Патент USA US2106872код для вставки
Feb. 1, 1938. ' H. H. HOLMES 2,106,872 CIRCULAR KNITTING MACHINE Filed Feb; 28, .1923 ~_____ @ =1 2 Sheets-Sheet l Feb. 1, 1938. ' H. H. HOLMES 2,106,872 CIRCULAR KNITTING MACHINE Filed Feb. 28, 1923 2 Sheets-Sheet 2 Patented Feb. 1,1938 ‘ 2,105,372 UNITED STATES PATENT OFFICE 2,108,872 CIRCULAR KNITTING MACHINE Henry Harold Holmes, Leicester, England, as signor, by mesne assignments,‘ to H. Brinton Co., Philadelphia, Pa., a corporation of Penn sylvania' Application February 28, 1928, Serial N0. 257,620 In Great Britain April 1, 1927 8 Claims. (CI. 66-24) This invention consists in improvements in or wise direction of the member, from a transverse relating to circular knitting machines of the shouldered portion. type comprising a set of cylinder needles and a The dial has associated with it a cam mecha set of dial needles. An object of the present in- nism. which, when a loop is to be transferred 5 vention is to provide means whereby, after the from the dial needle to a cylinder needle, pro- 5 dial and cylinder needles have been employed in ' jects the transfer-point to enter and engage the conjunction to produce a ribbed fabric, the stitch- loop, then moves back the needle to enable the es can be transferred from the dial to the cyl- loop to be pressed o?f therefrom and to be re inder needles so that plain knitting can be con- talned by the transfer-point and subsequently l0 tinned on the same machine, after a cylinder needle has been raised into the 10 The invention accordingly comprises the com- loop which is held by the transfer-point, retracts bination with a dial needle of standard type of the latter. a loop-transfer point which is carried in the dial to slide alongside the needle in a path substan15 tially parallel with that in which the needle ‘ One form of dial mechanism comprises a disc like cover plate extending over the top of the dial and formed, as 1701175 under surface. with two 15 moves. Conveniently, the needle and transfer point are slidingly mounted in the ‘same trick, tracks, one for the needle butts and the other for the butts of the transfer-points. In each track The invention is limited to the use of dial needles there is a movable cam’ 01‘ Cams to enable the of standard type, that is to say, to needles that necessary timed movements to be imparted 130 20 are standard articles for use in knitting ma- the dial needles and transfer-Points chines and are thus common articles of commerce at the vpresent time. One such standard type of needle is the latch needle shown in the accompanying drawings. The invention is not 25 concerned with needles of special formation differing from those which are now regarded as the said standard needles of commerce. A feature of the invention consists in the employment of a latch needle in. conjunction with 30 a transfer-point in the manner above referred to. In one example of the invention the tricks in the dial are of such width that in addition to the usual dial latch needle a transfer-point can also slide with a needle in each trick. The dial needles 35 are formed with upwardly-projecting butts and one Preferred example of the invention Will new be described in detail with the aid of the ac compenying drawings. in Which Figure 1 is 8- deVelOped View Of the interior of the cam-b0! for the needle cylinder; ' 25 Figure 2 is all Under-side Plan View Of the dial Cam Plate with the ms in the non-knitting Position; Figure 3 is a View similar to Figure 2 showing the Cams in the knitting Position; 30 Figure 4 is a View similar to Figure 2 showing the cams in the transfer position; Figure 5 is 8- 1301) plan View‘ of the cam Plate showing the striking and locking levels; Figure 5a is a section On the line 511-511 0f 35 the transfer-points are in the form of ?at strips also having upwardly-extending butts, Each transfer-point may be formed with a bifurcated outer extremity whereof the bifurca- ‘ 20 Figure 5 showing only relative Positions of the dial and cylinder needles and an associated trans fer-Point; Figure 6 is an under'side plan'view of the dial 40 tions are so formed that they will both lie in a cam Plate with the cams remWed? 40 Figures 7a, 8a, and 9a show details, in plan, plane that is substantially radial with respect to ' the needle cylinder, and the lower one is slightly of certain of the cams; downturned and is intended to enter the loop or stitch on the associated dial needle. The ex 45 tremity of the transfer-point is conveniently so curved as to afford a channel into which an ap- propriate cylinder needle can pass ‘freely when it Figures 7b, 8b and 9b show views looking from the right respectively of Figures ‘7a, 8a and 9a, angigures 10 and 10b are perspective views of 4'5 two di?