US2388557A - Means for winding textile packages - Google Patents

Description

Nov. 6, 1945. R. LITTLE ET AL 2,383,557

MEANS FOR WINDING TEXTILE PACKAGES v v 1 Filed Sept. 21, 1945 2 Sheets-Sheet 1 v /fl'ozugys.

NOV. 6, 1945. I ET AL 2,388,557

MEANS FOR WINDING TEXTILE PACKAGES Filed Sept. 21, 1943 2 Sheets-Sheet 2 J 3 f M 2.9 a? qiv I i v a r "?4 j y" g I 6 A; 69 g Patented Nov. 6, 1945 Royal Little, Provldenc ston, B. I., assignors This invention relates to up-twisters, winders, redraws and-other textile machines and consists in improved means for producing a more stable package from the yarn supplied to the machine.

A particular object of the invention is to provide a means for winding yarn at a high rate of speed on up-twisters and like machines to pro e, and Leroy Jehu, Cranto Textron Incorporated, a corporation of Rhode Island Application September 21, 1943, Serial No. 503,21 l Claims. ((1242-43) vide a package having layers of cross-wound coils of uniform angularity throughout the main portion of each traverse, but with a sharper angle of inclination at the ends of the traverse to pro--' vide abrupt returnbends where the coils reverse at the ends of the package.

Anotherobject of the invention is to provide in the machines of the types specified means for distributing the yarn with a substantially uniform traverse throughout the greater portion of the length of the package to compact a maximum amount therein and for imparting a rapid increment of motion to the traversing means at the ends of each traverse to deposit the yarn in sharp return-bends at theiends of the package. Another object of the invention is to provide means for traversing yarn on a package to deposit it in layers of crossing coils with the turns or coils of each traverse having a uniform angularity with respect to the axis of,the package while at the ends of each traverse an added increment or rapid throw is imparted to the yarn in reversing its direction of traverse whereof to produce sharp "knuckles" or bends at the ends of the package.

means for actuating said cam intermittently to impart an increment of motion to the threadguide at a rapid rate at each end of thenormal traverse of the guide.

Another object of the invention is to provide an improved traverse-mechanism comprising a rotary cam of generally helical formation with means actuated therefrom for imparting a normally uniform rate of traverse to a thread-guide connected therewith and auxiliary means for intermittently shifting the cam axially, first in one direction and then in the opposite direction,

Another object of the invention is to provide a means for winding a yarn package composed of layers of crossing calls with the reverse bends in the coils at theends of the package so related as to prevent the yarn from overrunning to form "stitches or c'obwebs" on the flat faces of the package and to further provide against thecoils or turns of yarn from sloughing or shelling.off

over the ends of the finished packaged Another object of the invention is to provide"- in a machine of the type indicated an improved traverse-mechanism comprising a main traversecam for imparting a normally uniform traverse to the thread-guideor other means for distributing the yarn on the package with means for im-.

parting a rapid increment of motion to the threadguide or yarn-traversing means at each end of its traverse.

Another object of the invention is to provide an improved traversing mechanism for up-twisters and other machines of the present type having a rotary traverse-cam for imparting a normally uniform traverse to the thread-guide with drawings.

Further objects of the invention are set forth in the following specification present improved method of taining package and a preferred embodiment of which describes the winding 8. self-sus- ,mechanism for practicing the method, by way of example, as illustrated by the accompanying In the drawings:

Fig. 1 is a part-sectional elevational view of-a portion of an up-twisting machine showing the essential parts of the winding mechanism with the traversing thread-guide in position at one end of the package;

Fig. 2 is a similar view of the essential parts of the traversing means showing the threadguide in position at the opposite 'endof the package;

Fig. 3 is a fragmentary end view showing the arrangement of the traverse-lever and the connections betweenone arm of the lever and the traverse-bar which carries the thread-guide;

- Fig. 4 is a sectional view on line 4-4 of Fig.1 showing the main cam and its connection with the traverse-lever and also illustrating the auxiliary cam for imparting a rapid increment of moits travdiagrammatic view inthe manner in which the coils of winding are deposited on the cylindrical core or yamreceiver; and

Fig. 6 is an enlarged perspective view of the auxiliary cam.

The present invention has for its general object used as a supply for knitting or braiding machines and other textile apparatus.

