US1977522A - Knitting machine - Google Patents

Knitting machine Download PDF

Info

Publication number
US1977522A
US1977522A US605520A US60552032A US1977522A US 1977522 A US1977522 A US 1977522A US 605520 A US605520 A US 605520A US 60552032 A US60552032 A US 60552032A US 1977522 A US1977522 A US 1977522A
Authority
US
United States
Prior art keywords
cam
thread
knitting
needles
machine
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
US605520A
Other languages
English (en)
Inventor
Mills Robert Kirkland
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.)
HOSIERY DEVELOPMENTS Ltd
Original Assignee
HOSIERY DEVELOPMENTS 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 HOSIERY DEVELOPMENTS Ltd filed Critical HOSIERY DEVELOPMENTS Ltd
Application granted granted Critical
Publication of US1977522A publication Critical patent/US1977522A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/06—Non-run fabrics or articles

Definitions

  • KNITTING MACHINE Filecmpril 15. 1952 12 sheets-sheet s o l 57a @et 16, 1934n R. K. MILLS 1,977,522 KNITTING MACHINE FiledApril 15, 1932 12 sheets-sheet 7 5a) f6; r-*mn g wwf/WOR /M A WOR/V527;
  • This invention comprises improvements in f knitting machines and in the Lproduction of articles thereon, the main object of the invention being to produce stockings, socks and the like composed of or embodying knitted fabric which is immune or practically immune from laddering or roving.
  • the present invention provides a knitting machine incorporating means for automatically manufacturing throughout a complete seamless stocking or sock embodying ladder- ⁇ proof or ladder-resisting, fabric composed of locked or tied knitted stitches.
  • cam mechanism for producing the locked or tied stitches andthe thread feed associated therewith are withdrawn from operation automatically during reciprocation of the machine, e. g. during the knitting ⁇ of the heel and toe portions of a stocking or sock.
  • a sinker cam device associated with said needle-operating cam device is simultaneously and automatically moved into and out of operation.
  • 'Ihis sinker cam device may advantageously have associated therewith means whereby same can be adjusted both circumferentially and radially of the machine.
  • Figure l illustratesin perspective the upper side of a needle cylinder and sinker carrier of a circular knitting machine, the sinker cam carrier, latch ring being omitted to show clearly the motion imparted to' the needles when producing ordinary and locking stitches in succession.
  • Figure 2 shows a double latch needle suitable 70 for use on the machine in accordance with this invention.
  • Figure 3 illustrates diagrammatically a. de- ⁇ velopment of a suitable needle-operatingl cam system for ilse in the machine.
  • Figure 4 is a diagrammatic plan view illustrating the relative disposition around the needle cylinder of the cams shown in Figure 3.
  • Figure 5 illustrates in side elevation one construction of automatically displaceable needleoperating cam mechanism for producing locked or tied stitches.
  • Figure 6 is a plan View of Figure 5 showing the cam mechanism in the operative position.
  • Figure 7 is an interior elevation, somewhat 85 enlarged, of the cam mechanism shown in Figures 5 and 6, the path traversed by the needle butts being indicated.
  • Figure 8 is a sectional elevation on A-A of Figure '7.
  • Figure 9 illustrates in elevation mechanism for imparting motion to a sinker cam which operates inconjunction with the locked stitch needle-operating cam mechanism shown in Figures 5 to 8.
  • Figure 10 is a plan of Figure 9.
  • Figure 1l is an enlarged plan view of a part of the mechanism shownjn Figure 10.
  • Figure 12 is an enlarged underside plan view of the sinker cam ring and cam mechanism operating upon the sinkers at the position of locked stitch production.
  • Figure 13 is an enlarged detail view in verticalsection illustrating a sinker cam c oacting with a sinker at that position in the machine -where a new thread is being drawn by a retracting needle for producing a locked stitch.
  • Figure 14 illustrates in part sectional'elevation a thread feed associated with a locked stitch needle-operating cam and means for. controlling the movement of said feed.
  • Figure 15 is a plan of Figure 14.
  • Figure 16 is an enlarged sectional elevation through the thread feed shown in Figure 14.
  • Figure 17 illustrates in elevation mechanism applied to a stocking producing machine for automatically adjusting the sinker cam carrier circumferentially relatively to the sinker carrier to maintain a constant feeding position of thread between the needle latches for producing locked stitches.
  • Figure 18 is a further elevational view of part of the mechanism shown in Figure 17 and looking in the direction indicated by arrow X.
  • Figure 19 is a plan of Figure 18.
  • FIG. 20 illustrates in vertical section yarn trapping and cutting mechanism for use on the machine.
  • Figure 21 is a plan view of the trapping and cutting mechanism.
