US3835895A - Loom jacquards of the double-lift type - Google Patents

Loom jacquards of the double-lift type Download PDF

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Publication number
US3835895A
US3835895A US00344825A US34482573A US3835895A US 3835895 A US3835895 A US 3835895A US 00344825 A US00344825 A US 00344825A US 34482573 A US34482573 A US 34482573A US 3835895 A US3835895 A US 3835895A
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Prior art keywords
branch
double
beak
hook
open
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Expired - Lifetime
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US00344825A
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English (en)
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D Bassi
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Staeubli Verdol SA
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Verdol SA
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Assigned to ETABLISSEMENTS STAUBLI-VERDOL, RUE DES FRERES LUMIERE, A FRENCH CORP. reassignment ETABLISSEMENTS STAUBLI-VERDOL, RUE DES FRERES LUMIERE, A FRENCH CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: VERDOL S.A., SOCIETE ANONYME
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/06—Double-lift jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/24—Features common to jacquards of different types

Definitions

  • each of the double hooks comprises a single substantially straight rod-like branch rotatable about its axis; two superposed main beaks each cooperating with one of the movable frames under control of the needle associated with the hook, these main beaks being directed substantially at 90 from each other about the axis of the branch in such manner that when one main beak is caught by a transverse knife of the corresponding movable frame the other main beak is brought by rotation of the hook about the axis of the branch, to an ineffective lateral position at which it cannot be caught by the other movable frame; and a lower openshed supporting beak adapted to cooperate either with the stationary open-shed frame at the raised position of the hook if same is to remain raised at the next stroke of the loom, or with a transverse bar of a stationary guiding and supporting grid disposed below the open-shed frame, the said open-shed supporting beak being
  • the present invention relates to loom jacquards of the double-lift type. These jacquards comprise two movable knife frames which are reciprocated vertically in opposed directions at half the rate of the loom, while each hook is conventionally realized under double form with two parallel branches each having at its free end a main beak adapted to cooperate with one of the movable frames.
  • each hook may be of equal length, in which case the movable frames should be so arranged as to compenetrate each other, but in modern double-lift jacquards these branches are generally unequal in order that one of the movable frames may remain above the other even when the former is fully lowered and the second fully raised (jacquards with superposed frames).
  • Double-lift jacquards are as a rule provided with open-shed means including an auxiliary or open-shed beak on one of the branches of each hook and a stationary open-shed knife frame which supports the open-shed beak of those of the hooks which are to remain raised at the next stroke of the loom.
  • a difficulty encountered with such double-lift jacquards is that when a previously raised hook is being lowered by the one of the movable frames which effects its descending stroke, the main beak of this hook corresponding to the. other movable frame should not be caught by the latter which is then effecting its ascending stoke This means that the needles should maintain their pushing action until the frames have passed the crossing point of their operative cycle, i.e. the position at which, if the movable frames, were at standstill, they could simultaneously support each one of the main beaks of each hook.
  • the time during which the perforated cards of the jacquard may be disengaged from the feeler needles in order to permit rotation of the cylinder is correspondingly reduced, which of course is a marked disadvantage in the case of highspeed looms.
  • the invention concerns a double-lift jacquard of the superposed knife frame type with double hooks each having a single branch and two downwardly extending main beaks, wherein the main beaks of each hook are directed at about 90 from each other about the axis of the branch which is freely rotatable about its own axis, in such manner that when one of the said main beaks is supported by the corresponding one of the said movable knife frames, the other main beak is directed laterally with respect to the jacquard and thus cannot be caught by the other movable knife, while means are provided for bringing each lowered hook to such an angular position about the axis of its branch that its main beaks extend substantially at 45 with respect to the knives of the movable knife frames and may be caught by one of the latter when the hook is to be raised.
  • FIG. 1 is a diagrammatical view illustrating the main components of a double-lift open-shed jacquard according to this invention.
  • FIG. 2 is a front wiew of one of the hooks of this jacquard.
  • FIG. 3 is a plan view corresponding to FIG. 2.
  • FIG. 4 is a diagrammatical side view showing the hook supported by the open-shed knife frame, the upper and lower movable knife frames being respectively descending and ascending.
  • FIG. 5 shows the hook raised by the lower movable knife frame at the end of its ascending stroke.
  • FIG. 6 is a plan view of the hook when being raised or lowered by the lower movable knife frame.
  • FIGS. 7 and 8 illustrate two successive positions of the hook while it is lowered by the lower movable knife frame and after its open-shed beak has freely passed in front of the open-shed knife frame.
  • FIG. 9 is a view similar to FIG. 7, but illustrating the hook as being lowered by the upper movable knife frame.
  • FIG. 10 is a plan view similar to FIG. 6, but in which the hook is illustrated as being supported by the upper movable knife frame. I
  • FIGS. 11 and 12 illustrate the hook at its lowered position with the upper and lower movable frames beginning respectively their descending and ascending strokes in FIG. 11 and their ascending and descending strokes in FIG. 12.
