US2545534A - Winding machine - Google Patents

Description

March 20, 1951 Filed April 5, 1948 J. A. TRUlTT 2,545,534

WINDING MACHINE 7 Sheets-Sheet 1 INVENTOR.

L JOSEPH A. TRU/TT I I BY I March 1951 J.-A. TRUITT 2,545,534

WINDING MACHINE Filed April 5, 1948 7 Sheets-Sheet 2 INVENTOR. JOSEPH A. TRU/TT March 20, 1951 TRUlTT 2,545,534

WINDING MACHINE Filed April 5, 1948 7 Sheets-Sheet 3 II K INVENTOR. JOSEPH A. THU/T7 March 20, 1951 J. A. TRUITT 2,545,534

- WINDING MACHINE Filed April 5, 1948 7 Sheets-Sheet 4 INVENTOR. JOSEPH A. TRU/TT March 20, 1951 Filed April 5, 1948 J. A. TRUITT 2,545,534

WINDING MACHINE '7 Sheets-Sheet 5 INVENTOR.

JOSEPH A TRU/TT March 20, 1951 A. TRUlTT WINDING MACHINE '7 Sheets-Sheet 6 Filed April 5, 1948 INVENTOR. JOSEPH A- TRU/TT March 20, 1951 A, TR 2,545,534

WINDING MACHINE Filed April 5, 1948 7 Sheets-Sheet 7 IN VEN TOR.

" JOSEPH A. TRU/TZ' Patented Mar. 20, 1951 UNITED STATES PATENT OFFICE WINDING MACHINE Joseph A. Truitt, West Chester, Pa., assignor to- American Viscose Corporation, Wilmington, DeL,v a-corporationsof Delaware.

Application April 5, 1948,-Serial'No,-1 9,013

rate or which should be withdrawn from the As an example of supply at a constant rate. the first situation, the take-upmay be of yarn discharged, in wet'or'dry condition, from a machine for producing artificial filaments in a continuous manner As an example or the latter, the constant withdrawal by the take-up may be" of yarn froman up-twister in order to introduce uniform twist. In allof these'various situations, the w-inding system employed is preferably of the ,precise wind type inwhich there is a'consta'nt relationship between the angular speed of rotation of the spindle and the frequency of traverse of the yarn as it'i's taken-up in the package.

Aiurtherspecific objectof the invention is to provide a new mechanism fordriving the traverse guide at a frequency which is controlled in relation to'the angular speed of rotation of the spindle, to be---constant' or varied in a predetermined manner throughout the diameter of the package. Theva-riation, in a preferred'instance, can-be controll'ed to provide a constant helix angle between adjacent superimposed convolutions to provide improved flow of liquor through the package in liquid treatments thereof, such as washing," dyeing, bleaching, etc., and improved filtering action.

In general, the present invention utilizes a magnetic drive for rotating the-winding spindle at the desired speed. It comprises a rotatable member carrying one or more magnetizable elements and a s'econdrotatable member carrying one or more magnetic elements opposite the magnetizable element or elements; one member is secured to the winding-spindle and theother is. arranged to be driven by an outside power source, so that whenlthe latter member is rotated, such as by: an electric: motor, the other member and the spindle arerotated at a, pre* determined speed and a predetermined-torque which may be maintainedconstant throughout 12 Claims. (Cl. 242-18) the Winding: or may be'varied in a, predetermined manner by; varying the air gap between the magnetizablei elements and the magnetic elements:

Alternately, the: first rotatable member may carry magnetic elements and the second may carry magnetizable elements. Again,. each; rotatable member may carry both magnetic and, magnetizablel elements. The air gap may-be varied. by axially shifting one: or. both of: there-z tatable' members, which'may' take the form oi ccaxially mounted adjacent: discs, or concentrically relatedrings, cylindrical. or conicahone sur-. rounding the: other. H

In the. drawing; illustrative Of the invention,

. Figure '1 is: a. front: elevation of a winding ma-' chine embodying the presentinvention,

Figure Z-is. aside elevation-of the windinglmachineshownin Figure 1,

Figure 3 is a plan view ofthe. embodiment of 20 Figure- 1,

Figure 4 is a wiring diagram forthe embodiment of Figure 1,.