  • Figure 22 illustrates in elevation mechanism for producing tuck stitch mock fashion marks in stockings knitted on the machine, such mechanism being shown in an operative position.
  • Figure 23 is a plan view of Figure 22.
  • Figure 24 is another elevational view of the major part of Figure 22 showing same in the inoperative position.
  • Figure 25 shows in part-sectional elevation fabric draw-off mechanism with means for automatically discontinuing the draw-01T during reciprocation of the machine.
  • Figure 26 is a part-sectional elevation looking in the direction of arrow Y in Figure 25.
  • Figure 27 is a view in elevation, illustrating a knitting machine with the several improvements which characterize the present invention, assembled in co-operative relationship with each other.
  • a circular knitting machine wherein all or selected of the needles employed are provided with a plurality, e. g. two independently pivoted latches spaced one below the other on the needle shank, a suitable needle 1 being illustrated in Figure 2 of the drawings, said needle having upper and lower pivoted latches 2 and 3 so arranged that when the top latch 2 is lowered and the bottom latch 3 raised the latter abuts against or overlaps the former and said top latch when raised closes on to the hook 4.
  • a plurality e. g. two independently pivoted latches spaced one below the other on the needle shank
  • a suitable needle 1 being illustrated in Figure 2 of the drawings, said needle having upper and lower pivoted latches 2 and 3 so arranged that when the top latch 2 is lowered and the bottom latch 3 raised the latter abuts against or overlaps the former and said top latch when raised closes on to the hook 4.
  • the stitch cam OC for producing the ordinary stitches is of any customary design and consequently needs no particular description here. y As aforestated, however, the production of locked stitches necessitates a specially constructed or designed cam device, and one suitable construction of such cam device and means for moving same into and out of operative position will now be described with particular reference to Figures 5, 6 and 7 of the accompanying drawings.
  • the cam device comprises four cam bits 5, 6, 7 and 8 all arranged for displacement radially of the machine, two of said bits 5 and 6 being mounted on a slidable block 9 and the remaining two bits 7 and 8 on a slidable block 10, said blocks 9 and l0 having tail pieces 9a and 10a respectively guided in their radial sliding movement Within fixed brackets 11 and 12.
  • the rst cam bit 5 rises to an extent sufficient to clear an old thread loop thereon below the top latch 2
  • the second cam bit 6 then lowers the needles slightly to bring said old loop between the latches so that upon the needles then being raised by the third cam bit 7 for receiving new thread the old thread loop functions to lower the bottom latch 3 and become cleared below same
  • the final cam bit 8 then operates to lower or withdraw the needles so as to take the thread between the two latches 2 and 3 and move to the knocking-over position, at which position the new thread has become tied about the old thread loop which is still in the needle hook as aforestated.
  • the needles in one half of the cylinder may be provided with long butts and the remainder with half butts in the manner customary in circular machines for knitting stockings where a proportion of the needles are raised out of action for knitting by reciprocation during the heel and toe.
  • the inward movement is accomplished in two steps through lever mechanism from the main cam drum 13 of the machine. The first step is effected during the time the short butts are passing the cam and causes said cam first to coact with and operate the long butt needles, the second step being effected to complete the inward movement while the cam is coacting with said full butts, thus causing said cam to operate both long and short butt needles.
  • the locked switch cam may be approximately half the thickness of the normal stitch cam. The withdrawal of the cam is effected in one motion.
  • the locked stitch cam device is projected into and normally retained in its operative position by springs 14 ( Figure 8), a screw adjustment 15 accurately determining the extent to which the cams are projected, and the radial displacement 45 before-described is inoperative.
  • each of the two cam blocks 9 and 10 to withdraw the cams out of operation may be eected through the intermediary of two longitudinally slidable bars 16, 17 each having a bevelled end face coacting with an upstanding stop or the like 18 associated with each tail piece 9a. 10a of the sliding blocks 9, 10, or with a roller 18a on said stop.
  • the opposite end of each of the two bars 16, 17 is furnished with a roller or gag; 19, each truck coacting with the upper curved or bevelled end of a vertically or substantially vertical lifting rod 20, two of such rods being provided, one appertaining to the bar 16 and the other to the bar 17.
