US3764773A - Device for stopping a yarnworking machine in response to thread tension - Google Patents

Device for stopping a yarnworking machine in response to thread tension Download PDF

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Publication number
US3764773A
US3764773A US00234479A US3764773DA US3764773A US 3764773 A US3764773 A US 3764773A US 00234479 A US00234479 A US 00234479A US 3764773D A US3764773D A US 3764773DA US 3764773 A US3764773 A US 3764773A
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United States
Prior art keywords
yarn
force
machine
thread
carrying member
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Expired - Lifetime
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US00234479A
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English (en)
Inventor
E Merkle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BLEYLE KG WILHELM
WILH BLEYLE KG DT
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BLEYLE KG WILHELM
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Priority claimed from DE19712115274 external-priority patent/DE2115274C3/de
Application filed by BLEYLE KG WILHELM filed Critical BLEYLE KG WILHELM
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40—Applications of tension indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • ABSTRACT A process and device for stopping a yarnworking machine is disclosed.
  • the device comprises a thread holder which is maintained in operative position by holding means of predetermined force; switching means electrically coupled to the holding means such that thread being processed through the machine is conducted through the thread holder and maintained at a predetermined tension; the switching means being operative at the predetermined tension to maintain the yarnworking machine in operation.
  • thread tension which is too high will break the thread, and if operation is continued the product will be unusable. Even if the thread withstands the excessive tension, the quality of the product will be unsatisfactory.
  • control means known in the trade as thread monitors are used, which will stop the yarnworking machine both in case of thread failure and if the maximum allowable thread tension is exceeded.
  • a force derived from the thread tension is used to load or complete the loading of a reservoir in the form of a spring arrangement, and the criterion for the excess over maximum allowable thread tension that will trigger the stopping of the machine is determined by loading of the accumulator.
  • the maximum allowable thread tension is determined by a pull generating an effect of adhesion between two bodies in contact with each other without mechanical connection and diminishing with the distance between the, for example, the pull of a magnetic field.
  • the device for practicing the method according to the invention comprises a magnet, the pull of which keeps a thread holder, for example, a switch lever, in a neutral position permitting the machine to run, against a force acting upon it, derived from the thread tension and varying proportionally with it, and releases it to switch of its own accord into a position, stopping the machine as soon as the said force overcomes the pull of the magnet because the maximum allowable thread tension has been exceeded.
  • a thread holder for example, a switch lever
  • the drawing shows several embodiments of the device for practicing the method of the invention by way of example, the function of which device is to monitor the thread tension and stop the machine, not shown, when the thread tension is too high or too low.
  • FIG. la illustrates schematically the normal operating position of a device according to the invention in -which the thread holder is a pivoted switch lever and the force to be compared with the thread tension emanates from the field of an electromagnet.
  • FIG. 1b illustrates the embodiment in accordance with FIG. 1a in a non-operative position, after the yarn has broken.
  • FIG. 10 illustrates the embodiment of FIG. la in a non-operative position, when the tension of the yarn has exeeded a predetermined value.
  • FIG. 2 illustrates a modification of the switch lever of FIG. la in which an air suction device provides the comparison force generated by the electromagnet of FIG. 1a.
  • FIG. 3a is a modification of the device of FIG. 1a in which the switch lever and thread holder is slidable along a rod and is illustrated in a normal operation position.
  • FIG. 3b illustrates the embodiment of FIG. 3a in a non-operative position, after the yarn has broken.
  • FIG. 30 illustrates the embodiment of FIG. 3a in a non-operative position when the tension in the yarn has exceeded a predetermined value.
  • FIGS. 1a through 1c The device of FIGS. 1a through 1c has a member 2 attached to a suitable part of the frame of the machine, to which member a lever 3 is linked so as to be able to swing in the plane of the drawing.
  • This lever has a forked head whose prongs 5 have lateral holes in line with each other for passage of the thread 1.
  • the thread coming off the spool, passes over a boss on the head of the lever 3 and through the holes either by way of a conventional feeder or directly to the thread guide at the point of operation in question.
  • the feeler 6 is carried by the segment of thread, taut during operation, traversing the space in the forked head 5 of the lever 3 in such position that, as shown in FIG.
  • FIG. 1a contact ml which in the normal operative position is open, and which, when closed, provides current to the field magnet of the clutch mechanism 7, which serves to disengage the driving motor for driving the yarnworking machine from the same, see FIGS. 1b and 1:: for the conditions when the tension applied to the yarn has exceeded a predetermined force or is broken.
  • FIG. la the yarnworking machine is in its operating position with microswitch-m1 in an open position and microswitch m2 in a closed position and the force being generated by electromagnet 4 is controlled by regulator or control means while clutch 7 is in a non-operative position which permits the yarnworking machine to continue operation.
  • the electromagnet 4 arranged under the member 2 receives direct current from the output of bridge rectifier G to generate the magnetic field, whose strength is continuously variable by means of the regulator 10.
  • the winding of relay 7 in working position closes the circuit of an electromagnet, not shown, which releases the clutch between the yarnworking machine and its power source.
