Abstract: A system and method are described for storing and transmitting a sequence of presentations for display on a viewer's computer. A viewer interface is configured to receive a request to access the presentation and to transmit a script to the viewer's computer responsive to receipt of the request. An output module is configured to establish a state where a current presentation in the sequence is presented. The output module presents the first item to the viewer's computer in response to the request to receive the current item. The viewer interface is further configured to present the second item to the viewer's computer. The first presentation item corresponds to a first content of a first content type and the second presentation item corresponds to a second content of a second content type, the first content type being different from the second content type.

Abstract: Airflows A1, A2 of compressed air are generated along a predetermined guiding surface 9, and directed against the yarn layer surface F of a package, causing the yarn end to be retrieved. A high-speed airflow A1 from the compressed air, and an accompanying airflow A2 which is pulled along with the high-speed airflow A1 lift the yarn end E from the yarn layer surface F. The yarn end E can be guided and retrieved with airflow A1, making use of the Coanda effect along the guiding surface 9. Accordingly, a yarn end can be easily and reliably retrieved using a low-capacity compressor.

Abstract: An apparatus and method for interrupting delivery of sliver to a spinning frame for spinning sliver into yarn and winding the yarn onto a spindle utilizing a sliver stop motion. The sliver stop motion is positioned on a respective drafting system of the spinning frame. The sliver stop motion is mounted to the spinning frame so as to overlie the back drafting rolls for stopping the motion of sliver being drafted by the back drafting rolls responsive to a break in yarn being wound onto the spindle. The stop motion includes an elongate pivoting member which is pivotally mounted to a frame mounting member. The frame mounting member is pivotally mounted to the spinning frame. At the stop motion's proximal end, a yarn contact member extends outwardly therefrom so as to underlie and slidably contact yarn being directed to the respective spindle. A sliver comb is connected to and extends outwardly from the distal end of the elongate pivoting member so as to overlie sliver being drafted by the back drafting rolls.

Abstract: A yarn spindle is provided having a housing, a spindle drive shaft rotatably mounted in the housing, and a cylinder fixedly attached to the spindle drive shaft. The cylinder includes a downwardly extending circumferential skirt, with the skirt and the spindle drive shaft defining an annular space between them. The skirt has a bottom edge with at least four thread cutting slots disposed therein, the slot being a substantially rectangular notch through the thickness of the skirt. The at least four thread cutting slots are equally spaced about the bottom edge. The spindle also includes a waste thread spool statically mounted on the housing for shielding the spindle drive shaft against contact with waste yarn. The waste thread spool includes a frusto-conical barrel having a top end, a bottom end, an axial hole, and an inclined outer wall. The outer wall is angled approximately 30 to 35 degrees from the vertical and has a substantially vertical groove formed therein.

Abstract: A method and apparatus for automatically removing a slub from spun filament yarn and a sliver or roving of staple fibers. The sliver or roving of staple fibers are fed through a drafting apparatus to prepare a continuous bundle of staple fibers. The filament yarn is pretensioned such that a texture is temporarily substantially removed. The continuous bundle of staple fibers and the filament yarn are combined downstream of the drafting apparatus. The combined continuous bundle and the filament yarn are fed into a spinner. The spun filament yarn and staple fibers are monitored to detect imperfections of a predetermined magnitude. A first signal is generated upon detection of an imperfection of the predetermined magnitude. The feeding of the staple fibers is stopped in response to the first signal. The core yarn is clamped at a predetermined position in response to the first signal.

Abstract: In the case of a spinning machine comprising several spinning stations, which each contain one drafting unit, and comprising depositing sites for cans containing sliver, transport devices are provided for the transporting of the delivers from the cans to the spinning stations. The transport devices comprise delivery rollers which can be stopped independently of the delivery rollers of other spinning stations and independently of the pertaining drafting unit.

Abstract: In the case of a spinning machine with several spinning stations, which each comprise a drafting unit, and with depositing sites for cans containing sliver, transport devices are provided for transporting the slivers from the cans to the drafting units. The transport devices as well as the drafting units comprise devices which can interrupt the transport of an individual sliver.