  • the lower end of each lifting rod 20 (which may be bevelled) coacts with the cam drum 13 on which are provided two suitably spaced cam rises 13a.
  • the cam rises 13a as (aforesaid, furnish two steps so that the falling movement of the lifting rods 20 from their respective cam rises 13a is accomplished in two steps and permits of the cam springs 14 effecting an initial movement of the locked stitch cam device while same coacts withthe short butts and a final movement while said cam coacts with the long butts.
  • a sinker cam is also moved radially into and out of operation in synchronism with the radially displaceable locked stitch cam above-described.
  • the sinkercam 21 ( Figures 11, l2 and 13) is secured on the underside of aradially displaceable carrier plate 22 which is guided inA its movement in xed guides 23, a plate or portion 24 intermediate the carrier 22 and cam 21 coacting with a peripheral flange 25 to determine the degree of outward movement of the carrier and cam, while an adjustable screw step 26 on the carrier 22 is also adapted to coact with said flange 25 to determine the degree of inward movement of the sinker cam.
  • the sinkercam is so shaped that when same is fully projected inwardly the butts 27a of the sinkers 27 travel round the machine without being effected by said cam, it being understood that the sinker cam is moved to its inwardly projected or inoperative position when the locked stitch cam
  • pivoted lever mechanism is provided operated by a lifting rod 28 from the aforesaid cam drum 13.
  • a centrally pivoted lever 29 is connected at its one extremity to an upstanding pin 30 on the sinker cam carrier 22 and coacts at its other extremity with an adjustable screw stop 31a provided on an arm 31 connected to a vertical pivot or rotatable member 32 to the lower end of which member is connected a second arm 33 coacting at its extremity with the upper curved or bevelled end/of the liftngrOd 28.
  • a spring 34 associated with the upstanding pivot 32 serves to maintain the arm 33 in engagement with the upper end of the lifting rod 28, while a second spring 35 associated'with the pivot of the lever 29 maintains one end of said lever in engagement with the stop on the arm 3l and also functions normally to press the sinker cam 21 and its carrier into the inwardly projected position.
  • a screw-threaded spindle 36 terminating in a head 80 37 is mounted within an, axially rotatable element 38 on the carrier plate 22, the threaded portion of said spindle 36 being screwed through an enlarged head 39 of a pin 40 which projects down through an arcuate slot 41 in the carrier 85 22 and is screwed into the sinker cam 21.
  • the head 39 of the pin 40 is traversed axially on said spindle andthe cam 21 thereby adjusted circumferentially of the machine.
  • One or more additional headed screws 42 passing through an elongated slot or slots 43 in the carrier 22 and screwed to the cam 21 function to assist in the guiding of said cam during its adjustment.
  • an auxiliary sinker 100 cam 44 may be provided ( Figure 12) adapted to operate on the sinkers at or adjacent to the position where the needles commence their downward or thread-drawing motion on the lock stitch cam.
  • This auxiliary cam 44 conveniently comprises 105 y a small arm or lever pivoted at its one end and having a curved or inclined inner face adapted, when said arm is pressed inwardly, to coact 'with and push forward the sinkers to a small degree so as to press the old loops firmly on to the needle shanks.
  • this auxiliary sinker cam 44 is advantageously effected automatically by the radial movement of the main sinker cam 21 acting in conjunction with the locked stitch 115 cam.
  • This,J may be effected through a short centrally-pivoted lever 45 coacting at its one end,- preferably by an adjustable screw 46, with the radially guided sinker cam carrier 22, and bearing at its other end upon a spring-pressed plunger 47 connected to the auxiliary sinker cam 44.
  • a thread feed associated with said cams is moved into and ing this the thread feeder may comprise a vertically guided and displaceable plate member 48 adapted to be depressed from the non-feeding position to the feeding position against resistance of a spring 49 ( Figure 16) by a lever 50 which extends substantially horizontally from and is pivoted about a spindle 5l which constitutes the common axis or fulcrum for pivotally dsplaceable thread feeders 52 serving to feed thread to the needles at the position of the ordinary or unlocked stitch cam.
  • the feeder 48 associated therewith is maintained depressed by causing a lifting lever 53 to coact with and ride upon a cam rise 54 on the aforesaid cam drum and press upwardly upon a tail portion 50a of the aforesaid pivoted.
  • lever 50 coacting with the said feeder.
