US2863276A - Indication of thread breaks in textile machines - Google Patents

Indication of thread breaks in textile machines Download PDF

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Publication number
US2863276A
US2863276A US362331A US36233153A US2863276A US 2863276 A US2863276 A US 2863276A US 362331 A US362331 A US 362331A US 36233153 A US36233153 A US 36233153A US 2863276 A US2863276 A US 2863276A
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Prior art keywords
thread
sieve
break
indication
accordance
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Expired - Lifetime
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US362331A
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English (en)
Inventor
Breuning Ernst
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Pneumafil Corp
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Pneumafil Corp
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Publication date
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
    • D01H13/1625—Electro-mechanical actuators

Definitions

  • Thread breaks have an extremely disturbing effect in a number of textile processes, as for example, in the operation of spinning machines. It must be assured that these machines are immediately shut down when a thread break occurs. If such an immediate shut-down is not effected, a large number of spinning places on the machine will be so disturbed by even a single broken thread that their further operation will be prevented and in addition a substantial loss of material will be caused.
  • a conventional thread suction device is utilized. This may, for example, consist of a pipe through which air is continuously drawn. The suction device will suck in and thus remove the broken thread and thus keep it from fouling the other spinning places. This, however, will not shut down the spinning machine or actuate a positive signal or alarm. The operator of the machine who customarily has to take care of a number of such machines may not notice the break and hundreds of feet of thread may be lost in the suction channel by the time the operator finally notices the thread break and stops the machine.
  • deviations from a prescribed path of travel of the thread are optically indicated by photoelectric cells or electrically indicated by the broken thread closing an electric circuit. This, however, does not prove the practical solution to the problem inasmuch as the devices utilized do not meet the requirements of practical operation and are often effected by dust and unavoidably flying fibers. In addition, these devices are relatively costly in both initial installation and maintenance.
  • a screen sieve is movably arranged in the channel of a thread suction device of a spinning machine and acts as the control element.
  • a thread When a thread is broken it is drawn off by the thread suction device and comes in contact with the screen sieve thus clo ing at least a portion of the opening of the latter and in this way producing an increase in the pressure in the part of the channel located in front of the screen sieve as compared with the pressure in back of the sieve.
  • This increase in pressure may be utilized by means of a manometer through levers and pushrods etc. to stop the spinning machine or for optically or acoustically indicating the thread break.
  • One object of this invention is a device supervising and controlling textile machines by indication of any thread break and possibly by automatically shutting down the textile machine upon the occurrence of such a thread break.
  • a further object of this invention is an improved construction for a device utilizing a screen sieve in the channel of a thread suction device of a spinning machine for supervising and controlling the machine which avoids all the disadvantages previously encountered.
  • Fig. 1 diagrammatically shows a cross section of an embodiment of a device in accordance with the invention.
  • Fig. 2 shows a front elevation of an embodiment of a thread sieve in accordance with the invention.
  • a thread sieve is movably positioned in the pipeline of a thread suction system.
  • the thread sieve in accordance with the invention is developed in the form of a rake having a number of parallel, spaced-apart member such as parallel bars, pipes, rails or the like, the ends of which are free.
  • the "thread sieve in accordance with the invention may be utilized in the conventional manner in which the broken thread or sliver or parts thereof increasingly closes the openings of the sieve thus bringing about a pressure differential on each side of the sieve and a drop of the air pressure behind the sieve which may be utilized by known means, as for example, a manometer to indicate the break of the thread or sliver and/or to stop the textile machine.
  • the thread sieve is pivotally mounted within the pipeline so that when, in its rest position, it partially closes the pipeline and is pivoted upward out of its closed position by the impact against it by the broken thread or sliver or parts thereof.
  • This pivoting out of the closed position by impact i utilized in accordance with the invention to actuate a mechanical and/or electrical relay which in turn, by known means, gives an indication of the break or sliver and/or stops the textile machine.
  • the individual fibers are periodically cleaned preferably automatically from the thread sieve at time intervals which are greater than the longest interval of time which is required for the closing of the passage of the thread sieve by a broken thread, etc.
  • This may be effected by means which periodically swing the thread sieve out of its closed position and allows the suction air to clean the same While, at the same time, disconnecting the actuation mechanism which gives an indication of the break of thread or sliver and/ or stops the textile machine,
  • the pipe section 1 of a thread suction system is provided with a bend at the place 2. Atthis place, there is arranged the thread sieve 3 which is developed as a hinge movable around the pin 5.
  • the baffie plate 4 is provided to divert the drawn-01f air and thus keep the '1 pin 5 clean.
  • the thread sieve 3, developed as a rake consists of the fastening member 7 and the parallel bars 6 which, in accordance with the present invention, taper down to their free ends. In the closed position of the thread sieve 3, the ends of the bars 6 rest on the bead 8 of the wall of pipe section 1 of the thread suction system.
  • the electromagnet 9 serves to hold the thread sieve 3, consisting of magnetic material, as for example, iron 'against the wall of pipe section 1.
  • a resilient contact 10 On the fastening member 7 of the thread sieve 3, there is arranged a resilient contact 10.
  • a mating contact 11 is provided in the tube section 1. Both of these contacts, in accordance with the present embodiment, are arranged in the circuit of an electric relay which, in its turn, signals the thread or sliver break and/ or stops the textile machine.
  • the attraction force of the electromagnet 9 which holds the thread sieve in closed position is so adjusted, for example, by regulating the excitation current, that this attraction force is only overcome after, due to the increasing closure of the passage openings of the thread sieve 3, there takes place in the pipeline of the thread suction system a pressure drop which is utilized in the known manner manometrically to signal the thread break or to stop the textile machine.
  • the attraction force exerted by the electromagnet 9 and which holds the thread sieve in the closed position is adjusted in such a manner that this pulling force is overcome by the impact caused by the thread which has been drawn in as a result of the break of a thread.
  • the thread sieve acts manometrically as control element in the known manner, while in the second case its action is characterized by the fact that it is immediately brought out of its closed position when hit by a broken thread, due to the fact that the contacts 10 and 11 touch each other and in this way the relay circuit effecting the signal or stopping of the textile machine is closed.
  • a further improvement in accordance with the present invention is, furthermore, obtained by having the thread sieve so dimensioned, as for example, by imparting it a suitable shape or by determining its weight with reference to the suction force of the thread suction system that the bars or the like do not form any angle with the axis of the suction air fiow when they are in the open position, or at least only form a small angle with said axis.
  • an interrupter for the excitation current of the electromagnet 9 which interrupts this current for a short period of time at preferably periodic time intervals and at the same time, the actuation of the switching devices resulting in the thread break signal and/or the stopping of the textile machine is prevented by known switch elements.
  • the interrupter may be of any known conventional construction.
  • supervision means will be used to generically designate any of the known means for signalling and/ or stopping the textile machine when actuated either electrically or mechanicallly etc.
  • a thread sieve positioned in the i eline of a thread suction arrangement
  • said thread sieve comprising a rake having a multiple number of substantially parallel, freeended bar members movably mounted in said pipeline for movement between a closed position with said bar members extending substantially across the entire cross section of said pipeline and an open position with said bar members extending substantially in the direction of the flow axis of said pipeline said rake having at least a portion thereof of magnetic material and an electromagnet positioned for the magnetic attraction of said magnetic material to maintain said rake in said closed position with a predetermined force.
  • Improvement according to claim 1 including means for actuating supervision means for the textile machinery upon movement of said rake from said closed position toward said open position.
  • said means for actuation of the supervision means includes a movable electric contact connected to said rake and a fixed electric contact positioned for contact with said movable electric contact upon movement of said rake from said closed position toward said open position.
  • Improvement according to claim 1 including means for actuating supervision means for the textile machinery upon an increase in the drop of air pressure in said pipeline behind said rake.
  • Improvement according to claim 1 including means for periodically de-energizing said electromagnet to allow said rake to move from said closed position to said open position for the automatic cleaning thereof.
  • Improvement according to claim 1 including means for deenergizing said electromagnet upon actuation of supervision means for the textile machinery.
  • Improvement according to claim 1 including means for deenergizing said electromagnet by breaking the circuit thereof upon movement of said rake from said closed toward said open position.
  • Improvement to claim 1 including means for periodically re-energizing said electromagnet and simultanerake is of magnetic material and in which said electro-,
  • magnet is positioned for attraction of the free ends of said bar members in the closed position of said rake.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US362331A 1952-06-19 1953-06-17 Indication of thread breaks in textile machines Expired - Lifetime US2863276A (en)

