US3246488A - Straight bar knitting machines and method - Google Patents

Straight bar knitting machines and method Download PDF

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Publication number
US3246488A
US3246488A US116711A US11671161A US3246488A US 3246488 A US3246488 A US 3246488A US 116711 A US116711 A US 116711A US 11671161 A US11671161 A US 11671161A US 3246488 A US3246488 A US 3246488A
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Prior art keywords
cam
transfer
cable
stitch
needles
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US116711A
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English (en)
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Harrison Michael
Zouch Ashby De La
Hincklieff Alan Edward
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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
    • D04B11/00—Straight-bar knitting machines with fixed needles

Definitions

  • This invention is for improvements .in or relating to straight bar knitting machines of the Cottons Patent and other similar type which are characterized by each having a row of bearded needles mounted on a bar for simultaneous operation, and a narrowing head for movements of loop transfer points in the transference of loops, the bar and narrowing head being operated through their own cam follower mechanism by cams on a cam shaft in the machine.
  • the invention primarily concerns improvements in or modifications of the invention described in U.S. Patent No.
  • a straight bar knitting machine having means for producing knitted larticles with cable stitch patterns, which means comprises bearded needles, adjacent sub-groups of loop transfer instruments for co-operation withthe bearded needles, means mounting said instruments for dipping movements, means mounting said instruments for sideways movements in opposite directions appropriate for for the transfer of loops by the instruments from some of ⁇ the bearded needles to others of the bearded needles, and means for effecting said movements of the instruments appropriate to produce a crossed-over loop formation at spacedcourse intervals.
  • An object of the invention is to provide means whereby the cable stitch pattern is more clearly defined and preferably employing an improved transfer instrument control arnangement.
  • the invention provides animprovement inror a modification of the method claimed in our U.S, Patent No. 3,100,975 which consists in causing a needle at each side of the cable stitch forming needles to release their loops for a number of coursesduring which the cable stitch is formed thereby producing a repetitive drop stitch at each side of the cable stitch. Conveniently at the commencement of .making the cable stitch, Ithe loops last formed before the drop stitches are locked in the fabric against running.
  • the .invention also provides an improvement in or a modification of the machine claimed in our U.S. Patent No. 3,100,975 which comprises means operably associated with :a needle at each side of the cable stitch forming needles for causing each said needle to release their loops, and means for causing repetition of this for a number of courses during which the cable stitch is formed,
  • a bent-over tipped point operably associated with the subgroups of transfer instruments :at each side thereof, to close their associated needle beards and allow the latters loops to be cast off.
  • the sub-groups of transfer instruments may be operated by suitable means to transfer each of said loops to adjacent needles.
  • these means consist of a cam shaft, camoperated mechanism, and racked cam mechanism for obtaining appropriate dipping and sideways movements of The sequence of movements vof the sub-groups of the sub-groups of transfer instruments.
  • transfer instruments may be first to pick up and transfer loops, including the loop from one of the side needles and excluding the loop on the other side needle, to next adjacent needles in a directiontowards said other side needle, then to pick-up and transfer loops, including the loop from the latter side needle and excluding the loop transferred from the one side needle to next adjacent needles in the opposite direction.
  • means for displacing the subgroups of transfer instruments into and out of operative position which means may include for manual :and automatic displacements respectively.
  • FIGURE 1 is a general cross sectional view of a Cottons patent or other similar straight bar knitting machine according to the invention.
  • FIGURE 2 is an enlarged general perspective view of cable stitch forming mechanism of the machine.