-erent forms of transfeppoima Like reference numerals indicate like parts in is m0ved—as will be explained more fully here50 lnafter-—into the stitch that has been transferred from a dial needle to the transfer-pointPreferably, the transfer-point is in the form of a strip-like member capable of sliding in a trick in the dial and having at its outer end a pointed the several ?gures of the drawings, In the example illustrated, the number of 50 needles in the cylinder is double that of the needles in the dial In order to enable. ribbed fabric to be knitted, alternate short and long cylinder needles are employed, as indicated re 55 extension, that projects outwardly in the length— spectively at I! and II in Figure 1. The long 55 2,106,872 needles are double-butt needles and when it is desired to produce ribbed knitting, a push-in cam I2 is moved as shown, into the path of the lower butts and takes the needles Ii down into the non-knitting position. In this position the upper butts of the long needles travel in the idle track l3 below the usual stitch and other control cams and remain inoperative. Another push-in cam i3 will be held outwardly while the needles 10 II are to remain inoperative, and when the cam is. when the cylinder needles ii are maintained inoperative, the swing cam 33 is moved outwardly to the outermost position shown in Figure 3. The other movable cams 31 and 3i remain, however, in the position already described with reference to Figure 2. The needle butts are now guided by the cam surface 233,Iand the needles are conse quently projected outwardly sumeiently to clear ' the stitch already made and to take the yarn. After the needle butts leave the cam surface 233, they are engaged by the stitch cam 30, and the stitch is completed by this cam. The direction of relative rotation between the dial cam plate and the needles is indicated by the arrow 23 in cam I3 is moved inwardly to the position shown 7 Figure 2. in Figure 1 thereby engaging the upper butts, and It will be appreciated that the transfer-points, I3 is thus held outwardly it does not engage the upper butts of the needles II. To return the latter to the knitting position, the cam i2 is re moved from the path of the lower butts and the with the aid. of the lifting cm I! the needles II are raised to the height of the knitting track i6. When the needles Ii are in their inoperative position, their places will be taken by dial nee dies in a manner well understood, so that a 1:1 rib can be produced. When a change is to be during the time that the dial needles are knit ting, are still maintained inoperative. Generally, the cylinder and dial needles will commence to be operative together to knit a length of ribbed fabric at the top, for instance, of a hose or half hose, for which purpose the dial cam mecha made from ribbed to plain knitting, the cylinder - nism will have the movable cams adjusted to the positions shown in Figure 3. After the required needles are allraised by the cam M in the man ner just described and the dial cam mechanism length of ribbed fabric has been knitted, it will will operate on the dial needles and transfer points, in succession behind the yarn feed, in the manner to be described hereinafter. For the complete understanding of the opera tion of the dial needles, transfer-points and dial cam mechanism, reference is now made to Fig ures 2 to 10. - In each needle trick in the dial there is a dial needle 23 (Figures 3, 4, 5 and 5a) and a trans fer-point 2i (Figure 101: or 10b).v As seen in Figure 5a the butts 22 of the needles are higher than the butts 23 of the transfer-points. The be necessary to transfer the stitches from the dial needles to'the cylinder needles, and for this pur pose, as shown in Figure 4, the swing cam 33 is moved inwardly; the slide cam 31 is moved to its outermost position, and the swing cam 3i is also moved to its outermost position. The cams 31 and 3i are moved simultaneously by means of a radial slide-bar 33. A stud 231 connects the cam ' 31 with the slide-bar 33, and another stud |3l connects the cam 3i with the slide-bar 33 in such a‘ manner that the‘ cam can be swung inwardly and outwardly by a correspondingradial move latter are in the form of strip-like members. The -ment of the slide-bar 33. ’ outer ends may be bifurcated, as shown in Fig with the cams in the position illustrated in 40 ure 10b, to afford projections 23 and 23, or, as Figure 4, it will be seen that the needles, after 40 shown in Figure 10a, the projection 23 may be leaving the stitch cam 33, travel round the track replaced by a shoulder 23. ‘The point of projec 33 until they engage the cam surface 331 of the tion 23 is intended to enter and hold a stitch cam 31. They are led by that surface to the cam already formed on its associated dial needle when