Figure 5 is a front elevation-of a secondizemt bodim'ent;

Figurefi is a side elevationof the second-cub: bodiment,

Figure 7 is -aplanmie'w of the second embodis ment,

Figure 8:is aside elevation of a third embodiment, and I a Figure 9 ice; detailedview of part ofthe third embodiment. 4

' While the invention-willbe described herein:- a fter in-relation to a winding machine for produoing cone-shaped packages, it is to be understood that it is not limited-theretoa --Referring to the emb'odimentof Figures-l to e of the'drawing, reference numeral 2 d'esignates the fixed main frame of the machine. At the topof frame 2, a rotating-spindle 3 is journaled in-suita'ble bearings and is adapted tobedriven by means hereinafter described. The" spindle is adapted to receive a cone or cop tube 4' upon which the-package5 is'to' bewound.

A shaft 6 is journaled in the frame 2' and'ex tends in a direction parallel to the winding spindle 3.: This shaft 6. is connected to' the spindle and. is driven therefrom by suitable means, suchas gears 62, 6a and 6b. The shaft" 6 also carries a helicalgrooved. cam l for rotation therewith. g A traverse frame 8' is pivotally mountedupo-n the: shaft fi' upon which it is suitably balanced such, as by the-counterweight 9-. This traverse frame 8 is, provided: with a backing plate l0 and a porcelain bail l I may be rotatably supported on a wire l2 whose depending legs adjacent the ends of the bail are suitably fastened within recesses in the plate In by means of set screws l3. The traverse frame 8 is constructed to provide a horizontal groove through which a traverse bar 14 may reciprocate. A thread guide l5, whose upper end is adapted to press lightly against the package being Wound is fastened to one end of the traverse bar l4 for reciprocation therewith. The other end of the traverse bar l4 is provided with a head i6 having a depending pin or roller l7 adapted to engage the groove in the helical cam i. As the package builds up, it gradually swings the traverse frame 8 away from the spindle 3 and the traverse frame is prevented from swinging back toward the spindleby means of a lever l8 having one end fastened thereto at 19 and the other end engaging within a groove formed underneath a segment 20 which is pivotally fastened to the main frame 2 at 2 l.

The operation of the winding machine is initiated by a starting lever or handle 22, mounted on one end of a stud 23 pivotally mounted near the top of the main frame 2. A lever 24 adjacent the starting lever 22 is mounted fixedly on the rod 23 so that it rocks therewith but there is some play between lever 22 and the lever 24, which play is taken up by a spring 2211 which. normally urges lever 22 in a counterclockwise direction relative to lever 24. One end of lever 24 is normally biassed in a counterclockwise direction by a spring 25 fastened to the frame 2 and is provided with a braking means 26 which is adapted to press against the spindle 3 and to stop the rotation thereof when the lever 22 is in the stop position. The other end of the lever 24 is formed as a curved arm having a hook 21 at its end. When the starting lever 22 is swung into operating position, brake 25 is lifted from the spindle (as shown in Figure 1), lever 22 makes electric contact with a spring terminal 24a (closing a starting circuit for the driving motor) and the hook 2'1 engages another hook 28 secured to orconstituting part of the pivoted segment 20. The machine may be maintained in running position by setting these hooks 2'1 and 28 in opposition to the spring 25 which otherwise would tend to' set :the brake and to swing the starting lever 22 into the stop position. The pressure exerted by the guide against the exterior winding of the package is controlled by, a, counterweighted arm 29 pivotally mounted on a bracket 30 fastened to the frame 2 of the machine. The link 3| is connected to arm 29 a short distance from its pivotal axis and is connected to the traverse frame 8 at 32. For adjustment, the end of link 3| may be inserted into any one of a series of sockets 33 provided. It will be seen that as winding proceeds arm 29 swings in acounterclockwise direction and that this swinging of the counterweight causes a gradual decrease of the force exerted by link 3! in opposition to the turning of the traverse frame 8 in a clockwise direction.

