US1956486A - Stop mechanism for looms - Google Patents

Stop mechanism for looms Download PDF

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Publication number
US1956486A
US1956486A US406473A US40647329A US1956486A US 1956486 A US1956486 A US 1956486A US 406473 A US406473 A US 406473A US 40647329 A US40647329 A US 40647329A US 1956486 A US1956486 A US 1956486A
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Prior art keywords
thread
loom
movement
wire
pile
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Expired - Lifetime
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US406473A
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English (en)
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Breitschadel Franz
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Individual
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Individual
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D39/00—Pile-fabric looms
    • D03D39/02—Axminster looms, i.e. wherein pile tufts are inserted during weaving

Definitions

  • This invention relates to looms as for weaving and tying carpets and the like, in particular to improvements such as will reduce defects in the work generally caused when by accident a number of tufts, that is, the number of stitches or naps are dropped by the machine.
  • the well-known Jacquard loom has an array of weaving units or mechanisms, each of which takes care of its carpet zone and includes a thread-holder or socalled color setter to carry a number of differently colored threads or tuft yarns to be drawn out in the direction of weft by certain gripping members for the purpose of forming the pile of the carpet.
  • the invention reduces the number of dropped tufts to a minimum by means of a guard device or relay mechanism effective to stop the loom automatically whenever a thread fails, and to draw the operators attention immediately to the source of trouble.
  • a movable feeler or contact member communicates with the advancing portion of the thread. As soon as this working portion of the thread fails, that is to say, when a tuft or a series of tufts are about to be omitted, the feeler will cause an electric contact to stop the machine, while a preferred alarm or signal may enable the operator to immediately locate the source of trouble.
  • a novel guard device is designed to take care of this function.
  • Fig. 1 shows a diagrammatic illustration of the tying loom in front elevation, the tying members extending over the whole width of the loom being only partly shown.
  • Fig. 2 shows a perspective view of the guard device in position during the normal operation of the loom
  • Fig. 3 shows a perspective View of the guard device in lowered position during normal oper- V ation of the loom.
  • Fig. 4 shows a perspective View of the guard device on the occurrence of a disturbance caused by the omission of the pile thread to be advanced.
  • Fig. 5 shows the device for disengaging the loom P in the disengaging position.
  • each color setter 4 there operate 80 shears 5, 6 which in the known manner carry out an up and down rocking movement and also a cutting movement in that the movable shear 6 is so moved around the shear axis 9 that the shears cut off the pile thread 8 advanced by the thread feeding clamp 7, '7 a few millimeters in front of the color setter 4.
  • a controlling member which guards the advance of the pile thread 8, the thread guard being preferably located on the movable shear 6.
  • the guard device consists substantially of a movable rod 10 which at its lower end terminates in a transversely disposed foot 11 which, during the normal operation of the loom rests loosely on the corresponding advanced pile thread 8.
  • the rod 10 is held by a bent plate 12, rigidly connected to the movable shear 6 by bolts passing through the holes 13, 14, and guided vertically by bent lugs 15, 16 provided at the upper and lower ends of the plate 12.
  • the guide plate 12 is provided with a cranked arm 17 having a guide slot 18 in which a guide pin 19, rigidly connected to the rods 10 of the guard device, can reciprocate vertically.
  • a pair of grip- Ping jaws 3'7 are provided which are advanced to grip the thread in front of the shears as soon as it is drawn out. These jaws support the thread after it has been cut and thus prevent the dropping of the movable rod 10 provided a thread has been drawn out, permitting this rod to drop only on the occasion of a failure of the thread.
  • two pairs of these jaws are preferably provided in the manner shown in the patent to Banyai, No. 1,752,140, these jaws serving in the usual manner to carry the thread over to the knotting mechanism.
  • the rod 10 is cranked in a suitable manner a number of times, as shown for example in Figs. 2 and 3, so as to terminate in an angular arm 20 of which the front end is formed into an eye 21 open on the inside.
  • the arm 20 together with the upper end of the rod forms an inwardly open angle through which passes a wire 22.
  • the latter is tensioned transversely across the loom frame 1, 1 and electrically insulated from the frame 1.
  • the position of the transverse wire 22 relative to the angular arm 20 is so selected that the wire 22, during the normal operation of the loom, cannot come into contact with any part of the guard device provided on each of the tying members, as the rod foot 11 rests either on the thread advanced by the thread withdrawing clamps '7, '7 so that the light rod 10, 2-0, 21 is supported by the pile thread 8 (see Fig. 2) or the arm 20 is prevented from coming into contact with the wire 22 by the upward swinging movement of the shears.
  • the magnet 28 actuates by reason of its magnetic force, when the circuit is closed, a small bell crank lever 24 which may be provided at the forward end of the disengaging device 31 located on the 100m in the usual manner.
  • the transverse rod 33 serving to disengage the loom by hand may be used to return the lever 24 into its normal position shown in Fig. 1.
