US1782375A - Loop retainer and mechanism therefor - Google Patents

Description

Nov. 18, 1930. L. N. D. WILLIAMS ET AL 2,

LOOP RETAINER AND MECHANISM THEREFOR Filed Sept. 11. 1928 5 Sheets-Shet 1 INVENTLRS" LOUIS N.D'.WII L.IAMS

HARRY SWINGLEHURSTJR y (hair attorneys INVENTORS Nov. 18, 1930.

L. N. D. WILLIAMS ETAL LOOP RETAINER AND MECHANISM THEREFOR FiI Led Sept.

11. 1928 5 Sheets-Sheet 2 LOUIS N.D.WlLLl/"MS HARRY SWINGLEHURST Nov. 18, 1930. N. D. WILLIAMS ET AL 1,732,375

LOOP RETAINER AND MECHANISM THEREFOR Filed Spt. 11. 1928 v 5 Sheets-Sheet 3 INVENTOR'S LOUIS N.D.W|LLIAMS HA RRY SWINGLEHURST JR. @y iheir attorneys Nov. 18, 1930. L. N. D. WILLIAMS ET AL 1,782,375

LOOP RETAINER AND MECHANISM THEREFOR Filed Sept. 11. 1928 5 Sheets-Sheet 4 v 1a" w v Ii 5 I i 55 i I 6%! a Iv e If F .. 4/ f v //z 62 2 INVENTORS LOUIS N.D. WILLIAMS HARRY SWINGLEHURST JR.

?y their attorneys Nov. 18, 19.30. L. N. ,D. WILLIAMS ET AL 1,732,375

LOOP RETAINER AND MECHANISM THEREFOR I Filed Sept. 11, 1928 s Sheets-Sheet s {03 jl E50 5 EL l INVENTORS T k T 1 LOUIS N.D.WILLIAMS HARRYSWINGLEHURSTJR. 4y Zizezr altar/12 9.9

Patented Nov. 18*1930 i i UNIT-EDIT STAT -ES PAT i a 3 if i OFFICE LOUIS N; :0. WILLIAMS, or oeoN'rz, rENNsYnvANIA; ANn HARRY swrNeLnnuns'r, m,

..-OFIBROOKLYN, YORK, ASSIGNORS TO SCOTT & WILLIAMS, INQORPORATEDgOF' NEW YORK, N. Y,,CO'RPORATIO1\T OF MASSACHUSETTS A a iioornETAI nn A D MECHA ISM THnnEroR Application filed September 11, 1928, Serial No. 305;206.

This'inventionrelates to looping machines which are used for uniting knittedfwebs, particularly the toe pockets of seamless stockings produced on circular knitting machines, and it is concerned especially with a retainer for holding the webs in place'during foldingofthe point carrier and with a mechanism for .manipulating such a retainer automatically.

i In apreferred typeof looping machine the webs to be united are placed on a diametrically divided ring, the loops being carried on a peripheral series of points on the two segments of" the ring. .The preferred type of'machine has provision for automatically lfolding one segment of the ring about a diametral axis to bring the points on that segment into register with the po ints on the stationary segment. The loops carried by the points of the folded segment are then stripped from. thosepoints by an automaticmechanism and are slipped onto the registering points of the other segment.

. This operation is sometimes spoken ofjas doubling the loops.

and the ring is rotatedto present the loops on the points of the other segment successferred is described and illustrated-in the Patent 1,715,400 granted on the application of Louis N. 'D. Williams", Serial Number 160,165; filed January 10, 1927. r

, It has been found in the use of such looping machines that there is a tendency on the part of the loops on and neartheend points .of each segment of the carrier rin'gto slip from their points during the folding of the one segment upon the other.

To obviate this difficulty, retainers have been employed. :These are inserted between tion.

the end points of the two segments. When thefabricis folded the yarn looped on the end points is engaged by the retainers and is held on the, end points. The retainers are then removed to permit the stripping operaitself;

The movable segment is then swung back to its original position Theretainers known before this time have been manipulated byhand thus "addingfto the. total time required for eachloop ing v operation, Furthermore, the design offtlie retainers themselves has notbeen altogether satisfactory. A manually operated retainer is shown in the patent to Butz 1,068,853.

