US2096217A - Reverse plating mechanism for knitting machines - Google Patents

Description

Oct. 19, 1937. A. E. VAUGHAN, JR 2,096,217

REVERSE PLATING MECHANISM FOR KNITTING MACHINES Original Filed March 1, 1928 8 Sheets-Sheet 1 FIG.

JZTUIP/VEYS Oct. 19, 1937. A. E. VAUGHAN, JR 2,096,217

REVERSE PLATING MECHANISM FOR KNITTING MACHINES Original Filed March 1, 1928 8 ShetS-ShetZ F/G.Ia.

, I I/VVE/VTOIF rm/Mays Oct. 19, 1937. A. E. VAUGHAN, JR

REVERSE PLATING MEQHANISM FOR KNITTING MACHINES Original Filed March 1, 1928 8 Sheets-Sheet 3 y V Y E aw i MWE/WOR finardw f. Valli/2112,5- r

W/T/VESS:

Oct. 19, 1937. A. E. VAUGHAN, JR

REVERSE PLATING MECHANISM FOR KNITTING MACHINES Original Filed March 1, 1.928 8 Sheets-Sheet 4 v, H 5 FL 6 5 WW; l l --ID.I..I 0 D|R 7 C w 7 6 w a Q a X I 4; JJ 6 w wt--- w, 4- a o 7 4 m s w w 7 2 lllllllll m m m a Oct. 19, 1937. A. E. VAUGHAN, JR 17 REVERSE PLATING MECHANISM FOR KNITTING MACHINES Original Filed March 1, 1928 8 Sheets-Sheet 5 Oct. 19, 1937.

A. E. VAUGHAN, JR

REVERSE PLATING MECHANISM FOR KNITTING MACHINES Original Filed March 1, 1928 8 Sheets-Sheet 6 m k R S g MN R m m M7 WW W/m/Ess:

A. E. VAUGHAN, :R 2,096,217

REVERSE PLATING MECHANISM FOR KNITTING MACHINES 8 Sheets-Sheet '7 Oct. 19, 1937.

Original Filed March 1, 1928 F/6.ZZ1ZT Oct. 19, 1937. A. E. VAUGHAN, JR 7 REVERSE PLATING MECHANISM FOR KNITTING MACHINES Original Filed March 1, 1928 8 Sheets-Sheet 8 B 4 v Y I HHHHHEH HE mama my; uuun- W /g7\ HHHHHHHHHHHHHHHHHHHEHHHHHIH Patented Oct. 19, 1937 UNITED STATES REVERSE PLATING MECHANISM FOR KNITTING MACHINES Andrew E. Vaughan, Jr.,

Pottstown, Pa., assignor,

Original application March 1, 1928, Serial'NoL 3 Claims.

This application is a division of a joint application filed by the applicant herein jointly with Charles H. Diener March 1, 1928, Serial No. 258,180, which said application embraced subjectmatter to which they jointly contributed as well as subject-matter'ofapplicants own invention, and which, besides containing claims for such joint invention, contained also claims for applicant's sole invention.

This invention relates to'mechanism useful in connection with knitting machines in producing ornamental pattern effects in the fabric through occasional reversal of two contrastingly colored or physically differentiated yarns which are normally fed' simultaneously to the needles of the machine in definite plating relation, so that the yarn normally relegated to the rear of the fabric is at times brought to the front for the purpose indicated. I

The invention is directed toward enabling the reversals of the plating yarns tobe effected with absolute precision at each needle to the avoid.-

ance of overlap, as between neighboring wales, in

the fabric produced by the machine; as well as to enable such reversals to be selectively controlled at each needle in predetermining figurative pattern effects of any desiredkind of scope.

The foregoingdesiderata I secure with the aid of associated instrumentalities to individually displace knitting needles laterally with respect to others in the series'just previous to drawing of the fabric loops with attendant reversal in-their hooks, of the two yarns normally fed simultaneously in definite plating relation as aforesaid; and through provision of automatically operative means to select between the displacing'instrumentalities in accordance with predetermined pattern designs. I 7

As will appear from the detailed description which follows, the reverse plating mechanism of my invention lends itself readily to embodiment into the form of an attachment capable of appli- Divided and this application 28, 1930, Serial No.,464,563

June

Fig. III is a fragmentary plan view of the knitting machine and the reverse plating mechanism PATENT orrlcs on a larger scale than in the precedingillustra:

tions.

