US2698531A - Knitting machine - Google Patents

Description

Jan. 4, 1955 P. w. BRIS-row KNITTING MACHINE 17 Sheets-Sheet l Filed Dec. 30. 1948 Jan. 4, 1.955

Filed D661.v 30. 1948 P. W. BRISTOW KNITTING MACHINE 17 Sheets-Sheet 2 ATTORNE S Jan. 4, 1955 P. w. BRlsTow 2,698,531

KNITTING MACHINE VFiled Dec. so, 194e 17 sneetsheet :s

10s ma 195 JNVENTOA 18a ATTORNEY Jan. 4, 1955 .fn w. BRIS-row 2,598,531

KNITTING MACHINE Filed Doc. 30. 194B 17 Sheets-Sheet 4 S E 5 6 TT M mw m5 .m G V/ 6 mOn A M/U. \|/1 F fw B Y 22),--- a O W 2A./ L mi u AUH 5 1 1.1. Y 2 H- Z PB F ML l El .w m F 2 0 6. mmm 1 1f., l G ll. F m m Jan. 4, 1955 P. w. BRIS-row KNITTING MACHINE 17 snetsfsneet 5 Filed Dec. 30, 1948 INVENTOR. PAUL W.- BRSTOW ATTORNEYS 1'7 Sheefs-Sheet 6 P. W. BRISTCW KNITTING MACHINE Jan. 4, 1955 Filed Dec. 30. 1948 Jan. 4, 1955 P. w. BRI'sTow 2,698,531

KNITTING uAcHINE Filed Dec. 30, 1948 l 17 Sheets-Sheet 7 mmumlnmmmmmnr- 408 40S-F 4. l -414 40G-f( E@ l; -E 410/ 402 i E BY uw m7 ATTORNEYS Jan. 4, 1955 P. w. BRls'row KNITTING MACHINE 17 Sheets-Sheet 8 Filed Dec. 50, 1948 INVENTOR.

PAUL W BR/STOW BY /m las,

ATTORNEY Jan. 4, 1955 P. w. BRIS-row 2,698,531

KNITTING MACHINE Filed Dec. so. 194e 17 sheets-sheet e 484 486 .1w l; 49? 50e l l l 490 292 l I l l I Il 496 I ff@ 1w 50o l 502 L l V .L 49a INVENTOR.

PAUL W. BR/S'TOW ATTORNEY P. W. BRISTOW KNITTING MACHINE 17 Sheets-Sheet 10 5. G. l F

INVENToR. PA UL W BRIS TOW ATTORNE S Jan. 4, 1955 P. w. BRIS-row KNITTING MACHINE 17 Sheets-Sheet 11 Filed Dec. 30, 1948 F/G. I6.

INVENTOR. PAUL W- BRISTOW //nw? ATTORNE Jan. 4, 1955 P. w. BRlsTow 2,698,531

KNITTING MACHINE Filed Dec. 30. 1948 17 Sheets-Sheet 12 FIG. /7.

INI/Emol@ PAUL W BR/STOW BY FVG/9.

ATTDRNE S Jan. 4, 1955 P. w. BRlsTOw 2,698,531

KNITTING MACHINE Filed Dec. 30, 1948 17 Sheets-Sheet 15 55o 554 577 62 A n 5252 55a ,I 55o I l l l 522 555 53 51e| f 532 525 un o 55e y" i 585 V QQ l: 570 614 5s4 f 595 472 l638580 584 582 540 sos 58a 601 600 51 F/G. /a. 504 641 59o INVENTOR.

PAUL W BRIS TOW ATTORNEYS Jan. 4, 1955 P. w. BRIS-row 2,698,531

KNITTING MACHINE Filed Dec. 30. 1948 17 Sheets-Sheet 14 FIG. 22.