The present invention relates in particular to the retention of the fabric upon the points of a foldable point carrier during the folding thereof preparatory for-the looping operation, to an iniprovedretainer and to. an automatic mechanism for moving retainers into and out oftheir functioning positions at the looping machine. r l

The objects of the invention are (1) To improve'the design of the retainer proper time in thecycle of operations of the (2) To provide an automatic mechanism 7 for moving the retainers to and from their the cycle of operation of the looper;

(3) To relatethe operations of the retainer i to those of the looping machine in such a way that the total time required for the cycle of operation of the looping machine will not be increased by reason of the use of retainersg (4) To provide an automatic retainermanipulating mechanism which conveniently built; 7. V y

' (5)1 To provide an automatic retainer manipl'ating mechanism of simple construe tion, reliable in its functioning. i

may be applied to a looping machine already The invention is described hereinafter and shown in the accompanying drawings as applied to the looping machlne which s shown in the Patent 1,715,400 of Louis N. D; Wi1- liams, mentioned above. It is understood that while the invention is so described it is not limited in its applicability to that-iparticular looper but that it iscapable of. use with .other types of such machines.

In the drawings.

Figure 1 1s a top plan view ofa looping Figure 2 is a similar view of the same, showing the position of the parts during the stripping operation;

Figure 3 is an elevational view of the same machine with the certain parts removed, the view being taken from the direction at right angles to that of Figure 1;

Figure 1 is a view in side elevation showing details of the mechanism for moving the retainer arms.

Figure 5 is a view taken on the line 5-5 of Figure 1 showing the mechanism for removing the retainers during the stripping operation;

Figure 6 is a detail plan view showing the relation of a retainer lo the points of the ring before the ring is folded;

Figures 7, 8 and 9 are elcvational views taken on the line 66 of Figure 6 showing an end point of the stationary segment and a retainer in functioning position to illustrate the manner in which the loops on the end points are retained thereon .as the ring is folded; I

Figures 10, 11 and 12 are elevational views looking toward the ring from the outside along the axis of folding showing the relation of the fabric, points and retainer before, during and at the completion of the folding.

The bed plate 15 of the looping machine is centrally apertured to receive a cylindrical carrier 16 upon which the transfer ring R is supported in such a way as to be rotated with the carrier by a ratchet mechanism, not shown. This ratchet mechanism is shown in U. S. patent to .Villiams 1,315,064.

The transfer ring R, so called because it is used to transfer the fabric from the knitting machine to the looping machine, consis s of two segments 17, 18. Each segment carries a number of upstanding quills or points P extending circumferentially around its periphery, the number and spacing of the points being the same on each segment. The segment 18 is held stationary with respect to the carrier 16 while the segment 17' may be swung upwardly about a diametral axis by reason of the hinges 19, 20. When swung through 180 the segment 17 rests over the segment 18 with the points P of the two segments in vertical alignment. In some machines, the points overlap slightly. For the present purpose, the expression in register or the like is used to describe generically the relation of one set of points to the other set when the segments are brought together to permit a transfer or doubling of the loops on one to the other.

The sequence of operations of the machine is determined by a cam drum C having a number of inter-related cam rings. On its top is a plate cam 21 with lugs 22, 23. C0- operating with this plate cam is an arm 2% having pallet-like projections 25 engaging the plate camand .a pin 26 which takes into a slot in a horizontally rocking lever 27. Lever 27 has a finger 28 adapted to enter an opening in the segment 17 of ring R. hen the plate cam 21 is in the position shown in Figure 1, the lug 22 rocks arm 24 to aposition which causes lever 27 to be swung toward the ring B so that the linger 28 enters the opening therein.

Lever 27 is adapted to be swung in a vertical are by means of an arm 29 secured thereto and also to a short shaft 30. The shaft 30 is mounted in a fixed bearing 31 on the frame of the machine and has at its outer end a pinion 32 which is in mesh with a "egmental gear 33 on the end of an arm (Fig. 3) roclrable in a vertical plane. A pin on arm 8st and eccentric of its rocking axis en gages in a cam groove 36 in the side face of the cam drum C and imparts to arm 34 a rocking movement when moved by the sloping portion 37 of groove 36.

The cam lug and the portion 157 of groove 86 are so related angularly that immediately after the action of lug 22 in causing finger 28 to engage segment 17, the portion 37 comes opposite pin and rocks arm 3 whereupon the arms 29 and 27 are swung upwardly folding segment 17 over upon seg ment 18 as shown in Fig. 2.

