US2371620A - Device for controlling the tension in the yarns being wound upon a beam in a warping or beaming plant - Google Patents

Description

March 20, 1945. HARTUNG 2,371,620

DEVICE FOR CONTROLLING THE TENSION IN THE YARNS BEING WOUND UPON A BEAM IN A WARPING OR BEAMING PLANT Filed Aug. 20, 1942 5 Sheets-Sheet 1 INVENTOR H1: AM/FTVUNG ATTORNEY March 20, 1945. HARTUNG 2,371,620

DEVICE FOR CONTROLLING THE TENSION IN THE YARNS BEING WOUND UPON A BEAM IN A WARPING OR BEAMING PLANT Filed Aug. 20, 1942 5 Sheets-Sheet 2 INVENTOR Ala/v5 HARTUA G ATTORNEY March 20, 1945.

m Gm N ww R H M m DEVICE FOR CONTROLLING THE TENSION IN THE YARNS BEING WOUND UPON A BEAM IN A WARPING OR BEAMING PLANT 5 Sheets-Sheet 3 INVENTOR Han s H/wru/vc;

:2 ATTORNEY March 20, 1945. H. HARTUNG r 2,371,620

DEVICE FOR CONTROLLING THE TENSION IN THE YARNS BEING WOUND UPON A BEAM IN A WARPING QR BEAMING PLANT Filed Aug. 20, 1942 5 Sheets-Sheet 4 INVENTOR Hmvs HARTUNG [ATTORNEY March 20, 1945. H. HARTUNG. 2,371,620

DEVICE FOR CONTROLLING THE TENSION IN THE YARNS BEING WOUND UPON A BEAM IN A WARPING 0R BEAMING PLANT Filed Aug. 20, 1942 5 Sheets-Sheet 5 ATTORNEY Patented Mar. 20, 1945 I DEVICE FOR CONTROLLING THE TENSION IN THE YARNS BEING WOUND UPON A BEAM IN A WARPING OR BEAMING PLANT Hans Hartung, Elysburg, Pa., assignor to Robert Reiner, Incorporated, Weehawken, N. J.

Application August 20, 1942, Serial No. 455,418

Claims.

My invention relates to a warping or beaming lant for the winding of yarns upon a beam, and more particularly to a controlling device for the control of the tension in the yarns being wound upon a beam' in a warping or beaming plant.

It is desirable that, during the warping or beaming of yarns, the tension in the yarns is maintained at a substantially constant value. During the winding or beaming of non-elastic ya'rns or yarns of low elasticity, this feature may be obtained by controlling the travelling speed of the yarns at a substantially constant value. If, however, elastic yarns, such as certain worsted yarns or latex yarns, are wound upon a beam, this control of the travelling speed of the yarns proves to be insuflicient, as the elasticity of these yarns permits an alternate stretching and slackening of the yarns, so that the tension inthe yarns varies to a great extent.

One object oi my invention is to provide a controlling device for controlling the tension in elastic yarns being wound upon a beam in a warping or beaming plant in such a way, that, during the warping. a substantially constant tension in the yarns is maintained.

Another object of my invention is to provide such a controlling device, which may be easily adjusted to the requirements of yarns of various surface characteristics.

A further object of my invention is to provide such a controlling device by means of which a predetermined tension in the yarns may be adjusted.

Still another object of my invention is to provide such a controlling device, by means of which the warping or beaming plant may be arrested automatically as soon as the tension in the yarns exceeds a predetermined extreme high or low degree.

In order to carry out my invention in practice I provide a device for controlling the tension in the yarns of a warp being wound upon a beam in a warping or beaming plant comprising: a rotatable cylindrical feeding drum for feeding yarns of the warp to the beam upon contact between such yarns and the feeding drum, and controlling means in engagement with the yarn of the warp, said controlling means being responsive to variations in the tension of yarns of the warp and being arranged for displacing such yarns upon a variation in the tension thereof in planes substantially perpendicular to the longitudinal axis of the feeding drum and changing thereby the length of the arc of contact between such yarnsand the cylindrical surface of the feeding drum so as to control the feeding of the yarns by said feeding drum for maintaining a substantially constant tension in the yarns of the warp during the warping thereof.

