Abstract: In the yarn tension regulating device for knitting machines in which the yarn (25) runs through a yarn tension sensor (24) and a yarn brake (20) automatically adjustable in dependence upon the indication of the yarn tension sensor, there is located directly in front of the automatically adjustable yarn brake (20), in the direction of travel of the yarn, a yarn forwarding device, in particular a yarn storage feeder (13), by which the tension imparted to the yarn on its path from the yarn spool to the yarn brake is relieved. Between the yarn brake (20) and the yarn tension sensor (24), which follows it in the direction of movement of the yarn, is located a known yarn take-up (21), whereby the automatically adjustable brake (20) constitutes the yarn brake usually provided for this yarn take-up.

Abstract: A yarn feeding apparatus for yarn-processing textile machines such as circular knitting machines has a feed element which advances the yarn with its circumference. The feed element is rotatably supported on a holder which is arranged to be secured on a carrier and has yarn guide and/or monitoring devices for the yarn being fed to and/or delivered by the feed element. The feed element is driven by a regulated electric motor disposed on the holder. To provide for yarn feeding apparatus which is both compact and inexpensive, the electric motor is a stepping motor coupled to at least one yarn feed element, which advances a yarn in a slip-free manner with its circumference, each element having its own yarn guide and monitoring devices associated with it.

Abstract: A flat-bed knitting machine has yarn restraining devices (10) disposed adjacent opposite ends of the stroke of its cam box (4) for controlling the supply of yarn (Y) to the needles so that no loops are formed at the edges of the knitted fabric produced on the machine and no tension is applied to the yarn by the devices while the rows of stitches are being knit. Each device (10) comprises a spring arm (12) for engaging with a cooperating flat surface (17) on the top of the cam box (4) during movement thereof over a predetermined end portion of the stroke and for trapping the yarn (Y) between the arm (12) and the surface (17). The arm (12) is adapted to retain the yarn so trapped as the cam box (4) commences a reverse stroke and until the yarn is re-engaged by the cam box with the adjacent working needle, whereupon a pull is exerted on the yarn to release it as the cam box commences a fresh row of stitches.

Abstract: An individual yarn clamping and cutting device is provided for each yarn guide and is moved to an open position in response to movement of the yarn guide from active to inactive position. The yarn clamping and cutting devices are moved to a closed position by cam means carried by the rotating needle cylinder. A yarn guide shifting cam is provided for imparting a slight amount of downward movement to the yarn guides to shift the same from a first upper active position to a second slightly lower active yarn feeding position during introduction of the yarn to reduce the tension in the yarn as the needles begin to knit and to aid in preventing yarn breakage. The yarn guides are mounted to facilitate individual threading of the yarn guides and are mounted for outward tilting movement of their upper ends to a readily accessible threading position while the remaining yarn guides remain in the normal operating position.

Abstract: A pneumatic tensioning device (10) maintains a desired tension in a thread (18) as it is fed from a spool to a knitting or fabric weaving machine. A first tubular member (40) has an inner passageway (42) extending the length of the tube (40) that permits thread advancement therethrough. A second tubular member (46) surrounds the first tubular member (40) so that the inner walls of the second member and the outer walls of the first member define an outer passageway (48). An airflow is directed through the outer passageway in a direction that is the same as the direction of thread advancement. An orifice (54) communicates the airflow from the outer passageway (48) into the inner passageway (42) in a manner so that the direction of the airflow is reversed. The airflow thus flows in a direction that is opposite to thread advancement, wherein such opposing airflow causes a certain amount of tension in the thread.

Abstract: This invention relates to an improved device for measuring the length of yarn absorbed by a textile machine, comprising in known manner a rotating member driven by the yarn during displacement thereof. It presents three fixed guides over which the yarn passes and which are positioned near the rotating member so that the yarn is in contact with the rotating member along two substantially equal arcs of low value, for example from 20.degree. to 50.degree. and advantageously 30.degree.. The device is more particularly applicable to measuring the length of yarn absorbed per stitch on flat knitting machines.

Abstract: A disc type tensioning, or braking device for a float heel knitting machine.

Abstract: A yarn feed mechanism for a knitting machine incorporates a power operated yarn feed device, for example motor-driven rollers, a yarn take-up device, for example one or more pivotally mounted yarn take-up yarns, and a yarn restraining device, for example one or more yarn tensioning devices. The yarn feed mechanism is arranged so that yarn to be knitted follows a path from the yarn feed device through the yarn restraining device to the yarn take-up device and then to needles of the knitting machine.

Abstract: A device for regulating the length of thread absrobed by a knitting machine and/or for correcting the variations in tension of a thread supplying a textile machine, is disclosed. The device comprises a tensioning means of any type, a drive member whose rotation results in the movement of the tension-generating member of the tensioning means, a feeler element over which the thread passes and which is moved when the length of thread absorbed and/or the tension of the thread varies and two switches, one controlling the placing in rotation of the drive member in one direction and the other the placing in rotation in the other direction. The direction of rotation of the drive member is selected so that the corelative action of the feeler corrects the variation in the length of thread absorbed and/or of the tension which is the cause of triggering this rotation.

