Abstract: Rotating winch for stranding lines comprising a hollow rotor (1) wherein a motor (9) suitable for rotating a drawing drum (12) around an axis perpendicular to the axis of rotation of the rotor (1) is arranged, the external lateral surface (21) of said drawing drum (12) having a substantially concave profile which is included between two containment walls (22, 22′). Said profile is preferably symmetrical and has a substantially constant radius of curvature, equal to about the double of the distance between the containment walls (22, 22′) and to about ⅔ of the external diameter at the center of the drawing drum.

Abstract: In the case of an opening device for an open-end spinning machine, the rotating opening roller is arranged in a housing with a prevailing vacuum and has one front side which is exposed to the free atmosphere. In the area of this front side the opening roller is sealed off against the housing by means of a labyrinth seal. The labyrinth seal starts in the area of a peripheral combing structure of the opening roller with a first sealing gap and ends with a second sealing gap in the free atmosphere. The sealing gaps are formed by cylindrical collar surfaces of the opening roller and corresponding hollow cylindrical countersurfaces of the housing. In addition, the collar surfaces are provided with fly repulsing notches, whose direction of effect is such that the fly is repulsed at the first sealing gap towards the combing structure and at the second sealing gap, repulsed towards the free atmosphere. The front side of the open roller exposed to the free atmosphere is not covered by a lid.

Abstract: Apparatus and process for the production of stranded wire from copper wire, whereby the stranded wire is wound upon a spool by means of a transfer mechanism. A control arrangement is provided, which regulates the rotation of the spool, the motion of a transfer element which is a component of a transfer mechanism and a separate drive for the transfer mechanism.

Abstract: The present invention provides a unique method and system for automatically controlling the motion of a rotary ring twisting and winding device, provided with a rotary ring member rotatably mounted on a holder by way of a bearing mechanism, which is utilized for textile machines having a so-called ring traveller twisting and winding mechanism. The present invention is characterized in that the rotational speeds of the rotary ring member and spindles are continuously detected, and the detected rotational speed of the rotary ring member is compared with the desired rotational speed of the rotary ring member which is calculated by multiplying a predetermined ratio by the detected rotational speed of the spindles, and if it is detected that the rotational speed of the rotary ring member is out of control, the rotational speed of the rotary ring member is electrically controlled to return to a condition of satisfying a predetermined allowable controlled condition.

Abstract: A spinning machine has a third guide eye rail, a third balloon-confining ring rail and a traveller ring rail each of which may be operated by a flexible member from a windless drum and the latter can have an electric motor drive. According to the invention, instead of storing all of the points defining the time course of the movement of the rail, a selected number of points such as starting points for the mean path and amplitude, one or more envelopes, and the amplitude or double amplitude of the oscillation superimposed upon the mean path are determined and a corresponding time course is generated. From the time course at given times determined by the oscillation, the maxima and minima of the path is produced by the evaluation and control unit and used to reverse the motor which raises and lowers the respective rail.

Abstract: A method and apparatus for producing randomly variegated multiple strand yarn in twisting together two or more yarns at a plurality of yarn twisting stations. At each station a pneumatic twisting head is disposed in which randomly turbulent air currents are created in a chamber in the twisting head by compressed air flowing into the chamber from a manifold through bores in the twisting head, thereby randomly twisting together two or more yarns in the chamber. The yarns which have been twisted together are taken up over a plurality of traversing drums commonly mounted on a shaft which is driven by an alternating electric current motor controlled by a control device which operates to start and restart the motor on a predetermined cycle including a variation of the electrical input sufficient to result in randomly unpredictable inertia resistance of the traversing drums to rotational speed variation, thereby creating randomly unpredictable take-up of the yarns to produce non-uniform random twist in the yarns.

Abstract: When a full bobbin signal from a counter CCM counting the number of rotations of the front roller (3) is output, the control element (28) outputs a signal directed to the control motor (M2) of a unit (29) for reciprocating a bobbin rail (10). As a result, the rotation of the control motor (M2) is combined with the rotation of a differential gear (14 ) connected to the main motor (M1), so that a reciprocating movement of the bobbin rail (10) after the full bobbin state is obtained which is faster than that obtained during a usual taking up operation of the roving, which causes the roving to be wound on the bobbin in a much coarser state than usual. A limit switch (LSP) detects a predetermined desired position of the bobbin rail (10), and the control element (28) outputs a signal directed to the unit (29), whereby the main motor (M1) and the control motor (M2) are stopped.