The above mentioned objects and advantages as well as other objects and advantages will be more fully disclosed in the following specification reference being had to the accompanying drawings forming part of this specification, wherein:

Fig. 1 is an elevational view of a warping plant according to an embodiment of the invention including a creel, a controlling device for the control of the tension of the yarns and a warper, the feeding drum of the controlling device being coupled with the pressure roll of the warper,

Fig. 2 is a top plan view of the controlling device and the warper shown in Fig. 1,

Fig. 3 illustrates a tensioning member of the controlling device 'shown in Fig. 1, partly in section,

Fig. 4 is a diagrammatic view of a different embodiment of a controlling device having two feeding drums and two series of tensioning members,

Fig. 5 is a more or less diagrammatic view of Fig. '7 is a diagrammatic view of still another embodiment of the warping plant, wherein the feeding drum of the controlling device is driven by a separate motor, and

Fig. 8 is a more or less diagrammatic view of a beaming plant according to the invention including a creel, a controlling device for the control of the tension in the yarns and a beamer, the feeding drum of the controlling device being coupled with the drive rotating the beam inserted into the beamer.

Referring now to Figs. 1-3, I0 generally indicates a creel, only the end portion of which bein shown in the drawings, I! generally indicates a sectional warper, and Il generally indicates a controlling device for the control of the tension in the yarns l6 travelling from the bobbins l8- of controlling or tensioning rods 28, by means of which the yarns I6 travelling from the bobbins to the beam are subjected to a predetermined substantially constant force. Each controlling rod'28 is held in a bore 38 of a block 32 by means of set screws 34 in such a manner, that one arm of the rod (the right hand arm as viewed in Figs. 1 and 3) is of greater length and weight than the other. Each block 32 is swingably mounted on a transverse 'bar 36 carried by brackets 38 mounted on the frame of the controlling device. Thus, the controlling rods 28 are swingable about the transverse bar 36 independently of each other. Each controlling rod 28 carries an eyelet 48 at each of its ends and is provided with an adjustable weight 42 on its long arm. Each yarn [6 of the warp is threaded through an eyelet 44 of a first series of stationary eyelets carried by the frame of the controlling device, through the two eyelets 48 of one of the series of swingable controlling rods 28 and through an eyelet 46 of a second series of stationary eyelets carried by the frame of the controlling device. The difference in the weight between the long arm and the short arm of a controlling rod 28 and the adjustable weight 42 form a tensioning means or load acting on the long arm of the controlling or tensioning rod 28, which tends to turn same in clockwise direction. Thus, each controlling or tensioning rod subjects the yarn engaged by said rod to a substantially constant force, which may be adjusted to a predetermined degree by an adjustment of the position of theweight 42 on the rod and/or by an adjustment of the relative position between the rod and the block 32. Preferably, the tensioning or controlling rods are made of a light metal and are in the shape of tubes as shown in Fig. 3. As long as, during the warping operation, the tension in the yarns remains at a constant normal value, the controlling rods 28 act as balanced members and remain in the position shown in full lines in Fig. 1. As soon as, however, an unbalanced condition of a balanced member 28 associated with a yarn I6 i created by a change in the value of the tension in said yarn, for example, as soon as the tension in said yarn is increased, the member 28 is swung in counterclockwise direction into the position 28' shown in dash and dot lines in Fig. 1 for an immediate actuation of the controlling device so as to reduce the tension in the yarn to its normal predetermined value, as will be described hereinafter.