  • the transverse rod 33 is connected to the upper limb of the lever 24 by a cord 34.
  • any other device may be used for automatically stopping the looms through the medium of the guard device, and which is moved by the magnet 28 directly or by means of mechanism connected thereto, into the path of the rocking disengaging lever 32 in order to stop the latter.
  • the method of operation of the switch 26 is only for the purpose of preventing the bell 23 from ringing continuously as a periodically repeated bell signal is more effective.
  • the switch 26 is shown to be mounted on the shaft 3 but it may be provided on any other rocking or rotating shaft of the loom. 109
  • the shears are mounted on rocker arms carried by the rock shaft 3. After a thread is out, the shears are raised back to the position shown in Fig. 2, in which the 2 extension 19 rests in the bottom of the slot 18 q and thereby prevents dropping of the rod 10. In this position, the thread previously drawn out is released and the jaws 7 grip and draw out another thread. W hen this second thread has been 12?; drawn out, the shears are lowered to the posi tion shown in Fig. 3. In this position, unless the thread has failed, the rod 10 will be supported by the thread. There is therefore no danger of stopping the loom unless a thread Mg fails.
  • a loom for the production of carpets and the like having a threadholder, a threadfeeder to advance the thread step by step from the holder to form the pile of the carpet, and cutting means between said holder and feeder to sever the advanced portion of the thread, that improvement which consists in a feeler normally urged to movement in one direction movably mounted upon said cutting means engaging the thread and held against movement thereby, and means controlled by movement of said feeler, when a thread fails to stop the loom, and to indicate the failure of the thread.
  • a loom for the production of carpets or the like having a plurality of weaving units, each of said units including means to form a carpet zone by step-by-step feeding of an individual thread to form thepile of the carpet, and sets of shears to sever the advanced thread, one or" the shears of each set being movable, that improvement which consists of a guard device to indicate failure of a thread, including individual contact 'members one in each unit normally urged to movement movably mounted on the movable shears engaging the thread of the corresponding unit and held against movement thereby, a common stationary contact --ember comprising a wire stretched across the loom in the path of movement of the individual contact members, each of said individual contact members having a curved portion partially surrounding the wire and normally held away from the wire but adapted to engage the same, when a thread breaks, to close an electric circuit.
  • each of said units including means to form a carpet zone by step-by-step feeding of an individual thread to form the pile of the carpet, and sets of shears to sever the advanced thread, one of the shears of each set being movable, that improve ment which consists of a guard device to indicate failure of a thread, including individual contact members, one in each unit, said contact members being movably mounted on the movable shears and normally urged to movement, each of said contact members engaging the thread of the corresponding unit and being held against movement thereby, a common stationary contact member comprising a wire stretched across the loom in the path of movement of the individual contact members, each of said individual contact members having a curved portion partially surrounding the wire and normally held away from the wire but adapted to engage the same, when a thread breaks, to close an electric circuit, said curved portion terminating in a hook to catch upon the wire to preserve the contact and to limit the dropping movement of the
  • each of said units including means to form a carpet Zone by step-by-step feeding of an individual thread to form the pile of the carpet
  • a guard device to indicate the failure of the thread
  • said contact members including individual contact members one in each unit, said contact members being movably mounted on the loom and normally urged to mov ment, each of said contact members engaging the thread of the corresponding unit and being held against movement thereby, a common stationary contact member in the path of movement of said individual contact members and adapted to be engaged thereby, when a thread fails, to close an electric circuit
  • said common contact member comprising a wire stretched on the loom and insulated therefrom, each of said individual contact members having a curved portion partially surrounding the wire and normally held away from the wire but adapted to engage the same, when a thread breaks, to close an electric circuit, said curved two points between the feeder and the cutting means one adjacent the feeder and one adjacent the cutting means, and a feeler normally

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US406473A 1929-08-19 1929-11-11 Stop mechanism for looms Expired - Lifetime US1956486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1956486X 1929-08-19

Publications (1)

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US1956486A true US1956486A (en) 1934-04-24

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US406473A Expired - Lifetime US1956486A (en) 1929-08-19 1929-11-11 Stop mechanism for looms

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US (1) US1956486A (en(2012))
NL (1) NL29410C (en(2012))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436438A (en) * 1946-02-06 1948-02-24 Kyner Julia Stop motion for looms, etc.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436438A (en) * 1946-02-06 1948-02-24 Kyner Julia Stop motion for looms, etc.

Also Published As

Publication number Publication date
NL29410C (en(2012))

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