In operation of the machine, the yarn coming from a stationary package, from an up-twister, from the last stage of a continuous spinning machine, or from any other source passes first over the guide 38a, under a break or exhaustion detector 38, over the porcelain bail II and through the traverse guide 15 to the package. The break detector 38 comprises a device pivotally mounted at 39 upon segment 20. The device is composed of two arms 40 and 4|, one of which 40 extends toward a wheel 42 having numerous projections or ridges 43 thereon mounted upon the cam shaft 6 for rotation thereby. The other arm 4| is bent to form a horizontal extension 44 adapted to ride upon the yarn and along which the yarn may traverse to a certain extent. The extension 44 may be bent at the end to form a hook 45 to prevent the yarn from accidentally slipping out of engagement therewith. The first arm 40 is of such length and the entire detector device 38 is so balanced that upon breakage of the yarn, the device swings in a clockwise direction to bring arm 40 into the path of the projections 43 upon the rotating wheel 42 which in turn forces the segment 25 in a counterclockwise direction sufficiently to release the two hooks 27 and 23 and thereby permit the spring 25 to throw the starting lever 22 into the stop position to apply the brake. Also, when arm 49 swings into the way of projections 43, it makes electric contact with a terminal 45a, which energizes a relay for opening the electric circuit to the driving motor, asv will be explained hereinafter.

The arm 40 of the breakage detector is independently pivotally supported at 4 3 on the pivotal mounting 49 upon which the other arm 4| is fixedly secured. A screw-50 secured to the pivotal mounting 49 of the end; breakage detector serves as a rest for the arm 48 to limit its counterclockwise'motion with respect to the pivotal mounting 42 of the end breakage detector.

In the form of the invention shown in Figures 1 to 4, an auxiliary arm 5| suitably secured to arm 29 for swinging motion therewith has a portion 52 arranged to engage arm 453 and to swing it into the path of the projections 43 when the predetermined size of package is attained, whereupon stoppage of the machine is effected. The arm 5! may be secured to arm 29 by means of a bolt 53, adjustability being provided for by a slot 54 in arm 29. The arm 5i also may be provided with an indicator comprising the pointer 55 adapted to cooperate with the scale 55 upon the arm 29. The scale may be graduated to correspond with the sizes of packages that would be attained upon setting the pointer to the severa indicia thereon.

Reference to the drawing will show that the application of the auxiliary arm 5i to arm 29 may readily be compensated for merely by an adjustment of the counterweight on the arm 29.

The magnetic driving means which constitute the most important feature of the present invention comprises the rotatable member carrying one or more magnetizable elements or magnetic elements Bl secured therein. Though member 55 can be made entirely of magnetizable material and magnetized with the proper number of poles, the main body of the rotatable member Bil is preferably of non-magnetic material, i. e., a material which is substantially uninfiuenced by the relative movement of a magnetic field with respect thereto. When a plurality of elements 5! are provided they are preferably provided in pairs or in even--numbers--for example, 2; 4, 6., 8, l2, I6, 24 or more, in which event they are disposed with magnetic poles alternating symmetrically about the axis of the rotatable member 60. If a single magnetizable or magnetic element BI is preferred, it may constitute a continuous annulus about the member. The external periphery of the member 60 may be provided with gear teeth as 52 which mesh with gear 6a.

The rotatable member 60 is connected to the spindle-e for rotation therewith and for axial sliding motion therealong and, for this purpose,- the shaft 3 is provided with splines or ridges 83 which fit slidabl-ywithin the sleeves 64 and 65 secured together by screw threads 66.- A key El secures the member till to the sleeve 65.

I Means isprovided for axially moving themember 63 relativeto thespindIe-BL This means comprises a ring 68: (Figure 3) fitting within anannular recess provided in'the outer peripheryof the sleeves 64 and 65.- The ring 68" is provided with two diametrically opposed pins 69. which project through-slots l and H in the bearing 12- and annular yokeor cam 13 fitting slidably' therearounds The slots within the bearing 12 extend axially, whereas the cam" slots 3! in the yoke 3- are each provided witha projecting lug M te which ispivotally' secured a link 15 (Figures 2=and3)".- The link 'i5 is pivotally connected to a lever 76 which carries an adjustable clamp 76 having a bore for pivotally receiving the pin Il upstanding from '58 to provide a fulcrum for lever 16. One end of lever 16 projects into the path of a rod 79 (whichmay be described as a cam-rod because of its function) securedto the traverse frame just back of one end of the bail wire l2 (see particularly Figure 2). The lever 76-- is also slotted at 80 to receive a pin 8| carried by a reciprocable core 82 operated by the solenoid coil 83. A spring 84 normally urges lever 16 toward the coil and a'bore provided in an ear 85 projecting upwardly from the frame I8 serves to guide the rod 82. The core 82- has its magnetic center displaced on the side of the coil 83 away from lever. 16 so that when coil 83 is energized, it imparts clockwise motion to lever 16 as viewed in Figure 3, overcomingspring 8 1, and pressing lever 16 against rod 19.

