US2053477A - Knitting machine - Google Patents

Knitting machine Download PDF

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Publication number
US2053477A
US2053477A US721587A US72158734A US2053477A US 2053477 A US2053477 A US 2053477A US 721587 A US721587 A US 721587A US 72158734 A US72158734 A US 72158734A US 2053477 A US2053477 A US 2053477A
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US
United States
Prior art keywords
thread
cam
threads
needles
wrap
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
US721587A
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English (en)
Inventor
Holmes Henry Harold
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.)
Wildt and Co Ltd
Original Assignee
Wildt and Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wildt and Co Ltd filed Critical Wildt and Co Ltd
Application granted granted Critical
Publication of US2053477A publication Critical patent/US2053477A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
    • D04B9/28—Circular knitting machines with independently-movable needles for producing patterned fabrics with colour patterns

Definitions

  • This invention consists in improvements in or relating to knitting machines and has. .for its object tofprovide an improvedrnechanism Whereby Warp-threads caribe knitted in combination with a ground-thread or threads to render the resultant fabric ladderproof or substantially ladderproof Within .the meaning of that term as defined in the specications of. prior United States applic-ations Nos. 415,659, 416,458-, l600,780 and British Letters PatentNo. 376,736.
  • a fabric of this kind is of special advantage for h ose and half-hosebecause'theouter surface exposed to ⁇ vievv'differs onlyveryslightly and is almost .indistinguishable fromf-a -plain knit fabric pro.-issued from ground-thread only.
  • the threaddrawing .device isv so formed, or iscombined with ,other means which Willoperate in an equivalent have to provide a surplus of the individual Warp ⁇ threads over and above that required 1.9 individual loops.
  • the loopdrawing device with a cam-.rise which ,will-impart :for the the required slight additional ⁇ pull substantially at the'moment. 0f Completion cf the loop-,drawing .1.5 movement of the needle.
  • rIhis improvement is of ⁇ particular advantage in rear-plated-Warp-thread fabricbecause if, during formation of .any loop, a surplus of. warpthread is available beyond-that required for the ⁇ 20 .loop formation the tendency vis for the Warp- -thread to ooze through thefabric to show somewhat on the face or rightside thereof. Such oozing spoils the appearance of the fabric and this is obviated in the present inventionl by4 elimination of the surplus Warp-thread atthe moment of loop formation.y l
  • Figure ⁇ la is a View looking from the right of Figure 1 to show onlyl the stitch-cam and one of the needles intheir relative positions at the f moment of engagement of a warp-thread bythe 440 additional tensioning device according to the invention, and
  • FIG. 2 isa plan on the line 1 -2 of Figure 1.
  • Like reference numerals indicate like parts in the several figures of the drawings.
  • the needle-cylinder is shown at I 0 with one needle I I in position. It will be understoodl that thecylinder-will be completely filled with needles lin the ordinary way.
  • the cam-box is indicatedo at I2, the sinker-camringat I3 and Sinkersat I4.
  • cam Ill acts as described in British patent specification No.
  • a cam-ring 20 is now provided to act as a draw-olf member for the warp-threads and is formed with a ⁇ gradual ris-e 2I which draws off in succession from each warp-thread supply an amount of Warp-thread adequate for the wrapping operation and releases the drawn off thread to the needles as the thread-guide is deflected laterally by vcam -IS andV returned inwardly by a return cam (not illustrated) Yassociated with cam I'I.
  • a second cam-rise reaches its highest point at 22 and serves as a second thread drawoff cam to draw off amounts of warp-thread required for loop formation as the needle descends the stitch-cam.
  • the relative positions of cam 23, feeder I5, needle I I,and stitch-cam 26 are clearly indicated in Figures 1 and 1a in which Figure la shows the relative positions of the stitch-cam and needle substantially at the time of knocking over, and Figure 1 (taken in conjunction with Figure 2) shows at the same moment the relative positions of the needle, thread-guide and cam 23.
  • cam-rises 2I and 22 take the place of the draw-off members 34 and 36 respectively illustrated in prior British Patent No. 364,039. Also the cam-rise 22 may be considered as theV equivalent of the cam 3l in United States patent application No. 642,254.
  • wrap-threads indicated in the drawings by the reference Vnumeral II5 will, in their passage fromv the wrap-thread supply bobbins to 'the wrap-thread feeders I5 be subjected to any desired and known form of tensioning as this follows the usual practice in knitting machines employing wrap-threads. It will be understood,
  • the stitch-cam commences to act upon the needle and as it nears the lowest point of the stitch-cam, cam I8 reprojects the feeder into the position illustrated on the right-hand side of Figure 1 so as to hold the warp-thread forwardly into the hook of the needle in order to assist in accurately plating the warp-threads in rear ofthe ground-thread in the finished fabric.
  • cam 23 engages its warp- Vthread to apply the Yrequisite slight' tension in accordance with the present invention.
  • a knitting machine the combination of a bed of needles, feeding means to supply ground and wrap threads to the needles, needle actuating means, a wrap thread draw-oifdevice for drawing lengths of thread required for loop formationV and to yield those threads to theV needles undertension, and means to impart to the Wrap threads, substantially at the moment of completion of the loop-drawing movements of the needles taking those'threads a momentary tension in order to apply an increased pull on the wrap threads to'assist in positioning them in their respective needle heads relatively to the ground thread.
  • a wrapping thread draw-olf device comprising a cam plate having at least two cam rises one of which engages the threads to draw off from each wrap thread supply an amount of thread required for loop formation and another of which serves to apply a momentary tension to the wrap threads to effect an increased tension thereon substantially at the moment of completion of the loop-drawing movements of the needles.
  • a knitting machine the combination of a bed of needles, feeding means to supply ground and wrap threads to the needles, needle actuating means, and a wrap thread draw-off device comprising a cam plate coaxial with the needle bed and having on it at least two cam rises one of which engages the threads to draw oi from each wrap thread supply an amount of thread required for loop formation, and another of which serves to apply a momentary tension to the wrap threads to effect an increased pull thereon substantially at the moment of completion of the loop-drawing movements of the needles.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US721587A 1933-04-21 1934-04-20 Knitting machine Expired - Lifetime US2053477A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2053477X 1933-04-21

Publications (1)

Publication Number Publication Date
US2053477A true US2053477A (en) 1936-09-08

Family

ID=10897231

Family Applications (1)

Application Number Title Priority Date Filing Date
US721587A Expired - Lifetime US2053477A (en) 1933-04-21 1934-04-20 Knitting machine

Country Status (2)

Country Link
US (1) US2053477A (de)
DE (1) DE618593C (de)

Also Published As

Publication number Publication date
DE618593C (de) 1935-09-11

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