US3410316A - Weft detector for loom having a weft inserted by nozzle action - Google Patents

Weft detector for loom having a weft inserted by nozzle action Download PDF

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Publication number
US3410316A
US3410316A US623449A US62344967A US3410316A US 3410316 A US3410316 A US 3410316A US 623449 A US623449 A US 623449A US 62344967 A US62344967 A US 62344967A US 3410316 A US3410316 A US 3410316A
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United States
Prior art keywords
weft
loom
threads
detector
feeler
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US623449A
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English (en)
Inventor
Joseph M Giuttari
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GREENHALGH MILLS Inc
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GREENHALGH MILLS Inc
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Priority to US623449A priority Critical patent/US3410316A/en
Priority to FR1556747D priority patent/FR1556747A/fr
Priority to GB02493/68A priority patent/GB1207223A/en
Application granted granted Critical
Publication of US3410316A publication Critical patent/US3410316A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/18—Automatic stop motions
    • D03D51/34—Weft stop motions

Definitions

  • ABSTRACT OF THE DISCLOSURE A weft detector positioned between the warp threads and the weft catching means of a loom in which the wefts are inserted by nozzle action and located ahead of a plurality of weft threads so that if any of the plurality of weft threads are present, the detector device will not stop the loom, but where all of the plurality of weft threads are absent, then the detector device will stop the loom.
  • a detector is positioned at such a point that it will engage any one of a plurality of weft threads which are inserted, and if any one of the plurality, for instance such as a group of 3 or 4, are properly inserted, then the loom will keep running. However, if the selected group of plurality of threads are all improperly inserted or do not come to a position fully across the fabric and into the Weft catching means, then the device will cause the loom to stop as such will indicate clearly an imperfect fabric. In this way many imperfections from stopping the loom are avoided.
  • FIG. 1 is a perspective view illustrating the stop motion device as in a position to permit the loom to continue operation
  • FIG. 2 is a perspective view of the device in a position which will cause stopping of the loom;
  • FIG. 3 is a diagrammatic view illustrating schematically the position of the detector in full and dotted lines in positions to permit the loom to continue operation;
  • FIG. 4 is a top plan view illustrating the relation of the detector arm in connection with the warp threads and the weft gripping means.
  • FIG. 5 is a wiring diagram of the elecric circuits involved.
  • FIG. l'the fabric in woven condition is designated 10, while the warps 11 and 12 in shedding position are illustrated in the righthand portion of the view.
  • a temple 14 is mounted on a part of the loom frame 15.
  • the weft thread catching means is designated generally 20 and comprises a plurality of threads 21, 22 and 23 which are twisted in a leno fashion to grab or catch the weft 13 as it is shot into the shed by a fluid jet action from the nozzle 24.
  • a cutter which is usually a wire at a sufficient degree of temperature to cut the weft threads, is designated 25, it being heated generally to somewhere around 800 centigrade in order to sever these weft threads.
  • the twisted cords are led over a pulley 26 and extend as at 27 to some accumulating device.
  • the various severed ends of the wefts are held in the twisted threads 21, 22 and 23. It is desirable that the twisted threads be as close to the edge of the fabric as possible so as to minimize the length of the pick and thereby reduce waste of the Weft threads. Accordingly a weft detector used in this configuration requires a small structure to be used as the weft feeler.
  • a bracket 30 serves to mount the weft contacting or feeler mechanism designated generally 31 comprising a switch 32 (see FIG. 3) having a wire-like feeler arm 33 which is of a size to permit it to be positioned between the edge of the warp threads at 34 (FIG. 4) and the weft catching means 20 and across: the plane of the woven cloth at the fell and which is at a location so that it is ahead of a plurality of weft threads 35 as seen in FIG. 3 (ahead of four weft threads here being shown) which have not been severed by a cutter.
  • a miniature snap switch is shown, although other types of electromechanical transducers such as switches may be used such as rockable mercury, for example.
  • a feeler is urged by a plunger 36 forced by spring 37 in a direction to cause the feeler 33 to be moved to the right or toward the shed as seen in FIG. 3.
  • the cutter 25 is located forward of these four weft threads 35 and these weft threads are sequentially cut as heat up occurs and the fabric is taken up.
  • the means 20 normally there would be a plurality of the weft threads 35 which have been inserted and gripped by the means 20 always located in the space between the weft gripping means 20 and the outer edge 34 of the warps. If for any instance a weft thread such as 42 or 43 is not fully inserted or weft thread 43 does not even reach the outer warp thread 34, (see FIG.
  • miniature snap switches such as 32 are of a type which may be so connected so that the circuit is either normally open or normally closed and in the case of the circuit being normally closed then the arrangement would be such that the energization of the loom would pass through this switch.
  • the switch would be normally open, then the closing of the contact such as 45 by the contact portion of the plunger 36 will cause energization of some other means which will cause the stopping of the loom.
  • Similar single pole double throw switches are available with other than snap operating mechanisms and are to be considered equivalents of the illustrated type.
  • stop motion actuation form no part of the instant invention since the main consideration is a configuration of feeler that permits location in a small space between the edge of the fabric and the weft gripping threads.
  • This feeler 33 can in turn actuate any suitable means for causing a circuit condition change.
  • FIGURE 5 is a schematic diagram, the line voltage being shown between lines 50 and 51 supplying current to a main drive motor 52 which operates the main drive shaft 53 about which there is a brake designated 54.
  • This brake is operated by solenoid 55 and controlled by closure of contacts 56 through switch 57 which normally closes the contacts 58 to maintain the motor operating.
  • a solenoid 59 controlled by switch 36 which may be the switch 32 of the diagram in FIG. 3, serves to repulse the switch 57 causing it to bridge the contacts 56 to cause a brake to engage the drive shaft and at the same time open the motor circuit to stop the motor.
  • a weft detector for a loom in which the weft threads are inserted by nozzle action to form a fabric and with the ends of said weft threads being retained adjacent the fabric edge comprising an electric circuit and switch means, a feeler arm coupled to said switch and positioned adjacent the fabric edge and held normally forward of a plurality of weft ends to engage a leading one of said plurality of said ends which hold the fceler arm in one relation and means to bias said feeler arm in a direction to permit said arm to change said relation in the absence of all of the plurality of weft ends so as to actuate said electric circuit and stop the loom.
  • a shuttleless loom having weft yarns and an array of warp yarns in which sheds are formed, means for injecting successive lengths of weft yarns into the warp shed, weft catching means spaced from one side of the array of the warp yarns for grasping the inserted weft, control circuit means for controlling the operation of the loom, an elongated feeler arm extending across the plane of the array of warps and positioned in the space between the catching means and the array of warps and normally in a position at one side of a plurality of wefts extending across said space, means to bias said feeler arm laterally of its length and laterally of said wefts extending across said space, and means responsive to the movement of said arm in the absence of all of said plurality of wefts to actuate said control circuit means.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US623449A 1967-03-15 1967-03-15 Weft detector for loom having a weft inserted by nozzle action Expired - Lifetime US3410316A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US623449A US3410316A (en) 1967-03-15 1967-03-15 Weft detector for loom having a weft inserted by nozzle action
FR1556747D FR1556747A (fr) 1967-03-15 1968-03-14
GB02493/68A GB1207223A (en) 1967-03-15 1968-03-14 Loom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US623449A US3410316A (en) 1967-03-15 1967-03-15 Weft detector for loom having a weft inserted by nozzle action