As best shown in 'Figs. 1 and 2 a cylindrical feeding drum 48 having a surface layer 58 of felt, rubber or the like is rotatably arranged in bearings 52 mounted on the frame of the controlling device. Preferably, the feeding drum is arranged in such a position relative to the warp yarns 16, that, during the warping operation, its surface is just out of engagement with the warp yarns shown in Fig. 1, as long as the normal tension in the yarns prevails. The feeding drum 48 is coupled with the outgoing-power shaft 54 of a stepless change speed transmission 56, for example a so-called Reeves Drive, by a chain drive 58. Said outgoing-power shaft 54 is driven in a manner known per se by the incoming-power shaft vtwo chain drives 66 and 68. The pressure roll 64 journalled in a support 18 swingably mounted at 12 is urged against the winding 14 on the beam 28 by a load 16 acting on an extension 18 of the support, so that the pressure roll is driven by the winding on the beam. Obviously, an increase in the diameter of the winding on the beam causes a movement of the pressure roll support 18 in clockwise direction about its pivot 12, which, in turn, results in an actuation of a rheostat 88 by a member 8| rigidly connected with the support 18. The rheostat 88 is electrically connected with the motor 22 driving the beam 28 for reducing the speed of the motor 22 in dependence on the increase in the diameter of the winding on the beam, so that a substantially constant circumferential speed of the winding '14 on the beam and, consequently, a substantially constant travelling speed of the yarns 16 are obtained. Therefore, as the winding 14 on the beam rotates at a substantially constant circumferential speed. the pressure roll 64 and the incoming-power shaft 68 of the'stepless change speed transmission 56 coupled with said pressure roll are rotated at a substantially constant speed. During the warping operation the ratio of the number of rotations between the incoming-power shaft 68 and the outgoing-power shaft 54 remains unchanged,

so that the outgoing-power shaft 54 and the feeding drum 48 are rotated at a substantially constant speed. The stepless change. speed transmission 56 is equipped with a hand wheel 82 for a manual adjustment of the ratio of the number of rotations between the incoming-power shaft 68 and the outgoing-power shaft 54. Prior to the warping operation, said ratio is set in such a manner by the hand wheel 82, that the feeding drum 48 may be rotated at a circumferential speed somewhat higher than the travellin speed of the yarns l6.

The operation of the controlling device I4 is as follows: i

As long as the tension in the yarns l6 remains at the predetermined normal value, the controlling rods 28 are in the position shown in full lines in Fig. 1, and the yarns [6 are out of contact with the surface of the feeding drum 48 rotating at a constant circumferential speed higher than the travelling speed of the'yarns. As soon as the tension in a yarn is increased, the controlling rod 28 associated with said yarn is swung in counter-clockwise direction, so that the yarn I8 is displaced in a plane substantially perpendicular to the longitudinal axis of the feeding drum and contacts the surface of the feeding drum to a certain degree depending on the degree of the variation in the tension of the yarn and the degree of the angle, through which the rod 28 is swung. Upon the contact of the yarn with the rotating feeding drum, the latter feeds the yarn to the beam, whereby the tension in the yarn is reduced. As soon as the normal tension in the yarn reaches the normal value, the controlling rod 28 returns into the position shown in full lines in Fig. 1, whereby the yarn i 6 is disengaged from the surface of the feeding drum 48, so that the normal warping conditions are reinstated. The described action of the controlling rod causing a change in the length of the arc of contact between the yarn and the cylindrical surface of the feeding drum is so fast, that, from the practical point of view,

a substantially constant tension in the yarns l6 being wound upon the beam 28 is maintained.

