Electrical Patents (Class 66/163)
  • Patent number: 8340805
    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.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: December 25, 2012
    Assignee: L.G.L. Electronics S.p.A.
    Inventors: Pietro Zenoni, Giovanni Pedrini, Luca Gotti
  • Patent number: 8117871
    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into a fiber take-up position, while at the same time previously formed stitches are being knocked over, and being withdrawn again after the fiber material (6) is inserted.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 According to the invention, when the error signal occurs, the knitting elements (3) are withdrawn from an intermediate position again without the previously formed stitches being knocked over and without the fiber material being taken up.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: February 21, 2012
    Assignee: SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH
    Inventors: Wolfgang Bauer, Axel Flad, Christine Abt-Seitel
  • Publication number: 20120031148
    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.
    Type: Application
    Filed: June 20, 2011
    Publication date: February 9, 2012
    Inventors: Pietro Zenoni, Giovanni Pedrini, Luca Gotti
  • Publication number: 20110113831
    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.
    Type: Application
    Filed: August 1, 2008
    Publication date: May 19, 2011
    Inventors: Wolfgang Bauer, Axel Flad, Christine Abt-Seitel
  • Publication number: 20090260402
    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.
    Type: Application
    Filed: April 8, 2009
    Publication date: October 22, 2009
    Applicant: ELTEX OF SWEDEN AB
    Inventors: Brian Hicks, Jonas Hansson, Johan Ostman
  • Publication number: 20040216498
    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.
    Type: Application
    Filed: June 14, 2004
    Publication date: November 4, 2004
    Inventors: Birger Johansson, Henrik Svensson
  • Patent number: 6470713
    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.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: October 29, 2002
    Assignee: Iropa AG
    Inventor: Stefano Lamprillo
  • Patent number: 6257284
    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.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: July 10, 2001
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventor: Rainer Schuster
  • Patent number: 5894744
    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.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: April 20, 1999
    Inventor: Heinrich Fabschitz
  • Patent number: 5575313
    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.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: November 19, 1996
    Assignee: Sulzer Rueti AG
    Inventors: Thomas Weber, Dietmar Markward, Jaques Peulen
  • Patent number: 5323625
    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.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: June 28, 1994
    Inventor: Angelo Paggiaro
  • Patent number: 5307283
    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.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: April 26, 1994
    Assignee: Precision Fukuhara Works, Ltd.
    Inventors: Masatoshi Sawazaki, Takao Shibata
  • Patent number: 5225988
    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.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: July 6, 1993
    Inventor: Tiziano Barea
  • Patent number: 5207763
    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.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: May 4, 1993
    Assignee: International Trading S.r.L.
    Inventor: Kurt A. G. Jacobsson
  • Patent number: 5136499
    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.
    Type: Grant
    Filed: June 18, 1991
    Date of Patent: August 4, 1992
    Inventor: Sten A. O. Rydborn
  • Patent number: 5055829
    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.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: October 8, 1991
    Assignee: Barmag AG
    Inventors: Manfred Stuttem, Ludger A. Deters
  • Patent number: 5017911
    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.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: May 21, 1991
    Assignee: Barmag AG
    Inventors: Manfred Muller, Bernd Neumann, Manfred Stuttem
  • Patent number: 5005503
    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.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: April 9, 1991
    Assignee: Peerless Carpet Corporation
    Inventors: Alain Trahan, Paul-Andre Grondin, Luc Bilodeau
  • Patent number: 4984896
    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.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: January 15, 1991
    Assignee: Protechna Herbst GmbH & Co. K.G.
    Inventor: Peter Flamig
  • Patent number: 4898337
    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.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: February 6, 1990
    Assignee: Sipra Patententwicklungs-Und Beteiligungsgesellschaft
    Inventors: Heinz Brunner, Karl-Jurgen Sauter
  • Patent number: 4882916
    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.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: November 28, 1989
    Inventor: Robert E. Jones
  • Patent number: 4881062
    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.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: November 14, 1989
    Assignee: Nippon Selen Co., Ltd.
    Inventors: Syozaburo Makino, Shouji Hirabayashi
  • Patent number: 4860558
    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.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: August 29, 1989
    Assignee: Aktiebolaget IRO
    Inventor: Kurt A. G. Jacobsson
  • Patent number: 4841748
    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.
    Type: Grant
    Filed: August 3, 1988
    Date of Patent: June 27, 1989
    Assignee: Watanabe Kutsushita Kogyo Co., Ltd.
    Inventors: Fumio Watanabe, Toshio Watanabe, Chiharu Watanabe, Yuji Watanabe, Yoshinori Watanabe
  • Patent number: 4817678
    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.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: April 4, 1989
    Assignee: Picanol N.V.
    Inventor: Stefan Dewaele
  • Patent number: 4814633
    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).
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: March 21, 1989
    Inventor: Lars H. G. Tholander
  • Patent number: 4791967
    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.
    Type: Grant
    Filed: February 13, 1987
    Date of Patent: December 20, 1988
    Assignee: Picanol N.V.
    Inventors: Michel Vandeweghe, Dirk Gryson
  • Patent number: 4790153
    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.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: December 13, 1988
    Assignee: H. Stoll GmbH & Co.