Opposite the rotatable member so is disposed the rotatable member 86 which may be similar in construction, being provided with one or more magnetic elements or magnetizable elements 8?, corresponding innumber and disposition-to the elements SI of the member 69. When elements 6| are of magnetic material, elements 8'! are of magnetizable material, or vice versa The e1ementor elementsfi-l or 81 may be of any mag netizable: material, such as soft iron, cobalt, nickel, or alloys thereof, .but a preferred alloy is that known asAlnico one type of which consists .circuitstherefor, or of permanent magnetic material, such as magnetized steel, cobalt, nickel, or other alloys thereof such as those. known as Alnic'o and Cunico. In the preferred instance,

, particularly when the Alnico alloy mentioned hereinabove is used in the other elementor elemerits, the alloy known as Cunico consisting of A. 0. line 95 having two of the lead lines: c'orinectable to the motor 93' by means-of the contactsvv 9e and 9? respectively, the third Phase being grounded as shown. The core 98' carrying contacts 96, 96a, 9'! and 99 which are normally open,

[63' and IE4 the starting lever 22 and contact- 24a are disposed. The normally closed contact I05 is provided between branch lines I06 and llll. The line i0! is arranged "to be connected in series with line I08 connected to one I terminal of the motor by means of contact 99.

% copper, 21% nickel. and 29% cobalt may be 7 Figure 4 illustrates diagrammatically an elec-- trio circuit for interconnecting the various elemerits of this embodiment of the invention. It shows asource of current, such as a three-phase 16 against rod l9.

The coil 83'is connected to one of the lines 95 and through contact 96a is adapted to be connected through lead line ID -la to another of the lines" 95;

The arm 46 which is responsive to thread exhaust, breakage and also to completion of thepackage, is connected by line I09 to one of the power supply lines, whereas the terminal 40a is connected by a line III to coil HZ of the relay which controls contact I05. Coil 2a is connected by line 5 I3 to another line of the power supply.

The operation of'this embodiment is as follows:

In starting the machine, the operator swings operator has secured the mg 21 under the latch 28, he is free to release lever 22 which is caused to break contact with terminal 2 3a because of spring 22a. Contact 99 maintains the current in the holding coil I09 and contact 96a maintains current in coil 83, thereby holding lever During operation of the motor, the rotatable member is in close position to the rotatable member by virtue of the coil 83 urging lever 16 into contact with rod 19 carried by the traverse frame. As the package builds up, however, the swinging of the rod 79 causes lever 16 to swing in a counter-clockwise direction as viewed in Figure 3 which causes the ring 13 to rotate about the bearing sleeve 12 and shift the member 6!] away from member 85. The extent of this shift can be predetermined by pre-selecting thecurvature of rod '39 (that is, by replacing a straight rod 19 with one having any desired curvature along its line of contact with the lever 16) and/or by the adjustment of the location of pivot H by the set screw Tl.

By this means, it is possible to vary the gap between the magnetizable element 6! and the magnetic element 81. By so varying the gap, the tension exerted upon the strand as it is drawn to the package over guide l5 can be controlled in a predetermined manner. This result is obtained by virtue of the slip or diiference in speed of rotation between the driven member 6!! and the driving member 86 which are coupled by the magnetic fields therebetween. Less slip is obtained when the gap is lessened so that, as the winding builds up and the diameter of the package requires a slower speed of rotation, if it is desired to maintain an approximately constant tension, it is necessary to widen the gap continuously during the winding operation. If it is desired to reduce the tensiongradually during the winding, it is merely necessary to adjust amasss the pivot 17 of lever to increase the rate of separation between members 85 and 60 over that which would give the constant tension. Conversely, if it is desired to increase the tension during winding the adjustment is set to reduce the rate of separation.

