US3500873A - Apparatus for controlling the movement of a dobby jack lever in accordance with a pattern card - Google Patents

Apparatus for controlling the movement of a dobby jack lever in accordance with a pattern card Download PDF

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Publication number
US3500873A
US3500873A US723366A US3500873DA US3500873A US 3500873 A US3500873 A US 3500873A US 723366 A US723366 A US 723366A US 3500873D A US3500873D A US 3500873DA US 3500873 A US3500873 A US 3500873A
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Prior art keywords
needles
control
movement
pattern card
pattern
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Expired - Lifetime
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US723366A
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English (en)
Inventor
Walter Kleiner
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Gebr Staubli & Co
Staubli Geb & Co
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Staubli Geb & Co
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • D03C1/22—Needles; Needle boxes; Needle boards

Definitions

  • This invention relates generally to looms and more particularly to dobbies for effecting shedding in looms in accordance with a predetermined pattern which is indicated by a pattern card.
  • pattern cards which transmit a movement direct to a power-transmitting member for example by means of wooden pegs, cams, iron rollers or the like
  • pattern cards e.g. perforated cards made of paper, cardboard or the like, from which the controlling movement is read off by means of needles, electrical contacts or the like. Both types of cards are struck or perforated in advance and can be used and run through the dobby virtually as often as desired for the production of the same pattern.
  • the pattern cards provided with cams and the like which exert a direct control and force, must be constructed correspondingly strongly, since they are exposed to great stress and should not become worn if a constantly reliable control is to be obtained.
  • Their strong and heavy construction has the disadvantage that they require a great deal of space, all the more since the control members for consecutive picks must be separated from each other by at least the width of the cam, needle or roller.
  • Pattern cards of this type are also unsuitable for large weaving patterns due to their weight and space requirements, however they have the advantage that their drive can be achieved continuously.
  • indefinitely long patterns can be controlled by means of perforated cards, since on the one hand the holes of adjacent picks are arranged very close and even overlap each other, and the paper or cardboard can easily be folded into a small space.
  • the disadvantage consists in that no movement requiring power can be started, i.e. direct control is not achieved, but additional passive means must be provided, which after their engagement are driven and exert force.
  • An object of the present invention is to provide an arrangement in which perforated pattern cards are used, the control of the movement means of the shafts occurring as far as possible directly from the pattern card.
  • the apparatus according to the invention which is distinguished in that before reaching its control position the pattern card is furnished with needles projecting beyond the pattern card, which needles as far as possible directly or indirectly take over the control of the movement means of the shaft, and that after the control of the movement means the needles are once more removed from the pattern cards.
  • control arrangement for carrying out this operation in a dob-by with a pattern card with perforations according to the pattern, which is guided on a driving cylinder through an operating zone, and means to be controlled by the pattern card, which serve for bringing about the movement of the shafts, which is characterized in that in front of or in the driving cylinder there is arranged a supply container with needles, with which the pattern card is furnished, and the needles are held by means of the driving cylinder, and that means are arranged to convey the needles back into the supply container after passing through the control path.
  • FIG. 1 is a diagrammatic illustration of control and movement mechanism of a dobby of the Hattersley type
  • FIG. 2 is a diagrammatic illustration of a newer control and movement mechanism of a dobb with a driving cylinder, which furnishes the perforated pattern card with needles;
  • FIG. 3 is a modification of the driving cylinder of the pattern card
  • FIG. 4 is a further modification of the driving cylinder of the pattern card on a larger scale
  • FIG. 5 is a section view of three divisions of the shaft on the radius V and FIG. 6 is the same section on the radius VI in FIG. 4;
  • FIG. 7 is a section view of a driving cylinder of the perforated pattern card, which before reaching the cylinder is furnished with needles;
  • FIG. 8 is a fragmentary section view of a similar arrangement for furnishing the perforations of the pattern card.
  • a perforated pattern card 1 is driven by a driving cylinder 2, the needles 3, which will subsequently be described in greater detail, by striking against the sliding surface 4 of the double lever 5. moving the latter in the direction of arrow A against the force of the spring 7 about a stationary pivot point 6.
  • the pushing needles 9a, 9b which are each located on a double lever 5 and are guided in guides 10a, 10b serve to control draw-hooks 8a, 8b.
  • FIG. 2 shows another type of drive for the' movement of the shaft.
  • a jack lever 13 from which the pulling device 14 leads to the shaft.
  • the attachment hooks 18c and 18d fixed on the ends of the baulk, which slide in the rails 19, are alternately extended. Now if the corresponding arrester hooks 20c, 20d is in the engagement position (upper hook 200) or in the non-engagement position (lower hook 20d) then the attachment hook 18c or 18d remains extended or it returns with the pusher rail 17 and the baulk 12.
