US2409639A

US2409639A - Bobbin winding machine

Info

Publication number: US2409639A
Application number: US450129A
Authority: US
Inventors: Marcellus Brooks
Original assignee: Barber Colman Co
Current assignee: Barber Colman Co
Priority date: 1942-07-08
Filing date: 1942-07-08
Publication date: 1946-10-22
Anticipated expiration: 1963-10-22

Description

.i5 Sheets-Sheet 1 Oct. 22, 1946. a. MARcELLus BOBBIN WINDING MACHINE Filed Jull,

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8, 1942 CCL '22, 1946- B. MARcELLus BOBBIN WINDING MACHINE Filed July 8, 1942 15 Sheets-Sheet 2 F (PLANVmw) INVENTOR ,Bron/f5 Marcc/lus ATTORNEYS Oct. 22, 1946.

a. MAncELLus 2,409,639

BOBBIN WINDING MACHINE Filed July a, 1942 15 Sheets-sheet 4 INVENTOR Broc lr.: Marcel/u.:

0d. 22, 1946- a. MARczLLus BOBBIN WINDING CHINE Filed .my s. 1942 1s sheets-suns s 4 0d. 22, 1946. B, MARCELLUS 2,409,639

BOBBIN WINDING MACHINE Filed July 8, 1942 15 Sheets-Sheet 5 INVNT .Brooks Marc e//z/.s

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ATTORNEYS Oct. 22, 1946. v a. MARcELLus 2,409,639

soenna wmmua MACHINE Filed July s. 1942 15 sheets-sheet '7 IVENTOR Il roo .s ar-ce u s By m4. ha

ATTORNEY 0d- 22. 1946. a. MARcELLUs BQBBIN WINDING MACHINE Filed July 8, 1942 15 Sheets-Sheet 8 mvENToR Brno/fs Marc ellas Y BY 0d. 22, 1946. B, MARCELLUS n y 2,409,639

Bom wnmms MACHINE Filed July 8, 1942 15 Sheets-Sheet 9 INVENTOR Brom/x15 Marce/fas ATTORN EYS o@ 22, 1946- B. MARcELLus 2,409,639

BOBBI INDING CHINE Filed July 8, 1942 15 Sheets-Sheet 10 Brook Marcel/us ATTORNEYS Oct. 22,` 1946. B. MARcELLUs BOBBIN WINDING MACHINE FiledlJuly 8, 1942 15 sheets-sheet 11 /Sw l 1.,

L INVENToR rocks Marcd/us ATTORNEYS 0t- `22, 1946 B. MARcELLUs 2,409,639

BOBBIN WINDING MACHINE Filed July 8, 1942 15 Sheets-Sheet 12 INVENTOR roalfs Marce/lus Oct. 22, 1946. a. MARcELLus 2,409,639

BOBBIN WINDING MACHINE` Filed July a, 1942 15 sheets-sheet 1s INVENTOR Y raolf Marce/lus ATTORNEYS Oct. 22, 1946.

B. MARcELLus BOBBIN WINDING MACHINE 4 15 Sheets-Sheet 15 MQ Stb SQ immun :am

/ UWNNVA\ M NN x20 tvkbab 5x2 Filed July V8, 1942 n" 2,6 .SrLzoD INVENTOR Brab/rs Marce/lus an; /Z/qn.

ATTORNEYS zorool :ut Nt \v Patented Oct. 22, 1946 BOBBIN WINDING MACHINE Brooks Marcellus, Rockford, Ill., assignor to Barber-Colman Company, Rockford, Ill., a corporation of Illinois Application July 8, 1942, Serial No. 450,129

57 claims. l

The invention pertains to a machine for winding bobbins of the type employed in loom shuttles and commonly known as cops or pirnsf The primary object of the invention is to provide a machine capable of producing fillingwound bobbins automatically at a rate substantially higher than has heretofore been possible.

A further object is to provide a bobbin winding machine embodying a series of winding units operating to produce a plurality of filling-wound bobbins simultaneously, with a driving and control mechanism of an advantageous character common to the several units.

A further object is to provide an automatic bobbin winding unit having a new and improved automatic donning and discharge mechanism.

Another object is to provide in such a machine an automatically operating bunch builder of improved construction in combination with a new and improved form of traversing device.

A further object is to provide a winding machine having various mechanisms to be operated automatically and in a predetermined timed relation, and an effectual control means governing the actuation of said mechanisms in proper sequencc.