  • the cam and feeder are to be withdrawn from operation,-say for example when the machine recipro- 150 cates for producing the heel and toe of a stocking,-the lifting lever 53 moves off the cam rise 54, thus permitting the pivoted lever 50 to swing up under the influence of a spring 55 and releasing the thread feed 48 which is raised by its associated spring 49.
  • the movement of the feeder can be adjusted by a screw device 56 on the coacting pivoted lever 50.
  • the present invention includes means whereby simultaneously with the aforesaid progressive v rtical adjustment of the needle cylinder an sinkers relatively to the needles and needle-operating cams,
  • the thread fed from the feeder associated with the locked stitch cam LC extends downl at an incline and bears upon or coacts at the feeding position withrthe top inclined edge or face of a certain number of sinker nebs or noses, which sinkers are at this position being gradually retracted from the needles by the sinker cam 21. It will, therefore, be appreciated that the degree of advancement of the sinkers, i. e.
  • the radial position of the sinkers relatively to the needles determines the height at which the thread is laid on the needles, it being understood that the further the inclined thread-engaging sinker nebs project radially inwards, the higher will be the position at which the thread is fed on the needles, and the greater will be 'the amount of thread drawn by sinker nebs due to said thread being drawn over a greater number of sinkers.
  • the needle cylinder and sinkers are gradually moved down relatively to the needles during knitting of a stocking panel towards the foot for the purpose of tightening the stitches, the height of the feeding position of thread between the needle latches is varied and a gradually decreasing amount ofsaid thread drawn.
  • the sinker cam 21 which effects the retraction of the sinkers at the feeding position is gradually displaced circumferentially of the machine during the aforesaid stitch-tightening operation, said circumferential displacement being such that as the height of the sinkers is varied the degree of radial projection th'ereof is adjusted so that the actual feeding height of the thread over the sinkers on a needle and the draw of said thread is maintained constant.
  • a tapered nose 57a on a lever 57 is gradually projected in between the face of a projecting lug 58 on the circumference of the sinker cam carrying ring 59, Oor an vadjustable screw 60 carried by the said lug 58, and an opposed face of a xed part 61 such as the vertical bracket carrying the customary latch ring, the projection of said tapered member 57a causing the said cam ring 59 to be rotated gradually to alcomparatively small extent simultaneously with the vertical adjustment of theV needle cylinder and sinkers.
  • the movement of the tapered member 57a is effected from the same mechanism as that by which the vertical adjustment of the cylinder and sinkers relatively to the needles is accomplished.
  • a lever 63 having a screw or part 64 coacting with said cam has upwardly extending rod 65 which passes at its upper part freely through the bed-plate of the machine.
  • this rod 65 is adjustably pivoted by pinand slot connection to the lower part of the lever 57 which may be of substantially Z-shape which is pivoted between its ends to a relatively stationary part,vthe upper part of said lever projecting inwards radially of the machine cylinder and terminating in the aforesaid tapered or bevelled nose 57a.
  • the progressive vertical adjustment of the needle cylinder and sinker carrier may be effected in the known manner from the cam 62 through the lever 63 which is suitably connected to an arcuate lever 67 pivotal about a shaft or spindle 68, the arcuate lever 67 having adjustably connected thereto the lower end of an upwardlyextending member 69, which in turn is suitably connected to the needle cylinder and 115 pivotally connected thereto the lower end of an rant 73 thereby produced oscillation of the lever 71 to operate the pawl and ratchet device 70.
  • the trapper plate is shown at 74 on which are mounted the customary spring or resilient trapping elements 75, 76, beneath which threads fed from ordinary thread feeders operating in the usual feeding throat 77 are passed and trapped, an additional pivotally mounted trapping element 78 being also provided for said threads. sever these threads are provided at 79, and the operation of said cutters is effected in the known manner from a rise or ⁇ step 80 on the main cam drum or its equivalent through a suitable rodl or lever 81 adapted to coact with said step 80 and the end of a lever 82 pivoted between its extremities at 83 and having connected thereto a vertically slidable member 84.
  • This slide 84 carries one of the cutting elements and the pair of cutters 79, the other element of said pair being stationary.
  • the lever 82 is displaced to lower the slide 84 and by means of a pin 85 moving' with said slide oscillate the pivoted trapping member 78 to lift same and permit thread to pass thereunder; the cutters 79 being simultaneously opened.