surface I33 of the cam 33 and by this means the - it is desired to transfer that stitch to a cylinder dial needles'are projected outwardly sufiiciently needle; and in order to permit the ready passage to clear the stitches, already formed on them. behind the latches of the needles. Following this, of the cylinder needle through the stitch so held on the transfer-point, the extremity of the latter is bent as shown to afford a groove or channel 50 21 into which the needle can pass and thus enter centrally through the stitch. Referring now to Figures 2, 3 and 4, it will be the needles travel down the reverse surface of the cam 33 and between that reverse surface and a ?xed cam 33 so that the needles are drawn 50 rapidly inwards. Simultaneously, however, the seen that the dial mechanism includes ?xed cams transfer-points are projected outwardly by en gagement of their butts with the swing cam 3i, 33, 3|, 32, 33, 33, 33 and 33, which, together with‘ and as the needles are drawn inwardly, the ex 55 a slide cam 31 and a swing cam 33 aiford a needle track 33 in which the butts of the dial needles tremities 23 of the transfer-points enter the loops of the stitches in succession and retain those loops. The transfer-points are moved outwardly to the maximum extent by the cam 3| and at are received. There is also a central fixed cam 30 and a swing\cam 3i. Between the cams 30 and 3i and the surrounding cams 32 and 33 a 1 their outermost position, substantially that illus 00 track 32 is provided for the butts of the transfer points. . When the slide and swing cams 31 and 38 are in the position shown in Figure 2, the needle trated in Figure 4, the cylinder needles Ii, in 60 succession, are raised upwardly so as to enter the stitches held by the transfer-points, the chan nels 21 on the transfer-points facilitating the entry of the cylinder needles into the stitches. butts are guided by the cam surfaces I31 and I33 65 respectively so that at no position in their pas ' When the stitches have been transferred on to 65 sage around the traek 33 are they moved out the cylinder needles, the cam 33 retracts the wardly to take the yarn.‘ The transfer-points transfer-points into the inward position and as are guided in the track 32 so that they also are soon as the stitches have been transferred from not projected outwardly at all; the swing cam 3| being in the inward position illustrated in Figure 2. Thus, the dial needles and transfer points are inoperative, and they are maintained in this condition during the time that plain knit ting is being eifected on the cylinder ‘needles. 76 When the dial needles are required to knit, that all the dial needles to the corresponding cylinder needles, the cams 31 and 3i are moved inwardly 70 again to the position illustrated in Figure 2, after which the dial needles and transfer-points remain inoperative. Plain knitting can now be continued on the cylinder needles during which time, of course, 3 area-e72 the cam II will be held out from the path 01' the lower butts or the needles II. It will be understood that, although an ex ample of the invention has been described for the purpose of knitting a 1:1 ribbed-fabric, any desired form of rib can be produced by the proper arrangement of long and short needles in the needle cylinder and corresponding needles in the dial, such arrangements of ‘needles being well 10 understood. The mechanism by which the movable cams in the dial are moved outwardly and held in the positions of outward adjustment is shown in Fig ure 5. Associated with the swing cam 38 is a 15 striking plate 10 pivotally mounted on the stud ‘H. A stud 12 which is fast in the swing cam 38, extends through a slot 13 in the cover plate 60 and. also into a slot 14 in the striking plate 10. A spring 15 pressing on the stud ‘I2 normally 20 tends to hold the swing cam 38 in ‘its inward position. The swing cam 3! is moved outwardly, however, by engagement with the tail end of the striking plate ‘ID (that is, the end on the right of the stud ‘H as seen in Figure 5), and this may be effected by any preferred means such as a pro jection which is moved into the path of the striking plate ill at required times by a pattern chain or other controlling mechanism. In order to hold the striking plate and the 30 swing cam 38 in the outermost position, a locking lever or plate 75 plvotally mounted on a stud i1 is employed. The locking plate 18 is formed with a shoulder 18 which passes under and engages with the nose of the striking plate to when it 35 has been moved outwardly in the manner above described, and so holds the striking plate in the position indicated. A spring 19 normally tends ‘ to press the shoulder ‘it towards the striking plate at all times, and the latter snaps past the corner 40 of the