US2618441A

US2618441A - Cone winder tension compensator

Info

Publication number: US2618441A
Application number: US240698A
Authority: US
Inventors: Marcellus Brooks
Original assignee: Barber Colman Co
Current assignee: Schneider Electric Buildings Americas Inc
Priority date: 1951-08-07
Filing date: 1951-08-07
Publication date: 1952-11-18
Anticipated expiration: 1969-11-18

Description

Nov. 18, 1952 B. MARCELLUS CONE WINDER TENSION COMFENSATOR 2 SHEETS-SHEET 1 Filed Aug. 7, 1951 Q/Q/IM 0 ikxz a m.

INVENTOR. Brao K5 Md/"66 //u s BY W, $1 371 WM A TTORNE Y5 Nqv. 18, 1952 B. MARCELLUS CONE WINDER TENSION COMPENSATOR 2 SHEETS-SHEET 2 Filed Aug. 7, 1951 INVENTOR. .Broo/fs Marce l/ua Jig. z.

M, WM 7% ATTORNEYS Patented Nov. 18, 1952 CONE WINDER TENSION COMPENSATOR Brooks Marcellus, Rockford, 111., assignor to Barher-Colman Company, Rockford, 111., a corporation of Illinois Application August 7, 1951, Serial No. 240,698

. 16 Claims.

This invention pertains to machines for winding conical packages or cones of yarn. When a conical package of yarn is wound at constant rotary speed, the linear speed of the yarn varies as the yarn is traversed back and forth between the large end of the cone and the small end, the

linear speed being greatest at the large end and smallest at the small end. As a result there is a tendency for the yarn to be wound with less tension at the small end than at the large end so that an unsatisfactory cone having non-uniform density is produced.

It is an object of this invention to provide a cone winder having improved means for producing variable frictional tensioning on the yarn in order to wind cones with substantially uniform tension. This invention provides means to compensate for the fact that there is a decrease in the proportional variation in the linear Winding speed between the large and small ends of the cone as the yarn accumulates on the cone. Thus it is a further object of the invention to provide a cone winder having a tensioning device which varies the winding tension as the yarn is traversed between the large and small ends of the arrangement shown by way of illustration in the accompanying drawings, in which:

Figure 1 is a somewhat diagrammatic perspective view of a yarn winding machine constructed in accordance with the invention.

Fig. 2 is a partly sectional elevational view of a portion of the machine-including the yarn tensioning device, and.

' Fig. 3 is a fragmentary view similar to Fig. 2

- showing a change of position of the tensioning device.

While the invention is susceptible of various modifications and alternative constructions, there is shown in the drawings and will herein be described in detail the preferred embodiment, but it is to be understood that it is not thereby intended to limit the invention to the form disclosed, but it is intended to cover all modifications and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims.

In Fig. 1 a yarn strand I is being wound into a conical package or cone I I on a conical winding form I2. The winding machine includes means adjacent the cone II to traverse the yarn back and forth along the cone between the large and small ends thereof. In this instance, the traversing means includes a yarn traversing drum I3 carried for rotation by a shaft Id. The drum has a single traversing groove I which in this instance runs in spiral fashion from one end of the drum to the other and back again in one revolution of the drum.

The yarn strand II] is-wound on theconical package II by rotating the cone as the yarnis traversed from one end to the other. In..th is instance the cone is frictionally driven bythe winding drum I3, the winding drum being rotated by means of a source of motive power (not shown) connected to the shaft I4. In order to hold the cone II in frictional driving engagement with the drum l3, the conical winding form I2 is rotatably carried on the end of an arm I'I supported by a rock shaft I 8. The cone I I is held against the drum I3 in any suitable way. as by the weight of the cone II, the-Winding form I2, and the arm ll. r

The yarn strand I0 is fed to the traversing drum it along a predetermined path from a source of supply in the form of a bobbin 29. In traveling along its path, the yarn I0 is guided by means of an eye 2! in a plate 22 positioned above the bobbin 20. The yarn passes over a pair of adjacent elongated'guide members in the form of

abutments

25 and 25 positioned transverse to the yarn path above the eye 2!. A further elongated guide msmber in the form of a rod 26 is positioned transverse to the yarn path above the abutment l5 on the same side of the yarn as the abutments. A thread detector 28 may be held in contact with the yarn between the

abutments

24 and 25 and on the opposite side of the yarn therefrom. The thread detector 28 may be rockably carried by means of a shaft 29. A rockable yarn cleaning snick plate 30 (Fig. 2) is disposed opposite the upper abutment 25.