Abstract: An apparatus for severing a yarn and processing the resultant end of the separated yarn comprising a controllably rotatable abrasive element (1) disposed between two yarn-tensioning mechanisms (2,3) which hold the yarn in position and under tension for engagement with an abrasive surface of the abrasive element. The abrasive element (1) is mounted stationary with respect to the yarn-tensioning mechanism (2,3) such that the yarn 4 can be wrapped around the abrasive element (1) at a predetermined angle of wrap (.alpha.).

Abstract: A textile spinning apparatus comprising an automatic servicing tender and a textile spinning machine having a plurality of spinning stations, the tender being controllably movable into operational alignment with selected stations, the tender including a tender control mechanism for controlling a sequence of tender operations upon operational alignment of the tender with a selected spinning station, the textile spinning machine including a machine control mechanism having a mechanism for receiving an operational alignment signal from the tender and a mechanism for triggering the tender to commence the sequence of tender servicing operations in response to the alignment signal.

Abstract: A stop motion device for a textile strand processing machine including a sensor positioned between a supply package and a take-up package for sensing the presence or absence of a strand within a defined sensing range of the sensor and a strand breaker positioned between the supply package and the sensor. The strand breaker includes a pivot for pivotally mounting the strand breaker for movement between an inoperative position in disengagement with the strand and a strand breaking position in engagement with the strand. The pivot is positioned with relation to the path of movement of the strand for pivotal movement of the strand breaker in the direction of movement of the strand and towards and into the path of movement of the strand for breaking the strand upstream of the take-up package. A release cooperates with the sensor and the strand breaker for releasing the strand breaker when the sensor senses the absence of a strand within its sensing range.

Abstract: In the case of a process for producing packages used as feeding packages for twisting, it is provided that two prestrengthened yarn components are wound up side-by-side as a double yarn. If one yarn component breaks, the winding-up is interrupted. The unbroken yarn component is gripped and held ready at a given point so that it may be taken up for a piecing and wound off the partially wound spool, while taking along the broken yarn component from the partially wound spool.

Abstract: In the event of a yarn breakage the pressing roll of the inlet roll pair of a drafting arrangement is raised by a slubbing guide element from the inlet drafting roll or cylinder while simultaneously forming a clamping location for the slubbing or other fiber material.

Abstract: The slubbing stopping device comprises a movable part having a magnet and a fixed part having a magnet. One of these magnets is an electromagnet and the other a permanent magnet. The movable and fixed parts can assume an operating position in readiness for clamping the elongate or rope-like fiber material which may be constituted by a silver, roving or slubbing or the like. These movable and fixed parts, when in the operating position, are connected by the magnetic field of the permanent magnet. An electrical energy supply delivers electrical energy to the electromagnet so that the movable and fixed parts can be separated from one another and the movable part assumes a slubbing clamping position. The electrical energy supply powers the electromagnet such that the permanent magnet and the electromagnet, which previously adhered to one another by magnetic attraction, are repelled so as to separate the permanent magnet and electromagnet from one another.

Abstract: In an arrangement for interrupting the operation of an individual drafting frame at a spinning machine, devices are provided for reducing the contact of a sliver with the bottom rollers and particularly for lifting the sliver off the bottom rollers which are operative when the pressure rollers are lifted off the bottom rollers.

Abstract: An apparatus for supporting a stop member of a stop motion device of a textile ring spinning machine is provided. The apparatus includes a carriage having a cam portion for removably receiving and manipulating the projecting cam follower portion of the stop member, a device for reciprocating the carriage and a device for releasably positioning the carriage on the reciprocating device in a predetermined position. The carriage is disengagable from the positioning device for movement therefrom sufficiently to permit removal and replacement of the stop member from the carriage and is reengagable with the positioning device for positioning the carriage in its predetermined position. Preferably, the carriage and the positioning device each includes cooperatively configured portions for releasable interengagement with one another to position the carriage in its predetermined position.

Abstract: An improvement in a roving stop motion for a spinning machine of the type having a series of pairs of drafting rollers, the stop motion including a clamping member mounted on a lever arm drivenly connected to an actuating rod by a carriage which is selectively mountable at differing locations along the actuating rod. The actuating rod is responsive to roving breakage to drive the lever arm to cause the clamping member to separate the feed rollers from one another and press the roving against one roller. The positionability of the carriage enables the lever arm to be properly disposed with respect to the feed rollers when the spacing between the roller pairs is varied.

