US2436559A - Yarn winding mechanism - Google Patents

Description

Feb. 24, 1948.

H. w. DOUGHTY, JR

YARN WINDING MECHANISM 2 Sheets-Sheet 1 Filed May 4, 1945 Il llnll L 2 Sheets-Sheet 2 H. w. DOUGHTY, JR

. YARN WI NDING MECHANISM Filed May 4, 1945 Feb. 24, 1948.

HTTDRNEY Patented Feb. 24, 1948 YARN WINDING MECHANISM Howard W. Doughty, Jr., ,Westfield, Mass, as signor to Foster Machine Company, Westfield, Mass., a corporation of Massachusetts Application May 4, 1945, Serial No. 591,988 In Great Britain May 5, 1944 23 Claims. 1

a The present invention relates to new and useful improvements in yarn winding mechanisms particularly adapted for the winding of packages of yarn or thread upon a core and is more particularly concerned with yarn guide controlling means for such winding mechanisms.

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom, or may be learned by practice with the invention, the same being realized and attained by means of the instrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a part hereof, illustrate embodiments of the invention, and together with the description, serve to explain the principles of the invention.

Of the drawings:

Figure 1 is a side elevation of a typical and illustrative embodiment of the present invention, certain of the conventional driving and supporting I parts being broken away and omitted;

Figure 2 is an end elevation of the apparatus shown in Fig. 1;

Figure 3 is a cross-sectional view taken on the lines 33 of Figure 1; and

Figure 4 is a sectional view of a cone package,

which can be wound according to the present invention and by using the apparatus of Figures 1, 2 and 3.

The present invention has for its object the provision of a novel and improved yarn winding mechanism for winding packages of yarn or thread which can be adapted simply and easily for winding a variety of packages.

A further object of the invention is to provide yarn guide control means for a Winding machine which are adapted to form a package of yarn of predetermined characteristics whereby a greatly improved yarn package may be produced, according to the present invention.

A still further object is to provide means for controlling the winding of a package, in a yarn winding mechanism, so that fine threads such as nylon, rayon and the like, may be formed into a package under controlled tension and lay of the yarn or thread, to produce a more satisfac tory package, and one which may be largenif desired.

The package of yarn produced in accordance on and rotated about a fixed axis, means are provided for rotating the cylindrical or conical core at a relatively high speed and the traverse of the yarn or thread along the length "of the rotating core is controlled by thread guiding means adapted to reciprocate relative to the core, in a conventional manner. In contact with the surface of the package being wound upon the core and mounted on a swinging frame is an idler roller of length substantially that of the core so that, as the diameter of the package increases, the roller will be moved away from the core axis and yet maintain contact'with the package surface.

The means' for reciprocating the thread guide comprise a continuous cam member driven from the source of rotation for the package core and driving a cam follower having influence on the yarn guide means in a preselected path of traverse longitudinally of the package core. Normally, a continuous cam is used for this purpose, but, in accordance with one feature of the present invention, anaccelerated cam is utilized of such form that the speed of guide traverse over the length of the package will increase from base to the nose and will decrease from the nose to the base. Preferably, an acceleration factor of 111% is utilized for this cam contour whereby optimum results in the condition of the finished packages may be attained.

According to another feature of the present invention, means are provided for shifting the traverse of the yarn guide toward the nose of the packwith the teaching of the present invention is of definitely improved formation over packages hereage, as the package builds up, in a substantially geometrical ratio with respect to the increasing size of the package. To accomplish this, means operated by the swinging of the frame carrying the yarn guide, as caused by increased diameter of the package acting on the idler roller, are

adapted to act, preferably through the medium of whorls and cooperating shaped slots, in such manner as to shift the main traverse cam bodily longitudinally of its supporting cam shaft whereby to change the relative position of the cam follower coactlng therewith which cam follower causes the traversing guide to be progressively,

placed, according to this invention, and are so associated with their cooperating whorls that the shape of the slot may influence the degree of'acceleration of yarn guide traverse that is obtained, whereby a variety of differentcacceleration cycles may be obtained, by utilizing a plurality of substitute slots.