In accordance with the present invention the yarn may be wound on either a cylindrical or conical core with the crossing coils forming layers which build up in a mass having relatively fiat or tapered ends. The present improvement consists in so depositing the turns or coils of yarn on the package as to distribute them with a substantially uniform traverse throughout the greater portion of the length of the package, that is with the turns having substantially the same angle of layin each traverse, while accelerating the rate of traverse at the ends thereof to cause the yarn to make sharp bends as it reverses its traverse at opposite ends of the package. By thus forming the layers of winding with the coils reversed in substantially V-shaped, sharp bends or fknuckles the yarn is prevented from slipping or sliding over the edges of the package during the winding or from sloughing or shelling oil in loose coils when the package is stood on itsend for storage or during use as a supply for delivering the material to other processes.

To accomplish this method of winding we propose to effect a rapid increment of movement between the thread-guide and package in the direction of the axis of the latter at each end of traverse of the yarn. Conveniently, we may provide means for imparting this quick throw or rapid increment of motion to the thread-guide, or in other cases to the package-support itself, such means comprising, for example, a main rotary traverse-cam having a helical formation combined with a supplementary cam arranged to shift the main camlongitudinallyof its axis intermittently twice in each revolution thereof or at points where it reverses the traverse, that is, at the opposite ends of its throw. For this purpose we may employ an auxiliary or supplemental cam connected to and rotatable with the main traverse-cam and having high and low points for engagement with a fixed abutment to cause the axial displacement of the main cam, first in one direction and then in the opposite direction.

We are aware that it is old and well known in the art to provide in combination with a main traverse-cam, an auxiliary cam for shifting the main cam axially first in one direction and then in the opposite direction during its rotation. However, in all of these previously proposed constructions the auxiliary cam, or in some instances an eccentric, acts to maintain a continuous shifting movement of the main traverse-cam, the purpose being to cause a progressive change in the relative positions of the layers of winding, in certain cases to produce packages with sharply tapered ends. The purpose of the present constructicn is therefore quite different and, we believe, entirely novel in that the auxiliary cam acts intermittently to shift the main traverse-cam only at predetermined intervals to impart a rapid increment of motion to the thread-guide or other traversing means at the ends of its traverse. This novel method of actuating the traverse-cam provides for the improved method of winding set forth above which results in producing a more stable package without overruns or stitches at its ends. thereby adapting it to deliver its yarn more freely with 'a uniform tension and with the coils or turns of yarn prevented from sloughing or shelling ofl over the ends of the package when it is handled or put to use as a supply.

One example of mechanism for carrying out the present improved method of winding is illustrated in Fig. l of the present drawings which shows the improved traversing means as applied to use in an vup-twister of conventional type. The twisting machine usually comprises end frames 2, only one being shown in Fig. l, which are connected by horizontal struts or rails 3. Journaled in a suitable bearing 4 in each framemember 2 is a horizontal shaft 5 which may extend the entire length of the machine for supporting a plurality of driving drums or cylindrical rolls 6, one for each twister unit. The shaft [5 may be driven from an electric motor or other source of power, not herein shown, and beyond its bearing 4 it carries a helical gear 8 fast therewith and arranged to drive the traverse-mechanism of the machine, to be described later.

Supported in brackets ill on the frame-memhers 2, and usually mounted in similar supports at intervals along the length of the machine,

is a horizontal bar H, to which are fastened brackets l2 formed with vertical slots it for receiving the opposite ends of spindles it for mounting suitable cores or tubes C on which the packages are wound. Each core or tube-C is usually secured rotatably with its spindle I5 by means of a suitable expansible mandrel or copholder, not herein shown, and the ends of the spindle are adapted to slide upwardly in the slots 83 in the brackets l2 as the package is built up on the core or tube C. At the start of windin a package the periphery of the core or tube C rests on the circumference of the driving drum or roll 6 to be rotated therefrom in the usual manner as well known to those versed in the art. Located below each driving drum 6 is a vertical twister-spindle 20 for mounting a spool S of yarn y as a supply for twisting and winding it into a commercial package, the spindle 20 being Journaled in suitable bearings carried on a horizontal rail, not illustrated. The spindle 20 carries a pulley or whorl 2| which contacts with and is driven from an endless belt 22 extending throughout the length of the machine. The belt 22 passes around an idler pulley 23 journaled on a vertical stud 24 mounted in a bracket 25 attached to the frame-member 2 and may be driven from a similar pulley rotated from the drive of the machine at the opposite end thereof. As the twister-spindle 29 is rotated from the belt 22 the yarn is delivered from the spool S and the twist imparted thereto as it feeds through an eye or pigtail 21 on the rail 3 and thence to the package P being wound on the core or tube C.

tened to a horizontal traverse-bar 85, the thread-.