In accordance with this invention, a tensioning device 3| acts upon the yarn II) at a point along its path from the bobbin 20 to the drum I3. lhe tensioning device preferablyacts upon the yarn between the guiding abutment 25 and the guiding rod 26. In this instance the tensioning device includes yarn deflecting means 32 in the form of a plurality of parallel grid rods 33 movably carried by a depending arm 34 of a bell crank 35 which is rotatably mounted on a shaft 36. A

second yarn deflecting means 38 is provided, which in this instance includes a plurality of parallel rods 39 arranged to form a second grid 43. The grid rods 39 are carried on an arm 4! pivoted on the shaft 36, the rods being staggered with respect to the grid rods 33 so that one set of rods can, mesh with. the other. In this particular machine, threerods; are employed on each deflecting means. The arm 4| has two notches 32 to provide for meshing of the sets of grid rods.

The

yarn deflecting devices

32 and 38 are posrtioned on opposite sides of theyarrr strand It; In this instance the deflecting device 32 is movable to deflect the yarn toward

theguidingmembers

25 and 26 while the other deflectingdevice 38 is movable toward the first deflecting device 32 to deflect the yarn in the opposite-direction. Thus the grid rods 33 and 39 may be. advanced in opposite directions to increase the frictional tension on the yarn strand It. When the grid rcds'3'3 and-39-arefully advanced, the yarn-strand isfdeflected around the rods in serpentine fashion asciearlyshown inFig: 2.

Means is provided to oscillate one of the defleeting means 32 or 3-8 backand forth in order to change'the' frictional resistanceto yarn'movemeans 32 is moved back and forth by means of.

a cam 44" mounted? on a shaft 45' which carries asprocketwheel 46*driven-by'a chain 4'! running on a sprocket wheel 48 carried" by the drum shaft f4. Thecam 44' may be driven atthe'same rotative speed as the. drum I 3. In'orderto move the yarn deflecting means 32, the cam 44' may act upon a cam riding'roller'53' carried on the end of a generally horizontal" arm ofthe bell crank 35. In this instance the cam. 44 is positioned so that the high portion of the cam is acting on the bell crank 3'5when the drum l3"is feeding the yarn in to the large end of the cone II. The cam 44 rotates to permit the. grid rods 33 to advance against theyarn In as the yarn is traversed toward the small end. of the cone" I I. The follower roller 50may be held against the cam 44 by means of a coil spring 54 tensioned between the" arm 34 and'a stationary, pin 55.. I

A'tithe beginning of the. winding operation the yarn deflecting. means 38I'isfullyadvanced so that the.- back and forth oscillation of the other yarn deflecting means" 32 produces a. maximum variationinthe frictional'tensioning provided by the yarn. tensioning. device 3|. Means is provided to reduce. the. variation in tensioning' as the yarn builds. up on the cone As the diameter of the. cone. increases, there is a decrease in the percentage, variation in. the linear speed of the yarnasthe yarn istraversed' from one end of the cone/to the other.. Consequently, there is need for less variation in the frictional tensioning of the-yarnas the yarn accumulates on the cone Inorden to reducethe variation in the tensioning, means is provided to Withdraw the yarn deflecting means 38 in: response to accumulation of wound yarn, on: the cone.- I Inthis instance the deflecting means 38. withdrawn by operating means 5E'which produceswithdrawing. movement of thedeflecting means as the winding form l2 moves away from the winding drum l3. Theform i2 is moved away from'the drum by wound yarn which accumulates thereon. In the illustrated embodiment, the operating means 55 includes a cam" 58 which is driven by the rock shaft I3 supporting the arm H which carries the form l2. The cam 58'is'm0unted" on a shaft 59 wh1ch 1s connected with the rock shaft l8 by means of a link rod 33 pivotally connected to arms 6| and 62 carried by the shafts l8 and 59. The cam 58 operates the deflecting means 38 by means of a cam follower B3 slidably carried in a stationary bearing 64 (Fig. 2). The cam follower 63 has a roller 35 which rides on the cam 53. The follower 63- is connected; with;the'arm 3| by means of a link 33 having its opposite ends pivoted to the slider and the arm 4|. In this instance the follower roller 65 is held against the cam 58 by means: of a: coil spring 68 tensioned between the arm 4| and a stationary pin 69.