Abstract: A method for producing a spun yarn from staple fiber sliver by supplying an additional yarn of a different nature to the staple fiber sliver while drafting same, and imparting twists thereto by the use of an air injection nozzle. The supply of the additional yarn is started after arrival of the staple fiber sliver at the air injection nozzle.

Abstract: A yarn monitoring device comprises in association with each doubling spindle (1) a sensing arm (7) monitoring the upwardly directed yarn run between yarn guide eye (3) and feed roller (V), which arm is mounted by means of a mounting bush (9) for limited swinging on a rocker shaft (6). The mounting bush (9) comprises a slot (12) extending in its circumferential direction, in which engages a stop pin (11) extending radial to the rocker shaft (6) and fixed relative thereto. In the slot (12) is a lining in the form of a substantially U-shaped clip (13) of spring steel, whose semi-circular connecting part (13b) lies at the end surface (12b) of the slot (12) directed away from the spindle and whose U-arms (13a) extend parallel to the side walls (12a) of the slot (12), abut thereagainst and are inwardly bent at their free ends (13c) so that they grip on to the stop pin (11) in the swung up position of the sensing arm (7).

Abstract: The spinning or twisting machine comprises a plurality of drafting rolls, a plurality of associated spindles and positioned between them a plurality of yarn breaking devices pivotable between an upright spinning machine operating position into a yarn breaking position. According to our invention the yarn breaking device is movable by a positioning device from its yarn breaking position into an operating position.

Abstract: A clamp is disclosed to be mounted on a yarn spinning machine and, if a roving of the yarn should break, serves to clamp the roving preventing it from further unravelling. The clamp comprises a housing body including a member for defining a passage guide for the roving and a blocking element mounted by the housing body to be moved by a biasing spring from a detained position to a roving clamping position. A sensor is provided to sense the breakage of the roving for actuating an electromagnet for releasing a lever that normally engages and holds the blocking member in its retained position, whereby the blocking element is moved by the spring to it's clamping position to thereby retain and clamp the roving against the member. A guide channel is attached to the housing body and further supports a fastening mechanism for mounting the clamp to the spinning machine.

Abstract: Roving or sliver clamping device at the drafting unit of a spinning machine, with a clamp segment which enters in the operative position between the upper inlet roller and the lower inlet roller of the drafting unit, and which clamp segment raises the upper inlet roller from the lower inlet roller, and clamps the roving or sliver against the upper inlet roller, whereby the clamp segment is acted upon by an actuating element which causes its roving or sliver-clamping position, and the clamp segment is maintained in the position in which the roving or sliver clamping device is at rest by a holding element. The holding element includes means for storing energy and it positively counteracts the actuating element.

Abstract: A spinning machine for producing a thread includes a multiplicity of spinning stations at which sliver is spun into thread, each of the spinning stations including a thread-break sensor and a slubbing-stopping device connected to the sensor and released by an electrical current from the sensor for arresting the sliver after each thread break sensed by the sensor, each slubbing-stopping device including an electrical energy storage device, a charging circuit for the storage device, and a device for discharging the storage device for operating the slubbing-stopping device.

Abstract: The apparatus for producing two-component thread comprises a twisting mem to which the two components of the two-component thread are fed, and means for severing one of the components as the feed of the second component ceases, including a hollow cylinder operatively connected to a drive and having an annular slit made therein, with at least one flat knife accommodated in the internal space of the cylinder in the area adjoining the annular slit.

Abstract: In order to make possible automatic restart of a spinning machine drafting frame after strand breakage in an easy way, a movable blocking member is insertable between the drive roller of the lower feed belt and the lower feed belt in the direction of the line of contact of the lower feed belt and the drive roller, this blocking member on engagement raising the lower belt from its drive roller by operation of a connecting rod attached pivotally to the detent member. Additional roller pairs present upstream of the feed belts are preferably provided with means for simultaneously lifting the various upper rollers from the lower rollers with or without holding the yarn or thread fixed on engagement of the detent member.

