Abstract: Apparatus is disclosed herein which detects breaks in spinning yarns in ring spinning frames or the like and in particular senses vibrations inherent to a yarn guide disposed on a bobbin when the yarn guide comes into contact with the spinning yarns. The apparatus achieves quick inspection of whether breaks occur with the spinning yarns by the presence and absence of the vibrations, thereby monitoring joints in the spinning yarns and the operating state of the spinning machine.

Abstract: A centralized control system for open end spinning machines comprises a group control unit essentially consisting of a first spinning control means composed of a plurality of sequentially operated logical elements connected in series, the first spinning control means producing from the respective logical elements parallel outputs each of which is fed to a plurality of spinning units so as to control the spinning operation thereof, and an individual control unit essentially consisting of a second spinning control means each of which constituent is the same as the first spinning control means. A spinning mechanism includes a yarn breakage sensor provided in the stream of spun yarn, a driving means for driving the spinning mechanism including a plurality of driving motors, controlled by the output from the group or individual control unit.

Abstract: A method and apparatus of detecting faulty operations of spinning units of an open-end spinning machine by monitoring the faults appearing in the yarn being produced by the machine and generating a fault signal responsive thereto. Another speed responsive signal is produced responsive to the speed that the yarn is being delivered from the spinning compartment of the machine. The fault signal is fed to a variable gain amplifier which has its gain controlled by the speed responsive signal. The signal produced by the amplifier is then differentiated, shaped, and integrated. The integrated signal is, in turn, compared with a threshold value for determining when the faults in the yarn exceed a predetermined level.

Abstract: An apparatus for monitoring the yarn delivered by an open end spinning turbine which has an electric motor for driving the turbine with a predetermined rpm. The apparatus includes a measured value transmitting arrangement responsive to changes in the current consumption of the electric motor for generating a signal when the change in the current consumption exceeds a predetermined threshold value. The measured value transmitting arrangement is responsive to a reduction in the current consumption of the electric motor and generates a yarn breakage indicating signal when the reduction in the current consumption falls below a predetermined value indicative of yarn breakage.

Abstract: In order to monitor irregularities in textile yarn being produced in an open-end spinning turbine of the type having an elastically mounted rotor, there is provided a sensor arranged to sense radial deflections experienced by the rotor or its bearing and associated with the occurrence of such irregularities.

Abstract: A guide eye is provided for a filament or strand material. An electro optical control mounted on a guide, to detect the presence of a filament or strand material, has its focus on the inner surface of the guide eye closest to the sensor. The filament or strand material moving within the guide eye, causes light to reflect from the sensor light source to the light sensor creating a signal indicating the presence of filament or the strand.

Abstract: Device for temporarily stopping the operation of spinning stations of a spinning machine equipped with means for automatic inspection and/or cleaning of the machine after an interruption in the spinning operation at a spinning station and for thereafter restarting the operation of the respective spinning station includes a monitoring device associated with each spinning station having means for producing an intentional interruption of the spinning operation at the respective spinning station when a given value of a characteristic of the uninterrupted spinning process is reached or exceeded and only when no other spinning station serviced by the means for automatic inspection and/or cleaning of the machine is out of operation due to an interruption of the spinning operation performed thereat that requires correction.

Abstract: In a thread-joining device capable of traveling from spinning station to spinning station of a spinning machine having respective means for feeding sliver thereto, a device for measuring a dimension of the sliver at the respective feeding means of the spinning stations.

Abstract: In the production of yarn in an open-end spinning turbine having an elastically mounted rotor bearing, a break in the yarn or an operating state which influences yarn quality is detected by means of a sensor which produces a signal representative of radial deflections of the bearing and an evaluation circuit which responds to the absence of and/or a change in the signal component produced by the sensor as a result of radial deflections created by the fiber material present on the rotor.

Abstract: The draft imparted to sliver during regular operation of a sliver drafting apparatus is correctively varied in proportion to uniformity variations then detected in the sliver. During at least part of each period of start-up of the apparatus, the sliver is subjected to a prescribed correction draft approximately equal to an average of the draft corrections applied to the sliver over a relatively long time interval during the last-ensuing regular operation of the apparatus. During that initial part of each start-up period required for the apparatus to accelerate to substantially full operating speed, the prescribed correction draft is either not applied or, alternatively, is scaled in proportion to the speed of the apparatus.