The objects of the invention thus generally stated, together with other and ancillary advantages, are obtained by the construction and arrangement shown by way of illustration in the 3 accompanying drawings forming part hereof, in which:

Figure 1 is a fragmentary front view of a bobbin Winding machine constructed in accordance with my invention and embodying a series of winding units arranged side-by-side.

Fig. 2 is a fragmentary plan view on a somewhat larger scale.

Fig. 3 is a transverse sectional View somewhat schematic in character and illustrating the arrangement of the major parts of each winding unit.

Fig. 4 is a fragmentary transverse sectional view taken approximately in the plane of line 4-4 of Fig. 1.

Fig. 4 is a fragmentary sectional view showing a portion of the gear train for driving the winding spindles.

Fig. 5 is an enlarged fragmentary sectional view transversely of the machine and showing the means employed in each unit to rotatably support the bobbins during the winding operation.

illustrating the yarn traversing device in association with each spindle.

Fig. 7 is a side elevational view of a bobbin and showing somewhat schematically the manner in which the yarn is wound thereon.

Fig. 8 is a fragmentary perspective View of a chuck for gripping the butt end of the bobbin.

Fig. 9 is a fragmentary vertical sectional View illustrating the manner in which the running strand is led from a suitably supported yarn mass to a bobbin being wound, and showing the parts in the position occupied during the winding operation.

Fig. l0 is a fragmentary front elevational view cf the yarn supply mechanism.

Fig, 1l is a fragmentary horizontal sectional view further illustrating the means for controlling the running strand in its passage from the yarn mass to the bobbin.

Fig. l2 is a fragmentary front view of the device shown in Fig. 11.

Fig. 13 is a fragmentary perspective view illustrating more particularly an escapement mechanism controlling the release of bobbins one at a time from the empty-bobbin magazinel and the means for receiving and temporarily supporting the filling-wound bobbins until the new bobbin has been placed in position.

Fig. 14 is a front view of a bobbin magazine with parts broken away and other parts shown in section to illustrate the construction.

Fig. 15 is a fragmentary perspective view of a donning mechanism.

Fig. 16 is a plan view of a shearing and clamping device for seizing and holding the strand during the donning operation, parts being broken away to show the construction.

Fig. 17 is a fragmentary elevational view of the shearing and clamping device looking from the right in Fig. 16.

Fig. 18 is a fragmentary perspective view illustrating more especially a bunch building mechanism.

Fig. 19 is a fragmentary perspective view further illustrating a yarn positioning means.

Fig. 20 is a fragmentary sectional view showing the details of construction of the yarn clamp.

Fig. 21 is a. fragmentary perspective view illustrating the mechanism for producing a feed or builder motion, and the means for controlling the starting and stopping of the machine.

Fig. 22 is a fragmentary end elevational view showing in particular the frame member at the Fig. 6 is a fragmentary side elevational View 55 right-hand end of the machine with its cover 3 removed to illustrate certain parts of the drive mechanism.

Fig. 22a is a fragmentary sectional view sub'- stantially on line 22e-22a of Fig. 22 and showing a portion of the drive mechanism.

Fig. 23 is a fragmentary sectional View taken approximately in the line 23-23 of Fig. 22 and illustrating other details of the drive mechanism.

Fig. 24 is a fragmentary perspective View of a bobbin sorting and packaging means.

Fig. 25 is a schematic view illustrating the control means governing the operation of the machine.

Fig. 26 is a time chart of the main cam shaft of the control means.

The machine in genera-l In the preferred embodiment of my invention the machine comprises a plurality of winding units having a common drive and control mechanism whereby the several units operate to produce filling-wound bobbins simultaneously in each operating cycle of the machine. As shown the machine comprises an elongated horizontally disposed frame, and the individual Winding units, of which ten are shown in the exemplary embodiment, are arranged side-by-side with the winding spindles disposed horizontally and extending transversely of the machine in laterally spaced relation as shown best in Fig. 2.

