US3612108A - Method and dobby for weaving mixed weave fabrics - Google Patents

Method and dobby for weaving mixed weave fabrics Download PDF

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Publication number
US3612108A
US3612108A US813888A US3612108DA US3612108A US 3612108 A US3612108 A US 3612108A US 813888 A US813888 A US 813888A US 3612108D A US3612108D A US 3612108DA US 3612108 A US3612108 A US 3612108A
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United States
Prior art keywords
heald
lever
shed position
rocking device
movement
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Expired - Lifetime
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US813888A
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English (en)
Inventor
Rudolf Schwarz
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Staeubli AG
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Staeubli AG
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/10—Centre-shed dobbies, i.e. shed formed by lifting some threads and lowering the others from central shed-closed position

Definitions

  • PATENTEDHBH 219m sum user 1o INVENTOK PATENTEnncnzlsn 3,612,108
  • PATENTEDucnzmn 3612108 sum user 10 I Fig. /0
  • This invention relates to a method and a dobby with a rocking device for controlling the movement of standard frames for the manufacture of mixed weave fabrics with leno weave and normal weave, with dobby or jacquard machines, where both return spring and double lift dobbies are used, in the latter, however, without positive control of the standard frames.
  • the object of the invention is an impact-free transfer of the standard frames from their movement produced by the rocking device as far as the half shed, or slightly above it, into the shaft movement produced by the normal shaft control mechanism of the dobby, for reaching the upper shed as well as the impact-free taking over of the movement of the standard frames by the rocking device when the vertical shafts are descending from the upper shed into the lower shed.
  • This object is achieved with the method according to the invention, which is distinguished in that the transfer of the movement of the standard frame, which is produced by the rocking device, to the movement of this shaft for reaching the upper shed occurs without impact.
  • the drive can consist of toggle levers, sliding wedges or swinging cam disks.
  • FIG. 1 is a diagram of the shaft movements on transferring from leno weave to normal weave in a dobby with a rocking device;
  • FIG. 2 is the same diagram of a dobby according to the invention.
  • FIGS. 3-6 are a diagrammatic illustration of a dobby with a rocking device for the standard frame as well as a lever device according to the invention given as an example with a wedge in four different positions according to the diagram;
  • FIGS. 7-10 are a modification according to FIGS. 3-6, the wedge being replaced by a cam disk;
  • F l0. 11 is the diagrammatic construction of a further modification with a toggle lever.
  • FIG. 2 shows that in the dobby according to the invention the point M, has been moved to the ascending branch of the trajectory of the vertical shaft s', which gives a continuous shaft movement.
  • This shifting of the transfer of movement from one control mechanism to the other mechanism has no effect on the weave, however it allows more even running of the machine despite an increased operating speed.
  • the shaft operating mechanism for normal weave-known under the name of the Hattersley System consists of the drawknives 2, which swing to and fro about the driving shaft 1, which depending on the control according to the pattern take along the draw hooks 3.
  • the latter are attached to the ends of the baulk 4, on which in the center thereof engages the swing pivotal shaft 6 mounted on the lever 5.
  • the rocking device for standard frames illustrated in FIG. 3 is composed of the cam 9, which rotates with the cam shaft 10 and on which the roller 11 of the rod 12 slides.
  • the movement produced by the cam 9 is imparted to the heald frame 8 by means of the two-armed tilting lever 13 and the traction rod or traction cable 14, and a return spring 15 is provided.
  • the lever device l6-18 there belong only the connecting parts between the shaft operating mechanism for normal weave 1-7 and the rocking device 9- 13, Le. the rod 16, which is attached to the swing lever 6, as well as the wedge 17 attached to it, which slides on the surface 18.
  • the follower 19 of the rod 12 is constructed as a roller.
  • FIGS. 3-6 show momentary situations, from which there can be seen the cooperation of the rocking device, of the normal shaft operating mechanism and of the lever device for taking over the control of the movement of the heald frame from the device to the mechanism. All the parts shown are associated with the standard frame 8 corresponding to the curves S, S and S. The curves N, and N, belong to two different heald frames, which have their own control and operating parts. In the diagrams of FIGS. 1 and 2 there are shown the positions which correspond to the individual momentary situations of FIGS. 3-6.
  • FIG. 3 shows the position of the moving parts during the crossing of the shed, i.e. the drawknives 2 are located in their central position of the swinging movement. However, since a pure leno weave is being undertaken, there are no drawhooks 3 attached to the drawknives 2.
  • the heald frame 8 has been raised into the half shed position by the rocking device and has covered approximately 60-70 percent of the total movement.
  • FIG. 4 shows the position of the moving parts at the moment of the insertion of the pick, preparations already having been made for transferring from leno weave to normal weave for the next pick.
  • FIG. shows the position of the moving parts at the moment of the taking over of the control of the movement of the standard frame from the rocking device 9-13 by the operating mechanism 1-7 of the dobby by means of the lever device 16-19.
  • the upper drawknives 2 move in the direction of the arrow and by means of the drawhook 3 and the baulk 4 carries along the swing lever 6.
  • the latter by means of the rod 16 pushes the wedge 17 under the follower 19.
  • FIG. 6 shows, the position of the moving parts at the moment of the insertion of the pick for a normal weave, i.e. the standard frame has been raised into the upper shed by the operating mechanism of the dobby 1-7 and by means of the rod 16, the wedge 17, the tilting lever 13 and the traction rod 14.
  • the cam 9 of the rocking device no longer affects the position and movement of the shaft 8.
  • FIGS. 7 to a variation is shown, once more in four different positions, with regard to FIG. 2 the positions in FIGS. 7 to 10 corresponding to the positions in FIGS. 3'to 6. Exactly corresponding parts of the two variations have the same reference numerals.
  • the known shaft operating mechanism for normal weave consists of the drawknives 2, which swing to and fro about the driving shaft 1, and the drawhooks 3 controlled according to the pattern, which are attached to the baulk 4.
