Abstract: Disclosed is a weaving method with which the yarn tension of several part groups with at least one warp thread per part group is controlled or adjusted separately, in order to follow a respective reference yarn tension profile during weaving, where, for at least one part group, the reference yarn tension profile is changed during weaving, where the reference yarn tension profile is determined and changed separately for at least two part groups, and where each reference yarn tension profile is selected from a collection of different reference yarn tension profiles. Also disclosed is a weaving machine provided with yarn tensioning elements, a storage unit in which said collection is provided, and a control or steering unit in order, in cooperation with the yarn tensioning elements, to adjust or control the yarn tension in separate warp threads using the indicated weaving method.

Abstract: A knitting line comprises a plurality of yarn feeders from which a downstream machine draws respective yarns. The machine is provided with selection elements adapted to vary the state of selection of the yarn feeders in relation to the angular position of the machine. Each of the yarn feeders is provided with a stationary drum and with a yarn count sensor arranged to generate a pulse per each yarn loop unwound from the drum. A selection signal is periodically sent to the yarn feeders, which is indicative of the state of selection of the individual feeders in relation to the angular position of the machine.

Abstract: A method and a knitting machine for producing a knitted product composed of fiber material fed by a roller pair (11c) are described. The stitches are formed as usual by knitting elements (3) being raised out of a non-knitting position into a fiber take-up position, while at the same time previously formed stitches are being knocked over, and being withdrawn again after the fiber material (6) is inserted. The presence of fiber material is monitored by means of a sensor (22), which when there is no fiber material present emits an error signal, as a result of which the knitting elements are prevented from being raised further into the fiber take-up position. According to the invention, when the error signal occurs, the knitting elements (3) are withdrawn from an intermediate position again without the previously formed stitches being knocked over and without the fiber material being taken up.

Abstract: A knitting line comprises a plurality of yarn feeders from which a downstream machine draws respective yarns. The machine is provided with selection elements adapted to vary the state of selection of the yarn feeders in relation to the angular position of the machine. Each of the yarn feeders is provided with a stationary drum and with a yarn count sensor arranged to generate a pulse per each yarn loop unwound from the drum. A selection signal is periodically sent to the yarn feeders, which is indicative of the state of selection of the individual feeders in relation to the angular position of the machine.

Abstract: A method and a knitting machine for producing a knitted product composed of fibre material fed by a roller pair (11c) are described. The stitches are formed as usual by knitting elements (3) being raised out of a non-knitting position into a fibre take-up position, while at the same time previously formed stitches are being knocked over, and being withdrawn again after the fibre material (6) is inserted. The presence of fibre material is monitored by means of a sensor (22), which when there is no fibre material present emits an error signal, as a result of which the knitting elements are prevented from being raised further into the fibre take-up position. According to the invention, when the error signal occurs, the knitting elements (3) are withdrawn from an intermediate position again without the previously formed stitches being knocked over and without the fibre material being taken up.

Abstract: The present invention relates to an apparatus for monitoring the yarn or yarns in a carpet making machine or the like, a so-called tufting machine, in which the yarn or yarns are applied on a bed material, e.g. a bed weft, during movement of the yarn or yarns from a yarn magazine, e.g. a creel with a number of yarn bobbins (B) on a number of posts (S) in one or more storeys, to the bed material each through its transparent or translucent tube (R), e.g. a hose, at least one light emitter (4) and one light receiver (6) being positioned at each tube (R) for yarn which is to be in motion and to be monitored, and the light receivers (6) are rehearsed to convert received light into an electric signal which is connected to an electronic circuit for triggering an alarm and possible stoppage of the machine when the electric signal indicates that the yarn in its tube (R) is not in motion.

Abstract: The invention relates mainly to a method for controlling the motion of a yarn stopper magnet in a measuring feeder for textile machines, preferably for weaving machines of air- or waterjet-type. The stopper magnet has a soft-iron armature connected to a yarn stopper element, which armature co-acts with at least one electromagnetic coil in order to achieve the desired motion of the stopper magnet. During an initial part of the time for the motion, according to the invention, said electromagnetic coil/-coils is/are supplied with a control voltage with an amplitude considerably exceeding the average level of the control voltage during the remaining part of the motion, in order to achieve an optimally fast motion with low input energy amount and thereby a low heat development, as well as low kinetic energy (speed) of the stopper element at the end of its motion.

