US1894885A - Sewing machine and method of forming stitches - Google Patents

Description

Jan. 3'7, 1933.. F2. NPARKEN SEWING MACHINE AND METHOD OF FORMING STITCHES Filed July 17, 1950 11 Sheets-5heet l Jan. 17, 1933. R. N. PARKlN 1,894,835

SEWING MACHINE AND METHOD OF FORMING STITCHES Filed July 17, 1930 1.1 Sheets-Sheet 2 Jan. 17, 1933. I R; N. PARKlN 1,894,885

SEWING MACHINE AND METHOD OF FORMING STITCHES Jan. 17, 1933. R. N. PARKIN 1,894,885

SEWING MACHINE AND METHOD OF- FORMING STITCHES Filed July 17, 1930 Sheets-Sheet 4 Jan. 17, 1933. R, R IN 1,894,885

SEWING MACHINE AND METHOD OF FORMING STITCHES Filed July 17. 1930 Jan. 17,1933. R. N. PARKIN SEWING MACHINE AND METHOD OF FORMING STITCHES Filed July 17, 1930 ll sheets-Sheet 6 Jan, 17, 1933. PAR N 1,894,885

SEWING MACHINE AND METHOD OF FORMING STIT'CHES Filed July 17, 1930 11 Sheets-Sheet 7 Jan. 17, 1933. PARKIN 1,894'5885 SEWING MACHINE AND METHOD OF FORMING STITCHES Filed July 17, 1930 11 Sheets-Sheet 8 '3 {@Zs 61% v N W Jan. 17, 1933 R. N. PARKHN SEWING MACHINE AND METHOD OF FORMING STITCHES Filed July 17, 1930 ll sheets-5116GT, 9

Jane 17, 1933 R. N. PARKIN SEWING MACHINE AND METHOD OF FORMING STITCHES Filed July 17, 1930 11 Sheets-Sheet 10 air.

Jan. 17, 1933 N F v 1,894,885

SEWING MACHINE AND METHOD OF FORMING STITGHES Filed July 17, 1930 ll Sheets-Shet ll Patented Jan. 17, 1933 sir are ROBERT N. PARKIN, OF IPAD'UCAI-I, KENTUCKY, ASSIGNOR TO SOUTHERN TEXTILE MACHINERY COMPANY, OF PADUCAH, KENTUCKY, A CCBPOBATION OF KENTUCKY SEWING MACHINE AND METHDD OF FORMING STITCHES Application filed July 17,

This invention relates-to improvements 1n sewing machines and particularly to that type of sewing machine especially adapted for uniting sections of knitted materials.

In its broadest 'aspect'the invention contemplates not only a novel form of sewing machine but also a novel form of stitch and method of producing a seam composed of thatparticular form of stitch. More specifically, the invention has for one object the production of an interlocking stitch for uniting twopieces of material. Two threads are used in producing the stitch, each thread being passed through the materials to be united, from opposite sides thereof, and loops formed therein through which the other thread is passed before said other thread itself is projected through the materials to be joined and before the looped thread is withdrawn. successively formed stitches of this character will be held against raveling out under any conditions as distinguished from the unraveling that takes place in the ordinary piece of knitted goods.

Another object is to provide a machine that is especially adapted for uniting two pieces of knitted materials with this form of stitch, the machine comprising a series of moving impaling pins on which the loops of the materials to be united are placed. Two thread needles operatively associated with said impaling pins are adapted to be passed back and forth through the loops on each impaling pin in the production of the stitches for uniting the two materials. By having the needle thread of both needles passing through each of the alined loops of the materials to be joined not only is an interlocking stitch produced but the cross section of the combined threads is such as to substantially fill the loops of the materials being united so that when said materials are stretched, as for instance, a sweater being placed on ones body, there will not be present the row of openings or unfilled spaces that are quite often found in seams in articles such as sweaters.