In; the operation of the machine, the conical winding; form I2 is initially held in frictional driving engagement with the drum |3 by means of: the: movable; supporting arm ll. Yarn is threaded from the bobbin 2!] through the eye 2| over the

abutments

24, and 25, between the deflecting means 32 and 38, over the guiding rod 26, and alongthe traversing groove 5to theiconical winding form [2. When. winding begins, the winding'form His/rotatedby the drum I3 and theyarn istraversed along the form I 2. from end to end by the traversing groove I5 in the drum. When the yarn is being wound on the small end of theform [2, the linear speed of the yarn is relatively small. As theyarn is traversed toward the large end of the form l2; the linear speed increases in proportion to the. increasing diameter' of" the form. The increasing linear speed of the yarn tends to increase the tension. on the yarnand produce denser winding at" the large end. of the form than. at the small end.

However, by means of this invention, the frictional resistance to movement of the yarn is decreased as the yarn is traversed toward the-large end of the form l2. This is accomplished by withdrawing the yarn deflecting means 32 as the yarn is traversed toward the large end oi the coni'cal'package Asthe traversing ofthe yarn reaches-the large end and begins to proceed toward the small end of the cone H, the cam M is rotated so that the roller 50 rides down the cam by virtue of the tension provided by the spring 54'. The grid rods 33 on the deflecting means 32 are thereby moved toward the guiding

members

25 and 26 and the gridrods 33 so that the yarn H! is given an increasingly serpentine path around the rods and the guiding members. The point of maximum advance of the deflecting means 32 is reached when the yarn is being fed to the small end of the cone by the traversing drum l3. At this point the tensioning device 3! provides a maximum tension. The maximum tension position of the deflecting means 32 is illustrated in full lines in Figs. 2 and 3. As the yarn is traversed toward the large end of the cone II, the arm 34 and" the grid rods 33 are moved toward their minimum tension position, shown in dotted lines in Figs. 2 and 3.

When the winding of the cone is begun, the deflecting means 33 is fully advanced" into its maximum tension position illustrated in full lines in Fig. 2. As the winding of the cone proceeds, the diameter of the cone is increased by accumulation of wound yarn on the cone. The percentage variation in the linear speed of the yarn, caused by traversing the yarn between the large and small ends of the cone, gradually decreases as the yarn builds up on the cone. To compensate for this reduction in the speed variation, the deflecting means33 is gradually withdrawn to-its minimum tension position illustrated in .full lines in Fig. 3. As the winding proceeds,

the deflecting means 38 is withdrawn by means of the cam 58. The winding form I2 is moved away from the winding drum I 3 as the diameter of the cone ll increases, and the rock shaft I8 is thereby turned counterclockwise. The link 60 gradually turns the cam 58 counterclockwise toward its minimum tension position illustrated in dotted lines in Fig. 2. The follower roller 65 rides down the cam by virtue of the force of the spring 68. When the winding of the cone is nearly complete, the grid rods 39 are withdrawn to such an extent that the yarn no longer follows a serpentine path around the rods 33 and 39 when the rods 33 occupy their maximum tension position. However, the rods 33 continue to de flect the yarn around the

guide members

25 and 26, as shown in Fig. 3.

' By meansof this invention, satisfactory cones may be wound for use in situations, such as in the knitting industry, where substantially uniform density is required.

I claim as my invention: 1. In a machine for winding yarn on cones,

a rotatable conical winding form, traversing means adjacent the form for traversing the yarn back and forth along the form, means to guide the yarn along a path to the traversing means, a first movable tensioning member to deflect the yarn from its path in one direction to provide frictional tensioning, means operated by the traversing means to move the first tensioning member back and forth to increase the frictional tensioning as the yarn is traversed toward the small end of the conical winding form. a second member movable adjacent the first member to deflect the yarn in the opposite direction for changing the amount of variation in the tensioning caused by the back and forth movement of the first member, and means to move the second member in a direction to reduce the variation in tensioning in response to accumulation of wound yarn on the form, in order to maintain substantially constant winding tension on the yarn.

2. In a machine for winding yarn on cones, a winding drum having a continuous yarn traversing groove running from one end of the drum to the other and back again in one revolution, a conical winding form, movable means rotatably holding the form in frictional driving engagement with the drum, means to guide the yarn along a path to the drum, a first movable tensioning member to deflect the yarn from its path in one direction to provide frictional tensioning, means operated by the winding drum to move the first member back and. forth to increase the frictional tensioning as the yarn is traversed toward the small end of the conical winding form, a second tensioning member movable adjacent the first member for deflecting the yarn in the opposite direction to change the amount of variation in the tension caused by the back and forth movement of the first member, and means operated by the movable means to move the second member in a direction to reduce the variation in tensioning as the winding form moves away from the drum due to accumulation of wound yarn on the form, in order to maintain substantially constant winding tension on the yarn.

