US2048787A - Yarn packaging device - Google Patents

Description

July 28, 1936. w J. ELVlN AL 2,048,787

YARN PACKAGING DEVICE s Sheets-Sheet 1 Filed Aug. 30, 1934 ---am awm- Q 4 INVENTORS JOSEPH L. KILLORAN BVVYILLIAM J. ELVIN ATTORNEYS July 28, 1936. w. J. ELVIN ET AL YARN PACKAGING DEVICE Filed m. 50, 19:54

3 Sheets-Sheet 2 INVENTORS JOSEPH L. KILLORAN WILLIAM J ELVIN B 2.nilz7y- 0A ATTORNEYS July 28, 1936., w. J. ELVIN ET AL YARN PACKAGING DEVICE Filed Aug. 50, 1934 3 Sheets-Sheet 5 IllllI]IillIllIllllllllllllllilllllllll mm lllllllllllllllli!!! I illlllllllllllllllliili lllllilllll INVENTORS JOSEPH L. KILLORAN BV\V ILL\AM J. ELVIN ATTORNEYS Patented July 28,

YARN PACKAGING DEVICE William J. Elvin, Cumberland, M11, and Joseph L.

Killoran," Drummondville, Quebec, Canada, assignors to Celanese Corporation of America, a corporation of Delaware Application August 30, 1934, Serial No. 742,108

2 Claims. (Cl'. 117-25) This invention relates to a yarn packaging de vice and more particularly to such a device that draws yarns from a package such as a bobbin, imparts a twist to the yarn and winds the same into a cross-wound package such as a cheese. This invention also relates to a tube holder for holding the core, about which a package is wound, positively in position yet adapted for quick removal and replacement.

An object of the invention is'a commercially practical device which will twist and package fine filaments of yarns such-that the resultin package may be large say, 1 1bs., firm, free from tendencies to fluff at the ends and which is uniform in tension, without soft spots.

Another object of the invention is a commercially practical device which will twist and package fine filaments or yarns, that is automatic in response to failure of yarn or filament and one in which the yarns and filaments may be threaded quickly and full packages removed and empty cores inserted without disturbing the operation of the adjacent and/or companion elements, packages, etc. of the device.

5 Another object of the invention is a device so designed that the package formed thereon is uniform throughout. Other objects of the invention will appear from the following detailed description and drawings.

30 In the drawings wherein like numbers refer to the same or equivalent elements:

Fig. 1 is a perspective side elevation of a de-- vice, constructed according to this invention, with obvious frame and bearing members omitted. 35 Fig. 2 is an enlarged side elevation partially in section of the package lifting elements and core holding elements shown in Fig. 1.

Fig. 3 is an end view of the package lifting ele ments shown in Fig. 2. i 40 Fig. 4 is a detail, partially in section of a part of the coreholding device.

Fig. 5 is an end view of the core holding device shown in Fig. 4.

Fig. 6 is a. perspective side elevation of a part 45 of the device shown in Fig. 1 having a modified form of drive for the yarn guiding means.

Fig. 7 is a side elevation in detail of the drive mechanism shown in Fig. 6.

Fig. 8 is an end view partially in section taken 50 on the line 8-8 of Fig. 7 of a part of the drive mechanism.

In the commercial twisting and packaging of yarn, devices are built to twist and wind a plurality of yarns simultaneously so that power and floor space may be conserved and so that one operator may tend to the winding of a large number of packages. In such devices exhaustion of feed bobbins and breaks may occur, along a machine operated by one operator, faster than they can be refilled or spliced. In such'an' event 5 the take-up package being formed is rotated without tension on the free end of the yarn, which causes a loosening of the outer wrapplhgs of the package. If a yarn breaks the same difficulty is found on the package being formed. it) Moreover in starting up the device, since both hands of the operator are required to set the yarn stop device and feed the yarn into the guide, it is impossible for him to keep the feed bobbin spindle away from the driving belt so as 28 to stop its rotation with the result that'too much twist is imparted to the yarn and it tends to break. These difliculties are overcome by this invention in that the device is responsive to the failure of 20 the yarn removing the forming package from the source of power which causes it to rotate. It also throws the bobbin out of driving relationship with the source of power that causes it to rotate and applies a brake to same to bring it to a quick stop. Both the feed package or bobbin and the take-up or forming package are moved from operative to inoperative position without affecting the other similar units of the device. While thus in the inoperative position a new supply of yarn may be made or the failure of the yarn corrected without interfering with the'device as a whole and after correction the elements may again be thrown into operative positions. 3

