US981950A - Unwinding device. - Google Patents

Description

C. RYDEN.

unwmnme 1mm.

APPLICATION FILED OCT 23, 1909. 981,950. Patented Jan. 17, 1911.

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Pater used Jan. 17, 1911.

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G. RYDEN.

UNWI'NDING DEVICE. Arrmonron FILED 0012 as, i9o9.

981,950. PatentedJan.17,1911.

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G. RYDEN.

UNWINDING DEVICE.

APPLICATION FILED 0012a, 1909.

981,950. Patented Jan. 17,1911.

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CLAES RYDEN, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO UNIVERSAL WINDING COMPANY, A CORPORATION OF MAINE.

UNWINDING DEVICE.

Specification of Letters Patent.

Application filed October 23,, 1909.

Patented Jan. 17, 1911.

Serial No. 524,196.

To all whom it may concern:

Be it known that I, CLAES RYDEN, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Unwinding Devices, of which the following is a specification.

My invention relates to devices for controlling the unwinding of yarn or thread from reels, spools or other supply-holders in delivering the same to winding or similar machines.

My improvement consists in providing means for automatically starting the rotation of the supply-holder without strain on the yarn and for controlling its speed of rotation according to the draft on the yarn to prevent a too free delivery or overrunning.

My invention is fully described in the fol lowing specification, illustrated by the accompanying drawings, in which:

Figure l is a side elevation of my 1111- proved device shown as applied to a winding machine and arranged to deliver yarn fro-1n the skein held on a reel or swift above the machine; Fig. 2, an enlarged detail view of the essential elements of the controlling mechanism; Fig. 3, a front elevation of the device showing the skein-holding reel in position for delivering the yarn; Figs. 4 and 5, views showing modifications in the arrangement of the controlling device.

In Fig. 1 the winding machine is represented at A and consists of a mechanism for winding filling bobbins or shuttle cops for use in loom shuttles. The bobbin 6 is wound on a rotating spindle 0 with the coils of yarn laid by a thread-guide cl traversed by a reciprocating bar 0. The bar a is connected by the link 7 to an oscillating lever g which is oscillated by a rock-shaft it. The winding spindle is rotated from a drive-shaft 2' through the skew-gears j and 7c. The winding machine here shown is of a type previously disclosed in the art and forms no part of the present invention, being described only to show the mode of operation of the new mechanism in relation thereto. Moreover, the present invention is not limited to use in connection with this form of machine as it might be applied to various styles of winding machines or to other teX- tile devices to which a supply of yarn is to be delivered.

In machines of the particular form here shown the winding spindles are generally arranged in multiple, projecting from the sides of the frame a and my new device is usually applied with the supply-holders carried in brackets supported on the machine frame above the spindles. One supply holder is required for each winding spindle and these could also be held below the machine, according as best suits the convenience of the operators. I have preferred to show the supplies arranged overhead and adapted to deliver the yarn from skeins held on the rotatable reels or swifts O, as illustrated in Figs. 1 and 3. I

In Fig. 1 the A-shaped bracket L is secured to the *frame a of the machine and a suitable number of these brackets is used along the length of the frame to support a horizontal square rod or bar Z held in pockets at the top of the brackets. The bar Z serves as a means for supporting the arms M-M, etc., which carry the bearings for the supply- .holders, and preferably these arms are secured to the bar in pairs. At the lower ends of the arms M are bearing faces m, see Fig. 2, with shoulders m which abut the sides and top of the bar Z and the lug m on one arm contacts with a similar lug on the opposite arm. This arrangement provides for clamping the two arms together to bind on the bar 6 by means of the bolt 12, see Fig. 1.

