US2283265A - Yarn winding machinery - Google Patents

Description

May 19, 1942. w. H. KIMPTON I YARN WINDING MACHINERY 2 Shets-Sheet 1 vFiled Oct. 5, 1939 iNVENTOR j u-w A-TT RN YS May 19, 194-2. w, H KIMPTON I "2,283,265

YARN- WINDING MACHINERY Filed Oct. 5, 1959 2' Sheets-Sheet'Z psi:

Patented May 19, 1942 William Harry Kimpton, England, assignor to C Spondon, near Derby, elanese Corporation of America, a corporation of Delaware Application October 3 Claims.

Thi invention relates to yarn-winding machinery, and is particularly concerned with a yarn-winding device of the type in which the collecting package is rotated by a slipping frictional drive so as to collect the yarn as fast as it is delivered to the device.

In winding devices of this kind the tension under which the yarn is wound depends upon the radius of the package at which the yarn is wound and upon the frictional torque applied to the package to cause it to rotate. Since the radius at which the yarn is wound varie from the inside to the outside of the package the tension in the yarn during winding is apt to vary also. While the variations may be in part compensated by allowing the weight of the package to give rise to the frictional torque driving the package and so to cause said torque to increase as the weight of the package increases, this compensation may beinadequate or excessive and in any case makes it difficult to control even the average value of the tension under which the yarn is wound. It is an object of the present invention to provide a winding device in which the winding tension of the yarn may be adjusted and may, moreover, be made substantially'constant throughout the windingoperation.

According to the present invention a yarnwinding device comprises two friction elements adapted to provide a yarn package, a support adapted to carry a component part of the weight of the yarn package while the remaining component only of said weight acts to press said friction elements together to provide the The arrangement is preferably such that not only is a part of the weight of the package relieved so that it does not press the friction elements together but also, as the package increases in weight, a like part also relieved, so th is relieved and the r in linear relation to age throughout the at the component part that emaining component are both the total weight of the packwinding operation. That is to say, every increment inthe weight of the pack 45 1939, Serial No. 297,653 Great Britain October 11, 1938 a slipping frictional drive for necessary driving torque.-

of the additional weight is age produces an exactly proportional (but smaller) increment,both friction elements an relieved.

in the pressure between the d in the part of the weight The carrying of part of the weight of the package otherwise than on the friction and driving means may be efiected by any convenient means. Thus, for example, the package may be hung in arms swinging about a horizontal axis. or pivot,

the centre of gravity of the package and arms be-. 56'

ing deflected from beneath said pivot by contact of one of the friction elements with the other, the latter being attached to the package. In this way a component part of the weight of the package presses the friction element together, while the remaining component of the weight'of the package is carried by the arms; The relative magnitudes of the two components depend on T' the shape of the triangle of forces formed by the vertical through thecentre of gravity of the package, a line joining the centre of gravity of the package to the axis about which it is swung, and the line normal to the contact between the friction elements, i. e. through the contact and at right-angles to the contacting surfaces.

Another method by which part of the weight of the package may be carried involves the use of two springs or spring systems, one of which reactsagainst a stationary part of the machine while the other produces a reaction between two friction elements by pressing them together. By

this -means, as the weight of the package increases both springs or spring systems are deflected by the same amount, the sum of the forces producing the deflections of the two springs being equal to the additional weight of the package while only the force producing the defiectionof one spring increases the pressure between the quently the torque I friction elements and conse driving the package.

The device of the present invention is particularly convenient in the collection of large num-'- bers of yarns after they have been submitted simultaneously to a liquid treatment or to some other treatment. For this purpose a large number of devices in accordance with the present invention may be mounted in the form of a creel for the simultaneous collection of the yarns. The invention is particularly convenient in this connection as it enables the taking up of a slack length of yarn produced during the changing of a yarn package. This is made very easily possible by reason of the fact that the invention enables the degree of slip occuring in the slipping frictional drive to be greatly increased'without detriment to the tension conditions under which the with reference to the accompanying 'drawings,in

Which Fig. 1 is a front elevation of one form of device.

according to the invention;

Fig. 2 is a side elevation of the deviceshownin Fig. 1;

Fig. 3 is a detail of the same device; and

Fig. 4 is a cross-sectional view of another form of device according to the invention.