  • the segment 21 is mounted at the stationary pivot point 22, so that it swings to and fro according to arrow C, and it has two guideways 23c and 23d each with a slide block 250 or 25d which has an arm 24c or 24d.
  • the position of the slide block 250 or 25d is controlled by the needle 3' which is mounted in the driving cylinder 2', and projects through a perforation 37 of the pattern card 1, and on brushing past in the direction of arrow B it rocks the double lever 50 or d.
  • Arrester hooks 200 or 20d and intermediate levers 26c or 26d cooperate in the following way: They are both mounted to rotate about the same stationary pivot point 27c, 27d. In the stationary position the arrester hooks 20c, 20d lie under the action of tension springs 28c, 28d against their stops 29c, 29d, whereas the compression springs 30c, 30d keep the angle of swing between the arrester hook and the intermediate lever at a maximum, i.e.
  • the arrester hook 20c, 20d bears against the offset edge 31c, 31d of the intermediate lever 26c, 26d. If, due to the movement of the slide block 25c, 25d with its arm 24c, 24d, there occurs a movement of the intermediate lever 26c, 26d, then the edge 31c, 31d falls back and, since the compression spring 30c, 30d is more powerful than the tension spring 28c, 28d, the arrester hook 20c, 20d moves with it. The actual hook part comes to lie in the path of movement of the attachment hook 18c, 18d, where it falls back for a short time for being hooked.
  • FIGS. 2-6 three principal types of construction of driving cylinders 2 provided with needles 3 can be seen.
  • FIGS. 7 and 8 show two arrangements in which a device is located in front of the driving cylinder, which serves for furnishing the perforations of the pattern card with needles and the removal of these needles behind the driving cylinder. All these constructions according to FIGS. 2-8 are suitable as illustrated, or in combination, for the direct and power-operated control of a dobby.
  • the cylinder 2 has an annular space 32, in which are located the heads 33 of the needles 3' lying in the radial bores of the cylinder.
  • the cross sectional area F1 of the heads 33' is greater than the area of cross sectional area F2 of the needle stems.
  • the compressed air pipe 34 opens into the annular space which is sealed off all around, so that in it there is a constant excess pressure P. Since F1 F2 and in addition there is an excess pressure in the annular space, a constant force acts on the needle 3, which can push the latter radially outwards, provided that in front of the corresponding bore of the cylinder there is a perforation of the pattern card. If there is no perforation the needle is retained without any damage to the pattern card, since the motive power of the needle is very small.
  • FIG. 4 shows an arrangement of this type, wherein on both sides of the control region D outside the driving cylinder 2" for 'the perforated'pattern 'card'l there is arranged either a permanent or electromagnet 36.
  • the needles 3'" are magnetically drawn out, provided that there are perforations 37 in the pattern card opposite the cylinder bores.
  • the driving cylinder can rotate in both directions.
  • the control arrangement functions in a forwards direction as well as in a backwards one.
  • the movement of the needles can be achieved in the most simple manner by their own weight, the control lever preferably being located underneath the driving cylinder.
  • the needle 3" has a head 33" at their inner end, which has an approximately elliptical shape.
  • annular space 32' of the cylinder In the control region and reaching somewhat beyond the latter on both sides is an annular space 32' of the cylinder, in which the needle heads are arranged and two concentric guide grooves 38, which do not turn with the cylinder and are as wide as the needle head. The width of the entire angular space corresponds to the length of the needles extending beyond the cylinder.
  • the needle heads 33" reach one of the guide grooves on further rotation of the cylinder 2. Now even when the magnetic force is no longer effective, the needle remains in its controlled position, until the head has slid out of the guide grooves 38.
  • a guide plate 39 which retains the needles when the pattern card is not passing over the cylinder.
  • the perforated pattern card 1 rolls on the driving cylinder 2 in the direction of arrow F.
  • a feeding device 40 for the needles 3 from which as the pattern card passes the control perforations in it are furnished with needles 3 due to the weight of the needles.
  • the head 42 of the needle serves as a support and reaches a recess 41, so that the needle, on sliding past in the control region is prevented from lateral tilting and being pushed back.
  • the needles 3 fall due to their own weight into the funnel 43 of the feeding device, where they are stacked in a desired position in a known way.
  • FIG. 8 shows a similar arrangement.
  • F is the direction of rotation of the driving cylinder 2".
  • a feeding device 44 from which the perforations of the pattern card are furnished with needles 3".
  • the sliding surface 45 prevents the needles from falling out before they are sunk in the bores 46 of the driving cylinder.
  • the needles 3 deposited in such a way through the control region D are coupled to an exertion of force in the driving cylinder 2 and later fall into the funnel 47, from which they are supplied to the feeding device 44.
  • the needles can be formed symmetrical to the head 42, so that during the control with the needle one part of the needle projects beyond the pattern card and the other part remains in the driving cylinder.
  • the cylinder can have a magnetic core, which retains the needles over the desired region, or there can be arranged a coil which works magnetically, around each bore provided to receive a needle.
  • a further possibility for holding and protecting the needles in the bores of the driving cylinder can consist in that the needles have a rear contact, in which a safety catch of the bore engages.
