US3542085A - Multicolor pick change device for weaving machines - Google Patents

Multicolor pick change device for weaving machines Download PDF

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Publication number
US3542085A
US3542085A US769943A US3542085DA US3542085A US 3542085 A US3542085 A US 3542085A US 769943 A US769943 A US 769943A US 3542085D A US3542085D A US 3542085DA US 3542085 A US3542085 A US 3542085A
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United States
Prior art keywords
thread
feeders
feeder
levers
weft
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Expired - Lifetime
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US769943A
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English (en)
Inventor
Paul Haltmeier
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Georg Fischer AG
Original Assignee
Georg Fischer AG
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Filing date
Publication date
Priority claimed from CH1494167A external-priority patent/CH465524A/de
Application filed by Georg Fischer AG filed Critical Georg Fischer AG
Application granted granted Critical
Publication of US3542085A publication Critical patent/US3542085A/en
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Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms

Definitions

  • ABSTRACT The present invention relates to a multicolor pick change device for weaving machines of the type in which weft is drawn from a supply located outside a shed of a fabric being woven, with vat least two thread feeders withthread eyelets that guide the weft threads connected to the s'elvage from the supply. cones and are employed to feedfithe weft thread selectively in the color to be inserted in the shed to a point where it can be picked up or taken over by a weft inserting member.
  • pickchange devices for this type of weaving machine and already known in the art'thedelivery motionof the thread feeders is obtained by pneumatic actuation. It involves the dis mutrrcotottrllcx I QItWEAVING advantage that the-rate 'ofoperation of the weaving machines is lirnitedby the mode" of "operation of the pressure cylinders and that it requires costly equipment such as numerous con;
  • trol valves and a compressor or other source ofairpressure.
  • pick'change devices are known in whichthe drive of l the delivery motion 'of the thread feeders x is' effected 'by mechanical or electromagnetic means which," however ,'overlap the weft threads in readiness in'such a'ma'nner owing to their design thatopera'ting tlfemachirre is rendereddiffiCnltl 2:: DESCRIPTION-9F Tris PREFERREDEMBODIMENT A s s'eenin FIG.
  • rjr mthreadfeeders l ⁇ throu h-4 are rotatably arranged on Bolts 6' thr'ou'gh9 attached; to the weaving'machine frame and-so dispo'sedt'hat thread eyeletsl', 3'.
  • each of the thread'feeders can beswung'about anairis of rotation sub; stantially parallel with the thread eyelet, that the ends of the thet'hread feeding point-82111 ieedenl isthus-disposed-in a single vertical plane.
  • Feeders -2, 3 and 4 are progressively crankedat their ends to an extentto bririgtheir ends into the .samesp'lane 5 of feeder l.
  • Pivots. 6+9 are -so arranged that eyelets ,-l "-4' swing ⁇ :lotvnftothe point 82.
  • the 'feed motion is effected by the "pressure of one of the'associated drivers 22%25; 'one-foreach thread feeder, the said pressure..beingexerted on :the feederslever arms,-'l 8--21,,FIGS.;-3 and4 also, thesaiddriversbeing inth'eir turn-individually rotatable on a common s'pihdle 25a on slide 126.
  • liegslide 26 is guidedby.a.-slot 27fengaging a thread delivery memberscarrying.thethread eyelets arranged cranked-'onoffset that each thread 'feeder'end and .its -'aspickuppo'int
  • Theinvention also or'np'risesa simple and positive, means to it dobby, jacquard or other pattern means so that the dictates of control the feeders in a -pr'o'perly timed,-and nonint'erferin'gf relationship, and further, to govern their actuation frorn'a that patternshall be s'tore'ci 'andfthen niade' effe'ctiveat the proper pointin the cycle.
  • FIG. 1 is a' view of the thread feeders according to thisinventioman'd a cam drive shownin operative position fo parting motion to the'feeders;
  • FIG. 2 is a schematic'view of the arrangementaccordingto the invention of thread. selection levers,- controljsh'afts and transfer members from the card contro'l the cam drivebeing represented .in its idle position andfthe weaving machineframe unit or a dobby or jacquard (machine (not shown so that-the so shown in partial sectio'ri thatithethread'feeders' cannot be seen;
  • FIG. 3 is a section alon'g line rn-nr in FIG. 3 with thear rangement of the select-ion lever whenthe'driver is operatiye and shown in plan view;
  • FIG. 4 is a similar section-along 1ineIIl'-IIl in FIG. 2 butwith the arrangement of tires election lever whenthe' driver is'inoperativei'
  • FIG. 5 is a section along line V-V in FIG. 2'withthe spring I,
  • This storage is operative for its intended purpose when the downward movement of slide 26 on the return of a thread feeder into its idle position causes the fixed levers 49 and 50 to be released by the lugs 51 and 52 and the control shafts 47 and 48 rotate under the action of the tensioned torsion springs 53 and 54 so as to move the necessary selection lever with the associated driver into operative position.
  • the color selection device described could, in a manner not shown, be provided. in stead of with two control shafts 47 and 48 for four colors. only with one control shaft for two colors or with three or more control shafts for six, eight or more colors.
  • Transfer of motionfrom the card control attachment to the levers 55 and 56 in the one direction is effected positively by means of wire ropes or'cords 58 and 59 guided by rollers 57 and, in the other direction, by tension springs 60 and 61 attached to the machine frame and to arms 55" and 56'', F168. 2 and 6.