Referring now to Figs. 1 to 4, with particular reference to Fig. 3, each of the winding units comprises a bobbin holding means generally designated A for rotatably supporting the bobbins to be wound with yarn supplied from a yarn supply B. Below the spindle supporting means is a means C for receiving and temporarily supporting the wound bobbins after the same have been released from the holding means A. D designates an empty bobbin magazine having an escapement device controlling the successive release of empty bobbins onto an underlying empty-bobbin carrier or donning slide E. After a filled bobbin has been released from the winding,` spindle and deposited in the receptacle C, the donning slide E is advanced to introduce an empty bobbin into operative position relative to the winding spindle and as an incident thereto to clamp the strand extending from the source B to the filled bobbin. F designates generally a shearing and clamping device operated in the advance of the donning slide. As the yarn is being wound it is operated upon by a traversing device G. Preliminary to the initiation of the winding operation, the traversing device occupies a retracted position and at the beginning of the winding operation the thread is operated upon by an independent traversing device constituting a bunch builder H. From the receiving means C the iilled bobbins are discharged downwardly and forwardly into pockets I by which they are arranged for final discharge into underlying containers J (Fig. 4).

The several winding units, together with the driving and control means for the Various mechanisms, are embodied in a machine frame comprising a pair of end standards I and 2, upper and lower rear bars 3 and 3, (Fig. 4) and a pair of front angle Vbars 4 and 4a, the latter being supported forwardly of the frame by end brackets 5 (Fig. 2). The'end standards I and 2 are in the form of hollow castings forming chambers within which various parts of the driving and control mechanism are enclosed, the outer sides of the chambers being closed by removable covers. Inasmuch as all of the winding units are alike in construction and operation, it is necessary to describe one only of these units following which the driving and control means for the machine will be described.

Bobbin holding means Referring now to Figs. 2, 4 and 5, the bobbin supporting means A comprises a spindle 6 provided with a chuck I for receiving the butt end of bobbins b to be wound, and a tip holder or tail center 8 releasably supporting the tip end of the bobbin. The spindle (see Fig. 5) is suitably journaled in bearings provided in a tubular extension `9a of a housing 9 stationarily supported upon the longitudinal frame member 3a (Fig. 4). Upon the rear end of the spindle 6 is xed a pinion I0 (Fig. 4e) meshing with a spur gear II which in turn is driven from a drive shaft I2 extending longitudinally of the machine, this shaft being common to al1 of the units (Fig. 2). The housing 18 has a rear portion enclosing bevel gearing I3 on the shaft I2 and a short shaft III, the latter being connected with the spur gear I I by means of intermeshing gears I5.

The bobbin chuck I (Fig. 5) is of a construction adapted when the spindle is idle to receive freely the butt end of a bobbin and when in operation to grip the bobbin by the action of centrifugal force. As shown in Figs. 5 and 8, the chuck consists of a plurality of jaws formed on lingers Iii pivoted intermediate their ends at I'I upon a head I8 fast on the forward end of the spindle 6. The rear ends of the jaws are enlarged to form weights I9, and the arrangement is such that when the spindle is rotated at high speed the jaws will be swung inwardly from their pivots under the action of centrifugal force to grip firmly the butt end of a bobbin inserted between the jaws.

The tail center 8 comprises a cup-shaped mem ber 2li shaped to receive the tip end of the bobbin and mounted for movement into and out of engagement with the bobbin in a direction generally axially thereof. The cup member is supported through the medium of antifriction bearings in the lower end of an arm 2I arranged for limited movement under the influence of a spring 22 relative to an arm 23 fast on the rock shaft 2`fl which extends longitudinally of the machine and is common to all of the units. Relative movement between the two arms by the spring 22 is 1imited by interengaging abutments 25 and 25a.

When the shaft 24 is rocked to carry the cup member 20 into engagement with the tip end of the bobbin, continuing movement of the shaft operates through the arm 23 to place the spring .22 under tension thereby holding the cup member 2.5 yieldably against the bobbin.

Rocking motion is imparted to the shaft by means of a disk cam 26 (Fig. 4) mounted on a main cam shaft 2l' extending the full length of the machine and forming part of the control means common to the several units, the motion of the cam being transmitted to the rock shaft 24 through the medium of a follower lever 28, link 29 and arm 3l), the latter fast on the shaft 24. The cam 26 is shaped so as to cause the tail center to occupy an elevated position upwardly and to the left of the position shown in Figs. 3 and 4 during the rearward movement of the empty bobbin by the donning slide as hereinafter set forth.