  • FIGURE 2a is a lower extension of FIGURE 2.
  • FIGURE 3 is an enlarged detail perspective view of a cable box part of said mechanism.
  • FIGURE 4 is a detail cross sectional view of needle operating mechanism of the machine.
  • FIGURE 5 is a detail cross sectional view of narrowing head operating mechanism of the machine.
  • FIGURE 6 is a detail cross sectional view of drop stitch point operating mechanism of the machine.
  • FIGURE 7 is a detail plan view of a cam shaft shogging means of the machine.
  • FIGUE 8 is a detail sectional view lof said shogging mechanism.
  • FIGURE 9 is a detail front view of said shogging mechanism.
  • FIGURE 10 is a detail perspective viewl showing a stage, in the production of cable stitch patterned fabric on said machine, where loop transfer and drop stitch points are in a raised starting position.
  • FIGURE 1l shows a later stage where the transfer points have been sideways displaced and are boxed with the needles, the drop stitch points being inoperative.
  • FIGURE 12 shows a later stage where the transfer points and needles have been lowered.
  • FIGURE 13 shows a later stage where the transfer points are raised.
  • FIGURE 14 shows a later stage where the transfer points have been sideways displaced.
  • FIGURE 15 shows a later stage where the drop-stitch points are boxed with the needles.
  • FIGURE 16 shows a later stage where the transfer points have been raised.
  • FIGURE 17 shows a later stage where the transfer points have been sideways displaced and are boxed with the needles.
  • FIGURE 18 shows a later stage where the transfer points and needles have been lowered.
  • FIGURE 19 shows a later stage where the transfer points have been raised.
  • FIGURE 20 shows a later stage where the transfer points have been sideways displaced.
  • FIGURE 21 shows a later stage where the transfer Patented pr. 19, 1966 points have boxed with the needles and both have been loweredv
  • FIGURE 22 shows a later stage where the transfer points have been raised.
  • FIGURE 23 shows a later stage where all the points are out of action.
  • FIGURE 24 shows a later stage where the transfer points are inoperative and the drop-stitch points have lbeen lowered.
  • FIGURE 2S shows a later stage when the drop-stitch points and needles are lowered.
  • FIGURE 26 shows a later stage where the drop-stitch points have been raised.
  • FIGURE 27 shows a. later stage where the transfer points are boxed with the needles, the drop stitch points being inoperative.
  • FIGURE 28 shows a later stage where the transfer points are partly raised.
  • FIGURE 29 shows a later stage where the transfer points have been sideways displaced.
  • FIGURE 30 shows a later stage where the transfer points are boxed with the needles.
  • FIGURE 3l shows a later stage where some transfer points are fully raised and others are partly raised.
  • FIGURE 32 shows a later stage where the latter points are lowered and needle beards are not pressed.
  • FIGURE 33 shows a later stage similar to FIGURE 3 l.
  • FIGURE 34 shows a later stage where the transfer points have been sideways displaced.
  • FIGURE 35 shows a later stage where the transfer points have boxed with the needles and all points have been raised out of operation.
  • FIGURE 36 shows a later stage with the transfer points out of operation and the drop-stitch points operative.
  • FIGURE 37 is a pictorial View of part of the fabric produced.
  • a Cottons Patent or other similar straight bar knitting machine is represented by bearded needles 1 which are mounted for simultaneous operation on a needle bar 2 (shown particularly in FIG- URE 4) operated through cam follower mechanism such as 3 by rotary cams such as a presser course cam 4 on the machines main cam shaft 5, and a narrowing head represented generally at 6 which is operated through cam follower mechanism 7 (shown particularly in FIG- URE by a shaped narrowing head fashioning cam 8 lon the machines cam shaft 5.
  • Usual earn shaft shogging mechanism shown particu- 18 for engagement respectively by the face cams 13, 14.
  • the parts 16 represent the usual bell crank lever, link,
  • lever 21 is thereby removed from behind the collar 20 so that the plunger 19 is free to spring away, i.e., toward the cam 12) so that the cam follower 15 can then ride up and down the rise on the cam 12 and through the consequent pivoting of the bell crank lever this causes the cam followers 17, 18 to be brought alternately into the path of the cams 13,