Fig. IV is a view similar to Fig. III showing the plating mechanism in inactive Fig. X shows in perspective a set'of"jacks by which the pattern of the .reverse; plated fabric produced by the machine is in parttdetermined.

FigaXl is a detail view taken as indicated by the arrows XIX[ in Fig. 1H. a

Fig. XII is a perspective view showing one of the thrust cams embodied in the reverse plating mechanism. j 1 i I Fig. XIII is a detail sectional View in accordance with the arrows XIII'-'XIII in Fig. I.

,FigaXIV is a detail section 'takenas indicated by the arrows XIV XIV in. Fig. III. I

Fig. XV is a detail sectionvi'wed in. the mac;

'tion .of the arrows XV--XV in Fig. XIV. 1

Fig. XVI is a plan view of a'knitting needle, a sinker and associated push and pull instrumentalities whereby the needle is'manipulatedin'de' termining reverse plating thereon. 7 Fig. XVII is a' perspective view of. the assemblage shown in Fig.'XVI. i

Figs. XVIII and XIX are perspective views re- 7 spectively of the push and pull instrumentalities aforesaid.

Fig. XX is a diagrammatic illustration-showing,

in linear development, the relation 'of certain parts of the reverse plating 'mechanism to the knitting cams, the latch guard feeds. 7 I

Fig. XXI depicts a typical fabric design such as may be produced with the" reverse plating mechanism of my invention; and

Fig. XXII shows the manner in which the pattern jacks of Fig. X are arranged in the reverse plating mechanism to produce the patterned fabric ofFigXXI.

ring and the yarn As herein illustrated, the reverse plating mach anism of my-invention embodies an annular'head. 25 which surrounds the sinker dial 26 andrits T cap ring'Zl at the top of the needle cylinder of the machine. The sinker dial 26 is madifastjto:

i... a I

' the needle cylinder in the usual way so as to and'II) in upstanding lugs 3U with' the arm '3l of rotate and oscillate therewith in fashioning the heel and toe pockets-ofstockings. The cap ring 21-011 the other hand is held, stationary, except for capacity to circuinferentially' shift slightly as required during oscillatory knitting, through en;

gagement of adjustable screw vstops.29..(Figs. I

'the latch guard ring 32, said arm being pivoted at 33, for upward swinging, to'a post 34 rising from the bed plate 35 of the machine.- "From Figs. VII and XIV, it will be observed that the'head 25 comprises two component parts or sections 36, 31 whereof the lower one 36 is circumferentially under said lower section, see 'Fig. XIV. The cap ring 21 for the sinker dial is in turn held from displacement vertically by clips 40 detachably ise'cured toithe upper head section 3 3 .seeilFigs.

III and After customary practice, the

isinker dial 26 is radially grooved in its upperface to guide thesinkersS for reciprocation horizonftally.wlthrespect to the needles N in the cylinder 28, the upturned butts of said sinkers running in the actuating cam groove 4| inthe cap ring 21 in a'manner. .well' understood; ...Lying .at one'E'si'de ofsthesin'ker S in each groove of thesinker dial are; ush and 'pull Jin'strumentalities 42): 43 (see Figs. V,]VI, XIV and XVII) which operate upon thecorrespondingineedle N as later on explained. shown'in'Figs. V, VI; XIV'a'nd XVIII, the-push instrumentality 421is' uniform throughoutland disposed in a direct linewith the needle N. Its hOriZQntaIshank 42a is of greater 'idepth' than thatfof the sinker; and the sinker groove ofthe dial 26 is counter-recessed as at 44 in' Fig. XV toaccommodate it. At theiouter end,

the pushiinstrumentality 42has a depehdin'glliutt 42b; while its inner end is curved downward as -at 5420 to engage theshankfof the'needle N at a level "f somewhat belowythe top "of theneedle cylinder reach of the latch of the needle when the latter :descendsyt'o draw fabric loops. The. horizontal -shank.; 43d of .the pullinstrumentality '43 '(Fig.