Following the folding of the segment 17 to bring the points on it into register with the points on segment 18, the stripping mechanism is brought into )lay. Yi ithin the ments of the ring R are axially movable segments 9O peripherally notched to provide fingers between the points P. lVhen they are moved toward the tips of the points the fingers and the inner end of the notches engage the loops and strip them from the points. The doubling of the loops is accomplished by moving the stripper 90 within segment 17 downward toward the tips of the points when the segment 17 is in the position shown in Fig. 2. By this, the loops on the segment 17 points are slipped or doubled onto the registering points on the segment 18.

The mechanism for moving the stripper of segment 17 consists of a hooked lever 4:0 pivoted on a bracket on the machine frame and rocked by compound levers 1-1, 4:2 which derive their motion respectively from that of pins 18, a l: which engage grooves 45, 48 in the cam drum C. The sloping portions of these grooves are so disposed singularly with respect to portion 37 of groove 36 that the stripper-engaging member or actuator 47 is moved downwardly to meet the stripper on segment 17 as soon as the latter has been folded onto segment 18.

' The loop retainers and the automatic mechanism for moving into position between the end points on segments 17 and 18 will now be described.

The retainers 50 and 51 are formed as angle pieces secured by removable screws to 'rest a'sin Figs. 1 and-4, theextension 60 islea per.

mama" I separate arms 52and 53 which are arcuate inf shapeand are pivoted ona rod 54: whichis mounted in {spacedofi'sets onthe brackets 55 upon whiohthe hookedlle'ver 4O issupported. Thearms 52 and 53 areadapted for movement axially along the" rod 54 aswell as for swinging about it. Springs 56 secured at one end to a fixedqpart 57 of the machine frame tend to hold'the arms downwardi'asin Fig. 1 where the arms, 52, 53 arein a hori-' ZOIltfiJl plane thus putting theretainers in position between the end points of the seg- 'ments. Other springs 56 between the offset portions of the bracket 55 and thepivotpon tions of arms 52, 53 and surrounding the rod '54 urge the arms toward each other and toward the mid porti'on of 'rod'bt.

Suspended from the hooked lever 40 which carries the stripper actuatord'i, is amernber 58 having a wedge shaped portion 59 and a narrower extension 60. (See 'Fi 'ure- WVhen the hooked lever is, in ,its positionof between arms 52,53 and serves to spacethem the proper extent to put the retainers in cor rect position radially with respect to the points, andalsoit provides an entrance for the wedge-portion 59 Y When the hooked lever moves toward strip ping position the w-edge portion separates the retainers is necessary since, after folding,

the retainers lie close to the end points (see Fig. 12) andwould interfere with the last partof the downward movement of the strip- VVhen stripping is complete, the hooked lever is restored to its upper or rest position by the cam grooves 45,46 and, in doing so,-the

wedge-shaped portion59 is lifted and arms 52 and 53 return to their central position as in i Fig. 5 under effort of spring 56' putting the retainers again in position between the points.

Since the presence of'the retainers between the points has no function after the, foldin g is completed, and since-it would. interfere with the subsequentrotation of the Carrier 16 and ring R in presenting the doubled loops to the sewing apparatus, mechanism is provided to lift the retainers away from the ring as soon as the latter is unfolded and restored to the position shown in Figure l lhe un foldin occurs immediatelv'after the stri b v V ping when cam drum 0 presents to the pin 35 the up wardly sloping portion (not shown) of groove 36, It may also he noted at this point that whensegment l7 isrestored to the posi-v tion shown in Fig, 1, oam lug 23,properlyf rock thelink 66 toward the cam drum. "precise location of pin 71 may be determined by a consideration of the, fact that the arms arm 2dto disengage finger 28 fromlthe opening in ring R.- a p V wThe mechanlsm for puttlng the arms 52,

53 in raised position and for moving them from thatposition to their functioning position betweentlie endpoints just prior to positioned onplate21 for this purpose, rocks folding "of ring R, will now be described,

ends of arms 52, 58 near rod 54: and ismount ed by an off-set; to swing about anextension of rod 5d projectingbeyond bracket 55 An upright rod 62 having anangled or inclined piece 62 connects this bar 61, at a point ec centricof its axis on rod 54:, witha member 63 securcdto a so-called starting lever :64 and transverse thereof. The startlng lever 64 is pivotedon a fixed-part of the frame.

A pair of jointedjhorizontal links 65, 66

connect lever 64 with the cam drum C, link A har'6l extends transverselybeneath the 65 heing secured to lever 64:, and link'66 be pivoted at 67,011 a of frame,

not shown.