In case the threads should break or it should become exhausted from the package or other source supplying it during the winding of the package 5, or in case the package 5 becomes full, the arm All is swung in a clockwise direction into contact with terminal Ma and with the projections 43 of the wheel 42. The circuit in Figure 4 shows that upon closing the circuit at Ma the coil H2 is energized. Energization of coil I i2 opens contact W5, thereby de-energizing the holding coil ifit and opening contacts 96, 96a, 9! and S9, and consequently interrupting the current supply to the motor and to the coil 83. De-energization of coil 83 allows core 32 to be urged by spring B l in such a direction as to swing lever '55 in a counterclockwise direction, which in turn withdraws member 68 to its maximum displacement from member 85. This reduces the magnetic influence upon elements 6i to a negligible amount so they do not acquire a set magnetism upon stopping of the machinev In addition, the latch 28 is lifted to release lug 2! which allows spring to apply the brake 25. These several functions all occur substantially simultaneously when the arm ts is swung into stopping position. After the condition has been remedied, the machine may be started as indicated hereinbefore.

In the second embodiment shown in Figures 5 to '7, certain of the parts are the same as in the embodiment of Figures 1 to 4 and parts are designated by the same reference characters. In this embodiment, however, the frusto-conical rotatable member 600. is secured to windin spindle 5a in a fixed manner, as by the key iii-i, and a gear H4 keyed to the shaft 3a meshes with the pinion So for driving the cam l through gear 6b. The other rotatable member 86a has a conical external surface complementary to the conical internal surface of the rotatable member 68a and each of the members is provided with magnetic or magnetizable inserts Bid and 87a. As in the previous embodiment, when 65a is of magnetic material, elements are of magnetizable material and vice versa. In this embodiment, the member 86a is movable axially with respect to the member 66a and this may be accomplished by means of the lever 'lSa (corresponding to it of Figures 1 to 4, but being longer in order to reach further back from the winding head) The lever 76a for rotating the yoke is provided with the cam slots H for imparting axial movement to the member 85a is secured to the lever 76a by an adjustable clamp '35 as in the previous embodiment and the lever a is pivoted upon a stationary part of the frame at 'l'la beyond the clamp is, thereby making lever 55a of the third class. A spring as normally urges lever 76a against cam rod 19. A frame member 58a having a horizontal upper surface supports and guide lever 550, durin its swinging motion. The member 86a and the means for imparting axial adjustment thereto are carried upon the splincd shaft 880, in a manner analogous to that in which member 5a, is carried upon the splined shaft 3 in the embodiment of Figures 1 to 4. The shaft 88a may be provided with a worm wheel cm which meshes with a worm 94a driven by a shaft E55. This shaft may carry a plurality of worms We at spaced intervals along its length for driving a number of such winding machines.

In this embodiment, the member 86a rotates at all times except when it is desired to shut down the entire machine including all of its winding units for extensive repairs. However, in case of yarn breakage or exhaustion of yarn from the supply or filling of the package, the arm 40 of the stop mechanism is swun into the path of the cogs on the wheel 42, thereby lifting the segment 2d, disconnecting the latch 21 and 28 and applying the brake 26 to stop the winding spindle. Such stoppage, as stated, does not stop the rotatable member 8611 and this system of stopping is of advantage when a number of machines are driven from a common power supply since it enables one machine to be stopped for replacement of a package, replacement of supply, or tying of broken ends without shutting'down adjacent winding spindles. After the cause for the momentary stoppage is corrected, the operator merely releases the brake and sets the latch 21 and 28 to start the spindle again. As in the previous embodiment, one of the rotatable members, 86a in this instance, is shifted axially with respect to the other a throughout the winding of the package in order to control the tension during winding. As in the previous embodiment, this tension may remain constant or it may be varied in a predetermined manner. This embodiment also is adapted to take yarn from any source of supply, and particularly those mentioned hereinabove in connection with Figures 1 to 4, such as an up-twister for producing uniform twist by virtue of the constant speed of take-up, from a continuous spinning machine, or even from a stationary package. This embodiment has also the additional advantage over that of Figures 1 to 4 in that the rotatable member 86a shifted is not in engagement at its periphery with other driv-- ing elements as member Gil was engaged with pinion 6a of the embodiments of Figures 1 to 4.