Abstract: A method is described of operating a ring spinning machine in which the traversing motion of the ring rail is generated by means of a heart-shaped disc. For the execution of specific functions which depend on the angular position of the heart-shaped disc, the period of rotation of the heart-shaped disc is first determined. Thereafter, a predetermined angular starting position of this heart-shaped disc is detected and, on the basis of the predetermined period of rotation, the time is then computed in each case from the occurrence of the angular starting position up to the occurrence of at least one further predetermined angular position which is associated with a respective function. On the expiration of the time associated with a respective angular position, the related function is executed.

Abstract: The invention provides a means of controlling the speed of operation of a material processing apparatus, such as a ring spinning machine in a textile mill. The purpose of the invention is to allow high speed processing, while maintaining a high quality product. In the case of ring spinning for instance, the object is to reduce the incidence of yarn breakages.The method in accordance with the invention includes controlling the speed of operation during a total time for processing a finite quantity of the material, and including the use of an automatic control apparatus preset to change the speed of the driving motor in a series of very small increments throughout a speed change time which is a predetermined percentage of the total time, between two speeds, one of which is a predetermined optimum operating speed and the other of which is a predetermined percentage of the operating speed.

Abstract: A spinning frame 10 is disclosed for processing a strand at a varying strand movement speed to produce a strand processed with uniform tension. The spinning frame includes a motor 21 and a planetary gear box 30 which operates as a differential having first and second speed input elements formed by the rotation of the gear box housing 31 and a variable speed shaft 36. Housing 31 rotates at a constant speed and shaft 36 at a variable speed determined by the speed of rotation of a motor 50 which is controlled by an input to a variable capacity pump 45. A computer 70 operates through a servo-valve 60 to vary the speed of cylinder 18 to produce a speed required to maintain uniform tension on the strand.

Abstract: A method and an apparatus for automatically controlling the winding tension of the roving in a bobbin lead roving machine is disclosed. The mean bobbin winding diameter D.sub.B, bobbin r.p.m. N.sub.B and the flyer r.p.m. N.sub.F are measured automatically for one or more operating spindles, and a mathematical equation (N.sub.B /N.sub.F -1).times.D.sub.B =K representative of winding conditions for the roving is solved by automatic operation based upon the above measured values. When the value K thus obtained exceeds a preset control limit, the bobbin r.p.m. is decreased or increased automatically for correcting the value K towards its central setting for automatically correcting the winding tension of the roving.

Abstract: Described is a bobbin lead roving machine in which target r.p.m. values for the bobbin are found in advance for each of arbitrarily selected numbers of the layers of the roving taken up on the bobbin and are stored in a micro-compouter, there r.p.m. values are compared to actual r.p.m. values for respective ones of said arbitrarily numbers of the layers, and compensation is made automatically for any offsets resulting from such comparison for causing the r.p.m. of the bobbin to be within a control limit, in a manner that the take-up tension placed on the roving is kept constant during spinning since the beginning until the end of winding on the bobbin for producing the roving of uniform weight (with a constant weight/unit length).

Abstract: A single-twist stranding machine includes a stranding disc and nipple for stranding together a plurality of filaments, wires, conductors or the like, a rotatably mounted take-up spool onto which the stranded-together elements are wound, a flyer coaxial with the spool and including a frame and deflection pulleys to run the stranded-together elements from the stranding means to the spool, the flyer revolving about the spool, and a common drive motor. The specific improvement disclosed includes a differential gear transmission having two input gears and an output gear; a first transmission for drivingly connecting the drive motor to the flyer, one of the input gears of the differential gear transmission is a part of the first transmission; a second transmission drivingly connects the output gear to the spool for causing the spool to rotate; and a control drive operates the other input gear to vary the speed relation of flyer and spool in dependance upon the input speed of the stranding elements.

Abstract: A yarn-body core is supported by an upright spindle adjacent a vertically displaceable yarn guide through which a yarn to be wound passes to the core. The core and spindle are rotated and simultaneously the guide is displaced upwardly along the core to wind the yarn on the core until an instant when a yarn package having a predetermined size is formed on the core. Thereafter the guide is lowered to a level below the core while the spindle continues to rotate to wind several turns of the yarn on the spindle below the core. The rotation rate of the spindle and the core is decreased to a relatively low level prior to the instant when the yarn package is completely formed and thereafter this rotation rate is decreased to a standstill in accordance with a predetermined program starting at the instant the yarn package is fully formed and ending when several turns have been wounded on the spindle.

Abstract: The method for winding yarn in the form of a cone onto a bobbin carried by a spindle in a spinning or twisting frame consists in passing the yarn to be wound through a traveler mounted on a revolving ring, in lifting and lowering the ring cyclically around the bobbin in order to form the winding cone, and in producing a cyclic variation in the spindle speed in accordance with the cycle of up-and-down motion of the ring support plate.