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Application Number Priority Date Filing Date Title
DE2863276X 1952-06-19

Publications (1)

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US2863276A true US2863276A (en) 1958-12-09

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US362331A Expired - Lifetime US2863276A (en) 1952-06-19 1953-06-17 Indication of thread breaks in textile machines

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US (1) US2863276A (ko)
NL (1) NL85337C (ko)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956392A (en) * 1958-03-04 1960-10-18 Ohnishi Hiromu Break detection apparatus
US3373551A (en) * 1965-05-08 1968-03-19 Gillono Matteo Automatic apparatus for binding broken yarns on spinning machines
DE1286436B (de) * 1966-04-05 1969-01-02 Rieter Ag Maschf Vorrichtung zum Abscheiden von aufgeloesten Faserflocken aus einem Transportluftstrom
US3938119A (en) * 1974-06-20 1976-02-10 Siegfried Peyer Electro-mechanical thread supervisory apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1042394A (en) * 1911-01-24 1912-10-29 Empire Duplex Gin Company Apparatus for treating lint.
US1056260A (en) * 1911-01-24 1913-03-18 Empire Duplex Gin Company Apparatus for treating lint.
US2500343A (en) * 1946-04-23 1950-03-14 Le Blan & Cie Soc Stop mechanism for fly frames

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1042394A (en) * 1911-01-24 1912-10-29 Empire Duplex Gin Company Apparatus for treating lint.
US1056260A (en) * 1911-01-24 1913-03-18 Empire Duplex Gin Company Apparatus for treating lint.
US2500343A (en) * 1946-04-23 1950-03-14 Le Blan & Cie Soc Stop mechanism for fly frames

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956392A (en) * 1958-03-04 1960-10-18 Ohnishi Hiromu Break detection apparatus
US3373551A (en) * 1965-05-08 1968-03-19 Gillono Matteo Automatic apparatus for binding broken yarns on spinning machines
DE1286436B (de) * 1966-04-05 1969-01-02 Rieter Ag Maschf Vorrichtung zum Abscheiden von aufgeloesten Faserflocken aus einem Transportluftstrom
US3938119A (en) * 1974-06-20 1976-02-10 Siegfried Peyer Electro-mechanical thread supervisory apparatus

Also Published As

Publication number Publication date
NL85337C (ko)

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