US2136515A - Machine for winding yarn and the like - Google Patents

Description

Nov. 15, 1938. c. MARSDEN 2,136,515

MACHINE FOR WINDING YARN AND THE LIKE CHARLES MARSDEN N I ama- Filed May 25, 1955 v 2 Shets-$hef 1 :1- QIIIN' .Qi 3 J 3 z ,2; *es LN jg 5 5 g z m W 1 A. n l:@[:

\ I l a 1 I I i I 2 l I v a $4 a" 6 g E w 1 Kg g I m i \NVENTOR J t g ATTORNEY Nov. 15, 1938. 'c. MARSDEN 2,136,515

MACHINE FOR WINDING YARN AND THE LIKE Filed May 25, 1956 2 Sheets-Sheet 2 INVENTOR CHARLES MARS DEN BY. Q

ATTORNEY Patented Nov. 15, 1938 UNITED STATES PATENT OFFICE MACHINE FOR WINDING YARN AND THE LIKE Charles, Marsden, Ahmedabad, Bombay Presidency, India Application May 25, 1936, Serial No. 81,741 In Great Britain June 18, 1935 This invention is for improvements in ma 2 Claims.

chines for winding yarn and the like in conical chases on cops or bobbins.

One object of the invention is to provide a machine which will wind itthe yarn or the like in such a way as to produce a firm, non-shattering chase.

Another object is to increase the amount of yarn orthe like which can be wound into a given package of predetermined diameter.

A further object is to provide cam for effecting relative reciprocation betweenthe thread-guide and the windingspindle to traverse the yarn or the like longitudinally of the latter, which cam has a cam-track whereof the feed and return portions are of different length, and the invention is characterized by the combination of features that (a) the traverse-cam is geared to the winding spindle to rotate at a speed which is in constant proportion'tothe speed of rotation of the latter and (b) the cam has its cam-track so formed that the speed of traverse in each direction varies along the stroke of the cam. By this combination of features it is ensured that during each portion of the traverse the turns of yarn or the like are spread out at some points and laid more closely together at others in a predetermined manner.

By winding the yarn or the like in this way a firm non-shattering chase can be produced, and in the case where the package is built up on a plain tube'the heel can be produced more quickly than usual and more yarn or the like can be incorporated in a package of given dimensions.

It is preferred that the In carrying out the invention the traverse-cam may be so arranged that the shorter portion of its cam-track serves to traverse the yarn or the like from the largest to: the smallest .diameters of the conical chases. ducing a firm package.

This will. assist in pro- There will now be described by way of example only and with reference to the accompany-- ing drawings a preferred form of winding machine in accordance with the invention.

In the drawings- Figures 1a and 1b show the winding machine in plan view with certain parts omitted;

Figure 2 is a view in elevation and partly in cross-section of the portion of the machine shown in Figure 1a; and

Figure 3 isa diagrammaticview illustrating the shape of the traverse-cam.

Like reference numerals indicate like parts throughout the drawings.

As shown in the drawings, the machine comprises a main frame ID- having bearings II for a tubular clutch-member l2 and a spindle l3 which lies within it. The tube 12 carries a. grooved-wheel M which abuts against a spring l5, the other end of which engages a collar l6 aflixed to the spindle [3. The worm l'l forms part of a tube which is also affixed to the spindle l3.

Rotatably mounted on the left-hand end of the spindle I3 is a pulley I9 having a conical face to co-operate with a clutch-member 20 formed integrally with the tube l2. The outer end of the spindle I3 is supported in a bracket 2|.

The right-hand end of the tube I2 is formed with dogs 22 adapted to engage with corresponding slots in the collar l6 whereby a driving-com nection is established between the tube l2 and the collar it so that when the clutch-member 28 is in frictional engagement with the pulley l9, rotation of the pulley drives the spindle l3. 7

The right-hand end of the spindle carries spring-fingers 23 to engage the end 24 of a'copholder; the other end 25 of the cop-holder being supported by a centering-spindle 26 mounted in bearings in a plunger 21 pressed towards the cop by means of a spring 28 and slidable in a guide 29. The plunger 21 terminates in a knob 39 whereby it may be retracted manually.

The worm I! (see Figure 2) engages and drives a worm-wheel 3| having cut in its face (as described in my co-pending application Serial No. 81,742 of even date herewith) a cam-track of two portions 32 and 33. The track is engaged by a follower 34 on the shorter arm 35 of a bellcrank lever 35, 36, pivoted. to the frame at 31. The arm 36 is pivoted to a link 38 which is in turn pivoted at 39 to a traverse-rod 40 slidable in a tubular guide 4| and in a bush 42. It will be seen that the worm drive ensures that the cam 32, 33 is geared to the. winding spindle to rotate at a speed which is in constant proportion to the speed of rotation of the latter.