Referring to Figs; 1-3, the device shown therein comprises a spindle I on whichis mounted a" package 2 for receiving the yarn, which is led to the package and traversed to and fro along its length by means of a traversing guide 3 mounted'on a reciprocating guide bar 4. The

spindle I has reduced ends 5-each of which drops into a slot 5 in a piece 1 spigoted into an arm 8 and secured therein by means of a screw 9. The two arms 8 are pivoted at their upper ends to a rod l0 which is secured in two bearings by,

means of set screws l2. Nuts l3; at each end of the rod |0 retain the arms on the ends of the rod without preventing them from pivoting relatively to the rod. The bearings are formed at the ends of rods l4 insertedlin bores |5 in a bracket I5 and slidable in and out of said bores. The

rods H are "secured in the bores I5 by means. of

locking screws H. The bracket I6 is itself mounted on a bar l8, forming part of the frame I of the machine, the bar |8 fitting intoa slot IS in thebracket, while a set screw is provided to secure thebracket |6 at any desired height. By means ofthe set screws I1 and 20, the horizontal and vertical pos ition of the rod ID on whichthe arms 8 are pivoted may be adjusted as desired.

The spindle on which the package} is mounted carries a friction wheel 2| constituting one of the friction elements for the purposesof the invention, the other friction element being in thelform ofafriction wheel22 mounted on a driving shaft 23,

Pressure between the two driving elements 2|, 22 is provided primarily by the weight of the package 2 and the, arms 8, and the inclination to thevertical of aline joining the rod l0 and the spindle the engagement of the frictionwheel 22 with the frietionjwheel ZI defiecting this line from the vertical. In order that the initial pressure between the friction elements 2|, 22 may be adjusted, there is provided a spring ,24 .attached at one end to'anarm. 25 attachedby meansof a set screw .26to a JQd 2| joining the, middles of thetwo arms 8.. The other end ,of the springs is secured to a screw. 28 which. passes. through aismall bracket 29 in, the middleofthe rod l0 andfis engaged by a screw 33 bearing,upon the bracket 29., The bracket 29, is secured to the rod.

I0 bymeans of a set screw 3|. By rotation f the screw 30 the spring may be brought to any desiredstate of tensionandthe initial pressure between the friction elements 2|, 22 may thus be adjusted.

n; th p r i n o e. v ce hw b n o the rod I0 is adjusted by means of the set screws l1, 2|] and by moving the rod l4 and bracket l6 until the desired proportion of the weight of the package is pressing the friction elements 2|, 22 together, and the screw 30 is then adjusted in order to give the desired initial pressure between the elements 2|, 22 so as to bring about the desired tension in the yarn at the beginning of the winding operation. The position of the rod |0 being properly adjusted, this tension in the yarn is maintained with small variation through the winding operation, the additional driving torque required toproduce the desired tension when the radius of yarn onthe package increases being brought-aboutbyan increase of the pressure hetween the friction elements 2|, 22 arising from the increased weight of yarn on the package.

The. device shown in Fig. 4 comprises a, vertical spindle 35 carried in a footstep bearing 36 and capable of rotating freely therein, the footstep bearing 35 being mounted in the frame 34 of the machine. 36, which takes theweight of the spindle 35, is carried on screw means comprising a vertical screw 38 with a lock nut 39 so that its height 'may be adjusted as desired. Theupper end 40 ing against a pad 41 abovethe light spring 43.,

Two vertical slots 48 are provided in the hollow part 490i the spindle at diametrically opposite points, and through said slots protrude pins or screws 49 extending from the piston 4| contained within the spindle 35., The spindle 35 is surrounded by a sleeve 5|] into which said pins or screws 49 project,'and the lower end of the sleeve 59 carries a platform 5| on which a bobbin 52, slipped over the sleeve50, may rest, the sleeve 59 and platform 5| together constituting a support for the yarn paekage 52. It will beseen that the springs 42, 43 are each connected at one end to the support 50,, 5| through the members '4| and-pins 49, and at the other end to the able member. The driving whorl is-providedwith a fia t upperface 51 against whichbears a friction pad 58 secured to the. underside of the platform 5| carrying the bobbin 52, The pressure between the contacting friction elements 5'1, 58 is derived from the support 59, 5| and is-communicatedby a spring system consisting, in the embodiment here described, of a single leaf spring 59. Surrounding the upper part. of the whorl 55, and capable of rotating with respect thereto, is a drum 59. serving. as a waste-drum, which isjprovidedwith ,a flange 6| at, its lower The hardened pad 3'! of the bearing.