Yam supply Mounted upon the main frame above the winding spindles is a superstructure for supporting the yarn supply means B. This means comprises a series of yarn masses from which individual strands s are led downwardly to the various bobbins. As shown, the yarn masses are in the form of large conical packages c (Figs. 9 and l0) enclosed within individual housings 3|, the latter having open forward ends normally closed by covers 32 which are suitably apertured at 33 for the passage of the running strands. After passing over guide pins 34 disposed forwardly of the apertures 33, the strands s continue downwardly through tensioning devices 35 and then over guiding

elements

36 and 31 to the bobbin.

The yarn masses c are mounted upon suitable supports 38 carried by a channel bar 39 extending lengthwise of the machine and forming part of the superstructure, the housings 3i being also mounted upon said channel bar. At its opposite ends the bar 39 is supported upon a pair of standards 49 mounted upon the upper ends of the end members l and 2 of the main frame.

The cover 32 of each of the housings 3| is supported for independent raising and lowering movement and is yieldably held in either closed or open position. For this purpose, the cover is pivotally supported upon the forward ends of two parallel arms 4I and 42 pivoted respectively upon

rods

43 and 44 extending the full length of the machine and mounted at their opposite ends in the standards 49. Each of the covers has an upper end portion projecting when in its closed position above the casing and terminating in a tongue 32a (Fig. 10). The arm 4I is pivotally connected to this tongue and the arm 42 has a yoke 42*1 pivotally connected to the sides of the cover and shaped to encircle partially the rounded upper side of the casing. At its rear end, the lower arm 42 carries a counterweight 44a to facilitate movement of the cover.

To hold the cover yieldably in either open or closed position, an overcenter device is employed. This device comprises a curved link 45 having one end connected by a contractile spring 46 to the channel rail 39 and the other end pivoted to the arm 4i above and forwardly of its pivotal axis 43. The operation of the device in holding the cover either open or closed will be apparent from a comparison of the full and broken line positions shown in Fig. 9.

The aperture 33 provided in the cover for the passage of the strand has a rounded edge so as to avoid undue chafing upon the strand, and to facilitate threading of the strand through the aperture the vcover plate is formed with a slot 49b (Fig. 19) terminating at one end in the aperture and at its other end ln a notch 46a at the lower right-hand corner of the plate. Mounted forwardly of the aperture is the guide pin 34. This pin is carried by a plate 41 extending forwardly from the cover plate.

The forwardly extending plate 41 provides a support for the tensioning device 35. The latter (Figs. l and 9 to 12) consists of a grid composed of a plurality of fixed pins 49 and a series of intervening movable pins or ngers 49, the latter mounted in suitable bearing heads 49a to swing on an upright pivot pin 59 carried by a bracket 5I on the supporting plate 41. The iingers 49 extend through slots 52 in the plate 41 and the pivotal ends of the fingers are acted upon by individual contractile springs 53 tending to swing the fingers against a running strand bearing against the grid formed by the stationary pins 48.

To facilitate threading of the strand through the tensioning device, a yoke 54 is mounted upon 5 the pivot pin 59 and provided with a plurality of lugs 55, one for each of the lingers 49. These lugs are engageable with the supporting heads 49 as shown clearly in Fig. 11 upon a swinging movement of the yoke in a clockwise direction. For convenience, the yoke is provided with a handle 56. By movement of the handle the yoke is swung against the action of a spring 56 from the full line position to the broken line p0- sition shown in Fig. 11. In this movement of the handle the fingers 49 are swung forwardly through an arc indicated by broken line positions, the foremost position being open or threading position. Upon release of the handle, the fingers 49 return to the full line position shown in said figure in which they are held by their individual springs in engagement with the running strand.

Lint produced in the passage of the yarn through the tensioning device is removed through the provision of an exhaust system comprising an exhaust chamber 51 for each of the tensioning devices and an exhaust trunk 58 extending lengthwise of the machine and connected with each of the chambers 51 by means 0f a flexible tube 59. Each exhaust chamber 51 is formed in cooperation with the supporting plate 41 on the cover plate 32 by means of a member 51a positioned on the side of the plate 41 opposite the pivot pin 59 and provided with slots 69 for the passage of the fingers 49. The Islots 99 aredisposed adjacent the point of engagement of the running strand with the tensioning device, and the lint formed as an incident to the engagement of the strand with this device is drawn through these slots into the chamber 51 and thence by way of exible tubes 59 to the exhaust trunk 58.