The traverse rod 40 carries a screw-threaded extension 43 whereon are mounted a progression-wheel 58 and a stirrup 6| supporting the thread-guide shown at 62. The progressionwheel 58 has a hub 59 freely slidable along the extension 43 and embraced by the stirrup 6|. A resilient wire 50 on the progression-wheel 58 en-- gages the screwthreads of the extension 43. The latter is coupled to the traverse rod 40 by a pin 48 engaging in a slot 41 in a. former bar 46, the latter being arranged to be received in a diametral slot in the extension 43 and having a screwthreaded end 44 whereby it is secured to the traverse rod 40 and retained in place by a locknut 45. The other end of the screw-threaded rod 43 ismounted in a universal joint 54 in a sleeve 55 attached to a bracket 51 which is an extension from the main frame Ill.

The former bar 46 has an inclined and slightly concave profile adapted to engage the interior of the hub 59 of the progression-wheel 58 when the progression-wheel is at the left-hand end of the screw-threaded rod 43. The engagement between the hub 59 and the former bar 45 rocks the screw-threaded extension 43 about the universal joint 54 to bring the periphery of the pro gressiomwheel 58 towards the cop-holder for building the heel on the cop at the commencement of the winding operation. The said rocking of the rod 43 takes place against the action of a tension spring 49 acting on the pin 48. For initial adjustment of the rod 43 towards or away from the winding spindle a screw 52 is provided acting on the pin 48. The former bar 45 and the associated parts are constructed as described in co-pending application Serial No. 33,187 filed 25th July, 1935.

The traverse-cam 32, 33 is of a special shape as is illustrated in Figure 3. Its shorter portion 33 occupies approximately of a complete rotation so that its longer portion 32 has more than three times and nearly four times the angular extent of the shorter portion 33. Also each of the portions 32 and 33 of the cam has a profile somewhat steeper than that of an Archimedean spiral. For comparison the chain lines shown at E3 and 74 in Figure 3 illustrate the profile of Archimedean spirals of the same throw and angular extent as the cam portions 32 and 33. That is to say the spirals l3 and T4 are so formed that through a given angle of movement there is always the same extent of radial throw. With the cam portions 32 and 33, however, the extent of radial throw over a given angle of movement increases gradually from the lowest point of the cam shown at T5 to the highest point shown at '46. This is shown more clearly by the markings given on a radius line 11 passing through the point '56. These markings are arrived at by dividing the angle subtended by each cam portion and 33 into equal parts by radius lines i8, i9 and describing, about the axis of rotation of the cam, concentric circles 80, 8|, 82 83 passing respectively through the lowest point '15 of the cam and the points at which the radius lines F3 and "i9 intersect the cam profile 32, 33. The cam is so designed that the distances between adjacent markings shown on the radius line 11 increase from the center of the cam radially outwardly by amounts corresponding to the terms of a geometrical progression. Thus, if the radius of the circle 80 is represented by R, the

radii of the circles BI, 82, 83 etc. may be represented by etc., or in other words, the intersections of the circles 80 to 89 with the radius line H mark off together with the point 16 ten distances representing the radial cam-throws of the ten divisions of the cam profile and these distances are equal to y+b, y+2b, y+4b y+512b. By subtracting each of these distances from its succeeding distance, there is obtained the following geometrical series having the common ratio 2:b, 2b, 4b, 8b 25622 The symbols R, 3 and b have been given for convenience for their values may be varied, as may also be the common ratio, to suit different conditions of winding, if desired. The profiles of the cam portions 32 and 33 are so shaped as to give, adjacent to the highest point 16 of the cam, a speed of traverse which is approximately three times that adjacent to the lowest point of the cam.

When it is required to build a cop 63 on a plain cylindrical tube the progression-wheel 58 is moved to its extreme left-hand position (the spring 60 being released for this purpose) until the hub 59 rides along the former bar 46 and. consequently rocks the screw-threaded rod 43 to bring the progression-wheel towards the Winding spindle. With the periphery of the progression-wheel 58 just touching the bare cop tube the machine is set in motion and winding commences. The spindle l3 rotates in the direction of the arrow shown in Figure 1a so that the worm wheel 3| is driven clockwise as seen in Figure 2. The shape of the cam-track 32, 33 causes the traverse rod to be moved outwards comparatively quickly owing to the short length and comparatively steep angle of the spiral 33 but the inward movement of the traverse rod is performed at a much slower speed owing to the greater length and more gradual slope of the spiral 32. During the inward movement of the traverse rod 40 the turns of yarn are, therefore, laid more closely together. The inward traversing movement of the traverse rod may thus be termed the main or laying-on traverse. During the outward movement of the traverse rod the turns of yarn are spaced relatively widely apart and therefore at a greater angle to the axis of the winding spindle. The widely spaced turns of yarn laid during the outward movement of the traverse rod cross the turns of the preceding layer approximately at right angles and serve to bind them in place.