edge, and is overlapped at its upper edge by a skirt 62 depending from the platform which carries the bobbin 52. The waste drum 60 is ca-' pable of rotating with the whorl 55, and tends to do so on account of a packing of thick lubricant, such as a. mixture of Vaseline and graphite in grooves 63 inside the drum. The drum, however, may be stopped, or may be permitted to rotate at any angular speed lower than that of the whorl 55. A traverse guide 64 is provided in the form of a wire pigtail projecting from a block 65 that slides in a vertical guide in the form of a slotted tube 66, being suspended by means of a light spring 6'! (for which a cord and counterweight may be substituted), and actuated from below by a cord 68 or like flexible member, to traverse up and down the length of the bobbin. When the waste drum 60 is being used the block 65 may be driven down to its level and locked by rotating it so that the pigtail 64 lodges under the recess indicated at 69, so that it remains stationary opposite the drum till it is required to traverse again. A vertical slot 10 is provided on the drum 60 to facilitate the removal of waste.

In the operation of the device the weight of the bobbin 52 and of the platform 5| and the tube 50 surrounding the spindle 35 are carried in part by the stiff spring 42 within the spindle 35, the weight being transmitted through the pins or screws 49 extending into the walls of the tube 50, and through the piston member 4| into which the pins or screws the hollow part of the spindle 35 to be freely carried by the lower spring 42 in this manner. This part of the weight is therefore carried ultimately by the footstep bearing 36 at the bottom of the spindle. Part of the weight of the bobbin 52 and of the tube 50 and platform 5| however, are transmitted spring 59 and friction pad 58 to the flat upper surface5! of the driving whorl 55. As the weight of the bobbin 52 increases both the leaf spring 59 and the springs 42 and 43 within the hollow spindle 35 are deflected so that, although the pressure between the friction pad 58 and the upper surface 51 of the whorl 55 is increased, it is not increased by the full amount by which the weight of the package 52 is increased.

In adjusting the device, an empty bobbin may be placed on the platform 5|, and the height of the footstep bearing 31 may then beadjusted until there is no driving contact between the friction pad 58 and the upper surface 5'! of the driving whorl. It will be understood that the raising of the footstep bearing 31 lifts the whole of the spindle 35, tube 50, platform 5|, and bobbin 52 independently of the driving whorl 55. The screw means 38, 39, used in this way, act as a coarse adjustment for the pressure between the friction pad 58 and the surface 51. When the driving pressure has been entirely released the screw 45 in the plug 44 at the top of the spindle 35 may then be screwed down until the desired pressure between the friction pad 58 and the upper surface 51 of the whorl 55 is obtained. This may conveniently be determined by placing a half-full bobbin on the platform 5|, and applying the desired tension to the end of the yarn thereon; the screw-45 is adjusted until the bobbin rotates independently of the whorl 55 by slipping of the friction pad 58. Since the screw 45 bears on the top of the light spring 48 inside the hollow spindle 35 a substantial movement of the screw allow the weight 49 are fitted. The slots 48 in through the leaf sure and fine adjustment of the pressure and consequently the tension ultimately produced in the yarn may be obtained.

Having described my invention, what I desire to secure by Letters Patent is:

1. A yarn winding device comprising two contacting friction elements adapted to provide a slipping frictional drive for a yarn package, a support for said yarn package secured to one of said frictional elements, said support being adapted to carry the total weight of said package and the parts of the device associated therewith, and to communicate, as a pressure between said friction elements, a component of said total weight that is in linear relation thereto throughout the winding operation, and means for relieving said friction elements of the remaining component of said total weight, which is likewise in linear relation thereto, whereby the pressure between said friction elements enables them to provide for the yarn package the desired driving torque increasing with the increasing diameter of the package.

2. A yarn winding device comprisinga pivot, a support swinging below said pivot and adapted to carry the weight of a yarn package, a pair of friction wheels, one adapted to be secured to said package, and the second contacting with the first and displacing said support from beneath said pivot, whereby there is communicated, as a pressure between said friction wheels, a component of said weight that is in linear relation thereto throughout the winding operation, said friction wheels being relieved of the remaining component by said pivot, and means for driving said second friction wheel to provide for said package a slipping frictional drive of the desired torque increasing with the diameter of the package.