Various yarns have various surface characteristics, which have an influence on the friction between the feeding drum. and the yarns. For example, a satisfactory feeding of one type of yarn may be obtained, if the circumferential duced during the warping operation.

speed of the feeding drum is 5% higher than the travelling speed of the yarn, while another yarn may require a higher circumferential speed of the feeding drum. In order to adjust the controlling device to the various surface characteristics of various yarns, the circumferential speed of the feeding drum 48 may be adjusted by means of the hand wheel 82 of the stepless change speed transmission 58. M

Fig. 4 diagrarmnatically illustrates a different embodiment of a controlling device operating according to the same principle as described above in connection with the controlling device shown in Figs. 1-3. In this case, however, the controlling device has two feeding drums 488 and 48! and two series of controlling rods 288 and 28l arranged above each other. The feeding drum 48| driving the feeding drum 488 through a chain drive 84 is coupled with the pressure roll 84 of the warper through the chain drives 68. 88. the stepless change speed transmission 56 and the chain drive 58. The yarns coming from the creel are divided into two warps I88 and IN, which are simultaneously wound upon ling device having only a single feeding drum 48 and a single series of swingable controlling rods 28 as the device shown in Fig. 1. According to Fig. 5, however, the incoming-power shaft 88 of the stepless change speed transmission is coupled by a chain 88 with the shaft 88 of the motor 22 driving the beam 28. As pointed out above, the speed of the motor 22 is gradually re- Therefore, an automatic change of the ratio between the number of rotations of the incoming-power shaft 88 and the outgoing-power shaft 54 coupled with the feeding drum,- 48 by the chain 58 is necessary. so that the circumferential speed of the feeding drum may be maintained at a constant value. For this purpose, the speed control mechanism 98-l88 (Figs. 5 and 6) of the stepless change speed transmission 58 is connected with the loaded swingable support 18 of the pressure roll 84 by a linkage |82--l88 including an adjustable turn buckle H8. 7 As described above. the pressure roll 84 acts as a feeler contacting the winding on the beam, so that the swingable support 18 is swung about its pivot 12 in dependence on the increase in the diameter of the winding, whereby the ratio between the number of rotations of the incoming and outgoing-power shafts of the stepless change speed transmission 58 is changed during the warping operation in such a manner, that the feeding drum 48 is rotated at a substantially constant circumferential speed, although the speed of the incoming-power shaft is gradually reduced. The turn buckle H8 may be used fora manual adiustment of the ratio between the number of rotations of the incoming and outgoing-power shafts at the beginning of a warping operation,

so as to obtain a circumferential speed of the feeding drum 48 of a predetermined value in accordance with the surface charactertisics of the yams.

Furthermore, Fig. 5 illustrates controlling means for an automatic stoppage of the warping plant, when the tension in a yarn exceeds a predetermined extreme high or low value. For this, purpose, shut off switches H2 and H4 arranged in the electric circuit for a stoppage of the warping plant are associated with the controlling rods 28. The switches H2 and 4 are normally closed. If, however, the tension in a yarn l8 exceeds a predetermined extreme high value, the controlling rod 28 is swung about its pivot 38 to such an extent, that its left hand arm, as viewed in Fig. 5, hits theshut off switch H2 for opening same, whereby the electric circuit is interrupted and the warping plant is arrested. Likewise, the warping plant is arrested, when, owing to an undue low tension in the yarn. the right hand arm of the controlling rod 28 hits the shut off'switch ,I 14 for opening same.

According to the embodiment illustrated by Fig. 7, the feeding drum 48 of the controlling device is driven by a separate motor H8 through a belt H8. Thus, the drive of the feeding drum 48 is entirely independent of the drive of the beam 28 by the motor 22 of the warper. The circumferential speed of the feeding drum may be adjusted by a rheostat I28 electrically connected with the motor I I8.

