US1823638A - Machine for spinning, doubling, twisting, and the like, yarns, fibers, and the like - Google Patents

Description

Sept. 15, 1931. 1-. E. ANDREW ET AL 1,323,533 I MACHINE FOR SPINNING, DOUBLING, TWISTING, AND

THE LIKE, YARNS, FIBERS, AND THE LIKE Filed Nov. 18, 1927 v 2 Sheets-Sheet 1 bom 7/70/7745 Edm'n fin re p MQ/Ol? L dr gns'flefh QQALW Sept. 15, 1931. T. E. ANDREW ET AL 1,823,538

MACHINE FOR SPINNING, DOUBLING, TWISTING, AND- THE LIKE, YARNS, FIBERS, AND THE LIKE Y Filed Nov. l8 1927 2 Sheets-Sheet 2 A7e/or7 Zangsfrafh 4/7765 Bancroff @51 7 1 El cia/W213 Patented Sept. 15, 1931 UNITED STATES.

PATENT OFFICE THOMAS EDWIN ANDREW AND MELON LANGSTRETH, OF ROCHDALE, AND JAMES BANCROFT, OF ACCRINGTON, ENGLAND, ASSIGNORS TO DUNLOP COTTON MILLS LIMITED, OF ROCHDALE, ENGLAND MACHINE FOR SPINNING, DOUBLING, TWISTING, AND THE LIKE, YARNS, FIBERS, AND THE LIKE Application filed November 18, 1927, Serial No. 234,284, and in Great Britain April 13, 1 927.

This invention relates to spinning, twisting, doubling and the like machines of the kind hereinafter called double twist ma chines adapted to impart two or more twists to the roving, yarn, thread or the like, hereinafter called the yarn, at every single revolution of the spindle.

In this class of machine the yarn in transit during treatment is formed into a loop held relatively fast at points adjacent the Wind oif spool and the take up spool respectively and the loop is rotated at its closed end so that one leg of the said loop rotates about the other. Thus, two twists are imparted to the yarn, one between each respective relatively fast point and the rotary point.

Hereinafter we have used the terms bobbin and reel and in order that the significance thereof may be appreciated, the use of the said terms is explained in the following paragraph.

In ring and travellerand also in flier machines, the twisted yarn is invariably wound onto the spool associated with those devices. Now in this respect there are two main classes of double twist machines. The same being (as) those wherein the twisted yarn is wound onto the spool associated with the twisting devicesthe same sequence as.

in ring and traveller machines, and (1;) those wherein the said sequence is reversed,

the twisting devices being associated with the spool of the untwisted yarn. This invention has particular reference to the latter class and hereinafter, in general, the term bobbin is used in connection with the spool carrying the untwisted yarn, and the term reel with the spool whereon the twisted.

yarn is wound.

There are several types of this latter class of double twist machines: our invention refers mainly .to improvements in that type of such machines wherein firstly; the yarn is led from the bobbin, through a rotary part relative to which it is stationarily mounted, out at the side thereof and thence to the reel, and wherein, secondly, rotation of the bobbin is occasioned by unwinding. Of the points referred to in the second paragraph hereof the rotary point occurs where the yarn leaves the spindle While the two relatively fast points occur, one between the said rotary point and the bobbin and the other between the said rotary point and the reel.

It will be apparent that to ensure a constant degree of twist an even tension in theyarn at all points is essential and it is an object of this invention to provide means whereby the tension in the yarn is occasioned to the required degree and caused to be constant irrespective of extraneous conditions militating against such evenness of tension; such for instance as the tendency for the bobbin to rotate faster by its momentum than it would by the normal pull of-the arm-thus to decrease the tension in the sai yarn.

\Vhile the opposing friction at the bearings of the bush or spool-hereinafter called the spool-of' the bobbin occasioned by the weight of the yarn thereon-tends to retard the rotation of the said bobbinthereby tensioning the yarnwe have foundthat such friction, particularly at normal i. e., plain concentric bearings is insuflicient to provide the degree of tension required.

