US1388341A - Knitting-machine - Google Patents

Description

D. HLMES AND W. H. THICK.

KNITTING MACHINE.

APPLICATION FILED M1622, 1919.

l ,388, 34 l e Q Fel-rented Aug 23, 1921.

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a? I afl/Lun mtr/WMM) FID. HOLMES AND w. II. IIIICK.

K'NITTING MACHINE. APPLICATION FILED AuG.2, 1919;

1,388,341. Patented Aug. 23, 1921.

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. F. I). 'HOLA/Iss AND w. II. IRICK.

KNITvTING MACHINE. APPLICATION FILED Aus 2. 919

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Patented Aug. 213, 1921.

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chine, 'of which the following is a specificasinkers for forming '25 y msm for positioning States,

.tion of the cam plate seen marre!)v STATES- PATENT oen-ca;

rmx n. Homme .um Waxman n. mateix, or DETROIT; mexican.

Application filed August 2,

To allwhromztmayicmwcm.' i

Be it known that we, FRANK D. HOLMES and WAL'rER H.TR1CK, citizens of theUnited and residing at Uetroit,' countyfof and "State, of Michigan, have in- Wayne, v

vnew and Improved Knitting-Mavented a tlOn. l

This invention relates to the construction of knitting machines adapted to torm'fab-Q rics from two separate yarns which are' knitted into the lfabric simultaneously and from one of which loops are formed on the interior surface of the fabricxto'inc'rease the y thickness and warmth thereof.'I The 'principalobject of this invention is to pro-'vide a knitting machine which will lproduce a two-yarn fabric'provided .with comparatively short loops'formed one ofthe yards which .willv practically lie directly 1 the corresponding portion of the other yarn andcover it on both Sides of ,the fabric. AThis invention consists in aseries 'of novel the loops on the' interior the novel cam mecha-1 the sinkers. It also* consists in the details of construction illus# trated ind ,the accompanying zdrawings an particularly pointed out in the claim..

In the accompanying drawings, Figure l. is a plan of this improved knitting machine. Fig. 2 is a, section on the line 2*.-2 of Fig. l. Fig. 2a is a similar section ot a' portion o the structure shown. in Fig. 2 on a plane passing through a needle. F ig. 3 is a porfrom below. Fig. 4 is a section on the lin'e 1-4 of Fig. 2. Fig. 5 is a perspective on a large sca-le of a knit-- tingv needle. Fig. 6 is a diagram showing the method of.producing the loops. Figs. 7.' to 12. inclusive are views showing the action of the fabric and in lof thesinkers mi needles.

' 3 at the lower The needle cylinder '.1 ozt this machine connects Ito thev skeleton"cylinder or needle guidel and 'isrotated by the bevel-gear ring end of this skeleton cylinder through the medium of the pinion 4. This needle ide consists of a'lower ring 3 and y extending ngei's 6 which are their upper ends by means of particularly connected at between the guide fingers Specicatpion et Letters Patent. V.

. race 10 into which the' stationary 'latch ring 18 f Mountedfon the needle' cylinder is 1911s. 'i semina. 314,944..

Patentea Aug, 23,1921.

' Astationary cam 9;has a 2groove or needle butts 8v of the needles extend and as the needle cylinder revolves, the needles are lowered' andthen elevated. The upper end of each .needle is in the. forni cfa hook 'l2 and each hasda groove 13 in l 4which the latch 14 is ",pivoted. The needle cylinder has rings 15,

interrupted by the vertical grooves that receive the needles:I and 1 between these rings are the coil springs 16 that hold the needles in their grooves.

' Supported above the needle cylinder is va us-vv having a guidehole 19 and guide tube 20 for the yarns 22.and l 23, one of which primarily gives stren th to the fabric and the other lwarmth. latch ring prevents the latches 14. from flyingout. 'In many cases the yarn 23 is of cot-- ton' and the yarn 22 of wool. Fitted into the hev upper end' ofthe needle cylinder is a throat` ring 24 .which is madefseparate fromthe-- f `needle cylinder for manufacturing reasons; 'Ihe'parts thus far described are old and4 well known.

The needle cylinder-and throat ring are 'I formed with 'radial grooves .and holes to receivefthe sinkerS- 26 which have the butts '27 The outside of the fabric is plaitedknitted and the two are so positioned that the yarn 22 1s a over` the yarn 23. sinker-cam ring is shown in Fig. 3.

During practically three-fourths of the period during which makes one complete rotation, the needles are wavs ' elevated and the sinkers are in their normal seventh one-eighth of position. During the yarns) "05 The bottom Side of the d to engage the cam ring described later on,

- the tufting points 28, the

the needle cylinder the turn, thes inkers arev pulled backlso that avoid the varn guide the tuftinfr oints may n p the last 0, as shown in F1g.-2. Durin eighth ot the turn 1.015 the needles are pu led down to form loops and then pushed up and the sinkers are pushed in to :suppoxtthe yarn 23 and then 'to finished fabric'while the needle moves upward in the just finished. loop.

