US1749355A

US1749355A - Traversing means for winding machines

Info

Publication number: US1749355A
Application number: US342544A
Authority: US
Inventors: Reece Franklin Augustus
Original assignee: Leesona Corp
Current assignee: Leesona Corp
Priority date: 1929-02-25
Filing date: 1929-02-25
Publication date: 1930-03-04
Anticipated expiration: 1947-03-04
Also published as: DE527468C; BE367328A; FR682728A; GB339679A

Description

March 4, 1930. F. A. REECE 1,749,355

TRAVERSING MEANS FOR WINDING MACHINES Filed Feb. 25, 1929 5 Sheets-Sheet l March 4, 1930. F. A. REECE 1,749,355

TRAVER SING MEANS FOR WINDING MACHINES Filed Feb. 25, 1929 5 sheets-Sheet 2 IT'W 5 March 4, 1930.

TRAVIERSING MEANS FOR WINDING MACHINES Filed e 1929' 5 Sheets-Sheet 3 F. A. REECE 1,749,355

March 4-, 1930. F. A. REEE 1,749,355

' THAVERSING MEANS FOR WINDING MACHINES Filed Feb. 25, 1929 '5 Sheets-Sheet 4 March 4, 1930. F.3A. REECE 1,749,355

* TRAVERS ING MEANS FOR'WINDiNG MACHINES Filed Feb. 25, 1929 5 Sheets-Sheet 5 Patented 4, 1930.

'UNlT-ED' STATES PATENT oerce f FRANKLIN nuevsrus Baron, or, GHESTNI'I'J. AHILL, massacnusn'rrs, nssmnon T umvnasnnwmnme COMPANY, or nosron, mnssacnosnrrs, n coaronarron or Y MASSACHUSETTS K TRAVEBSING MEANS FOR WINDING MACHINES Ap flication filed February 25, 1929. Serial Nb. 342,5M.

This invention relates to machines for winding yarn, thread, wire or similar strand 'materials into acop, cone, coil or package and has to do particularly with means for trav-- ersing the yarn lengthwise of the package to deposit it thereon in helical coils.

Winding machines for these purposes em- -ployed commerciall at the present time are usually provided with a reciprocating or oscillating thread-guide which is operated by a cam or other mechanical movement. In this type of machine the direction of movement of the thread-guide and of the parts which operate it must be reversed as each end of the yarn package .is reached; At high speeds the reversal of the direction of IHOVB'. ment of the thread-guide by the cam or other operating mechanism is so violent that it wracks and 'ars the machine and limits its speed. At he present time winding machines of this type cannot be run at speeds much, if any, above 500 yards a minute, and it has not been considered practical'to increase the speed of the machines.

It has also been proposed to employ asplit drum to traverse the yarn, but for any except short yarn package's it is necessary to employ a drum of large bulk and weight. Altogether, and as a result largely of the difficulties mentioned, it has been considered impossible to increase the speed of winding machines to any substantial extent.

-' My invention entirely eliminates theuse of ,cams, and oscillating elements and the,

mechanism for operating them, and does awaywith the shock, jar and. wear resulting@ from sudden reversals of movement.- The winding machine is much simpler, is less ex-. pensive t'o manufacture and has no reciproeating parts for traversing the yarn lengthwise-of the packa e. As a result of my in- .vention'itis possib e to'run machines at double the present speeds, athousand ya'rds a -minute being'entirely practical, and at the sametime to produce an excellent,package.

This'result is accom lished by guiding the yarn onto the package y means of a traversing element, preferably a cylindrical roll,

having a surface groove in the form of oppo- 59 site crossing helices'extending the'length of 'age to the other and back again without bethe roll,'the roll being in contact or approximate contact with the yarn package, so that the yarn draws at a tangent to the traversingroll and occupies only a small length of the guiding groove. As a result'of this arrange-' ment there is no perceptible friction or strain imposed on the yarn by the traversing means, and as the traversing element is of small diameter it can run at high speeds without vibration.