  • the taut thread loads the lever 3 with a counterclockwise torque, while the electromagnet 4 holds it fixed in the neutral position shown so long as the torque acting on lever 3 in the opposite direction emanating from the thread tension is weaker or at all events no stronger than that exerted on lever 3 by the field of the electromagnet 4.
  • a second microswitch m2 is required, which switches off the energizing current for the electromagnet when the feeler 6 moves down as illustrated in FIG. 1b.
  • Such movement of the feeler 6 independently of that of the lever 3 is possible because the feeler, unhindered by the segment of thread, now slack, that supported it, can drop into a groove located beneath the space between the fork prongs 5.
  • the swing of lever 3 owing to disconnection of the energizing current for the winding of electromagnet 4, which takes place only after the feeler has already responded, has no effect on the functioning of the device according to the invention.
  • FIG. 2 The embodiment of the device according to the invention as shown in FIG. 2 is connected by a suction line at 13 to a source of air suction not shown.
  • the outgoing mouth of line 12 is surrounded by a sealing surface 11 fitting snuggly on the sealing surface 14 of lever 3" when in the position of the drawing, in which it is held by the suction prevailing in line 12.
  • the head, not shown, of lever 3" is similar to that of lever-3 in FIG. 1a.
  • a member corresponding to the feeler 6 in FIG. la and likewise not shown actuates only one microswitch, having the functions of the one designated ml in FIG. 1a (stopping the machine at unduly high thread tensions).
  • the valve 15 (FIG. 2) serves much the same purpose as the microswitch m2 in FIG.
  • FIGS. 3a through 3c differs from that of FIGS. la through 1c in the form of thread holder
  • Whether it will reach the stop depends on what length of yarn the machine will work from the time of disengagement of its power until its stops. If the maximum path of member 18 from neutral position to stop 22 is one meter, then another two meters of thread can be worked in that length of time. This length is sufficient even if the yarnworking machine is equipped with socalled spool frames. Such is the advantage of this design of the device according to the invention.
  • the member 18 In case of thread failure as illustrated in FIG. 3b, the member 18 remains in neutral position, but feeler 6, held by a light spring, not shown, against the segment of thread spanning the opening 19, enters the opening, taking the slackened segment of thread with it, and switches microswitches ml and m2 just as when the member 18 is shifted out of neutral position, where the segment of thread stretched over opening 19 gave way to the end of feeler 6 in contact with it.
  • Apparatus for stopping a yarnworking machine when the thread tension in the yarn exceeds a predetermined value or when the yarn breaks comprising:
  • a thread holder assembly including a movable yarn carrying member for guiding said yarn in a predetermined path when in a first position, said member being movable to a second position in response to a force exerted thereon by the thread tension;
  • force generating means associated with the thread holder assembly for exerting a predetermined force on the yarn carrying member, said force being opposite the force exerted by the thread tension and sufficient to hold the yarn carrying member in the first position against the force exerted by the predetermined thread tension;
  • switch means operatively connected to the yarnworking machine and the force generating means and responsive to the presence of yarn in the predetermined path for maintaining the machine in an operating condition and for energizing said force generating means, so that the switch means is responsive to the absence of yarn in the predetermined path and the machine is stopped when the yarn breaks or the thread tension exceeds the predetermined value causing the force of the force generating means to be overcome and the yarn carrying member to move to the second position.
  • An apparatus for stopping a yarnworking machine when the thread tension in the yarn exceeds a predetermined value or when the yarn breaks comprising:
  • a thread holder assembly including a movably yarn carrying member for guiding said yarn in a predetermined path when in a first position, said member being movable to a second position in response to a force exerted thereon by the thread tension;
  • suction means constructed and arranged with the thread holder assembly for exerting a predetermined force on the yarn carrying member, the direction of said force being opposite to the force exerted by the thread tension and sufficient to hold the yarn carrying member in the first position against the force exerted by the predetermined thread tension;
  • switch means operatively connected to the yarnworking machine and the force generating means and being responsive to the presence of yarn in the predetermined path for maintaining the machine in an operating condition and for energizing said force generating means, so that the switch means is responsive to the absence of yarn in the predetermined path and the machine is stopped when the yarn breaks or the thread tension exceeds the predetermined value causing the force maintained by the force generating means to be overcome and the yarn carrying member to move to the second position.
  • An apparatus for stopping a yarnworking machine, if the thread tension in the yarn exceeds a predetermined value or if the yarn breaks, comprising:
  • a thread holder assembly including a movable yarn carrying member for carrying the yarn along a predetermined path;
  • an electromagnet means constructed and arranged with the thread holder assembly for exerting a predetermined force on the yarn carrying member, the direction of said force being opposite to the force exerted by the thread tension and sufficient to hold the yarn carrying member in a first position against the force exerted by the predetermined thread tension;
  • switch means including a feeler which feels the position of the yarn on the yarn carrying member whereby when the position of the yarn is changed along the predetermined path the switch operates from its first position to a second position to stop the machine.
  • the yarn carrying member includes a recess over which the yarn is passed and in which said feeler rests on the yarn to determine the position of the yarn as it is moving along said predetermined path.