,Fig. 8 illustrates the arrangement of a controlling device 2 in combination with a beamer 2l2. Hereinafter, only those parts of the beamer are described, which are necessary for an understanding of the present invention. The motor 222 of the beamer rotates a shaft 223 by means of a belt drive 225. A gear 221 keyed to the shaft 223 i in engagement with a gear 229 connected with the beam 228 for rotating same. Furthermore, a sprocket wheel 23! keyed .to the shaft 223-is connected by a chain 288 with a sprocket wheel 233 keyed to the incoming-power shaft 288 of the stepless change speed transmission 258 of the controlling device, so that the speed of said incoming-power shaft depends on the speed of the motor 222, which is gradually reduced during the beaming operation by the rheostat 288 controlled by the swingable support 218 of the pressure roll 284 in dependence on the increase in the diameter of the winding on the beam. There are no automatic means for a variation in the ratio between the number of rotations of the incoming-power shaft 288 and the outgoing-powershaft 254 of the transmission 258, so that the circumferential speed of the feeding drum 248 coupled with the outgoing-power shaft by a chain 258 is gradually reduced during the beaming operation. Thus, a difference between the circumferential speed of the feeding drum 248 and the substantially constant travelling speed of the yarns 2l8 occurs during the beaming operation, however, this difference is slight, as the increase in the diameter of the winding on the beam in a beamer is comparatively small with respect to the diameter of the winding on the beam at the beginning of the beaming operation. The manual speed control or hand wheel 282 of the stepless change speed transmission serves for an adjustment of the circumferential speed of the feeding drum at the beginning of a beaming operation in accordance with the surface characteristics of the yarns 218 to be wound upon the beam. The swingable controlling rods 228 and the feeding drum 248 act in the same manner as the controlling rods 28 and feeding drum 48 f the controlling device shown in Figs. 1-3.

I have described preferred embodiments of my.

invention, but it; is' clear that numerous changes and omissions may be made without departing from the spirit of my invention. For example, the controlling devices may be used in combination with a war-per or beamer of any other construction. Furthermore, the controlling device may also be used for the control of the tension in nonelastic yarns or yarns of low elasticity. Moreover, different types of tensioning means may be used for subjecting the yarns to a predetermined tension. Or, the electrical control for arresting the plant as shown in Fig. 5 may be applied to the controlling devices shown in Figs. 1, 2, 4, 7 and 8. Furthermore, different types of feeding means and/or controlling means respond-' ing to a variation in the tension of the yarns may be used, if desired. Moreover, the stepless change speed transmission may be replaced by any other change speed transmission, if the feeding drum ofthe controlling device is driven by a drive operating at a constant speed and the change speed transmission is used only for a preadjustment of the circumferential speed of the feeding drum in accordancewith the surface characteristics of the yarns.

What I claim is:

l. A warping or beaming plant for the winding of yarns upon a beam comprising: a warping or beaming machine; said machine including a driving mechanism for rotating a beam inserted into the machine; a controlling device for controlling the tension in the yarns being wound upon the beam; said controlling device including a rotatable feeding drum arranged for feeding the yarns to the beam upon contact between the yarns and the feeding drum, and controlling means for the control of the contact between the yarns and the feeding drum in response to a variation in the tension of the yarns so as to control the feeding of the yarns by said feeding drum for maintaining a substantially constant tension in the yarns during the warping thereof; and a transmission for coupling said driving mechanism with said feeding drum so as to rotate the latter at a circumferential speed higher than the travelling speed of the yarns.

2. A warping or beaming plant for the winding of yarns upon a beam comprising: a warping or beaming machine; said machine including a driving mechanism for rotating a beam inserted into the machine; a controlling device for controlling the tension in the yarns being wound upon the beam; said controlling device including a rotatable feeding drum arranged for feeding the yarns to the beam upon contact between the yarns and the feeding drum, and controlling means for the control of the contact between the yarns and the feeding drum in response to a variation in the tension of the yarns so as to control the feeding of the yarns by said feeding drum for maintaining a substantially constant tension in the yarns during the warping thereof; a transmission for coupling said driving mechanism with said feeding drum so as to rotate the latter at a circumferential speed higher than the travelling speed of the yarns; and adjusting means associated with said transmission for adjusting a predetermined circumferential speed of said feeding drum.