An important feature of the invention lies in the construction and arrangement of the grooves at the crossings to insure that the yarn will be guided from one end of the packing diverted from its direction of feeder travel at the crossings. This is a matter of great importance as it is usually desirable that the direction of feed shall not be reversed except at the ends of the package. This re- .sult is accomplished by forming. the grooves so that the bottom of one is at a diiferent'level vfrom that of the other at the crossing, and

chamfering the projecting point separating one groove from the other at the crossing. I

delivery is quite close to the traversing roll. so

My invention is applicable to-winding ma chines in which the coil or package is either frictionally driven or positively driven.

In'the description of my invention and in the claims, I have used the term yarn to designate the material which is to be wound Whatever it may be, and the term package to designate the product formed b the machine. In the drawings, I have s own twoz embodiments of my invention, but I do not limit myself to these, since the invention appears to be of a basic character which bids fair to revolutionize the winding art.

One object of the invention 'is to provide atraversing-means for wmdmg 11180111110585 consisting in a single rotating element which.

may be operated at high'speed with a minimum of power consumption- Another object of the invention is to provide a traversing-means ,for winding machines which eliminates the use of bulky and heavy cams, while dispensing withthe usual thread-guide and other reciprocating parts connected to be operated therefrom.

Another object of the invention is to provide a traversing-means constituted by a. ro-

tating roll or drum which serves the double purpose of driving the cop, cone or package by surface contact therewith while also acting to feed the strand material thereon to traverse it longitudinally of the package.

Another object of the invention is to provide a-traversing-means constituted by a rotating roll or drum of relatively small diameter which may be driven at high speed to increase the rate of production of the winding machine without t he shock and vibration present in machines employing reciprocating thread-guides driven from cams.

Another object of the invention is to provide a traversing-means which operates on the thread, yarn or other strand material with less friction or abrasive action and which is adapted to control the reversal of the traverse of the strand more accurately and precisely to prevent overruns at the ends of the packa 'e.

Another object of the invention is to provide a traversing-means of the utmost simplicity, capable of being manufactured at low cost, and possessing greater durability in use.

Further objects of the improvement are set forth in the following specification which describes a preferred form of construction of the invention and several methods of applying it to use as illustrated by the accompanying drawings. In the drawings:

Fig. 1 is a front elevation of a portion of a winding machine, showing" the wmding-spindle'and rotatable yarn-receiver on which the package is. built in combination with the present improved traversing-means;

Fig. 2 is aplan view of the winding mechanism, showing the yarn-receiver as arranged to be driven from a rotating friction-drum o drive-roll and illustrating the traversingmilans as embodied in a separate grooved 3 Fig. 3 is an end elevation of the winding mechanism illustrated in Figs. 1 and 2;

Fig. 4'is an end elevation of a winding mechanism, showing a modified form of construction in which the package is driven diretifly from the grooved strand-traversing r0 Fig. 5 is aview-of the strand-traversing roll on the opposite side from that shown in 6 is an enlarged side view of the strand-traversing roll shown in a different position; I 7 Fig. 7 is a similar enlarged view of the roll, illustrated in a position opposite to that shown in Fig. 6;

Fig. 8 isan angular cross-sectionalview of the traverse-roll taken on line 8-8 of Fig. 7

Fig. 9 is a similar sectional view taken on line 9-9 of Fig. 6 i I 'Fig. 10 is a development of the surface of the strand-traversing roll; V

Fig. 11 is a schematic view representing the profile of the bottom of the groove in the traverse-roll; and v Fig. 12 is an enlarged fragmentary sectional view of the roll taken on line 12-12 of Fig. 7.