. .:XVII) ":is'of the same vertical depth as that of the sinker S; and atthe outer? endhas anups'tanding buttr43bi Its innerrend is curved downwardly as at 430 (like the instrumentality'fl and terminates in a hook 4311 which engages the needle N withinva'circumferentia1:recess 45 of thecylinder. 'I o obviate necessity forexcessively large cuts to QaCCOIIImOdEitB the assemblage ineach groove of the jsinker dial 26, the 'pull-instrumentality43 is 'Lreduced'in thickness through a portion ofyits length as at 43c (Fig. XIX) to provide room for the sinker S, the arrangement being clearly shown :irrFigs. XVI :andaXVII. Y

As shown in Figs. V;VI,' VII and XIV the up standing butts 43b of the pull instrumentalities -4.3fpro'ject into a raceway 46provided for them in the: upper part3! of; the head 25, saidraceway bein'g'concentric with the axis of the needle cylinder 28. A portion of the inner Wall of this raceway =46fis cut. away as at 41 in Figs. V and VI [and supplanted by complemental segmental cams 4'8 49 whichare respectively pivoted at their greinote en'ds torswing about fulcrum screws 50, 5|. while their contiguous ends interengageaas, at.

in thickness such projections.

52 over the stitch cam 53 (Fig. XX) which is active during rotary knitting; or, in other words,

in a lineA-A slightly in advance of-aline BB through the, stitch point inv theillustration last referred to. With the segmentalcam 49 are associated a. pair of overlying supplemental segments 54,55 capable of swinging independently of it and of each other on the screw 5L As shown in Figs. V, VI and XI, these supplemental cam se'gments 54. 55 are beveled at their'free ends as at 54a, 55a, and overlap, to different extents,

the juncture between the main cams 48, 49.

Projecting vertically from the upper supple- I mental camsegment 54 through a slot 56 in the top of the'head 25 is a stud 51 which is engaged by a leaf spring 58 ,Similarly, the supplemental cam segment 55carries a stud 59 which projects 'up' through a clearance aperture 66 in the superposed segment 54 as well as through a slot 6! in the top of the head 25 for engagement by a leaf spring 62. The springs 58,62 act 'tojnormally .maintain the supplemental cam segments54, 55 in contact with a stop 111g, 63 on thesegmental cam'49.

With the several partsjust described in the positions of Figs. III, V and VI, it will be apparent that as the needle cylinder 28 is rotated in the direction ofthe iarrows, the pull instru- -mentalities 43 will"be..drawn outwardly by the segmental cams 48-49 as they'iapproach the yarn feeding station andstitch point of the needle actuating cams. I 7

Referring still to Figs. III-.VIIgit will be observed that the depending butts42b of the push instrumentalities42 are'subject to engagement by pattern jacks 65 whereof there is a' double seriesone abovethe others-disposed in aligned.

radial upper and lower, grooves 66in the'bote tom .part '36 of the head 25.1 These pattern jacks 65 have rearward projections 65a. at different levels as shownin Fig.iX,.so thatfby judicious selection and arrangement as'" exemplified inFig. XXII, any desired pattern maybe; predetermined in the fabric knit by the machine as will be more fully explained hereinafter. 'To cooperate with the pattern jacks 65,1 provide 'a system .ofthrust cams 61 (Fig. XII) in the 3 form of elongated plates arranged, at levels cor;

responding-to the. differentqprojections 65a on said. jacks and having centrally of their inner ends rounded cam protuberancesG'la to engage As shown, the thrust cam plates '61 are, divided intotwo groupsat different elevationsvertically (Figs. VII, XI) to correspond to the two sets of pattern jacks 65, and

are slidingly supported in anangularly disposed bracket 68 which is bolted to the side of'the head. 25 and centered on a radial line A A in- "tersecting the line. AA in Fig. XX, The'cam plates 6"l are subject to leaf springs 69 engag- 'ing,staggeringly-arranged studs 10 upstanding and depending, from the components of the two. ;cam plate groups, and having their ends an chored in opposite sides of the bracket '68. In

. order to permit of independent actuation, the

cam plates 61 are variously cut out centrally as at H to clear the studs of their contiguous fellows in a manner which will be obvious from inspection of Figs. III and Associated with.