  • FIG. 13 is a diagram showing the extent of the pressing period with respect to the operative cycle of the movable knife frames.
  • a double-lift open-shed jacquard of the Verdol type comprises a large number of hooks 1, two only of which have been illustrated for the sake of clearness.
  • each hook is slidably connected with a needle 2, all these needles being guided in perforations of a first guiding plate 3 situated on the left with respect to the hook and of a second guiding plate, not illustrated, disposed on the right, where the said needles are submitted to the action of biassingsprings 2b.
  • Needles 2 are actuated by pushers 4 having a first end guided by a plate 5 provided in the vicinity of plate 3, while their second end carries vertical feeler needles 6 adapted to cooperate with the perforated Verdol pattern paper 7.
  • the second end of pushers 4 is raised and lowered together with feeler needles 6 by a set of L-shaped bars 8 which are at the same time reciprocated horizontally to actuate those of pushers 4 whose feeler needles 6 have been retained by an unperforated zone of paper 7,.
  • Each hook 1 (FIGS. 2 and 3) comprises a single straight rod-like branch 9 made of steel wireand which has, starting from its upper end, a first main beak 10, then a second main beak 11 which, as seen from above, is directed at from the first one about the axis of the branch, and finally an open-shed beak 12 extending along the bissectrix of the angle formed by the main beaks 10 and 11, in the vicinity of thelower end of branch 9, this lower end being formed with an eyelet 13 adapted to receive a harness cord 14 (FIG. 1).
  • the corresponding needle 2 forms the usual loop 2a which surrounds branch 9 between the lower main beak 11 and the open-shed beak 12.
  • Beaks 10, 11 and 12 are preferably in the form of straight downwardly directed fingers which are welded to branch 9.
  • Each main beak 10 is adapted to cooperate with a knife 15 (FIG. 1) of the upper movable knife frame 16 of the jacquard, while the corresponding main beak 11 may cooperate with a knife 17 of the lower movable knife frame 18.
  • the open-shed beak 12 it cooperates either with a knife 19 of a stationary open-shed knife frame 20 or with one of the transverse bars 22 of a lower guiding and supporting grid 21.
  • FIG. 4 illustrates a hook I having its open-shed beak 12 supported by a knife 19 of the open-shed frame 20.
  • the angular position of beaks 10, l1 and 12 is then as shown in FIG. 3 wherein knife 19 is indicated in dash and dot lines.
  • this knife is inclined at the same angle as beak 12.
  • the main beaks 10 and 11 are at 45 on each side of beak 12.
  • the knives 15, 17 of the movable frames and the transverse bars 22 of the lower guiding and supporting grid are situated above or below knife 19 and are therefore also represented by the dash and dot line of FIG. 3. They are quite similar to knife 19 in crosssection.
  • hook I Assuming the needle 2 of hook I is pushed, hook I is deviated, its open-shed beak 12 being moved backwards, i.e. to the right, in such manner that at the beginning of the descending stroke of knife 17 it escapes the corresponding knife 19 of the open-shed frame, as illustrated in FIG. 7.
  • the neddles 2 are then liberated from the action of pushers 4 and of bars 8 (FIG. 1), and hook I returns to its former vertical position. It is obvious that the operative steps just described remain the same when hook I is raised by the knife 15 of the upper movable frame 16 during another beat of the loom, except that hook I is then supported by its upper main beak l0.
  • grid 21 also comprises longitudinal bars, not illustrated, which guide hooks 1 laterally.
  • hook I If hook I is not to be raised, its needle 2 is pushed towards the right and it deviates the hook about bar 22, as illustrated in FIGS. 11 and 12 which respectively correspond to the ascending step of knife 17 or of knife 15. In both cases the main beaks l0 and 11 are displaced backwards (to the right in the figures) and they cannot be caught by the ascending knife.
  • FIG. 13 shows the diagram of the vertical motion of the movable knife frames 16 and 18 (knives l5 and 17).
  • the pushing period during which the needles act on the hooks should extend from the end of the stroke of the movable frames to a point situated somewhat beyond their crossing point, this corresponding to the time T, while in the jacquard according to the invention the said pressing period may end just after the open-shed beaks 12 of the hooks 1 which are to be lowered, have passed the corresponding knives 19 of the open-shed frame 20.
  • the time available for the rotation of the cylinder which supports the pattern paper and for the selection of the feeler needles is thus considerabhy increased.
  • the hooks are deviated and no more resiliently flexed as in conventional double-lift jacquards, which reduces the stresses to which the needles and their actuating mechanism are submitted in operation.
  • double hooks each adapted to be selectively driven vertically by a knife of any of said movable knife frames to be raised or lowered by same;
  • each of said double hooks including a single substantially straight branch having an axis, said branch being rotatable about said axis, and two superposed main beaks extending obliquely downwardly from said branch, said main beaks being substantially directed at 90 from each other about the axis of said branch;
  • said jacquard further comprising first orientating means to bring each lowered hook to such an angular position about the axis of its branch that its main beaks extend substantially at 45 to the knives of said knife frames about the axis of said branch.
  • a double-lift jacquard as claimed in claim 1 comprising a stationary open-shed frame having knives parallel to the knives of said movable knife frame, with the branch of each of said double hooks having a downwardly extending open-shed beak to cooperate with a knife of said stationary open-shed frame:
  • said first orientating means comprising:
  • auxiliary supporting beak carried by the branch of each double hook to cooperate with one of said transverse bars to support said last-named hook when same has been lowered by one of said movable frames, with said supporting beak being directed along the bissectrix of the angle formed by the main beaks of said lastnamed double hooks about the axis of its branch.
  • said first orientating means comprising:

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
US00344825A 1972-04-11 1973-03-26 Loom jacquards of the double-lift type Expired - Lifetime US3835895A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7213495A FR2179655B1 (fi) 1972-04-11 1972-04-11

Publications (1)

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US3835895A true US3835895A (en) 1974-09-17

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US00344825A Expired - Lifetime US3835895A (en) 1972-04-11 1973-03-26 Loom jacquards of the double-lift type

Country Status (10)

Country Link
US (1) US3835895A (fi)
JP (1) JPS5719213B2 (fi)
BE (1) BE797869A (fi)
CH (1) CH569109A5 (fi)
DD (1) DD105259A5 (fi)
ES (1) ES413539A1 (fi)
FR (1) FR2179655B1 (fi)
GB (1) GB1388654A (fi)
IT (1) IT983760B (fi)
SU (1) SU531490A3 (fi)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967652A (en) * 1973-07-06 1976-07-06 Staubli Ltd. Spring hook for the harness pull of a double-lift open-shed jacquard machine
US4041987A (en) * 1976-08-23 1977-08-16 Sulzer Brothers Limited Jacquard machine equipped with lifting wires and stationary arresting blades
US4067363A (en) * 1975-07-25 1978-01-10 Firma Grosse Webereimaschinen Gmbh Shedding device for weaving looms, in particular for double-lift open-shed jacquard machines
US4529011A (en) * 1982-07-19 1985-07-16 Societe Staubli-Verdol Systems with orientable hooks
US20050150563A1 (en) * 2002-02-07 2005-07-14 Dario Bassi Device fo shed formation and jacquard loom comprising same