Abstract: A draw frame for a spinning machine is provided with roving blocking mechanism associated with its inlet rollers actuable on rupture of the remittant thread to arrest movement of the roving and is further provided with a sensor for detecting the continuity of the roving being fed from a source of supply and a roving clamp situated between the sensor and the blocking mechanism. The blocking mechanism and the roving clamp are arranged to be simultaneously operated in response to a signal from the sensor or in response to rupture of the thread.

Abstract: Apparatus for use in combination with a traveling unit including sensor and remote actuator means to interrupt supply strand feeding to drafting systems of a textile spinning machine. A collar means is rotatably mounted on an elongate strand guide and one side thereof serves as a strand engaging surface. An abutment member mounted on the strand guide serves as the other of the strand engaging surfaces. Means are provided for moving the strand engaging surfaces longitudinally along the elongate strand guide and into a proximate relation with one another upon the sensing of a broken yarn so as to pinch the supply strand and thereby interrupt feed of the supply strand to the drafting system.

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 device attached to a spinning or twisting machine, designed to monitor the integrity of two threads merging under tension into a yarn, has a carrier swingable about a horizontal axis and provided with a thread guide, such as a pair of parallel pins, bracketing the yarn downstream of the merger point. A rupture of either thread lets the carrier rotate, e.g. by gravity, from an unstable normal position by half a turn into a stable off-normal position to impede the advance of the remaining intact thread whereby the latter also breaks. Such action, however, is prevented when the yarn is under reduced tension, as during shutdown or startup of the machine, by a locking mechanism arresting the carrier in its normal position. The locking mechanism may include an electromagnet whose winding can form part of a circuit signaling the displacement of the carrier into its off-normal position in response to a thread break.

Abstract: A device for interrupting feed of a roving on a drawing frame, having a feed roller pair, e.g., a powered bottom roller and a top roller tensioned against the bottom roller by springs, includes a clamp for lifting the top roller away from the bottom roller and clamping the roving against the circumference of the top roller. The clamp is disposed on a lever pivotable about an axis parallel to the axes of the feed roller pair and is shiftable with respect to a clamping edge, in the feed direction of the roving, toward the circumference of the top roller. The clamp includes a tongue which initially engages in the nip between the rollers and a portion having a toothed profile which cooperates with the clamping edge by engaging the roving.

Abstract: A device for interrupting the feed of a roving to drawing frames of a thread spinning machine of the type wherein each drawing frame comprises a plurality of pairs of upper and lower drawing rollers, of which the lower drawing roller, located on a roving in-feed side of the drawing frame, is provided with a clamping segment for interrupting the roving feed in a released position thereof in response to a broken-end detector, which monitors the presence of a spun thread, is improved by the provision of a suction device, associated with the drawing rollers on a thread formation side of the drawing frames, for collecting rovings present in a drawing frame when the roving feed thereto is interrupted. In accordance with a perferred embodiment, the suction device comprises suction tubes which are mounted for movement away from the drawing rollers and lockable in respective operating and nonoperating positions.

Abstract: Apparatus for use in combination with a traveling unit including sensor and remote actuator means to interrupt supply strand feeding to drafting systems of a textile spinning machine. Interruption is accomplished through the cooperation of an elongate strand guide and a rotatably mounted collar including a longitudinal projection. Upon rotation of the collar, the supply strand is pinched between the collar projection and the elongate strand guide causing strand breakage.

Abstract: A wrapped yarn forming apparatus is disclosed, which is adapted to form a wrapped yarn composed of a core strand, such as a yarn sliver, and a binder strand which is spirally wrapped about the core strand. The apparatus includes a hollow spindle adapted to coaxially mount a supply package of the binder strand, yarn feed means for advancing the core strand through the spindle, and yarn take-up means for winding the resulting wrapped yarn into a package. In the event of yarn breakage, means are provided for interrupting the drives of the various components, and also for terminating the continued withdrawal of the binder strand from its supply package and the continued wind-up of such strand on the take-up package, which would normally occur where only the core strand is broken. Thus piece-up of the apparatus is facilitated by avoiding the necessity of removing the wound binder strand from the take-up package.