  • FIGURE 8 shows the position where the cam follower 15 has moved down the rise on the cam 12, the cam follower 18 has consequently lowered, and cam follower 17 has been raised for engagement by the ⁇ face cam 13 whereby the cam shaft 5 will be shogged to the right.
  • the rise on cam 12 next engages the cam follower, this reverses the cam followers 17, 18 and the cam shaft is shogged to the left.
  • Each movement is made at required times; and to carry one set of cams away from their cam followers and t-o engage different cams with the cam followers.
  • Cam 12 turns one arm 16C of the bellcrank so that its other perpendicular arms 16e, 16j move the end of lever 16a which turns about pivot 16h and moves cam follower 1S into engagement with face cam 18, while cam follower 17 moves away from face cam 13.
  • Spring means bias the cam followers toward the cams so that plunger 19 is restored by the cam 12 to its initial position.
  • a particular result of this shoggiug of the cam shaft 5 to the right by face cam 13 is to put the machine into a fashioning motion bythe shaped narrowing head fashioning cam 8 (FIGURE 5) becoming operative from a circular narrowing head course cam 8a such that the narrowing head 6 then has a motion constituted by a first dip, next a part rise, and then a second dip followed by a complete rise back to its original position, the usual object of this being to cause loop transfer points such as 26 of a fashioning finger 26a (FIGURE 2) to transfer loops from some needles to others at selvedges S of the fabric F for fashioning by widening or narrowing.
  • a circular course cam 27 (particularly FIGURE 4) which is rendered operative by shoggiug of a movable cam follower 28 on to it from the cam 4 and prevents the beards 1a of the needles 1 from being pressed when required (for ⁇ a purpose hereinafter referred to).
  • the shogging of the cam follower 28 is effected by a fork 29 operated through suitable mechanism 29a from the machines pattern chain 25.
  • the narrowing head 6 (see particularly FIGURE 2) generally incorporates transfer point bars 30, 31, 32, 33 slidably mounted in spaced brackets 34, 35 carried by arcuate arms 36, 36a, the latter being mounted on a shaft 37 for pivotal movement.
  • bracket 35 has a forward extension 35a in which there is slidably mounted a pair of bars 38, 39 to which there is secured what may be called for convenience a transfer unit or cable box 4t),k and which is raised and lowered by raising and lowering of the narrowing head.
  • This cable box 40 (see also FIGURE 3) consists of an inverted L shaped block of channel section having a rear cover 41 and an upper recess 40a for the bars 38, 39 and which is bridged by ⁇ a topcover 41a. Slidably mounted in the cable box 40 there are two cable or transfer ngers 42, 43 each having three downwardly projecting loop transfer points 42P, 43P. This slidable mounting allows for the cable ngers 42, 43 to be raised and lowered by the raising and lowering of the cable box 40 with the narrowing head, andy in addition, the lingers have some independentmovement.
  • the cable finger 43 is lvertically displaceable, by means to be described, in either direction from standing position in transfer unit or the cable box 40,'whereas cable linger 42 is only displaceable, by means to be described, above standing position because of a pin 44 (particularly FIGURE 3) on the linger 42 projecting over a shoulder 43b of the cable finger 43 for raising the cable linger 43 and consequently the linger 42, through the shoulder 43h and the pin 44, and independently of the cable box, and for lowering linger 43 independently of linger 42 and of the cable box 40.
  • Cable linger 43 has an upper hook 43awhich hooks onto an operating rod 45 constituting van operating means for the transfer linger 43.
  • Hook 43a has an attached prop 43b for displaceable engagement over a rod 46 and a gap G for displaceable disengagement from an elongated operating rod 45.
  • the cable lingers 42, 43 are of channel form and they have slidably mounted in them respectively drop stitch slides or lingers 47 and 48 which have forks 47a and 48a engaging said rod 46, the forks being suliiciently long to remain in continual engagement with rod 46, and the slides each carrying a downwardly projecting dropstitch point 47P, 48P.
  • the elongated operating member or rod 46 is carried by arms 49, 50 (FIGURE 2) which are secured on an elongated rocking support spindle 51 and, as shown in FIGS. 1 and 2a, the latter is rocked by a cam 56 through an arm 51a, link connections 52, 53 a cam follower 54 (FIGURE 2a) and spring 55.
  • the drop stitch course cam 56 on the main shaft 5 is operable in the normal knitting motion of the machine.