Abstract: Apparatus and method for displaying information regarding the operating conditions of ring spinning machines in a textile mill wherein at least one traveling unit, supported for travel along a predetermined path for traversing one or more ring spinning machines, carries detectors for monitoring ends of strand material normally being formed by traversed machines and a data system responds to the detectors for determining the condition of the traversed machines from the condition of the monitored ends. In accordance with this invention, additional sensors are provided on each machine for signalling operating characteristics of the machines.

Abstract: A method and apparatus for detecting the faulty working of spinning units of an open-end spinning machine by monitoring the faults in yarn as it is fed from the spinning machine. An electrical signal is produced by a sensor indicating faults appearing in the yarn. Another signal of predetermined frequency corresponding to the speed of delivery of the yarn from the spinning machines is generated. The electrical signal produced by the sensor is electrically multiplied by the signal of predetermined frequency for producing a differential signal. This differential signal is filtered, shaped and integrated and subsequently compared with a preset threshold value for producing a signal indicating when the occurrence of faults exceed a predetermined threshold. This signal can be used for stopping the spinning unit.

Abstract: An improved web monitoring and control apparatus is disclosed for use with web handling machinery, such as printing presses and the like which are of the type that have a generally continuous web of material being printed or otherwise processed. The apparatus directs modulated infrared energy onto the web and detects the reflection of the energy from the web. The apparatus detects the occurrence of a web break and shuts down the machinery. The apparatus includes an automatic arming control which activates the apparatus when the machinery moves the web at some preselected percentage of its total speed and also includes apparatus for detecting when the detector lens has become soiled and provides a warning to the operators that conditions are approaching which may result in a false web break detection which would shut down the machinery.

Abstract: A guide is placed between a strand of fibers and a winder, which twists the strand as it is wound. The guide is circular so the strand may be maintained in an unconstrained twisting path between the receiver and the supply as it is being wound and twisted and includes an optical sensor mounted about the area of movement of the filament to detect the presence of the filament and stop the winding process if the strand breaks.

Abstract: In order to monitor irregularities and changes in structure of yarn being produced in an open-end spinning turbine provided with its own individual drive motor, there is provided a circuit which senses and evaluates changes in the current consumption by the motor.

Abstract: An apparatus for monitoring yarn travel at a multiple spindle spinning machine which is equipped with a suction device servicing at least one group of the spindles. In a collecting channel of the suction device there is arranged a probe which upon passage therepast of fiber flocks or the like delivers an electrical signal to an evaluation circuit equipped with a periodically resettable signal counter having pre-settable counter value and an alarm device. The alarm device can be switched-in by means of a further cumulative counter with a higher, pre-set counter value. This further cumulative counter is coupled by means of a logic circuit with the periodically resettable signal counter in such a manner that the cumulative counter is reset whenever there is missing once or twice a signal from the periodically resettable signal counter.

Abstract: Open-end spinning machine apparatus is provided which includes a yarn measuring device at each of the individual spinning units for determining the transverse dimension of the running yarn produced at the spinning units. In addition, intermediate storage means are provided for electronically storing yarn measurement data at each of the individual spinning units. In order to process the yarn measurement data, a process computer is provided at a mobile servicing instrument which is selectively movable to respective servicing positions at the spinning units. The process computer and mobile servicing instrument also includes means for carrying out servicing operations at the respective spinning units in the event of detected yarn flaws or the like.

Abstract: Method of determining incorrectly operating spinning stations of a spinning machine which includes counting with counting means for each spinning station the number of anomalous interruptions of the operation thereof, interrogating at the time intervals the count at the respective counting means with an operating device capable of traveling relatively to the spinning stations, and issuing a fault signal automatically if a predetermined count of the respective counting means for the spinning stations is reached or exceeded, and device for performing the foregoing method.