Abstract: A method and apparatus for monitoring run/stop conditions of a yarn, particularly in a knitting or warping machine utilizing a yarn feeler. The yarn feeler includes an electronic, yarn actuated transducer operating with variable gain amplification of run input signals which are further processed to final output signals representing the run/stop conditions. The amplification gain for the run input signal is automatically electronically controlled with a time delay and is adjusted towards a floating minimum which is just sufficient to derive stable final output signals. The, reaction time delay allows compensation for naturally occurring parametric fluctuations of the run input signal, while a sudden drop of the run input signal due to yarn breakage is processed to a final output stop signal.

Abstract: A woof yarn tension device for weaving machines, has a controllable tension device which acts upon the woof yarn and which, at least on the output side, has a yarn guide eye. In order to reduce the stressing of the woof yarn, the number of the deflection points for the woof yarn existing on the feeding side are reduced in that the yarn guide eye of the woof yarn tension device is simultaneously constructed as a woof yarn monitor.

Abstract: A rotation speed control apparatus for a yam winding storage drum has a unit for driving the drum, and a scanning device for scanning the quantity of storage windings on the drum which provides signals proportional with the number of the storage windings. The scanning device includes a light source for generating light beams along optical paths guided so as to impact the surface of the storage windings wound on the drum. A plurality of sensors are arranged so as to receive a related light beam along a respective light path with a light intensity varying in proportion with the number of storage windings. A plurality of light guiding blocks are each arranged on a respective one of the optical paths between the storage windings and the sensors.

Abstract: In a multi-phase weaving machine, an apparatus (16) for monitoring warp yarn movement (3a, 3b) in particular leno warp yarns. The drawing-off movement or the drawing-off speed of the warp yarns (3a, 3b) can be detected by an electronic sensor (6a, 6b; 6c) so that it can in particular be determined whether the drawing-off movement or the drawing-off speed has a very low or relatively large value. If the value is very low, in particular when the warp yarn is standing still while the weaving process is running, it can be concluded that the warp yarn has broken. If the value of the drawing-off speed lies above a preset threshold value it can be concluded that the warp yarn is being driven in an undesired manner so that an error signal (13) is produced in order to interrupt the weaving process.

Abstract: A feeder apparatus for automatically controlling in real time the tension of a textile yarn, includes a control device for continuously controlling the tension of the textile yarn, before supplying it to a textile machine, the control device controlling a swinging lever arranged downstream of a drum and driving an adjustable movable shield element adapted to intercept a light, thermal or electromagnetic radiation impinging on a sensor which transforms the received radiation into an electronic signal proportional to said radiation and driving a display of the yarn tension.

Abstract: A method of preparing pattern information for a jacquard fabric produced on an electronically controlled knitting machine is disclosed. Yarn color information that is to be fed to yarn feeders for the courses in a knit fabric is prepared. This information is resolved into information for knitting and welting which is to be fed to different wales for each yarn feeder. Tucking information for the different colored yarns is separately prepared. This tucking information is resolved into tucking and welting pattern information. The knitting and welting information which is to be fed to different wales for each yarn feeder is combined with the separately prepared information on tucking and welting to form synthesized pattern information for knitting, welting, and tucking.

Abstract: A device for controlling the cyclic operation of a machine, in particular a textile machine, is of the type able to self-learn each machine working cycle. It is arranged to compare data obtained by suitable sensors during normal operation of the machine with data obtained by the same sensors during the self-learning cycle, and a control unit arranged to halt the machine when a discrepancy between the data occurs. The central unit modifies the data of the self-learning cycle when an error which is repeated constantly with time is noted for one and the same sensor.

Abstract: A monitoring system for knitting machines, in particular for such machines for the knitting of hosiery or socks, having a number of yearn guards allocated to each yarn for infeed into the machine, the guards each being operative, in response to a movement or absence of movement of the yarn, respectively, detected thereby, to generate and output signal to stop the machine in the event of yarn or thread breakage or other fault int h e yarn infeed, by the intermediary of preferably electronic control unit connected to the yarn guards. The control unit includes memory and comparison systems and is arranged to gather and memorize, during an introductory, correct and approved working or report cycle of the machine, information representing the yarn infeed phase in the form of the actual pattern of output signals from the yarn guards.

Abstract: A method and an apparatus for monitoring a plurality of successive signals to detect a loss of the successive signals and to detect whether the signals are substantially alike and do not deviate from each other by more than a recognized, acceptable extent. The monitored signals are converted to digital signals that are fed to a blocking and comparing circuit. The blocking and comparing circuit selectively permits generation of an alarm signal for indicating unacceptable deviations in the monitored signals. The monitored signals also are fed to a registration circuit which registers whether only recognized acceptable deviations are present in the digital signals and, if so, causes the blocking and comparing circuit to prevent generation of an alarm signal.