INVENTOR. PAUL W BR/S TOW BY ATTORNEYS Jan. 4, 1955 P. w. BmsTow KNITTING MACHINE 17 Sheets-Sheet l5 Filed Dec. 30. 1948 INVENTOR. PAUL W BRIS TOW RNEYS ATTO P. w. BRISTOW KNITTING MACHINE Jan. 4, 1955 17 Sheets-Sheet 16 Filed Dec. 3G, 1948 INVENTOR. UI. W. BRISTOW w,

ATTORNEY PA BY Jan. 4, 1955 P. w. sRlsTow 2,698,531

KNITTING MACHINE:

Filed Dec. so. 194s 17 sheets-sheet 1v mm @CINT/3% Paul W." Bstow,=Laconia,*N-. Hijassignorf toScott &

Williams, Incorporated,,LaconiagfNH., ya corporation of Massachusetts ApplicatiomDcembcr 13.0, 194,8, vSerialNtl- .68,114

azi-claims, j (clame-135) This inventionrelatestoiknitting methods andgmachines and has particular.- reference ytocircularr knitting i onY niachines of the superposed cylindcr'ype involving `provision for the making of Wrapjpatterns. a

One of the objects of -thepresentinventionis 'to provide improved wrapping methods and4 devices whetcbyclaborate patterning may be accomplished in particular involving the production of the. so-calledccolorrinfcolorwork. In accordance withgthe invention'ipairsfof wrapyarn carriers-,are associated .withteach othertfor the productionof multiplezcolor designs .with provision for mutual control of the wrap yarn carriers by-)each other resulting iu.sim=;A

plic'ity of operation.v

Afurtherobjectiof the invention relates to the provision of improved Vselective devicesparticularlyfor the control of needles. In accordance vwith this .aspect-of. the invention provision is made for the selection of dierent patterns to. be followed` in different Vportions lof a stocking. The improved-pattern selecting devices make possible, furthermore, ta considerable extension ofy the pattern selections which may be eected'by means-of trick wheels of limited circumferential'extent. ln' bref, .this is accomplished `by arranging'on a single vtriclewheela pluralityv of Aindepend- Vent patterns which may-be selectivelyfchosen orcaused to operate in sequence.

A further objectvof-theinventlon relates to the provision of a `safety lmechanism to disconnect a press-oifdraw thread mechanism when-makingplainffabric to avoid complete press-oils.

Still another object of the invention'is to provide'an improved slider controlled -stop :motion 'whichwill effect stoppage of the machine in the eventthateneedle control-v ling sliders accidentally assumefimproper positions.

These and otherobjects of'rthe'V invention particularly relating to detailsof-'construction landroperation will fbecome apparent from the followingdescriptionreadinlcon-l junction With 'the 4accompanyingdriawings1in'whiclar i Figure l isa vertical Vairial section `through th'eneedle cylinders and the associated Wrap ,yarn presenting mechansmof a 4knittingmachine embodyingthe princplesf the invention;

Figure 2 is a vertical sectionalyiew .tinuation of the upper end of Figure l;

`Figure 3 isa fragmentary planviewrshowing inparticular the mountingarrangement for various cams acting upon wrap yarn carriers;

Figure 4 is a vertical axial section :illustrating Viniparticular the arrangement of certain camsacting .upon wrap yarn carriers and the construction ofawrap vbornand adjacent parts;

Figure V5 is a `fragmentary .plangview .partly .invsection showing in particular. camsfor controlling-.outwardmovements of wrap lyarnvcarriers--and Ythe/controls .for `these cams;

Figure 6 -is an elevation ylooking :in the direction ,of the arrowtmarked 6 in Figure 5;

Figure 7 is `a developed inside elevationyof fvarious cams illustrated in Figure'S;

Figure 8 is a planview showing 4inpt n'ticular:pattern control means for the selection of needles;

Figure -9 Vis an elevation partly 'in-section., the elevation viewing the mechanism of Figure 8 in thedirectionindicated bythe arrow marked9 therein;