At their upper ends the arms M are formed with sockets m adapted to receive the pivots on which the supply-holders rotate. These sockets are preferably formed with flaring mouths and guide-ways for di-- supply-holder I have preferred to show inthe drawings, is of usual construction having a hub 0 and spokes 00 radiating therefrom and arranged in pairs, see Fig. 3. The outer ends of the spokes of each pair are connected by bands 0 on which the skein S is held. Projecting from either end of the hub of the reel are pivot pins 70, 79 adapted to the sockets m and serving as trunnions to support the reel 0 rotatively in its bearings. The reel is held between two arms M, M, as shown in Fig. 3, and preferably the pivot pins are formed with shoulders 29, 10 which abut the sides of the arms to prevent side play. in the bearings. Each arm 1W1 is formed with bearings on both of its opposite sides so that a reel can be held between each two arms of the series arranged along the length of the machine. The two bearing sockets m m of each arm are separated by a web portion m of the arm, and leading up to each socket is a curved flange or lip m An oppositely curved flange m leads down into the socket m" from above. These flanges provide guide-ways for directing the trunnions 7) into their bearings. The operator has only to carry the reel into position between the upper ends of the arms until the trunnions strike these guides when fur ther movement of the reel will be directed to seat the trunnions in the sockets.

To start the rotation of the reel and control its speed I make use of a novel arrangement of mechanism, the preferred form of which is now described: The ends of the hub 0 of the reel are formed with portions 0 0 which are preferably covered with metal caps and serve as brakedrum on which the braking element acts to control the rotation of the reel. The braking means consists of av flexible, friction band or strap '15 which may be constructed of leather, fabric, thin steel, or other suitable material. @ne end of the band is secured to the end of a coiled spring a, see Fig. 2, which is fastened to the end of a threaded stud Q} screwed into the end of a cylindrical casing 10 formed on, or secured to, the end of the arm M. The casing to in closes the spring a to protect it from being hindered in its action and to prevent loose ends of the yarn from catching in it. The tension of the spring a can be adjusted by adjusting the stud w, and a check-nut 00 serves to lock the stud in its adjusted position. The opposite end of the band t is secured to an extension of an arm 2 which acts as a take-up element controlled by the tension of the delivering yarn y. The arm 2 is preferably formed of fiat, sheet metal, tempered to adapt it to bend as a spring element. One end of the arm is fastened to a cylindrical member or hub 3 which is pivoted on a stud 4t, screwed into a bearing on the arm M, and held between a washer 5 and the boss 6 on the arm. An extension 7 of the arm 2, also fastened to the hub 3, is bent in a curve at S and extends at substan tially right-angles to the main arm 2 to form an auxiliary spring element. Projecting from the upper end of the arm M is a finger m formed with a lug m through which ex tends an adjusting-screw 9. The end of the spring extension 7 bears on the end of the screw 9 and by adjusting the screw the tension of the spring element can be regulated as desired. The knurled head 10 on the screw 9 provides a convenient means for adjusting the screw with the fingers and a i I l check-nut 11 is adapted to be set against the lug m to lock the screw from accidental turning.

A V-shaped truss-like arm 12 is secured to the arm 2, projecting upward toward the brake-drum 0 of the supply-holder with one of its sides 13 substantially perpendicular to the arm 2. This may be formed by bending up a portion of the extension 7 and securing it to the main arm 2 at 14: by rivets or other suitable fastenings, or the arm 12 might be made in a separate piece. A pin 15 driven into a boss on the arm M is adapted to c0ntact with the side 13 of the arm 12 and'serves as a stop to limit the movement of the arm 2 under the spring action of the extension 7. The end of the band t is secured to the arm 12 by a clamp 16 held by a set screw 17 which binds the band between the clamp and the arm. By releasing the set screw the clamp 16 can be adjusted along the arm 12 to vary its point of connection with the arm and regulate the operative length of the band 2/. At the lower end of the arm 2 is a cross-arm 18, which may be either formed by bending out the arm 2 at right angles to the main portion or by riveting on a separate piece, as shown in Fig. 3. The crossarm 18 has its end bent to form a loop 19 through which the yarn y leads from the skein S, see Figs. 2 and 3. From the loop 19 the yarn leads down to a springarm 2O fastened to the frame of the machine A and having a pigtail 21 attached to its upper end through which the yarn draws, and thence it leads direct to the thread-guide (Z of the machine. The arm 20 provides an auxiliary yielding element to relieve the strain on the yarn when the latter is taken up with a sudden pull in starting the machine.