Abstract: A device attached to a spinning or twisting machine, designed to monitor the integrity of two threads merging under tension into a yarn, has a carrier in the form of a disk or a stem rotatable about an axis and provided with a thread guide such as an eyelet, or a pair of pins parallel to that axis, bracketing the yarn downstream of the merger point. A rupture of either thread, detected by a separate sensor or by one of the bracketing pins, generates or releases a force which rotates the carrier around its axis by about half a turn to impede the advance of the remaining intact thread whereby the latter also breaks and the machine is stopped automatically, or manually in response to an alarm signal.

Abstract: A device for detecting a break in one of two tensioned threads merging into a yarn comprises a support on which a guide member with two yarn-bracketing pins is pivotable about a horizontal axis. The guide member is provided with a hole penetrated by a stud of smaller diameter having a head with two or more chordal ridges of different peripheral widths each of which, when brought into a horizontal position above the stud axis, contacts a rabbet on the guide member disposed below its center of gravity to hold that member in a metastable position from which it is dislodged by a difference in the tensions of the two threads. When that difference surpasses a certain threshold, upon rupture of one of the threads, the guide member tilts into an unstable position from which it gravitates through substantially half a turn into an inverted stable position, thereby entangling the remaining intact thread with its pins and inhibiting the advance thereof so that it, too, will rupture.

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 bearing rail is provided extending along each side of the draw frame and spaced laterally from the outer edges of the double upper rollers. At the end of the each rail, in the area when the thread exits from the exit rollers, each rail is provided with two carriers, one of which is provided with a light source and the other which with a light receiving photo-cell. The light source on one side of the drawing frame is arranged in association with the thread being drawn adjacent the photo-cell on the other side so that the light source causes this remote thread to cast a shadow on the photo-cell adjacent to it. Similarly the light source on the other side, the thread remote from it and the photo-cell opposite it are also aligned. The shadow on each photo-cell produces an alternating current which is then independently fed to a circuit and switch means, housed at the inlet end of the bearing rail.

Abstract: A spinning frame is provided with a fiber break guard having a fiber guide which as a consequence of the breaking of one of the individual fibers is displaced to cause the breaking of the other fiber. For a certain and rapid breaking of the remaining fiber, the displacement of the fiber guide caused by the remaining fiber, or at least the displacement of an associated member causes a pinching of the remaining fiber in a clamping device or the activation of a fiber separation device for cutting through the remaining fiber.

Abstract: A device is provided for interrupting the feed of a roving to drawing frames on ring spinning machines in response to thread breakage at a respective spinning unit. The device includes a clamping segment annularly clamped about a lower drawing roll and having abuttments for selectively lifting the upper drawing roll away from the lower roll to interrupt the feed of roving in response to movement of the clamping segment to an interrupting position. To control the clamping segment, a locking detent lever is provided which is spring-loaded into a locking position engaging the clamping segment and movable to an unlocking position in response to an electrical drive mechanism which, in turn, is controlled by a thread end break detection device. In particularly preferred embodiments, a capacitor is used to energize the drive means to unlock the lever, the capacitor being charged during normal spinning operation and discharged for a preset time period during the unlocking operation.

Abstract: In an open-end spinning apparatus with an opening roller 2 and a supply device 1, a sliver clamp 5 associated with the supply device 1 is provided to interrupt the sliver feed and can be actuated when the supply roller 10 continues to run by a yarn monitor 31 or a lap monitor 12. In the fiber transport direction, a further, second sliver clamp 6, actuable simultaneously with the first sliver clamp 5 is arranged in front of the supply device 1 at a distance which is as large as the average staple fiber length. Preferably the moving part 62 of the further sliver clamp 6 is rigidly connected to the clamping lever 53 of the first sliver clamp 5.

Abstract: A roving moving to a spinning machine passes between top and bottom input rolls of which the top roll is adapted, upon breakage of the roving, to be raised by a lift member which is movable into engagement with the spindle of the top roll and carries with it a clamping element which serves to clamp the incoming broken end of the roving against the top roll to retain it ready for subsequent rethreading into the nip of subsequent drafting rollers.

Abstract: In the combination of a textile yarn spinning machine, a traveling unit movable along the spinning machine for monitoring production of attenuated strands, and supply strand interruption mechanism responsive to the traveling unit, an improvement which comprises a wedge member movable relative to a back roll pair of a drafting unit between a normal running position withdrawn from a nip formed between the rolls and an interruption position of insertion into the nip, together with actuation mechanism mounted above and overlying the corresponding drafting unit.