Publications (1)

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US3410316A true US3410316A (en) 1968-11-12

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US (1) US3410316A (fr)
FR (1) FR1556747A (fr)
GB (1) GB1207223A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041985A (en) * 1975-05-07 1977-08-16 Nissan Motor Company, Limited Weft sensor system of sensing malfunction of a weaving loom
US4067365A (en) * 1975-03-06 1978-01-10 Miyuki Gotoh Apparatus of stopping operation of a weaving loom
US4384596A (en) * 1981-01-07 1983-05-24 Leesona Corporation Means and method for sensing loom conditions indicative of potential fabric defects
FR2529916A1 (fr) * 1982-07-07 1984-01-13 Nissan Motor Systeme de detection de la trame dans un metier a tisser sans navette
US4607667A (en) * 1984-09-04 1986-08-26 Texfi Industries, Inc. Apparatus for severing inserted filling yarns and method
BE1012014A3 (fr) * 1997-11-13 2000-04-04 Jet Engineering Co Ltd Dispositif de retrait du dechet de trame dans un metier a tisser a tuyeres.
DE112016006821T5 (de) 2016-05-31 2019-02-28 Ford Global Technologies, Llc Mobiles Aufladen für Elektrofahrzeuge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815773A (en) * 1955-05-09 1957-12-10 Deering Milliken Res Corp Thin place detector for looms
US3135298A (en) * 1962-01-02 1964-06-02 George M Marks Electric thread cutter
US3237656A (en) * 1962-06-26 1966-03-01 Dewas Raymond Weaving loom comprising a device for the guiding and supervision of the weft thread
US3260283A (en) * 1962-12-23 1966-07-12 Elitex Sdruzeni Podniku Tertil Weft thread control device
US3297057A (en) * 1963-06-01 1967-01-10 Prince Jidosha Kogyo Kabushiki Device for grasping and guiding travelling ends of wefts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815773A (en) * 1955-05-09 1957-12-10 Deering Milliken Res Corp Thin place detector for looms
US3135298A (en) * 1962-01-02 1964-06-02 George M Marks Electric thread cutter
US3237656A (en) * 1962-06-26 1966-03-01 Dewas Raymond Weaving loom comprising a device for the guiding and supervision of the weft thread
US3260283A (en) * 1962-12-23 1966-07-12 Elitex Sdruzeni Podniku Tertil Weft thread control device
US3297057A (en) * 1963-06-01 1967-01-10 Prince Jidosha Kogyo Kabushiki Device for grasping and guiding travelling ends of wefts

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067365A (en) * 1975-03-06 1978-01-10 Miyuki Gotoh Apparatus of stopping operation of a weaving loom
US4041985A (en) * 1975-05-07 1977-08-16 Nissan Motor Company, Limited Weft sensor system of sensing malfunction of a weaving loom
US4384596A (en) * 1981-01-07 1983-05-24 Leesona Corporation Means and method for sensing loom conditions indicative of potential fabric defects
FR2529916A1 (fr) * 1982-07-07 1984-01-13 Nissan Motor Systeme de detection de la trame dans un metier a tisser sans navette
US4607667A (en) * 1984-09-04 1986-08-26 Texfi Industries, Inc. Apparatus for severing inserted filling yarns and method
BE1012014A3 (fr) * 1997-11-13 2000-04-04 Jet Engineering Co Ltd Dispositif de retrait du dechet de trame dans un metier a tisser a tuyeres.
DE112016006821T5 (de) 2016-05-31 2019-02-28 Ford Global Technologies, Llc Mobiles Aufladen für Elektrofahrzeuge

Also Published As

Publication number Publication date
FR1556747A (fr) 1969-02-07
GB1207223A (en) 1970-09-30

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