The arm 2 and its several extensions might be constructed of round wire bent in the form required; but the particular method of constructing it of flat stock, as described above, is the preferable form of structure, since it provides an element which is rigid enough to prevent side play but at the same time is adapted to play up and down to follow the inequalities in tension of the delivering yarn.

The mode of operation of the above described device is as follows: The operator removes the empty swift or reel 0 from its bearings in the arms M, M and places the skein S upon it by stretching the latter over the bands 0 0 etc, these being adjusted on the spokes of the reel to keep the coils of the skein taut. The reel is then placed in its bearings by carrying the trunnions p, p on its hubs against the guiding flanges on the arms M, M which guide the trunnions into the sockets m m As the reel is carried into position in its bearings the brake-drum 0 at one end of the hub of the reel will be carried under the brake-band t and the lat ter will be held in frictional contact with the drum by the spring a. The hub 0 of the reel being formed with brake-drums at both ends provides for using the reel either way in its bearings so that when the operator applies the skein it is not required to use care in placing the skein to unwind in a certain direction. hen the reel is placed in its bearings, however, it is so arranged that the free end of the skein will lead from the back end, as shown in Fig. 1. The loose end is then drawn down through the loop 19 on the cross-arm at the end of the arm 2, this loop being offset from the main arm 2 so that the yarn will not chafe on the edge of the latter. The yarn is then carried down through the auxiliary-guide 21 and thence to the winding spindle 0 of the machine and through the thread-guide (Z. The winding machine is neXt started to operate and as the winding spindle takes up the yarn the spring arms 20 and 2 will yield slightly to relieve the sudden pull on the skein, as shown by dotted lines in Fig. 1. The arm 2 being longer than its extension 7 is resilient enough to bend slightly without bending the spring element 7 and under normal tension of the yarn when the reel is rotating, only the arm 2 and arm 20 will yield. Before the reel begins to rotate, however, the sudden draft on the yarn at the start of the winding will cause the whole arm 2 to move bodily, as shown in Fig. 2, against the tension of the spring member 7. This bodily movement of the arm 2 moves the arm 12 downward and draws down the band i against the tension of its spring a. This movement of the band 2 which draws over the brake-drum on the hub of the reel is communicated to the drum to start the rotation of the reel. In other words, when the arm 2 is carried bodily downward by the pull of the yarn it pulls on the end of the band t which through its wrapping effect on the hub of the reel serves to impart a rotary motion to the latter. In this way the inertia of the reel is overcome and the rotation of the reel is initiated automatically through positive means instead of depending on the direct pull of the yarn to start it turning. This action of the device is the essential feature of my invention and is an important improvement in the art. Heretofore, where attempts have been made to deliver yarn. from skeins or heavy spools the chief ditiiculty has been in overcoming the inertia of the mass of the supply-holder in starting its rotation. .Vith my new arrangement the rotation of the supply-holder is started by the movement of the arm 2. In the same way, when the supply-holder is running, if the yarn catches or tangles in the skein the resistance to its delivery will cause the arm 2 to move downward under the effect of the extra tension on the yarn and this downward movement will pull the brake-band down and rotate the supplyholder ahead to free the yarn from its hindrance in the skein. When the abnormal resistence to delivery of the yarn is relieved the arm 2 swings back into its normal position with the portion 13 against the stop 15 and with the elements in this position the brake-band is held by the spring a with a slight frictional contact on the drum 0 As the arm 2 moves back the band if is drawn back by the tension of the spring a and this action serves as a braking effect to slow down the rotation of the supply holder to its normal speed. The spring a is adjusted to give a contact of the brake-band which allows the supply-holder to rotate freely under the impulse of the draft on the yarn but suflicient braking force is exerted by the band to prevent a too free rotation which would cause overruns and tangling of the yarn. By means of this arrangement the tension of delivery can be adjusted as required for heavy or light yarns and, furthermore, any abnormal resistance to delivery is compensated for by the action of the arm 2 in giving an added impulse to the rotation of the supply-holder through the positive mechanical devices described. In addition to this, the acceleration of speed of the sup ply-holder is also checked by the retraction of the brake-band when the resistance to delivery is relieved so that a smooth even delivery is provided for without check or hindrance under influence of the yarn catching or dragging in the skein.