each of the sliding cam plates 61 at the inner end are a pair of toggle pieces 12 (Figs. V, VI) which, as said cam plates are moved inwardly,

act as gap closers, or, in other words, assist in providing a continuous surface to contact with thebutts 65a of the jacks 65 at opposite sides of the curved protuberances 61a. At the outer end, the bracket 68 affords bearing for horizontal longitudinally-shiftable plunger rods I whichare suitably allocated in inclined parallel rows as shown in Fig. IX to cooperate at their in ner ends with projections 61b on the contiguous ends of the cam plates 61. Beyond the region of the two groups'of plunger rods 15, the bracket '68 has afiixed to it by screws 16 (Figs. III, VII) a housing 'II accommodating corresponding sets of vertically-slidable auxiliary jacks 18, 19 which have edge notches 80 to cooperate with terminal cam shoes 8| at the outer ends of said plunger rods. Individual springs 82 bearing on horizontal butts a projecting rearward from the upper set of auxiliary jacks'18, oppose operating levers 83 which engage said butts from beneath. As shown in Fig. I the openating levers 83 are fulcrumed at their outer endsto a fixed bar 84 suitably secured to the machine frame. A similar group of operating levers 85 is provided to effect actuation of the lower set.

of auxiliary jacks 19 through .the medium of rockers 86 with pivotal support at V0'! on the bracket housing I! (Fig. VIII) and engaged by springs 88; The operating levers 95 are likewise afforded fulcrum support at their outer ends by another bar 89 also suitably made fast to the knitting machine frame.

To govern the operating levers 83, 85 just described I provide a control mechanism which is comprehensively designated at 90 in Figs. I, II and XIII, and shown as comprising a system of lifting levers 9i fulcrumed at their outer ends upon a common axis 92 'WhiCh is jointly supported between a supplemental bracket 93 and an extension bracket 94 bolted to the machine frame. The levers 9| underlie the operating levers 83, 85, and at their outer ends are coupled with saidoperating levers through universal motion connections 95. It will be observed that the levers 83, 85 are graduated as to length, this being also true of the lifting levers 9I so that movement to the'same extent is imparted through the thrust cam plates 61 and the pattern jacks 65, to the push instrumentalities 42 by the parts which are about to be described. Intermediate their ends the levers 9I are equipped with rollers 96 adapted to over-travel a corresponding series of pattern chains 91 trained upon a sprocket drum 98 affixed to'a'shaft 99 which is journalled in suitable bearings of the brackets 93, 94. Amongst the linkspfthe sprocket chains are special cam links 91a capable of interchange and arrangement in accordance with the pattern desired in the fabric produced by the machine. When the reverse plating mechanisni is in operation, the sprocket wheel shaft 99 is intermittently rotated as a consequence of the picking of a ratchet wheel I00 (Figs. I and 11a.) thereon by a pawl iilI receiving vibratory motion by virtue of .eccentricpivoting on a disk' I02 at the end of ashaft I03 with bearing in the bracket 94. The shaft I93 is rotated through a pinion I84 in mesh with one of the gears I85 embodied in the driving mechanism of the machine (see Fig. II). V

For greater diversification of pattern effects, I

. employ a master sprocket chain I06 to control pawling of the shaft 99 which carries the sprocket drum 98. This master chain I06 is trained about a sprocket wheel I81, which, together with-an attached ratchet Wheel I88 (Fig. II) is free upon the shaft 99. The ratchet wheel I08 is picked by a pawl I09 disposed alongside and pivoted on the same eccentric stud with the pawl IOI so as or overthrow of the ratchet wheel I08. The mas-1 ter chain I06 has special cam links .I 06a to undertravel a roller III on' an arm II2 thatis ful-' orumed on the end of the axis'92 serving'the I lifting levers9l. A link II3 connects the arm I I2 with one end of a centrally pivoted rock lever II 4' whereof the opposite end rests on the top edge of a horizontal lever I I5. with fulcrum bearing at 6' within the machine frame, see Fig. II. A vertically-reciprocable slide III (Figs. I and Hat) with bearing'in a guideway H8 at the side of the bracket 94 is coupled with the lever I I5 by means of a. link I I9 and has a lateral projection I to under-reach the pawl IOI. A coiled tension spring I 2I tends to yieldingly urge the slide III upward with the rock lever II4 bearing on the lever 5. With this arrangement it will be apparent that lifting of the arm II2 through engagement of the roller III thereon by one of the cam links of the master sprocket chain I06 is attended by depression of the slide I I1 and release of the pawl IOI to activity in stepping about the ratchet wheel I00 on the shaft 99 carrying the several pattern sprocket chains 91. v

' The function of controlling the mechanism 90 is relegated to the timing mechanism of the machine, the intermittently rotatingshaft I of the latter being tothis end equipped with a supplementalcam drum 126, which, as shown in Figs. I and II, carries on its circumferential face,

