US3514977A - Full fashioned knitting machine - Google Patents

Full fashioned knitting machine Download PDF

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Publication number
US3514977A
US3514977A US575298A US3514977DA US3514977A US 3514977 A US3514977 A US 3514977A US 575298 A US575298 A US 575298A US 3514977D A US3514977D A US 3514977DA US 3514977 A US3514977 A US 3514977A
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United States
Prior art keywords
yarn
cam
arm
knitting
fashioning
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Expired - Lifetime
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US575298A
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English (en)
Inventor
Leonard Brown
Ernest William Booles
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William Cotton Ltd
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William Cotton Ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/44—Tensioning devices for individual threads
    • 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
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions

Definitions

  • This invention is for improvements in or relating to straight bar kitting machines and concerns the control of yarn in its passage from a yarn package to the thread carrier and the needles.
  • snapper mechanism comprising yarn snapper arms which are cam operated to grip the yarn, at a location in its travel from a yarn package to a thread carrier and the needles, and pull it back through the thread carrier to take up the slack.
  • snapper mechanism comprising yarn snapper arms which are cam operated to grip the yarn, at a location in its travel from a yarn package to a thread carrier and the needles, and pull it back through the thread carrier to take up the slack.
  • this arrangement a disadvantage that such undue tension is applied to the yarn that faults occur at the selvedges.
  • US. Pat. No. 2,898,811 discloses the improvement of having an additional cam operated arm which, towards the end of each draw, i.e.
  • Another disadvantage of employing the aforesaid snapper mechanism is that, when fashioning, the snapper arms must have a greater movement; for this purpose a fashioning cam, on to which the snapper arm cam follower is shogged for fashioning, has a suitable rise beyond the periphery of the normal snapper cam at a location where it is required for the cam follower to shog on to the fashioning cam.
  • An object of the invention is to provide control means for yarn in its passage from a yarn package to the thread carrier and needles in such improved manner as to not only provide for coarse variations in the yarn, but also provide a more sensitive control of the yarn required for the above stated reasons.
  • the invention provides a straight bar knitting machine wherein there is provided, for acting on the yarn in its passage from a yarn package to the needles, a yarn control arm which is adapted for resilient action and is cam operated to alternatively allow substantially free running of the yarn during the draw and apply light tension to the yarn during the knitting motion.
  • the yarn control arm is mounted on a cam operated yarn deflecting arm by which the yarn is kinked to provide surplus yarn which is relinquished to the selvedge needles in substantially tensionless condition for satisfactory selvedging.
  • the cam operation is such that the yarn deflecting arm applies a brake on the yarn prior to a selvedge group of sinkers sinking the yarn.
  • the yarn control arm fis conveniently a spring arm pivoted on the first deflecting arm and has a head formed by an elongated eyelet through which the yarn runs.
  • a tail of the spring arm has an attached tension spring which may be mounted for adjustment of its effective strength.
  • stop means limiting move ment of the spring arm, and adjustment means for adjusting the relative positions of the different arms.
  • the yarn is under control of the spring arm so that the usual rise on the fashioning cam is dispensed with and the cam follower roller may be consequently of simple form i.e. not laterally spring biased.
  • the fashioning cam may have a small dip forsome controlled movement of the spring arm during fashioning.
  • the invention also provides in a straight bar knitting machine, yarn control means comprising'at least one yarn control arm' which is cam operated between one position in which it allows the yarn to run without deflection substantially freely and a second position in which it kinks the yarn to provide a surplus thereof for subsequently relinquishing, and a spring arm adapted to provide resilient control for the yarn when in the second kinked condition.
  • FIG. 1 is a somewhat diagrammatic side view of yarn control means of a Cottons patent straight bar knitting machine according to the invention.
  • FIG. 2 is a perspective view of part of FIG. 1.
  • FIG. 3 is an enlarged view of part of FIG. 1.
  • FIG. 4 is a similar view to FIG. 3 showing parts in diiferent relative positions.
  • the yarn control means shown is for a Cottons patent straight bar knitting machine and is in general accordance with the means disclosed therein to which reference is directed for full details. Briefly there is disposed, for control of yarn in its passage from a yarn package to a thread carrier and needles, two yarn deflecting arms 1, 2 adjustably connected to separate rods 3, 4 which are coupled together by interconnecting arms 3a, 4a to impart oscillatory movement from one rod to the other rod in opposite directions.