In the cross-winding of packages, such as cheeses, the yarn is guided to the take-up package by means of a reciprocating guide member.' This guide member reciprocating transversely to the direction of rotation of the takeup,pac'kage directs the yarn of thread onto the package in a 40 spiral from one end to the other and back. .If the. rate of reciprocation is constant relative to the rate of rotation the point of reverse of the yarn:

will fall in ever so many cycles on the point of reverse of a former laid increment of yarn. In this manner a cross-wound package is formed the ends of which are not uniformly solid but contain hard spots where the points .of reverse of the yarn are one above'the other "and soft spots where the points of reverse of the yarn are not to be found. Some packages, depend ing upon the ratio of the traverse to the revolution of theyarn, may contain the points of reverse in lines radiating from the center making a package .very easily flufied, i. eQincrementsof 5 5 yarn forming arcs across the end of the package.

These types of packages cannot be roughly handled nor even employed in certain types of textile cnerations.

In employing the device forming this invention, however, the ratio of the reciprocation of the guide means is not constant in respect to the rate of rotation of the take-up package and therefore the points of reverse do not fall in limited areas on the end of the package but are evenly distributed throughout the area. This forms a solid package that may be shipped or otherwise handled and applicable to textile operations without fluffing at the ends. This is accomplished not by progressive change in the ratio referred to which would lead to the same fault as a constant ratio but by varying the ratio first to one side and then the other of a mean ratio.

In accordance with our invention we have devised a method and device for accomplishing the same that twists yarns and crosswinds them to a package which is solid and free from ununiform ends, and which device is responsive to the failure of yarn to prevent tangling of the yarn or loosening of the package. Two modifications of such a device are here shown and described in detail.

In the drawings, with particular reference to the modification shown in Fig. l, a motor is used as a source, of power imparting rotation to the pulley 2. The motor is mounted on a car or movable platform 3, which may be moved in a direction parallel to the length of the machine along supporting rails 4. The car or platform may ride on'wheels or rolls to reduce friction. The platform 3 has teeth cast onto or cut into it on each side to mesh with a gear 5. Gear 5 and lever arm 1 are directly connected to a shaft 6, suitably journaled in a bearing on the frame .trackway 4, and lever arm 1 is connected to a counterweight 8, said counterweight being shown as integral with lever arm 1 but, if desired, may be adjustable along lever arm 1. In place of an electric motor, as shown, other sources of power may be employed and corresponding belt tighteners adapted therefor. With the arrangement shown, any slack that may occur in the belt 9 is automatically taken up due to the force or pressure exerted by the counterweight 8 readjusting the position of the motor and the pulley 2. In place of the vertical motor a horizontal motor and appropriate gears may be mounted on the platform to accomplish the same result.

Pulley 2 drives belt 9, which may be supported in position by idler pulleys l9 and H spaced along either or both sides of the machine. The belt 9 drives pulley l2 and also a plurality or series of bobbin spindles l3, that may be spaced along either or preferably both sides of the belt run.

Bobbin spindles 3 may be pivotally mounted each on an arm l4, which may be pivoted in a tension spring pivot to a bracket IS. The tension spring may be mounted inside the housing l5 and fastened to I5 and also fastened to bracket IS, in such a manner that the bobbin spindle is forced toward a position so that it would be in driving relation to the belt 9. The bobbin spindle may have a guide for the belt formed by the flange l1.

The desired twist may be given to the yarn l8 by causing the bobbin spindle l3 and the bobbins 6| carried thereby to rotate at a greater rate than the yarn is drawn from the bobbin. The yarn is drawn through eyelets or guides l9 and cleaner 20 across a bar 99 and reciprocating thread guide 2| onto the take-up package 22 which is held in place by an expanding tube or core holder I90, more completely shown in Figs. 2, 3, 4 and 5, and which is driven by friction rolls 23. All parts contacting the yarn such as guides, eyelets, bars, etc. may be enameled or chromium plated or otherwise treated to furnish a smooth true surface that is not injurious to the filaments of the yarn. The friction rolls 23 may be covered with cork, compositions, etc. or they may be formed of wood, etc. 4