7 guide thus being mounted on the traverse-bar to adapt its eye to bear against the winding yarn and to rock away from the cop-tube C as the winding builds up thereon. The horizontal traverse-bar 85 is adapted for longitudinal reciprocation, being usually mounted to slide in slotted brackets, not herein shown, positioned at intervals along the side of the machine.

As in a usual form of construction, the tra'verse-bar 85 is adapted to be reciprocated from a rotary traverse-cam 48 of helical contour. The traverse-cam 48 has its hub mounted fast on a vertical shaft 4| which is iournaled at its opposite ends and adapted to slide axially in bearings 42 and 48 carried by a U-shaped frame 45 bolted to the side of the frame-member 2 of the machine. The circular rim of the cam 48'is provided with a helical groove 48 in its periphery and the cam may be held fast with the shaft 4| by any suitable means such as the set-screw 48 in its hub, see Fig. 1. The upper end of the hub 41 of the cam 48 is reduced in diameter to receive the hub of a spur-gear 58 secured fast therewith by means of a set-screw 48. The gear 58 meshes with a pinion-gear 52 keyed to a vertical shaft 85 which is journaled in a bearing 58 formed as a part of the U-shaped frame 45; the pinion 52 being held fast on the lower end of the shaft 55 by suitable means such as the set-screw 51. Mounted fast on the upper projecting end of the shaft 55 is a helical gear 88 in mesh with the helical gear 8, previously described as being carried at the end of the drum-shaft 5. Through this arrangement the drum-shaft 5 is connected to drive the vertical shaft 55 to rotate the cam 48 by means of the gears 58 and 52.

On the side of the frame 45 is a bearing boss 82 in which is pivotally supported a rocker-shaft 88 carrying a bell-crank lever 85. The bell-crank lever 85 is held fast on the rocker-shaft 88 by means of set-screws 84 and has one arm 88 reaching across the periphery of the cam 48. A bowl or roller 81 is rotatably mounted on the end of the arm 88 for engagement with the helical groove 48 in the cam 48, whereby the rotation of the cam will rock the bell-crank. The ope posite long arm 88 of the bell-crank lever 85 extends upwardly and is formed with a longitudinal slot 88 to adapt it for connection with the traverse-bar 85. As herein illustrated, a stud 18 engages through the slot 88 and is adjustable lengthwise thereof by means of a nut 1| screwed onto its reduced end. The opposite reduced end of the stud 18 is pivotally mounted in an arm 18 which carries a vertical rod I4. The rod 14 is slidable through a bore in a block-like member 15 fastened to the end of the traverse-rod 85. The rod 14 may be held fast in the end member 15 by means of a set-screw 18 after the stud 18 has been adjusted lengthwise of the slot 88.

As thus far described the traverse-mechanism is similar to that used in machines of like type. During rotation of the cam 48 the bell-crank 85 is rocked therefrom by the engagement of the bowl 81 in the cam-groove Y48 and the traverserod 85 is reciprocated from the bell-crank through the connections last described. The length of traverse of the thread-guide 88 carried by the traverse-bar 85 may be regulated by adjusting the stud l8 lengthwise of the slot 88 to give the proper extent of throw to the guide in accordance with the length of package to be wound. Where the machine is arranged with the twister units in duplicate on its opp site sides a single traverse-mechanism is employed for actuating the two oppositely-disposed traverse-bars. For this purpose a second lever I8, see Fig. 3, is fastened to the rocker-shaft 88 and connected to the opposite traverse-bar by the same arrangement and in alinement with the upper arm 88 of the bell-crank lever 85, it being understood that the lever I8 comprises a single arm not connected to the traverse-cam 48. By this arrangement the two traverse-bars on opposite sides of the machine are reciprocated in unison with the termini of their strokes coinciding.

In accordance with the present form of construction of the invention the main traversecam 48 is actuated intermittently to shift it in the direction of its axis by means of a supplemental or auxiliary cam 88', shown in detail in Fig. 6. The cam 88 may be in the form of a disk bored .axially to receive the shaft 4| and secured fast to the lower. end of the hub 4|\of the cam 48 by means of screws 88 having their heads received in countersunk recesses in the bottom face of the cam. The cam 88 is thus mounted to rotate with the main cam 48. The lower face of the cam 88 is formed at one side with an angular projection or lobe 8| and diametrically opposite I thereto is a corresponding angular recess 82, see