, spaced rises I2'II28'and l29-il30occupying different planes. The outermost .set of cam rises I21'I28 are effective upon a lever I3I which is rockable about a fixed stud. I32 at the side of the machine frame in opposition to the pull of a tension spring I33. The movement of the lever I3I is communicated by ineans'of a link I35 to a finger I36 pivoted at I31 to the bracket 94 and formed with a lateral projection I36a to underreach-both the pawls I9I, I09. Thus, when the lever I3I is engaged by the camrises l2I-I28 of the supplemental drum I26, the pawls IOI I9 9 are concurrently lifted away from the ratchet wheels I00-I08 to suspend operation of the pattern mechanism 90. As a means to control'the pawl I8I independently'of the supplemental drum I26, I may provide-the measuring chain I38 embodied in the timing mechanism of the machine with special high links such as shown at I39 to actuate the lever II5 for impartation of the nec essary movement to the pawl-lifting slide I I1.

During certain phases of the knitting, e.g., in-

cidentally to fashioning of heel and toe pockets of a stocking when reverse plating is not desired or required, provisions are made as follows for moving to any inactive position, the segmental cams 48, 49'which affect the'pull instrumentali ties 43. Pivoted at I40 (Figs. 1, II and IV) to the top of the head 25 is an arm I with'an eccentric groove l42 in the lower face of its 'boss toengage the upstanding lug 63 of the segmental cam 49. .Connected to the end of the arm I4 I'isan arcuate rod I43 capable of sliding movement in an aperture through a swivel stud I45 on the bracket 68 An arm.l46 secured to a. vertical axis I 41 down through a boss I48 of the bracket 68 is coupled,

by means of a link I50 with the arcuate rod I43. A second arm I5I on the Vertical axis I4! swing;-

able beneath the bracket 68 is in turn coupled by a link rod I52 with a swivelstud I53 on one arm of a bell crank lever I55 (Figs. I and II) havingfulcrum support at the side of the machine frame.- Still another link'rod I56 joins the other rock lever l3! previously'referred to.

which is fulcrumed on. the stud] 32'inward of the end of the rock lever I 51 (Fig. 11'.) lies within the path of the cam rises |29, |30 on the supplemental Assuming the reverse plating mechanism to be in action, theneedle cylinder 28 rotating in the direction of the arrows in Figs. V and VI, "and that two contrasting yarns Y, Y are'being concurrentlyfed atthe proper relative tensions, from two feeds F, F to the needles N in plating relation as shown in Fig. XX, the operation of my invention is as follows: As previously stated,

upon approach of the needles toward the yarn feeding andstitch forming regions, they are all flexed outwardly as shown in Figs. V and VI by action of the segmental cams 48, 49 upon the pull instrumentalities 43. Now if one of the levers 83, say that marked 83 in Fig. VII, is actuated by the pattern mechanism 90,. the corresponding auxiliary jack 18a: is lifted (see Fig. VIII also), the aligned plunger rod 150: axially shifted inward, and movement imparted, as a consequence, to the associated thrust cam plate 61:: toa like degree in opposition to its spring 69, to the end that all the pattern jackets 65 withlbutts 65a in the plane of the cam platefilx are engaged, one such jack being indicated at .6510 in Fig. VII. Sincethe cam plate 611: lies in the line A-A slightly in advance of the stitch point (Fig. XX)

the pattern jack 65a: is alone projected inward through engagement .bythe rounded protuberance B'laof said cam -plate. It,-th'erei?ore, follows that the push instrumentality 42x subjectto actuation by the jack 65a: is in turn pushed'inward, thereby displacing the corresponding needle Na: (previously moved out'by the pull instrumentalities 43 with the others) inwards without effecting the immediately adjacent needles. The action just described takes place when the butt of the push instrumentality 42.1: has just passed beyond the end of the segmental cam 49, and is made possible through capacity of the supplemental cam seg'm'ents54, 55,(associated with the segmental cam 49) to yield successivelyunder tension of the springs 58;;62. In other Words, the butt of the selected push instrumentality 42ximmediately as it passes beyond the province of the segmental cam 49is thrust inward, overcoming the spring 62 as in Fig. Vand pressing the cam segment 55(the upper cam segment 54 being notched as at 54b for clearance of the butt of the push instrumentality 423: at this time, while the next succeeding push instrumentality is still riding on the segmentalcam 49). Attentionis also directed to the fact that currently with the above events the butt of the push 'instrumentality 42 immediately preceding the one marked 42xis being held out by the uppermost'cam segment 54-. c As the movement of the needle cylinder 28 continues, the