    Inventors: Jurgen Ploppa, Gerd Mak
  • Patent number: 4754616
    Abstract: The take up means (5) is inhibited in response to a predetermined operating conditions of the flat knitting machine.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: July 5, 1988
    Assignee: Aktiebolaget IRO
    Inventor: Kurt A. G. Jacobsson
  • Patent number: 4744227
    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.
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: May 17, 1988
    Inventors: Charles G. Whitener, Jr., Gary Hibbard
  • Patent number: 4727732
    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.
    Type: Grant
    Filed: February 13, 1987
    Date of Patent: March 1, 1988
    Inventors: Pierre G. Campin, Jean P. Dumas, Michel Gre, Alain Legay, Andre Langlet, Yvon Madec
  • Patent number: 4720702
    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.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: January 19, 1988
    Assignee: Barmag AG
    Inventor: Gerhard Martens
  • Patent number: 4713655
    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.
    Type: Grant
    Filed: June 18, 1985
    Date of Patent: December 15, 1987
    Assignee: Rieter Machine Works, Ltd.
    Inventors: Hans-Jorg Sommer, Heinz Mutter, Armin Wirz, Felix Graf
  • Patent number: 4710646
    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.
    Type: Grant
    Filed: April 3, 1986
    Date of Patent: December 1, 1987
    Assignee: Elitex koncern textilniho strojirenstvi
    Inventors: Otakar Curda, Jaroslav Maxa, Pavel Uhlir
  • Patent number: 4676443
    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.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: June 30, 1987
    Inventor: Mark H. Simmons
  • Patent number: 4628710
    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.
    Type: Grant
    Filed: December 4, 1984
    Date of Patent: December 16, 1986
    Assignee: Aktiebolaget IRO
    Inventor: Kurt A. G. Jacobsson
  • Patent number: 4607507
    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.
    Type: Grant
    Filed: December 27, 1985
    Date of Patent: August 26, 1986
    Assignee: Aktiebolaget IRO
    Inventor: Kurt A. G. Jacobsson
  • Patent number: 4607506
    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.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: August 26, 1986
    Assignee: Aktiebolaget IRO
    Inventor: Kurt A. G. Jacobsson
  • Patent number: 4574846
    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.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: March 11, 1986
    Inventor: Franz X. Huemer
  • Patent number: 4574353
    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.
    Type: Grant
    Filed: June 29, 1983
    Date of Patent: March 4, 1986
    Assignee: Aktiebolaget IRO
    Inventors: Jerker Hellstrom, Lars H. G. Tholander, Kurt A. G. Jacobsson
  • Patent number: 4571582
    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.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: February 18, 1986
    Assignee: Erwin Sick GmbH Optik-Elektronik
    Inventor: Arthur Walter
  • Patent number: 4551591
    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.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: November 5, 1985
    Inventor: Robert E. Jones
  • Patent number: 4549413
    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.
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: October 29, 1985
    Assignee: Protechna Herbst GmbH & Co. KG
    Inventor: Peter Flamig
  • Patent number: 4525705
    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.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: June 25, 1985
    Assignees: Centre Technique Industriel Dit: Insttiut Textile de France, Establissement Public Dit: Agence Nationale de Valorisation de la Recherche (Anvar)
    Inventors: Jacques Edme, Etienne Deffontaine
  • Patent number: 4522236
    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.
    Type: Grant
    Filed: March 15, 1983
    Date of Patent: June 11, 1985
    Assignee: Lindauer Dornier Gesellschaft mbH
    Inventor: Heinz P. Lohr
  • Patent number: 4505135
    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.
    Type: Grant
    Filed: June 7, 1983
    Date of Patent: March 19, 1985
    Assignee: Atelier de construction Steiger S.A.
    Inventors: Pierre L. Christinat, Louis Frund
  • Patent number: 4491831
    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.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: January 1, 1985
    Assignee: Murata Kikai Kabushiki Kaisha
    Inventors: Shojo Sakai, Hisaaki Kato, Yoshihiko Samoto, Kenichi Inada
  • Patent number: 4462433
    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.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: July 31, 1984
    Assignee: Grob & Co. Aktiengesellschaft
    Inventor: Martin Graf
  • Patent number: 4455549
    Abstract: A device for indicating the triggering of a signal transducer in, for example, thread surveillance and monitoring systems.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: June 19, 1984
    Inventor: Sten A. Rydborn
  • Patent number: 4444132
    Abstract: Yarn breakage stop motion device for textile machines, in particular for tufting machines, having a number of plates corresponding to the number of yarns to be monitored, utilize plates equipped on both ends with an eye each. One eye serves to guide a yarn to be monitored and the other eye supports the plate on a carrier axle. All plates together form in their entirety a register. A photocell acting on the drive mechanism of the textile machine is arranged such that the pivoting of one or more plates will be detected by the photocell. A plurality of spacer rings are held clampingly against each other on the carrier axle, with each of the spacer rings having on one side an annular shoulder surrounding the carrier axle and the eye serving to support the plate being provided with an aperture, so that the diameter of the eye corresponds to the external diameter of the annular shoulder and the width of the eye aperture to the diameter of the internal opening of the spacer ring or the diameter of the carrier axle.
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: April 24, 1984
    Assignee: Dura Tufting GmbH
    Inventor: Alfred Breitenbach