The pulley l2, driven by belt '9, may be directly fastened to shaft 24, which drives worm or bevel gears 25 and 26 that in turn drive shaft 21. Shaft 21 may be fastened to a gear 28 which drives gears 29 and 30. Each gear 29 and 39 is connected to a shaft 3| and 32 respectively, which have mounted thereon at spaced intervals 9. plurality of friction rollers 23 faced with cork or other composition. -The friction drive for the take-up package insures a constant speed of the periphery of the package and thus a constant feed rate of thread being applied thereto. There may be one friction roller for taking care of five or six spindles according to the spacing of the supporting frames, which are not shown in detail on the drawings. The rollers 23 may be solid or hollow metal rolls supported by hubs and spokes and are suitably locked to the shafts 3| and 32.

The shaft 3| is also directly fastened to a gear 34 which drives gear 35. Gear 35 and bushing 36 are directly fastened to shaft 31 that may be suitably journaled in the main frame, not shown. Bushing 36 is bored eccentrically and rotates inside a bearing on a lever 38. In place of the eccentrically pivoted bushing, a crank or other suitable element may be employed to give a reciprocating movement to the arm 38. The arm 38 is pivoted on a pin 39 which is adjustable in a slot 42 of a lever 40 and lever 40 is positively fastened to a shaft 4|.

Bushing 36 being bored eccentrically and rotating inside an arm 38 imparts a back-and-forth motion to the arm 38 through the center line of shaft 31 and center line of pivot pin 39 imparting to lever arm 40 and shaft 4| a rocking motion governed by the movement of arm 38. The shaft 4| may be suitably journaled in bearings in the main frame, not shown.

Arm 42 may be directly fastened to shaft 4| by means of keys or other suitable means. Thus arm 42 will be given the same rocking motion as lever arm 40. A rod 43, such as a steel wire, is pivotally connected to arm 42 and is adapted to ride back and forth, its outer end carried by a drop wire 44. The drop wire 44 may be suitably pivoted on a pin 91 which is securely fastened to bracket 98 attached to a part of the main frame. Drop wire 44 is held in a raised position by thread l8 as long as yarn is being taken 'up on tube 22. As soon as there is a failure of thread, drop wire 44 swings out and-down, since it is so pivoted on the pin 91. The drop wire 44 drops out past or beyond the line of travel of the thread l6 when I the thread is passing through the eyelets l9 and by a spring 49 resting on the trigger and the rear of the housing 46.

In operation, when the rod 43 is in a down position asshown, or equivalently when the yarn is being taken up on tube 22, the lug 45, which is adjustably fastened to rod 43, passes back and forth under trigger 48 and does not come in contact therewith, but when the thread breaks or there is a failure of thread allowing wire 44 to drop down, raising its projecting end and thus raising rod 43, lug 45 then comes directly in line with trigger 48 and contacts therewith. Due to the motion of arm 42, said motion being imparted to lug 45, the lug having a fiat rear abutment head contacts with trigger 48 pushing it back against the spring 49 and drawing the catch 41 into inoperative position from the seat on collar A collar H5 is directly fastened to a lifting rod 58. When catch 41 is drawn to its inoperative position from its seat on collar H5 it allows the lifting rod 58 to be forced upward by the action of a spring 5| which is under compression while catch 41 and collar H5 are coacting. Suitably positioned on the main frame is a bracket 62 that acts as a guide for the lifting rod 58 and as a bearing for the spring 5|.

The upper end of lifting rod 58 at 52 is made suitable to engage a bracket 53 which carries tube 22. The bracket 53 is adapted to pivot about a stationary rod 54 or other suitable means. Thus causing spindle as lifting rod 58 is released from catch 41 and raised by spring 5|, it engages at 52 the bracket 53 swinging it up and about rod 54 lifting therewith the package 55 on the tube 22 from the friction roll 23, stopping the rotation of the package. The bracket 53 has a split bearing formed by the arms 51 controlled by a screw 56, for decreasing or increasing the bearing pressure on rod 54. Thus the amount of throwof bracket 53 may be regulated so that it prevents jumping of the core holder with the package thereon and yet is not sufficiently tight to prevent free movement thereof.