  • the wire ropes may be replaced by other means of transmission, e.g. connecting rods and levers.
  • wire cords- 58, 59, or one of them may pull levers 55", 56" and rotate levers 55, 56 and their extensions to tension a spring 53, 54', as the case may be.
  • lugs 51, 52 release arms 49', 50' whereupon the stored tension in the springs rotates the shafts 47, 48 to complete the pattern selection for thedrivers and change the feeders as governed by cam 37.
  • the transmission of motion to the levers 55 and 56 is transmitted, via curved levers 65 and 66 rotatably arranged on a fixed shaft 64 and connected to the dobby by means of connecting rods 62 and 63, to roller levers 68 and 69 rotatably arranged on the fixed shaft 67 and connected to the wire ropes 58 and 59.
  • the curved portions 65' and66 are preceded by radially curved contours to ensure that the control motion desirable for the partial intermediate lowering of the shafts is not transferred to the multicolor pick change device.
  • the curved levers 65 and 66 may also be replaced by slides.
  • the contour of the cam ends of the levers is such that the desiredly ineffective motion does not affect the levers 68, 69 but further motion does. If one of the thread feeders 1, 2, 3 or 4 has projected to the thread pickup point, a locking lever 71, FIGS. 7 and 8, pivoted on a fixed bolt 70 moves, under the action of a spring 78, its shoulder 71' underneath the lifted slide 26, FIG. 7. This will hold the said slide and, together with it, the thread feeder, in their position as long as picks of the same color are inserted in the shed.
  • the cam 37 keeps on rotating and moves with its flat or inactive portion 37, past a roller 72 with some play. When the card of the card control attachment indicates a change of color inserted, the wire cords 58 and 59 cause one or both of the levers 55 and 56 to perform an angular movement.
  • the appropriate thread feeder 1, 2, 3 or 4 is moved back into its idle position by the action of the spring 10, ll, 12 or 13 and the pawl 80 is forced into its initial position when struck by the slide 26, HO. 2, where it releases the nose 80' i in operation a stored selection will cause the desired selecting lever 38-41 to set its driver-22-25, as the case may be, and upward motion of slide 26 will move the corresponding feeder to position for its weft to be taken by the carrier.
  • cranks may also be arranged in a reverse or different order.
  • the speed of the weaving machine is not limited by the pick change device thanks to thefullyrnechanical drive of the thread feeders and the small masses moved.
  • a multicolor pick change device for weaving machines with at least two thread feeders, a thread eyelet for each feeder which guides a weft thread being drawn from supply cones arranged outside the shed of a fabric'being woven and which can move the weft thread of the color to be inserted in the shed to a point ofpickup where it can be engaged by a weft inserting carrier, characterized in that, spaced and parallel pivots are provided, one for each of the thread feeders and so positioned and directed that each thread feeder swivels about its own axis of rotation substantially parallel with the axis of its thread eyelet, ends of the thread feeders being arranged in a plane substantially normal to the direction of the threads and in which ends said thread eyelets are fixed, some of said feeder ends also being laterally offset into a plane of a companion feeder end so that each of the feeder ends and its eyelets can be swung into an operative position to a thread pickup point which is common to all thread feeding eyelets.
  • a multicolor pick change device for weavingmachines with at least two thread feeders a thread eyelet for each feeder which guides a weft thread being drawn from supply cones arranged outside the shed of a fabric being woven and which can move the weft thread of the color to be inserted in the shed to a point ofpickup where it can be engaged by a weft inserting carrier, characterized inthat, spaced and parallel pivots are provided, one for each of the thread feeders and so positioned and directed that each thread feeder swivels about its own axis of rotation substantially parallel with the axis of its thread eyelet, ends of the thread feeders being arranged in a plane substantially normal to the direction of the threads and feeder end so that each of the feeder ends and its eyelets can I be swung into an operative position to a thread pickup point which is common to all thread feeding eyelets, and means for moving said .thread feeders to and from weft feeding position which includes springs to move them from feeding position and' a sliding drive member, drivers
  • the movable member comprises a slide, a shaft on said slide on which said storing pattern indications for change, said means also'un fixed to the shaft, another arm free ly rotatable on the shaft and movable by a pattern selecting means, a spring connection between the said arms which tensioned at selection indication and which acts to set the shaft and levers in accordance with that stored selection when the locking means for the shaft is released.
  • said locking means comprises an arm extending from the driver carrying membenlugs on the arm and projections from the shaft engagea-ble by said lugs when the driver carrier member is released'and movesto one extreme position under the influence of its return spring.
  • the means for effecting and storing pattern'indications is effected via certain levers having ,a cam contour which comprises a strokeless portion and a curved cam portion.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US769943A 1967-10-25 1968-10-23 Multicolor pick change device for weaving machines Expired - Lifetime US3542085A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1494167A CH465524A (de) 1967-09-18 1967-10-25 Mehrfarben-Schusswechsel-Einrichtung für Webmaschinen