In Fig. 4t 1 have shown an alternative arrangement of the controlling mechanism for the supply-holder. As before stated, my device is adapted for other forms of supplyholders besides the reel shown in the drawings. For instance, it might be applied for use with warp-beams or spools and where a relatively heavy spool is employed it has been found advantageous to make the rotating means for the supply-holder more positive. To provide for this I make use of the ratchet-and-pawl arrangement now described.

Referring to Fig. 4, the spool, beam or other supply-holder in this instance carries a. ratchet-wheel 27 in addition to the brakedrum 0 Securedv to the arm 12 of the controlling arm 2 at 28 is a spring pawl 29 having its opposite end bearing on a pin 30 driven into the arm M. An abutment or toe 31 on the pawl 29 is adapted to engage the teeth of the ratchet 27. Normally the too 31 is beyond the range of the ratchetwheel with the pawl held back against its spring action by its extremity bearing on the pin 30. When the arm 2 is rock-ed or swung downward under abnormal tension on the yarn the toe 31 will come into engagement with the teeth of the ratchet wheel 27 and the latter will be rotated thereby to rotate the supply-holder for the purpose heretofore described. The same arrangei'nent of brake-band If is here used for applying a resisting force to the rotation of the supplyholder, as before described, except that suspended weights 32 are substituted for the spring attached to the end of the band I In Fig. 5 I have shown still another modification of the rotative means for the supplyholder. In this type of device the spool is shown supported to rotate on a stationary spindle, such, for instance, as the rod 25 held in bearings on the arms M by the set screw 26. As here illustrated, the arm 2 has an extension 3% which is formed with an arc-shaped portion 35 positioned adjacent the periphery of the brake-drun'i 0. The portion 35 of the extension 3 L is provided with a friction element 36 adapted to contact with the face of the brake-drun'i and this element is preferably made adjustable toward and away from the drum through the following arrangement: A thin metal strap 37 is rivet-ed to the member 34L at 38 and at its opposite end a stud or rivet 39 extends from the strap through a longitudinal slot 40 in the member 35. A thumb-screw ll is screwed through a bearing piece 42 secured to the member 34 with its end bearing on the under side of the strap 37. The friction element 36, which may be of any suitable flexible material, such as leather, fiber, or rough fabric, is secured to the face of the strap 37 and when the thun'ib-screw ll is turned the strap is adjusted toward or away from the brake-drun'i to regulate the amount of contact of the friction element 36 with the peripheral face of the drum. The rivet 39 slides in the slot 40 to allow the movement of the strap 37 under action of the screw 41. The arm 2 is limited in its movement under action of the spring 7 by the lug 44 and movement in the opposite direction is limited by the lug +t5, both lugs adapted to contact with the side 46 of the extension 34 and being preferably formed as parts of the arm M. The operation of this form of device is substantially the same as that of the ar rangement first described: When the arm 2 moves downward under the effect of abnormal tension on the yarn the friction element 36 will be drawn along the peripheral sur face of the brake-drum 0 to impart a ro tative impulse to the supply-holder, and when the excessive tension on the yarn is relieved the arm 2 will move upward again, under influence of the spring member 7, to check the increased speed of the supplyholder. The friction element 36 is adjusted to give the proper contact on the brakedrum to regulate the turning of the supplyholder under normal conditions so that the latter will not rotate too freely.