shoulder ‘it into position. In order to release the striking plate so as to return it and the swing cam to the inward position, another projection can be moved into the path of the outer end of the locking plate ‘58 so as plvotally to 45 move it on the stud ‘W as will be readily under stood from the drawings. on the stud TI is a second locking plate Mi which presents a shoulder 8| to hold the nose of the striking plate ‘ill at an intermediate posh» 50 tion between the outermost and innermost posi tions. A spring 82 performs a similar function with respect to the locking plate 80 as does the spring ‘59 with respect to the locking plate ‘it. In this position the swing cam. 38 is held so that 55 the movement oi.’ the dial needles effected by the cam 38 is such as to form tuck stitches. When the tail end of the locking plate has been moved _ to free its shoulder ‘l8 irom the nose of the strik ing plate W, the latter will move inwardly and 60 will be caught by the shoulder M to hold the 70 striking plate at the intermediate position. Simi larly, the tail end of the locking plate 80 when it is required to free its shoulder 81 from the nose of the striking plate can also be swung aside. Any preferred mechanism such as is well under stood in the art may be employed for displacing the locking plates 16 and 80 to disengage them from the nose of the striking plate ‘I0. For the slide 43 there is also a striking plate 83 plvotally mounted on a stud 84, and a locking plate 85 having a shoulder 86 to engage the nose of the striking plate 83. Springs 81 and 88 serve to control the movements of the striking plate and locking plate‘ in the same manner that the 75 springs 15 and ‘I! control the striking and locking plates respectively for the swing cam 38. In Figure 4, the butts only of the dial needles and transfer-points are shown in the various positions around their respective tracks, and in these butts have been designated with the same reference numerals as have been employed for the actual needles and transfer-points shown in full. By means of the present invention an inturned 10 welt can be formed for the tops of hose. To form such a welt with the aid of the mechanism just described, the following knitting process is em ployedz-First, two or more courses of ribbed knitting are produced with the aid of the dial and cylinder needles. The dial needles are then retracted to the inoperative position whilst still retaining their loops.- A number of courses of plain knitting are then produced using all the cylinder needles for which purpose the needles, such as H, previously held inoperative during the knitting of the ribbed courses, are moved 20 upwardly into position with the aid of the cam ll. When the required length of plain knitting has been produced sumcient for the welt, the latter 25 is completed by transferring the loops from the dial needles to the corresponding cylinder nee dles with the aid of the transfer-points in the manner Just described above with reference to Figure 4. Thus, needles to which the loops have 30 been transferred will have two loops on them, and these two loops will be knitted together in the next course of plain knitting. The invention also includes hose, half-hose and other fabrics knitted on the machine or with the aid of the dial transfer mechanism above described and by the methods set forth. In the cam-box for the needle cylinder, the usual heel and-toe stitch cam mechanism, indicated gener ally by the reference numeral 50, will be provided 40 when it is required to knit hose and half-hose, but it will be appreciated that the invention can be applied to any type of circular knitting ma chine. In the example illustrated, it is intended that the'cylinder cam-box and the dial cam 45 plate shall be rotated while the needle cylinder and the dial needle bed 60 remain stationary. In a manner well understood, however, this can be reversed and the cylinder and dial beds can revolve while the cam-boxes remain stationary. 50 The extremities of the transfer-points such as 25, are preferably slightly downtumed as illus trated, as in this form they are found to enter the loops more freely because the extreme point will be somewhat below the level of that surface 55 of the dial needle on, which the loop, at the time of transfer, is retained. I claim: 1. For a circular knitting machine, the combi nation of a needle-cylinder, needles therein, a needle-dial, needles of standard type in said dial, loop-transfer points each associated with a dial needle and slidable in ‘said dial alongside and independently of its needle in a path substantially parallel with that of the needle, a cam to move the transfer points to engage loops on the dial needles, a dial needle clearing cam to clear loops on the dial needles, a