Another object of the invention is to simplify the construction of the machine and, in connection with dial loope'rs for the uniting 1930. Serial No. 463,656.

of knit goods, the invention also seeks to reduce the overall space occupied by the machine. lin this connection, the source of power and practically all of the operating connections for the thread needles are located within the periphery or radius of the ring of impaling pins commonly employed in dial looper machines.

l Vith these and other objects in view the invention consists in certain details of construction and combinations and arrangements of parts all as will hereinafter be more fully described and the novel features thereof particularly pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is a top plan view of a machine embodying the present improvements;

Fig; 2 is an elevational view, partly in section, of a portion of the machine;

Fig. 3 is a similar view but showing, in section, the mounting of the needle arm supports;

Fig. t is a bottom view of the bed plate of the machine, the pedestal for said plate being shown in section;

Fig. 5 is an enlarged detail plan view of the impaling pins;

Fig. 6 is a vertical sectional view on line 66 of Fig. 5;

Fig. 7 is a horizontal sectional View on the line 77 of Fig. 6;

Fig. 8 is a vertical sectional view on the line 88 of Fig. 6;

Fig. 9 is a similar view on the line 99 of Fig. 6;

Fig. 10 is a sectional view on line 1010 of Fig. 8;

Fig. 11 is a detail perspective view of the cams for elevating and compressing the jacks or needle thread stops;

Fig. 12 is a detail perspective view of one of the thread needles and its arm;

Figs. 13 to 20, inclusive, illustrate the various positions assumed by the thread needles in a complete cycle of operation of the ma chine;

Fig. 21 is a diagrammatical illustration of the cams for imparting lateral movements to the thread needles;

Figs. 22 and 23 are similar views showing the cams for imparting the reciprocatory motions to the needles;

Fig. 24 is a detail view, more or less diagrammatic, illustrating the stitches produced on the present machine in connection with the loops at the edge of a piece of knitted material;

Fig. 25 is a sectional view on the line 25- 25'of Fig. 24; g I

Fig. 26 is a detail perspective view of the two thread needles;

of the present invention are concerned, it is preferred that the machine be mounted on a pedestal or standard 30. Mounted at the up per end of pedestal 30 is what will be termed the bed plate 31 of the machine and, as is common in this art, this bed plate has revolubly mounted thereon the impaling pins 32. These impaling pins 32 are rigidly mounted in segmental sections 33 detachably secured, in ring like form, in an annular member 34 adapted to revolve on bed plate 31. As

shown in Fig. 3, this annular member 34 has a flange portion 35 which engages in a oove 36 near the periphery of plate 31, being held in said groove by a clamping ring 37. To reduce the overall dimensions as a whole, there is bolted on the standard or pedestal 30, at a point below plate 31, a support 38 for the motor 39, which serves as a source of power for the machine. The shaft 40 of the motor 39 has an extension 41 car rying a worm 42, which meshes with worm wheel 43 mounted on a. vertically disposed shaft 44. Mounted on shaft44 is a worm 45 meshing with gear46 on a shaft 47 mounted in a bearing member 48 on the bottom face of plate 31. This shaft 47 has, at its outer extremity, a gear 49 in mesh with a ring gear 50 on the bottom of the annular member 34 in which the impaling pins 33 are carried. As will be apparent, the impaling pins may be revolved around said plate 31 through the connections just described from motor 39, the motor being included in a circuit (not shown) adapted to be opened and closed by a switch actuated by the push buttons 51 from the upper face of bed plate 31.

Shaft 44 extends above bed plate 31 and at its upper portion has mounted thereon a gear 52 that meshes with a gear 53 on a shaft 54 mounted in bearings in brackets 55 boltr ed on the upper face of plate 31. This shaft 54 has mounted thereon a plurality of cam members 56, 57 and 58, 59 which, in conjunction with mechanism now to be described, impart the necessary movements to the thread carrying needles of the machine. Referring particularly to Figs. 1, 2 and 3 there are two thread needles 60, 61 that are adapted to pass through loops on the impaling pins from oppositesides of said loops. Needle 61 which passes through loops from the inner side of the ring of impaling pins to the outer side, is mounted on a needle arm 62 journaled on a shaft 63, said shaft being mounted in an upwardly extending bracket 64 that, in turn, is bolted at its lower extremity by bolts 65 to the bed plate 31. The outer needle 60 is likewise mounted on an arm 66 journaled on a shaft 67 in bracket 68, which is also secured toplate 31 by similar bolts 65. In order to'raise or depress the needles 60, 61 with respect to theimpaling pins,