Abstract: A two-piece snap-on yarn trapper including a molded U-shaped bracket that snaps onto a yarn detector switch and supports a plural-turn helical spring. This spring is held inwardly bowed in the bracket so that the turns are held open or separated on the yarn side to provide a series of V-grooves for receiving the yarn that is drawn tightly thereinto by the trip lever of the yarn detector switch thereby to trap the yarn when it goes slack. The bracket is provided with a pair of inner edges or guides to guide the yarn to the middle portion of the helix where trapping is most effective and reliable. The helical spring is compressed and snap-in assembled on a pair of angularly-disposed stubs received in opposite ends thereof to hold the spring in its bowed condition on the bracket due to the tension of the helix.

Abstract: In monitoring a continuous sequence of work positions on a textile machine for thread breakage, a magnetic probe is driven along a path adjacent the ring traveler at each work position so as to generate a signal upon detection of the traveler as it rotates with the thread and provide no signal when the traveler ceases to rotate due to thread breakage. To simplify the electrical connection to the probe, the drive arrangement for the probe includes at least one conductive metallic drive band connected to the probe and to a driving source for moving the probe along the path past the work positions. A detector is then coupled to the drive band to detect the electrical signals carried thereby from the probe.

Abstract: An open end spinning machine is provided with individual thread guides for each station. The thread guides direct compressed air along an axial channel in which the thread travels. The air expels the thread in the direction reverse to normal thread travel whenever it is desired to return a broken thread to the spinning chamber and rotor. The apparatus includes a thread cutting mechanism, disposed between the pneumatic thread guide and the spinning chamber, for cutting the thread to a fixed length so that it may be reattached to the fibers in the rotor without discontinuities.

Abstract: An improved sensor arrangement for use in an apparatus which travels a detector along ttextilestrand processing machines such as spinning frames for determining the absence of ends of yarn from locations therealong at which such ends normally are present and for thereby locating ends down on the textile strand processing machines. The arrangement disclosed herein includes an optical system defining a light path for focusing light reflected from yarns and a plurality of sensors for receiving light passed along a common light path by the optical system and for generating pulse electrical signals in response to variations in illumination in respective, vertically spaced and aligned, fields of view.

Abstract: An improved technique for stopping the advance of spun yarn through the draw-off rollers and distributing cylinder of an open-end spinning machine in response to a detected yarn breakage condition is described. A reversible clutch is selectively interposed between first and second oppositely rotating drive shafts and the cylinder, which in turn is coupled to the draw-off rollers. The clutch is operated from a normal forward advance condition to an operated reverse condition for a duration corresponding to a variable-duration control pulse generated in response to a yarn breakage condition upstream of the discharge end of the machine withdrawal tube. The duration of the control pulse is adjusted to dynamically brake the forward motion of the advancing yarn to a stop. The control pulse is removed soon enough to prevent reverse movement of the yarn.

Abstract: Method and apparatus for stopping a flyer frame at the time a roving breakage occurs in an outer layer of any roving package during the spinning operation thereof. When such roving breakage occurs, an abnormal amount of floating flies separated from the broken end portions of the roving scatter in the space between the twisting and winding mechanisms. Such abnormal amount of flies interrupt a light beam emitted from a light emitter, disposed at a position adjacent to and outside one end of the alignment of the twisting and winding flying mechanisms, toward a light receiver, disposed adjacent to and outside, but at the other end, of said alignment. When such interruption occurs the light receiver issues a signal indicating the interruption of the light beam to a power supply relay via a particular control circuit which identifies the abnormal amount of floating flies from the usual amount of floating flies.

Abstract: The apparatus is particularly adapted for detecting breakage, run-out or excessive slackening of running sliver strands passing from a creel to the drafting rolls of a textile drafting machine, and includes reed switches which are actuable by movement, into proximity therewith, of magnet-carrying members which normally are maintained distal from the switches by engagement with the sliver strands. The reed switches are protectively mounted and are so located with respect to the magnet-carrying members as to minimize the number of reed switches required for operation of the apparatus. The channelled mounting for the reed switches also provides separating vane guides for the adjacent running strands of sliver, the guide walls having rounded end protuberances to effect better separation; both the guide elements and magnet-carrying members being coated with a smooth plastic to obviate snagging of sliver.