3. A yarn winding device comprising an adjustable pivot, a support swinging below said pivot and adapted to carry the weight of a yarn package, a pair of friction wheels, one adapted to be secured to said package, and the second contacting with the first and displacing said support from beneath said pivot, whereby there is communicated, as a pressure between said friction wheels, a component of said weight that is in linear relation thereto throughout the winding operation, and is adjustable by adjusting the position of said pivot, said friction wheels being relieved of the remaining component by said pivot. and means for driving said second friction wheel to provide for said package a slipping frictional drive of the desired torque increasing with the diameter of the package. 7

4. A yarn winding device comprising a pivot, a support swinging below said pivot and adapted to carry the weight of a yarn package, a pair of friction wheels, one adapted to be secured to said package, and the second contacting with the first and displacingsaid support from'beneath said pivot, whereby there is communicated, as a pressure between said friction wheels, a component of said weight that is in linear relation thereto throughout the winding operation, said friction wheels being relieved of the remaining component by said pivot, an adjustable spring secured to said support to adjust the initial pressure between said friction wheels, and means for driving said second friction wheel to provide for said package a slipping frictional drive of the desired torque increasing with the diameter of the package.

5. A yarn winding device comprising an adjustable pivot, a support swinging below said pivot and adapted to carry the weight of a yarn be secured to said package, and the second con-. tacting with the first and displacing said support from beneath said pivot, whereby there is communicated, as'a pressure between said friction wheels, a component of said weight that is in linear relation thereto throughout the winding 6. A yarn winding device comprising a frame, two contacting friction elements adapted to provide a slippingfrictional drive to a yarn package, a support for'said yarn package, a spring-system between said support and oneof said friction elements adapted to communicate, as a pressure between said friction elements, a component of the total weight of said package and support that is in linear relation to said total weight, and a second spring system between said support and said frame adapted to relieve said friction elements of the remaining component of said total weight, whereby the pressure between saidfriction elements enables them to provide for the yarn package the desired driving torque increasing with the increasing diameter of the package.

'7. A yarn winding device comprising a frame, two contacting friction elements adapted to provide a slipping frictional drive to a yarn package, a support for said yarn package, a spring system between said support and one ofsaid friction ele-' ments adapted to communicate, as a pressure between said friction elements, a component of the total weight of said package and support that is in linear relation to said total weight, a light spring and a heavy spring each connected at one end to said support and at the other to said frame and adapted to act as a second spring system to relieve said friction elements of the remaining component of said total weight, whereby the pressure between said frictionelements enables them to provide for-the yarn package the desired driving torque increasing with the increasing diameter of the package, and screw means between each of said springs and said frame providing a fine and a coarse adjustment respectively for the initial pressure between said friction elements.

8. A yarn winding device comprising two contacting friction elements, one driving and one driven, adapted to provide a slipping frictional drive for a yarn package, a support for said yarn package adapted to carry the total weight of said package and the parts of the device associated therewith, and to communicate, as a pressure bepackage, a pair of friction wheels, one adaptedto tweenzsaid frictionuelements, a component of said total weightithat is in.lineartrelation.theretov throughout thewinding operation,:means for relieving said friction elements of' the remainin componentlof said total weight, which is likewise in linear relation thereto, -wherebythe pressure between'said friction elements enables them to provide for. the yarn'package'the desired driving torque increasing withthe increasing diameter of the package, and a waste drum frictionally connected to said driving element,'so as to be capableof being rotated thereby or to be readily prevented from rotating." 7

9. A yarn winding device comprising a frame, two contacting friction elements, one driving and one. driven, adapted to provide a slipping frictional drive to a yarn package, a support for said yarn package, a spring system between said support and the driven friction element adapted to communicate, as a pressure between said friction elements, a component of the total weight of said package andsupport that is in linear relation to saidtotal weight, a second spring system between said support and said frame adapted to relieve said friction elements of the remaining componentof said total weight, whereby the pressure between said friction elements enables them to provide for the yarn package the desired driving torque increasing withthe increasing diameter of the package, and a waste drum frictionally connected to said driving element, so as to be capable of being rotated thereby or to be readily prevented from rotating;

10. A yarn winding device comprising a frame, two contacting friction elements, one driving and one driven, adapted to'provide a slipping frictional drive to a yarn package, a support for said yarn package, a spring system between said, support" and the driven friction element adapted to communicate, as a pressure between said friction elements, a component of the total weight of said package and support that is in linear relation to said total weight, a light spring and a heavy spring each connected at one end to said support and at the other to said frame and adapted to act as a second spring system to relieve said friction elementsof the remaining component of said total weight, whereby the pressure between said friction elements enables them to provide for the yarn package the desired driving torque increasing with the increasing diameter of the package, screw'means between each of said springs and said frame providing a fine and a coarse adjustment respectively for the initial pressure between said friction elements, and a waste drum frictionally connected'to said driving element, so as to be capable of being rotated thereby or to be readily prevented from rotating.

' WILLIAM HARRY KIMPTON,

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