Fig. 6. The fiat lower face of the cam 88 is adapted to rest on a fixed abutment 88 supported from the bracket 45, see Fig. 1, and during the .rotation of the cam the lobe 8| and recess 82 engage alternately with the abutmen 88. As

shown more particularly in Fig. 4, the a utment 88 may take the form of a roller rotatably mounted on the pointed ends of studs 88 secured in the arms of a bifurcated'bearing bracket 88. The bracket 88 has a depending stem 88 screwed through a hole in the bottom wall of a box-like oil-pan 82 supported on the lower arm of the bracket 45, the pan thus serving as an oil resermin for lubricating the engaging parts of the traversing mechanism. A nut 84 screwed onto the lower end of the stem 88 of the bracket 88 is employed for fastening the bracket fixedly in position while allowing for its adJustment when released to raise or lower the position of the roller 88 by turning the stem of the bracket in its threaded hole in the bottom of the pin.

A helical spring 85 is coiled about the shaft 4| with its lower end engaging against the end bracket 45. The spring 85 acts against the hub of the cam 48 tending to force its assembly withthe cam 88 downwardly as the depression 82 comes into register with the roller 88, while resisting the upward motion of the cam when the projection or lobe 8| of the cam 88 rides over the roller. By reference to Fig. 1 it will be noted that the projecting lobe 8| on the auxiliary cam 88 is located in alinement with the upward terminal point of the groove 48 in the cam 48, whereas the low point or recess 82 in the cam is located in alinement with the opposite terminal point of the cam-groove 48 in the cam 48. Through this arrangement the cam-lobe 8| is caused to act to.

thread-guide 88 toward the left, as viewed in Fig. 1, as the guide reaches the left-hand end of its normal stroke. As the high point on the cam rides across the roller 88 the cam-assembly is immediately forced downwardly by the action of the spring 95 to impart a quick reversal of movement to the thread-guide 8b. The same action occurs at the opposite end of the stroke of the thread-guide 30, that is. the guide is carried toward the right as viewed in Fig. 1 with a quick motion as the cam-assembly is shifted downwardly under the action of the spring 95 with the roller 88 riding into the depression 82 in the face of the cam 30, see Fig. 2, the guide being immediately moved back in the opposite direction, or inwardly as regards the end of the package P, during the continued turning of the cam 80 as the roller 88 rides out of the depression 82 and lifts the cam 40. By the means last described the main traverse-cam 68 is displaced axially in opposite directions as the roller tl reaches. the extreme ends of the throw of the main cam and thereby the bell-crank lever 65 is rocked to give a rapid increment of motion to the traverse-bar and thread-guide 30. Stated another way, the thread-guide 30 is moved outwardly and inwardly with respect to the termini of its reciprocations by the cam 40, thereby preventing any dwell which would tend to cause the yarn to be laid in an extended bight or relatively long loop at the ends of the package.

The method of operation of the complete machine is explained as follows: The up-twisting machine shown herein is prepared for operation by placing a spool of yarn S on the twister-spindle 20 and leading the strand 3 therefrom upwardly through the fixed pigtail-guide 2i, thence through the eye of the guide 30 and attaching its end to the core or cop-tube C on which the package is to be wound. The cop-tube C is mounted on its holder carried by the spindle l5 and caused to bear against the surface of the drum 8 which is rotated from the driving means of the machine. Consequently the tube C will be rotated by the drum to wind the yarn on its surface. ,During the rotation of the drum 6 the shaft 5 operates through the gears 8 and 60 to drive the vertical shaft 55 and the latter, operating through the gears 52 and 50, rotates the main traverse-cam 30. The traverse-cam 40 acting through the roller 6! oscillates the bell-crank lever 85 to reciprocate the traverse-bar 36. The thread-guide 30 mounted on the traverse-bar 35 thus is caused to traverse back and forth axially of the cop-tube C to distribute the yarn 1/ thereon in helical or spiral coils having a substantially uniform inclination or angle of lay during each traverse. As the thread-guide 30 reaches the end of its normal stroke under the action of the cam 50 it is given an increment of motion at an accelerated rate by the action of the auxiliary cam 80 as it shifts the cam 40 vertically upward and downward. It has been noted that the cam 80 is secured fast to the hub of the cam 40,