butt of the selected push instrumentality' 43a:

rides off the cam segment55 whereupon'th'e' latter immediately slips back-to its original place against the upstanding lug 63 of the segmental cam 49 'to intercept the immediately following push instrumentality 43' as shown in Fig. VI. At

the same time, the selected push instrumentality 42a overcomes the tension of the spring 58 influencing the cam segment v54, this occurring just asth e needle Nx is about to draw the fabric loop at the stitch point and resulting reversal of the yarnsY, Y from the. normal relation in the needlehook. With accomplishment of the yarn reversal in thehookof'the needle Nx, the selected 7 V 2,096,217; arm of thebell crankil55-with a rock-lever I51, 7

The free the selected one.

push instrumentality- 42:0 passes beyond the cam segment 54-whereupon the latter is'at once returned'byits spring58 to its normal position against the upstanding stop lug'63 of the segmental cam 49 to check possible, inward movement of the. push'instrumentality .42 succeeding Thus, in accordance with my invention, each needle upon which reverse plating is to be effected is thrust out of the plane generally followed by the other needles at that'time,

With consequent reversaliof the'yarns-in its hook just before the fabric loop is drawn. The precise operation of the parts asdescribed precludes the possibility of overlap of the reverse plated areas or regions into the field of normal plating in the body of the fabric with assurance of sharply defined figures inthe pattern. The pattern knitted is predeterminablethrough arrangement of the jacks 65 in the head 2ll,as well as by arrangement and diversification of the links as between the several sprocket chains 91 of the mechanism 90 which'controls selection of the needles; The master sprocketchain I 06 also plays an important part in the determination of the pattern through controlling the picking of the shaft 99 carrying the sprocket drum 98'for the pattern chains 91, thereby causing repeat-reversals on the same needlesas required for'example to pro- V duce the larger squares in the design shown in Fig. XXI. Incidentally to the knitting cycle of the machine, the measuring mechanism governs, through the interposed elements. already described, activity of the pattern mechanism 90 andthe segmental cams 48. 49 for the pull instrumentalities 43 so that. portionsof the fabric,

such as the heels and toes of a stocking; may be knit plain as desired. 7 I

I Although I have shown and described the invention as particularly useful in connection with hosiery knitters, it is of course to be understood that its scope is not so limited since its adaptation to other types of knitting machines is clearly within the province of a skilled mechanic.

I do not herein claim as my invention the specific push and pull instrumentalities herein described, nor the specific mode of operation of the slidable jacks, nor their association with sub-- jacks, norcombinations of which said constructions are a part, nor other featuresof construction not herein specifically claimed, as thesame constitutes the joint invention of said Diener and myself and is'claimed inthe said joint application of said Diener and 'myself hereinbefore mentioned; my invention coveringonly the subject matter of the appended claims. 1

Having now fully described my invention, what I claim and desire to protect by Letters Patent is: 1. Reverse plating mechanism for knitting ma chines comprising instrumentalities for laterally displacing individual needles relative to others with attendant reversal "in their hooks, just previous to loop drawing, of two yarns normally 'fed simultaneously in definite plating relation, interchangeablepattern jacks with actuating butts in different planes coordinated with'the displacing instrumentalities a set 'of thrust cams lying in theplanes of the pattern jacks, and pattern mech- I anism including a series of sprocket chains with interchangeable cam links influential in selective control of the thrust cams, and a masterspr'ocket chain with interchangeable cam linksgto govern pawling of the sprocket chain seriesaforesaid. f

2. In a knitting machine, a series of independent latch needles and operating means therefor, means to feedtwo threads in 'a-normalplating're 1 a reverse plating relation.

3. In a knitting machine, a series of independent latch needles and operating means therefor, means to feed two threads in arnormal plating relation to said needles, and means adapted to move selected needles slightly transversely of the needle series in proper timed relation to the yarn drawing movement and to the casting off point so as to cause the two threads to be reversed in position in the hooks of said selected needles with the result that both of said threads are cast ofi said selected needles in a reverse plated relation. 10

ANDREW E. VAUGHAN, JR.

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