The present drawings illustrate the invention as applied to use on so-called frictiondrive or drum-driven winding machines in which the cop, cone or package is rotated through contact of its surface with the periphery of a cylindrical drive-roll or dgumr Itis to be understood, however, that the improved traversing-means forming the subject-matter of the present application may also be applied to use with winding machines 7 of other types; for instance, in combinationwith a winding mechanism in which the cop, cone or package 1s wound on a positivelydriven rotating spindle. 1 p I In F igs; 1, 2 and 3 of the drawings, 2 des1gnates in general the main frame of a winding...

machine which comprises a plurality of winding units arranged in gang form along a 'bed or table 3. A series ,of cross-arm brackets 4 extend laterally of and are bolted at 6 to the longitudinal rails 7 of the bed 3,

being provided with? bearings for the horizontal driving shafts which operate the several winding mechanisms. As illustrated in Figs. 1 to 3, each bracket 4 is provided with mountings or housings 9 for annular ballbearings 10 and 11, in whiclf are journalled two

parallel shafts

12 and 13. The rearward shaft 12 carries a series of cylindrical drive-rolls or drums 14, only one of which is illustrated in the different views. ward shaft 13 carries a series of the grooved traverse-rolls 15,-which serve as the means for feeding theyarn or other strand to and traversing it on the packages driven from the rolls 14. A similar' pair of shafts. are employed on the opposite side of the frame of the machine for carrying and driving the rolls which operate in connection with another series of winding units, but these parts are not illustrated in the present drawings as they are duplicates of the elements shown. The

shafts

12 and 13 are rotated both in the saine direction, as indicated by the arrows in nism located at .the end of the machine, the drive being in accordance with any usual arrangement and therefore not herein shown or described. v

Rising from the center of certain of the brackets 4 are uprights 16 formed with hubs 17 each of which supports-a rod 18 held fast therein by a set-screw 19. Pivoted on the The for- Fig. 3, through the means of driving-mecharod 18 is a forked arm 20 held in place by a collar 21 abutting the side of its hub and fastened to the rod by a set-screw 22. At the outer end of .the arm-20 is a bearing 23, in which is swiveled the cylindrical portion 24 of an auxiliary arm or extension 25. The arm 25 serves as a swinging support for the dead-spindle 26 on which the cop-tube or I wound the spindle 26 is held in parallel rela-v tion with respect to the drive-roll 14. This is the arm in the bearing 23, the latter being.

yarn-receiver is rotatably mounted to adapt its surface to contact with the drive-roll 14 while permitting it to move away therefrom as theyarn-mass is built up thereon. As

shown in the present drawings, the deadspindle 26 is adapted to rotatively support a tapered or conical cop-tube or yarn-receiver T on which the-strand-material is wound in the form of a cone. v

In winding conical masses of yarn the winding-spindle 26 is sometimes caused toalter its inclination to the surface of the drive-roll to build the cone with an increasing degree of taper 011 its surface, and in such cases the arm-25 is permitted, to turn in its bearing 23 on the arm 20 to provide for the tilting actionofthe" spindle. In other instances, the inclination of the spindle with respect to the drive-roll may remain constant, and where a cylindrical package'is-to be accomplished by clamping the portion 24 of split for this purpose and provided with a binder-screw or bolt 27. The arrangement of the cop-supporting means may be of the type shown or of any other suitable construction and the details of this part of the maing mechanism as illustrated in F gs. 1, 2 and 3, the traverse-roll 15 is construe ed of substantially the same diameter as the drive-roll 14 and is arranged in such'relation t -ereto and with respectto the pivot on whic the winding-spindle swings that the periphery of the mass being wound on the tube or receiver Twill invariablybear a close relation'to the periphery of the traverse-roll.

That is to say, the periphery of the yarnmass being wound W1 1 always be maintained adjacent to the surface of the traverse-roll I 15, but without contact therewith.