A cam 58 is directly fastened to lifting rod 50 and suitable means provided for adjusting the height of same in respect to other elements of the device. As lifting rod 58 israised up cam 58 is also raised and engages with an arm 59, that may be a part or extension of lever arm l4, pushing it back and about l5 as a pivot. Arm 59, pivot housing l5 and arm l4 are integral, or adapted to function as such, and move as a single unit so that as cam 58 pushes arm 59 back and about pivot l5, arm I 4 is moved away from the device, |3 to be relieved of contact with belt 9. A stationary arm and brake member 68 are suitably attached to, or made integral with, bracket I6 that may be attached to bracket '62. As the arm I4 is rotated forward by cam 58, the whorl of spindle I3 is jammed against brake member 60 that may be lined with a suitablebrake lining. The-pivot housing I5 contains a coil spring fastened to the housing and the pivot rod of arm l6, that tends to force the spindle l3 against the belt 9. The brackets 62 and I6 may be fastened to the main frame in any suitable manner as by rods ||6and H1 in such a manner they may be accurately positioned in respect to.

wire 44 has been placed back of the thread. Wire 43 is then lowered due to the projecting end of wire 44 being lowered and thus ing 45 passes along underneath and out of contact with trigger 48. Catch 41 rides on collar H5 until collar H5 5 has been lowered by means ofpressing down on foot pedal 63 to a position where catch 41 reseats on top of collar H5, being forced in place by spring 49 contained in housing 46. When foot pedal 63 is stepped on, cam 58 is lowered allowing 10 arm 59 to move forward and arm l4 backward to engage spindle |3 with belt 9.

For guiding the thread onto the take-up package 55 there is provided a reciprocating guide member 2| that causes a cross-winding of the 15' thread upon the package. It is desirable that the reciprocation and thus the laying on of the thread upon the package have a mean speed relative to the peripheral speed of the take-up package yet a speed that varies to either side of the mean 20 speed such that the points of reverse of the thread upon the package will not fall with too great a frequency upon the same or about the same axial line causing a package that has an ununiform end. This may be accomplished by the driving 25 means for the cam that governs the reciprocation of guide 2|.

One method of varying the speed of reciprocation of the guide 2| is shown in Fig. 1 of the drawings to which particular reference is directed. 0 On shaft 3|33 is a sprocke wheel 64 suitably fastened thereto. A shaft 61 suitably journaled in the main frame has fastened thereto a sprocket wheel 65 that is driven from sprocket wheel 64 by a drive chain 66 which is preferably a roller 35 40 main frame, which shaft has mounted thereon a sprocket wheel 12.

On a shaft 16 suitably journaled on the main frame are gears 14 and 15 while on a shaft 19 also journaled in the main frame is a gear 11 and a cam 18 having a camway 8|. Gears 69, 14, 15, and 11 form a speed reducing mechanism carrying power from shaft 61 to cam-18 which may be replaced by any suitable speed reducing device.

A pin with a roller 88 engages the cam groove 8| of the cam wheel 18. The pin with roller 88 is fastened to a rod 82 suitably mounted for sliding movement which rod has a block 83 fastened thereto carrying a belt guide 84. Upon rotation of the friction rolls and shaft 3| there is set up, through shaft 61 'and the speed reducing mechanism a rotation of cam wheel 18 that imparts a reciprocatory movement to belt guide 84 that in turn moves the belt 18 back and forth across the cone pulleys thus. giving a variable speed to shaft 0 13. The cone pulley 68 and cone pulley 1| may be of the same size, but preferably the large end or-greater diameter of one is put opposite the smaller end or lesser diameter ofthe other thus effecting a variable speed of rotation of the driven 5 pulley 1| and the sprocket wheel 12 attached to its shaft.

Suitably journaled in the main frame is a shaft 88 having fastened thereto a sprocket wheel 85, registering with sprocket wheel 12, and a drum 7 cam 81" having camways 92 and 93. Sprocket wheel is driven from sprocket wheel 12' by means of a sprocket chain 86. In this way the variable speed of cone pulley 1| is imparted to has two grooves 92 and 93 cut in it at an angle of 90, or other suitable angle, to each other, and these grooves coact with pins and rollers as at 9| that are suitably fastened in a slide head 90, In a device having spindles along both sides it is preferable to have a slide head with its accompanying parts for each side, one side operating in groove 93 while the other side operates in groove 92.

