US3782423A - Arrangement for braking the picker stick of a loom - Google Patents

Arrangement for braking the picker stick of a loom Download PDF

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Publication number
US3782423A
US3782423A US00279395A US3782423DA US3782423A US 3782423 A US3782423 A US 3782423A US 00279395 A US00279395 A US 00279395A US 3782423D A US3782423D A US 3782423DA US 3782423 A US3782423 A US 3782423A
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US
United States
Prior art keywords
stop
picker stick
braking
free end
arrangement
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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
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US00279395A
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English (en)
Inventor
F Lutz
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.)
Ruti Machinery Works Ltd
Maschinenfabrik Rueti AG
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Maschinenfabrik Rueti AG
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Filing date
Publication date
Application filed by Maschinenfabrik Rueti AG filed Critical Maschinenfabrik Rueti AG
Application granted granted Critical
Publication of US3782423A publication Critical patent/US3782423A/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
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/24—Mechanisms for inserting shuttle in shed
    • D03D49/26—Picking mechanisms, e.g. for propelling gripper shuttles or dummy shuttles
    • D03D49/38—Picking sticks; Arresting means therefor

Definitions

  • the present invention relates to an arrangement for braking a picker stick of a 100m which comprises an I 58] Fie'ld 6 167 168 elastic element which is compressed upon the braking ,l39/,l6l S, of the picker Stick.
  • the object of the present invention is to avoid these disadvantages.
  • the invention is characterized by the fact that a second elastic elment of plate-like shape at one of two opposite end parts rests against a fixed stop and at its other end it bears the elastic first element, and that the second element is imparted elastic deflec'- tion by the forces occurring upon the compression of said elastic first element.
  • the arrangement of the invention accordingly has the advantages that a hard blow cannot occur since the elastic first element is so arranged on the second element that it yields and therefore cannot be overstressed. Destruction of the elastic first element by the picker stick is thus avoided.
  • the force for the braking of the picker stick can furthermore be imparted a characteristic favorable for the existing conditions by a suitable shaping and selection of the material of the two elements and of the stop.
  • the progressively increasing braking force desired can be obtained in this arrangement, which in order to reduce the noise formed should be weak at the start.
  • the arrangement is furthermore characterized by great simplicity and permits optimum utilization of the space available.
  • it has the advantage that said first element accurately retains the position which has been given to it even after a lengthy time of operation.
  • FIG. 1 is a view of an arrangement for the braking of a picker stick, and of its position on the loom, seen from the front, and
  • FIG. 2 is a view of a second embodiment of a braking device.
  • shuttle 11 is propelled by a picker stick 12 from right to left along the lay beam 13. After the shuttle 11 which comes from the left has struck the picker or the picker stick 12, the latter is held and braked by the bumper 14. Conversely, when, by actuation of the lug strap 15, the picker stick 12 is moved to the left in order to drive the shuttle 11, it is again brought to a standstill by a braking arrangement 20.
  • the braking arrangement consists of an elastic first element 21 of U-shaped construction whose outer surface is provided with a piece of leather 22 in order to protect it against wear.
  • a second element 23, which may be plate-shaped-in constructiom has its one end 28 fastened by the bolt 26 to the stationary stop 24.
  • the first element 21 is operatively connected to the free end 29 of the second element 23.
  • the second element 23 also consists of elastic material and has the shape of an elongated plate which'extends in the vertical direction from its attachment to stop 26 and has operatively connected to it the first element 21 in the form of an upright U.
  • the shuttle 11 coming from the left strikes the picker of the picker stick 12. In this way the latter is knocked against the bumper 14 and braked by the latter, whereby the shuttle 1 1 is also braked.
  • the picker stick 12 Upon the reverse process, ie upon the driving of the shuttle 11 towards the left, the picker stick 12 is moved vigorously towards the left by means of the lug strap 15. After the shuttle 11 has thereby been brought to the desired speed, the picker stick 12 is again brought to a stop by striking against the braking arrangement 20.
  • FIG. 2 differs from that shown in the braking arrangement of FIG. 1 by the fact that the stop 25 (designated 24 in FIG. 1) extends towards the other free end 29 of the second element 23, and that the surface 27 facing surface 30 of element 23 is curved upwardly and outwardly therefrom.
  • the adjacent faces30 and 27 of the element 23 and stop25, respectively, thus move away from each other.
  • the second element 23, upon the braking of the picker stick 12, comes to rest with an increasing area of contact of its surface 30 against the surface 27 and is thus buffered by varying amounts as the adjacent faces progressively contact each other. It is clear that with an increasing deflection of the element 23, the lever arm which this element 23 forms becomes shorter. The braking or stopping force increases corresponding to this shortening.
  • the second element 23 is elastically stressed in its entirety, while in the embodiment shown in FIG. 1, the elastic deformations are concentrated in the region of flexure which is formed or located at the height of the upper end of the stop 24.
  • the second element 23 it also lies within the scope of the present invention for the second element 23 to be rigid and to be pressed, for instance, by a tension spring arranged at the place of the bolt 26 against the surface 27 so that upon impact of the picket stick, it rolls along the surface 27.
  • the embodiment shown in FIG. 2 has the following advantages over this:
  • a spring results in a higher storage of energy than in the case of a piece of elastic material.
  • a piece of elastic material is used for the second element 23, a weaker rebound of the picker stick 12 is thus obtained.
  • the picker stick l2 participates in the movement of the lay and the braking arrangement 20 when it acts as bumper is fastened to a stationary part of the machine, the first element 21 must move togetherw'ith the picker stick 12 for the interval of time during which the picker stick l2 and the first element 21 are in mutual contact. This can take place much more easily if the second element 23 consists of a piece of elastic material.
  • the second element 23 is elastic and of curved shape also lies within the scope of the present invention.
  • the plate-shaped second element 23 is developed curved away from the stop 25; thus in FIG. 2 it would be curved to the right.
  • the surface 27, on the other hand, can be made flat and vertical.
  • the brake arrangement in accordance with the invention can also be used instead of the bumper 14, Le, it can also be used for the braking of the shuttle 11 when it has come from the left and has struck the picker or the picker stick 12 (see FIG. 1).
  • Arrangement for braking of a picker stick of a loom which comprises a first element compressible by bending upon the braking of the picker stick; an elongated second element bendable by deflection, said second element having its one end connected to a fixed stop and its other end free and connected to and carrying said first element; said second element providing an elastic bendable deflection of its free end due to the forces applied to said free end by the compression of said first element by said picker stick.
  • said second element consists of an elongated piece of elastic material and that the surface of said stop which is adjacent to the surface of said second element is curved away from the free end of said second element, the adjacent surface of said second element being pressed by varying amounts against said curved surface of said stop by the forces applied to said first element.
  • said first element is made of an elastic material and is of U- shaped construction and that it is in the shape of an upright U operatively connected to said free end of said second element.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00279395A 1971-08-31 1972-08-10 Arrangement for braking the picker stick of a loom Expired - Lifetime US3782423A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1275371A CH534754A (de) 1971-08-31 1971-08-31 Anordnung zum Bremsen einer Peitsche einer Webmaschine