After leaving the tensioning device, the running strand extends downwardly and rearwardly (Fig. 9) to the guide element 36 which is in the form of a pin carried by a suitable bracket 9| secured to and extending upwardly and forwardly from the upper longitudinal frame member 3, the pin 36 being supported above the winding spindle and in a longitudinal plane disposed somewhat rearwardly of the chuck 1 on the forward end of the spindle. Finally the strand is led downwardly over the guide 31 to the bobbin being wound, or if no bobbin is in position, then to a point below the winding spindle where it is held in position to be seized in the next winding cycle las will presently appear.

Empty bobbz'n supply The empty-bobbin magazines D are mounted 60 forwardly of the Winding spindles with their lower ends disposed somewhat above the horizontal plane containing the axes of the spindles; and operatively associated with each of the magazines is an escapement device controlling the release of the bobbins one at a time onto the underlying donning slide E. As shown in Figs. 2 and 13, each of the magazines comprises two side plates 62 and a back plate 63 cooperating to form a Vertical channel adapted to receive and hold the stack of empty bobbins, the cross-sectional shape of the magazine conforming substantially to the lateral dimensions of the rear ends of the Dobbins and the front of the magazines having a narrow slot 64 defined by the front edges of 76 the plates 62 to permit passage of the forward end portions of the bobbins. The magazines are supported in the present instance by means of brackets 65 mounted upon the longitudinal front frame member 4 with the lower en'd of the magazine spaced above the frame member to accommodate the donning slide E (see Fig. 14)

The escapement device for releasing the bobbins comprises a rectangular rocking frame 66 equipped with two pairs of bobbin engaging lingers 91, 61B and 89, 68a. The rear end portion of the frame straddles the lower end of the magazine and is pivoted to the bracket 65. rThe front end of said frame is pivoted on a bracket 69 carried by the front longitudinal frame member da. The fingers 61 and 61a are secured to one side of the frame and the

fingers

68 and 68 to the other side, the former being of a length to engage with the lowermost empty bobbin (Fig. 14) when the frame occupies its normal position, and the other fingers B8 and 6|!a being somewhat shorter and adapted when the frame is rocked from its nor mal position to enter between the lowermost bobbin and the next succeeding bobbin.

The esoapement frame normally occupies the position shown in Figs. 13 and 14, being held in this position by means of a contractile spring 19. To rock the frame for the purpose of releasing the lowermost bobbin, a bell crank 'Il is pvoted in a suitable bearing on the bracket 69 and has one arm connected with the frame by means of a link 12 and its other arm pivoted to an actuating bar 13. The latter extends lengthwise of the machine, being common to all of the units, and is arranged for actuation by a cam 14 (Fig. 13) on the main cam shaft 21 and having a follower 15 fast on the rock shaft 16 extending transversely of the machine below the main frame member 4. The rock shaft carries at its forward end an arm 11 connected by a link 18 to the actuating bar 13. To prevent breakage of the parts in case any of the escapement fingers fail properly to clear the bobbins, the link 12 is preferably made compressible. As shown in Fig. 14 it consists of two telescoping parts 19 and B9 and a compression spring 8| operative in the movement of the actuating bar 13 and bell crank 1| to transmit a yieldable force to the rocking frame.

Denning slide Upon the release ci empty bobbins from the magazines D through the operation of their escapement devices, the bobbins drop onto underlying carriers on donning slides (Figs. 3 and 13). Each carrier is mounted for movement from a normal position beneath its magazine rearwardly to introduce the empty bobbin thereon into the chuck 1 of the spindle supporting means A preliminary to the movement of the tail center 9 by its cam 2E into holding engagement with the tip nected by a web 89 to form a yoke to receive the core of the bobbin adjacent the butt end thereof, the ngers being beveled to engage with the shoulders b' formed at the butt end of the bobbin (Fig, 3). The member B5 is pivotally mounted upon a block 9U secured to the slide plate 93 and is yieldably held in upright position by a torsion spring 9|, the lower edge of the web 89 engaging the top of the block to limit movement of the member by this spring. To support the rear end of the slide, the bar B2 is extended as shown in Fig. 15, a suitable bearing therefor being provided on the gear housing 9.

To reciprocate the slide, an actuating arm 92 mounted upon a rock shaft 93 has its upper end pivotally connected to the slide bar 82. Said rock shaft is common to all of the units and on its extreme right-hand end (Fig. 22) it carries a cam follower 94 engaging with a cam 95 fast on the main cam shaft 21.