3. In a machine for winding yarn on cones, a rotatable conical winding form, traversing means adjacent the form for traversing the yarn back and forth along the form, means to guide the yarn along apath to the traversing means, a tensioning device to maintain substantially constant 6 winding tension on the yarn including first and second deflecting means on opposite sides of the yarn path, means operated by the traversing means to move the first deflecting means toward and away from the second as the yarn is respectively traversed toward and away from the small end of the conical form, and means to withdraw the second deflecting means from the first in response to accumulation of wound yarn on the form in order to reduce the variation in tension produced by the back and forth movement of the first deflecting means.

4. In a machine for winding yarn on cones, a conical winding form, a grooved winding drum to traverse the yarn back and forth along the form, movable means holding the form for rotation in frictional driving engagement with the drum, means to guide the yarn along a path to the drum, a tensioning device to maintain substantially constant winding tension on the yarn including first and second deflecting means on opposite sides of the yarn path, means operated by the Winding drum to move the first deflecting means toward and away from the second as the drum respectively traverses the yarn toward and away from the small end of the conical form, and means operated by the movable means to withdraw the second deflecting means from the first in response to building up of wound yarn on the form in order to reduce the variation in tension produced by the back and forth movement of the first deflecting means.

5. In a machine for winding yarn on cones, a conical winding form, a grooved winding drum to traverse the yarn back and forth along the form, a rockable arm holding the form for rotation in frictional driving engagement with the drum, means to guide the yarn along a path to the drum, a tensioning device to maintain substantially constant winding tension on the yarn including first and second deflecting means on opposite sides of the yarn path, means including a cam driven by the winding drum to move the first deflecting means toward and away from the second as the drum respectively traverses the yarn toward and away from the small end of the conical form, and means including a cam driven by the rockable arm to withdraw the second deflecting means from the first in response to building up of wound yarn on the form in order to reduce the variation in tension produced by the back and forth movement of the first deflecting means.

-6. In a machine for winding yarn on cones, a winding drum having a continuous yarn traversing groove running from one end of the drum to the other and back again in one revolution, a conical winding form, movable means holding the form for rotation in frictional driving engagement with the drum, means to guide the yarn along a path to the drum, a tensioning device to maintain substantially constant winding tension n the yarn including first and second defleeting means on opposite sides of the yarn path, means operated by the winding drum to move the first deflecting means toward and away from the second as the drum respectively traverses the yarn toward and away from the small end of 7. Ir1- a machinefor winding yarn on cones, a winding-'drum having a continuous yar-n groove traversing the drum from oneend to the other andback again in onerevolution, a conical Wind'- ingform, movable means rotatably holding the form in frictional driving engagement with the drum' meansto guide-the yarn along a path to the; drum, first and'secondmovable meshing grids for tensioning theyarn by deflecting it, inanoppositedireetion from its path, means operated by the winding; drum to move the first grid in a tension increasing direction as the drum traverses thev yarn toward the small end of the conical form, and means operated by the movable means to;mo;ve,th e,second grid in a. tension reducing direction asrthe winding form moves away from the rum due to building uplofwound yarn onthe form, in order to maintain,substantiallyconstant winding tension on-the yarn.

8;. In amachine for winding yarnon cones, a conical winding form, a grooved Winding drum toftraverse the yarn along the form, movable means, rotatably holding the form in frictional driving engagement with the drum, means to guide the yarn along a path to the drum, first and second movable meshing grids for tensioning the yarn by deflecting it in opposite directions from-its path, means operated by the winding drum to move the first grid in a tension increasingdirection as the drum traverses the yarn towardthe small endof the form, and means operated by the movable means to move the second grid ina tension reducing direction as the winding form moves away from the drum due to building up of wound yarn on the form, in order to maintain substantially constant winding tension on the-yarn.