On the cam drum andinthe same horizon?- tal plane as link '66 isa lug. 68; This lug is so positioned on the drumthat it engagesjlink 66 and swings its engagmgend outward'from the drum at the same time that lug 22*is swinging arms 24: and 27 to putfinger 28 in engagement with segment 17',p'r'eparatory for folding of the ring;

- The outward movement of the engaging, endof link 66 swings the link 65 and thereby:

tilts the starting lever 64 in adirection causing a downward movement of the rod The result is that bar6l is dropped sufficiently to permit the arms 52, 53 to: swing downward under the influence of springs 56 putting the retainers in functioning positionas in Fig urel.

shown) to lie tangent to the cam drum just above lug 68 and has aportion 70 bent away from the drum to drop into engagement with i the link 66 after the lug68 has been rotated suiiiciently to clear the end of the link. The

latch therefore holdsthe link 66 away and through thelinkage described above,it keeps bar 61in its lower position." 1

VJ hen the ringis unfolded after the strip; ping operation, a pin 71, properly positioned on the cam-drum to come into the region of latch 69 at about the time that lug 23 is moving finger 28 out of the opening in segment 17, rides under latch 69 and lifts it awayfrom link 66 permitting the link end to movetowardthedrum. V Throughthe linkage 6662, the'movement of the link 66 causes'the bar 61 to be raised, carrying with it the retainer farms 52, 53, this movementbeing caused by reason of the fact that the lever 6d. is spring stressed 1n a direction such that ittends to The ion

p i "165 'A latch 691s pivoted on the frame (not 1 52, 53 may be raised as soon as the segment 17 has been swung toward unfolded position sufliciently to provide a clear space between the end points of the segments for the passage upward of the retainers.

It is to be noted that at the forward end of lug 68 is a small cam or lug 72. This corresponds to the starting pin 87 in the Vil liams Patent 1,715,400. Upon the initial movement of the cam drum in a cycle of operations, the starting lug 72 moves link 66 a slight amount causing lever 64 to rock slightly to the left as viewed in Fig. 3. This moves pin 73 on lever 64 from beneath the corner 74 of the edge of carrier 16 permitting the carrier to drop in order to put ring R in position with respect to the sewing mechanism. It is noted that the carrier edge 75 is inclined upwardly from the corner 74.

During the last part of the rotation of the cylinder, while the segment 17 is being rapidly stepped past the sewing mechanism, this edge 75 rides on pin 7 3 and thereby the carrier is restored to upper position to make easy the removal of ring B. This is all de scribed in the Williams Patent 1,715,400.

The retainer 50 (Sheet 5), (and, of course, retainer 51 also) has a part extending between the end points of the parts of the foldable point carrier R. This part comprises a throat 502 which is at the level of the tips of the points to permit the end point P to swing about into registry with point P, and a portion 503 extending above and below the level of the tips on the fabric side of the points. This portion 503 recedes on its forward edge 504 from the upper edge and may be curved although many variations of the curvature are possible as will be apparent when its purpose is understood. A strictly vertical forward edge is possible but is not preferred.

It is the portion 503 with the edge 504 which acts on the yarn to keep the end loop on the points. The action will be understood from a consideration of Figures 6 to 12.

These figures show the end points P and P at one juncture of the ring segments, the retainer 50 and one wale of the fabric. For convenient reference, the loop on point P is designated as 81 and the loop on point P as 82. The portion of yarn 83 between the end loops 81 and 82 does not appear in Fig. 7 but Figures 6 and 9 show it to be beneath the retainer portion 503.

Figure 8 shows the manner in which the yarn portion 83 rides up on the sloping edge 504 as the segment 17 with end point P is swung over onto segment 18. During the first part of the swinging of segment 17, the yarn portion 83 assumes a diagonal position across the edge 504 and partly folds over this edge. As it rides up the edge 504, this yarn portion is held away from the points laterally. Figure 8 is a view at the instant P" comes into register with P The end of yarn portion 83 toward loop 82 has come up from in back of the retainer end 503 (compare Fig. 6) and is lying along the edge 504. Immediately thereafter, as shown in Figure 9, the portion 83 slips over the upper tip of the retainer end 503 thus bringing all the fabric to one side of the retainer. The retention could be obtained without having the yarn portion 83 finally slip over the tip of the end portion 503 by having the tip higher. The yarn then would merely fold over the end portion 503 and would'be given a greater stretch. The tip shown is more satisfactory.