According to this invention, therefore, we do not rely wholly upon the friction normal at ordinary bearings but preferably provide means whereby the same may be increased and/0r augmented in the required degree and manner; the said means preferably being actuated by or associated with improved guiding and/or tensioning means which are a particular feature of our said invention. Provision is made whereby the spindle may support the bobbin without transmitting rotation to it; and various other features of our invention will hereinafter become apparent.

In order that our invention may be more clearly understood and readily carried into practical effect, the same will now be described with reference to the accompanying drawings, in which :Figure 1 illustrates more or less dia rammatically the general principle of double twist machines as manifest in apparatusaccording to one embodiment of our invention;

Figure 2 is a side view, partly in crosssection, of one embodiment of our invention;

Figure 3 is a side view of a modificational construction Figure 4 is a part plan v1ew of Figure 3 Figure 5 shows a constructional detail while Figure '6 shows a furtheirkletailed 'modification.

Referring particularly to Figure 1, the

yarn in transit during treatment-ethe-travel direction of the said yarn being indicated by the arrows in the drawings1s formed into a loop, held relatively fast at points a ad acent to the wind off spool a and b to the take up spool b respectively and the loop is rotated at a point 0 upon its closed end 0 so that one leg d' of the said loop rotates about the other leg 6 thereof. Thus, two twists are imparted to the yarn, one between each respective relatively fast point-a and band the rotary point 0. 4

' Inthe embodiment of our invention illustrated in Figure 2, the package or bobbin of yarn 1 to be twisted is carried on a parallel spool 2'whereof the axis is at right angles bearing pins Gwhereby it is supported in complementary slots'7 vertically disposed in the said extremities 4.

The tensioning arrangement 'as' exemplified in Figure 2- includes a pivotal structure 8 fulcrumed at 9 upon the bracket 8, andextending transversel across the bobbin between the arms of t e said structure 8a guide bar 10 and a brake skid 11.

The guide bar 10 serves'several useful purposes. For instance, while acting as a guide for the yarn to the bore of the spindle it constitutes the first relatively fast point and obviates the possibility of the twisting yarn breaking by entangling loose fibers upon the yarn on the bobbin. Further,

particularly'in association with the pivotal bracket, it also functions to tension the yarn:

the said yarn inpassing over the bar causes the brake skid 11 to be pressed'against the surface of the bobbin of yarn and thus we create friction at that point and also increase the friction at the bearings of the spool of the bobbin.

While the'efiect of such an arrangement may be such as to occasion the required tension-advisably provision is'made whereby the said effect may be accentuated.

'As exemplified in the drawings such proyi'sion may, for instance, be embodied'in meanswhereby (a) the retardation of the bobbin is increased to increase the tension in the yarn or alternatively whereby (b) the tension in the yarn is increased to increase the retardation of the bobbin.

To exemplify, the pressure between the brake skid and the bobbin may be increased a) as in Figure 53 by virtue of the spring 12 or as in Figures 3 and l by virtue of the additional tension occasioned in the yarn by its deviation around the several bars 10 wherein that arrangement is characterized.

The deviation of the yarn about'lhe bars 10 creates in the yarn the desired tension and in the construction illustrated in Figures 3 and at is exemplified this advantageous feature of our invention; namely, that the tension in the yarn may be readily varied for the purpose for instance, without altering the spindle speed, of oceasioning dili'erences of characteristics between yarns of the same count or folding or to accommodate yarns of different counts or foldings merely by .varying the number of bars whereabout the "said yarn is caused to pass.

A further advantageous feature of our invention exemplified particularly in Figure 3, lies in this:that facility is provided to maintain the path or disposition of the yarn, as seen in end elevation, substantially constant throughout the period of un\vin(ling the nature of the said angle or disposition of the yarn of course affecting to a certain degree the tension created in the said yarn.

We will now proceed to vdescribe the means wherebyth'e bobbin is mounted stationarily upon the rapidly rotating driving spindle 3.