Landscapes

  • Knitting Machines (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Sewing Machines And Sewing (AREA)
US00234479A 1971-03-30 1972-03-14 Device for stopping a yarnworking machine in response to thread tension Expired - Lifetime US3764773A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712115274 DE2115274C3 (de) 1971-03-30 Fadenüberwachungsvorrichtung

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US3764773A true US3764773A (en) 1973-10-09

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US (1) US3764773A (it)
AT (1) AT337337B (it)
CH (1) CH554287A (it)
FR (1) FR2131327A5 (it)
GB (1) GB1361875A (it)
IT (1) IT951671B (it)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938119A (en) * 1974-06-20 1976-02-10 Siegfried Peyer Electro-mechanical thread supervisory apparatus
US3994245A (en) * 1976-04-15 1976-11-30 The Singer Company Tight end circuitry II
US4016732A (en) * 1974-08-07 1977-04-12 Wilh. Bleyle Kg Filament monitoring device
US4078505A (en) * 1976-04-01 1978-03-14 Spencer Wright Industries, Inc. High tension detectors for multi yarn machinery
US4091606A (en) * 1976-08-16 1978-05-30 Fritz Stahlecker Open end spinning frame with a magnetic switch for sliver feed
US4338773A (en) * 1978-12-23 1982-07-13 Schubert & Salzer Control mechanism for a fiber feed device on an open end spinning mechanism
US5005503A (en) * 1989-12-12 1991-04-09 Peerless Carpet Corporation Broken yarn detector for multiple yarn manipulating machines
US5187929A (en) * 1989-04-21 1993-02-23 Savio S.P.A. Automatic device for resetting a mechanical yarn feeler in a textile machine
US20160168763A1 (en) * 2013-07-22 2016-06-16 Murata Machinery, Ltd. Yarn manufacturing device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354627A (en) * 1964-05-19 1967-11-28 Vyzk Ustav Bavlnarsky Yarn control apparatus
US3612791A (en) * 1970-01-13 1971-10-12 Northrop Carolina Inc Yarn tension and break detector apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354627A (en) * 1964-05-19 1967-11-28 Vyzk Ustav Bavlnarsky Yarn control apparatus
US3612791A (en) * 1970-01-13 1971-10-12 Northrop Carolina Inc Yarn tension and break detector apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Western Electric Technical Digest, E. C. Gajewski et al., Yarn Break Detector, 1 1966, p. 37. *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938119A (en) * 1974-06-20 1976-02-10 Siegfried Peyer Electro-mechanical thread supervisory apparatus
US4016732A (en) * 1974-08-07 1977-04-12 Wilh. Bleyle Kg Filament monitoring device
US4078505A (en) * 1976-04-01 1978-03-14 Spencer Wright Industries, Inc. High tension detectors for multi yarn machinery
US3994245A (en) * 1976-04-15 1976-11-30 The Singer Company Tight end circuitry II
US4091606A (en) * 1976-08-16 1978-05-30 Fritz Stahlecker Open end spinning frame with a magnetic switch for sliver feed
US4338773A (en) * 1978-12-23 1982-07-13 Schubert & Salzer Control mechanism for a fiber feed device on an open end spinning mechanism
US5187929A (en) * 1989-04-21 1993-02-23 Savio S.P.A. Automatic device for resetting a mechanical yarn feeler in a textile machine
US5005503A (en) * 1989-12-12 1991-04-09 Peerless Carpet Corporation Broken yarn detector for multiple yarn manipulating machines
US20160168763A1 (en) * 2013-07-22 2016-06-16 Murata Machinery, Ltd. Yarn manufacturing device
US10179959B2 (en) * 2013-07-22 2019-01-15 Murata Machinery, Ltd. Yarn manufacturing device

Also Published As

Publication number Publication date
GB1361875A (en) 1974-07-30
IT951671B (it) 1973-07-10
DE2115274B2 (de) 1976-06-24
CH554287A (de) 1974-09-30
DE2115274A1 (de) 1972-10-19
FR2131327A5 (it) 1972-11-10
ATA732571A (de) 1976-10-15
AT337337B (de) 1977-06-27

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