Figure l0k is an elevationtpartly insection showing*certain elements of Figure Vv8 Vviewed in-the :direction Aof the arrow marked 10 in Figure;

constituting a confwhich, in the formationofbroad ribs, are

=which, through gearing --indicated 2,698,531 Patented Jan. 4, 1955 Figure `1.1 is an elevationparrly inlsectouhowinaertainelements of .figure J8 as -.vie,wcdin,the Ydireetici! .9i thesarrowvllthereu; Y

Figure. z17.2 is an elevatioashgwins 'certain parts cil-:1395s .JS asviewedin me Qirectionnf Y,tne21-rnovi lllheren;

Figure. 1,3...is a Vnorizoutal Section-.showing lunar Ular certain safety ,intetlncldng de vicestdesisnied to ,P pressfpi when matting plainlsoks `Without trans; l needlesto the ,upper cylinder; t

an. elevatian .illustrating iieyiss f5 effecting ipterruptionof wrapping;

`Figurev 16 sa. elevationv tlthe. Sam@ lobkinsattihe right-hand .side of FigurelS;

Figure; 17 isa planfview-ofL the mechanism illustrated in Figures 15 and 176;..

Figure-18 is a planview showing variousdevicesffinthe machine particularly themounting of wrapping abutments,

x an arrangementffor, needle levelling and asliderl'controlled stop motion;

Figure 19 is antelevation-showingdetails of Vthep'mecllanisrn of Figura-:4718;

Figure 2U is 1an elevation showing in particular acoun- .terbalance,arrangementfor the wrapping assembly;

Figure 2l -is arfragmentary` elevation illustrating inipar- -ticular-.the lower-ends of a pair of wrap .yarnI carriers v,and means for maintaining them in their normal rest position;

Figures 22,1andfj23f. are; elevations llustratngsmpartcular 'the interrelationsa'asf a pair-o Wrapvara carriers, Certaincams for Operating-,these carriersibeins illustrated irl-section;

Figure 24 is adagiata-showing@ typical arrangement of butts for the controlof -wrapyarn carriers;-

-Figure 2J is `a plan-view `showing the assemblyof various .Cams .ffon-cqntrolling the y-nwvenients of iewrrap gram carriers;

Figures 26 27and,428 areplanviewsshowinggthefsame earns as are illustratedin'Figure 25 butin'particulai; Nillustrating these at different levels and showing rin diagraml the paths ofi-.butts acted -upon bythe cams; and4 Figure29 is an inside development lof*variouslcar'nsgfor control of rotatingpartsof the machine, certainof-these parts beingindicated in constructionllines.

'Il'iezknitting` machine embodying the inventionsvindicatedzabove fistgof thefsuperposed cylinder type comprising a lower cylinder 2 and an upper cylinder 3. Arrangedjto :slide in slots in..y the-lower cylinder'are sliderstadapte'd to vengage the lower hooksof double hook latch needless@ the `upper'hoolcsV of .which lare engageable byssliders- 1'8 sin -the uppercylinder.

The-.lower sliders, 4 .areiprovided with vbutts Yat two -levels wand 12 as .hereafter-more fully described. i Thcnipper sliders^8 'arefzprovided with butts at-two levels 16 and v18.

:The cylindersare preferably provided Awithiinserted fixed VWalls toidel'nesthe. slots forrecepton of the slidersand thesewalls 20 in thecaseof the upper-.cylinder terminate substantially above its lower end so that thelowerportions of the slider slotstare bounded-not by stationary Wallslbut by. -movable -wallsxof` two i alternative forms arranged'xfto slide in the wall slots in the upper cylinder. Y One setof these :indicated at` 22 carry butts '26 and are provided with outwardlyy and downwardly sloping lower ends as indicated most1clearly at '30 in Figures 23 and V29.` The-other--slidable walls indicated .at-'24 are provided with butts 28-and have vergebitextensions such asindicated at32 -in Figure The arrangement and functions ofjtheselower-ends 30 and the vergebits 32 will be hereafter described. VThe verge bits arelocated fbetween the positions of needles carried by: sliders in the yinvoercylinder.