  • the pivoted spring-influenced trapper 78 is released to trap the thread and the cutters 79 are operated to sever same.
  • an additional resilient trapping strip or element 86 having an upturned end which permits of the thread fed from the locked stitch feeder 48, located at the throat 87 passing beneath said element 86 so as to be trapped thereby.
  • the additional cutter device for the locked stitch thread is constituted by a pair of cutter blades 88 one of which is stationary, while the other is suitably connected to the aforesaid vertically sliding member 84.
  • the rise or step 80 operates through the rod 81, lever 82 and slide 84 to open the cutters 88 and simultaneously lift a pivotally displaceable springinuenced trapper 89, the thread being drawn round beneath the two trapping elements 86 and 89 and between the cutter blades 88. 'Ihe falling of the rod 81 from the step 80 then operates the pivoted trapper 89 and cutters 88 as beforedescribed with reference to the ordinary thread trapping and cutting device.
  • the invention also includes the production of tuck stitch mock fashion marks in a stocking or Ythe like, by lockingor tying the tuck stitches
  • the selected needles onforming said marks. which the tuck stitches are to be produced, are provided with long butts which at the required time are engaged by an inwardly projected inclined cam element 93 which is located at the position immediately in front of the thread feed appertaining to the ordinaryor unlocked stitch cams OC and operates to impart a downward movement toi said selected 'needles so that same will not rise to a clearing height but will take new thread and ,also retain the old loops, said selected needles carrying the two loops then passing on to the second or lock stitch cam LC and feeder so as to lock or tie the tuck stitch produced at the preceding cam OC.
  • the spindle 100 is keyed or otherwise xed a crank arm 101 having a lug or nose portion 102 at its free end adapted to coact with a travelling chain 103,..on which chain isl provided a series of upstanding links or bits 104.
  • a further crank arm 105 on which is formed or provided an arm. or extension 106 suitably shaped so as to project at its free end be neath a horizontal or substantially horizontal bar 107 to which reciprocation is continually imparted from the customary toothed quadrant 73 provided on the machine.
  • the reciprocating bar 107 has adjustably or otherwise secured thereto a plate portion 108 with bevelled face 108a.
  • the toothed quadrant 73 is customarily provided on a seamless stocking machine for imparting reciprocating motion tothe needle cylinder during the production of the stocking heel and toe, and the motion imparted .to said quadrant is usually such that the time taken in completing a to and fro movement of the quadrant is equal or approximately equal to the time taken for four complete revolutions of the cylinder when circular or tubular knitting is being effected.
  • the cam 93 can be timed to operate on the selected needles o n every fourth course during tubular or circular knitting. 4
  • Means are also incorporated in the present invention for interrupting the drawing-off or takeup of the knitted fabric during the reciprocation of the machine, e. g. during the production of the heel and toe of a stocking, thereby preventing drag on said fabric and possible distortion thereof.
  • the drawing-off mechanism is advantageously of the known type comprising a pair of circumferentially-engaged rollers 110, either or both of which may be felt covered and/or plated, said rollers being rotatably mounted at the lower part of the usual fabric or web tube 111 so that the said fabric passes between same.
  • These rollers 110 are intermittently rotated during the circular motiony of the machine so as to withdraw the fabric step by step down the tube.
  • the intermittent rotation of the take-up rollers -in opposite directions may be effected by the known mechan ism embodying a vertically slidable T-plate or bar 112 carrying a pair of suitable pawls 113 which coact with a pair of ratchet wheels 114 mounted one at the extremity of each of the takeup roller spindles.
  • the pawl-carrying member 112 is vertically reciprocated to rotate the ratchets and rollers associated therewith in opposite directions and thereby draw the fabric downwardly between said rollers.
  • the take-up rollers are resiliently pressed into engagement with each other by spring plungers or the like.
  • cam element 115 when the machine is reciprocating, the cam element 115 is retained in a position wherein same does not engage with the member 112, the take-up rollers 110 are retained from rotation on their axes and the drawing off of the fabric is discontinued.
  • a suitably mounted cam disc 116 or the like is provided which rotates once during the production of a complete stocking or sock, said cam having circumferential recesses 116a therein.