or it may be constructed integral therewith, and therefore it is rotated synchronously with the rotation of the main cam. As the cam 40 turns to the position shown in Fig. 1 its groove 46 will carry the roller 61 to the upper end of the throw of the cam and as the roller approaches this point in its motion the cam 40 is raised or lifted by the action of the lobe 8| on the auxiliary cam 80 riding over the fixed abutment or roller Q8. The cam lll is thus caused to rock the bell-crank 65 beyond its normal range of oscillation, that is with a rapid increment of movement to extend the'strok'e of the traverse-bar 35 slightly and thereby the traverse of the thread-guide It. This raising or lifting of the cam t0 occurs momentarily at a rapid rate to accelerate the rate of movement of the thread-guide 30 and the cam is then lowered quickly to reverse the traverse of the guide at the samerapid rate. The result is that the yarn is carried rapidly outward and then inward with respect to the end of the package to form a sharp bend or knuckle where the coil reverses to wind back in the opposite direction. Stated another way, the yarn is laid on the tube C at a sharper angle of inclination to the axis of revolution of the latter as represented more or less schematically at am Fig. 5 of the drawings.

The yarn y is shown in Fig. 5 as coiled about the tube C in two. helical turns making what is termed a two-wind," being represented by full lines at the left as having a normal inclination to the axis of the tube plus a sharper inclination at the end of the traverse where it reverses in a V-shaped bend or knuckle designated a. At the opposite end of the tube C the same phenomenon occurs where the yarn reverses its traverse in a sharp bend, indicated at b, and winds back in the opposite direction, or toward the left as viewed in Fig. 5. This latter change in the characteristics of the wind is caused by the rapid lowering and raising of the cam 40 as the recess 82 in the cam 80 rides across the abutment 88 as indicated in Fig. 2 ofthe drawings. In other words, a rapid increment of movement is given to the thread-guide 30 by the axial downward and upward shifting of the cam 40 which augments the rocking motion of the bell-crank lever 65 at an accelerated rate.

The winding continues in this manner to build up layers of crossing coils with the cop-tube C rising away from the driving drum 6 to accommodate the increase in diameter of the winding mass. As the yarn buildsup on the cop-tube C the package will be formed of true cylindrical shape with slightly beveled or rounded edges at its ends as represented in Figs. 1 and 2; that is without ridges or irregular portions on its surface. By winding the yarn uniformly in crossing coils throughout the greater portion of the length of the package the winding operation may be maintained at a high rate of speed and the package will contain a maximum amount of yarn within prescribed dimensional limits. On the other hand, the disposition of the yarn in sharp bends or knuckles at each end of the package results in tying the coils in place and preventing them from sliding or slipping over the edges of the package to be drawn down across its ends and cause stitches" or cobwebs," a defect in the winding well known to those versed in the art. Likewise, the quick outward throw and reversal of traverse of the yarn at the ends of the package prevent the coils from sloughing or shelling off when the package is handled, stored or stood on its end to deliver the yarn in various transfer processes, such as in a knitting or braiding machine. As another advantage, the present improved type of package results in reduction of waste as the yarn will not slough or shell off over the ends if the coils are loosened due to steaming or other treatment of the material in the wound package.

With the present method it is possible to wind main cam, a

winding spindle may beincreased. Stated another way, with the normal traverse speed the spindle speed may be increased to a considerable extent to reduce the time required for winding each package. Moreover, with the increase in the number of turns or wraps of yarn in each layer more yarn can be wound into a predetermined size, thus economizing required for storage or shipment.

The arrangement of the two traverse-levers 65 and 18 in alinement, see Fig. 3, and oscillated by the bell-crank 65 connected to the traverse-cam 40 provides for their operation in consonance, that is, with their strokes coinciding so that they can be actuated from a single traverse-mechanism with the auxiliary cam 80 effecting the increment of motion in the proper directions at the corresponding ends of the strokesv of the thread-guides on opposite sides of the machine.

It will thus be observed that the present invention provides an improved method of winding yarn into packages and a novel traversing means in the space package of the cam first in one direction and then in the opposite direction longitudinally of its axis to accelerate the action of the reciprocating means at each end of its stroke only and with all strokes of the guide of uniform length throughout the. winding.