3. A warping or beaming plant for the winding of yarns upon a beam comprising: a warping or beaming machine; said machine including a driving mechanism for rotating a beam inserted into the machine; automatic speed reducing means for reducing the speed of said driving mechanism in accordance with the increase in the diameter .of the winding on the beam so as to maintain a substantially constant travelling speed of the yarns during the'operation .of the machine, and a rotatable shaft driven by said driving mechanism at a substantially constant number of rotations during the operation of the machine; a controlling device for controlling the tension in the yarns being wound upon the beam; said controlling device including a rotatable feeding drum arranged for feeding the yarns to the beam upon contact between the yarns and the feeding drum, and controlling means for the control of the contact between the yarns and the feeding drum in response to a variation in the tension of the yarns so as to control the feeding of the yarns by said feeding drumfor maintaining a substantially constant tension in the yarns during the warping thereof; and a transmission for coupling said rotatable shaft with said feeding drum so as to rotate the latter at a substantially constant circumferential speed higher than the travelling speed of the yarns.

4. A warping or beaming plant for the winding of yarns upon a beam comprising: a. warping or beaming machine; said machine including a driving mechanism for rotating a beam inserted into the machine, automatic speed reducing means for reducing the speed of said driving mechanism in accordance with the increase in the diameter of the winding on the beam so as to maintain a substantially constant travelling speed of the yarns during the operation of the machine, a rotatable pressure roll, and a loaded swingable support carrying said pressure roll for urging same against the winding on the beam whereby the pressure roll is driven at a substantially constant number of rotations during the operation of the machine; a controlling device for controlling the tension in the yarns being wound upon the beam; said controlling device including a rotatable feeding drum arranged for feeding the yarns to the beam upon contact between the yarns and the feeding drum, and controlling means for the control of the contact between the yarns and the feeding drum in response to a variation in the tension of the yarns so as to control the feeding of the yarns by said feeding drum for maintaining a substantially constant tension in the yarns during the warping thereof; a transmission for coupling said rotatable pressure roll with said feeding drum so as to rotate the latter at a substantially constant circumferential speed higher than the travelling speed of the yarns; and adjusting means associated with said transmission for adjusting a pregetermined circumferential speed of said feeding rum.

5. A warping or beaming plant for the winding of yarns upon a beam comprising: a warpng or beaming machine, said machine includng a driving mechanism for rotating a beam inserted into the machine, a rotatable pressure roll, a loaded swingable support carrying said pressure roll for urging same against the windmg on the beam whereby the pressure roll is driven at a substantially constant number of rotations during the operation of the machine,

and automatic speed reducing means controlled by said swingable support in accordan c the increase in the e wlth diameter of the winding on the beam for reducing the speed of said driving mechanism so as to maintain a substantially constant travelling speed of the yarns during the operation of the machine; a controlling device for controlling the tension in the yarns being wound upon the beam; said controlling device including a rotatable feeding drum arranged for feeding the yarns to the beam upon contact between the yarns and the feeding drum, and controlling means for the control of the contact between the yarns and the feeding drum in response to a variation in the tension of the yarns so as to control the feeding of the yarns by said feeding drum for maintaining a substantially constant tension in the yarns during the warping thereof; a variable speed transmission including a rotatable incoming-power shaft and a rotatable outgoing-power shaft; a first transmission coupling said rotatable pressure roll with said incoming-power shaft; a second transmission coupling said outgoing-power shaft with said feeding drum; and adjusting means associated with said variable speed transmission for adjusting the ratio number of rotations between said two shafts so, as to adjust a predetermined circumferential'speed of said feeding drum.

