Abstract: Method of spinning staple fibers by imparting false twist to a continuous fiber bundle. The continuous fiber bundle is formed by a successive doubling of separated fibers, and is thereupon twisted by means of a false twisting element, the separated fibers being distributed along the twisted length of the fiber bundle, as well as along the untwisted section of the continuous fiber bundle.

Abstract: Apparatus for cleaning the rotor of the spinning unit for the open-end spinning of yarn. The apparatus has a cleaning head with cleaning elements arranged in the form of a rotary brush mounted upon a rotatably driven shaft. In the cleaning head, at the rear side of the brush, there is provided at least one projection which deflects or bends the bristle of the brush axially outwardly at intermediate portions thereof so as to reduce their effective diameter so as to enable them to penetrate into the inlet opening of the spinning rotor.

Abstract: Method of and apparatus for splicing fibrous formations, particularly yarns. Mutually closely arranged parallel and overlapping ends of the fibrous formations to be spliced are disposed inside the pressure channel of a splicing chamber. The thus disposed fibrous formations are subjected to the whirling action of pressure air and at least at one of the mouth of said pressure channel they are subjected to the action of an air flow from the pressure channel, such air flow vibrating at a high frequency. Such vibration of the air flow is achieved by directing the air flow column from the pressure channel toward an obstacle confronting and near the mouth of the pressure channel. Such obstacle may be made adjustable, whereby to adjust the frequency of vibration of the air flow column.

Abstract: Method of and apparatus for preparing and splicing the ends of fibrous formations, particularly in the pressure channel of a pneumatic splicing chamber provided with a displaceable lid. Excess lengths of ends of fibrous formations to be spliced are placed within the pressure channel in overlapping substantially parallel relationship and are then cut to a desired length by cutting means such as scissors. Following such cutting operation, the fibrous formations within the pressure channel are bent without gripping over the edges of the mouth of the pressure channel, whereby to hold the sections of the fibrous formations within the channel in generally parallel relationship.

Abstract: An arrangement for the selective insertion of two weft yarns into two sheds of a jet loom with weft change. Each weft yarn is assigned a fixed jet provided with outlets into both sheds, and connected to two pressure air supplies, opened alternatingly according to a predetermined program. A plurality of such arrangements can be employed in combination with the said two sheds, the arrangements can be programmed to interact in a number of predetermined manners to produce a variety of fabric patterns.

Abstract: A fiber-guiding element for open end spinning machines through which separated fibers are directed into the spinning rotor. The rotor may be rotated in either direction for the purpose of forming either yarn with a left-hand twist or yarn with a right-hand twist. In accordance with the invention, the rear directing wall of said fiber-guiding element, which is symmetrical relative to the longitudinal axis of the element, is directed substantially tangential to the retreating collecting surface of the spinning rotor when the rotor is rotated in a first direction, while the opposite, front directed wall of the fiber-guiding element at the side of the exit opening therein is directed toward the other side substantially tangential relative to the retreating collecting surface of the spinning rotor when the rotor is rotated in the second, reverse direction.

Abstract: Apparatus for the programmed change of position of one or more members, particularly of the nozzles of jet looms. The disadvantages of similar prior devices are mitigated by the arrangement of the device according to the invention in which a driving cam is provided with an auxiliary cam path for the cam following pin of a combined cam follower element, said pin being mounted axially displaceably on the carrier of the combined cam follower element and being urged toward the cam by a spring. One of the ends of said pin is controlled by the auxiliary cam path, while in the vicinity of the other end there is mounted a controlled arresting mechanism. The driving cam can be made in the form of a box or a globoidal cam. In the embodiment employing a globoidal cam, the pin of the combined cam follower element has its opposite ends of similar construction, while the combined cam follower element includes further auxiliary guiding pins which are arranged crosswise with respect to the pin of the cam follower.

Abstract: The present invention relates to a nozzle for texturing a thread by a gaseous fluid flow. The nozzle is provided with an angular channel for guiding a thread, a channel for feeding gaseous fluid thereto, opening obliquely into the angular channel, and at the exit of the angular channel is located a texturing bridge. A second channel for guiding a second thread is provided, which opens obliquely into the angular channel for guiding the first thread.

Abstract: Method of and apparatus for break spinning yarn in a spinning machine. A fiber ribbon is formed into a fiber ribbon, the ribbon is false twisted in a first twisting element, staple fiber ends are lifted from the false twisted ribbon in a second, re-spinning twist imparting element, the second element being driven in the same direction as but at a higher speen than the first element, the thus resulting spun yarn is given an additional, true twist, and is then wound on a bobbin.

Abstract: Mechanism for launching grippers in gripper looms, in which the launching power source is stationary and the gripper is provided with a guideway and means for controlling and defining the gripper path, such means being connected to the beat-up mechanism of the loom. The mechanism has a launching arm and an impact element which is connected thereto by means of a connecting rod and pivotal joints on the launching arm, as well as on the impact element, each of which provides for two degrees of freedom of motion between each pair of parts which it connects.

Abstract: There is disclosed a machine for selectively sewing four different kinds of buttonholes, i.e. (1) with an eye, (2) without an eye, (3) with a wedge bar tack, and (4) without a wedge bar tack. The machine accomplishes all of these different types of sewing with the use of only two shaped cams permanently arranged in the machine, the first of such cams being for sewing the eye, and the second of such cams being for sewing the bar tack. The machine has a support plate for the workpiece, such support plate being coupled with one end of a first two-armed lever the second end of which is formed as a pivot of a second two-armed lever whose first end is disengageably connected with the first cam. The second end of the second two-armed lever is disengageably connected with the second cam by way of further members comprising a rod which is rendered immobile in the disengaged position with respect to the overarm of the sewing machine.