The present invention is concerned with providing a conical package as the finished article, and one of the major factors which influence the building up of a satisfactory conical package is the relative angles of lay of yarn on the package as it increases in size and diameter, the angle of lay being more obtuse atthe base, or larger end, of the conical package andbeing sharper or more acute at theznose or smallenend of the package, even when the ratio of windremains the same. Furthermore, as the conical package increases in size and diameter, the relative angles of lay of the yarn change, and there is alesser change ofangularlty at the base of the cone from an empty condition to a full condition than the change of angularity at the nose, which is quite a large change from empty to full position on the cone. Thus, in producing a conical package, the angularity of lay of the yarn during winding exerts a great influence on the condition of the finished package, and, in accordance with a feature of this invention, there are provided means whereby this deleterious effect of ratios of angularity of yarn lay are overcome, whereby to produce a superior package in many respects, as hereinafter brought out. a

Accordingly, the shifting of the traverse of the yarn guide is carried out in a progressive increment of movement in a substantially geometrical progression determined by the progressive increase in angularity of yarn lay at the nose of the conical package. To this end, the shape of the slots'may be so formed as to give this desired increment of movement, namely the slots may be so shaped that their effect on the yarn guide traverse cycle causes movements in a geometrical progression, in a small but progressive increment of movement, at a predetermined relationship to increase of yarn lay angularity at the nose end of the package to overcome the detrimental effects of such increase of angularity, during the building up of the package.

In this preferred action, with the slots so shapedto compensate for the stated increased angle of lay of the yarn at the nose end of the package, and with the traverse cam above described having a 11% acceleration factor, it is possible to produce a final wound package of yarn having, besides other advantages, a concave bevelled nose formation and a convex rounded base end formation as hereinafter specified.

By using other shapes for said slots, other formations of packages can be produced, as desired, the specified package, being preferred, but not limitive,

By practicing this invention, a new and improved form of yarn package is obtained having many advantages, as hereinafter brought out.

It will be understood that the foregoing general description and the following detailed description as well are exemplary and explanatory of the invention but are not restrictive thereof.

Referring now to the drawings, a main stationary housing 1 supports the rotatable driving spindle 2 and a rotatable shaft 3 upon which 15 g fastened the main traverse cam 4 connected to reciprocate the thread guide 5 carried by a guideway frame 6 which is conventionally mounted for swinging about the shaft 3, against the tension of a suitable spring (not shown).

Thread guide 5 is connected for reciprocation by the main traverse cam 4 through the traverse tube 9 which is slidably mounted on a guide rod ill carried on the swinging frame 6. At one end, tube 9 carried a cam follower II which runs in cam groove l2, while at its other end it is connected to a bracket l3 which supports thread guide 5.

Winding spindle shaft housing 14 is mounted on casing l and supports spindle drive shaft 2 in suitable bearings. Shaft 2 is rotated from the electric motor l5 through a belt l6 and a pulley l1, and in turn rotates shaft 3 in a directly proportional speed and in timed relation through belt l8, pulleys l9 and 20 and gears 21 and 22. Thus, as the spindle shaft 2 rotates to cause rotation of core 23 thereon and winding of a package 24 (Figure 2) on the core, the cam 4 will'be rotated by shaft 3 to cause a predetermined cyclic reciprocation of tube 9 and thus thread guide 5.

An idler roller 26 is mounted to rotate on swinging frame 6 and bears against the periphery of core 23, having a length substantially as long as core 23 and being mounted to maintain peripheral contact therewith during winding and' to maintain its axis substantially parallel to the adjacent surface of the package so that, as the package 24 builds up on core 23, the roller 26 will be urged away from the rotational axis of core 23 and will carry swinging frame 6 with it, about its pivot on shaft 3 whereby to compensate for changes caused by increase of package diameters in the conventional manner.

In accordance with one feature of the present invention means are provided for progressing the main traverse cam forward during the building of package 24 in order to overcome the detrimental efiects of increasing angle of yarn lay, whereby to produce a form of package heretofore unobtainable and having the advantages hereinbefore described.

To this end, main traverse earn 4 is designed to move freely longitudinally on shaft 3 by means of a bushing 21 arranged internally of hub 25 of cam 4 and rotational motion is transmitted to cam 4 from shaft 3 through keys 29 arranged in keyways 33 in the bearing 21 while still permitting cam 4 to slide on the shaft 3 longitudinally.

