US3554238A - Dobbies - Google Patents

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Publication number
US3554238A
US3554238A US723527A US3554238DA US3554238A US 3554238 A US3554238 A US 3554238A US 723527 A US723527 A US 723527A US 3554238D A US3554238D A US 3554238DA US 3554238 A US3554238 A US 3554238A
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US
United States
Prior art keywords
needle
pattern card
reading
movement
holder
Prior art date
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
Application number
US723527A
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English (en)
Inventor
Ernst Hoening
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Staeubli AG
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Staeubli AG
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Filing date
Publication date
Application filed by Staeubli AG filed Critical Staeubli AG
Application granted granted Critical
Publication of US3554238A publication Critical patent/US3554238A/en
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Classifications

    • 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

  • ABSTRACT A dobby in which the reading needles are actu- [l] Int-Cl D03c l/00, med into reading position f a f t d pattern card by a D039 /00 first system that applies a low value driving force to the nee- [50] Fleld of Search 139/68, 66, dles so that the pattern card is not damaged if a f ti is 74v 71 not sensed by the needles as would be the case if too strong a force were applied to the reading needle.
  • the reading needles must be brought into contact with the pattern cards with as little force as possible.
  • the movement of the heald shafts which is carried out as quickly as possible, requires great effort which is exerted by specific traction or impact means.
  • the transmission of sensed control commands until the shaftreaches the desired position creates the possibility of 'error, and on the other hand requires the exact cooperation of the individual elements, an inclusion of safety periods and additional safety precautions.
  • the many intermediate elements increase the sluggishness of the operating sequence. With every additionally inserted element there'occurs wear and tear at the points. of contact due to absorption of the necessary play and the reciprocal movement of the elements.
  • the object of the invention is a most direct transmission of the reading action for controlling the heald shafts, and retention of the sensitivity during reading and retention of the strong action'of force at the beginning of the movement of the heald shafts.
  • a dobby with at least one needle which reads a perforated pattern card is characterized according to the invention by two driving systems which apply force directly and sequentially to the needle or its holder.
  • the first system works with a low force, brings about the reading of the pattern card by means of the needle, and when there is a slight drop of the needle into a perforation of the pattern card, the needle or holder reaches therange of action of the second driving system, which works with greater force.
  • the second system continues insertion of. the needle and drops it deeper into the perforation of the pattern card, the operative movement obtained in this way serving for the direct or indirect control of the movement of the shaft.
  • FIG. 1 is a diagrammatic view of a shaft control mechanism with a baulk and direct exertionof force by the needle holder on the draw-hooks.
  • FIGS. 2-4 are diagrammatic views of a control and actuation mechanism of a draw-hook in a dobby ofthe Hattersley type illustrated in threedifferent positions.
  • FIG. 5 is a diagrammatic view of a modification of the needle holder'with a pivoted drive.
  • FIGS. 6 and 7 are diagrammatic views of modifications of the needle holder with a drive which moves in a straight line, in two different Positions.
  • FIGS. 8 and 9 are diagrammatic views of a further modification of the needle holder with a drive which moves in a straigh line, in two different positions.
  • a jack-lever 2 which is mounted to rotate on the stationary pivot pin 3, and which by means of a pull member 4 raises the heald shaft, not shown, into the high position, or allows it to sink into the low position in spring retraction machinesrAt each end of the baulk 1 there is attached a pull rod 20,
  • the pins 6 of these pull rods each engage in a slot 7, 7 of the needle holder which carries the reading needle 5.
  • the needle holder 21. is
  • Thedobby comprises stationary impact bars 11 for the ends of the baulk 1.
  • a beginning is made at its initial position. as shown in FIG. I for the pull rod 20 and its associated parts.
  • the double lever 26' begins its swinging movement in a counterclockwise direction.
  • the arm 26a releases a cam 27' so that the needle holder 21 is guidedunder the action of a weak spring 28' with its needle 5' against the pattern card 13 and probes lightly for a perforation. If there is no hole beneath theneedle, then the needle rests on the pattern card.
  • the needle movement-or the movement of the needle holder 21 is brought about by a double lever 26 which swings to and fro on thestationary pivot pin 25, and ismoved by an arm 9, which rolls over a continuously rotating cam23.
  • the two arms 26a, 26b of the double lever 26 cooperate If there is a hole in the pattern card beneath the needle 5, then the needle holder sinks in further until the base of the slot 7 contacts the pin 6. For further movement of the needle holder, the force of the spring 28 is no longer sufficient. This short additional movement is sufficient, however, to bring the stop face 27b in front of the arm 26b, sothat when the double lever 26 swings further it entrains the cam and also the needle holder as far as the position of the holder 21 shown in FIG. 1.