Publications (1)

Publication Number Publication Date
US3542085A true US3542085A (en) 1970-11-24

Family

ID=4405037

Family Applications (1)

Application Number Title Priority Date Filing Date
US769943A Expired - Lifetime US3542085A (en) 1967-10-25 1968-10-23 Multicolor pick change device for weaving machines

Country Status (7)

Country Link
US (1) US3542085A (enrdf_load_stackoverflow)
JP (1) JPS505315B1 (enrdf_load_stackoverflow)
BR (1) BR6803317D0 (enrdf_load_stackoverflow)
DE (1) DE1801016C3 (enrdf_load_stackoverflow)
ES (1) ES359941A1 (enrdf_load_stackoverflow)
FR (1) FR1586795A (enrdf_load_stackoverflow)
GB (1) GB1230443A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5458163A (en) * 1993-08-02 1995-10-17 Lindauer Dornier Gesellschaft Mbh Cassette apparatus for presenting weft threads to a weft thread insertion member in a loom
US5694982A (en) * 1993-12-23 1997-12-09 N.V. Michel Van De Wiele Weft thread selection device
US20020166602A1 (en) * 2001-04-20 2002-11-14 Ferdi Dejaegere Device for presenting weft yarns on a rapier weaving machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4021378A1 (de) * 1990-07-05 1992-01-16 Sfs Stadler Holding Ag Vorrichtung zum bohren oder zum eindrehen von selbstbohrenden befestigern
IT1293507B1 (it) * 1997-07-30 1999-03-01 Nuovo Pignone Spa Dispositivo selettore per la presentazione dei fili di trama nei telai tessili senza navetta

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5458163A (en) * 1993-08-02 1995-10-17 Lindauer Dornier Gesellschaft Mbh Cassette apparatus for presenting weft threads to a weft thread insertion member in a loom
US5694982A (en) * 1993-12-23 1997-12-09 N.V. Michel Van De Wiele Weft thread selection device
US20020166602A1 (en) * 2001-04-20 2002-11-14 Ferdi Dejaegere Device for presenting weft yarns on a rapier weaving machine
US6725886B2 (en) * 2001-04-20 2004-04-27 Ferdi Dejaegere Device for presenting weft yarns on a rapier weaving machine

Also Published As

Publication number Publication date
DE1801016C3 (de) 1974-08-08
JPS505315B1 (enrdf_load_stackoverflow) 1975-03-03
DE1801016A1 (de) 1969-10-16
BR6803317D0 (pt) 1973-05-03
GB1230443A (enrdf_load_stackoverflow) 1971-05-05
ES359941A1 (es) 1970-06-16
FR1586795A (enrdf_load_stackoverflow) 1970-02-27
DE1801016B2 (de) 1973-06-07

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