A ball bearing 32 is fixedly mounted on one end of bushing 21 and a collar 33 is fast on the outer race of ball bearing 32. Attached to the collar 33, as by screws 34, are a pair of slotted forming plates 35, these embracing collar 33 as shown, and, in the illustrated formbeing provided each with an identical curved slot 36. The specific shape of these slots 36 can be varied to suit the desired function of acceleration of traverse to be accomplished by the device, as hereinafter disclosed.

As best shown in Figure 3, shaft 3 is rotatably supported at its forward end by a bushing 31 within a hub 38 forming a part of casing I, this bushing 31 extending externally of casing l the extension forming the mounting for hub 4|] of swinging frame 6. Bushing 31 is freely rotatable about shaft 3 and is attached to hub 40 by a set 76 screw 4|, whereby it shares movements of swinging frame 3 around the axis of shaft 3. At its end inside casing l, bushing 3'! terminates in a flange 42 of sufiicient width to accommodate a pair of studs 43 each carrying at its end a whorl 44 which is adapted to cooperate with a slot 36, The studs 43 are directly opposite each other across the axis of shaft 3, so as to align whorls 44 with slots 36 of the forming plates 35. Thus, as frame 6 swings around the axis of shaft 3 during building up of the package, bushing 3! will move therewith rotationally around shaft 3 carrying with it studs 43 and whorls 44 which latter will cause a longitudinal movement of main traverse cam 4 with respect to shaft 3 through the slots 36. In order to prevent the outer race of bearing 32 with its attached collar 33 from rotating with main traverse cam 4, a pin 46 is affixed to casing I, as by nuts 41 and engages a slot 48 in a plate 49 attached to collar 33. Accordingly, sincev the path which whorls 44 will follow in slots 36 progressively under swinging movements of frame 6 is at right angles to the axis of cam shaft 3, the main traverse cam will be moved longitudinally of shaft 3 and will thus change the relative position of cam follower II in cam groove l2, thereby accelerating the traversing movements of the guide 5 in a predetermined manner which is regulated by the shape of slots 36 in forming plates 35. For example, a straight line formation for slots 36 will result in a forward movement on the main traverse cam 4 in direct proportion to the increase of diameter of the package 24 as it builds up, while a curved formation for the slots, as illustrated, will give any desired rate of acceleration in main traverse cam movement over the rate of diameter change of the package as it builds up. Since forming plates 35 are readily demountable by removal of screws 34 from collar 33, it is obvious that a rapid and easy change from one form of acceleration to another can be obtained by replacing the plates 35 with others having a different contour for the slots 36.

It will be readily realized that the means hereinbefore described for shifting the traverse of the guide 5 as the package builds up will result in a shift toward the nose in an increment of movement progressively and in a substantially geometrical ratio with respect to the increasing size of the package. By this means therefore it is possible to obtain a final package having many advantages over prior packages. Plates 35 preferably have their slots 36 formed in such a man-' ner that the increase of angularity of lay of the yarn at the nose of the package, heretofore specified, will be compensated for, to provide desirable characteristics to the package when wound. To this end, in accordance with one feature of the invention, the shape of slots 36 will be such that the yarn guide 5 will be shifted in an increment of movement progressively toward the nose of the package in substantially a geometrical progression determined by the progressive increase of angularity of yarn lay at the nose of the package, as it builds up. To this specific end, it is only necessary to calculate the angularity changes of yarn lay at the nose of the package, and to so shape slots 36 that the increments of movements given to guide 5 progressively thereby, compensate for such angularity changes.

It has also been discovered that in order to provide a package of the nature of package 50 of Figure 4 with a maximum uniformity of density and of lay of the yarn on thepackage, a definite acceleration and deceleration cycle of movement vention to provide for for the traversing guide 5 is required and accordingly it is a further feature of the present inthis cycle to accomplish the desired purpose.

To this end, main traverse cam 4 has its cam groove I2 so cut as toaccelerate the speed of the traverse of guide 5 at the nose of the package, thereby laying less yarn toward the nose to compensate for the greater rate of diameter increase occurring at the smallest diameter end of the package, which is the nose end and, similarly, to decelerate the speed of traverse of guide 5 from nose to base. A

It has been found that the optimum for obtaining the desired results, when using the mechanism hereinbefore described, is a, cam which has an acceleration factor, from base to nose, of a ratio of 1:1 and the decrease of guide speed from nose to base is of a ratio of 1 :1.