Abstract: In a weft thread magazine arrangement for a warp knitting machine there are provided a pair of transport arrangements positioned on each side of the machine. Also included is a carriage which lays threads in a continual manner from the transport arrangement on one side to the transport arrangement on the other. There is also provided a roller delivery arrangement to deliver the weft threads over a directional turning arrangement. The drive of said roller delivery arrangement is continually influenced by the speed and position of the carriage at any given moment. Suitably, this may be achieved by a computer controlled DC motor.

Abstract: Self actuating yarn feeding apparatus to feed yarn to a circular knitting machine when the machine makes a demand for the yarn and to cease feeding the yarn when the machine ceases demand for the yarn. The yarn is in variable circumferentially extending drive contact with the periphery of a frictionally surfaced rotating yarn feed wheel to feed the yarn to the machine. The arrangement being such that when there is a lack of demand for the yarn the degree of contact between wheel and yarn is not sufficient to feed the yarn and when there is demand for the yarn the degree of contact between wheel and yarn is sufficient to feed the yarn to the machine. The yarn extending through a yarn eyelet movable back and forth along a circular pathway in response to demand and lack of demand for the yarn by the machine to vary the degree of contact between wheel and yarn.

Abstract: A weft brake for a loom, especially for one of the shuttleless type, comprises a stationary blade and a movable blade cantilevered in overlapping positions on respective posts rising from a supporting plate, the free end of the movable blade being spring-biased toward the stationary blade for clamping a weft thread therebetween but being periodically deflected away therefrom for releasing the weft thread to facilitate its transportation through the shed of the associated warp threads. The weft thread passes between the stationary blade and a leaf spring forming an intermediate blade, inserted between the two other blades of the brake and cantilevered on the same post as the movable blade, so as to be frictionally restrained by the elasticity of that intermediate blade in the unclamping position of the movable blade.

Abstract: An apparatus for tensioning warp threads of a loom comprises a warp beam from which the warp threads are withdrawn by means of a support beam and a deflection beam. The deflection beam is secured to the support beam by means of bending springs acting in the direction of the deflected warp threads. The bending or deflection length of the bending springs is adjustable for preselected setting of the warp thread tension in that the bending springs are supported at their bending or deflection side by means of a bending-resistant support plate which is adjustable in lengthwise direction. These measures provide for a purely mechanical, simple, easily adjustable and functionally reliable tensioning apparatus which is particularly suitable for the pile warp of a Terry weaving machine.

Abstract: The knitting machine is provided with a yarn tension indicator for continuously monitoring the tension of an elastomeric yarn being withdrawn from a yarn supply source and fed to the needles of the circular knitting machine and for providing a constant visual indication to the machine operator of the tension in the running yarn. The yarn tension indicator includes a base plate and a pointer lever supported in a substantially horizontal position and for pivotal movement on the base plate. Fixed guides are provided for directing the yarn through a movable yarn guide supported for longitudinal adjustment on the pointer lever to urge the same in an upward direction. Weights are supported for longitudinal adjustment on the pointer lever for urging the pointer lever in a downward direction so that when the tension in the running yarn is proper, the pointer lever maintains a horizontal position which may be easily observed by the knitting machine operator.

Abstract: To permit ready disassembly of thread sensing and thread brake elements from a yarn feed device, the thread sensing, thread guiding and thread brake elements are, selectively, secured to a separate attachment or housing which is connected to the holder by means of a slidable shoe-socket arrangement which, additionally, carries the contacts for the stop-motion system of the machine so that, depending on yarn being used on the machine and supplied by the device, the supply guide element can be suitably assembled to the machine without disassembly of the thread feeding devices including the thread supply drums as such; or the stop-motion switches coupled to stop-motion sensing elements can be individually maintained or replaced.

Abstract: The supply portion to a thread supply drum is pivotally located on the holder for the drum, to pivot about an axis transverse to the axis of rotation of the drum; this supply portion carries a thread brake 24, an inlet eye 27, and a further inlet guide element 26. Preferably, the supply portion is removably located on the holder 1, for example by means of a plug-and-socket connection, a slide-in dovetail joint, or the like. Pivotal connection permits compensation for short-time tension peaks arising, for example, upon yarn drag, and combination with a stop-motion switch.

Abstract: A yarn take-up mechanism for a knitting machine, especially a flat V-bed knitting machine comprises a yarn take-up arm pivotally mounted at one end on a stanchion and urged by a spring to pivot so that its other end moves away from the stanchion. Said other end of the arm carries a movable yarn guide and the yarn path in the take-up mechanism is from a fixed yarn guide on the stanchion through the movable yarn guide and back to the other fixed guide on the stanchion, the fixed guides being close together and adjacent the location of the movable guide when it is in the position closest to the stanchion. The end of the take-up arm carrying the movable yarn guide is flexible whereas the remainder of the arm is stiff.