I am aware that braking devices for regulating the rotative speed of spools, reels and other supply-holders have long been used and are well known in the art; but previous to my present disclosure no means have been provided for positively rotating the supplyholder ahead at the start of the unwinding of the yarn and at times when an abnormal resistance to delivery is encountered. The arrangement for effecting this latter result is the principal feature of my invention and is a meritorious improvement in devices of this class. Heretofore, it has been practically impossible to deliver fine yarn from reels or heavy spools at high speed because the sudden draft at the start of delivery would break the yarn before the inertia of the supply-holder could be overcome; and when any abnormal resistance to delivery was encountered during the rotation of the supply-holder the speed of rotation could not be accelerated fast enough by the pull on the yarn to relieve this hindrance to delivery.

My invention is particularly adapted for use with the class of winding machine here shown, because, in winding on the tapered nose of a bobbin the lineal speed of the yarn varies considerably between the points of greatest and least diameter. Hy improved device compensates for these fluctuations in of the supply-holder to deliver the yarn at the required rate and with a uniform tension. The device is not limited solely to the use described, however, as it might be applied for use with any form of wound up supply such as spools or reels of tape, wire, or other attenuated material.

Various modifications, besides those shown, might be made in the structure and arrangement of the parts of the mechanism which would come within the scope of my invention, therefore, without limiting myself to the exact form specified,

lVhat I claim is 1. In a device for controlling the unwinding of yarn, the combination with a rotatable supply-holder, of a take-up arm controlled by the delivering yarn, and means connecting said arm with the supply-holder to impart a positive rotative impulse to the latter when the arm is moved by the draft on the yarn.

2. In a device for controlling the unwinding of yarn, the combination with a rotatable supply-holder, of an arm controlled by the tension of the delivering yarn, and means on said arm to control the rotation of the supply-holder, said means adapted to impart a rotative impulse to the supplyholder when the arm is moved under the effect of abnormal tension on the yarn.

3. In a device for controlling the delivery of yarn from a rotating supply, the combi- 1 nation with the supply-holder, of a movable daft 011 the yarn and regulates the turning v element controlled by the tension of the delivering yarn, and means on said element whereby its movement in one direction imparts a rotative impulse to the supplyholder, and its movement in the opposite direction exerts a braking effect 011 the supplyholder to check the rotation of the latter.

4:. In a device for controlling the delivery of yarn from a rotating supply, the combination with a rotatable supply-holder having a brake-drum, of a movable arm controlled by the tension of the delivering yarn, means connected with said arm and adapted to contact with the brake-drum to cause resistance to the rotation of the supply-holder, said means adapted to be moved by the arm to impart a rotative impulse to the supplyholder. 1

In a device for controlling the delivery of yarn from a rotating supply, the combination with a rotatable supply-holder, of a brake-drum on said supply-holder, a movable element actuated by the tension of the delivering yarn, and friction means operated by said element to contact with the brake-drum to check the rotation of the supply-holder when moved in one direction and to impart an impulse to rotation to the supply-holder when moved in the opposite direction.

6. In a device of the class specified, the combination with a rotatable supply-holder, of a braking element on said supply-holder, means to contact with said element to check the rotation of the supply-holder and devices to operate said means to apply a rotative impulse to the supply-holder to unwind the supply.

'7. The combination with a rotatable supply-holder, of a movable element controlled by the draft on the yarn, and means actuated by said element to imparta rotary impulse to the supply-holder to unwind the yarn.

S. The combination with a rotatable supply-holder, of means operated by the running yarn and controlled by the draft of the yarn to impart a rotary impulse to the supplyholder to unwind the yarn.

9. The combination with a rotatable su-pply-holder, of a brake-drum on the supplyholder. a friction element engaging said brake-drum, and a pivoted arm arranged to move the friction element to impart a rotative impulse to the supply-holder and to normally maintain said element in contact with the brake-drum to cause resistance to the rotation of the supply-holder.

10. The combination with a rotatable supply-holder, of a brake-drum on the supply holder, a friction band engaging the periphery of the drum, means to hold one end of the band under resilient tension and means to move the band bodily around the drum to impart an impulse of rotation to the supply-holder to unwind the supply.