  • a circular drop stitch fashioning cam 56a is moved under the cam follower 54 by the shogging of the cam shaft 5 for the fashioning motion.
  • Elements 46, 49, 50, 51, 52, 53, 54, 55, 56 are the operating means of the drop stitch fingers 47, 48.
  • a manually releasable latch 51b (FIGURE 1) on a pivot carried by link 52 and connecting the arm 51a to the link 52 by peg and slot 51C is operable to render the spindle 51 and consequently the drop stitch points operative and inoperative.
  • the rod 45 is carried by arms 57, 58 secured to rocking spindle 59, the latter being rocked through arm 60, link 61, cam follower means 62 (FIGURE 2a) including cam follower 62a and a transfer point fashioning cam 63 on the cam shaft 5.
  • cam follower 62a is shiftable, by fork 62h and suitable mechanismv 62C from the pattern chain 25, from said cam 63 (which is operable during certain fashioning motions) either onto a transfer point circular fashioning cam 63a for other fashioning motions or onto a transfer 4point circular course cam 63b for normal knitting motions of the machine, a suitable change between the cams also being made when the cam shaft shogs.
  • the bar 38 (FIGURE 2) is operative, i.e., for driving a left hand cable box for right over left cable stitch, (the other bar 39 is for driving a right hand cable box, i.e., for left over right cable stitch) by having formed in cable box 40 an upper slot 41a connected with the lower channel 40C of cable box 48 and having a block 38a partly disposed in channel 40C and partly in slot 41a.
  • a bar 38 extends through an upper recess in block 38a and is clamped to the same by a cap 38C secured to block 38 by screws 38h.
  • the bars 38, 39 are shogged endwise by lirst operating means including lock stitch and cable stitch Dawson wheels 64, 65, 66, 67 (FIGURE 2).
  • cam followers 68, 69 which are on a rod 70a, 71o carried by brackets 70h, 7th which are secured to the bars 38, 39 and the cam followers are displaceable by hand turned screws 70, 71, into engagement with appropriate of the cams.
  • the cams are racked round by ratchet wheel 72, clawker 73, bell crank lever 74 and link connection 75 to cam follower means 76 (FIGS. 1 and 2a) including a cam follower 76a.
  • the latter is shiftable, for example by hand or by fork 76b through suitable mechanism 76e from the pattern chain 25, to engage either a lock stitch shaped fashioning cam 77 or a lock l upward motion of the narrowing machine.
  • Second operating means including cam shaft 5 raise and lower transfer unit 40 with head 6.
  • the cable box 40 is displaceable up to the fashioning linger bars 30, 31, 32, 33 into operative position against return bias of a spring 78, and it is there releasably held by a latch 79 engaging behind a lug 80 under bias of a spring 81 and constituting a releasable latching means.
  • a knob 4Gb on the cable box 40 facilitates handling of the box.
  • a rotary cam 82 (FIG. 2) on a shaft 83 immediately above the box is automatically operated' to engage a peg 79a (FIG. 3) on latch 79 and release the latter from the lug 80, so that spring 78 returns the cable box 40 to its inoperative position shown in FIGURE 2 spaced forwardly from the fashioning linger bars 30, 31, 32, 33.
  • the shaft 83 is rotated for said purpose by any suitable means. For example the shaft 83 which is shown cut away to the left of the cam 82, is rotated through pawl and ratchet means $4 (FIG.
  • cam follower means 87 (FIGS. 1 and 2a) with cam follower 87a shiftable by fork 87h through suitable means 87C from the chain 25, and a cable box shaped course cam 8S on the cam shaft 5 or for example by Cable box circular cams 88a and 88h are also provided either of which may be operative on cam follower 87a, a suitable change between the cams also being effected when the ca m shaft shogs.
  • a multiple number of cable boxes' may be mounted on the bars 38, 39 and each is capable of being dds-engaged automatically in said manner and independently o-f the others at any pre-set time, any number of either hand of cable boxes being in operation simultaneously.
  • the drop-stitch points 47P, 48P have channels 90, 91 and tips 92, 93 bent in opposite direction to the tips of the transfer points 42P, 43P for a purpose to be described.
  • TheV complete method of operation for this purpose is as follows with reference lirstly to the stage shown in FIGURE 1t).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Knitting Of Fabric (AREA)
US116711A 1960-06-14 1961-06-13 Straight bar knitting machines and method Expired - Lifetime US3246488A (en)