The

bobbin carrying members

94 and 85 of the donning slide are yieldably mounted so as to permit return movement of the slide after the tail center has been swung into its operating or holding position relative to the new bobbin. In the donning motion, this tail center is held by its cam 26 in an elevated or withdrawn position so that it does not interfere with the advance of the slide and the empty bobbin thereon. In order further to insure against damage to the parts, the actuating arm 92 is yieldably held in a predetermined position on the shaft 93 by means oi a spring 96 acting to permit rocking motion of the shaft independently of the slide in the event that the latter should be interrupted in its donning movement. As seen in Fig. l5, the spring 96 normally tends to hold in interengagement with each other two

abutments

91 and 98 respectively rigid with the actuating arm 92 and an arm 99 fast upon the rock shaft 99.

Fastening strand to new bobbin Movable with the donning slide E is the means F adapted to position and hold the strand for engagement by the butt end of the empty bobbin as it is introduced into the chuck 1. In this connection, it will be understood that the strand is extended downwardly from the guide 31 for engagement by said device either by reason of its connection with the previously wound bobbin temporarily supported by the receptacle C or because of the action of a thread positioning device to be presently described.

The means provided for this purpose comprises in the present instance a plate |99 (Figs. 15, 16 and end of the bobbin. The bobbin carrier in the present instance comprises a bar 32 (Figs. 13 to 17) slidable in ways provided in the bracket 65 (Fig. 14). To one side of the bar 32 is fastened a plate 83 on which is mounted at spaced points a pair of upright members 84 and B9 (Fig. 15), one for supporting the tip end of the bobbin and the other the butt end thereof. The member 84 is in the form of an arm having its upper end notched slightly so as to form a recess for the bobbin. This arm is yieldably held in upright position by a spring 86 and interengaging stop means 81.

The other supporting member 85 is in the present instance in the form of a sheet metal stamping providing a pair of spaced fingers BB con- 17 secured to the underside of the block 9|) and having an extended end with a V-shaped notch lill therein. Fixed to the underside of this plate is a stationary blade |0 2 and a movable shearing and clamping blade |03, the latter being inter posed between the blade |99 and the stationary blade |02. The parts are pressed together by means of a compression spring |04 surrounding a stud |05 which is anchored in the plate |09 (Fig. 17).

The movable blade |93 has rigid therewith an actuating arm |96 and positioned in the path of this linger so as to be engaged thereby in the movement of the donning slide is a stationary stop |91. As the slide advances the depending strand is positioned by the notch IBI and the shearing blade |03 actuated to sever the strand and at the same time clamp the same so as to hold it in the path of the butt end of the bobbin as the latter is inserted into the chuck 1, thereby binding the strand to the bobbin preliminary to the winding operation. As will be seen from Fig. 22, the cam 95 is so shaped that after a short dwell in its advanced position the donning slide is quickly returned to its initial or normal position beneath the empty-bobbin magazine C. Near the end of such return movementI the actuating arm of the shear blade |13 engages a second fixed stop |08 on the bracket 65 to open the shear preparatory to the next operating cycle.

Bunch builder Before the main winding operation is started, it is desirable to form upon the bobbin at the butt end thereof a small mass of yarn commonly termed a bunch for the purpose of facilitating detection in the loom shuttle of the approach of the end of the yarn supply on the shuttle. For this purpose I provide a bunch building mechanism adapted to wind a predetermined quantity of yarn onto the bobbin and including a special traverse effective only during this prelimiary operation and adapted to control the lay of the yarn whereby to insure the building up of a bunch of a size adequate for purposes of detection and yet avoid the winding of an unnecessarily large amount of yarn for this purpose.

