US2243795A - Tension control for yarn slashers - Google Patents

Description

May 27, 1941- E. J. EADDY TENSION CONTROL FOR YARN SLASHERS Filed Aug. 24, 1939- 2 Sheets-Sheet 1 I May 27, 1941. E. J. EADDY I TENSION CONTROL FOR YARN SLASHERS 2 Sheets-Sheet 2 Filed Aug. 24, 1939 A IL V. J1 J IIIII. 1 k 1 d M. i l m z 7 Patented May 27, 1941 UNITED ST PATENT OFFICE 2 Claims.

This invention relates to textile machines and more particularly to an improved tension control for a high speed slasher.

An object of this invention is to provide an automatically operable tension control for a high speed slasher which includes mechanical means for maintaining the desired tension on the material which is being wound upon the beam.

Another object of this invention is to provide a tension control means for a slasher wherein the speed of rotation of the beam is automatically controlled by the tension applied to the material forwardly of the beam.

A further object of this invention is to provide a tensioning means for tensioning the material being wound upon the beam so that the material will be wound on the beam in a uniform manner throughout the winding of the material on the beam thereby permitting the removal of the material from several beams which are disposed in side-by-side relation so that the material withdrawn from one beam will not vary in its tension from the material withdrawn from another beam.

To the above objects and to others which may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts as will be more specifically referred to and as illustrated in the accompanying drawings wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention as claimed. i

In the drawings:

Figure 1 is a fragmentary side elevation of a yarn slashing machine having a tensioning means for the yarn constructed according to an embodiment of this invention,

Figure 2 is a fragmentary top plan of the machine, and

Figure 3 is a fragmentary end elevation of the machine,

Referring to the drawings, the numeral II] designates generally the frame of a slasher and the numeral II designates the textile material or yarn which has passed substantially entirely through the slasher machine and is to be wound upon the beam. A rotatable roll IZis carried by the frame ID at the delivery end thereof and a beam I4 is rotatably carried by outstanding bearings I3 which are carried by an end of the frame I I]. The yarn II is adapted to pass over an inner idle roller I5 carried by bearings I6 and then the yarn II engages beneath the roller I2 and passes over an outer idle roller II. The yarn passes from the idle roller I'I directly to the beam I4. The idler rolls I5, II are of uniform diameter and of less diameter than the roll I2. The rolls l5, I! are disposed on opposite sides of and are extended above the roll I2. The axis of the roll I! is arranged above the axis of the roll I2. As the yarn is being wound upon the beam I4 the gradual increase in diameter of the beam I4 causes increased tension to be applied to the yarn II and in order therefore to provide a means whereby the yarn II will have a uniform tension irrespective of the depth of the material on the beam I4, I have provided a tensioning means generally designated as I8. This tensioning means I8 comprises a pair of upstanding sup.- porting members I9 provided with laterally projecting lower end portions and a flange 2| which is secured by suitable fastening means to the frame III.

Th upright support 'IQ is provided with an elongated slot 22 within which a slidable bearing 23 engages, Thebearings 23 are adapted to r0- tatably support the opposite ends of a yarn tensioning roll 24 which is disposed between the two uprights I9. The frame or tensioning member I9 includes a lower idler roll 25 which is rotatably disposed between one of the laterally projecting portions 20 of the upright I9 and a second roll 26 is disposed opposite from the roll 25, The yarn II is adapted to engage about the roll 25 then passed vertically upwardly where it is trained about the roll 24 and then brought vertically downwardly and engaged with the roll 26. From this point the yarn passes forwardly to the idler roll I5 and the structure hereinbefore described. 7

A pulley 21 is rotatably carried by bearings 28 fixed to each upright I9 and a flexible tensioning member 29 is trained about the pulley 21 and is secured at one end to a slide member 23 and the opposite end of the flexible member 29 has a weight 38 secured thereto. The weight 3i] is adapted to gravitatingly pull downwardly so as to draw the roller 24 upwardly and thereby maintain the desired tension on the yarn I I. As the tension on the yarn II increases due to the increased amount of yarn on the beam I4, the roller 24 will move downwardly relative to the supporting frame I9 and the weight 30 will move upwardly. In order therefore to provide a means whereby the speed of rotation of the beam It may be varied in proportion to the linear movement of the yarn II about the roll I2, I have provided a speed controlling member, generally designated as 3| which is in the form of pairs of opposed conical pulleys which are movable relative to each other so as to vary the speed of rotation of the desired driven element.