6. A warping or beaming plant for the winding of yarns upon a beam comprising: a warping or beaming machine, said machine including a driving mechanism for rotating a beam inserted into the machine, and automatic speed reducing means for reducing the speed of said driving mechanism in accordance with the increase in the diameter of the winding n the beam so as to maintain a substantially constant travelling speed of the yarns during the operation of the machine; a controlling device for controlling the tension in the yarns being wound upon the beam; said controlling device including a rotatable feeding drum arranged for feeding the yarns to the beam upon contact between the yarns and the feeding drum, and controlling means for the control of the contact between the yarns and the feeding drum in response to a variation in the tension of the yarns so as to control the feeding of the yarns by said feeding drum for maintaining a substantially constant tension in the yarns during the warping thereof; a stepless change speed transmission including a rotatable incoming-power shaft; a rotatable outgoing-power shaft, and speed control means for varying the ratio of number of rotations between said two shafts; a first transmission coupling said driving mechanism with said incomingpower shaft; a second transmission coupling said outgoing-power shaft with said feeding drum; and movable feeling means arranged for contacting the winding on the beam; said speed control means of the stepless change speed transmission being controlled by said feeling means in accordance with the increase in the diameter of the winding on the beam so as to maintain a substantially constant circumferential speedof the feeding drum.

7. A warping or beaming plant for the winding of yarns upon a beam comprising: a warping or beaming machine, said machine including a driving mechanism for rotating a beam inserted into the machine, automatic speed reducing means for reducing the speed of said driving mechanism in accordance with the increase in the diameter of the winding on the beam so as to maintain a substantially constant travelling speed of the yarns during the operation of the machine, a rotatable pressure roll, and a loaded urging same against the winding on the beam; a controlling device for controlling the tension in the yarns being wound upon the beam; said controlling device including a rotatable feeding drum arranged for feeding the yarns to the beam upon contact between the yarns and the feeding drum, and controlling means for the control of the contact between the yarns and the feeding drum in response to a variation in the tension of the yarns so as to control the feeding of the yarns by said feeding drum for maintaining a substantially constant tension in the yarns during the warping thereof; a stepless change speed transmission including a rotatable incoming-power shaft; a rotatable outgoing-power shaft, and speed control means for varying the ratio of number of rotations between said two shafts; a first transmission coupling said driving mechanism with said incoming-power shaft; a second transmission coupling said outgoing-power shaft with said feeding drum; said speed control means of the stepless change speed transmission being controlled by said swingable support of the pressure roll in accordance with the increase in the diameter of the winding on the beam so as to maintain a substantially constant circumferential speed of the feeding drum; and adjusting means associated with the coupling means for the feeding drum for adjusting a predetermined circumferential speed of said feeding drum.

8. A warping or beaming plant for the winding of yarns upon a beam comprising: a warping or beaming machine including an electromotor for rotating a beam inserted into the machine; and a controlling device for controlling the tension in the yarns being wound upon the beam; said controlling device including feeding means arranged for feeding the yarns to the beam, controlling means for the control of the feeding of the yarns by said feeding means in response to a variation in the tension of the yarns so as to maintain a substantially constant tension in the yarns during the warping thereof, and shut off switches arranged in circuit with said electromotor and controlled by said controlling means for shutting off the electromotor when the tension in the yarns reaches a predetermined high or low degree.

9. A device for controlling the tension in the yarns of a warp being wound upon a beam in a warping or beaming plant comprising: a rotatable cylindrical feeding drum for feeding yarns of the warp to the beam upon contact between such yarns and the feeding drum, and controlling means in engagement with the yarns of the warp, said controlling means being responsive to variations in the tension of yarns of the warp and being arranged for displacing such yarns upon a variation in the tension thereof in planes substantially perpendicular to the longitudinal axis of the feeding drum and changing thereby the length of the arc of contact between such yarns and the cylindrical surface of the feeding drum so as to control the feeding of said yarns by said feeding drum for maintaining a substantially constant tension in the yarns of the warp during the warping thereof.