  • An apparatus for controlling the movement of a dobby jack lever comprising: a pivotally mounted jack lever; a rotatably mounted driving cylinder having a hollow center portion; a plurality of radial bores extending through the outer periphery of said driving cylinder and communicating with said hollow center portion; a supply of control needles positioned within said hollow center portion to project through said radial bores; a pattern card carried by said driving cylinder through an operating zone; said pattern card having perforations therein according to a predetermined pattern, said perforations sized to receive therethrough end portions of said control needles; magnetic means disposed in said operating zone for displacing said control needles through both said radial bores and said pattern card perforations when said radial bores and said pattern card perforations are aligned; means for limiting the displacement of said control needles; means for maintaining said control needles in their displaced position during their movement through said operating zone; and means responsive to the displacement of said control needles for imparting movement to said jack lever in
  • An apparatus for controlling the movement of a dobby jack lever comprising: a pivotally mounted jack lever; a rotatably mounted driving cylinder having a hollow center portion; a plurality of radial bores extending through the outer periphery of said driving cylinder and communicating with said hollow center portion; a supply of control needles positioned within said hollow center portion to project through said radial bores; a pattern card carried by said driving cylinder-through an operating zone; said pattern card having perforations therein according to a predetermined pattern, said perforations sized to receive therethrough end portions of said control needles; means disposed in said operating zone for supplying during use of the apparatus pressurized fluid to said hollow center portion to displace said control needles through both said radial bores and said pattern card perforations when said radial bores and said pattern card perforations are aligned; means including said last-mentioned means for maintaining said control needles in their displaced position during their movement through said operating zone; and means responsive to the displacement of said control
  • An apparatus for controlling the movement of a dobby jack lever comprising: a pivotally mounted jack lever; a rotatably mounted driving cylinder having a hollow center portion; a plurality of radial bores extending through the outer periphery of said driving cylinder and communicating with said hollow center portion; a supply of control needles positioned within said hollow center portion to project through said radial bores, each of said needles having an enlarged head portion at one end; a pattern card carried by said driving cylinder through an operating zone; said pattern card having perforations therein according to a predetermined pattern, said perforations sized to receive therethrough end portions of said control needles; means disposed in said operating zone for displacing said control needles through both said radial bores and said pattern card perforations when said radial bores and said pattern card perforations are aligned; means for maintaining said control needles in their displaced positions during their movement through said operating zone, including means defining a guide groove disposed within said hollow center portion and stationary relative to
  • An apparatus for controlling the movement of a dobby jack lever comprising: a pivotally mounted jack lever; a rotatably mounted driving cylinder having a plu rality of radially extending blind bores positioned around the periphery thereof; a supply of control needles, each of said needles having an enlarged head portion at one end; a pattern card carried by said driving cylinder through an operating zone; said pattern card having perforations therein according to a predetermined pattern, said perforations sized to receive therethrough end portions of said control needles; supply means disposed upstream from said operating zone and positioned above the path of travel of said perforated pattern card for supplying by gravity flow said control needles into said pattern card perforations; maintaining means including said driving cylinder and the enlarged needle head portions for maintaining said control needles in said pattern card perforations during their movement through said operating zone; means responsive to said control needles during their movement through said operating zone for imparting movement to said jack lever in accordance with said predetermined pattern; a funnel disposed downstream from said
  • An apparatus according to claim 5; further including means for interrupting said magnetic field to simplify removal of said control needles.
  • control needles each have a rear contact; and wherein a safety catch is provided in each of said blind bores engageable with said rear contact.
  • said means responsive to said control needles during their movement through said operating zone includes a shaft baulk pivotally connected to said jack lever, a pair attachment hooks connected to said shaft baulk, a pair of arrester hooks pivotally mounted for engagement and disengagement with said pair of attachment hooks, a pivotally mounted segment positioned adjacent said pair of arrester hooks and having a pair of guideways therein, a pair of slide blocks each slidably positioned in one of said pair of guideways, and means for controlling the position of each of slide blocks in accordance with the position of said control needles during their movement through said operating zone.
  • said last-mentioned means includes a pair of pivotally mounted double levers; spring means independently biasing each of said double levers in a given direction; each double lever having a first arm connected to one of said slide blocks, and a second arm engageable with said control needles for pivoting said double lever in a direction oppo- 7 9 8 site to said given direction against the biasing force of FOREIGN PATENTS sald SPImg means- 382,416 10/1923 Germany;