The traverse-roll 15 whichcon'stitutes an essential feature of the present invention may be constructed from a cylinder of suitable metal, such as steel, and heat-treated or-hardened to prevent undue wear on the sides of its grooves.- Preferably, it is formed in one.

length and provided with relatively thin disks 30 of the same diameter as its body portion secured to it's ends by means of screws 31. This construction provides that the groove, in the periphery of the roll may be cut clear through the metal at its ends so as to allow clearance for the milling cutter or tool, and the disks 30 are afterward applied to position to form the end walls of the groove. The roll 15 may be secured fast on its shaft 13 by means of a set-screw 32 or' through any other suitable key connection.

It has been stated that the groove in the periphery of the roll 15 is continuous from one end to the other and back again in the reverse direction, but for convenience of description that part of the. groove which extends in one direction will hereafter be referred to as one groove 35 and the other part 4 extending in theopposite direction as another groove 36. As herein shown, the two

grooves

35 and 36 are of uniform lead or pitch, but in some cases they may have a variable pitch and grooves having any desired number of convolutions about its axis. In the present illustration, each groove makes four turns or revolutions from one end to the other and there are consequently three crossing points on one side 1 i 95 of the roll and four on-the reverse side, see Figs. 1 and 5. With the grooves in the roll arranged as herein shown the yarn or other strand being guided and traversed therein will be caused to make four turns or convolutions around the surface'of the cop-tube or yarn-receiver at the start of the winding, assuming that the receiver is driven at the same rate of speed as the roll, but as the yarnemass increases in diameter the cop or package w1ll be rotated at a'gradually diminishing speed and consequently the strand will be laid with the traverseroll may be-constructed with'the a correspondingly less number of turns in its traverse from one end of the package to the other. In Fig. 1 of'the drawings, the cop or cone is shown as starting with afour .wind, but in other instances the traverse-roll may have its grooves so disposed as to startthewinding with a greater or less number of turns laid on the tube oryarn-receiver T. I

The grooves in the surface ofthe traverseroll 15 may be of suitable width to accommodate the largest size or thickness of yarn to be wound, or in other cases where there is a wide variance in the size of different kinds of material-to'be packaged different rolls may be-employed having their grooves cut' to the proper 7 size. The two

grooves

35 and 36 are of substantially uniform depththroughout a or-'; I

tion of their extent,-but at thepoints w ere they intersect the bottom profile of one groove is raised and thatof the other lowered, as

shown most clearly in Figs; 8, 9 and 11, in accordance vwith the direction inwhich 7 the A strand travels in the groove. In other words, one groove is lessene in depth and the other .130

groove is deepened,.the purpose of this novel and lngeniousarrangement being to prevent the strand from being diverted at the crossovers from the groove in which it is travelling in one direction to the groove extending in the opposite direction.

Referring to Figs. 6 and 7 of the drawings, which are enlarged views of the opposite sides of the traverse-roll 15, it will be noted that the

grooves

35 and 36 are bevelled off or chamfered on their sides at points beyond the crossovers, these ehamfered portions being designated generally by the reference character 37 and their location described more specifically hereinafter. It will be understood that when the strand travelling in one groove meets the other groove at the crossover there would be a tendency for it to catch on the point projecting toward the crossover so that it might be diverted into the groove extending in the opposite direction and thus fail to be traversed throughout the whole length of one groove before being reversed to return in the other groove. It is to prevent such diversion of the strand that the points at the crossovers are chamfered or beveled ofi as is more fully explained hereinafter.

In order to make clear the manner in which and therefore the cop-tube or yarn-receiver T will be rotated in the opposite direction as indicated by the arrows in Fig. 3. The

strand 1 of yarn, thread or other material is supplied from a suitable source, and drawing oif therefrom is led through a suitable tension-device, not'herein illustrated, usually arranged below and in front of the traverse-roll 15. The strand :1 leads from the tension-device to the traverse-roll 15 at a tangent to its peripheryfand to start the winding it is simply laid across the surface of the roll and its end attached to the-coptube or yarn-receiver T. As shown in Fig. 1, the end of the strand 3 is coiled or wound around a groove t at the end of the receiver T to fasten it thereto.