Abstract: There is disclosed a buttonhole bar tacker sewing machine with a device for controlling the length of the buttonhole terminated by a wedge bar tack, the machine having a support plate for the workpiece and control members for exerting a reverse motion in the direction of the longitudinal axis of the buttonhole. The control device comprises a first cam, a cam for forming a wedge bar tack and at least one further cam coupled in its motion with the first cam for bar tacking the eye of the buttonhole. The further cam for bar tacking the wedge bar tack of the buttonhole is arranged reversibly rotatable about its axis of rotation and adjustable in its angular position and adjustable relative to the first cam and is further reversibly coupled in its motion with the reversible motion of the support plate in the direction of the longitudinal axis of the buttonhole.

Abstract: There is disclosed mechanism for controlling the workpiece pressure grippers of buttonhole bar tacker sewing machines, such machines having means for selectively cutting the buttonhole either before or after the sewing operation. The controlling mechanism comprises a first disengaging member for controlling the pressure grippers, and a second disengaging member for selectively starting and stopping the machine. The two disengaging members are disposed in the path of rotary motion of at least one part coupled in the motion both with the device for driving the workpiece support plate of the machine and with the cam which controls the cutting knife of the machine.

Abstract: Variable displacement cam driven piston pump having means for the stepless adjustment of the length of the pump stroke. The stroke adjusting means has pivotally mounted spaced parallel levers, the levers being interposed between the cam and the piston of the pump, the levers being mutually coupled in their movement by a means adjustably arranged along the length of said levers, said levers being disposed on the opposite sides of a plane defined by the contact points between the lever coupling means and the levers.

Abstract: A resinous adhesive composition which is resistant to the deleterious effect of moisture and water includes an additive selected from among inorganic nitrites, alkalinized salts of hexavalent chromium, inorganic phosphates, silicates, carbonates and mixtures thereof. The additive is present in an amount ranging from 0.1 to 10 percent, by weight, based on the weight of the adhesive.

Abstract: Facilities for temporarily holding a rear portion of a fluid-actuated piston rod coupled to a gripper shuttle in a weaving loom are described. Pressurized fluid is cyclically introduced into a chamber that communicates at its rear end with an elastomeric reservoir and at its front end with the rear portion of a cylinder in which the piston rod moves, with a rear collar on the piston rod projecting into the chamber when the piston is in its rearmost launch position. A pivotally mounted fork is mounted in the chamber for normally engaging and immobilizing the collar on the piston rod. Prior to the initiation of launch, the fork is moved via a lever and pitman assembly from such locking position to a forward release position in which the piston rod may be propelled forwardly by pressurized fluid accumulated in the elastomeric reservoir.

Abstract: A method and apparatus providing for the selection of certain selector jacks in circular knitting machines, in response to and according to a given recorded program as on a patterning drum or electromagnetic patterning system. These chosen selectors are caused to be racked into engagement with the cam system to be raised, subsequently actuating the appurtenant needles associated with them to form loops in one yarn feed system. Before complete retraction of these needles, those selectors which are not chosen and which do not lift are then racked into engagement with the cam system and caused to raise actuating their needles in the subsequent yarn feed system.

Abstract: An improved nozzle arrangement having facilities for reducing turbulence in the flow of hydraulic pressure pulses during the introduction of a weft-propelling fluid to a pressure chamber of such arrangement is described. An annular insert is disposed coaxially within the outer nozzle housing exhibiting a liquid-introducing radial opening, the insert having a peripheral recess in alignment with the radial opening in the housing. A plurality of axial bores are disposed symmetrically around the circumference of the insert, and extend forwardly from the front wall of the peripheral groove to communicate with the pressure chamber defined between the front wall of the insert and the front flange of a nozzle member, such nozzle member having a central tubular element extending rearwardly from the flange and into the hollow interior of the insert.

Abstract: A pair of parallel rollers disposed in a path of advance of leno waste exiting from a leno weave portion of a weaving machine are provided with facilities for maintaining their peripheries free of the leno waste as such waste advances through the roller nip. Each of the rollers is made hollow, and is provided with a plurality of peripheral apertures for continually ejecting pressurized air axially introduced into the hollow interior of the cylinder by a fitting in its end wall. Each of the so-apertured cylinders is disposed within a contoured housing which necks down in the leno waste-advancing direction from a relatively wide, convex central portion to relatively narrow inlet and outlet end portions through which the waste enters and exits from the roller nip. As a result, pressurized air emerging from the peripheral apertures of the rollers is directed radially outward through each of the narrow end ports of the housing to entrain the leno waste and to continuously clean the periphery of the cylinders.

Abstract: A portable device for collecting and automatically sorting wound spools from open-end spinning machines is described. The device includes an entry chute that cooperates with the outlet end of a conveyor on the top of the spinning machine for guiding each spool into a wedge-shaped classifying guide, which directs each spool into an auxiliary storage magazine or onto a conveyor in accordance with the overall diameter of the spools. The spools directed to the conveyor are guided in the device onto a second conveyor, which moves in a horizontal path above a movable platform, from which extend a plurality of spool-receiving receptacles. Facilities are associated with the second conveyor for successively receiving classified spools from the first conveyor and for releasing the spools seriatim onto the underlying receptacles.