  • the rod 4 is operated by cam operated means comprising an arm 4a on the rod 4 and a link 4b connecting the arm 4a to a cam follower lever 4c on which is a cam follower 4d for operation by cams 4e, 4 on the machines main cam shaft 4g, the cam follower 4d being displaceable from one cam to the other cam by a fork arm 471 and mechanism disclosed in said patent under control of a selvedge stop mechanism.
  • the arm 1, see also FIG. 3, in this instance has a tail part 5 which is slidably adjustable in a bracket arm 6 by use of screw means 7, and the bracket arm 6 is attached to the rod 3 by clamping screw 8, allowing adjustment of the bracket arm 6 and arm 1 longitudinally and rotationally of the rod 3.
  • the arm 1 also has a downwardly extending U shaped head 9, FIG. 2, in a transverse plane.
  • the arm 2 is disposed under the arm 1 and has a tail part 10, FIGS. 1, 3 which is attached to the rod 4 by clamping screw 11 allowing adjustment of the arm 2 longitudinally and rotationally of the rod 4.
  • the arm 2 also has a transverse bar 12, FIG. 2, at one side of the transverse head 9 and a transverse bar 13 at the other side of the transverse head 9, and two bars being interconnected by a bridge piece 14. Yarn from a yarn package is first engaged with a cymbal tensioner T and is then passed under arm 13, over arm 9a of the U shaped head 9, and under the arm 12.
  • a yarn guide 15 mounted adjustably on the arm is a yarn guide 15 through which the yarn passes from under the bar 12 to a thread carrier and the needles.
  • a yarn control spring arm 16 made of piano wire, mounted by a pivot 18 on the bracket arm 6, and this arm 16 has a head 19 and a tail 19a including a corrugated portion 19b to which is attached a coil spring 20.
  • the head 19 of the spring arm 16 is in the form of a vertically elongated eyelet 21, FIG. 2, which is located between the aforesaid yarn guide 15 and bar 12 and through which the yarn therebetween passes.
  • the spring 20 is secured at a lower end to the bracket arm 6, and at its upper end a loop of it is adjustable into engagement with any of thecorrugations of the tail 1% of the spring arm 16.
  • the two cams 4e, 4f are alternatively for operation when knitting and fashioning, respectively.
  • the fashioning cam 4 instead of being completely of large diameter is provided, at a location leading to the large rise R1 of the knitting cam, with a fall -F so that the cam [follower 4d when having a shogging movement imparted to it towards the fashioning cam 4 in fact moves directly onto this cam without the delay heretofore which has been necessary due to the fashioning cam being completely of large diameter and which has necessitated the cam follower being laterally spring biased.
  • the knitting cam 4e has a usual large diameter portion CPI, a usual large rise R1, a larger fall F1 and of less length,
  • CP2 a portion of CP2 of usual smaller diameter but of less length, and an intermediate diameter portion CP and a smaller rise R between the large diameter portion CPI and the smaller diameter portion CP2.
  • the deflecting arms 1, 2 are slightly separated i.e. by the cam rise R causing the arm 1 to move a small distance up and the arm 2 to move a small distance down, as indicated in broken lines in FIG. 3, so that the yarn is slightly kniked in a manner applying a braking action on the yarn.
  • the object of this is to prevent the yarn becoming unduly slack in the region of the thread carrier and selvedge needles which may otherwise occur due to momentum particularly when the machine is operating at high speeds.
  • the large rise R1 of the knitting cam 4e causes further opening of the arms 1, 2 to kink the yarn to such further extent, as shown in FIG. 4, that surplus length of yarn is drawn from the yarn package.
  • the spring arm 16 takes some part in this kinking of the yarn, as shown, and this enables reduction in the amplitude of movement of the arms 1, 2.
  • the needles knitting motion has a small varying effect on the yarn leading to the selvedge needle such that if the yarn is not accurately controlled this can lead to faulty selvedges.
  • the spring arm 16 performs the important function of accurately controlling the yarn, the resilience of the arms movements, indicated in broken lines in FIG. 4, being such that it will follow the needles motion thereby maintaining re quired accurate tension on the yarn throughout the needle motion so that faulty selvedging can be avoided.
  • this yarn control mechanism is that it will operate satisfactorily for all working conditions of the machine, that is to say, irrespective of the type of yarn, the speed of the machine, the width of knitting, and so on, whereas the conventional snapper mechanism cannot work satisfactorily under all these conditions.
  • the mechanism described will be duplicated for each yarn and the three yarn engaging sets, of arms will preferably be located close together at the middle of the associated knitting division.