Abstract: Open end spinning apparatus is provided which includes a magnetic reed switch for controlling sliver feed. A yarn sensor magnet attached to a movable yarn sensor engageable with a running yarn is disposed so as to open the magnetic switch and interrupt sliver feed upon occurrence of a yarn breakage. In order to prevent the need for moving the yarn after a piecing operation so as to properly engage the yarn sensor, an auxiliary magnet is provided which is movable into position to magnetically move the yarn sensor away from a blocking position in front of the yarn takeoff passage at a spinning unit. The auxiliary magnet is controlled by way of its position, and/or its magnetic field strength, so as to also selectively control the operation of the magnetic reed switch during piecing operations, while maintaining the sensor magnet, and yarn sensor out of a blocking position in front of the yarn takeoff passage.

Abstract: Apparatus for detecting whether one thread selected from a number of threads is in motion, while no other thread is in motion, or whether a set of threads selected from a number of sets, each having two or more threads, is in motion, while no other set is in motion. The apparatus includes a signal generator associated with each thread for generating an electric signal in response to the movement of the associated thread. The signal generators are coupled sequentially to signal indication apparatus. If the prescribed thread movement is detected, the signal generating apparatus inhibits generation of an alarm indication. If the prescribed thread movement is not detected, the signal generating apparatus activates a trigger device to initiate an alarm.

Abstract: A servicing arrangement selectively displaceable along an open-end spinning machine which includes a number of individual spinning stations. At least one measuring head is arranged on the displaceable servicing means so as to selectively monitor the quality of the running thread or yarn at the individual spinning stations. A control apparatus is operatively associated with the measuring head and receives signals therefrom, whereby the control apparatus regulates elements for arresting a spinning operation at a spinning station and/or marks individual spinning stations and/or blocks a piecing operation at the spinning stations when the quality of the running thread or yarn at such stations is below a predetermined quality.

Abstract: In the processing of a band of fiber material at a plurality of processing locations in a textile machine which operates while periodically being unattended and receives the fiber material band to be processed from supply containers, a sufficient supply of fiber material to the machine is assured by automatically monitoring the quantity of fiber material in each container, and producing an output signal when the monitoring indicates that the quantity of fiber material in a container has reached a lower limit value.

Abstract: An improved thread monitoring arrangement for open-end spinning machines is provided. A traverse rod extending along a plurality of open-end spinning stations carries individual thread monitors, moveable therewith, for monitoring thread breakage at each of the respective stations. The thread monitors and traverse rod are disposed intermediate the spinning stations and take-off rolls, and are disposed and configured for accommodating thread-piecing operations without requiring movement of the thread monitors.

Abstract: A filament supplied to a textile machine is held under tension by a thread mounted on a weighted or otherwise biased lever which trips a switch to arrest the machine upon rupture of the filament. In normal operation, the lever is held against a stop by the tension of the thread supplemented by the force of a magnet whose attraction diminishes rapidly over the swing range of the lever, the biasing force slightly exceeding the magnetic force in the normal lever position to prevent oscillations in response to minor fluctuations in filament tension but to initiate a rapid cutoff in the event of a break.

Abstract: A plurality of signal generators are provided, one signal generator being associated with each object for example threads, strips, or the like whose motion is to be detected. Each signal generator generates an electric signal upon detection of movement of its associated object. The signal generators are connected in a series circuit, each end of which is connected to the input of a separate signal amplifier. The connections between adjacent signal generators in the series circuit are successively grounded. The signal amplifiers have their outputs connected to a gate circuit, the output of which is connected to the device for successively grounding the signal circuit connections so that, if a signal is generated simultaneously by at least one signal generator on each side of the grounded connection, operation is interrupted.

Abstract: To prevent periodically recurring thickened portions of thread from open end spinning machines, a thread thickness sensing signal is conducted to a mono stable blocking multivibrator having an unstable blocked time just under, for example, ninety percent, of the time of pull off of thread during one revolution of the turbine, so that the distance of thread passing through the sensor during the unstable time is just slightly less than the circumference of the spinning turbine of the open end spinning machine. If other thickened portions result from a specific circumferential point of the turbine, resulting in periodic defects, the mono stable multivibrator will be triggered again and again; the trigger signals is summed, for example, by an integrator and if the sum of the pulses reach a certain value, a defect signal is generated, for example, stopping the machine. Before being applied to the mono stable multivibrator, the signals are preferably dynamically limited.