The `cylinders are -rotated and -reciprocatedin unison through the medium of a AverticalV shaft 34 which,v through conventionalfgearingfis driven by the lower cylinder and at 40 Y Land 42, f drives Ltheupper cylinder.Y The present Vmachine additionally involves kthe driving of a wrappingassembly-which action Visfeffectedthrough gears 44 and.46, the former beingcarried by the shaft34;V

Arranged to ,cooperate with the needles are arcuate sinkers :48 which .are Vprovided withbutts-S arranged :to

`is indicated 'generally at 58 (Figure l).

be actedupon by stationarytcams 52 (see Figure 1) supported by a stationary cylinder 54 inside the lower rotating cylinder. This stationary cylinder 54 also supports the fabric'guiding tube 56.provided with an extension 57. The rotary support for the wrap yarn carrying means It is secured to the gear 46 and includes a member provided with an rounded pivot-forming projections 62 of wrap yarn car- As will appear hereafter,

located side by side in a slngle slot; if only one carrier is' desired'in a slot; the position of the other may be filled by a dummy carrier whichis similar to an active carrier "exceptthat it terminates short of a lower yarn-carrying end. It then may function to limit movements of the active carrier associated with it, in the fashion hereafter detailed. Each of the wrap yarn carriers 64 and 64 has an upper extension 68 received in a notch 70 in an individual jackv 72. These jacks 72 are provided with slots arranged so that they may embrace an annular ring 74 carried by the support 58. In order to guide the jacks 72 for radial movement and to position them in xed Y circumferential locations they are received in slots 76 in the support 58. Each of the jacks is provided with a plurality of butts 73. As will be evident hereafter,

'these butts may be selectively broken away so as to provide selection in the operation of the wrap yarn carriers.

Each ofthe wrap yarn carriers 64 and 64 is provided with a downward extension extending through the upper cylinder and guided Vat its upper end in a radial slot 80 in the support 58.V The lower spring band 82 serves to urge the lower ends of the wrap yarn carriers inwardly. Butts 84 are provided on the wrap yarn carriers to provide for thepositive inward movements of their lower ends and for the arrest of the outward movements of their lower ends.

At its lower end each wrap yarn carrier is provided with a radially directed extension 86 .which has a downwardly extending branch 87 provided with the yarn guiding openings 88. The downwardly extending branches v87 are provided with smooth lower inner edge portions 'arranged to cam the Wrap yarn downwardlyl as the wrap yarn finger or carrier is a Wrapping movement. Beyond these openings each carrieru is provided with an abutment-engaging extension VThe wrap-yarn carriers 64 and 64' differ from each Vother-.only in the fact that the carriers 64 are provided .with laterally extendingears 89 which, as is best indicated in Figure 2l, cause the lower ends of two closely adjacent carriers 64 and 64' supported in the same slot 80 in the support 58 to remain spaced from each other so that the wrap yarnspassing through the openings 88 are not subject to friction or snagging during the movements of the adjacent carriers relative to each other. The ears 89 are of such radial extent that during the limited relative radial movements of the adjacent wrap yarn carriers these ears are always in positionto maintain y the lower ends of the carriers circumferentially spacedl from each other.

` The wrap yarn carriers are prevented from having more than a limited radial relative movement by reason of Vtheir beng'provided with circular holes 91 inV which, in