9. In a machine for winding yarn on cones,

awinding drum having a continuous yarn groove the drum. first and second movable meshing grids for tensioning the yarn by deflecting it in opposite directions from its path, means including a cam driven by the winding drum to move the first grid in a tension increasing direction as the drum traverses the yarn toward the small end of the conical form, and means operated by the movable means to move the second grid in a tension reducing direction as the winding form moves away from the drum due to building up of wound yarn on the form, in order to maintain substantially constant winding tension on the yarn;

10.sIn a machine for. winding yarn on. cones, a winding drum having a continuous yarn groove traversing the drum from one end to the other and back againin one revolution, a conicalwind- 'ing form, a, rockable arm holding the form for rotation in frictional driving engagement with the, drum, means to guide the yarn along a path .to, the drum, first and second movablev meshing grids. for tensioning the yarn by deflecting it in opposite directions from its path, means operated by the winding. drum to move the first grid in a. tension, increasing direction as the drum traverses the yarn toward the small end of the formmpves away from the, drum due to building of wound, yarn on the formin order to maintain substantially constant winding tension on the yarn.

11. In a machine for winding yarn on cones, a rotatable conicalwinding form, a Winding drum adjacent the form to traverse the yarn along the form, means to guide theyarn along a path to the drum, first and second movable meshing grids for tensioning the yarn by deflecting it in opposite directions from its path, means operated by the winding drum to move the first grid in a tension increasing direction as the drum traverses the yarn toward the small end of the form, and means to move the second grid in a tension reducing direction in response to accumulation of wound yarn on the form, in order to maintain substantially constant winding tension on the yarn. I

12. In a machine for winding yarn on comes, a rotatable conical winding form, awinding adjacent the form to traversethe yarn alongthe form, means to guide the yarn along a p thto the drum, first and secondrotatablearms, first and, second sets of meshing 'grid rods fon'the respective arms, the rods being positioned to tension the yarn by deflecting it from its path in serpentine fashion bymovement of the sets of rods in opposite directions, means operated by the winding drum to move the first set of rods back and forth for increasing the Winding tension as the drum traverses the yarn toward the small end of the conical form, and means responsive to building up of wound yarn on the form to move the second set of rods in a direction to reduce the variation in tension produced by the back and forth movement of the first set, in order to maintain substantially constant winding tension on the yarn,

13. In a machine for winding yarn on cones,

a rotatable conical winding form, traversing means adjacent the form for traversing the yarn back and forth along the form, means to guide the yarn along a path to the traversing means including two guiding members spaced along the path on the same side thereof and extending transversely thereto, a first rotatablearm carry.- ing a first set of grid rods adjacent, the yarn path between the guiding members on the opposite side of the path from the members for movement to deflect the yarn toward the members for tensioning the yarn, means operated by the traversing means to move the first set of rods back and, forth to provide increased tensioning as the yarn is traversed toward the small end of the conical winding form, a second rotatable arm carrying a second set of grid rods movable into meshing relation with the first set to deflect the yarn in serpentine fashion around the rods of the two sets for changing the amount of variation in tensioning produced bythe back and forth movement of the first set of rods, and means to move the second set, of rods in a. direction to reduce the variation in tensioning inresponse to building up of wound yarn on the form, n order to maintain substantially constant windmg tension on the yarn, v

14. In a machine for winding yarn on cones a rotatable conical winding form,v I traversing means adjacent the. formfor traversing the yarn back and forth along the form, means to guide the yarn along a path to the traversing means a first movable gridfor deflecting the yarn from its path inone directionto provide frictional tenlom g of the yarn, means op ed y thetaersi s ea s, o m r t rid back and forth f r increasing the. fricti n tfinsionmgv as, the

yarn is traversed toward the small end of the conical winding form, a second grid movable into meshing relation with the first grid to change the amount of variation in the tensioning caused by the back and forth movement of the first grid, and means to move the second grid in a direction to reduce the variation in tensioning in response to accumulation of wound yarn on the form, in order to maintain substantially constant winding tension on the yarn.

15. In a yarn winding machine, a winding form, a traversing drum, movable supporting means holding the form for rotation in frictional driving engagement with the drum, means to feed yarn along a path to the drum, a yarn tensioning device acting on the yarn along its path, the device having a movable member for changing the tensioning, and means operated by the movable supporting means for moving the movable member to reduce the tensioning as the form moves away from the drum due to building up of wound yarn on the form.

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

UNITED STATES PATENTS Number Name Date 1,025,988 Marlow May 14, 1912 1,863,280 Parks June 14, 1932 1,994,403 Reiners et a1 Mar. 12, 1935 2,555,045 Lind May 29, 1951