The slide head 90 may be guided in its variable reciprocating movement by a slotted groove 94 in the drum cam housing 95. The slide head, through adjustable bar 96, is connected to a rod 89, preferably square in cross section, that is supported and guided at suitable intervals from the main frame. The rod 89 is connected to a plurality of thread guides 2|. There is one thread guide provided for each set of spindle and takeup package. The thread guides are automatic and thread themselves and they guide the thread as it is wound upon the take-up package 55.

The reciprocatory motion of the thread guides is derived from the shaft 3| through the cone pulleys and reciprocating cone drive belt 10. Thus there is imparted to the thread guides 2| a variable reciprocation having a mean speed derived from the cone pulleys when the belt 19 is at their centers and a maximum and minimum speed when the belt 10 is nearer the ends of the cones. As the speed of reciprocation of the belt 10 is at a reduced speed relative to that of the cones, a variable reciprocatory motion is imparted to the guides 2| such that the points of reverse of the threads are well distributed about the end of the take-up package.

In .operation the machine is started and assuming the devices have all been in operation the starting .operation for any one of the plurality of units on the machine is as follows; first consider ing the position of the various parts of the unit before it is started.

Drop wire 44 is in the down position, there being no thread l3 passing from eyelet |9 to automatic thread guide 2|. Rod 43 is raised because its supporting point on the projecting end of wire 44 in pivoting about pin 91 has raised. Lifting rod 50 is at the top of its stroke since catch 41 has been drawn back releasing collar 5. Bracket 53 is raised by lifting rod 50, and take-up package 55 is disengaged from. cork roll 23. Spindie [3 is disengaged from belt 9 and rests against brake 60.

The loaded bobbin 6| of the yarn desired to be twisted, or further twisted, is placed on spindle l3. The yarn from the bobbin is threaded through eyelets l9 and thread cleaner 20 and then by a suitable operation, fastened to tube 22 on expanding tube holder I00. The machine is running constantly, there being no need to shut it down in order to start a unit. The operator then holds the slack out of the yarn by drawing the yarn down across bar 99. Then upon stepping on foot pedal 53, take-up package 55 is let down to engage friction roll 23 and spindle I3 is released from stop 50 by lowering of cam 58 and put in driving contact with belt 9 due to the spring in pivot housing l5. As the yarn is taken up on package 55 which rotates due to friction with roll 23, automatic thread guide 2| is'in its variable reciprocating motion, and due to its self threading construction, picks up yarn or thread l8 and builds the yarn into a firm, self-supporting, cross-wound package, such as acheese, on the tube; the variable reciprocation of the guide 2| being sufliciently rapid to form a solid cross-wound package.

The term yarn and thread are here used as substantially synonymous and may include fibers or filaments ofany suitable materials such as filaments of organic derivatives of cellulose, regenerated or reconstituted cellulose, silk or mixtures of these or the yarns may be formed of fibers twisted or otherwise held together of cotton, wool, flax and the like.

By reason of the automatic take-up package lifter, which disconnects the applied power that causes rotation of the take-up package upon failure of thread, tubes and bobbins may be'exchanged and threads spliced on one set of a plurality of twisting mechanisms of the device without interfering with the remaining sets of the device. To still further increase the number of packages that one operator can maintain in running condition there is need of a quick yet positive means of removing a completely filled package and inserting an empty package core or tube. This desired result is accomplished according to this invention by means of an expansible tube holder as shown in detail in Figs. 2 through 5 on the drawings.

A suitable bracket 53 for supporting a tube 22 is provided having means for raising same on failure of thread or by the operator when a complete package has been formed on the tube. This bracket may be of any suitable construction but for the particular device shown in Fig. 1 it may consist of a bracket body 53 having a U shaped portion, the ends of which are split bearings 51 adapted to' be mounted for pivotal movement about a stationary rod 54, and an arm I for supporting an expanding tube holder 0. Arms 51 are drilled for rod 54 and slotted in an approved manner at 2 to provide a spring action about the rod 54. The spring action of the arms 51 may be governed. by screws 55. Screws 56 are preferably long enough for a suitable compression spring IM to be placed under its head for forming a resilient adjustment for arms 51. The more pressure applied to stationary rod 54 by bearing arms 51 causes the bracket 53 to pivot about the rod with a more determined action.

In operation, tube 22 when the operation has first started, or yarn or thread 55 when the operation or winding process has advanced so that yarn substantially covers tube 22, comes in contact with the friction or cork covered roll 23 or we may say lies on cork roll 23. The lie of the take-up package on roll 23 is governed by the amount of adjustment made to bracket arms '51 by. cap screws 55. The tighter the adjustment the more steadyand/or fixed will the package lie on the friction roll 23, eliminating what is known as dancing" or jumping of the package.

