US3875767A - Oscillation suppressing knitting needle - Google Patents

Oscillation suppressing knitting needle Download PDF

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Publication number
US3875767A
US3875767A US315162A US31516272A US3875767A US 3875767 A US3875767 A US 3875767A US 315162 A US315162 A US 315162A US 31516272 A US31516272 A US 31516272A US 3875767 A US3875767 A US 3875767A
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US
United States
Prior art keywords
shank
slanted
butt
shank portion
predetermined height
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Expired - Lifetime
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US315162A
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English (en)
Inventor
Jaroslav Kopal
Vladimir Zid
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Statni Vyzkumny Ustav Textilni
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Statni Vyzkumny Ustav Textilni
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Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/04—Latch needles

Definitions

  • the present invention relates to an improvement of a latch needle of the type used in knitting machines.
  • the developing of the resonance effect can be prevented by several measures. for example by braking the needle movement, which is disadvantageous for high speed knitting machines. and furthermore by producing sections in the needle which differ by mechanical and physical properties from each other. which may be effected by heat treatment. or by cutouts in the needle. In order to prevent or at least partly eliminate. breakage of the needle hooks. the different properties of the needle section are expected to vary the frequency or phase displacement of the occurring oscillations. However. this theory seems to be contradicted by tests. since the intervals between the impacts of the butts on the cams are so long that the oscillation in the needle is terminated before the following impact.
  • the breaking of the needle hook depends on the impact ofthe needle butt against the cam in the cam box. and on the high acceleration ofthe needle hook caused upon the transition to a raising or falling cam track. For a desired increase in the operational speed ofa circular knitting machine by at least 25 percent. the aboveexplained measures. which relie on empirical information. are not sufficient.
  • Another object of the invention is to prevent the breaking of knitting needles at high operational speed of the knitting machine.
  • Another object of the invention is to provide in the shank of a knitting needle. shank portions which have such a shape that oscillations caused by inpacts of the butt on cams. are suppressed.
  • the present invention comprises a knitting needle whose shank has a predetermined height between the front and back edges. and which includes at least one shank portion slanted to the longitudinal direction of the needle. and having a width less than the predetermined height of the needle shank. Due to the provision of the narrow slanted shank portion. oscillations due to the impact of the butt on cams are suppressed.
  • the width of the narrow slanted shank portion is at most one-third of the predetermined height of the shank. and the slanted shank portion defines with the back edge an angle of at least 50, and not greater then 130.
  • the slanted shank portion, or several slanted interconnected shank portions. are produced by cutouts in the front and back edges forming between each other the narrow slanted shank portions. The depth of each cutouts is greater than half the height between the front and the rear edges so that apexes of the preferably triangular cutouts overlap in a direction transverse to the longitudinal direction of the shank.
  • the cutouts may also be segment shaped.
  • a second slanted narrow shank portion extends parallel to the first slanted shank portion, and a third narrow shank portion connects the parallel slanted shank portions and is slanted in a direction opposite to the parallel slanted shank portions. so that a greater oscillation suppressing effect is obtained.
  • Knitting needles constructed in accordance with the invention are subjected to a minimum of breakages. Since the manufacturing of the knitting needles in accordance with the invention is not substantially more complicated than the manufacture of standard knitting needles, the advantages of the present invention. namely better quality of the knitted fabric. and higher productivity of the knitting machine. substantially exceed the disadvantage of a more complicated manufacturing operation.
  • FIG. is a side view illustrating a latch needle according to prior art
  • FIG. 2 illustrates the mounting of cylinder needles in a needle cylinder
  • FIG. 3 is a side view of a series of knitting needles moving through positions I to V during the formation of a stitch;
  • FIG. 4 is a schematic view illustrating the cooperation between the butts of the knitting needles and the raising and stitch cams of the cam box off the machine;
  • FIG. 5 is a fragmentary side view illustrating one embodiment of the knitting needle according to the invention.
  • FIG. 6 is a fragmentary side view illustrating another embodiment of the invention.
  • FIG. 7 is a fragmentary side view illustrating a further embodiment of the invention.
  • FIG. 8 is a side view illustrating the blank which can be used for manufacturing a knitting neelde according to the invention.
  • FIG. 9 is a side view, and FIG. 9a is a plan view illustrating the formation of a slot in the mounting portion of the needle;