the case of each pair of carriers, there is located a disc .93 which is of such smaller diameter than the holes 91 as will provide the desired limit of relative movement of the lower ends of thecarriers, for example, in a typicalcase Vannular groove 60, in which groove are received Vthe withdrawn inwardly following A the movementis limited to about a half inch. As a result Y of this construction, if one of the carriers is moved outwardly the other will follow it with a definite radial lag of movement of its lower end. In similar fashion the out- 4warrdgrnovement of one carrier of a pair may be limited by interruption of -As will become the outward movement of theV other. evidentxhereafter this interrelationship imposed on thev carriers is used in the 'control thereof. The thickness of each disc 93 is approximately double the thickness of the wrap yarn carriers Vand slightly less than the clearance provided byV the Vslotso that these discs oat in the Vopenings 91 and in the slots 80 without A,any possibility ofbeing disengaged from either. of the Ypair of associated wrap Ayarn carriers. A similar disc arrangement is provided in the case of an active wrap yarn carrier associated with a dummy carrier, outward movements of the active carrier being restrained by the dummy carrier through their common disc 93 when outward movement of the dummy carrier is limited by a cam. The interdependence of the movable carriers will be clear from Figures 22 and 23 to which more detailed reference will be made hereafter.

A tube 92, the Vupper vend of which is secured inthe assembly 58, carries at its, lower end a disc 94 which is provided with radial fins 96, the upper edges of which are turned, as indicated at 98, in a clockwise direction as viewed in plan (see'Figure 21).. These edges v98 pro` vide rests forV the purpose of definitely positioning the lower ends of the wrap yarn-carriers -which are exed in a counterclockwise direction as viewed in plane in order v to insure normal engagement with these edges. The disc 94 is notched as indicated at 95in the sole section thereof between the tins 96 for the free passage of wrap yarns which extend in a stockingY fromV a pointof interrupted wrapping above the heel, past the heel and other regions where wrapping does not occur. The wrap yarns then lie sufficiently inwardly not to interfere with other operations. f

Extending downwardly within the upper cylinder 3 is a stationary cylinder 100, this being interposed between the cylinder 3 and the wrap yarn carriers. The cylinder 100 is carried by a portion of the frame which supplies a lower bearing 101 for the rotating support 58. vThe specific mounting of this cylinder is later described.

An axially .extending rod 102 Vis guided for lengthwise movement through the tube 92 and carries at its lower end a fabric take-up. disc or pusher 104 provided with rounded lingers 106. i

The rotating wrap yarn carrying assembly includesva disc 10S on which are supported the wrap yarn bobbins 110, of which there is one for each wrap yarn, only one of these being illustrated in the interest of clarity in Figure l.v The wrap yarns pass from these bobbins through the individual tension devices V111 and take-up sweeps 113 and thence downwardly through tubes 116 about the lower edge of the cylinder 100 (when the wrap yarn guides are outwardly projected) and through the eyes 88 inthe individual wrap yarnrcarriers. The Ytension and take-upvdevices are of the type disclosed in the patent to Albert L. Oberholtzer, Number 2,506,968, dated May 9, 1950. l

The wrap yarn supporting means is so arranged as to permit the entire wrap yarn assembly to be raised clear of the upper cylinder and swung to one side to permit threading or other manipulations ,of the wrap yarn carriers. The particular means for effecting this result will now be described.

A stationary tube 118 carried by the machine frame acts as a vertical guide for a tubular post 120 slidable and rotatable therein, which post is provided with a bracket 122 limiting its lowermost position by engagement with a bracket 128 carried by the upper end of the tube 118. The post 120 carries an arm 130 which is provided with an extension 132 carrying a conical member 134 arranged tube 142 which extends downwardly and is secured at e itslower end to theV lower portion of the wrap yarn carrying assembly. Within the upper portion of the tube 142 is a cylindrical head 144 secured to the rod 102 previously mentioned. A pin 148 carried by the hub 149 of the disc 108 projects into a longitudinal slot 146 in the head 144 and so causes the head 144, the rod 102 and-the take-up'disc 104 to rotate with the wrap yarn assembly. When the rod 102 is in its uppermost position with respect to the assembly, with the disc 104 andthe ngers 106 housed in the dished lower surface of the disc 94, a spring controlled latch 152 is so arranged that it can be entered into an annularV slot 150 near the upper end of the head 144. (See Figures 8 and 9 of my Patent 2,555,870,- dated June V5, 1951.) This latching of the rod 102 in its uppermost position is eiected by hand operation when the wrap assembly is to be removed from the collar 158, there being between these'collars a cushioning 'spring 16) surrounding the rod 102.