bracket 68 has an offsetportion 69 at its low- 7 er portion, this offset portion 69 beingof such length as to be interposed between the bed plate 31 and the lower extremity of bracket 64, asshown in 3'. In other words, bracket 64 is secured. to the plate 31 by the bolts 65, these bolts extending through the oifset 69 of bracket 68. With this arrangement, the bottom face of the offset portion 69 can be formed with a knife edge 70 bearing on the bed plate 31, and'by easing up on the screws 65at one side of thisknife edge and taking up on the other screws 65 the needles 60, 61 maybe adjusted vertically toward and from the impaling pins 32. Also, as shown in dotted lines in Fig. 3, the lower portion of bracket 64 is provided with elongated slots 71 to receivethe bolts 65 and with a rib 72 working ina way 7 3 in the oilset 69 of the other bracket whereby shaft 63 ice 7 and needle arm 64 may beadjusted radially each other. 7

In view of the fact that the impaling pins move continuously on the bed plate 31 it is necessary to provide means for moving needles 60, 61 laterally so that they may move in unison with the impaling pins when they are in engagement with the loops of knitted fabric on the impaling pins. As will also appear, in the production of the stitch contemplated by the present invention, it is also necessary to impart a lateral movement to the needles when they are Withdrawn from the goods or materials constituting the work on the impaling pins. F or'these reasons, the needle arms are formed with two bearings 74 for the shaft on which they are mounted, these hearings being spaced from one an other so as to receive between them alyok'e like member 75 carried at the outer end of nections for imparting lateral movement to GOT the needle arms' and their needles The le ver for needle is indicated at 76 and the lever for needle 61 is indicated at 77. These rocking levers 76, 77 are pivotally mounted on brackets 79 bolted to bed plate 31, Preterabl said levers are pivotally mounted by means of boltsSdextending through slots 81 in said levers whereby the leverage may be altered at will.

To impart a. reciprocatory motion or r'oc ing mot-ion to the needle arms they each h are attached thereto a connecting rod, the connecting rod for needle arm 66 being indicated at 82 and the rod for arm 62 being indicated at 83. Rod 82 is connected to one arm 84 of a bell crank lever whose other arm carries cam roller 86 engagin in the cam groove in the side face of camming member 56 on shatt 54. Likewise, connecting rod 83 oi needle 61 is attached to one arm 84- of the bell crank lever whose other arm 85 carries the cam roller 86, which engages in a camgroove 87 oi cam member 5? on d shalt For imparting the lateral motions to the needle arms the inner ends of rocking members 76, 77 carry cam rollers 88, 89 engaging in cam grooves 90, 91 in the cam members 58, 59 on shaft 54. As will appear from 1 and 3, the throw imparted to the needle a1 may be regulated by reason of the fact that their connecting rods are made sectional, the sections being attached to each other by a coupling in which said rod sections are threaded whereby the length of the rod may be al ,ered at will, Also. not only may the throw of rocking levers 7 6, 7'? be varied by altering their leverage but said levers are adj ustah-ly mounted on the brackets 2 9 by means or" a pin and slot connection (see Fig. 3).

