstract: A two-for-one twisting spindle has a compressed-air-actuating device which is disposed in the region of the hollow axle (21) of the spindle (1) above the spindle rotor, and which influences the run of the yarn and to which a compressed-air passage (29), extending through a stationary part (7) of the spindle, leads, in order to prevent the yarn from being drawn through the hollow axle of the spindle in the event of breakage of the yarn. The compressed-air-actuated device is a compressed-air-cylinder (27) whose axis intersects the hollow axle of the spindle at right angles thereto and whose outer wall has two openings (25) which are located diametrically opposite one another and which are in alignment with the hollow axle of the spindle, and a piston (26) which is displaceable within the compressed-air cylinder and whose rear end is subjectable to compressed air for the purpose of clamping (FIG. 1), or cutting (FIG. 5) through the yarn.

Abstract: A yarn brake and process for applying substantially uniform tension to at least two yarns moving from separate, cross-wound, supply packages of yarn in a textile yarn processing machine, particularly a two-for-one twister, is provided. The yarn brake mechanism includes a member defining an outer, frusto-conical shaped, yarn braking surface tapered in the linear direction of movement of the yarns, and a comb-like, braking, ring member slidably positioned around the braking surface for receiving the moving yarns in braking engagement between the braking surface and the ring member. The ring member has slightly spaced-apart teeth of pliantly elastic, springy material positioned therearound and extending therefrom generally in the linear direction of movement of the yarns.

Abstract: A carrier device for at least two twister or bobbin tubes (4, 17) disposed axially one above the other, comprising a substantially sleeve-shaped carrier member whose bottom end has a radially outwardly directed support surface (3) for supporting the lower tube (4). Disposed in the central region of the carrier member is a support surface (12) whose circumference is smaller than the inner circumference of the lower tube (4) to enable the latter tube (4) to be slipped onto the carrier body over the support surface 12. An annular or disc-shaped pull-off aid (13), which is preferably mounted so as to be freely rotatable, is slipped onto the support surface (12) and ensures that the threads from the tubes are not damaged when they are drawn off overhead, and that excessive stressing of the threads is avoided.

Abstract: There is described and shown apparatus which is for the controlled feeding and taking-off of a thread 12 into or out of a thread treatment section 2 (for example a heating zone of a heat setting arrangement), and which comprises an externally-driven tapered drive roll 4 upon which bear two tapered counter-pressure rolls 5, 6, whereby the thread 12 can be fed into, and taken-off from, the treatment section 2, using only a single drive means for this feeding and taking-off. The arrangement shown is provided with two thread guide members 9, 10 of fork form, which are swivellable to vary thread tension, one of said guides being swivellable to move the thread engaged between roll 4 and roll 5 along one side of roll 4, and the other of said guides being swivellable to move thread engaged between roll 4 and roll 6 along the other side of roll 4.

Abstract: In a thread brake having two coaxial braking surface rings 2, 3 arranged in spaced relationship to one another and a capsule-shaped braking cartridge 7 whose hemispherical ends bear against the braking surface rings, to make it easier to thread a thread through the brake and the two braking surface rings are each provided with an axial threading slot 2', 3' so that a thread which is inserted sideways into the threading slots in the two braking surface rings can be automatically introduced between the braking surfaces in a simple and reliable manner by tightening or tensioning the thread.

Abstract: An improved yarn reserve disc having an annular rim of a radial length of at least 7 mm extending radially outwardly from a lower portion of an outer, circumferential, yarn storage surface thereon in a spindle assembly of a two-for-one twister textile yarn processing machine. The annular rim prevents coils of yarn wrapped around such yarn reserve disc, upon breakage of the yarn during processing by the spindle assembly, from slipping down off of the yarn storage disc to interfere with subsequent driving of the spindle assembly.

Abstract: A yarn brake for applying tension to a yarn at the entrance end of a tube as the yarn moves through the tube and which may be utilized in a hollow spindle assembly of a textile yarn processing machine, such as a two-for-one twister. The yarn brake includes a first braking surface formed on a yarn entrance end of the tube and a movable brake member resting on the yarn entrance end of the tube and having a second braking surface on the underside thereof for cooperating with the first braking surface to apply tension to the yarn moving therebetween. The yarn brake includes a threading slot formed in the entrance end of the tube for threading of the yarn through the tube without moving the braking member from the entrance end of the tube.

Abstract: There is described a stator section, for a spindle which has a spindle rotor at least partly enclosing the stator section, wherein the stator section incorporates, in the region occupied by surfaces situated opposite the spindle rotor, a dust and thread catching means. To provide this means, parts of surfaces of the stator lying opposite the rotor may be roughened. For this purpose the stator may be provided with grooves having mechanically-roughened surfaces or may have wound around it a strip of Velcro or strip of some other material, whereby the foreign bodies which are carried by the air, which flows through the rotor on the counter-current principle, collect on the said roughened parts of the surface of the stator or on said strip, as a result of which the foreign bodies are prevented from reaching the region occupied by a spindle bearing arrangement.

Abstract: There is described a two-for-one twisting spindle having a supply receptacle for a lubricant arranged in a base of a protective pot, a region of an outer circumferential surface, of the protective pot, over which the revolving thread passes when the spindle is operating, communicating with the supply receptacle in such a way that lubricant is brought to the said region of the circumferential surface. Thereby the supply receptacle is in a stationary part of the spindle, so that lubricant content in the receptacle has no inertial effect on the running of the spindle. The arrangement enables consistent but not excessive wetting to be provided for the thread without the thread being subjected to undesirable stresses while the spindle is operating. In the arrangement shown, a protective pot 4 has a sidewall 5, over which thread 16 passes when the spindle is operating, and a base 7 having a cavity holding a supply of lubricant 10.