  • this cam disc 116 Adapted to ride on the circumferential face of this cam disc 116 is an arm or part 117 connected at the one end of an approximately horizontally disposed lever 118 pivoted between its extremities, the opposite end of the said lever 118 being bevelled and coactingwith an oppositely bevelled end of a further approximately horizontal lever 119 also pivoted between its extremities.
  • This last named lever carries at its opposite end an adjustable pin or stud 120 which is adapted to bear upon a spring-pressed plunger 121 carried by and projecting up from the pivoted cam lever or arm 115 which is adapted to coact with the beforementioned vertically displaceable pawl carrying member 112 coacting with the ratchets on the take-up rollers 110.
  • the arm 117 coacting with the rotating cam disc 116 enters one of the recesses or depressions 116a in the circumferential face of said disc, and in so doing the pivoted cam element 115 is raised under the influence of a spring associated with the plunger 121 to a position wherein the pawlcarrying member 112 will not be engaged by said cam; and in this way the reciprocation of the pawl-carrying member is prevented and the takeup of the fabric is interrupted.
  • the take-up recommences as soonas the arm 117 or the like coacting with the cam disc 11 is moved out of a recess 116a in said disci f
  • additional or reinforcing threads can be introduced at predetermined intervals by the employment in thev machine of additional displaceable thread feeders in a inanner well-known in seamless stocking and other knitting machines.
  • additional or reinforcing threads can be introduced in the heel and toe of a stocking and a different re-inforcing thread or threads in the sole in accordance with customary practice.
  • a machine according to the present invention may embody well-known mechanism and automatically produce a pocket heel and a pocket toe, the machine operating to produce sequentially a tubular leg, a pocket heel, a tubular foot, and a pocket toe, all in the order stated; and in a stocking or sock, so produced, it will be understood that the part or parts of the article to be composed of non-ladder or locked stitch fabric can be variably determined to suit desired requirements. For example, the entire stocking or sock, with the exception of the heel or toe, may be composed of locked stitch fabric.
  • a circular knitting machine for manufacturing seamless stockings, socks and the like comprising, in combination, a knitting cam operating to produce locked or tied stitches, a knitting cam operating to produce ordinary or normal stitches, a separate thread feed appertaining to each of said knitting cams, means whereby the knitting cam for producing locked stitches and its associated thread feed are automatically displaced to an inoperative position when the machine commences reciprocation, e. g. when commencing to knit the heel and toe portions of a stocking., or sock, and means whereby said locked stitch knitting cam and associated thread feed are automatically brought into 'operation at the termination of said reciprocatory motion, the knitting operation by the ordinary stitch mechanism being uninterrupted by the displacement of the locked stitch knitting cam ⁇ 2.
  • a circular knitting machine comprising in combination a plurality of latches pivoted one below the other on the needle shank, a knitting cam operating upon said needles to produce locked or tied stitches, a ⁇ knitting cam operating upon the needles to produce ordinary or normal stitches, a thread feed associated with each knitting cam, a sinker cam associated with a locked stitch knitting cam, means for radially displacing' the locked stitch knitting cam and its associated sinker cam into and out of operative position, and means for moving into and out of operation in synchronism the lockedl stitch knitting cam and its associated sinker cam and thread feed at predetermined intervals without interfering with the continued knitting operation by the ordinary stitch cam.
  • an auxiliary cam operated automatically by the radial movement of the main sinker cam associated with the locked stitch knitting cam, said auxiliary cam coacting with the sinkers to cause same to press stitch loops cleared below the bottom latches of the needles tightly against the needle shanks at the time said needles.
  • means for gradually and progressively adjusting the height of the needle cylinder and sinker carrierI relatively to the cylinder needles during the knitting of a stocking leg for producing a gradual stiffening or tightening-up of the knitted stitches means whereby simultaneously with the said progressive vertical adjustment the sinker cam associated with the locked' stitch knitting cam is adjusted relatively to the sinker carrier by gradual and progressive motion circumferentially of the machine, said; circumferential adjustment of the sinker cam being automatically effected by a gradual radial movement of a tapered element between a part moving with the sinker cam carrier and a relatively stationary part, and