As shown in 2 and 3, the threads 9%, 95 for the needles are supplied from spools 96 suitably supported on a stand 97 above the machine. The threads are led thro suitable guides from the spools to their 1 spective needles. In Fig. 8 needle 61 is shown in full lines in its retracted position. cam roller 86 then being in engagement with the low portion of cam slot 87 At this time, cam roller 89 of melting lever 77 is in engagement with that portion of its cam slot 91 which will effect a movement of needle 61 nece to pass the end of said needle and threao between needle 60 and thread 9-4: for the purpose of forming a l op in said thr ad it being understood that, also, at this time, needle 60 will have been advanced through the materials being worked on so that the end thereof is in a position where thread can be passed through the loop of thread 942-. he various positions assumed by the neeel es in making these loops in the threads are shown in Figs. 13 to 20. inclusive, and will be later described in detail. litter needle 61 has been actuated to form a loop in thread 9% of nee-ole 60, said needle 61 is advanced through materials on the 'impaling pins 32, as indicated in dotted lines in F 3. This advance of needle 61 is ell'ected by cam roller 86 on elevated or highe' positions of cam-way 87 l/Vhen needle 61 has been advanced to the position shown in dotted lines in 3, needle 60 will have then been removed to its retracted position, at which time needle 60 will be actuated to form a loop in thread 95 and pass thread 94 therethrough. It will be understood that needle 60 and its needle arm 66 are actuated by cam slots 87 and 90 in cams 56, 58 needle 61 is actuated from cams 57, 59.

When one of the needles has been projected or advanced through materials on the impaling pins and a loop formed in said thread and the other thread passed through said loop, the latter thread prevents the withdrawal of the loop from the materials. However, if the machine is operating and no ma terials are present on the impaling pins 32 the proper stitches will not be made. In fact the machine should be stopped in the absence of work. in order to avoid this stoppage or" the machine in the absence of work, there is provided a series of what might be termed stops, or what are commonly called in the art jacks, which serve as substitutes for work on the impaling pins. These jacks are shown in detail in Figs. 5 to 11, inclusive, there being a jack located between each pair of impaling pins. The jacks 98 have pin like upper extremities and at their lower extremities are formed offsets 9%). The bodies of the acks are free to move vertically in slots 100 in the pe ripheral face of ring member and their oli'set portions 99 res; on a ledge 101 formed by a depending portion of the ring member Slots 100 are open at the periphery of ring member and a band 102 1s placed around the periphery of said ring for the purpose of retaining the acks in their slots. Q d l"l "lf" tl l l' Upacc i 121C la inwarc 10m ic c epenc mg portion 101 or ring B l is a cam member 103, shown in detailn Fig. 11. 'his cam member is located at point where it will engage the jacks as they approach the point of operation of needles 60, 61, and tie formation of the cams on this cam member or plate is such that as the acks engage the camming surface 104- they will be elevated so that their pin like upper extremities project upwardly above the impaling pins 32. This upward movement is imparted to the jacks, as just mentioned, immediately before they reach the point where they pass the needles and after they have passed the needles they engage a second cam surface 105, on plate 103, which will depress them to their original or normal position. By the provision. of these acks the machine can continue operation even though there be no work on the impaling pins be cause when the needle moves as it normally would, to engage work on one of the pins, it

will pass between two elevated acks so that when the thread thereof has a loop formed therein and the other thread passed through said loop the jacks will function just as would a piece of work on the impaling pins. This will more clearly appear from Figs. 13 to 21.

In Figs. 13 to the upper extremities of a portion of jacks 98 are shown at a, Z), 0, (Z

and c, it being understood that the jacks at 30 this point are in their elevated position. At the time the needles are in the position shown in Fig 13 cam rollers 88, 89 are in the position indicated at A, in Fig. 21, and cam rollers85, 85 are in the positions A, indicated in Figs. 22, 23; Rotation of the several cams on shaft 54 brings rollers 88, 89 to positions indicated at B,"in Fig. 21, and rollers 85, 65 to positions'B, in Figs. 22, 28. This movement of the cams efi'ects aslightlateral movement of 20 needle 60 so that it will move laterally in unison with the impaling pins and will effect a slight retraction of said needle from between the jacks a, b, and from the loops of material that will normally be onthe impaling pin located between jacks (Land 6. This cam movement will also efiect an advance of needle 61 and a lateral movement of said needle 61 with respect to needle 60, the advance of the needle being at a little higher rate of speed than the retraction of needle 60 so that the point of needle 61 would tend to pass between thread 94 and needle 60 to form a loop in said thread, as shown in Fig. 14. Then the several cam rollers reach positions indicated at B, B, in Figs. 21 to 23, the needles would have assumed the positions shown in Fig. 15, that is needle 60 would be still further retracted and needle 61 would have entered be tween jacks 0, cl, and projected through loops impaled on the pin 32 located between said jacks 0, cl. .Vhen the several cam rollers reach positions D, D, indicated in Figs. 21 to, 23, the needles would have assumed the positions shown in Fig. 16, wherein needle 60 is fully retracted and needle 61 has passed further between the jacks 0, (Z, and the loops of material that would normally be on the impaling pin located between said jacks a, d. At this time, needle 61 will be moving slightly latorally in unison with the revolving or laterally moving impaling pins, the contour of the cam grooves in Fig. 21 being such that there is alwaysa lateral movement of the needles when they are in work engaging position.