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Credit Cards Or The Like (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Looms (AREA)
  • Air Bags (AREA)
  • Slide Fasteners (AREA)
US723366A 1967-04-27 1968-04-23 Apparatus for controlling the movement of a dobby jack lever in accordance with a pattern card Expired - Lifetime US3500873A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH605867A CH473919A (de) 1967-04-27 1967-04-27 Verfahren und Anordnung zur Schaftmaschinensteuerung

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US3500873A true US3500873A (en) 1970-03-17

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US (1) US3500873A (forum.php)
BE (1) BE714177A (forum.php)
CH (1) CH473919A (forum.php)
DE (1) DE1710199B2 (forum.php)
FR (1) FR1566870A (forum.php)
GB (1) GB1217399A (forum.php)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667507A (en) * 1969-06-25 1972-06-06 Staeubli Ag Double-lift dobby
US3667255A (en) * 1969-12-29 1972-06-06 Bassist Rudolf G Needle selection arrangement for a circular knitting machine
US3680601A (en) * 1969-06-25 1972-08-01 Staeubli Ag Improvements in or relating to draw hooks of a dobby
US5088524A (en) * 1989-10-23 1992-02-18 Khalid Omer Double left dobby
CN106012176A (zh) * 2016-07-28 2016-10-12 吴江金叶织造有限公司 一种多臂开口机构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH501073A (de) * 1968-04-02 1970-12-31 Staeubli Geb & Co Schaftmaschine
CH643606A5 (de) * 1980-02-22 1984-06-15 Staeubli Ag Ablese- und steuervorrichtung einer steuermaschine, insbesondere fachbildemaschine.
JPS61637A (ja) * 1984-06-11 1986-01-06 村田機械株式会社 ドビ−機における読取装置
EP0745712A1 (de) * 1995-05-29 1996-12-04 Stoffel & Sohn AG Nockensteuerung für eine Hochleistungs-Federrückzug-Schaftmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE382416C (de) * 1922-08-18 1923-10-02 Max Wenzel Einrichtung zur Steuerung des Schuetzenwechsels oder der Schaftmaschine fuer Webstuehle
US2712327A (en) * 1952-11-06 1955-07-05 British Cotton Ind Res Assoc Dobbies for looms
US2900837A (en) * 1956-01-14 1959-08-25 Brandt Kurt Device for the adjustment of decorative stitch stencil in automatic zig-zag sewing machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE382416C (de) * 1922-08-18 1923-10-02 Max Wenzel Einrichtung zur Steuerung des Schuetzenwechsels oder der Schaftmaschine fuer Webstuehle
US2712327A (en) * 1952-11-06 1955-07-05 British Cotton Ind Res Assoc Dobbies for looms
US2900837A (en) * 1956-01-14 1959-08-25 Brandt Kurt Device for the adjustment of decorative stitch stencil in automatic zig-zag sewing machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667507A (en) * 1969-06-25 1972-06-06 Staeubli Ag Double-lift dobby
US3680601A (en) * 1969-06-25 1972-08-01 Staeubli Ag Improvements in or relating to draw hooks of a dobby
US3667255A (en) * 1969-12-29 1972-06-06 Bassist Rudolf G Needle selection arrangement for a circular knitting machine
US5088524A (en) * 1989-10-23 1992-02-18 Khalid Omer Double left dobby
CN106012176A (zh) * 2016-07-28 2016-10-12 吴江金叶织造有限公司 一种多臂开口机构

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Publication number Publication date
BE714177A (forum.php) 1968-10-25
CH473919A (de) 1969-06-15
DE1710199A1 (de) 1971-10-14
FR1566870A (forum.php) 1969-05-09
DE1710199B2 (de) 1977-06-08
GB1217399A (en) 1970-12-31

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