The action of theend 503 in preventing loops 81 and 82 from slipping from their points is perhaps best understoodby visualizing the changes from the Fig. 6 view. its P moves upward, yarn portion 83 must move to the left under the guidance of edge 504. As yarn portion 83 moves to the left, the yarn in loops 81 and 82, is drawn tightly against the points P and P. In addition to the frictional resistance thereby effected, the yarn is held out laterally from the points and away from the tips toward which it otherwise would be drawn. Other actions maybe present. This is not intended to be an exhaustive statement of the theory of i3.

operation.

Figure 2 shows the condition of the yarn portions when the folding is partly completed and further illustrates the positive action of the retainer end 503 in resisting the tendency of the yarn to be drawn off the points when they are separated abnormally during the swinging of segment 17 From Fig. 2 it is apparent that while preferably the throat 502 should be even with the tips of the points P, it could be slightly above without interfering with the swinging of point P" since there may be a slight clearance between the tips when folded. It could also be below the tip level, the only consideration being that if dropped too far the end 503 might be too low to retain the loop 82 on point P The important part of the retainer is the end 503. Experiment will readily show the distance it must extend above and below the level of the tips when in register to keep the loops on the points. This reference level, of course, is not a geometrical plane except possibly where the points meet tip to tip when folded. hen the tips overlap or when they do not meet when folded onto register with each other, the level will be between the planes of the tips.

As distinguished from former retainers which were simple points projected horizontally between the upright end points, the present retainer is characterized by the fact that it is thin and flat so that it may extend between the points and present a forward the Fig. 8 to the Fig.9 position.

edge 504 ofconsiderable extent in the direc; tion of ,theend points. Thisedgeholdsthe 7, portion of thread, between the loops impaled on the end points, laterally against the points and is suitably shaped to act as a cam orguide so that the thread may move along it and I still beheld laterally away from the points. In'thisway the loops are held from slipping off the points. The end 503 of the retainer may be variously made to provide such a forward edge due to its height than thickness.

The curve of edge. 504:,las shown, islpref considerably greater erablesince it gives a gradual displacement of yarn portion 88 during the folding. jThe curved top of end 503also permitseasy movement of the yarn over it in the change from The dotted outline'in Fig; 9 illustrates the withdrawal of the retainer radially to permit the stripper 90 to move downward to double theloops. Other directions of movement of the retainer arepossiblejustso it is moved outof the way of the stripper. f v The. description and. claims, here are phrased in terms of avertical arrangement of the points as that is the preferred and, in

. mental point carrier and a" loop retainer, adapted to extendtransversely of'said car-' fact, the only form of looper in actual use,

having a foldable carrier. It'willbeunderstood however that theinvention is not limited to use with vertically arranged points and that the claims'are not to "bereadas excludingother arrangements, suehwoi'ds as v v above l below,-upwardly and the like I be ng used i n' a relativesense. -We claim- 1. In a looping machine, afoldable segrier betweenthe endpoints of the carrier segments, saidretainerj comprising an end portion adapted to extend on thefabric side of the points above and below the level of the tips of the points. v

2. In a looping machine, a foldable segmental point carrier and a loop retainer adapted to extend transversely of said carrier between the end points of the carrier segments, said retainer comprising an end portion adapted to extend on the fabric side of the points above and below the'level of the tips of the points and having its forward edge receding from .theupper edge. 7 3. In a looping machine, a foldable segmental point carrier and. a loop retainer adapted to extend transversely of said carrier between the end points of the carrier segments, said retainer comprising an end por- I tion adapted to extend on the fabric side of the points above and below thelevel of the tipsv of the points and having its forward edge receding from the upper edge on a curved line.

4:. Ina looping machine, a foldable seg mental point carrier and a loop retainer adapted to extend transversely of-said carrierrbetween the end points of the carrier segments, said retainer comprising an end portion presenting; a :forward edge over which the thread portion between, the loops on'the end points extends during folding whereby tov draw the. said agalinstthe endpoints; f 5. In a looping machine, a foldable segmental pointcarrier and a loop retaineradaptedto extend betweenthe end points of m loops laterally 1 the carrier segments, said. retainer havingan end portion with a forward edge for engag -i ing the thread POIlLlOHbQtWGQIl the: loops on the end points and'guiding it laterally away from the points while the segments are being folded. e

6. A loop retainer for use with looping machine comprising a throat and an endpo'r- 7 tionadjacent said throat and extending upwardly therefrom. I

7 A loop retainer foruse with machine comprising a throat and an end por-' tion adjacent said throatand extending .up-

wardly therefrom, the forward edge of said-g i portionreceding from the upper edge thereof.