  • vmeans for raising and maintaining in an inoperative position a fraction of the complete row of needles during reciprocation of the machine two additional radially projecting earn elements adapted during reciprocation to coact with butts on the raised inoperative needles and lift same toa higher level prior' to thread feeding, one of said cam elements operating on the needles when moving in one direction and the second cam operating on the needles when moving in an opposite direction, and said two cam elements being radially adjustable or displaceable.
  • a circular knitting machine comprising needles having a plurality of latches pivoted one below the other on the needle shank, a knitting cam operating upon said needles to produce locked or tied stitches, a knitting cam operating upon the needles to produce ordinary or normal stitches, a thread feed associated with each knitting cam, a sinker cam associated with a locked stitch knitting cam, the locked stitch knitting cam and its associated sinker cam being radially displaceable into and out of operative position, means for moving into and out of operation in synchronismthe locked stitch knitting cam and its associated sinker cam and thread feed at predetermined intervals without interfering with the continued knitting operation by the ordinary stitch cams and means for interrupting the drawing-off or take-up of thel knitted fabric during reciprocatory motion Aof the machine.
  • a circular knitting machine as claimed in claim 9 including intermittently and oppositely rotating rollers between which the fabric is drawn off, cam-operated lever mechanism functioning periodically to interrupt the rotation ofsaid rollers, said cam-operating lever mechanism functioning normally to press a spring-iniiuenced cam element to a position wherein same is engaged at each revolution of the machine by a spring-influenced sliding member carrying a pawl or pawls coacting with ratchets to impart intermittent rotation to the drawing-off rollers, and said cam-operated lever mechanism also functioning at predetermined intervals to release said spring-influenced cam element and allow same to move to a position wherein the said pawl and ratchet device is rendered inoperable and the fabric draw-01T stopped.
  • a circular knitting machine for the automatic production of seamless stockings or socks embodying needles, a knitting cam operating upon said needles to produce locked or tied stitches, a knitting cam operating upon the needles to produce ordinary or normal stitches, a thread feed associated with each knitting cam, a sinker cam associated with a lockedstitch knitting cam, the locked stitch knitting cam and its associated sinker cam being radially displaceable into and out of operative position, means for moving into and out of operation in synchronism the locked stitch knitting cam and its associated sinker cam and thread feed at predetermined intervals without interfering with the continued knitting operation by the ordinary stitch cam, trapping and severing means for the thread fed at the ordinary knittingcam, separate trapping and severing means for the thread fed at the locked stitch knitting cam, and means for automatically interrupting the fabric draw-off during reciprocation of the machine.
  • a circular knitting machine for automatically 'manufacturing throughout a seamless stocking, sock or the like and comprising, in com bination, a knitting cam operating to produce ordinary or normal stitches, a knitting cam operating to produce locked or tied stitches, separate thread feeding means appertaining to each of said knitting cams, means whereby said two knitting cams and their thread feeds cooperate to produce normal stitches and locking or tying stitches on the same needles, and means whereby the knitting cam and its associated thread feed for producing locked stitches are automatically rendered operative and inoperative at predetermined times without interfering with the continued knitting operation by the ordinary knitting cam.
  • a circular knitting machine for automatically manufacturing throughout a seamless stocking, sock or the like and comprising, in combination, two knitting cams and a separate thread feed associated with each cam, said two cams operating in succession on the same needles to produce normal stitches and stitches which lock or tie said normal stitches by passing thread loops through and closely around other thread loops, and means whereby the knitting cam and its associated thread feed for producing locked stitches are automatically rendered operative and inoperative at predetermined times without interfering with the continued knitting operation by the ordinary knitting cam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Socks And Pantyhose (AREA)
  • Knitting Machines (AREA)
US605520A 1931-04-18 1932-04-15 Knitting machine Expired - Lifetime US1977522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11534/31A GB376837A (en) 1931-04-18 1931-04-18 Improvements in circular knitting machines and in articles produced thereon