Abstract: In monitoring the yarn tension at each of a plurality of yarn processing stations, the mean value of the monitored tension is continuously determined at each station, and the differential between the monitored value and the mean value is also continuously determined. In addition, an overall mean value is generated which is representative of an average of the mean value signals from all of the individual stations, and the overall mean value is compared with the individual mean value of each station. In the event the mean value signal at a particular station differs from the overall mean value signal by more than a predetermined tolerance limit, an alarm signal is generated.

Abstract: A method and apparatus measures the tension of an advancing yarn which is subject to interruptions of the yarn path, resulting for example from the severance of the yarn. During such interruptions, the zero setting of the tension sensor does not always return to zero, thereby providing an erroneous output reading during subsequent yarn advancing cycles. In accordance with the present invention, a circuit is provided which identifies such errors and sounds an alarm when the error exceeds a predetermined limit. Also, the erroneous output signal is input as the zero point signal for the subsequent yarn advancing cycle, and during such subsequent cycle, the tension is determined on the basis of the newly set zero point.

Abstract: A textile machine having a multiplicity of yarn manipulating instrumentalities includes a yarn break detector. The specific machine disclosed is a tufting machine having a multiplicity of reciprocable needles threaded with respective yarns supplied from a source and the yarn break detector includes at least one metal washer carried by a respective yarn between the needles and the source. The washers are mounted above a trough having first and second spaced apart strips of electrical conducting members formed in a Vee configuration having a small gap between the plates at the lower apex of the Vee. The plates are connected in an electrical circuit which is maintained open by the gap until a yarn is broken and the washer carried thereon drops into the trough to short the plates together and close the circuit. The circuit includes a relay which energizes an indicator light and deenergizes the tufting machine motor when a yarn is broken.

Abstract: For optical monitoring of a knitted article for faults during the manufacture thereof in a knitwear processing machine, the knitted article is scanned line by line by the optical scanner. The scan signals generated in the process are delivered to a digital processing circuit. In a reference mode, the scan signals are stored as pattern signals in the digital processing circuit. In a subsequent operating mode during manufacture of the knitted article, the scan signals are compared as operating scan signals with the pattern signals corresponding to the scan position, to check if they match. If they do not match, a fault signal is generated.

Abstract: A thread storing and supplying device for textile machines, especially knitting machines comprises a housing, a driveable thread storage drum provided in the housing for supporting several windings of a thread, a thread guiding element arranged to supply a thread to the thread storage drum, and a thread brake and a knot monitor which together form a combined thread braking and knot monitoring unit located immediately after the thread guiding element as considered in a thread running direction this thread braking device includes two freely rotatable axes-parallel rollers, one of the rollers being displaceable relative to another of the rollers which is non-displaceable against a braking spring force the thread braking device also has an adjustable abutment which defines a maximum displacement value for the gap between the rollers, and the non-displaceable roller is arranged so a thread is deflected over it. The displaceable roller is mounted on a supporting means which is pivotally mounted on the housing.

Abstract: The stop motion activator includes a solenoid coil with an elongate armature core supported for axial movement within the solenoid coil. The armature core is movable inwardly to a first axial position within the solenoid coil when the solenoid coil is energized and is manually movable outwardly to a second axial position when the solenoid coil is deenergized. A control switch is operatively associated with the movement of the armature core and is in a closed position to permit energization of the solenoid coil when the armature core is in the second axial position and is moved to an open position as soon as the armature core is moved inwardly to the first axial position to immediately deenergize the coil after the core has moved inwardly. The armature core is operatively connected to the stop mechanism of the knitting machine to immediately stop the operation of the knitting machine when a malfunction is detected.

Abstract: A device for detecting break of any of a plurality of yarns arranged closely to each other in a spinning or weaving machine such as loom, knitting machine, warping machine, etc., includes sensor electrodes disposed in correspondence to the respective yarns, high-input-resistance amplifiers, separators and a logic circuit, in which each yarn is let runs between adjacent separators. When any of the yarns is caused to stop running due to trouble such as a break, the output of the corresponding high-input resistance amplifier becomes high in potential and a signal is issued to the output of the logic circuit to thereby stop the machine while giving an alarm.