Accordingly, by so designing cam groove l2 that this ratio of speed increase and decrease in a cycle movement is obtained and when using the cam accelerating mechanism of Figures 13, it is possible to obtain a package of yarn of larger than usual diameter; of lesser uncontrollable tensions and tension variability; of greatly improved redraw characteristics with no hard raised lips; of such shape that removal of fallen wraps of yarn which sometimes occur on redraw is easy; of uniform density; and of better general condition.

When using the special cam above defined having an acceleration factor of 1:1 /8, together with slots 36 for plates 35 shaped, as hereinbefore described as preferred, to compensate for progressive changes in angularity of lay ofyarn at the nose end of the package, it is possible to obtain a form of wound package of much superior form. In Figure 4, this form of package is illustrated.

The package 50 is characterized by a concave bevelled nose SI and a convex base 52, thus providing a greatly improved package with definite advantages on redrawing the yarn, for subsequent use.

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departures may be made therefrom vention and without sacrificing its chief advantages.

What is claimed is:

1. In a yarn winding mechanism, the combination with a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, said traversing means including means for accelerating the guide as it is moved towards the nose of the core and for decelerating the guide as it is moved away from the nose of the core.

2. In a yarn windin mechanism including a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up,

the combination of, means for traversing said guide in timed relation to'the rotation of the core, said traversing means including means for accelerating the guide as it is moved towards the nose of the core and for decelerating the guide as it is moved away from the nose of the core, and means for shifting the traverse of the guide toward the nose a substantially geometrical ratio with respect to the increasing size of the package, as the package builds up.

3. In a yarn winding mechanism the combination with a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and be tween which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds upand being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, and means for shifting the traverse of the guide toward the nose a substantially geometrical ratio with respect to the increasingsize of the package as the package builds up 4. In a yarn winding mechanism, the combination with a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, said traversing means including means for accelerating the guide as it is moved towards the nose of the core and for decelerating the guide as it is moved away from the nose of the core,

said acceleration being in a ratio of 1:1 and said deceleration being in a ratio of 1 /821.

5. In a yarn Winding mechanism, the combination with a rotatable spindle to receive a. package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, said traversing means including means for accelerating the guide as it is moved toward the nose of the core and for decelerating the guide as it is moved away from the nose of the core, said acceleration being in a ratio of 1 1 -6. In a yarn winding mechanism, the combination with a rotatable spindle to receive a package core on which yarn is to bewound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent suriace of the package as the package builds up; oi means for traversing the guide in timed relation to the rotation of the core, said traversing means including means for accelerating the guide as'it. is moved toward the nose of the core and for decelerating the guide as it is moved away from the nose of the core, comprising a continuous cam groove having a 1:1 acceleration curve with which cooperates a. cam follower operatively connected to said guide.

7. In a yarn winding mechanism including a rotatable spindle to receive a package core on which yarn is to be wound, a, yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length or the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted t maintain its axis substantially parallel to the adjacent surface of the package as the package builds up, the

combination of, means for traversing said guide in timed relation to the rotation of the core, said traversing means including means for accelerating the guide as it is moved towards the nose of the core, said acceleration being in a ratio of 121 ,1 and for decelerating the guide as it is moved away from the nose of the core, said deceleration being in a ratio of 1 /511, and means for shifting the traverse of the guide toward the nose at substantially geometrical ratio with respect to the increasingsize of the package, as the package builds up.

8. In a yarn winding mechanism the combination with a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package bulids up; of means for traversing the guide in timed relation to the rotation of the core, and means for shifting the traverse of the guide toward the nose a substantially geometrical ratio with respect to the increasing size of the package as the package builds up, said shifting traverse means including a rotating continuous cam and a cam follower and said shifting means including means for longitudinally moving the cam relatively to its follower during its rotation, in an amount controlled by the increase of diameter of the package as it builds up.

9. In a yarn winding mechanism including a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up, the combination of, means for traversing said guide in timed relation to the rotation of the core, said traversing means including means for accelerating the guide as it is moved toward the nose of the core, said acceleration being in a ratio of 1:1/;;, and for decelerating the guide as it is moved away from the nose of the core, said deceleration being in a ratio of 1 /8 :1, and means for shifting the traverse of the guide toward the nose a substantially geometrical ratio with respect to the increasing size of the package, as the package builds up, said shifting traverse means including a rotating continuous cam and a cam follower and said shifting means including means for longitudinally moving the cam relatively to its follower during its rotation, in an amount controlled by the increase of diameter of the package as it builds up.