  • FIG. 10 is a side view illustrating the mounting of the latch.
  • FIG. II is a side view illustrating a knitting needle according to a further modified embodiment of the invention.
  • a latch needle I has a shank 2 which has at one end the hook 3 and at the other end a tail portion 4 formed with a butt 5.
  • the hook 3 merges into the mounting portion 6 in which a latch 7 is mounted for angular movement on a rivet 8 between positions for opening and closing the book 3.
  • Rearward of the reinforced mounting portion 6, a narrow stem portion is formed. which permits complete retrac tion of the latch 7 with spoon 9 to an open position.
  • knitting needles I are mounted for movement in vertical milled channels I] which are provided in the needle bed 12 ofthe cylinder ofa circular knitting machine.
  • the channels 11 are separated by guide ribs 13, which guide the needles 1 during recipro cating movement in the channels 11.
  • lammelar strips are inserted into the needle bed body, which perform the function of the guide ribs 13. Since the needle beds 12 of most knitting machines are arranged in a vertical or slightly slanted position, the movement of the needles in forward direction to the highest position is referred to as lifting, and the opposite movement as lowering.
  • Position I shows the old loop 15 in the hook 3 of the latch needle 1, when the latch needle I is raised by a raising cam I8, as shown in FIG. 4, the old loop 15 opens latch I and slides down on the stem 10, as shown at 11.
  • a stitch cam I9 see FIG. 4, it as sumes the position III in which the old loop slides under the latch 7, while the new yarn 16 is caught by the hook 3.
  • the latch needles I move together with needle bed 12 against the slanted surfaces of the raising cam 18 and the stitch cam 19, and at a speed of 0.5 to I m/sec.
  • the cam track faces of the cams l8 and 19 are usually planar and form usually an angle of 50 with the direction of movement ofthe latch needle 1.
  • the needle butt 5' abuts the slanted cam track portions of raising cam I8 or stitch cam I), so that an impact is exerted for raising and lowering the knitting needle The impact can be measured. and is many times the force required for lifting or lowering the knitting needle I.
  • the impacts of the butts 5, or 5' in FIG. 4 cause the aboveexplained longitudinal oscillation in the shank 2 of the latch needle I.
  • the impact is transmitted through the shank 2 to the hook 3 which is subjected to fatigue and breaks at the root 20 of the hook 3. Such fatigue and consequent breaking of the needle hooks 3 is to be prevented by the invention.
  • FIG. 5 illustrates a portion ofa knitting needle in accordance with the first embodiment ofthe invention.
  • the shank 22 of the latch needle 21 is formed with two opposite cutouts 23, 24 in the front edge fand back edge 26 of the shank 22.
  • the substantially triangular cutouts 23, 24 overlap a transverse dis tance .I'.
  • the first cutout 23 is directly adjacent the needle butt 5, and the second cutout 24 adjacent the first cutout 23 in the direction toward the hook 3.
  • the two triangular cutouts 23 and 24 form together the narrow slanted shank portion 25 whose width is at most onethird of the height z of shank 22, and whose corresponding width is indicated at y (y s z/3).
  • the angle or formed by the narrow slanted shank portion 25 and by the back edge 26 of the shank 22, is within the range of from 50 to I30 so that the shank obtains a certain resiliency, which is capable of reducing the accelera tion upon impact of the butt 5 on a cam track face.
  • the height of shank 22 rearward of the narrow slanted portion 25, may either be the same as the width of the narrow slanted shank portion 25, as shown in FIG. 5, or the original height 2 of shank 22 may be retained, as shown in FIG. 7.
  • another slanted shank portion 30 is formed by a cutout 31 in the shank and the cutout 31 forms also a straight shank portion 32 extending along the back edge 26 and having a height less than the height a of the shank 22.
  • the narrow slanted shank portion 25 may also in some cases be subject to fatigue and breakage, it is possible to strengthen the slanted narrow shank portion 25 by a suitable heat treatment, known to those skilled in the art.
  • the heat treatment may consist in local annealing by means of a gas flame, or heating by highfrequency oscillationsor by immersing into molten lead.
  • An annealing method in which the needles are immersed in hot cylinder oil, or in a hot air furnace with an inert atmosphere can also be used.
  • Such heat treatments are well known, and it is only required to localize the heat treatment to the stressed shank portions.
  • the shank 22 can also be formed with several successive narrow slanted shank portions 25, as shown in FIG. 6.
  • the first narrow slanted shank portion 25 is formed by the two triangular cutouts 23, 24, as described with reference to FIG. 5, and the following section of shank 22 is again provided with two identical triangular cutouts 23a, 24a which together from a narrow slanted shank portion 25a.
  • the remainder of the shank has again the normal height.
  • the oscillation suppressing effect of the knitting needle of the invention can be further increased by pro viding a second narrow slanted shank portion 25a par allel to shank portion 25, and connecting the parallel narrow slanted shank portions 25, 25a by an oppositely slanted narrow slanted shank portion 27
  • the shank portions 25, 25a and 27 preferably have, as shown in FIG. 7. the same width.