Publications (1)

Publication Number Publication Date
US3782423A true US3782423A (en) 1974-01-01

Family

ID=4386079

Family Applications (1)

Application Number Title Priority Date Filing Date
US00279395A Expired - Lifetime US3782423A (en) 1971-08-31 1972-08-10 Arrangement for braking the picker stick of a loom

Country Status (5)

Country Link
US (1) US3782423A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5125865B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE788155A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH534754A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT964377B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021383A (en) * 1975-12-22 1977-05-03 Texaco Development Corporation Infused polymer containing monohydric compounds and polyurethane compositions based thereon
US4021384A (en) * 1975-12-22 1977-05-03 Texaco Development Corporation Infused polymer containing polyols and polyurethane compositions based thereon

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US798860A (en) * 1905-03-08 1905-09-05 Alexander Allen Jr Bunter for loom picker-sticks.
US973132A (en) * 1909-10-01 1910-10-18 William F Draper Cushioning-stop for picker-sticks.
GB191123467A (en) * 1911-10-24 1912-06-06 Charles Tempest Walker An Improved Buffer for Checking the Picking-sticks of Underpick Looms.
US2972360A (en) * 1956-08-22 1961-02-21 Mobay Chemical Corp Buffer stop for power looms
US3005471A (en) * 1957-02-21 1961-10-24 Mobay Chemical Corp Buffer for power looms
CH414492A (de) * 1964-02-24 1966-05-31 Heinrich Pickhardt & Co Prellbockgarnitur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4912865U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-05-10 1974-02-02

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US798860A (en) * 1905-03-08 1905-09-05 Alexander Allen Jr Bunter for loom picker-sticks.
US973132A (en) * 1909-10-01 1910-10-18 William F Draper Cushioning-stop for picker-sticks.
GB191123467A (en) * 1911-10-24 1912-06-06 Charles Tempest Walker An Improved Buffer for Checking the Picking-sticks of Underpick Looms.
US2972360A (en) * 1956-08-22 1961-02-21 Mobay Chemical Corp Buffer stop for power looms
US3005471A (en) * 1957-02-21 1961-10-24 Mobay Chemical Corp Buffer for power looms
CH414492A (de) * 1964-02-24 1966-05-31 Heinrich Pickhardt & Co Prellbockgarnitur

Also Published As

Publication number Publication date
JPS4833154A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-05-08
CH534754A (de) 1973-03-15
BE788155A (fr) 1972-12-18
IT964377B (it) 1974-01-21
JPS5125865B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-08-03

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