. When the several cams reach the positions inin this figure, needle 60 is in position to be further advanced between jacks between jacks c, d. This continued movement of the needles is shown in Fig. 19,

the needles assuming the position shown needle in the direction of the arrows in Fig.

19 until they next assume the position shown in Fig. 13, at which time the cam rollers will have assumed the position indicated at A, A, in Figs. 21 to 23. On the next following cycle of operations needle 61 will pass between jacks d and 6 instead of between 0 and d. In other words, during the formation of the stitches shown in Figs. 13 to 19 the impaling pins will have been moved one step, so to speak. Likewise, when needle 60 is advanced from the position shown in Fig. 20 it will pass between jacks c and (1 instead of between jacks b and c, as shown in Fig. 18. In these Figs. 13 to 20 it will be understood that the impaling pins have not been illustrated in order to avoid confusion and each time one of the needles passes between two jacks, shown in these figures it is the equivalent of having advanced through fabric or loops of knitted materials impaled on the impaling pins. In Figs. 24 and 25, there is shown more or less diagrammatically the formation of the interlocking. stitching produced by the present machine. In Fig. 2 1 loops 106 of one piece of material are seen in elevation and in Fig. 25 loops 106 as well as the loops 107 of a second piece of material are shown in section. These views also show clearly how the loops 94 in said thread 94: are held against withdrawal from between the loops of knitted materials by the thread 95 and how the loops 95 in said thread 95 are likewise held against withdrawal from between the loops 106 and 107 by the thread 94.

In Figs. 27 and 28 there is shown a looper machine for use in connection with tubular knitted work. In this type of machine there is a base 150 and mounted on said base is a bearing plate 151 on which is rotatably mounted a tubular impaling pin support 152. Said impaling pin support is secured to the bearing plate 151 by a clamping or holding down ring 153. At itsupper extremity the impaling pin support is adapted to receive the segmental members 15-1 in which are secured the impaling pins 155. As will be understood the work is adapted to be suspended from the impaling pins, the greater portion of the work extending downwardly within the tubular pin support 152. On the exterior of said support there is a ring gear 156 adapted to be driven by a worm 157 on b, 0, as' needle 61 is completely withdrawn from shaft 158, torque being applied to said shaft by means of a gear 159 mounted thereon and meshing with a similar gear 160 on a shaft 161. Said shaft 161 also has mounted thereon a worm wheel 162' adapted to be driven by a worm 163 on a shaft 164 driven by a motor (not shown). 7

The driving connections for the impaling pin support are, of course, located at one side of said support and mounted on the shaft 161 are the cams 165, 166 and'167, 168 for actuating the thread needles 179, 180. The operating' connections between said thread needles 179, 180 and shaft 161 are identically the same as those shown in the previously described embodiment of the invention. A de tail description thereof is not deemed necessary in view of this. Sufiice it to say that needles 179, 180 are carried by needle arm supports 181, 182 journaled on shafts 183, 184, these shafts beingv mounted in brackets 185, 186. For working the needle arms for the purpose of reciprocating the needles, each arm has connected thereto an adjustable rod 187 and each rod is connected to one arm of a bell crank lever 188, whose other arms are provided with cam rollers 189 Working in cam slots or cam grooves in cams 165, 166. For imparting the lateral movements to the needles for the purpose of causing them to travel in unison with the impaling pins when engaged in loops of the work on said pins and for causing each needle to be moved laterally for the purpose of passing the thread thereof through a loop in the thread of the other neelle, as described in connection with the other embodiment of the invention, each needle arm is adapted to be moved longitudinally of its respective shaft by means of working levers 190. Each of these levers has, at one end thereof, a yoke like member 191 adapted to engage between the bearing portions of its respective needle arm and at their opposite ends said working levers 190 carry cam rollers 191 working in the cam grooves 192 of cams 167, 168. Threadsfor the two needles are indicated'at 193, 194i. Theoperation of this type of the apparatus it is believed will be readily understood without further description.