The U shaped bracket may be provided with w an extended arm I having a split bearing controlled by the clamping screw I93. This bearing is adapted to hold a nonrotating shaft I02. The U shaped bracket may also be rounded where it engages 52 for more sure registry with the lifting means.

H8 about its circumference. Expanding tube holder H is also provided with an external shoulder I20 at one end that acts as a stop when placing in position the tube or core 22 on which the thread or yarn is to be cross-wound.

Thimble I05 which is suitably formed to receive radial thrust bearings I06 and thrust collar I04 and thimble I2 I which suitably formed to receive radial thrust bearings I06 and retainer collar I01 are placed one in each end of the expanding holder IIO. This assembly is placed on shaft I02. The retainer collar I01 may be held in place in the assembled device by means of a left hand threaded cap screw I08. The purpose of using a left hand thread on I08 is to insure that the retainer collar I01 shall always be held tightlyin place, since the direction of rotation of the assembly is left handed when viewed from the outer end of the shaft I02. Other locking means 0 may however be employed.

Thrust collar I04, is provided with a suitable handle I09. Thrust collar I04, retainer collar I01, and thimbles I05 and I2I', may also be provided with suitable oil grooves and washers to prevent 25 throwing of lubricating oil. Thimbles I05 and I 2 I are so constructed so that they will ride freely and easily along inclined surface or shoulders II8 of expanding holder I I0.

In operation, handle I 09 is raised to position 30 shown in dotted lines in Fig. 3, and when in this position there is no expansion of tube holder I I0. The tube or core 22 may be freely slid on or off the holder. In loading, a tube or core 22 is placed in position on holder H0 and against the 35 stop shoulder I. Handle I09 is then moved to the position shown in full lines in Fig. 3 which causes the actuating thrust collar I04 to rotate about shaft I02 through buttress threads I I4 and H3 in a direction that will force it against the 40 bearing I06. Thimble I05 being forced inwardly of the holder, by action or feed of the buttress threads H4 and 3 through bearing I06 causes an opposite and equal pressure on thimble I2I' through expanding holder I I 0, since thimble I2 I,

5 its bearing I06 and retainer collar I01 are held in an axial stationary position by cap screw I08. The action of thimble I05 moving inwardly and exerting pressure to thimble I 2I through expanding holder IIO causes expanding holder H0 5 to expand in a radial direction. This expansion *grips the tube or core 22 and holds it in place during the winding operation.

, At the completion of the winding operation, the handle I09 is again moved to dotted line position,

55 whichcauses, through buttress threadsII3 and H4 acting on collar I04 and shaft I02 respectively, to relieve the pressure on the bearings I06, and on the thimbles I05 and I2I'. This pressure being relieved, and the expanding tube 0 holder not having been forced past its elastic limit, resumes its original shape and in so doing forces the thimbles I05 and I2I', apart. The internal pressure on the tube or core 22 is then released and the completed cheese or other package 65 55 may be removed.

In a modified form of my device as shown in Figs. 6 through 8 there is employed a simple form of drive for imparting a variable reciprocation to the thread guides 2 I This drive device is adapted 70 for use on automatic-twisting devices and especially on the type .shown in Fig. 1. In .the drawings, with particular reference to Figs. 1 and 6 there is shown a. shaft 3I33 upon which is mounted a friction roll 23, that supports and turns 75 a take-up package 55. The shaft 33 is driven from a suitable source of power through gears 25, 26, 28 and 23 (see Fig. 1).

on shaft 33 is fastened a sprocket wheel 64. Suitably journaled in the main frame is a shaft II6 lying parallel to and beneath shaft 33 having 5 fastened thereto a sprocket wheel III that registers with and is driven from sprocket wheel 64 by a sprocket chain II8 imparting a positive movement to shaft H6 in timed relation to the peripheral speed of the take-up package 55. 10

Fastened on shaft II6 by means of a key H9 or other suitable means are two gears I20 and I2I. Gear I 20 is slightly larger than gear I2I.