  • the rod 26 At the end of the swing lever 6, which is supported on the bearing 5, the rod 26 is attached.
  • the cam disk 27 On the shaft 28 there is pivoted the cam disk 27, which comes into contact with the roller 29.
  • the known rocking device for standard frames consists of the cam 9, which rotates continuously with the cam 10 and thus imparts its tilting motion to the arm 22 of the three-armed tilting lever 23 together with the return spring 15. This tilting motion is transmitted through the traction cable 14, as in FIG. 3, to the standard frame 8.
  • FIG. 7 shows the position at the crossing of the shed, where the dobby controls a purely leno weave.
  • the drawknives 2 are not carrying along the drawhooks. Only the rocking device 9, I0, 23 with the traction cable 14 and the spring are acting on the heald frame 8.
  • FIG. 8 illustrates the moment of the initiation of the movement.
  • the upper drawhook 3 has been controlled according to the pattern for attaching on the drawknife 2.
  • FIG. 9 shows how the follower 29 which is lying on the cam disk 27 is raised, by means of which there occurs an increase of the swinging movement of the tilting lever 23. The arm 22 then no longer lies on the cam 9 (FIG. 10).
  • FIG. 11 shows a further embodiment of the lever device 36, which is attached to the shaft operating mechanism l-7 for normal weave and which acts on a moving part 33, 14 between the rocking device 9, 10, 32, 33 and the heald frame 8. All the parts identical to the first two embodiments have the same reference numeral.
  • the rod 36 which has a fork 37 at its upper end.
  • the joint 39 of the toggle lever 40 In this fork there is arranged the joint 39 of the toggle lever 40, the two ends of the toggle lever being attached to the shaft 38 and to the. double lever 33 respectively.
  • the joint 39 slides up and down in the fork 37 without effecting the movement of the standard frame.
  • the swing lever 6 produces a lifting of the fork, which transmits its movement to the double lever 33 by means of the joint 39 and the toggle lever 40. There thus occurs the taking over of the movement of the standard frame from the rocking device by the shaft operating mechanism.
  • the rod 36 can act directly, or with the interposition of a further lever, on the traction cable 14, in that the lever device widens the traction cable out from being straight e.g. between the double lever 33 and the heald frame 8.
  • the lever device according to the invention also has the advantage that only one traction rod leads to the heald frame and that the two mechanisms are as near as possible to the heald frame for working, i.e. to the tilting lever 13 or 23 or 33 or direct on the drawhook or driving shaft.
  • the arrangement is very simple in its entire construction, and it combines only known and tried mechanisms. It allows a considerable increase in the operating speed to be achieved.
  • a method of operating a loom having heald frames operable to three operating positions comprising a lower shed position, an upper shed position for effecting a normal weave and a half shed position intermediate the lower shed position and upper shed position for effecting a leno weave and heald levers operable to three positions corresponding to respective ones of the three operating positions of a respective one of said heald frames, the loom having a first operating mechanism and a second mechanism for alternately operating a given heald frame for weaving mixed fabrics, said method comprising actuating the heald lever with the first operating mechanism from a first position corresponding to said lower shed position of said heald frame to a second position corresponding to the half shed position of said heald frame, disengaging the heald lever from the first operating mechanism with said second operating mechanism without interruption of movement of said heald lever and continuing uninterrupted, smooth movement of said heald lever to a third position corresponding to said upper shed position of said heald frame, returning the heald lever from its third position to its second position under control of the second operating mechanism, engaging the heald
  • a heald frame operable from a lower shed position, to an upper shed position and an intermediate half shed position
  • a heald lever actuating the heald frame from said lower shed position to said half shed position and to said upper shed position and returning it to said lower shed position
  • a rocking device cooperative with said heald shaft actuating said heald lever to move the heald frame from the lower shed position to the half shed position and back to the lower shed position
  • a second drive mechanism having transfer means effective to render ineffective actuation of said heald lever by said rocking device and smoothly transfer actuation of said heald lever by said second drive mechanism without interruption of movement of said heald lever to effect movement of the heald frame from said half shed position to said upper shed position under control of said second drive mechanism and for returning control of the movement of the heald lever and heald frame to said rocking device when the heald frame is moved between said intermediate shed position and lower shed position.
  • said second drive mechanism transfer means comprises a driven element driven selectively cooperating with said rocking device uncoupling said heald lever from the rocking device and recoupling it therewith smoothly without interruption of movement of said heald lever.
  • said transfer means is disposed spaced from said path of travel of the heald lever and includes means for selectively moving said driven element into said path of travel and out of said path of travel, said driven element having means thereon to move the heald lever along its path of travel between positions corresponding to the half shed and upper shed positions of the heald frame.
  • said element comprises a reciprocably driven wedge insertable selectively into the rocking device to uncouple and couple the heald lever to said rocking device.
  • said driven element comprises a cam
  • said means thereon comprises a camming surface
  • said cam comprises a wedge-shaped cam and said camming surface thereon comprises an inclined camming surface controlling actuation and travel of said heald lever.
  • said rocking device comprises a cam follower connected to said heald lever and coupling the heald lever to said rocking device
  • said transfer means comprises means engaging said cam in said transfer means to said cam follower transferring control of the heald lever between the rocking device and the second drive mechanism.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US813888A 1968-04-08 1969-04-07 Method and dobby for weaving mixed weave fabrics Expired - Lifetime US3612108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH521768A CH490539A (de) 1968-04-08 1968-04-08 Verfahren und Schaftmaschine mit Wippvorrichtung zum Weben von Gemischtbindungsgeweben mit Dreher- und Normalbindung