Arranged to act beneath the collar 158 is a lever 162 pivoted at'164l to a post carried by the bracket 130 and arranged to be acted on at a pivot pin 166 by a rod 168 pivoted to a lever 170 which, in turn, is pivoted on the bracket 122. The

lever 170, when the parts are in normalv operating position overlies the upper end of a guided push rod 172 which is moved upwardly by the action of cams on the main cam drum of the machine. A latch 151 urged by a-spring 153 toward a stop 155 is providedrwith a hook 157 which is arranged to engage a pin 159 carried by the bracket 123 to latch the wrap assembly in its lower active position. A pulley 161 carried by the tube 118 supports a cable 163, one end or which is secured vto a counterweight 16S while the other end is secured through a pin 167 to a sliding sleeve 16?'. The pin 167 projects inwardly through a longitudinal slot 171 in post 11S and underlies the lower end of tube 12). The counterweight 1s so chosenas to substantially balance theweight of the wrapping assembly so that upon release of the latch 151 this may be easily moved upwardly and swung laterally to a convenient position for accessrto the lower ends of the wrap yarn carriers. When it is desired to restore the wrap head assembly to active position it is moved back into alignment with the bearing 161 a'nd'is lowered thereinto, the cone 134 entering the tube 136 to provide accurate alignment and rigidity. The latch 151 then engages the pin 159 to hold the assembly in operative position.

The lower end of the stationay'cylinderlli carries through an extension 184 a wrap horn indicated generally at 186 which at its initial end is in the form of a horizontal strip 183 and which beyond the region of presentation of wrap yarns to the needles has a raised extension 190 which insures a high position of the wrap yarns on the'v needles as they are raised following wrapping. The trailing end of this horn terminates as a wire 192 which overlaps the sloping end 194 of the wrap horn with clearance ,in the region of the downwardly and outwardly sloping face 195 of this portion of the wrap horn. The lower edge 4of the wrap horn is relieved at 196`for'a purpose hereafter pointed out.

Referring now to Figures 5, 6 and 7 there may be described those cams which, by acting'upon'the butts 73 of the jacks 72, serve to project Vthe wrap 'yarn carriers across the needle circle. These cams comprise cams '200, 202 and 294 which operate at the first wrapposition'and cams 210, 212 and 214 which operat'eat tlier'secondwrap position. The cams 260, 262 and 204' are pivoted' on a common stud 266 andare urged outwardly 'by "india` vidual springs 293. The cams 216, 212 and 2714 arepivoted on a common stud 215 and are urged outwardly by individual springs 216. Each of the cams'200, 202`and 204 is provided with a baci; portion 218. Individual operators are provided foreach 'of these camswhich are" identical so that one only need be described. This coinprises an adjustable screw 220 carried by a lever 222 pivoted on a stud 224 and urged in Va counterclockwise direction as viewed in plan by a spring 226 against a stop pin 223. A Bowden wire 230 connected to an` individual push rod serves to move the lever 222 in a1 clockwise direction with the result that when no camon 'the-main cam drum acts on a push rod the screw'220 engaging a high part'oi the portion 218 of the correspondingcam will hold the cam in its innermost active position. When Vthe push rod is raised by a cam on the main cam drum'the screw 22@ moves toward the left in Figure 5 and Vso -releases the corresponding cam to render it inactive. The

1 earns are thus rendered individually controllable'through v their corresponding push rods and Bowden wires.