  • FIGS. 2-4 part of a dobby of the I-Iattersley type is shown diagrammatically.
  • the following parts are shown and some have reference numerals corresponding to similar parts of the embodiment in FIG. 1:
  • An upper draw-hook 30, which is attached to one end of a baulk 1, a rocker arm 2, a bar 11 and a draw-blade 14 which swings to and fro in, an approximately straight line.
  • the control of the position of the-draw hook takes place with respect to the draw-blade of an arrange,- ment according to the invention, as shown, e.g., inFIG. l and as described.
  • FIG. 2 shows the initial position, in which the drawrhook 30.does. not lie within the range of the draw-blade 14, i.e.,' the reading needle 5 is lifted and has just read the pattern card and ascertained. that;
  • FIG. 3 shows thereading of a holeinthe pattern card 13 by the reading needle 5 andFIGA shows the situation in which the draw-hook 30 is in contact with the draw-blade 14, so that the latter can. draw the heald. shaft intothe highposition. during its swinging movement.
  • a needle holder 31 with the reading needle 5 liesinguides 34 so that itcanslideendwise with the rack 8 as a limitfor lateral movement.
  • a compression spring 38 which. is sup: ported on the block 16, serves for exerting the first low-force for reading.
  • a support lever 32 which can swing about a shaft 17 away from a rail 19 against the force of the spring 18, remains unaffected, i.e., it has lifted the draw-hook 30 so that it is not entrained by the blade 14.
  • a rod 33 serves for effecting the swing drive of the double lever.
  • H0. 5 shows a modification of the needle holder in the initial position with its driving systems. Parts have reference numerals corresponding to those of similar parts in the embodiments described. It shows: the cylinder or drum 12 with the pattern card 13, the reading needle 5, a needle holder 41, guides 44, a rack 8, and a weak compression spring 48, the block 16, a double lever 46 with a pivot point 45 and the arms 46a and 46b and a prolongation 49.
  • the functional operation is the same as in the previously described examples, however two stop faces 47a and 47b are disposed on two earns 47.
  • the arm 460 with the stop face 47a serves for relieving the holder and for the release for reading as well as for the positive return impact of the holder.
  • the arm 46b with the stop face 47b serves for the pushing movement and the connected control movement of the shaft lever.
  • FIGS. 6 and 7 and FlGS. 8 and 9 which each have the same holder in the initial position and the extended position.
  • the path of movement of the needle holder 51 is determined by guides 54 and 54a and the rack 8. The entire arrangement is completed by the reading needle 5, the compression spring 58 with the block 16 and the cylinder 12 with the pattern car 13.
  • An arrow C indicates the direction of movement in a straight line of a blade 56 having a lower face 56b.
  • a holder 51 follows under the force of the springs 58. If the reading needle does not find a perforation, then the holder and its needle remain stationary. If the reading needle does find a perforation, then the holder 51 sinks further.
  • the guide 540 tilts the plate bar 57 at the pivot point D, so that a stop face 57b comes to lie in front of the blade 56.
  • a known-snap action amplifier 53 is arranged, consisting of two cups and a spring.
  • tion 59 is used in a known way for the transmission of the movement of the needle holder to the actuating elements of the heald shaft.
  • the needle holder 61 carries out a lateral movement of an amount indicated by E with respect to its axis of movement, owing to the offsets 63 of the-lateral guide edges. In the initial position these offsets are near to the guides 64. At the same time as the lateral movement, the holder engages with its notch 67 over the blade 66, so that the latter now positively controls the movement of the holder.
  • a stop face 670 for the return of the holder to the initial position, and a stop face 67b for the extending movement are provided.
  • the heald shafts can be directly attached to the holder, i.e., no connection by way of pull rods or draw-hooks and baulk is necessary.
  • a dobby with at least one needle for reading a perforated pattern card comprising, two driving means applying force to the reading needle sequentially, a first one of said means having means to apply a low value force to initiate the reading of the pattern card by the reading needle and initiate entry of said needle into a perforation, and a second means effective to apply force to the reading needle to continue insertion of said needle into a perforation when there is a slight movement of the needle into a perforation of the pattern card, the second driving means having means comprising a positively driven lever mechanism applying a greater force than the force of the first system to move the needle deeper into the perforation of the pattern card, a needle holder, said lever mechanism com prising a double lever having first and second lever arms driven so that it swings to and fro, a cam on the needle holder, the cam and lever arms being so arranged that the first arm, during the movement of the double lever away from the pattern card lifts the needle out and away from the pattern card against the force of the weaker first means, and during