Abstract: A monitoring circuit for a knitting machine with at least one yarn feeding arrangement comprises two yarn monitoring devices which are provided with switches and connected via a first rectifier circuit and an indicating lamp to a supply line. The supply line is coupled to a supply voltage source in such a way that when one of the two yarn monitoring devices is operated, the indicating lamp is only activated by one half-wave which is associated with the yarn monitoring devices and belongs to an a.c. voltage signal generated by the supply voltage source. To improve the recognizability of an indication by the indicating lamp, the a.c. voltage signal generated by the supply voltage source has a first interval during which the signal has exclusively positive half-waves and a second interval during which the signal has exclusively negative a.c. voltage half-waves.

Abstract: A jacquard circular knitting machine provided with a needle cylinder driving mechanism capable of optionally and readily controlling the rotary motion of the needle cylinder according to the pattern to be knitted. A motor interlocked through gears or the like with the needle cylinder rotates according to a needle cylinder rotating procedure stored previously in a magnetic memory medium. Actuators operate according to a pattern forming procedure stored in another magnetic memory medium as a signal is provided by a sensor for detecting the rotary motion of the needle cylinder. Thus a jacquard circular-knitted fabric having predetermined patterns can be knitted efficiently. In addition to the above, a machine is provided with a third magnetic memory medium for storing a yarn feed element switching procedure to carry out a plurality of yarn feed element switching operations at optional timings when necessary while a single course of a fabric is knitted.

Abstract: The location of a warp thread break in a weaving loom using electrically conductive drop wires bridging an electrode pair upon occurrence of a warp thread break includes applying opposing known voltages across opposite ends of the electrode pair, establishing current circuits including the voltage sources, the electrode pair and a fallen drop wire, and determining the distance between one end of the electrode pair and the fallen drop wire by calculations using known values corresponding with the voltages and measurements of values corresponding to the current values in the current circuits. A system for carrying out the method includes electrode pairs having a detectible resistance, conductive drop wires, voltage sources connected to the electrode pairs, current detecting/measuring devices, computerized calculating system, warp break location indicators and connecting circuit elements.

Abstract: A yarn storing device (1) comprises a storage drum (2) and a sensor (5) arranged at the withdrawal end (3) of the storage drum (2). The sensor (5) has the form of an eyelet (6) for guiding the yarn (4) and generates a signal during the withdrawal of yarn (4) having a frequency corresponding to the number of turns of yarn withdrawn per time unit. For enhancing the reliability of detecting the withdrawal of yarn on the basis of the sensor signal, the eyelet (6) of the sensor (5) is movably mounted on a housing (7) of the sensor (5) and comprises a light-reflecting surface (11) wherein a light-emitting element (8) and a light-receiving element (9) are fixed to the housing (7) such that the light generated by the light-emitting element (8) falls on the light reflecting surface (11) and is directed towards the light-receiving element (9) when the eyelet (6) has a predetermined relative position with respect to the housing (7).

Abstract: An apparatus for determining the location of a warp thread break in weaving looms using drop wires, including detection devices 6 to identify warp thread breaks, movable drop wire locators 7 to determine the warp thread break locations, switching devices 8 arranged to actuate the drop wire locators 7, causing the drop wire locators to move until a fallen drop wire is encountered, and indicators on the drop wire locators to indicate the position of the drop wire locator along the warp threads.

Abstract: In a safety device, in particular for flat-bed knitting machines, with which, by means of a shutoff device, stoppage of the carriages associated with a drive apparatus of the machines in the event of a change in the power of the carriages as compared with applicable normal operation resulting from disruptions in removal of the goods, loop formation and yarn insertion, excessively high loop tightness specification or the like, is effected. A measuring device is provided for detecting a torque-proportional variable of the drive mechanism. Actual values of the torque-proportional variable are deliverable to a central processing unit and an adjustable comparator device, and the comparator device is provided by the central processing unit, with threshold values for this torque-proportional variable, serving as processed actual value for the torque-proportional variable. Finally, by means of the comparator device, the shutoff device is triggerable as soon as the applicable threshold value is exceeded.

Abstract: The take up means (5) is inhibited in response to a predetermined operating conditions of the flat knitting machine.

Abstract: A pattern monitoring method and apparatus wherein the movements of each individual yarn are detected and recorded. A piece of textile goods is produced, and all the yarn movements for making that piece are recorded, that record being then used as a standard. Additional pieces are made, and the yarn movements during the making of the additional pieces are detected and similarly recorded. The movements may, immediately or eventually be compared to the standard. An error signal is given when there is no match; however, an allowable error can be selected so that the error signal is given only when the error is greater than the selected allowable error. The error signal can be a light, or may be a stop motion device.