In the embodiment of Figures 8 and 9, the construction of the embodiment in Figures 5 to 7 is further modified in that a magnetic clutch or interconnection is provided between the gear 6b and the cam l. The magnetic coupling therebetween comprises concentric cylindrical members, one 601) surrounding the other 86b. Member 86b is fixedly secured to a shaft H6 upon which the gear 61) is mounted for rotation therewith. The member 60bis mounted for axial mo-, tion relative to 86b in a manner similar to the corresponding internal cone of the embodiment of Figures 5 to 7 and the disc 69 of Figures 1 to 4. The yoke 13 provided with the cam slots H in this instance is connected by an upwardly extending lever 16b reciprocably guided through a bore in a 111g ill secured to the frame and normally urged upwardly by a spring H8 bear ing against the upper face of the lug Ill and a pin H9 secured to the lever 16b. At its upper end, lever b is provided with a yoke I26 supporting a rotatable follower roll i2| which bears against the under-surface of a cam I22 having the form of a wedge and secured, as more particularly shown in Figure 9, to the lever 16a which operates the means for moving the member 86a axially. A fixed plate E23 provided above the cam I22 serves to guide the lever 16a, and the cam I22. In this embodiment, it will be seen that as the package builds up member 86a shifts axially relative to member Eta. This serves to' control the tension and the speed of winding of the yarn upon the spindle. In addition, however,

stirs :membe'rtflb :is moved; axiallyrpreierably :in .rzisuchra manneras to reduce the overlap between :ithe' elements-261:1) (magnetic or ma netizable) with iirespectgto' the elements til/lb imagnetizable x01 magnetic). :As the roverlap' decrease the slip between the members 861 and 60b gradually .i'inerea'sesaso that the frequency of the traverse .guide iper revolutionucf spindle rotation is .changedduring the build-mp of the packa The lower surface of cam I22 can be preselected to give any. desired {change in frequency. In one preferred instance, it is shaped in such a man ner that the frequency of the traverse guide decreases at the proper rate to maintain a constant helix angle between the guidings in adjacent superimposed layers for the purpose of improving fluid flow through the package in cases where it is desired to subject the final Wound package The provision of the magnetic clutch of the present invention makes 'it possible to vary the angle in any predetermined manner or to maintain it constantlthroughout .such winding. 1 As in the other embodiments, that of Figures 8 and 9 is adapted to serve as the take-up for yarns proceeding from a continuous spinning machine, from an up-twister, or from any other source of supply, and especially those which necessarily deliver the yarn at a constant rate of speed, or in which it is desirable that the take-up withdraw the yarn at a constant rate of speed.

Although the various specific forms of magnetic clutch members are shown in specific relationships, it is to be understood that any one of the forms, that is, concentric cylinders, concentric cones, and coaxial discs, can be used in any relationship desired. In general, the amount of axial movement between the members of the magnetic clutch during the building of the package may be as low as 0.02 inch, or as high as A to /2 inch, the lower figures being commonly employed with the plate type or cone type memhere as in the embodiments of Figures 1 to '7, whereas somewhat great r axial displacement may be found necessary with the cylindrical relationship shown in the embodiment of Figures 8 and When serving as a take-up for yarn fed to the device at constant speed, as from a continuous spinning machine, the relative movement between the members whereby the air gap is varied serves to regulate the yarn tension in any desired manner, either maintaining it constant or gradually increasing or decreasing it as desired in spite the fact t at the yarn speed is con" stant. When the device serves as a drawing off as well as a take-up device, the variation in the air gap between the members of the magnetic clutch serves to regulate both the yarn speed and tension. In the case of drawing yarn from an up-twister, it serves to maintain the speed of withdrawal constant so as to produce a uniformly twisted yarn. This invention thus provides a winding system which makes it possible to control the tension in any desired manner throughout the winding of the package in spite of the fact that the package diameter is increasing. It is to be understood that changes and variations may be made without departing from the spirit and ;.s.cope cf th invention as d fined in theapp nd d claims.