To start the winding operation the arm 20 is swung down to place the surface of the cop-tube or yarn-receiver T in contact with the periphery of the drive-roll 14, and

thereupon the receiver will be rotated from the roll towind on the yarn. The drive-roll 14 and traverse-roll 15 are driven continuously and as the receiver T starts to rotate to take up the yarn the turning-of the traverse-roll will cause the strand y to be entered into one or the other of the grooves 35, '36v on its surface.

The strand 3 will thus be caused to follow the grooves from one end to the other and back again, and as it feeds therefroin at the top of the roll it is directed onto the coptube or yarn-receiver T to traverse it longiin a conical mass asthe axis of the package recedes from the drive-roll 14 to accommodate the growth in the winding.

The method by which the strand is traversed and caused to follow each groove from end to end thereof without being diverted into the reverse groove at the crossovers will now be explained in detail. For convenience of explanation let it be assumed that the strand 3 is drawing through the groozfz 35 at the right-hand end or starting aoi of this groove indicated at m in Fi As the roll 15 turns in the direction of feed of the strand the la-tter'will follow the groove 35 from the point m in adirection toward the left. That part of the groove 35 extending from the point a: to the first crossover a on the opposite side of the roll 15 is of substantially one-half the maximum depth of the main portion of the groove, as indicated at 40 in Fig. 8. Slightly in advance of the first crossover a the bottom of t-hegroove 35 rises, as shown, at 41 in Fig. 8, until it is of relatively slight depth at 42. The purpose of this change in profile is to lift the strand in the groove 35 so that when it crosses the other groove 36 at the crossover designated a in Fig. 7 it will not be diverted into the groove 36.

Beyond the crossover a the right-hand wall of the groove 35 is chamferedor beveled off,

indicated .at 37 to eliminate a sharp point directed towards the path of travel of the strand in the groove. As the yarn y rides onthe raised bottom surface 42 of the groove 35, see Fig. 8, it passes across the groove 36 above the chamfered edge of the latter so that its direction of traverse is not influenced thereby. Beyond this point the groove 35 deepens again, as indicated by the dotted line At this point the strand will again be raised toward the surface of the roll to cause it to pass through thecrossover b at the minicrossover I as crossover.

g identical with those previously described mum depth to prevent it from b ing di= the groove 36 where it crosses the groove 35.. verted into the groove 36 which is of'maxi- At'the next Crossover c the groove .36 remum depth at'this' point. The relation of tains its full depth as previously indicated the strand as it draws through the second and from there on't-he maximum depth. is b is clearly shown by the dot-andmaintained through the crossovers b and a. dash line in Fig. 9, it being understood that the strand is delineated slightly above the delineation of the profile of the bottom of surface on which it rides to render the '

showthe grooves

35 and 36 aspresented in-Fig. ing clearer. 11, a brief recapitulation of the description Beyond the crossover b the profile 0f h of the groove formation will now be given. groove 35 recedes from the surface of the roll It ill b b d f o Fi 11 th t t t again, as indicated by the dotted line 45 1n ing t th i t m at th ight-hand nd of Fig, 9, and continues at the maximum depth the roll the groove 35 is of medium depth until a point Slightly in advance 0f the OI'OSS- until it reaches a point in advance 9f the 15 Over 0 is reach d 11 the pp Side f the crossover a where its bottom is raised to the IOll from the CIOSSOVGI b, SE6 At this minimum Beyond the crossover a it point there is again an abrupt rise in the botassumes the maximum depth again until Referring more particularly to the graphic tom of the groove, similar to the portion 44 the next crossover b is reached .whereit'j shown in Fig. 9. At the CI SOVeI h rises from maximum to minimum depth and strand g i Crosses 011 a g P I b II rides then recedes again to maximum depth with against the left-hand side of the groove 35, the same rise and fall at the crossover 0. the right-hand Wall of Which is chamfere From the crossover c the groove continues ofi in the manner as before explained to reat maximum depth through the crossovers (I,