Asha's been before mentioned certain fea tures of the present inventlon are not necessarily limited to use in looper machines. For

instance, the peculiar stitch produced on the present machine may be utilized for forming a seam in any kind of fabric'm'aterial. The

- material does not necessarily have to be knitted and where the material is not knitted the work support, or the support for the materials, need not necessarily take the form of impaling pins such as are now in general use in looper machines. 1 What I claim is:

.1. In a sewing machine, the combination of means for supporting a piece of fabric, a pair of thread carrying needles, means for ad vancing each needle through the fabric and then retracting the same, one needle being advanced while the other is retracted, and means for moving each needle laterally when retracted for passing the thread thereof through a loop in the thread ofthe other needle.

In. a sewing machine, a continuously traveling support for pieces of fabric to be united, a thread carrying needle normally polieo-ned at each side of the fabrics on said support, means for alternately projecting said needles through the fabrics on said support, and means for moving said needles laterally for passing the thread of each needle through a loop in thread of the other needle when the latter is in its projected position.

3.111 a sewing machine, a continuously moving support for fabrics to be united, a thread carrying needle normally positioned each side of said support, means for alternately projecting said needles through the fabrics on said support, means for moving s l needles laterally while in engagement with said fabrics, and means for imparting a second lateral movement to each needle when in normal position to pass the thread hereof through a loop in the thread of the other needle. 111 a? sewing machine for uniting knit iaorics, bilG combination of a series of 1mpaling pins, a pair of thread carrying needles, and means for moving said needles laterally for forming loops in said threads at opposite sides of the pieces of fabric to be united and passing each of said threads through the loops formed in the other thread.

5. In a machine for uniting knit fabrics, the combination of a series of impaling pins adapted to be inserted in loops of the fabrics to be united, a pair of thread carrying needles ada .ted to be projected through the fabric loops on said pins, and means for forming a loop in the thread of each needle and passing the thread of the other needle through said loop after the first mentioned needle has been projected through the fabric loops.

6. In a machine for uniting knit fabrics, the combination of series of impaling pins adapted to be insert-ed in the loops of the fabrics to be united, a thread carrying needle normally positioned at each side of the fabric loops, means for projecting and retracting said needles through the fabric loops, and means for passing the thread of each needle through a loop in the thread of the other needle after the last mentioned needle has been projected through the fabric loops.

7. In a machine for uniting knit fabrics, the combination of a series of impaling pins for loops of the fabrics to be united, a thread carrying needle normally positioned at each side of the loops on said pins, means-for advancing one needle to project it through theloops on apin into proximity to the other needle, means for passing the thread of said other needle through a loop in the thread carried by the advanced needle, and means for retracting the advanced needle and simultaneously advancing said other needle through loops in said fabric.

through a loop in the thread of the first, needle, and means for projecting the second needle through the loops on a second impaling pin and retracting the previously advanced needle.

9. In a machine for uniting knit fabrics, the combination of a series of impaling pins for the loops of the fabrics to be united, a thread needle normally positioned at each side of the loops on said pins, means for projecting one needlethrough loops on one pin into proximity to the second needle, means for passing the thread of said second needle through a loop in the thread of the first needle, and means for projecting the second needle through the loops on a second impaling pin and retracting the previously advanced needle, and means for passing the thread of the retracted needle through a loop in the thread of said second needle. v

10. In a machine for uniting knit fabrics, the combination of a series of impaling pins for the loops of the fabrics to be united, a thread needle normally positioned at each. side of the loops on said pins, means for projecting one needle through loops on one pin into proximity to the second needle, means for passing the thread of said second needle through a loop in the thread of the first needle, means for moving said second needle longitudinally of the first needle and projecting it throu h the fabric loops, and means for retracting the first needle from the fabric loops during the advance of the second needle.