Publications (1)

Publication Number Publication Date
US1977522A true US1977522A (en) 1934-10-16

Family

ID=9987995

Family Applications (1)

Application Number Title Priority Date Filing Date
US605520A Expired - Lifetime US1977522A (en) 1931-04-18 1932-04-15 Knitting machine

Country Status (3)

Country Link
US (1) US1977522A (fr)
FR (1) FR736338A (fr)
GB (1) GB376837A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013417A (en) * 1959-01-13 1961-12-19 Patent Hose Corp Knitting machine stitch length control
US4187700A (en) * 1977-11-03 1980-02-12 Borg Textile Corporation Latch guard and deep pile fabric circular knitting machine fitted therewith

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4688402A (en) * 1986-08-29 1987-08-25 Huang Kuo Ching Knitting machine transmission mechanism assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013417A (en) * 1959-01-13 1961-12-19 Patent Hose Corp Knitting machine stitch length control
US4187700A (en) * 1977-11-03 1980-02-12 Borg Textile Corporation Latch guard and deep pile fabric circular knitting machine fitted therewith

Also Published As

Publication number Publication date
FR736338A (fr) 1932-11-22
GB376837A (en) 1932-07-18

Similar Documents

Publication Publication Date Title
US3148518A (en) Multi-feed knitting machine
US2012607A (en) Knitting machine
US3252307A (en) Yarn severing means for knitting machines
US2711090A (en) Plate and wrap yarn control means and method
US1977522A (en) Knitting machine
US2117208A (en) Machine and method for making knitted fabric
US2056686A (en) Production of knitted fabric
US2258569A (en) Method of and machine for producing knitted fabrics
US1947617A (en) Reciprocatively operated knitting machine
US1863720A (en) Knitting machine and method of knitting
US2115929A (en) Knitting machine and method of knitting
US1317897A (en) scott
US2082751A (en) Mechanism and process for effecting reverse plating
US2933908A (en) Selvage clipper
US1951102A (en) Circular knitting machine
US2185844A (en) Method and means for producing knitted elastic fabrics
US2500337A (en) Attachment for circular knitting machines
US3487660A (en) Dial and cylinder knitting machine
US3186191A (en) Pattern mechanism for circular knitting machines
US2913886A (en) Apparatus and method for knitting elastic fabric
US3041860A (en) Means for and method of operating the sinkers of knitting machines
US2191577A (en) Method of and apparatus for knitting stockings
US3776000A (en) Knitting of stocking toes on circular knitting machines
US2146750A (en) Knitting machine
US1673764A (en) Machine for knitting split fabric