10. In a yarn winding mechanism the combination with a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide,

said roller being movable away from thecore as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, comprising a continuous cam having a cam groove in which a follower driving the traversing guide rides, and means for shifting the traverse of the guide toward the nose as the package builds up comprising means to translate the movements of the roller away from the package into a lateral progressive thrust on the cam in order to progressively change the relative position of the cam follower in the cam groove in accordance with the progressive increase in diameter of the package.

- 11. In a yarn winding mechanism the combination with a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to com trol the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid .by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, comprising a continuous cam having a cam groove in which a follower driving the traversing guide rides, and means for shifting the traverse of the guide toward the nose as the package builds up comprising means to translate the movements of the roller away from the package into a lateral progressive thrust on the cam in order to progressively change the relative position of the cam follower in the cam groove in accordance with the progressive increase in diameter of the package, said translating means comprising a plurality of whorls rotating with the roller about its pivotal axis and a plurality of slotted plates, one for each whorl, attached to the cam and causing it to be moved longitudinally and relative to its cam follower by the progressive axial thrust applied thereto by the plates as the whorls ride within the slots of said plates.

12. Yarn winding mechanism comprising in combination a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of the yarn thereon, an idler roller extending at least the length of maximum yarn traverse, said roller being pivoted to be movable 10 away from the core as the package builds up, means including a continuous cam and a follower in the cam groove thereof for reciprocating the guide in timed relation to the rotation of the core, a pair of whorls moving radially with the roller as this is moved around its pivot as the package builds up, a pair of plates connected to the cam and a shaped slot in each plate in which a whorl rides, to translate the radial movements thereof into axial movements of the cam.

13. Yarn winding mechanism comprising in combination a rotatable spindle to receive a package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of the yarn thereon, an idler roller extending at least the length of maximum yarn traverse, said roller being pivoted to be movable away from the core as the-package builds up, means including a continuous cam and a follower in the cam groove thereof for reciprocating the guide in timed relation to the rotation of the core,

age core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, and means for shifting theitraverse of the guide toward the nose in a substantially geometrical ratio with respect to the increasing size of the package as the package builds up including an operating member moving about a pivot radially with the roller as this progressively is moved by diameter increase of the package, a translating member cooperating with said operating member for translating such radial movements into axial movements in direct proportion to the increase of diameter of the package.

15. In a yarn winding mechanism the combination with'a rotatable spindle to receive a package core on which yarn is to be wound. a yarn guide to be traversed along the core to control the layof yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the packagethe yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, and means'for shifting the traverse of the guide toward the nose in a substantially geometrical ratio with respect to the increasing size of the package as the package builds up including an operating member moving about a pivot radially withthe roller as this progressively is moved by diameter increase of the package, a

11 translating member coonera ing with said operating member for translating such radial movements into axial moveme ts in a predetermined rate of ac eleration of axial movements over the rate of diameter increase of the package.

16. In a. .varn win ing mechanism. the combinat on with a rotatable sp ndle to rec ive a conical packa e core on w ich varn is to be wou d, a yarn uide to be traversed along t e core to control the. l y of yarn thereon, and an idler roller extendin the le g h of the ya n traverse a d between which and the p cka e the yarn is laid by he uide. sa d rol r bei g movab e away from the core as the package b ilds up and being mounted to maintain its axis substantia ly parallel to th a jac t urface of the package as the pac a e bulds up: of means for traver i g t e gu de in timed r lation to the rotation of the core. said traver ing me ns includ ing means for accelerating the guide as it is moved toward t e nose of the core and for decelerat ng the uide as it is mov d awav from the nose of the core. and means f r sh ft ng the traverse of the u de in an i crement of movement rogressive y toward'the nose' in a. substantia ly g ometrical pro ression determi ed by the progressive increase in angulari y of the lay of the yarn at the nose end of the conical package as it builds uo.