'11. Ina machine for uniting knit fabrics,

the combination of a series of impaling pins for the loops of the fabrics to be united, a

' thread needle normally positioned at each side of the loops on said pins, meansfor projecting one needle through loops on one pin into proximity to the second needle, means for passing the thread of saidsecond needle through. a loop in the thread of the first needle, means for moving said second needle longitudinally of the first needle and project ing it through fabric loops on a second impaling pin, and means for retracting the first needle from the fabric loops.

jecting one needle through loops on one pin 7 into proximity to the second needle, means for passing the thread of said second needle through a loop in the thread of the first 5 needle, means for movingsaid second needle longitudinally of the first needle and projecting it through fabric loops on a second impaling pin, and means for retracting the firstneedle from the fabric loops, and means for passing thethread of the retracted first needle through a loop of the thread of the advancedsecond needle.

13. In a machine for uniting knit fabrics. means for supporting loops of said fabrics in alinement with each other, a pair of thread carrying needles, means for alternately advancing and retracting said needles to suecessively project them through alined loops of said fabrics, and means for passing the thread of each needle when retracted through a loop in the thread of the other needle.

14. In a machine for uniting knit fabrics, means for supporting loops of said fabrics in alinement, a pair of thread carrying needles, meansfor advancing and retracting said needles to successively project them through alined loops of the fabrics to be united, and means for moving each needle when'retracted laterally of the other needle and passing the thread ofthe first mentioned needle through a loop in the thread of said other needle.

15. In a sewing machine for'uniting knit fabrics, means for supporting loops of said tractin g and then advancing the other needle,

to withdrawit from and project it through alined loops of said fabrics, and means for inserting each needle when retracted between the othervneedle and the thread carried by said other needle while said other needle is in its advanced position whereby the thread of the first mentioned'needle is passed through a loop formed in the thread of said other needle. 7

16. In a machine for uniting knit fabrics, a series of constantly moving impaling pins adapted to have placed thereon loops of the moving impaling pins adapted to have placed thereon loops of the fabrics to be united, a pa1r of thread carrying needles, means for advancing and retracting each needle to project it through and withdraw it from loops on said pins, means for moving each needle laterally While engaged in the fabric loops, and means for forming a loop in the thread of each needle when advanced and passing the thread of the other needle through the loop so formed.

18. In a machine for uniting knit fabrics, the combination of a series of impaling pins adapted to have placed thereon the loops of fabrics united, a pair of thread carrying needles, means for advancing and retracting each needle to project it through and withdraw it from the loops on said pins, means for moving each needle laterally while ongaged in the fabric loops, and means for moving each needle laterally when retracted and inserting it between the other needle and the thread of said other needle when said other needle is in its advanced position whereby a loop is formed in the thread of said other needle.

19. In a sewing machine, the combination of a series of impaling pins, means for moving said pins laterally, a pair of thread carrying needles, means for advancing and retracting each needle longitudinally of said pins, means for passing the thread of each needle when retracted through a loop in the thread of the other needle, and stops adapted to extend through the plane in which said needles move when advanced and retracted, one of said stops being positioned between each pair of impaling pins.

20. In a sewing machine, the combination of a plurality of impaling pins, means for moving said pins laterally, a pair of thread carrying needles, means for advancing and retracting each needle longitudinally of said pins, means for passing the thread of each needle when retracted througn a loop in the thread of the other needle, a stop between each pair of impaling pins, said stops being movable in unison with said pins, and means actuating said stops for temporarily positioning them across the plane in which the needles travel when they are advanced and retracted.