Abstract: In the method, the number of defective portions of the yarn, occurring at periodic spacings within a predetermined time period, is detected to provide a detected value. This detected value is compared with a predetermined desired value of the number of defective portions within such predetermined time period. If the detected value exceeds the desired value, an output signal is provided or released to a stop device, control device, or the like of the spinning machine. The device comprises a thread monitor connected to a pulser which produces pulses responsive to variations in the yarn thickness. The output of the pulser is supplied to a thick portion monitor which detects long pulses produced responsive to relatively long defects in the yarn, and the thick portion monitor is connected to a time switch which, in turn, is connected to a signalling device, stop device, or control device for the spinning machine.

Abstract: Method and apparatus for controlling the operation of the open-end spinning frame which comprises measuring the number of rotations of the take-up roller means or a winding roller, controlling the relative timing of the reverse rotation of the take-up roller means and a winding roller of each spinning unit in association with the time of starting the normal driving of the fiber supply roller of each spinning unit and the time of starting the normal driving of the take-up roller and the winding roller based on the measured number of said rotations, and controlling the relative timing of the time of stopping the driving of the take-up roller and the winding roller in associated with the time of stopping the fiber supply roller based on the measured number of rotations.

Abstract: A spinning machine with a plurality of spinning locations or stations is equipped with automatic or semi-automatic spool-changing mechanisms. The machine also has a servicing device, designed for travel along the machine and for repairing thread breakages at some particular spinning location. The presence of this servicing device or carriage at a spinning location would interfere with the operation of the spool-changing mechanism. A controller delivers signals to an appropriate receiver in the servicing device and causes it to depart to a neutral zone at the end of the machine.

Abstract: A trapper for trapping the yarn in a knitting machine and holding it, under normal slackening when knitting certain patterns, to prevent unwanted tripping of the detector switch and machine shutdown. This yarn trapper consists of a one-piece wire member having a two-turn helix with a pair of supporting arms bent out radially and outwardly from opposite ends thereof at a common angular point on the periphery of the helix and having inwardly bent mounting hooks at their ends. These arms are held slightly spread apart from their normal relaxed condition when the trapper is snap-mounted on the yarn detector switch to relieve the pressure between each of the half-turns and the full turn and thus provide a pair of semi-circular traps formed by the half turns in light touching contact with different portions of the full turn to frictionally hold even the thinnest yarn if it should be pulled thereinto upon attempted swinging of the trip lever.

Abstract: A device is disclosed for detecting yarn breaks in drawing frames and spinning frames comprising a permanent magnet attached to the ring support of the textile machine and an electromagnetic impulse detector also attached to the ring support, close to the path of the traveler which is made at least partially of a ferromagnetic material, said impulse detector being connected, through an amplifier, to a yarn cutting device positioned upstream of the feeding rollers and of the yarn stretching wheel. The electromagnetic impulse detector consists of a coil wound onto a ferromagnetic core.

Abstract: A method of and apparatus for piecing up the broken yarn in an open end spinning machine wherein the yarn breakage that has occurred in a spinning unit of the machine is pieced up or jointed with the fiber material supplied into a rotor while the spinning unit is operated at the ordinary high spinning speed and while the various elements of the spinning unit are driven at the same speed as the high spinning speed.

Abstract: A filament monitoring device for knitwear manufacturing machines and of the kind having a filament guide arranged to move out of its operating position when a predetermined filament tension is exceeded and to be returned into the operating position with a force less than the breaking tension of the filament for automatic reapplication of the machine drive is, according to the invention, characterized by the provision of a guided slide member carrying only the filament guide and the armature of a magnet which holds the slide member in the operating position, and by a cable connection between the slide member and a return piston which is reciprocable in a compressed air cylinder and adapted to return the slide member to the operating position.

Abstract: Faults in produced yarn occurring by fouling of spinning units can be detected by measuring changes in the cross-sectional diameter of the yarn and producing a control signal indicating irregularities. The apparatus of this invention includes a measuring device for measuring the cross-sectional diameter and producing a signal representative thereof, which signal is processed in a discriminator circuit, including at least a correcting circuit with a non-linear characteristic, an integrating circuit and a comparison circuit to compare the integrated signal with a predetermined standard, thereby producing the control signal.