1'7. In a yarn winding mechan sm including a rotatable spindle to receive a c ical packa e core on which yarn is to be wound. a yarn guide to be traversed along the co e to control t e lay of yarn thereon. and an indler roler extending the length of the yarn traverse and between a yarn guide to be traversed along the core to nose of the core and for decelerating the guide as which and the package the yarn is laid by the the nose of the core. and means for shifting the traverse of the gui e toward the nose in a SEP- stantially geometrical ratio with respect to the increasing size of the package, as the package builds up, said ratio being determined by the progressive increase in angularity of the lay of the yarn at the nose of the package.

18. In a, yarn winding mechanism the combination with a rotatable spindle to receive a conical package core on which yarn is to be wound. a yarn guide to be traversed along the core to control the lay of yarn thereon. and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotation of the core, and means for shifting the traverse of the guide toward the nose a progressive increment of movement in a substantially geometric progression determined by the progressive increase in angularity of the lay of the yarn at the nose end of the conical package.

19. In a yarn winding mechanism, the combination with a rotatable spindle to receive a conical package core on which yarn is to be wound,

it is moved away from the nose of the core, said acceleration being in a ratio of 1:1 and said deceleration being in a ratio of l /azl, and means for shifting the traverse of the guide in an increment of movement progressively toward the nose a substantially geometrical progression determined by the progressive increase in angularity of the lay of the yarn at the nose and of the conical package as it builds up.

20. In a yarn winding mechanism including a rotatable spindle to receive a conical package core on which yarn is to be wound, a. yarn guide to be traversed along the core to control the lay of yarn thereon, and an idler roller extending the length of the yarn traversed and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the ad- I jacent surface of the package as the package builds up, the combination of, means for traversing said guide in timed relation to the rotation of the core, said traversing means including means for accelerating the guide as itis moved towards the nose of the core, said acceleration being in a ratio of 11 /33, and for decelerating the guide as it is moved away from the nose of the core, said deceleration being in a ratio of 1%:1, and means for shifting the traverse of the guide toward the nose a progressive increment of movement in a substantially geometric progression determined by the progressive increase in anguiarity of the lay of the yarn at the nose end of the conical package.

21. In a. yarn winding mechanism the combination with a rotatable spindle to receive-a conical package core on which yarn is to be wound, a

yarn guide to be traversed along the core to conmounted tomaintain its axis substantially parallel to the adjacent surface of the package as the package builds up; of means for traversing the guide in timed relation to the rotationof the core, and means for shifting the traverse of the guide toward the nose a, substantiall geometrical ratio with respect to the increasing size of the package as the package builds up, said shif ing traverse means including a rotating continuous cam and a cam follower and said shifting means including means for longitudinally moving the cam relatively to its follower during its rotation, in a progressive increment controlled by the progressive increase in angularity of the lay of the yarn at the nose of the conical package as the package builds up.

22. Yarn winding mechanism comprising in combination a rotatable spindle to receive a conical package core on which yarn is to be wound,

a yarn guide to be traversed along the core to control the lay of the yarn thereon, an idler roller extending at least the length or maximum yarn traverse, said roller being pivoted to be movable away from the core as the package builds up, means including a continuous cam and a follower in the-cam groove thereof for reciprocating the guide in timed relation to the rotation of the core, a pair of whorls moving radially with the roller as this is mdvecl around its pivot as the package builds up, a pair- 01' plates connected to the cam and a shapedslot in each plate in which a whorl rides, to translate the radial movements thereof into axial movements of the cam, the shape of the slot in each of said plates being determined by the changes in angularity of lay of yarn at the nose of said conical package,

whereby to produce a finished package of predetermined shape at its nose and base.

23. In a, yarn winding mechanism including a rotatable spindle to receive a conical package core on which yarn is to be wound, a yarn guide to be traversed along the core to control the lay oi yarn thereon, and an idler roller extending the length of the yarn traverse and between which and the package the yarn is laid by the guide, said roller being movable away from the core as the package builds up and being mounted to maintain its axis substantially parallel to the adjacent surface of the package as the package builds up, the combination of, means for traversing said' guide in timed relation to the rotation of the core, said traversing meansincluding means for accelerating the guide in a ratio of 1:1% as it is moved toward the nose of the conical package, and means for shifting the traverse of the guide toward the nose in a progressive increment of movement by a geometrical progression determined by the progressive increase in angularity of the lay of the yarn at the nose of the conical package, as it builds up, to produce a conical package with a concave bevelled nose and a convex rounded base.

HOWARD W. DOUGHIY. JR.

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