0," f and 9' until it reaches a point .just m advance of its connection at a withthereturning The next crossoverdoccurs at apoint equigroove 36 where its botto'm rises to halfdistant from the ends of the roll 15 and in de th. this case the full depth of the groove 35 is maintained asindicated in Fig. 6. At this and continues thusto the crossing point g '30 location the other groove 36 has its left-hand where its bottom rises to minimum depth, and

move the sharp point directed toward the wall chanifered off to eliminate the sharp then beyond this crossover is again depressed point projecting toward the crossover. The to the maximum. At the crossover 1 its progroove 35 now continues at the m lmum file is again raised and lowered, and the same depth clear to its end, with the fifth crossat the crossovers e and "d. Beyond this point over e, sixth crossover f andv seventh crossits bottom is profiled at the maximum depth v r 9 of ex y the same m as desellhed and continues at this level through the crossin connection with the central crossover d.

At the end of the roll the terminus of the raised again to join the half-depth starting groove 35 connects with the groove 36 and nd of th groove 35, at this point its depth is less'ened so that the It will be observed from the foregoing that starting portion of the groove 36 leadlng through the peculiar and novel construction back toward the right is the same as the startof th groov in th traverse-roll 15 the ing portion of the groove 35, that is having a strand is caused to be raised at certain points depth as indicated at 40 in Fig.8. As the in travelling iii one direction so as to prevent strand travels back toward the opposite end it from being diverted into the opposite of the 'roll 15 feeding through the groove 36 oove' which has the maximum depth. At it is raised or lifted over the first grooye 35- other points the travel of the strand .will be at the first crossover g to be recrossed in this through those portions of the groove of maxidirection. At this point the oppositely exmum depth to prevent it frombeing diverted tending groove 35 1 Of im m depth-,as into the oppositely directed groove of less before noted, and the strand crosses it'at the depth, In this wa th strand is causedto upper level'as explained in connection with traverse in each direction to the full extent v the showing at 41 and 42 in Fig. 8- 'Th of each groove, whereby it is guided onto groove 36 then deepens abruptly and ontmthe package being wound in a series of'helical use at maximum depth-to the next crossover turns which cross and recross each other and to the showing at 44 inFig'. 9,'so that the of the package. strand once more passes through this cross In the modified form ofconstruction of the over at the upperlevel. The groove 36 deep} winding mechanism illustrated in Fig. 4, the ens again from this point on and is again separate drive-roll is dispensed wath by arformed with ,anabrupt rise at the next cross ranging the cop or package to be driven d1- over 6. The formation of this crossover is rectly from the traverse-roll 50. This roll at may be identical in construction wlth the g ai'fd ffandlikewfie the next crossover at cl roll 15 previously described, havlng its is the same as regards the rise in the level of grooves arranged inv the same manner to overs 0, Z) and a to the point m where it is he reverse groove 36 startsat half-depth f where. its'bo'ttom has a sharp 'rise similar build up in layers vf r ingthe. mass or body traverse the yarn back and forth on the package as the latter contacts with and is driven from the periphery of the roll. Other modifications may also be made in'the construction and arrangement of the parts of the Winding mechanism without departing from the spirit and scope of the present invention.

It will be observed that the invention provides an extremely simple construction of traversing-means for Winding machines which may be driven at high speed with a minimum of power consumption and without jar or vibration of the moving parts.

The heavy and bulky cam employed in previous types of winding machines is eliminated and no reciprocating traverse-bars and thread-guides are required so that the mechanism is much less subject to wear and deterioration.

Since the present improved traversingmeans comprises but one rotating element of relatively small diameter and little Weight the .,momentum and inertia of. heavy parts are avoided whereby an increased speed of operation of the machine may be eflected with less shock and jar and less wear and tear on the parts.

By mounting the operating shaft for the travers'ingmoll in ball-bearings the machine is rendered capableof high speed operation,

while being particularly smooth-running and quiet in operation.