  • the manner of manufacturing the needle according to the invention is shown in FIGS. 8 to 10. As shown in FIG. 8, a needle blank la is stamped out of a metal sheet, the hook 3 being later formed in a separate operation.
  • the mounting portion 6 is provided with a slot 28 for receiving the latch 7, 9, as shown in FIGS. 9, 9a and 10, the latch 7, 9 being also formed in a separate operation.
  • FIG. II II- lustrates a complete needle in which the shank portion 22 is formed forwardly of the butt 5 with two cutouts 23 and 24 in the manner as described in connection with FIG. 5.
  • the needle shown in FIG. 11 differs from the embodiment partly shown in FIG. 5 in that the shank portion 22 forwardly of the cutouts has the same height as at the tail portion 4 of the needle.
  • FIG. 1] illustrates also the usual hook 3 at the front end of the needle as well as the latch 7 mounted for angular movement on the rivet 8 in the mounting portion 6 of the needle.
  • Oscillation suppressing knitting needle having a shank with a front edge and a back edge, a hook at one end and a butt at the other end and projecting from said front edge, said shank having a predetermined height between the front and back edges at least in the region of said butt and including a first substantially triangular cutout extending from said front edge into said shank adjacent said butt, and a second substantially triangular cut-out extending into said shank from the said back edge at a location longitudinally adjacent to said first cut-out and spaced from said first cutout in direction toward said hook, said cut-outs forming between themselves a slanted resilient shank portion having a width considerably smaller than said predetermined height and having substantially parallel edges slanted to said front and back edges so that oscillations due to the impact of said butt on cams are suppressed.
  • each cutout is greater than half the height between said front and rear edges so that said triangular cutouts overlap in a direction transverse to the longitudinal direction of said shank.
  • Oscillation suppressing knitting needle having a shank with a front edge and back edge, a hook at one end, and a butt at the other end, said shank having a predetermined height between said front and back edges at least in the region of said butt, and including a first shank portion slanted to the front and back edges, a second shank portion parallel to said first shank portion, and a third shank portion connecting the parallel slanted shank portions and being slanted to said front and back edges oppositely to said parallel slanted shank portions, all of said slanted shank por tions having the same width which is less than said predetermined height.
  • Oscillation suppressing knitting needle having a shank with a front edge and a back edge, a hook at one end and a butt on the other end, said shank having a predetermined height between said front and back edges at least in the region of said butt, and including a shank portion slanted to said front and back edges and having a width less than said predetermined height, and a cutout in said front edge of said shank adjacent said slanting shank portion and forming a second oppositely slanted shank portion having a width less than the predetermined height, said cutout also forming a straight shank portion extending along said back edge and having a height less than said predetermined height.
  • a knitting needle having a shank with a front and back edge, a hook at one end, and a butt at the other end, said shank having a predetermined height between said front and back edges at least in the region of said butt, and having cutouts in said front and back edges whose depth is greater than half of said height between said front and back edges so that said cutouts overlap in a direction transverse to said edges, said cutouts forming between each other a first narrow shank portion slanted to the front and back edges at an angle within the range of 50 to and having a width of about one-third of said height, a second narrow shank portion substantially parallel to the first shank portion, and a third narrow shank portion connecting said first and second shank portions and being slanted to said front and back edges oppositely said parallel shank portions.
  • Oscillation suppressing knitting needle having a shank with a front edge and a back edge, a hook at one end, and a butt at the other end, said shank having a predetermined height between said front and back edges at least in the region of said butt and including two substantially triangular cutouts respectively extending from said front and back edges into said shank, said cutouts being spaced in the longitudinal direction of said shank so as to form between said cutouts a first slanted shank portion having substantially parallel edges slanted to said front and back edges, said first slanted shank portion having a width considerably smaller than said predetermined height, a second slanted shank portion parallel to said first slanted shank portion, and a third shank portion connecting said parallel slanted shank portions and being slanted to the front and back edges opposite to said parallel slanted shank portions so that oscillations due to the impact of said butt on cams are suppressed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US315162A 1971-12-14 1972-12-14 Oscillation suppressing knitting needle Expired - Lifetime US3875767A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS867371A CS158985B1 (enrdf_load_stackoverflow) 1971-12-14 1971-12-14