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
US723527A 1967-04-25 1968-04-23 Dobbies Expired - Lifetime US3554238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH590667A CH498218A (de) 1967-04-25 1967-04-25 Verfahren zum Ablesen einer gelochten Musterkarte und zum Betätigen der Schaftbewegungsorgane einer Schaftmaschine, sowie Schaftmaschine zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
US3554238A true US3554238A (en) 1971-01-12

Family

ID=4301303

Family Applications (1)

Application Number Title Priority Date Filing Date
US723527A Expired - Lifetime US3554238A (en) 1967-04-25 1968-04-23 Dobbies

Country Status (5)

Country Link
US (1) US3554238A (de)
CH (1) CH498218A (de)
DE (1) DE1710198B1 (de)
FR (1) FR1585404A (de)
GB (1) GB1217032A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680601A (en) * 1969-06-25 1972-08-01 Staeubli Ag Improvements in or relating to draw hooks of a dobby
US3724511A (en) * 1970-05-29 1973-04-03 Staeubli Ag Device for controlling a wedge coupling, particularly in a dobby
US3724510A (en) * 1970-05-29 1973-04-03 Staeubli Ag A dobby
US3726324A (en) * 1969-11-13 1973-04-10 S Xaus Dobby machines
US3730232A (en) * 1970-05-29 1973-05-01 Staeubli Ag Dobby with a device for moving all heald frame into the same position
US4137951A (en) * 1976-03-31 1979-02-06 Kazurov Alexandr A Apparatus for controlling actuating mechanism of loom dobby

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH522057A (de) * 1970-05-29 1972-04-30 Staeubli Ag Einrichtung an einer Schaftmaschine mit Antriebswelle und darauf gelagertem Exzenterring, zum Blockieren im Stillstand oder Sichern eines Keiles beim Kuppeln des Exzenterringes mit der Antriebswelle oder der Kurbelstange

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2085459A (en) * 1935-08-03 1937-06-29 Saurer Ag Adolph Pattern mechanism for looms and the like
US2431597A (en) * 1944-01-18 1947-11-25 Saurer Ag Adolph Double-lift open-shed dobby
US2856965A (en) * 1957-02-20 1958-10-21 Edwin F Dolbeare Guard for dobby pattern cylinder
US2926703A (en) * 1960-03-01 Controlling device
US3171445A (en) * 1962-09-12 1965-03-02 Rueti Ag Maschf Feeler needle mechanism for exploring pattern cards of looms
GB1008665A (en) * 1961-11-03 1965-11-03 Rueti Ag Maschf Improvements in or relating to looms

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT231370B (de) * 1961-11-07 1964-01-27 Rueti Ag Maschf Vorrichtung zum Abtasten einer Musterkarte
AT232933B (de) * 1962-09-14 1964-04-10 Rueti Ag Maschf Tastnadelapparat zum mustergemäßen Bewegen der Webschäfte

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926703A (en) * 1960-03-01 Controlling device
US2085459A (en) * 1935-08-03 1937-06-29 Saurer Ag Adolph Pattern mechanism for looms and the like
US2431597A (en) * 1944-01-18 1947-11-25 Saurer Ag Adolph Double-lift open-shed dobby
US2856965A (en) * 1957-02-20 1958-10-21 Edwin F Dolbeare Guard for dobby pattern cylinder
GB1008665A (en) * 1961-11-03 1965-11-03 Rueti Ag Maschf Improvements in or relating to looms
US3171445A (en) * 1962-09-12 1965-03-02 Rueti Ag Maschf Feeler needle mechanism for exploring pattern cards of looms

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680601A (en) * 1969-06-25 1972-08-01 Staeubli Ag Improvements in or relating to draw hooks of a dobby
US3726324A (en) * 1969-11-13 1973-04-10 S Xaus Dobby machines
US3724511A (en) * 1970-05-29 1973-04-03 Staeubli Ag Device for controlling a wedge coupling, particularly in a dobby
US3724510A (en) * 1970-05-29 1973-04-03 Staeubli Ag A dobby
US3730232A (en) * 1970-05-29 1973-05-01 Staeubli Ag Dobby with a device for moving all heald frame into the same position
US4137951A (en) * 1976-03-31 1979-02-06 Kazurov Alexandr A Apparatus for controlling actuating mechanism of loom dobby

Also Published As

Publication number Publication date
CH498218A (de) 1970-10-31
FR1585404A (de) 1970-01-23
DE1710198B1 (de) 1972-06-08
GB1217032A (en) 1970-12-23

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