4. An improved traversing means comprising a verticalshaft, a helical cam on said shaft adapted for rotary and axial movement, gearing for rotating'said cam, a secondary cam rotatable with the main cam, and a fixed abutment engagingthe secondary cam, said secondary cam having a contour cooperating with the abutment to alternately raise and lower the main cam during short intervals of its rotation at points only at the limits of throw of said-main cam.

for accomplishing this result. While the invention is herein shown as employing the improved traverse-mechanism for reciprocating the threadguide, it is obvious that it might be arranged to reciprocate the package itself and such a form of construction would fall within the scope of the appended claims. While the traverse-cam shifting means is herein shown in the form of afacecam 80, this element of the mechanism might be constructed as a grooved cam with the circumferential groove normal to the axis of. the cam throughout its greater extent, but provided with offset portions at Moreover, other means besides the auxiliary cam may be used to eflectthe intermittent shifting of the main traverse-cam at prescribed intervals during its rotation. Further modifications may be made in the structure and arrangement of the parts of the device without departing from the spirit or scope without limiting ourselves to the exact form of construction herein shown, we claim: r

1. An improved traversing means for winding machines comprising a helical cam adapted for axial movement, means for rotating said cam, yam-traversing means reciprocable by said cam, a secondary cam rotatable in synchrony with the diametrically opposite points."

of the invention and therefore stationary element engaging the secondary cam, means between said stationary element and said secondary cam to shift the main cam axially in one direction while adapting it to move alternately in the opposite direction during short intervals the limits of throw of said main cam.

2. In a machine of the type indicated, means for rotating a package, a thread-guide for traversing yarn on the package lengthwise thereof, a traverse-bar for reciprocating the thread-guide, a lever for reciprocating the traverse-bar, a helical cam for oscillating said lever. an auxiliary cam, and means for rotating said cams in synchronism, said auxiliary cam being shaped to effect axial displacement of the main cam first in one direction and then in the opposite direction solely at the end of each stroke of the traverse-bar.

3. In a machine of the type indicated, means for rotating a package, a thread-guide for distributing yarn on the package to wind it in crossing coils, means for effecting relative reciprocation between the thread-guide and package lengthwise of the latter, a lever for actuating said reciprocating means, a cam for oscillating the lever, and means for periodically displacing of its rotation at points only at 5. An' improved traverse-mechanism comprising a vertical shaft, a helical cam mounted on said shaft and adapted to slide longitudinally of its axis, means for rotating said cam, a threadguide reciprocated by. said cam, a disk-cam rotatable in synchronism with the main cam and having a V-shaped projection and a corresponding depression at diametrically-opposite points on its face, and an abutment engageable by the face of the latter c'am whereby to cause it to raise and lower the main cam during relatively short intervals occurring only at the ends of reciprocation of the thread-guide.

6. An improved traverse-mechanism compris ing a main cam having a helical formation, means helical traverse-cam mounted to rotate and slide axially of said shaft, a disk-cam connected to the helical cam to'slide and rotate therewith, said disk-cam having a single V-shaped projection and a single corresponding recess on its face disposed in diametrically opposite relationship, a fixed abutment engageable by the disk-cam, means to rotate the two cams inunison, and resilient means acting to slide the helical cam in one direction to maintain the face of the diskcam bearing against the abutment.

8. A traverse-mechanism for textile machines comprising two opposite parallel traverse-bars, a lever connected to reciprocate one of said bars, a second lever connected to reciprocate the other bar, means for, connecting said levers to oscillate in unison both in the same direction, a helical cam connected to reciprocate one of said levers, and means for-periodically displacing said cam in opposite directionslongitudinally of its axis at the terminal points only of the oscillating motion of the levers whereof to cause both traverse-bars reciprocated from the levers to reverse their reciprocation at corresponding points with a rapid increment of motion.

9. A traverse-mechanism comprising a main cam, a lever connected for oscillation by said cam,- a second lever arranged in parallel relation to the first lever and connected thereto for oscillation therewith, a pair of traverse-bars extending in opposite parallel relationship, means connecting each traverse-bar to one of the levers for reciproi5 amass? cation thereby, and an auxiliary cam for shifting the main cam axially first in one direction and then in the opposite direction during relatively short intervals occurring only at the terminal points in the oscillating strokes of the levers to cause both traverse-bars to be reciprocated in consonance with a rapid increment of motion at the corresponding ends of their reciprocations.

10. In a machine of the type indicated, means for rotating a package, a thread-guide for traversing. yarn on the package. means to mount the thread-guide to adapt it to bear against the package being wound and to recede therefrom with the growth in the winding, means for reciprocating the thread-guide axially of the package with a uniform lenkth of traverse from start to finish of the winding, and means for imparting a rapid acceleration to the reciprocation of the thread-guide for a relatively short interval at each terminus of its traverse as it moves both towardthe end of the package and away therefrom to dispose the terminal portions of the yarn coils in sharp V-shaped bends or knuckles wherelii) of to prevent said coils from sloughing or shelling ofi from the ends of the package.

ROYAL LITTLE. LEROY JEHU.

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