In the present instance, the speed controlling member 3i is constructed similar to the speed controlling member embodied in Patent No. 1,035,860, dated August 20, 1912 wherein the position of the speed controlling pulleys or cones are varied by hydraulic means. In this patent a controlling valve is disclosed for controlling the quantity of fluids passing to the pulley operators. In the present instance, a valve stem 32 which may be similar to the valve stem or operator N in the above patent projects outwardly from a casing 33. A link 34 is secured at one end to the stem or controlling member 32 and at the other end is secured to an upwardly projecting link 35 which at its upper end is secured to a slide member 23. If desired a projection 36 in the form of an arm may be fixed to a slide 23 and the upper end of the link 35 is pivotally secured to the extension or arm 36.

The speed controlling member is provided with a driving shaft 37 and a driven shaft 38. The driving shaft 31 is connected to an operating shaft 33 by means of a chain 40. The shaft 31 is provided with a sprocket M and the operating shaft 39 i provided with a sprocket 42. The chain All engages about the two sprockets 4! and 42. The driven shaft 38 is provided with a sprocket 43 and the beam i4 is provided with a shaft 44 on which a sprocket 45 is mounted. A chain 46 engages about the sprocket 43 and 45 so that when the stem or controlling member 32 is rocked by movement of the tensioning roll 24, the ratio of the speed between the operating shaft 33 and the beam shaft 44 will be varied by movement of the cone pulleysdue to the varianoe of the hydraulic or fluid pressure which is regulated by means of the valve stem 32.

In the use and operation of this tensioning means, the beam Hi When initially placed between the bearings i3 will be empty. At this time the speed controlling member 3! will be so adjusted .by reason of the position of the slide members 23 and the yarn tensioning roller 24, that the linear speed of the beam will be similar to or equal to the linear speed of the roller i2. gradually builds up on the beam i4, thetension on the yarn H increases thus drawing the tension roller 2d downwardly and efiecting a turning of the speed controlling member 23 by rocking of the link 34. In this manner as the yarn on the beam l4 gradually builds up, the speed of the yarn is synchronized with the rotation of the beam it which will be regulated in speed so as to maintain a uniform tension on the yarn between any point preceding the roll 25 and the beam [4.

With a device of this kind the speed or rotation of the beam is regulated by mechanical As the yarnmeans, the mechanical means being automatically controlled in accordance with the tension of the yarn passing through the slasher .and being wound upon the beam. This device may be mounted on any slasher, it only being necessary to install the tension controlling device at any point where the yarn would travel through the floating roll as shown with provisions made for the linkage 35 to connect roll 24 to the variable speed controlling lever 32. With a device of this kind, the tension of the yarn on the beam may be regulated to any desired degree, this being accomplished through regulation of the weight 30.

This device has been placed in actual operation and has been found to more accurately regulate the tension of the yarn which is being wound upon the beam than devices heretofore in use which while of a partly automatic construction nevertheless depend in part upon electrical means to vary the speed of rotation of the beam.

What I claim is:

1. In a tension control for a yarn slasher of that type including a warp beam and a speed regulating means for and operating said beam, the combination of a pair of spaced parallel upstanding supporting members formed with alined lengthwise slots and adapted to be anchored to the slasher frame inwardly of the beam, vertically movable slide bearings mounted in said slots, a vertically adjustable tensioning roll bodily carried by said bearings for and over which the Warp travels, counter-balancing means for said roll supported from the upper portion of said members and connected to said bearings, rear and front spaced parallel idler rolls disposed between the lower portions of said members and under which respectively the warp travels to and from the tensioning roll, a rotatable roll under which the warp travels, an inner idler roll over which the warp travels from the front idler roll to said rotatable roll, an outer idler roll over which the warp travels from the rotatable roll to the beam, said rotatable roll and outer and inner idler rolls adapted to be supported by the slasher frame between said members and beam, and means correlated with the tensioning roll, connected to and bodily moving with a slide bearing and adapted to be connected to said speed regulating mean-s to thereby provide for maintaining a uniform tension on the warp between any point preceding the rear idler roll and the warp beam.

2. The invention as set forth by claim 1 having the diameter of the outer and inner idler rolls uniform and less than the diameter of the rotatable roll, said outer and inner idler rolls being disposed on opposite sides of and extended above said rotatable roll and the axis of the outer idler roll being disposed above the axis of the inner idler roll.

ERNEST J. EADDY.

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