The cams at the second wrap position are also individually controlled by a somewhat ldifferent mechanism. A housing 232 is provided to mount a series of' slides 234 each of which isprovided with aprojection 236 lco- 85 operating with a projection 238cm thecorrespondingcam 'cams 6 'of 'this "secondgroup;V Thefslides are normally "urged downwardly vasjrviewed inV Figure y5 'by individual springs 240jandfare adaptedrto beY pulled against the actionfo'f these 'springs-by; individual'Bo'wden wires 242 connecting to corresponding plungers acted upon by fcams on the main cam drum. When any plunger is V'not acted upon byjitsfcam its slide willjbe retracted by its spring VY24|) and the correspondingcam will beheld in operative position. When drum' 'catns acton'a plunger its Vvslide will be pulled.- to a position to Vpermit withdrawal fof l'it's" cam by itsfspring J1216 to an 'inoperative position. Individual screws V'2441 fserv'eito adju'st'the'slid'es 234 in a direction toward or fromth'e axis of the needle cylinders lso 's topro'vide yadj'istrri'ent ofthe operat'iveposition's 'offtl're Re erefiice'mayffnowibe made' 't'oFigures 3 and `41` fr the assembly whichiinc'ludesthe-' cams 266, 262 and126`4 which, by action on the butts 84 of th'e wrap'ya'rnca'r- 'riers,'= serve fto'move them inwardly of the needle circle -and,fas willb'e'pointed out hereafter, also serve to'limit the outward movements' of the wrap yarncarrie'rs. T he 'main supporting bracket 103 which mounts thefbearing 101 for the rot-ating supporting head of the wrap yarn carriers serves -for the mounting of a memberf246 which supports the vtube 100 for accurate positioning -as to its angular circumferential position, as to its height, and also as to -its tilt relationship to the axis of the needle cylinders. To achieve this screws 248 pass through circumferentially extending slots 250 inthe bracket 103 and are threaded into the `member 246. Other screws `252 Varethreaded into 4tapped openings in the bracketf103 and their lower ends bear upon 'the upper surfaceof the member2'46. As will'be evident, 'this arrangement of the Vscrews 'permits'i substantially universal adjustment,

' Vwithirrlimits, o f the fpos'itiono'f the 'member 246 and 'and -214previously described, and Ytheir operating elements/and also'forfthe cams 26d, 262 and 264. Additionally supported by this plate -are a pair of yield cams 266 and'272. The first ofV these Yis pivoted at 263 and urged infa clockwi'sedirection as viewed in Figures 3 and --25 by a-spring 270, while the second is pivoted at -274 Vand is urged, clockwise by a spring 276.

At this'point there may be described with reference to -Figuresf22 to '28,v inclusive, as well as to Figures 3 to 7, inclusive, the details of operation of the wrap yarn .carriers involved in the produ'ctionof wrapping. Atypicalv arrangement ofthe butts '73of the jacks 72 und of the butts' 84 of 'the'wrap -ya'rn'carr-iers, and the various cams which operate on'these butts,'will be described. Asfwill be evident, the arrangements about to bedescribed are subject to rather arbitrary choice but'tofprovide'consisfent detailed `description a particular arrangement is illustrated and described.

From Figurezl it will be noted that there are provided veight levels of -butts 73 'on the jacks 72. On the-present "Ymachineonly 'the six lower levels are used, the"'t'wo tippe'rmostlevel'sbeing provided for more elaborate or special 'patterning in which case there would be added two morecams tothe set of six illustrated in Figure 7.

Referring now to Figure 24, there are diagrammed Vtherein sixtypical wrap yarn vcarriers which are Vassociated impairs, the members of each pair being oftne Vtypes 64 and-64 previously referred to mounted in'la common slot 80 "and associated with a common disc-93 whereby the carriers of the pair are limited in their `relative movements. In the diagram of Figure 24 it Vis assumed that the wrap yarn 'carriers are moving-toward the left past the controlling cams, this movement correspondirgto a counterclockwise rotationof the needle cylinders andthe wrap assembly; The wrap'kyarn carrier VW1 Iis of vthe type-"64and is arranged't'o wrap wide panelsfat the lirst wrap position Vwhile the carrier W2 is of the'type 64 and is arranged to wrap wide panels at the 'second wrap position. The carrier l1 of the type 64" is arranged to wrap narrow panels -at the first wrap position Von needles Lof the instep series while the carrier l2 lisa"r

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