Abstract: This invention relates to a device for detecting the presence of an individual yarn in an advancing lap of parallel yarns, constituted by: detector disposed on one side and in the vicinity of this advancing lap, adapted to detect the presence of a yarn moved away from the lap by a blower means disposed on the other side of said lap; an arrangement, controlled by the detector, for stopping the advancing lap or for triggering off an alarm system, wherein: it is composed, in known manner, of a plurality of parallel comb teeth, between which the advancing yarns pass; and the blower is placed at the base of said teeth and directs the flow of air towards the tip of these teeth. The invention is more particularly applicable to warp knitting machines.

Abstract: The yarn tension at each of a plurality of yarn processing stations is continuously monitored, while continuously determining the mean value of the monitored tension at each station, and while also continuously determining the differential between the monitored value and the mean value. Also, an alarm signal is generated whenever the mean value leaves a predetermined tolerance range, and whenever the differential value leaves a second predetermined tolerance range. An alarm signal may serve to actuate a visual error indicator, or to shut down the associated processing station.

Abstract: Logic signals corresponding to a detected thread break and/or thread loop in a package being wound on a bobbin are evaluated within a logic circuit to communicate the quality of a thread package. The logic signals can be processed in various ways.In one embodiment, discrimination is made of repeated logic signals produced by a single thread break.In another embodiment, the total number of logic signals are counted.Blocking arrangements can be provided to block logic signals caused by the same thread break or thread loop.

Abstract: The invention relates to a thread movement sensor comprising an arm with at least one thread guide. The invention solves the problem of sensitivity of the sensor to the vibrations of the machine by making a part of the arm an element of a magnetic circuit of coil, the latter being connected to the control circuit of a knitting machine.

Abstract: The present invention relates to a dispensing device for yarn which includes a loose skein holding section and a pair of feed rolls having a bite therebetween to move yarn from the skein holding section to a discharge side. A yarn gathering guide is positioned between the skein holding section and the feed rolls and a loop separating chamber is located between the skein holding section and the gathering guide. The feed rolls are responsive to a switch which is activated by tension on the yarn on the discharge side.

Abstract: A yarn-feeding apparatus for selective positive feeding of several yarns to a knitting machine, comprising a sensor for generating sensor signals, the sensor signals representing the respective feeding condition or non-feeding condition of the yarns, and an error detection unit connected to the sensor for turning off the knitting machine in response to predetermined sensor signal combinations representing a yarn breakage and/or a yarn over-feed and/or a yarn change fault. For shortening the response time of the error detection unit and for enhancing the reliability thereof, the error detection unit comprises a working position sensing unit for generating position data representing the working position of the knitting machine, a logic circuit for deriving a yarn changing signal from the sensor signals, and a memory unit for storing yarn changing position data.

Abstract: A yarn-feeding apparatus for the positive feeding of several yarns to a circular mechanism of a circular knitting machine, comprising fingers which are arranged in the circular mechanism for receiving and guiding the yarn into a knitting position or taking the yarn out of a knitting position, including delivery apparatus with each including a yarn-transporting element and a yarn-guiding element which is movable back and forth between a feeding area in which the yarn is in engagement with the yarn-transporting element and a nonfeeding area, and wherein for each yarn-guiding element there is provided an electric position sensor which produces an electric signal in dependence on the position of the yarn-guiding element.

Abstract: A device for the positive feeding of a yarn, particularly for knitting machines, having a rotatable storage drum adapted to have a yarn supply wound thereonto and withdrawn therefrom over a rim thereof, a stationary yarn guide element located below the rim and outwards of the periphery of the rim in a center plane extending through the axis of rotation of the storage drum, a yarn guiding element located in the yarn path between the rim and the yarn guide element and formed with a yarn guiding edge, and a stoppage sensing element having a portion extending parallel to a tangent of the rim transversely of the yarn path between the yarn guiding edge and the yarn guide element, and being mounted for pivotal movement under the action of a biasing force.

Abstract: The arrangement comprises a two-armed movable lever, which is swivel-supported on the loom and which is held by a warp thread, found in a stretched state and guided through a yarn guiding eyelet on the one movable lever arm, countering the effect of a spring means, which engages on the lever arm that is free of eyelet, and which is in a regulating position, which compensates the alternating tension on the warp thread, with the movable lever closing an electric circuit when brought into signal position as a result of the unstretched or missing warp thread.