Referring now to Fig. 18 of the drawings, this bunch building mechanism comprises a traversing pin |09 mounted on an arm IIII fast on a rock shaft I||. Loose on the shaft is a slotted crank arm ||2 constantly oscillated so long as the winding spindles are in operation by a cam ||3 acting through a follower ||4, rock shaft I I5, arm ||6 and link I I1, the latter connected with the slotted arm ||2.

oscillatory motion imparted to the crank arm I I2 is effective to rock the shaft and thereby the pin |09 depending upon the position of an arm Ila pinned to the rock shaft and adapted to engage with an arm ||9 rigid with the crank arm ||2. This motion transmitting connection is effective only for the relatively short period of time required for bunch building. times the arm ||8 is held against the arm ||9 by the action of a torsion spring |20. At other times the arm I I8 is moved out of the range of oscillation of the arm H9, by the action of a cam |2| on the main cam shaft 21. For this purpose the shaft has loose thereon a spur pinion |22 meshing with a rack bar |23 to which is connected a follower |24 bearing on the cam |2| under the action of a contractile spring |25. The pinion |22 has a lost motion connection with the rock shaft provided by an arm |26 rigid with the pinion and an arm |21 fast on the shaft.

In the relation of the parts shown in Fig. 18 the arms I8 and I9 are in abutting engagement so that the cam l |3 is effective to oscillate the traverse pin |09. When, however, the rack bar |23 is drawn downwardly by the cam I2 I, the lost motion in the connection between the pinion |22 and the rock shaft is taken up and the arm |21 then actuated to rock the shaft sufficiently to remove the arm ||8 thereon out of the range of oscillation of the arm ||9 and at the same time swing the traverse pin |09 into an elevated inoperative position (Fig. 4).

The actuating cam ||3 for the bunch building traverse is mounted upon a shaft |28 (Fig. 18) driven from the main drive shaft I2 by a speed reducing gear train |29. This gear train together with the cam and its follower are enclosed within a housing |30 (Figs. 2 and 4) providing bearings At such f 10 for the shafts ||5 and |28 and also for a shaft |28a for certain of the idler gears of the train |29. The control cam |2| and its follower together with the rack bar |23 and its connection with the rock shaft ||I are suitably enclosed Within the left-hand standard of the main frame of the machine. It will be understood that the rock shaft extends the full length of the machine and carries a traverse pin ||l9 for each of the units. As shown in Fig. 2, the torsion spring |20 is anchored to the right-hand frame standard 2.

M aiu traverse Upon the completion of the bunch building operation, the main traversing devices G are advanced from normally inactive or retracted positions relative to the Winding spindles into engagement with the running strands and thence advanced gradually with a feed motion in a direction axially of the spindles to cause the yarn to be Wound in successive layers shifting progressively to produce filling-wound bobbins. In the present instance, each of the units embodies its own traversing device, comprising principally a cylindrical cam |32 (Figs. 5 and 6) encircling the winding spindle and mounted for movement in a direction axially thereof. Said traverse cams form per se no part of the present invention, being the invention of Burt A. Peterson as set forth in his copending application, Serial No. 428,993, led January 31, 1942, now Patent No. 2,326,307, issued August 10, 1943. Briefly stated, each of said cams provides two oppositely sloping cam surfaces |33 and |34 moved successively into engagement with the running strand as an incident to the continuous rotary motion of the cam. At a point immediately above each bobbin being wound, the strand is guided by a finger |35 (Fig. 9) acting to restrain the strand against lateral motion as the cam surfaces engage the same to shift it alternately in opposite directions on the axis of the bobbln. The finger |35 is mounted on the rail adjacent the traversing cam and somewhat below the guide 31 which is mounted on a bracket |35.

The cams |32 for the several units are mounted upon a rail I 36 (Fig. 21) extending the full length of the machine and having rigid with its opposite ends slide plates |31 guided in ways |38 formed on the inner sides of the end standards and 2. The rail is of channel section except that at spaced points it is constructed to provide bearing blocks |39 in which the cams are rotatably mounted. In the present instance, each of the cams has fixed on its rear end portion (Fig. 5) a bearing sleeve |43 supported in a bearing block |39 by an antifriction bearing |4|. Suitable clamp means |42 is provided for removably securing the traverse cams in position in the bearing blocks |39.

' Continuous rotary movement is imparted to the several traverse cams from a common drive shaft |43 (Fig. 2). For this purpose, worm gears |44 are ixed on the shaft |43 at spaced intervals corresponding to the lateral spacing of the units. Each of said gears meshes with a Worm |45 rigid with a bearing sleeve |40. To enclose this worm gearing and to support the shaft |43, suitable housings |43 are mounted upon each of the bearing blocks |39 of the channel rail |36.

During the winding operation a gradual feeding motion is imparted to the cam supporting rail |36 by means of a driven shaft |41 (Fig. 21); and at the end of the winding1 operation the feed is interrupted and the rail is returned rapidly by