With the improved traversing-means of the present invenfitiion the winding machine is rendered more e cient in use with its productive capacity greatly increased and its operating parts are much less subject to wear and deterioration.

It has also been demonstrated that the present improved traversing-means operates with greater precision and uniformity to produce etter winding without loose coils or overruns at the ends of the cop, cone or package. It is to be observed that when the package is driven by'surface contact with the traversing-roll the yarn guided in the grooves of the roll will have a lineal speed slightly greater than the peripheral speed of that portion of the groove with which the yarn is in contact.-

The roll will thus have a tendency to apply a certain degreeof drag ortension on the is laid on the package and therefore there will be less chance of stretching or pulling apart the fibers of the yarn as is the case where the tension is applied at some distance from the point of windlng.

Whilea preferred form of construction of the invention with one modification in the arrangement of the parts is herein shown and described-by way of example, it is to be understood that the invention is not limited to the present embodiment.

I claim: 7

1. A yarn-traversing device for winding machines comprising a rotating element having on its peripheral surface a groove in which the yarn is received and by which it is guided, said groove being in the form of opposite crossing helices, the point of one projection between opposite portions of the groove at a crossing being chamfered to insure the yarn being guided in a predetermined direction.

2. A traversing-means for winding machines comprising a rotatable roll having its periphery provided with a strand receiving and guiding groove extending in helical convolutions in one direction and back in the opposite direction with its convolutions crossing .each other, the points on the surface of the roll where the convolutions of the groove cross being chamfered ofi' to prevent the strand as it travels in one direction in the groove from being diverted into the oppositely extending portion of the groove. I

3. A traversing-means for winding machines comprising a roll having its periphery provided with a continuous groove extending helically in one direction and back in the opposite direction, with portions of different depth at the crossing points, and with portions of the edges of the groove chamferecl ofi to remove the-sharp points directed toward the crossovers.

4. A strand-traversing device for winding machines comprising a rotating element having on its peripheral'surface a strand receiv-- ing and guiding groove consisting of crossing and connecting helices, and means at a crossing point to control the passage of the yarn through the crossing.

5. A strand-traversing device'for winding machines comprising a rotating element having onits peripheral surface a-strand receiving and guiding groove consisting of oppositely extending crossing helices, and means at a crossing point to control the direction of the yarn at the crossing.

6. A strand-traversing device for winding machines comprising a rotating element hav- 1 ing on its peripheral surface a strand receiving and guiding groove consisting of crossing and connecting helices, and means at a crossing point to maintain the strand in that portion of the groove in which it is traveling and prevent it being diverted'into the other portion of the groove.

7. A strand-traversing device for Windingrnachines comprising a rotating element having on its peripheral surface a strandreceiving and guiding groove consisting of crossing and connecting helices, and means constructed in the roll at a crossing point to maintain the strand in thatportion of the groove in which it is traveling and prevent it being diverted into the other portion of the groove. 7 8. A traversing-means for Winding machines comprising a rotating element having on its peripheral surface a strand receiving and guiding groove consisting of opposite 1o crossing helices, a portion of thegroove at acrossing being deeper than the opposite portion of the groove at the crossing, and means at a crossing to prevent the strand being diverted from the direction in which it is traveling. I

9.- A traversing-means for winding machines comprising a rotating element having on its peripheral surface a strand receiving and guiding groove extending helically in 0 one direction and back in the opposite direction with its convolutions crossing and with the major portion of the groove of substantially uniform depth except at a crossing Where that portion of the groove extending in one direction is of less depth than the portion of the groove extending in the opposite direction.

10. A strand-traversing device for Winding machines comprising a rotating element having on its peripheral "surface a strand receiving and guiding groove consisting of oppositely extending crossing helices with a portion of the grove at a crossing cutaway'on its edge to prevent the strand as it't-ravels in one direction in the groove being diverted into the oppositely extending portion of the groove.

In testimony whereof I hereunto affix my signature.

: FRANKLIN AUGUSTUS REEGE.