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GB20778/60A GB994521A (en) 1960-06-14 1960-06-14 Improvements in or relating to straight bar knitting machines

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US3246488A true US3246488A (en) 1966-04-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431752A (en) * 1966-08-12 1969-03-11 Colebrook Mills Inc Cable knitting method and apparatus
US3503227A (en) * 1967-05-17 1970-03-31 Cotton Ltd W Straight bar knitting machines
US3581526A (en) * 1966-05-23 1971-06-01 North American Rockwell Means for and method of forming design stitch patterns on knitting machines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1310256A (enrdf_load_html_response) * 1961-01-11 1963-03-06

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB852044A (enrdf_load_html_response) *
GB190920258A (en) * 1909-09-04 1910-04-28 Frederick Woodward Improvements in the Means for and in the Method of Knitting on Straight Bar Rib Knitting Machines.
GB191030227A (en) * 1910-12-29 1911-10-12 Robert Pringle Improvements in or relating to Knitting Machines, the Fabrics Produced thereon and the Method of Producing the same.
US1246797A (en) * 1915-12-03 1917-11-13 Nolde & Hoist Co Drop-stitch mechanism for full-fashioned knitting-machines.
US1721390A (en) * 1928-12-12 1929-07-16 Frank B Firth Knitted fabric
US1982800A (en) * 1932-03-29 1934-12-04 Louis Hirsch Textile Machines Method of knitting fabric
US2286805A (en) * 1940-06-04 1942-06-16 Wildt & Co Ltd Circular knitting machine
US2844951A (en) * 1956-03-13 1958-07-29 Textile Machine Works Means for forming dropped loops in fabric blanks
US2923142A (en) * 1956-02-07 1960-02-02 Walter M Golaski Knitting machine
FR1239166A (fr) * 1958-10-28 1960-08-19 Cotton Ltd W Perfectionnements aux métiers à tricoter rectilignes
US3004415A (en) * 1960-04-01 1961-10-17 Walter M Golaski Cable stitch attachment for knitting machine

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB852044A (enrdf_load_html_response) *
GB190920258A (en) * 1909-09-04 1910-04-28 Frederick Woodward Improvements in the Means for and in the Method of Knitting on Straight Bar Rib Knitting Machines.
GB191030227A (en) * 1910-12-29 1911-10-12 Robert Pringle Improvements in or relating to Knitting Machines, the Fabrics Produced thereon and the Method of Producing the same.
US1246797A (en) * 1915-12-03 1917-11-13 Nolde & Hoist Co Drop-stitch mechanism for full-fashioned knitting-machines.
US1721390A (en) * 1928-12-12 1929-07-16 Frank B Firth Knitted fabric
US1982800A (en) * 1932-03-29 1934-12-04 Louis Hirsch Textile Machines Method of knitting fabric
US2286805A (en) * 1940-06-04 1942-06-16 Wildt & Co Ltd Circular knitting machine
US2923142A (en) * 1956-02-07 1960-02-02 Walter M Golaski Knitting machine
US2844951A (en) * 1956-03-13 1958-07-29 Textile Machine Works Means for forming dropped loops in fabric blanks
FR1239166A (fr) * 1958-10-28 1960-08-19 Cotton Ltd W Perfectionnements aux métiers à tricoter rectilignes
US3100975A (en) * 1958-10-28 1963-08-20 Cotton Ltd W Straight bar knitting
US3004415A (en) * 1960-04-01 1961-10-17 Walter M Golaski Cable stitch attachment for knitting machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581526A (en) * 1966-05-23 1971-06-01 North American Rockwell Means for and method of forming design stitch patterns on knitting machines
US3431752A (en) * 1966-08-12 1969-03-11 Colebrook Mills Inc Cable knitting method and apparatus
US3503227A (en) * 1967-05-17 1970-03-31 Cotton Ltd W Straight bar knitting machines

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GB994521A (en) 1965-06-10

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