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US3875767A true US3875767A (en) 1975-04-08

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CS (1) CS158985B1 (enrdf_load_stackoverflow)
DE (1) DE2257847A1 (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994145A (en) * 1974-02-05 1976-11-30 Agula S.A. Knitting-machine needle
US4068500A (en) * 1976-05-13 1978-01-17 Kohorn Alfred O Knitting machine needle with front and back cut-outs and spring
US4089192A (en) * 1976-04-30 1978-05-16 Kohorn Alfred O Knitting machine needles with improved cut-off and spring location
US4237705A (en) * 1976-12-16 1980-12-09 Petrov Evgeny I Loop-forming instrument of knitting machine
US4255948A (en) * 1978-04-26 1981-03-17 Needle Industries Limited Stress reducing latch needle shank
US5154069A (en) * 1991-09-12 1992-10-13 Exeltor Inc. Knitting needle having force reduction portion
US5233846A (en) * 1991-06-25 1993-08-10 Fukuhara Needle Co., Ltd. Needles for knitting machines
US6298692B1 (en) 1998-08-24 2001-10-09 Fukuhara Needle Co., Ltd. Knitting instrumentalities for a knitting machine and method of forming same
US20090229310A1 (en) * 2004-12-07 2009-09-17 Atsumu Abe Part for Circular Knitting Machine
JP2024500337A (ja) * 2020-12-16 2024-01-09 グロッツ－ベッケルト・カーゲー 編み具

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2820925C2 (de) * 1978-05-12 1982-11-18 Sulzer Morat Gmbh, 7024 Filderstadt Gestanztes Strickwerkzeug für Strickmaschinen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US841678A (en) * 1906-05-22 1907-01-22 Julius Hirsh Knitting-machine needle.
US1221806A (en) * 1914-08-31 1917-04-03 Scott & Williams Inc Needle-carrier and needle for knitting-machines.
US3411327A (en) * 1966-08-11 1968-11-19 Singer Co Expandable knitting needle
US3464237A (en) * 1967-08-10 1969-09-02 Alfred O Kohorn Knitting machine needle
US3748875A (en) * 1970-05-20 1973-07-31 Vyzk Ustav Pletarsky Working element of a knitting machine provided with at least one butt

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US841678A (en) * 1906-05-22 1907-01-22 Julius Hirsh Knitting-machine needle.
US1221806A (en) * 1914-08-31 1917-04-03 Scott & Williams Inc Needle-carrier and needle for knitting-machines.
US3411327A (en) * 1966-08-11 1968-11-19 Singer Co Expandable knitting needle
US3464237A (en) * 1967-08-10 1969-09-02 Alfred O Kohorn Knitting machine needle
US3748875A (en) * 1970-05-20 1973-07-31 Vyzk Ustav Pletarsky Working element of a knitting machine provided with at least one butt

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994145A (en) * 1974-02-05 1976-11-30 Agula S.A. Knitting-machine needle
US4089192A (en) * 1976-04-30 1978-05-16 Kohorn Alfred O Knitting machine needles with improved cut-off and spring location
US4068500A (en) * 1976-05-13 1978-01-17 Kohorn Alfred O Knitting machine needle with front and back cut-outs and spring
US4237705A (en) * 1976-12-16 1980-12-09 Petrov Evgeny I Loop-forming instrument of knitting machine
US4255948A (en) * 1978-04-26 1981-03-17 Needle Industries Limited Stress reducing latch needle shank
US5233846A (en) * 1991-06-25 1993-08-10 Fukuhara Needle Co., Ltd. Needles for knitting machines
US5154069A (en) * 1991-09-12 1992-10-13 Exeltor Inc. Knitting needle having force reduction portion
US6298692B1 (en) 1998-08-24 2001-10-09 Fukuhara Needle Co., Ltd. Knitting instrumentalities for a knitting machine and method of forming same
US20090229310A1 (en) * 2004-12-07 2009-09-17 Atsumu Abe Part for Circular Knitting Machine
US7690223B2 (en) * 2004-12-07 2010-04-06 Fukuhara Needle Co., Ltd. Part for circular knitting machine
JP2024500337A (ja) * 2020-12-16 2024-01-09 グロッツ－ベッケルト・カーゲー 編み具
US12312719B2 (en) * 2020-12-16 2025-05-27 Groz-Beckert Kg Knitting tool

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CS158985B1 (enrdf_load_stackoverflow) 1974-12-27
DE2257847A1 (de) 1973-06-20

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