withdrawal cam for the dial . needles to move them to yield their cleared loops to the transfer points, and a cam to raise the cylinder needles to receive loops from the trans fer points. ‘ 2. For a circular knitting machine, the combi nation of a needle-cylinder, needles therein, a needle-dial having needle-tricks formed therein, 75 4 ' 9,100,872 needles of standard type in said tricks, loop tr - loop transfer-points each associated with, and fer points each slidlngly disposed in the same slidable alongside a needle to which it is allocated, trick with and alongside a needle to which it is butts _on the needles. and transfer-points, and’ allocated but movable independently of said dial cam mechanism comprising two tracks, one needle, a cam to move the transfer points to en for the needle butts and one for the butts of the gage loops on the dial needles, a dial-needle clear transfer-points, a cam surface associated with the ing cam to clear loops on the dial needles, a with transfer-point track to project the transfer drawal cam for the dial needles to move them points outwardly to enter loops on their associ to yield their cleared loops to the transfer points, ated dial-needles, and in the needle track a cam 10 and a cam to raise the cylinder needles to re surface operable to move the dial-needles inward 10 ceive loops from the transfer points. ly so as to leave their loops on the associated 3. For a circular knitting machine, the combi-v transfer points, and a third cam surface for the nation of a needle-cylinder, needles therein, a transfer-point track and operable on the trans needle dial, needles of standard type therein, and 15 loop transfer points each of which is associated with and is slidable alongside but independently of an associated dial needle and has a loop-en gaging extremity that is formed to pick up a loop from a dial needle and has a portion oifset‘in av 20 plane transverse to the axis of the needle—cylin der to afford a channel into which a cylinder needle can freely pass in order to'enter a loop held by the transfer point. 4. For a circular knitting machine, a needle 25 dial, needles in said dial, transfer points one for each needle, each such transfer point being slid able alongside and independently of its needle and tricks formed in the dial of sufficient width to accommodate both a needle and its associated 30 transfer point. r, 5. For a circular knitting machine, the combi nation of a needle-cylinder, needles therein, a needle-dial, needles of standard type in said dial, loop-transfer points each associated with, and 35 slidable alongside a dial needle to which it is al located, and dial cam mechanism comprising a cam surface acting vto project a transfer-point outwardly to enter a loop on its associated dial needle, a second cam surface operable to move 40 said associated dial needle inwardly to leave the loop on the transfer point, and a further cam surface operable on the transfer-point subse quently to withdraw it in order to cast oil! the loop held thereby on to a cylinder needle. 45 6. For a circular knitting machine, the combi-' nation of a needle-cylinder, needles therein, a needle-dial, needles of standard type in said dial, ’ fer points submquently to withdraw them to cast oi! their loops on to cylinder needles.‘ 15 7. For a circular hitting machine, the combi nation ‘of a needle cylinder. a needle dial, needles of a standard type in said dial, and loop transfer points each with and slidable along-I side a needle to which it is allocated, and dial 20 cam mechanism comprising tracks for dial needles and transfer-points, movable cam sur faces constituting portions of both tracks, and a single movable member operatively connected to both movable portions so that they are actuated 26 in company to project their associated needles and transfer-points respectively for a transfer operation. ' 8. In the operation of a circular knitting ma-. chine having a needle cylinder with needles there 30 in, a needle dial with needles and ‘transfer-points therein having the transfer’points each associ ated with and slidable alongside the dial needle to which it is allocated, and dial cam mechanism for actuating the dial needles and transfer-points, the steps of knitting an inturned welt which com prise operating the dial and cylinder needles to form a plurality of courses of ribbed knitting, re tracting and discontinuing the operation of the dial needles with loops retained thereon while 40 operating all the cylinder needles to produce the required length of plain knitting, then operating the transfer-points to transfer the loops from the dial needles to corresponding cylinder needles, and continuing the operation of the cylinder needles to produce plain knitting. ‘ ' HENRY HAROLD HOLMES.