Publications (1)

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US3612108A true US3612108A (en) 1971-10-12

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US813888A Expired - Lifetime US3612108A (en) 1968-04-08 1969-04-07 Method and dobby for weaving mixed weave fabrics

Country Status (6)

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US (1) US3612108A (xx)
JP (1) JPS5128745B1 (xx)
BE (1) BE730909A (xx)
CH (1) CH490539A (xx)
FR (1) FR2005766A1 (xx)
GB (1) GB1267081A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5131436A (en) * 1990-06-15 1992-07-21 Staubli & Trumpelt Gmbh Maschinenfabrik Mid closing dobby
US20030226609A1 (en) * 2002-06-06 2003-12-11 Sultex Ag Apparatus for the manufacture of leno cloths
US20090139580A1 (en) * 2007-11-21 2009-06-04 Groz-Beckert Kg Apparatus for the production of leno fabric
US20220307163A1 (en) * 2021-03-24 2022-09-29 Staubli Faverges Pulling mechanism for controlling the heald frames of a loom and loom comprising such a mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343377B3 (de) † 2003-09-17 2005-04-28 Groz Beckert Kg Schaftantrieb für Webmaschinenschäfte

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US386477A (en) * 1888-07-24 Field
US890612A (en) * 1906-09-12 1908-06-16 George S Cox And Brother Haircloth-loom.
US1543045A (en) * 1924-01-14 1925-06-23 Bachman John Snelgrow Leno loom
US1719911A (en) * 1928-05-25 1929-07-09 Elmer J Tetreault Leno jumper attachment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US386477A (en) * 1888-07-24 Field
US890612A (en) * 1906-09-12 1908-06-16 George S Cox And Brother Haircloth-loom.
US1543045A (en) * 1924-01-14 1925-06-23 Bachman John Snelgrow Leno loom
US1719911A (en) * 1928-05-25 1929-07-09 Elmer J Tetreault Leno jumper attachment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5131436A (en) * 1990-06-15 1992-07-21 Staubli & Trumpelt Gmbh Maschinenfabrik Mid closing dobby
US20030226609A1 (en) * 2002-06-06 2003-12-11 Sultex Ag Apparatus for the manufacture of leno cloths
US20090139580A1 (en) * 2007-11-21 2009-06-04 Groz-Beckert Kg Apparatus for the production of leno fabric
US7918249B2 (en) * 2007-11-21 2011-04-05 Groz-Beckert Kg Apparatus for the production of leno fabric
US20220307163A1 (en) * 2021-03-24 2022-09-29 Staubli Faverges Pulling mechanism for controlling the heald frames of a loom and loom comprising such a mechanism
US11713521B2 (en) * 2021-03-24 2023-08-01 Staubli Faverges Pulling mechanism for controlling the heald frames of a loom and loom comprising such a mechanism

Also Published As

Publication number Publication date
DE1910040A1 (de) 1969-10-23
BE730909A (xx) 1969-10-02
GB1267081A (xx) 1972-03-15
FR2005766A1 (xx) 1969-12-19
JPS5128745B1 (xx) 1976-08-20
DE1910040B2 (de) 1973-01-25
CH490539A (de) 1970-05-15

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