Abstract: The invention relates to a yarn supply device group for attaching to a textile machine, in particular a ring knitting machine with electrically controllable switching and actuating devices in every supply device which are connected in a signal-transmitting circuit by a bunch of lines common to all supply devices to a central control mechanism. Previously, every supply device in the group had to be "marked" manually prior to the start of operation. In addition, a bunch of lines with large dimensions was necessary, since each supply device needed at least one separate line.

Abstract: A fault pre-warning device for use in tufting machines has a switching strip (11) over which the carpet web is guided in such a way that the switching strip (11) is acted on by a defined force in the switching direction. On the occurrence of excessive tension in one or more of the warp threads the switching strip (11) initiates a switching process.

Abstract: A stop motion switch adapted to be in threaded engagement with an elongated filament and responsive to a break in the filament to cause the switch to go from a "first" to a "second" position (off to an on position) composed of a dielectric body and a rocker arm, the rocker arm being composed of two terminal portions, joined together by a median portion and a filament guide on at least one of the terminal portions, the longitudinal axis of the terminal portions being essentially perpendicular to the longitudinal axis of the median portion.

Abstract: A device for the photoelectric supervision of a warp loom for irregularities in the yarn supply of a yarn sheet has an infrared radiation source and receiver, which are arranged so that the infrared beam is alternately interrupted and released, in time with the frequency of the oscillating eye needles, by the needles as well as by the yarns passing therethrough. This periodic supervisory signal sequence is periodically processed by a gating circuit only during a preset gating time period (T.sub.X) within each beam release phase (T.sub.p). The signal values issued in each window pulse gating phase are compared in a comparator circuit with a comparison value. If the latter is not attained, a control signal is generated for the warp loom.

Abstract: The system according to the invention comprises a sensor composed of a movable unit formed by an electrical circuit in which are placed two supple blade switches closed by a rocking member in response to the presence of a yarn. Said circuit comprises a conductor wound on a magnetic core. The data transmitting device comprises a fixed looped conductor of which one part is parallel to the path followed by the sensor and traverses the core. Means are provided for generating oscillations in the looped conductor, as well as means for detecting a variation in the oscillating conditions induced by a change of state of the electrical circuit due to the closure of one switch and indicating that the sensor has met up with a yarn. Due to the detection of the variations in the oscillating conditions, it is possible to find out the number of breakages occurring in the textile machine.

Abstract: The invention relates to a system for electrically monitoring warp yarn ruptures, comprising drop wires which in case of rupture of a warp yarn will fall from the warp yarns on an electrical contact rail. The locating time to determine the precise site of warp yarn rupture is thereby shortened substantially. To achieve this aim, the contact rails are severally divided in the longitudinal direction, that is, in the direction of the weft yarns. Light-emitting diodes are mounted at each of such divisions which they bridge. Those LEDs lighting up in case of warp yarn rupture permit rapidly reading off the narrower range within which a warp yarn rupture has taken place.

Abstract: A safety device is provided for a knitting machine to ensure that the carriage stops in the case of sudden variation of the speed as a result of an impact or other occurrence such as tangling of the yarn into a ball. The device includes a metal strip formed with equidistant perforations assembled parallel to one of the needle bars of the knitting machine. A bridge integral with the carriage moves along this strip, and has on one side an emitter and on the other a transducer. When the carriage moves the succession of perforations gives rise to pulses of length inversely proportional to the translational speed of the carriage. A CPU processing unit processes the signal obtained after amplification and shaping of the pulses and delivers a STOP signal when a sudden disturbance is detected in the movement of the carriage.

Abstract: A yarn eveness detector in a textile machine generates an analog signal in response to yarn uneveness. The analog signal is digitized and subjected to real time processing in a computer for analysis of both cyclic and non-cyclic yarn irregularity. A signal may be generated in response to irregularities exceeding a certain value.

Abstract: A warp stop motion apparatus includes individual disengageable coupling and control elements which have fork-like ends that are capable of surrounding the lateral sides of drive pins extending outwardly from the opposite sides of the end portions of the respective inner movable serrated bars which slidingly extend into a housing part that is oscillated back and forth by an individual electrical motor. Oscillation of the housing part causes the inner serrated bars to oscillate in their longitudinal direction with respect to outer stationary serrated bars in which they are positioned.

Abstract: A device for indicating the triggering of a signal transducer in, for example, thread surveillance and monitoring systems.