11. The combination with a rotatable supply-h0lder, of a brake-drum on the supplyholder, a friction element engaging the periphery of the drum, resilient means to hold said element against the drum, and means to move the friction element in the direction of rotation of the supply-holder to impart an impulse of rotation to the latter.

12. T 1e combination in a controlling device for regulating the unwinding of yarn, with a rotatable supply-holder, of a brakedrum on the supplyholder, a friction band arranged to wrap around the periphery of the brake-drum, a spring to hold one end of the band, a pivoted arm connected to the opposite end of the band, and-means to limit the movement of the arm in one direction to retain the band in contact with the drum under tension of its spring, said arm controlled by the tension of the yarn and adapted to be moved in the opposite direction to move the band to impart a rotative impulse to the supply-holder.

13. In a device for controlling the unwinding of yarn, the combination of a rotatable supply-holder, a brake-drum rotatable with the supply-holder, a friction band engaging the periphery of the drum, resilient means to hold one end of the band, a pivoted arm connected to the opposite end of the band, resilient means to resist the movement of the arm in one direction and a stop to limit the movement of the arm under influence of said means.

1a. In a device for controlling the un winding of yarn, the combination of a rotatable supply-holder, a. brake-drum rotatable with the supply-holder, a brake-band engaging said drum, resilient means connected with one end of the band, a pivoted arm 2 adapted to be moved under influence of the delivering yarn and connected to the brakeband, a spring to control the movement of the arm and means to adjust the tension of said spring.

15. In a device for controlling the unwinding of yarn, the combination with a rotatable supply-holder, of a brake-drum rotatable with the supply-holder, a friction band engaging the periphery of the brake-drum, resilient means for holding one end of the band, devices to adjust the tension of said means, a pivoted arm adapted to be swung under action of the delivering yarn, a spring to resist the swinging movement of the arm, and means to adjustably secure the opposite end of the band to the arm to regulate the frictional contact of the band on the brakedrum.

16. The combination of a rotatable supply-holder, a brake-drum rotatable with the supply-holder, a friction band engaging the periphery of the drum, means to hold one end of the band under tension, a spring arm 2 formed of fiat metal, an extension 7 on Said arm bent to form a spring element, an arm 12 projecting substantially perpendicu larly from the arm 2, and a clamp to adjustably secure the end of the band to the arm l2.

17. The combination with the arms M formed with pockets m on either side and curved guiding flanges leading to said pockets, of a supply-holder having trunnions p fitted to said pockets and brake-drums 0 and means carried on the arms for engaging one of the brake-drums to control the rotation of the supply-holder.

18. The combination with the arms M formed with bearings, of a supply-holder adapted to rotate in said bearings, brakedrums on said supply-holder, a brake-band for engaging the periphery of the brakedrum, a spring to hold one end of the band, and means to adjustably secure the spring to the arm M consisting of a tubular casing on said arm, and a stud screwed into the end of the casing and fastened to the spring.

19. A controlling member for regulating the braking mechanism of unwinding devices, comprising an arm 2 of flat spring metal having a yarn guide at one end and a hub at the opposite end, an extension 7 of said arm-secured to the hub and bent at substantially right angles to the arm 2 to form a spring element, and a V-shaped truss-like arm 12 projecting from the arm 2.

20. The combination in a controlling device for supply-holders, with a rotatable reel 0 having trunnions j) and brake-drums 0 arms M having sockets to receive said trunnions, a cylindrical casing w at the end of one of the arms, a coiled spring secured to one end of the casing, a flexible band t fastened to said spring and adapted to engage the periphery of the brake-drum, a spring arm 2 pivoted on the arm M- and formed with an arm 12 to which one end of the band 6' is secured, and a spring element between the arm 2 and the arm M to control the movement of the arm 2.

In testimony whereof I affix my signature in presence of two witnesses.

CLAES RYDEN.

lVitnesses:

ARTHUR I. HARVEY, GRACE \V. BROWN.

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