10. A device for controlling the tension in the yarns of a warp being wound upon a beam in a warping or beaming plant comprising: a rotatable cylindrical feeding drum for feeding yarns of the warp to the beam upon contact between such yarns and the feeding drum, adjusting meansassociated with said feeding drum for an swingable support carrying said pressure roll for adjustment of the circumferential speed thereof, and controlling means in engagement with the yarns of the warp. said controlling means being responsive to variations in the tension of yarns of the warp and being arranged for displacing such yarns upon a variation in the tension thereof in planes substantially perpendicular to the longitudinal axis of the feedin drum and changing thereby the length of the arc of contact between such yarns and the cylindrical surface of the feeding drum so as to control the feeding of said yarns by said feeding drum for maintaining a substantially constant tension in the yarns of the warp during the warping thereof.

11. A device for controlling the tension in the yarns of a warp being wound upon a beam in a warping or beaming plant comprising: a rotatable cylindrical feeding drum for feeding yarns of the warp to the beam upon contact between such yarns and the feeding drum, and tensioning' means in engagement with the yarns of the warp for subjecting same to a predetermined force, said tensioning means being responsive to variations in the tension of yarns of the warp and being arranged for displacing such yarns upon a variation in the tension thereof in planes substantially perpendicular to the longitudinal axis of the feeding drum and changing thereby the length of the arc of contact between such yarns and the cylindrical surface of the. feeding drum so as to control the feeding of said yarns by said feeding drum for maintaining a substantially constant tension in the yarns of the warp during the warping thereof.

12. A device for controlling the tension in the yarns of a warp being wound upon a beam in a warping or beaming plant comprising: a rotatable cylindrical feeding drum for feeding yarns of the warp to the beam upon contact between such yarns and the feeding drum, and adjustable tensioning means in engagement with the yarns of the warp for subjecting same to a predetermined force, said adjustable tensioning means being responsive to variations in the tension of yarns of the warp and being arranged for displacing such yarns upon a variation in the tension thereof in planes substantially perpendicular to the longitudinal axis of the feeding drum and changing thereby the length of the arc of contact between such yarns and the cylindrical surface of the feeding drum so as to control the feeding of said yarns by said feeding drum for maintaining a substantially constant tension in the yarns of the warp during the warping thereof.

13. A device for controlling the tension in the yarns of a warp being wound upon a beam in a warping or beaming plant comprising: a rotatable cylindrical feeding drum for feeding yarns of the warp to the beam upon contact between such yarns and the feeding drum, and a series of controlling means, said controlling means being independent of each other, each controlling means being in engagement with a yarn of the warp, and each controlling means being responsive to variations in the tension of the yarn engaged by the controlling means and being arranged for displacing such a yarn upon a variation in the tension thereof in a plane substantially perpendicular to the longitudinal axis of the feeding drum and changing thereby the length of the arc of contact between such a yarn and the cylindrical surface of the feeding drum so as to control the feeding of said yams-by said feeding drum for maintaining asubstantially constant tension in the yarns of the warp during the warping thereof.

14. A device for controlling the tension in the yarns of a warp being wound upon a beam in a warping or beaming plant comprising: a rotatable cylindrical feeding drum for feeding yarns of the warp to the beam upon contact between such yarns and the feeding drum, and a series of swingable controlling rods being independent of each other, each double-armed controlling rod having an element on each of its arms for engagement with a yarn of the warp, one arm of each of said swingable double-armed controlling rods being under a load for subjecting the yarn engaged by the rod to a predetermined force, and

each swingable double-armed controlling rod 136- 7 ing arranged for swinging aboutits pivot in. response to a variation in the tension of the yarn engaged by the rod and for displacing such a yarn in a plane substantially perpendicular to the longitudinal axis of the feeding drum and changing thereby the length of the arc of contact between such a yarn and the cylindrical surface of the feeding drum so as to control the feeding of said yarns by said feeding drum for maintaining a substantially-constant tension in the yarns of the warp during the warping thereof.

15. In a device as claimed in claim 14, one arm of each of said swingable double-armed controlling rods being under the load of a weight adjustably mounted on said arm, and means for holding said weight in its adjusted position.

HANS HARTUNG.

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