Abstract: An improved weft control device for shuttleless looms in which weft is drawn between a pair of friction plates mounted on individual post elements in a manner whereby their free ends are disposed in contiguous relation. The device provides a control lever fixed to the lower end of each post element which are operatively connected one to the other. One of the control levers is of greater length than the other and defines an indicating arm that is disposed in operative association with a band of indicating indicia provided on a support member for the post elements. By manually moving the indicating arm in one direction or the other to a pre-selected graduation of the indicating indicia, the post elements will rotate simultaneously and in opposite directions and the force with which one friction plate engages the other can be increased or decreased as desired.

Abstract: An attachment for a warp knitting machine is disclosed. The attachment produces a patterned effect on fabric knitted by the warp knitting machine. The warp knitting machine includes at least one warp beam, a thread separating mechanism, a knitting mechanism, and a first tensioning mechanism positioned between the warp beam and the knitting mechanism. The attachment includes a moveable supplemental tensioning mechanism operatively connected to the knitting machine for cyclically varying the tension on first and second groups of threads disposed on opposite sides of the supplemental tensioning mechanism. A mechanism is provided for cyclically moving the supplemental tensioning mechanism in first and second directions about a neutral position to alternately tension the first and second groups of threads.

Abstract: The device for feeding yarn in a textile machine comprises a set of feed driving rollers rotating at a speed exceeding the maximum yarn processing speed in the machine, a first yarn brake downstream of the driving rollers, a first swing support upstream of the rollers, a second yarn brake and a second swing support. Each swing support includes a movable member exerting by its weight a tension against the yarn which causes the latter to engage frictionally the driving rollers. The frictional force exceeds the force of the first yarn brake and advances the yarn about a length which is sufficient to cause the moving member of the first swing support to abut against a fixed stop member so that the tension is released from the yarn and the holding friction changes to a sliding friction which is lower than the braking force of the first brake and thus stops the decoiling of the yarn.

Abstract: A device for intermittently tensioning a yarn passing therethrough in which a motor cam acts on a tension train mounted on a fixed shaft. The tension train is composed of a tension adjuster which provides tension on a base plate, spring, and tension discs mounted between a stop and the tension adjuster. In an embodiment of the invention a method for intermittently tensioning a yarn by passing the yarn between the tension discs of the device described above.

Abstract: A warp knitting machine which includes a jacquard mechanism to control the pattern threads utilizes the jacquard mechanism to further control a thread breaking device and a thread tensioning device thereby providing an unusual thread pattern without the aid of a conventional pull thread.

Abstract: An apparatus for adjusting the thread feed rate and hence the thread tension of a multiple-feed circular knitting machine includes transducer means in the form of a resiliently biased rocker mountable on the machine. The rocker can operate one of two microswitches whenever the tension of a thread engaging the transducer is greater than a predetermined value and can operate the other when it is less than the predetermined value. The microswitches control the energization of a servomotor operable to increase or decrease the speed of a rotary drive for driving the machine's thread feed device as necessary in order to bring the thread tension to the predetermined value.

Abstract: A weft thread tensioning device for use on a warp knitting machine provides a means for testing the tension of the weft threads and, if the threads are not at the desired tension, tensioning the threads to a predetermined amount. The device includes a spring loaded lever and U-shaped bracket which adjust the tension on the weft thread just prior to insertion into the bed of the knitting machine.

Abstract: A flat knitting machine has a bobbin carrier rotatably supporting yarn bobbins from which yarns are led off to a rotary carriage through a protective device in the form of a channel member or tube for each yarn, to reduce the effects of air resistance and material attraction between the yarns. Deflector pulleys can be provided to increase the lengths of yarn within the protective device and yarn breakage detectors can be positioned at the entries to and exits from the device.

Abstract: In a knitting machine positive feed device of the type comprising a rotatable roller having a bracket mounted for free pivotable motion adjacent the roller under the control of a pair of weighted arms which are attached to the bracket, the fixed yarn guides which are disposed adjacent the opposing ends of one of said arms are supplemented by an intervening movable yard guide which is weighted for movement under the influence of gravity to take up slack in the yarn caused by any overfeed from the roller. The movable yarn guide can also be associated with a stop-motion switching device operative to turn off the knitting machine if the yarn should break.

Abstract: A pair of pressure disks through which the thread may pass are pressed together by a controllable electromagnetic force generated by a pressure electromagnet acting on at least one of the disks. The thread is passed over an oscillating lever which is urged by the tension of the thread from a first position to a deflected position and, when in the deflected position, closing an electrical contact which opens the circuit to the pressure electromagnet acting on the disks to return the lever to the first position, thus opening the contact. The magnetic force of a lever reset magnet is adjustable.