  • yarn control means cooperating with spaced yarn guides and comprising in combination, yarn deflector means, means mounting said yarn deflector means for displacements transversely between said yarn guides, cam operating means operably connected to said yarn deflector means for effecting said displacements between a yarn-kinking position, at least to an appreciable extent at required times to permit drawing, from a supply, an additional length of yarn at the end of each draw, and a following position aligned with the yarn guides for releasing the additional length of yarn at the start of each next draw and for the yarn to thereupon run straight between the yarn guides for the major part of said next draw, auxiliary resilient yarn deflector means, and means mounting said auxiliary yarn deflector means to be resiliently operable 0n the kinked part of the additional drawn yarn for resilient control of the yarn during the knitting motion of the machine.
  • cam operating means further constitutes means for causing said displacements at other times to be to a further yarn-kinking position which is to a smaller extent such as to apply a braking action on the yarn towards the end of each draw and to avoid slackeing of the yarn.
  • said cam operating means includes a knitting cam having a comparatively small diameter portion for non-action on said yarn deflector means at the end of each draw, a fashioning cam having a larger diameter portion and a fall leading to a small diameter portion registering with said small diameter portion of said knitting cam, cam follower means, and means for changing engagement of said cam follower means between said knitting cam and said fashioning cam at the registering small diameter portions thereof.
  • yarn control means cooperating with a machine mounted yarn tensioning device and a spaced yarn guide, a first yarn deflector arm carrying the yarn guide and including at least one portion disposed for displacements transversely between the yarn guide and the yarn tensioning device, a first rocking rod mounting said first yarn deflector arm, a second yarn deflector arm having a portion disposed for displacements transversely between said yarn guide and said yarn tensioning device, a second rocking rod mounting said second yarn deflector arm, an auxiliary yarn deflector arm adjustably resiliently mounted on said second yarn deflector arm and including a portion disposed for displacement transversely between the yarn guide and the yarn tensioning device, means inter-connecting said rocking rods for producing opposite rotational movements thereof, cam follower means connected to one of said rocking rods, a knitting cam having a cam contour for providing the required displacements of said yarn deflector arms at required times, said contour including a small diameter portion, and a fashioning cam having a small diameter portion registering
  • Means for controlling yarn in a full fashioned knitting machine comprising main and resilient yarn deflector means, cam operating means, a first cam portion for causing said cam operating means to effect displacements of said main and resilient yarn deflector means an aligned position allowing straight running of yarn for the major part of each draw, a second cam portion for causing said cam operating means to effect displacements of said main and resilient yarn deflector means to a first offset position for the main and resilient yarn deflector means to kink the yarn to an extent for drawing an additional length of yarn at a stage at the end of each draw and for releasing the additional length of yarn at the start of each next draw, a third cam portion for causing said cam operating means to effect displacements of said main and resilient yarn deflector means to a second offset position for kinking the yarn to an extent for applying a braking action thereon towards the end of each draw, said resilient yarn deflector means, in said first offset position, being adapted by its resilience for kinking the yarn in a resilient manner to allow for varying movements during the
  • a full fashioned knitting machine having in combination, a yarn tensioning device, a yarn guide spaced from said yarn tensioning device, main yarn deflector means, auxiliary yarn deflector means, knitting and fashioning cam operating means operable on said main yarn deflector means and said auxiliary yarn deflector means comprising first cam portions for causing said yarn deflector means to kink yarn between said yarn tensioning device and said yarn guide to different extents at least one other cam portion for causing said yarn deflector means not to kink said yarn, said auxiliary yarn deflector means being resilient for causing resilient kinking of the yarn at required times, and means for interchanging control between said knitting and fashioning cam operating means.
  • a full fashioned knitting machine having non-snapper yarn control means comprising in combination with a yarn tensioning device, a pair of main yarn deflector arms, a yarn guide carried by one of said yarn deflecting arms, a pair of rocking rods mounting said yarn deflector arms respectively for displacements transversely between said yarn guide and said yarn tensioning device, an auxiliary yarn deflector arm adjustably resiliently mounted on the other of said yarn deflecting arms, knitting and fashioning cam operating means operable on said rocking rods for causing predetermined positive transverse displacements of said yarn by said main yarn deflector arms and predetermined resilient transverse displacements of said yarn by said auxiliary yarn deflector arm,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US575298A 1965-09-04 1966-08-26 Full fashioned knitting machine Expired - Lifetime US3514977A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37897/65A GB1084568A (en) 1965-09-04 1965-09-04 Improvements in or relating to straight bar knitting machines