Referring to. Fig. 3,'v the sinker-earn ring 33 has a circularr groove 37 buttsv 27 of the sinkers and extending about three-'fourths ofthe circumference of the ring up to the point 38. vFrom this point to the point 39 the continuation of'this groove might be `straight-except that the present machine-may be used for knitting heels on socks in whichy case the needle cylinder -re- .ciprocates through about forty-five degrees and the cam groove between the pointsl 38 and 39 is utilized. When the butts reach the circular portion 40, the sinkers are so far back that the'tufting points 28 will pass outside of vthe yarn tube 20, as shown in s the needle cylinder rotates, the yarn 23 will b e laid on top of the supporting lingers29 of the sinkers. The inclined part 42 of the cam groove moves the sinkers in wardly to bring the tufting points 28 below of the needli` reaches the yarn 22 is laid on the tufting point -in front .reach the lower yarn 23, as

'tions being indicated bythe lines (l and soon passes to the the yarn 22 as it "leaves the hole 19 so that the yarn 22 willA be laidon these points. When the butt. of a of the part 40 of the groove, the needle next behind it begins to move down and the hook yarn 22' just as the of it. This is the location of the sinker a in Fig. l?, and this sinker will belatabout the inner end of the portion 42 of the cam and indicated by linea in Fig. As the needle cylinder turns, the needle keeps on -going down and justas the butt of -the sinker reaches the line b in Fig. 3,' the needle will indicated in Fig. 6andthen begin to draw the two yarns through the stitch A already on the needle, the positions of the needle, the sinker, tho stitch and the yarns for the positions aand e being shown in Figs. 8- and 9 respectively. The latter shows the yarn 22 lying on top of the tufting finger and the beginning of the formation of the loop.

The sinker then moves inwardly, its posito la, inclusive in Fig. 3, and the positions of the needle being indicated in- Figf 6. At the time the needle has been lifted so far that the top ot' the hook is almost in 'contact with they previous .stitch A, as shown in F ig. 10, the` sinker is at the line L in'Fig. 3 and is just pushing the fabric inwand so as -to move the stitch A out of the path'of the back of the medie, the loop remaining overthe, tuft ing finger. It the press upward against the stitch A, it is ilableto tear or break it. The needle cylinder. continues to turn and the needle to rise press inwardly against theto receive the and in practice we have determined sinker reaches the middle .Y ieee, but as the groove loses top of`the hook should be positions shown il;l loops may fall over the lower yarn.

Figs. 11 andl12, the let-ter being the position leid during the passage of the sinker butt through the long part 37 of the cainring. Until the sinker hasreaehed the position indicated by the'line h in Fig. 6, the loop of the yarn 22 is held Vby the tufting point 28, but because of the upward movement of the needle and the pull'of the knitted fabric,

the loop of the yarn 22 begins vto slip and as,

the sinker jumps back after it passes the line i, the loop--of the yarn` 22 is'cast off shortly after it passes the line z'. The inward .movement of the following sinkers tends to pull I the yarn 22 until it is hardly more than a loose stitch.

The invention therefore consists in so proportioning the .sinkers and the cam groove that the tufting points will; always be moved under the yarn 22 in time to support it before the .yarn is engaged by the ooks of the needles, and continue to sup-` port the loops which are thus formed so long as there is any pull on the yarns and thus prevent the loops from being pulled down. lThe length of the loops will be determined by the height of the tufting fingers, that we can make them from one-sixteenth to threeeighths of an inch long.4 lrVe prefer however to make them quite short, no longer in fact than is necessary to give sufficient length topermit them to liel loosely over the yarns 23 just below them. lt has been impossible to make these shortloops heretofore and the new fabric with the yarns 22 made into loops which lie fiat over the cotton' yarns 23 on the inside of the sock'has made possible a garment of unusual strength and warmth. At the same time the short loops make -for a moderately thin fabric instead of the excessively thick material Which results when the loops are'long. The cam ring 33 can of course be made all in one` its exact shape ecause of wear, we' prefer to form the parts and 45 them to the cam ring by means of bolts 47- that extend through the slots 48 and 49. The part 46 may also be made separate 'so that it can lbe replaced if Worn.

ln this machine as' in all others pl'aitedknitting machines of the same general construction using two yarns which enter one above the other, the upperyarn vgets toithe outside ofthe fabric during the knitting operations and covers the lower yarn. unlike the other machines of this eonstrt'iction, the lower yarn does not lie over the upper yarn "mi `the insideof the fabric, this ing prevented by the formingof the loops. The tufting, points holdup the .upperA yarn while the lower yarn is drawn tight and down! or shorten this loop of f A ot heavy Wool l separate and adjustably secure finally cast off this upper yarn so'that the' y the cams are so fall on the sup- 10? being possible under suc/h condiftons henplan plated Work ls' dsirei 'cams 4:5 may be Separate, thc screws 47 'beuf/ sawked 'up to per mit this movement.

In a. k'lttng machr'ae, 'a needle cylinder having" mday and. longitudinal guide grooves9 needles mounted '111 the longitudinal groove@ and means 'ffm :Having sad needes up .am down, snkems mo'unt in the radial gronves and having supporting; fingers; tuh

If plain work is desired, timed that both yarns mgm porting fingers F297 no ig points' and. butts, a Sinkel Gama-ing to move the stakers :mil out, means for guding a pair of yarns to h@ Snkms so that one yarn W 1i@ n the Umea? befm the] tuftng .releasetxne yarn points, means to turn the needle cylinder relatixfe to the snker @am-ring, and means to move the nedes down to engage both yarns and pull them throug *cha vpreviom; stitch, Said snkar empfing beng crmd to ho. the 'mitin-g pon-fe bet-5mn Saad y; mt justlwfora the. needle 'm upward, Umvement passes bacs of the mmousy 'frmrn suerz'; back la stitch and then zo mme: me l so tha@ Suppm'ted the!" the pressure of the sixcceedzig smiirys W. draw down. th@ mop Whah has; prevmlsly been suppmm by sdd hier until sub stantaly commis with und covers yam.

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