21. In a sewing machine, the combination of a series of impaling pins, means for moving said pins laterally, a pair of thread carrying needles, means for advancing and retracting each needle longitudinally of said pins along one surface of said pins, means for passing the thread of each needle when retracted through aloop in the thread of the other needle, a stop slidably positioned between each pair of pins and normally located to one side of the plane traversed by said nee- .lateral movement to said pins, a pair of dles, said stops being movable with said impaling pins, and a cam engaging said stops to project each stop beyond the plane traversed by said needles as said stop approaches saidneedles, and tomaintain each stop int'Z such projected position until it has passed said needles.

22. In a sewing machine, the combination of a supporting plate, a series of impaling pins movable on said plate, a pair of thread; '7 carrying needles, a thread arm for each needle, a support on which each arm is mounted, means for rocking said arms on their supports to advance and retract each needle longitudinally of said pins, meansell for moving each arm laterally on its support while its needle is in engagement with work on said pins, and means for imparting an additional rocking and lateral movement of each arm to pass the thread of its needlee5 when the latter is in retracted position through a loop in the thread of the other needle.

, 23; In ,a sewing machine, the combination of a supporting plate, aseries of impalingi pins on said plate, means for imparting a lateral movement to said pins, a pair of thread carrying needles, an arm for each needle, a pivotal support for each needle arm,

,means for rocking said arms on their pivotal supports to advance and retract their respective needles longitudinally of said pins, means for moving said needles laterally while engaged with work on said impaling pins, means for rocking said needle arms and moving said arms laterally on their pivotal 7 supports when their respective needles are in retracted position to pass the thread of their respective needles through a loop in the r thread of the other needle, and means for g" ,adjusting the pivotal supports of said needle arms and needles to vary the distance between the impaling pins and the plane in which said needles are advanced and retracted.

24. In a sewing machine, the combination of a supporting plate, a series of impaling pins on said plate, means for imparting a thread carrying needles, an arm for each nee- 3-115 dle, a. pivotal support for each needle arm, means for rocking said arms on their pivotal supports to advance and retract their respective needles longitudinally of said pins, means for moving said needles laterally while engaged with work on said impaling pins, means for rocking said needle arms and moving said arms laterally on their pivotal supports when their respective needles are in retracted position to pass the thread of their respective needles through a loop in the thread ofthe other needle, and means for adjusting the pivotal supports of said. needle arms and needles to vary the distance between the impaling pins and the plane in shaft, and connections between said cams and needle arms for rocking'said arms and for moving said arms laterally of their bearings.

ROBERT N. PARKIN.

means for rocking said arms on their pivotal supports to advance and retract their respective needles 7 longitudinally of said pins, means for moving said needles laterally whileengaged with work on said impaling pins, means for rocking said needle arms and moving said arms laterally on their pivotal supportswhen their respective needles 7 are in retracted position to pass the thread i of their respective needles through a loop in the thread of the other needle, means for adjusting the pivotalsupports of said needle arms to alter the distance between said impaling pins and the plane traversed by the needles when advanced and retracted, and means for adjusting one of said pivotal supports for regulating the distance between V the points'of the two needles.

26. In-a sewing machine of thedial looper type the combination of a standard, a plate mounted on said standard, a series of impaling pins rotatable on said plate, a pair of thread carrying needles operatively associated with said inipaling pins, a driven shaft,

bearings for said shaft on said plate, a plurality of cams on said driven shaft, and connections between said cams for reciprocating said needles and moving said needles laterally.

27. In a sewing machine of the dial loopertype, the combination of a standard, 9.

motor support on said standard, a plate on said standard, a series of impaling pins revolubly supported at the periphery of said plate, a cam shaft, bearings on said plate for said cam shaft, thread carrying needles operatively associated with the impaling pins, a pair of cams on said cam shaft, connections between each of said cams and one of said needles for reciprocating the same,

a second pair of cams on said cam shaft, and connections between said second pair of cams and said needles for moving the latter laterally.

=28. In a sewing machine of the dial looper type, the combination Ora standard, a plate on said standard, a series of impaling pins revolubly supported at the periphery of said plate, a pair of thread carrying needles oprerat'ively associated with said impaling pins, needle arms, bearings for said needle arms mounted on said plate, a driven shaft, bearings for said driven shaft mounted on said plate, a plurality of cams on said driven

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