.8. A loop retainer for use with a, looping machine comp-rising a throat and an end portion adjacent said throat and extending up wardly therefrom, the forward edge of said portion receding from the upper edge thereofon a curved line. I

is a point carrier foldable to bring the points 9..A loop. retainer, for use with a looping machine, comprisingv an endportion that s g of the parts thereof into register to permit doubling of the loopsby a-strippe'r mechaq nismautomatically movable to stripping position when said carrier is folded, aloop re- 'tainer and means for automatically putting theretainer in position to hold the fabric on the carrier points during folding.

12. In a looping machine in which there is a point carrier foldable to bring the points of the parts thereof into register to permit doubling of the loops by a stripper inechanism automaticallymovable to stripping position when said carrier is folded, a loop retamer and means for automatically puttlng the retainer in. position to hold the fabric on the carrier points during folding, and means for automatically moving said retainer from said position for the stripping operation.

13. In a looping machine in which there is a point carrier foldable to bring the points 7 tion When said carrier is folded, a loop retainer and means for automatically putting the retainer in position to hold the fabric on the carrier points during folding, and means operable by the movement of the stripper mechanism toward stripping position for moving said retainer from its functioning position and for holding it therefrom during the stripping operation.

14. In a looping machine in which there is a point carrier foldable to bring the points of the parts thereof into register to permit doubling of the loops by a stripper mechanism automatically movable to stripping position when said carrier is folded, loop re tainers for hold'ng the fabric on the carrier points during folding and an arm for each retainer, said arms normally holding said retainers away from said carrier but being swingable to put the retainers in position between the end points of the carrier parts and laterally movable to remove the retainers from said position during stripping.

15. In a looping machine in which there is a point carrier foldable to bring the points of the parts thereof into register to permit doubling of the loops by a stripper mechanism automatically movable to stripping position when said carrier is folded, loop retainers for holding the fabric on the carrier points during folding and an arm for each retainer. said arms being pivoted and laterally movable along their pivots, in combination with means for swinging said arms and a wedge between said arms and moved by said stripping mechanism to separate said arms.

16. In a looping machine in which there is a point carrier foldable to bring the points of the parts thereof into register to permit doubling of the loops by a stripper mechanism automatically movable to stripping position when said carrier is folded, loop retainers for holding the fabric on the carrier points during folding and an arm for each retainer, said arms normally holding said retainers away from said carrier but being swingable to put the retainers in position between the end points of the carrier parts and laterally movable to remove the retainers from said position during stripping, in combination with means for swinging said arms and a means associated with said stripper mechanism for controlling the lateral movement of said arms.

17. In a looping machine, a foldable point carrier and mechanism for folding it, a stripper mechanism, loop retainers and mecha nism for putting said retainers in functionlng position with respect to said carrier, in-

terrelated cam means for controlling the operations ofsaid mechanisms in predetermined sequence and means controlled by said stripper mechanism for removing said retainers from said functioning position during the stripping operation.

18. In combination in a looping machine, a point carrier foldable to bring the points of one part thereof into register with the points of the other part, retainers for holding the fabric loops on the end points of said parts during folding, means for moving said retainers to functioning position with respec to said end points prior to folding of said point carrier and for moving them away from said position upon unfolding of said carrier, a stripper mechanism for doubling the loops on one part of said carrier onto the other part thereof while said carrier is folded, and means operable by the movement of the stripper mechanism toward and away from its operative position for causing said retainers to move respectively out of and into their functioning position. 7

19. In a loopin machine. a foldable point carrier-and mecha nism for folding it, a stripper niechanis loop retainers and mcchanism for manipulating them, a cam drum for controlling the operations of said mechanisms in predetermined sequence, and a latch, said retainer manipulating mechanism conr prising a lever engaging the cam drum. and said cam drum comprising a cam for moving said lever into engagement with sai: EUIll to cause said retainers to move to and to be held in functioning position with respcr; to the point carrier, and a second cam for re leasing said lever from said latch.

In testimony whereof we have signed our names to this specification.

LOUIS N. D. lVILLIAMS. HARRY SWINGLEI-IURST, JR.

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