Referring again to Figure 2, in the preferred arrangement the bracket 5 has a cylindrical extension 13 whereby it is supported upon ball bearings 11, whereof the inner races are fast upon the said extension and whereof theouter races arefast within the spindle.

Themeans provided completely to obviate the possibility of rotation of the bobbin with the spindlecomprises, as shown in Figure 2, a weight 15 perpendicularly dependent from the cylindrical extension 13.

To accommodate the yarn in'transit from the bobbin to the reel, the said extension 13 is bored along its axis as shown at 16 and the driving spind'lehas a hole 17 communicating with the'said bore.

It now remains to describe the path of the yarn. The said yarn passes from the bobbin over the bar or bars 10, through the bore 16 of the cylindrical extension .13 of the bracket 5, out through the hole 17 in the spindle 3, and from thence to the reel.

The yarn between the spindle and the reel catenates around the bobbin of the yarn and, mainly to keep the said catenary clear of the same, we preferably. provide a disc guide 18 over the edge of which the yarn passes in transit between the said siyinille and-reel.

It is not to be construed that we are limited to the precise details described either of the application of our invention or the particular means for carrying it into effect.

To exemplify: In general, the pivotal structure does not essentially comprise a wire or similar framework. As shown in Figures 3 and 4 for instance, the arms 8 may be rather in the form of plate-like members or flat brackets.

Again, as further exemplified in those fig ures, instead of a brake skid rigid between the said arms we may prefer to utilize a roller 11 rotatable therebetween. And it will be apparent that the said skid-rigid or rotarymay have or be provided with any convenient surface or covering.

Or again, as exemplified in Figure 5, instead of the spool having axially extending pins 6 for its bearings, it may rotate upon an axle 19, said axle being stationarily supported in the extremities 4 by the coacting of its spigot20 with the recesses 21 formed in the said extremities.

The mounting means may be arranged in any convenient manner, such for instance as is indicated in our copending application Serial No. 234,233, filed November 18, 1928.

And we may, further, provide facility to balance or partly to balance the overhanging weight of the bobbin and associated parts, for instance as is exemplified in Figure 6 the weight 15 may function also to that end.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is 2-- 1. An apparatus of the type described which comprises a rotating spindle, a nonrotating bobbin carrier mounted on said spindle and having a yarn passage coaxial with said s indle, a bobbin mounted transversely to t c axis of said spindle, tensioning means on said bobbin carrier serving to deflect said yarn between said bobbin and said passage and braking means continuously actuated by said-deflecting means.

2. An" apparatus of the type described which comprises a rotating spmdle, a nonrotating bobbin carrier mounted on said spindle and having a yarn passage coaxial with the axis of said spindle, a bobbin mounted transversely to the axis of said spindle, an arm pivoted at a fixed point on said bobbin carr er and having its free end resting on said bobbin and tensionin means on said arm to deflect yarn outwardy of its direct path passing from said bobbin to said yarn passage.

3. n apparatus of the. t e described, which comprises a. rotating spindle, a nonrotating bobbin carrier havin a yarn passage coaxial with the axis 0 said spindle and a bobbin mounted on said carrier transversely to the axis ofsaid spindle, an arm pivoted on said carrier and havin its free end bearing against said bobbin an tensioning means on said arm to deflect yarn in passing from said bobbin to said yarn passage and to create a reaction pressure of said arm against said bobbin.

4. An apparatus of the type described which comprises a bobbin carrier having a yarn passage, a bobbin mounted with its axis transverse to said yarn passage, means on said carrier to rotatably support said bobbin, an arm pivoted on said carrier at a fixed point eccentrically to the axis of said bobbin and tiltable to frictionally engage said bobbin, and a tensioning rod on said.

arm servin to deflect said yarn outwardly from its direct path from said bobbin to said passage.

In witness whereof, we have hereunto signed our names.

THOMAS EDWIN ANDREW. MELON LANGSTRETH. JAMES BANGROFT.

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