Abstract: A device is disclosed, as an attachment to a spinning, or a doubling frame, for stopping the rotation of the spindle and the sliver feed whenever a sliver or a thread breaks and for giving, at the same time, a warning signal (e.g. a luminous signal) to a watching operator. The device comprises a thread feeling whisker connected to a circuit which controls electromagnetic clutches connected to the spindle, and the spindle braking and stopping mechanism is connected by a flexible cable to a sliver-pinching press so that as soon as the spindle is being braked and stopped the sliver is pinched and sliver feed is discontinued. The electric circuit also comprises an indicator lamp.

Abstract: A method and apparatus for reducing waste of supply strands passing to a series of yarn processing units, in which a detector moves along the yarn processing units alternately in a first direction and a second direction opposite from the first direction while sensing breakage of any one of a series of strands being delivered from the processing units and also sensing the direction of movement of the detector, and in response to sensing breakage of any strand, and irrespective of the direction of movement of the detector, passage of the corresponding supply strand is interrupted in its course to the corresponding yarn processing unit by a flowing stream of air being directed from a nozzle moving with the detector into engagement with a corresponding, normally inactive, strand interrupting member for actuating the same.

Abstract: Ring spinning machine includes a drawing frame having, at a given location therein, a draw-up roll for drawing therethrough in a given direction a roving being spun into a thread, and a roving-clamping device responsive to a break in the thread for clamping the roving, the roving-clamping device being controllably deflectable transversely to the given drawing direction in vicinity of the given location.

Abstract: Device for monitoring thread travel in a winding device of a textile machine having, disposed in the travel path of the thread, a thread guiding member for a take-up coil, including a thread monitoring device disposed in the thread travel path upstream of the thread guiding member, the thread monitoring device having means for producing a noise signal when a thread is travelling along the path, a high-speed thread clamping device disposed adjacent the thread travel path, and means responsive to a discontinuance of the noise signal for actuating the high-speed thread clamping device to grip a thread present in the travel path.

Abstract: A yarn severing and holding apparatus for use in a system for changing spinning cans in which synthetic filamentary yarns are deposited. In this apparatus an arm supported, independently of the can transporting means, for rotation at a level between the yarn feeding device and the cans, has a slide mounted thereon for traversing movement lengthwise of the arm. This slide carries a cutting device and also a device for clamping the severed end of the yarn deposited in the full can. This insures that the cut off end of the yarn cannot drop back into the full can and that on the other hand the free end can drop into the still empty can immediately after the cutting operation. Moreover, the severing and holding apparatus is physically divorced from the can-transporting means so that the latter may be designed for either rotational or translational movement.

Abstract: A cutting arrangement for a filament monitoring system for use in a draw-twister and the like comprises a gripping member, a cutting member and an intermediate filament guide, all of which are mounted on a spring actuated slide. Actuation of the slide causes the gripping member and cutting member to grip and cut the filament, the filament guide maintaining the filament in proper position.

Abstract: Apparatus for surveying the condition of roving is mounted on an automatic yarn knotting device movable along a spindle row in a textile machine having a drafting device for roving allocated to each spindle. When a roving breakage is indicated, the knotting device stops at the appropriate position and a first detecting device on a pivoted lever is moved to a position in which it checks the presence of roving passing through the drafting device. If there is no roving due to exhaustion of supply, no knotting is effected, but if roving is present the knotting device is prepared and a second lever moves a second detecting device to two output rollers for delivery of roving from the drafting device. If this second device detects no wrapping of roving on one of the two output rollers, the knotting process is initiated.

Abstract: Positive interruption of supply strand feeding to drafting systems of a textile yarn spinning machine is assured by the cooperation of rings for threadingly receiving corresponding supply strands and plugs for positively entrapping a threadingly received supply strand upon movement of a plug into a position penetrating a corresponding ring.

Abstract: A yarn stop-motion device for use with a yarn-processing apparatus comprising yarn break-detector means and yarn-severing means positioned close to each other and preferably combined in a single unit. This device is characterized in that the point at which the yarn break is detected by the device and the point at which the yarn is severed by the device are both positioned above or on the same side of the yarn-processing apparatus associated with the device.