A shaft 88 suitably journaled in a drum cam box 95 that is a part of the main frame has fas- 15 tened thereto a drum cam 81. The shaft 88 has mounted thereon and rotatable with respect thereto two gears I22 and I23 that register with and are driven from gears I2I and I20 respectively. The diameter of gear I23 is less 20 than the diameter of gear I22 so that in registering with gears I20 and I2I the shafts H6 and 88 may be substantially parallel.

Fastened to or made a part of gear I22 is an elliptical gear I24 eccentrically pivoted on shaft 25 88. Gear I23 is formed with a bearing member I25 in which is mounted a shaft I26 adapted to rotate therein. The shaft I26 has fastened thereto as by a key I2'I or made integral therewith an elliptical gear I28 mounted eccentrically of shaft 30 I26 and in registery and'driving relation to elliptical gear I24. On the opposite end of shaft I26 is a gear I29 fastened thereto by means of a key or other suitable means.

Keyed to, or otherwise suitably fastened in driving relation to shaft 881s a gear I30 thatregisters with and is in driving relation to gear I29 on shaft I26. The gear I30 is keyed to or otherwise fastened to shaft 88 and imparts rotation thereto which-in turn rotates drum cam 81. On 40 drum cam 81 thereis two cam ways 92 and 93 in the latter of which a roller pin 9| is adapted to be guided. Pin 9| is suitably fastened to a slide head 80 that is fastened by adjustable rod 96 to the reciprocating'thread guide holder rod 89.

The action of the drive mechanism is as follows: Shaft I I6 is .driven by a suitable gear wheel or chain from the friction roller drive shaft 33. The two gear wheels I22 and I23 then rotate at slightly different speeds so that there is a relative motion between them to give one relative revolution for each complete cycle of traverse variation. The major and minor axes of the elliptical wheels may be chosen to give the required variation of traverse on either side of the mean speed. The elliptical wheel I28 will make one revolution for each revolution of the wheel I22 relative to the wheel I23. Since the wheels I28 and I29 are both positively fastened to thesame shaft, it follows that the wheel I30 must make one revolution relative to the wheel I23 for each relative revolution of the wheel I22, but since the wheel I30 gets this motion through the elliptical pair of wheels, its speed will not be uniform. The net result is to superimpose a variable velocity on to the uniform velocity of revolution transmitted to the wheel I23. The mean velocity of revolution of the shaft 88 and the cam drum 81 will be the same as that of the wheel I22, but there will be a slow relative backward and forward movement of the shaft 88 with relation to the wheel I23.

' Obviously many additions and alterations may be made in the disclosed device without departing from our invention. For example a device 7 may be inserted between eyelets l9, or at another suitable point for treating the twisting yarn with lubricants, sizes, plasticizers or other treating liquids, gases or 'solids. Further the complete assemblymay be of any desired size and contain any suitable number of sets or units that may be spaced along one or both sides of the assembly. The height of the device and thus shaft 24 may be any suitable height to compensate for size of balloon formed and auxiliary treating elements attached. Guides l9 may be adjustable as by permitted, regulated movement of the bars to which they are attached. Other like modifications may be made.

It is to be understood that the foregoing detailed description and drawings are merely given by way of illustration and many alterations may be made therein without departing from the spirit of our invention.

Having described our invention what we desire to secure by Letters Patent is:

1. In a device for unwinding yarn from a bobbin and rewinding the same onto a take-up package, wherein the bobbin is mounted on a spindle driven by a rotating member and the take-up package is rotated by a friction drum, the combination with a drop wire normally held in raised position by the yarn being wound, of a lifting rod having a spring thereon, means for holding said lifting rod depressed against the action of the spring and means for releasing said holding means, said releasing means including a member adapted to reciprocate out of contact with said holding means and adapted upon breakage or failure of the yarn to be raised, by the-fall of the drop wire, into operative position for releasing the lifting rod holding means, the construction and arrangement being such that the released lifting rod operates to simultaneously remove the spindle from contact with said rotating member and the take-up package from contact with said friction drum.

2. In a device for unwinding yarn from 9. bobbin and rewinding the same onto a take-up package, wherein the bobbin is mounted on a spindle driven by a rotating member and the take-up package is rotated by a friction drum, the combination with a drop wire normally held in raised position by the yarn being wound, of a lifting rod having a spring thereon, means including a trigger for holding said lifting rod depressed against the action of the spring and means for releasing said holding means, said releasing means including a lug-carrying member adapted to re- 7

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