Iclaim:

'1. A windin machine comprising a rotatable spindle 'ior receiving a carrier upon which a strand is to be Wound, a rotatable member carrying'aanagnetizable element, a second independently rotatable coaxial membercarrying a mag- .Jnetic element opposite the first member, 'said rotatable members being relatively movable in an axial-direction, one of the members bein con- I nected to the spindle for rotatingit upon rotation of the member, stopping :means ior the machine, and means responsive to actuation of thestopping meansfor separating the rotatable -members 'into positions of minimum magnetic 1 interaction.

2. A-machine in accordance with claim "1 comprising a part movable in response to the change pendently rotatable member carrying .a mag- 'netic element opposite the first member, said members being relatively -movable axially, one of the members being connected to the spindle for rotating it therewith, means for rotating the other member, means for stopping the rotating means, resilient means for urging one of the members away from the other, means for urging said one member toward the other in opposition to the resilient means, means for initiating the rotating means, and means for rendering the last-named urging means inefiective upon operation of the stopping means.

4. A machine in accordance with claim 3 which comprises means for predeterminedly varying the relative axial separation between the members during winding.

5. A machine in accordance with claim 3 comprising a part movable in response to the diameter of the package, and means operated by said movable part for predeterminedly varying the axial distance between the members during winding.

6. 'A winding machine comprising a rotatable spindle for receiving a carrier upon which a strand is to be wound, a guide for leading the strand to the package, means for traversing the guide from end to end of the carrier to distribute the strand thereon during winding, driving means interconnecting the spindle and the traversing means for maintaining a predetermined frequency relationship between the traverse of the guide and the angular speed of the spindle, a rotatable member carrying a magnetizable element, a second independently rotatable coaxial member carrying a magnetic element opposite the first member, one of the members being connected to the spindle for rotating it upon rotation of the member, means for rotating the other member, stopping means for the machine, and means responsive to actuation of the stopping means for separating the rotatable members into positions of minimum magnetic interaction.

'7. A machine in accordance with claim 6 comprising means automatically operable during the winding for varying the distance between the members in a predetermined relation to the diameter of the package.

8. A machine in accordance with claim 7 in which the frequency of traverse per spindle revolution remains constant throughout the winding.

9. A machine in accordance with claim 8 in which the interconnecting driving means comprises a second pair of independently rotatable coaxial members, one comprising a magnetic element and the other a magnetizable element.

10. A machine in accordance with claim 9 comprising means automatically operable during the winding for varying the axial distance between the members of each pair in a predetermined relation to the diameter of the package.

11. A winding machine comprising a rotatable spindle for receiving a carrier upon which a strand is to be wound, a guide for leading the strand to the package, a traverse frame for supporting the guide, means for reciprocatin the guide relative to the traverse frame, the traverse frame being swingably mounted to allow the guide to move away from the spindle as the package builds up, a rotatable member secured to the spindle for rotation therewith and carrying a magnetizable element, a second substantially coaxially mounted and independently rotatable member carrying a magnetic element opposite the first member, means for rotating the second member, the first rotatable member being axially movable relative to the second rotatable member, said machine comprising a rotatable cam for imparting axial motion to the first member, a member secured to the traverse frame for motion therewith, and a linkage comprising a lever engagin the last-named member for rotating the cam member in response to a change in the package diameter.

12. A machine in accordance with claim 11 which comprises resilient means for urging said lever against the member carried by the traverse frame.

JOSEPH A. TRUITT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,248,898 Parks Dec. 4, 1917 1,862,267 Honig June 7, 1932 2,237,112 Parvin Apr. 1, 1941 2,317,290 McIlvried Apr. 20, 1943 2,329,027 Almy Sept. 7, 1943 2,401,982 Springhorn June 11, 1946 2,415,764 Shilthius et a1 Feb. 11, 1947 2,436,557 Davis et al. Feb. 24, 1948 FOREIGN PATENTS Number Country Date 301,928 Germany Mar. 2, 1917

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