During the winding operation the winding spindie [3 rotates at a constant or approximately constant speed and the movement of the traverse rod 45 in each direction is gradually varied so that the highest speed of traverse occurs when the traverse rod is at a point adjacent to its outer extreme of travel. The variation of speed in the main or laying-on traverse causes the turns of yarn to be closer together at the heel of the cop than towards the nose end and thereby serves to build up the heel of the package more quickly than would otherwise happen. The building of the heel is controlled by the progression-wheel 58 which acts, in known manner, to advance the point of winding-on from left to right as seen in Figure 1b. At the commencement of the winding operation the progressionwheel 58 is displaced to a position adjacent to the yarn support by the action of the former bar 46, and as layers of yarn are laid on the yarn support, the periphery of the wheel 58 makes contact with them and is rotated so as to be moved progressively towards the right as seen in Figure 1b. The stroke of the thread-guide 62 is thereby also progressively displaced. As the hub 59 of the progression-wheel travels to the right the screw-threaded rod 43 gradually returns under the action of its spring 49 into a position parallel with the winding spindle. When it has reached this position the progressive displacement of the initial layers of yarn has resulted in the building of the heel. Subsequently the yarn is wound in conical chases to form a substantially cylindrical package with coned ends. During the building of the heel the variation in the speed of the inward movement of the traverse rod 40 causes a greater mass of yarn to be laid at the left-hand end of each layer as seen in Figure 1b and consequently the building of the heel is accelerated. It follows from arapid building of the heel that the quantity of yarn which can be wound into a package of given diameter and length is increased. After the heel has been formed the variations in the speeds of the inward and outward movements of the traverse rod 40 have no effect on the shape of the cop, but due to the Winding on of a greater amount of yarn at the base than at the nose of each chase the operation of the progression wheel is made more certain. The change in speed of the laying-on traverse due to the special formation of the cam portion 32 also assists in producing a firm package, due to the spreading out of the turns of yarn towards the nose of the chase, the tendency is to wind a tight nose which will support the rearward layers or turns and prevent them from "sloughing off.

During the movement of the traverse rod by the cam portion 33 the yarn is laid in more open formation and these open wound turns serve to bind the previous layer in place. The function of the change in speed in the traverse rod due to the special formation of the cam portion 33 is as follows. To preserve a uniform crossing angle between the turns laid during the quick return and the turns laid in the preceding layer.

The laying-on or slow traverse and quick return traverses can take place in the opposite directions to those I have provided.

The provision of a concave profile to the former bar 46 has the effect of producing a convex shape to the heel of the cop.

It is found possible with the variable speeds of traverse provided by the cam 32, 33 still to obtain a firm tight wind even though the profile of the former bar is concave.

When the cop has been fully built the progression-wheel 58 operates suitable devices, such as those described in my co-pending application Serial No. 33,187, to release the cone 2!] from the pulley l9 and thereby interrupt the drive of the machine.

In the method of operation described above the screw 52 is so set that after the progression- Wheel 58 parts company with the former bar 46, as in the position shown in Figure lb, the screwthreaded rod 43 lies parallel to the winding spindle and, as shown in the drawings, co-axially with the traverse rod 40. However, the parts may be differently arranged so as to give any desired shape to the heel of the cop. The

parts may also be arranged so as to wind on to a pirn having a preformed conical end on which the conical chases of yarn are laid. This arrangement can be secured by moving the spindle I3 to the right (as viewed in Figures 1a. and 2) relatively to the tube 12, collar 16 and worm H. The endwise movement of the spindle may be permitted by releasing appropriate grub-screws which are subsequently re-tightened. The extent of movement of the spindle need only be sufficient to provide that, at the commencement of the winding operation, the hub 59 of the progression-Wheel 58 is out of engagement with the former bar 46.

It is to be understood that the invention is not restricted to the precise constructional details shown in the drawings. An alternative way of adapting the machine to wind on to a coneended pirn is to turn the former bar 46 to a suitable extent about the axis of the traverse rod 40.

I claim:-

1. In a machine for winding strand material in conical chases having means for rotatably supporting a package, means for rotating the package, traverse-mechanism for traversing the strand material longitudinally of the package, gearing positively coupling said traverse-mechanism to the package-rotating means, and a progression device for progressing the traverseroke along the length of the package, the combination comprising a rotatable traverse cam, and a track on said cam having feed and return portions of different lengths and having each of said portions of the track so formed that the radial cam-throws of a series of divisions of the camtrack subtending equal angles at the axis of the cam are so correlated that the differences in radial cam-throw between each successive adjacent pair of cam-track divisions increase in accordance with a geometrical progression towards that point on the cam-track which corresponds to the feed of the strand material to the nose of the chase.

2. In a machine for winding strand material in conical chases having a rotatable winding spindle, traverse-mechanism for traversing the strand longitudinally of the winding spindle, gearing positively coupling said traverse-mechanism to the winding spindle, and. traverse-progression means for advancing the traverse-stroke along the winding spindle, the combination comprising a rotatable traverse cam, and a cam-track on said cam having feed and return portions which are of different lengths with the angular extent of the longer portion at least three times that of the shorter portion and which are each formed to give a gradually increasing speed of traverse towards the nose of the chase with a traverse speed at the nose of the chase approximately three times that at the base of the chase and which portions are each so formed that the radial cam-throws of a series of divisions of the cam-track subtending equal angles at the axis of the cam are so correlated that the differences in radial cam-throw between each successive adjacent pair of cam-track divisions increase in accordance with a geometrical progression towards that point on the cam-track which corresponds to the feed of the strand material to the nose of the chase.

CHARLES MARSDEN.

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