Abstract: An electrical process and device are described wherein interruptions in the passage of yarn from a series of supply bobbins, used in succession, to a wind-up bobbin are detected by a yarn breakage surveying device that transmits an impulse for each interruption. Some of these interruptions are due to supply bobbin changing and others to yarn breakages. Only the interruptions due to breakages are transmitted to a counter by way of a gate that receives the said impulses as well as periodic signals from a timing device. The timing device is actuated for spaced periods initiated by signals from a differentiating circuit for each change from "no yarn" to "yarn present" indicated by the surveying device, the latter being connected to the differentiating circuit as well as directly to the timing circuit.

Abstract: Method and apparatus for starting, interrupting or stopping spinning of a fasciated spun yarn. Staple fibers are false twisted into a yarn, a fluid eddy is applied to the bundle, and separate suction is applied, cutting off temporarily the suction air current separately provided. Yarn formation is continued while re-applying the suction air current separately applied.

Abstract: In a textile yarn processing machine, such as a two-for-one twister and the like, having spindle assembly stations for the processing of yarn and each including devices forming a rotating balloon of running yarn and spindle control mechanisms, such as start and stop devices; the combination therewith is provided of a yarn guide eyelet and monitoring mechanism for operating the spindle control mechanisms in response to the absence and presence of yarn running therethrough, as follows. A yarn guide eyelet limits the upper end of the rotating balloon of yarn during passage of the running yarn therethrough which causes forces on the eyelet in the running direction of the yarn.

Abstract: To localize a conductor break occurring in a conductor being twisted into a communications cable in a two stage twisting operation the faulty wire is first ascertained and the fault in that wire then subsequently located using a probe placed between the twisting apparatus and a take up drum, with the twisting process then stopped and the fault corrected. In one particular embodiment which is disclosed all wires are short circuited, for example, at the end of the twisted cable which is wound on the take up drum, the wires entering the twisting arrangement are divided into two groups of equal size with each of the groups connected to one end of an a-c voltage source symmetrical with respect to ground through high resistance series resistors with the voltage drop at the series resistors then detected to locate the faulty wire and the probing of the twisted structure done capacitively using a probe for determining the exact fault location.

Abstract: A magnetically responsive circuit is arranged in the yarn breakage detection portion of a knitting machine for providing a visual indication of yarn breakage and for simultaneously switching the operating state of a drive coil-actuated clutch which feeds yarn into the machine. The drive coil is serially connected with a magnetically actuated reed switch which responds to the detection of yarn breakage to switch the operating state of the drive coil. A normally disabled lamp or other illumination device is connected to the drive coil and to the switch by means of a diode. The diode is poled to maintain the lamp disabled while the switch remains unoperated, and to energize the lamp when the switch is operated in response to a detection of yarn breakage.

Abstract: An apparatus for detecting a yarn break on a textile machine having at least one yarn processing position where the transport of a yarn is to be monitored, comprising a triboelectric signal generator located at said processing position for producing a signal indicating the transport of the yarn and a signal detection circuit for amplifying and rectifying the signal to provide an output indicative of a yarn break.

Abstract: In spinning machines, a thread is spun from a roving emerging from a draw frame. When a thread breakage occurs, the roving continues to emerge but its path is deviated by air currents.The presence of the roving on the deviated path is detected and a thread re-attachment process is initiated.An apparatus for practicing the above method includes a light source and light detector for determining the presence of the roving in the appropriate location. An alternative embodiment of the invention provides a mechanical device, e.g. a foraminous gate, to respond to the presence of unspun roving in a suction bypass channel of the spinning machine. In both cases, an actuating signal is produced for initiating the thread re-attachment process.

Abstract: When spinning is to be started or restarted after interruption, an operator places a combination spool support and electronic pack on tracks at the spinning station, locates the pack in spool-supporting position, electrically connects the pack with a spinning station connection, draws a predetermined length of thread from the takeup spool, inserts it into the drawoff tube, and actuates a switch on the pack. The pack contains an electronic timing circuit, which sequentially effects starting of the fiber supply to the spinning chamber, and, after a predetermined time delay, effects reengagement of the thread takeup spool with its drive roller.