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2846793B1 (de) * 1978-10-27 1980-04-17 Zangs Ag Maschf Doppelhub-Offenfach-Jacquardmaschine
DE2846792C2 (de) * 1978-10-27 1982-03-04 Maschinenfabrik Carl Zangs Ag, 4150 Krefeld Doppelhub-Offenfach-Jacquardmaschine
DE3011190C2 (de) * 1980-03-22 1983-09-01 Grosse Webereimaschinen Gmbh, 7910 Neu-Ulm Doppelhub-Offenfach-Jacquardmaschine
JPS57121903U (fi) * 1981-01-22 1982-07-29
JPS57121904U (fi) * 1981-01-23 1982-07-29
IT1201101B (it) * 1983-08-12 1989-01-27 Eimtessile Fabbrica Italiana M Arpino ad asta unica per macchine d'armatura jacquard con esso realizzata
JPS61117911U (fi) * 1985-01-09 1986-07-25
FR2590280B1 (fr) * 1985-11-21 1987-12-24 Staubli Verdol Mecanique d'armure a crochets tournants pourvus d'un systeme de maintien desdits crochets
GB9422519D0 (en) * 1994-11-08 1995-01-04 Bonas Machine Co Heald control mechanism

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US500852A (en) * 1893-07-04 Jacquard mechanism for looms
DE340349C (de) * 1920-01-07 1921-09-09 Franz Pawelka Doppelfach-Jacquardmaschine
US3186439A (en) * 1961-08-26 1965-06-01 Ver Towfabrieken Nv Jacquard looms
US3455339A (en) * 1967-01-04 1969-07-15 Schleicher Oskar Maschf Double-lift,open-shed jacquard loom

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US500852A (en) * 1893-07-04 Jacquard mechanism for looms
DE340349C (de) * 1920-01-07 1921-09-09 Franz Pawelka Doppelfach-Jacquardmaschine
US3186439A (en) * 1961-08-26 1965-06-01 Ver Towfabrieken Nv Jacquard looms
US3455339A (en) * 1967-01-04 1969-07-15 Schleicher Oskar Maschf Double-lift,open-shed jacquard loom

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967652A (en) * 1973-07-06 1976-07-06 Staubli Ltd. Spring hook for the harness pull of a double-lift open-shed jacquard machine
US4067363A (en) * 1975-07-25 1978-01-10 Firma Grosse Webereimaschinen Gmbh Shedding device for weaving looms, in particular for double-lift open-shed jacquard machines
US4041987A (en) * 1976-08-23 1977-08-16 Sulzer Brothers Limited Jacquard machine equipped with lifting wires and stationary arresting blades
US4529011A (en) * 1982-07-19 1985-07-16 Societe Staubli-Verdol Systems with orientable hooks
US20050150563A1 (en) * 2002-02-07 2005-07-14 Dario Bassi Device fo shed formation and jacquard loom comprising same
US7017617B2 (en) * 2002-02-07 2006-03-28 Staubli Lyon Device for shed formation and Jacquard loom comprising same
CN100572628C (zh) * 2002-02-07 2009-12-23 施托布利里昂公司 梭口形成装置和包含该装置的提花织机

Also Published As

Publication number Publication date
CH569109A5 (fi) 1975-11-14
FR2179655A1 (fi) 1973-11-23
JPS5719213B2 (fi) 1982-04-21
GB1388654A (en) 1975-03-26
JPS497564A (fi) 1974-01-23
IT983760B (it) 1974-11-11
DE2316649B2 (de) 1976-10-14
DD105259A5 (fi) 1974-04-12
BE797869A (fr) 1973-07-31
ES413539A1 (es) 1976-01-16
SU531490A3 (ru) 1976-10-05
DE2316649A1 (de) 1973-10-18
FR2179655B1 (fi) 1976-06-11

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AS Assignment

Owner name: ETABLISSEMENTS STAUBLI-VERDOL, RUE DES FRERES LUMI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:VERDOL S.A., SOCIETE ANONYME;REEL/FRAME:004963/0314

Effective date: 19880717

Owner name: ETABLISSEMENTS STAUBLI-VERDOL, RUE DES FRERES LUMI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VERDOL S.A., SOCIETE ANONYME;REEL/FRAME:004963/0314

Effective date: 19880717