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US3514977A true US3514977A (en) 1970-06-02

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US575298A Expired - Lifetime US3514977A (en) 1965-09-04 1966-08-26 Full fashioned knitting machine

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US (1) US3514977A (fr)
CH (1) CH457690A (fr)
DE (1) DE1560991A1 (fr)
GB (1) GB1084568A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688525A (en) * 1969-12-01 1972-09-05 Courtaulds Ltd Flat bed knitting machines
EP0231484A1 (fr) * 1986-01-28 1987-08-12 H. Stoll GmbH & Co. Dispositif de tension du fil pour métier à tricoter rectiligne
CN117166126A (zh) * 2022-06-02 2023-12-05 株式会社岛精机制作所 纱线张力控制装置、打结装置及横机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115305634B (zh) * 2022-08-26 2024-07-05 浙江理工大学 一种纱线二级张力补偿装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1718835A (en) * 1927-04-30 1929-06-25 Burson Knitting Company Yarn-feed mechanism
US2143485A (en) * 1937-05-24 1939-01-10 Textile Machine Works Yarn tensioning for knitting machines
US2660041A (en) * 1950-12-22 1953-11-24 Textile Machine Works Thread tension arrangement for knitting machines
US2667772A (en) * 1951-08-14 1954-02-02 Alfred Hofmann & Co Auxiliary yarn tensioning means
US2899811A (en) * 1959-08-18 Straight bar knitting machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899811A (en) * 1959-08-18 Straight bar knitting machines
US1718835A (en) * 1927-04-30 1929-06-25 Burson Knitting Company Yarn-feed mechanism
US2143485A (en) * 1937-05-24 1939-01-10 Textile Machine Works Yarn tensioning for knitting machines
US2660041A (en) * 1950-12-22 1953-11-24 Textile Machine Works Thread tension arrangement for knitting machines
US2667772A (en) * 1951-08-14 1954-02-02 Alfred Hofmann & Co Auxiliary yarn tensioning means

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688525A (en) * 1969-12-01 1972-09-05 Courtaulds Ltd Flat bed knitting machines
EP0231484A1 (fr) * 1986-01-28 1987-08-12 H. Stoll GmbH & Co. Dispositif de tension du fil pour métier à tricoter rectiligne
CN117166126A (zh) * 2022-06-02 2023-12-05 株式会社岛精机制作所 纱线张力控制装置、打结装置及横机
EP4286578A1 (fr) * 2022-06-02 2023-12-06 Shima Seiki Mfg., Ltd. Dispositif de commande de tension de fil, dispositif noueur et machine à tricoter rectiligne

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CH457690A (fr) 1968-06-15
GB1084568A (en) 1967-09-27
DE1560991A1 (de) 1971-04-01

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