US2238203A - Textile machinery - Google Patents

Description

A ril 15, 1941.

J. R. WYLIDE EH'AL TEXTILE mcHinERY Filed April 18, 1940 A'H" arm a g Patented Apr. 15, 1941 2,238,203 'rax'rlm momnaar Joseph Rowland Wylde and William Williams, Spondon, near Derby, England, assignors to Celanese Corporation of America, a corporation of Delaware Application April 18, 1940, Serial No. 330,250 In Great Britain June 23, 1939 9 Claims.

This invention relates to textile machinery and more particularly to spindles suitable for use in yarn twisting apparatus.

The invention is particularly applicable to the production of .yarns or threads of high twist, especially crpe threads such as are used in the manufacture of natural or artificial silk crepe fabrics.

An apparatus for the production of such threads is described in U. S. Patent No. 1,784,581. According to that specification, yarns are drawn from a rotating supply package by a take-up package supported on and frlctionally driven-by a drum, the yarn passing through a floating ring, disposed about the package supporting spindle below an annular flange secured to the spindle. and thence through suitablethread guides to the take-up package. The degree of twist imparted to the yarn is governed by the rate of rotation of the supply package and the rate at which the yarn is drawn off by the take-up package, the higher the rate of rotation of the supply package for a given rate of takeup of the yarn, the higher the degree of twist imparted to the yarn.

An object of the present invention is to improve the twist controlling elements of apparatus of the type described above, so as to produce yarns having more uniform twist.

According to the present invention a spindle adapted to support the yarn package to be rotated and protrude through the bore of the package, comprises a flange formed on the protruding end of the spindle, a ring disposed loosely about the spindle between the end of the package and the flange, between which ring and the flange the yarn passes during operation of the spindle, said ring having an inside diameter that is less than the diameter of the flange so as to be capable of being urged towards the flange under the pull of the yarn, and a thread guide disposed substantially centrally near the end face of the flange on the side remote from the ring and capable of rotating independently of the spindle.

arate member provided with means for securing With this construction, the disposition of the rotatable thread guide near to the'end face of the flange causes thethread guide to constrain the yarn to make contact with a' substantial portion of the surface of the flange while at the same time allowing the yarn to move circumferentially round the flange as the package rotates the member to the spindle; for example, the member may be provided with a screwed shank for engagement with a tapped hole provided in the end of the spindle, the screwed shank terminating in a shoulder adapted to abut the end of the spindle so as to form an annular space between the spindle end and the flange for accommodation of-the loosely disposed ring. With the flange formed on a separate member the member is conveniently bored axially throughout its length to form a bearing in which a cylindrical extension of the thread guide is free to rotate, the tip of the extension protruding through the screwed shank and a washer being riveted to the extension to prevent the guide from coming out of the bore. Such unit construction lends itself to the application of the present invention to existing twisting apparatus at very small cost.

The maximum diameter of the flange is preferably sufliciently less than that of the spindle to allow the package to be accommodated to be easily slipped over the flange into position on the spindle.

By way of example a form of spindle according to the invention will now be described in greater detail with reference to the accompanying draw- Figure 1 is a diagrammatic side elevation of a twisting apparatus employing a spindle according to the invention;

Figure 2 is an enlargedview of the tip of the spindle shown. in Fig. 1; and

Figures -3 and 4 are alternative constructions of a thread guide.

Referring to Figs. 1 and 2, a take-up package I supported on and frictionally driven by a drum 2 draws yarn 3 from a rotating bobbin 4 supported on and driven by a spindle 5, the spindle S'being driven by a belt 6 passing over a whorl I on the base of the spindle.

The tip of the spindle'lis drilled axially to form a hole 8 which is tapped for the reception of the screwed shank 9 of a member it having a flange I! of a proximately spheroidal shape and a cylindrical portion l3 terminating in a shoulder l4 abutting the end of the spindle 5. The member II is provided with an axial bore of a pigtail.

. l2 into position on the spindle.

During twisting the yarn 3 follows a balloon shaped path from the rotating bobbin 4 to a ring 2| loosely. disposed about the cylindrical portion I3 of the member H, and then passes between the ring 2| and the flange l2, over the flange I2 to the rotatable guide H, which allows the yarn to travel circumferentially round the flange as it unwinds from the rotating package 4, and thence over a substantially vertical path to a fixed guide eye 22 from which it passes through a traversing guide 23 to the take-up package I.

The pull exerted on the yarn 3 by the rotating take-up package I, coupled with the drag on the yarn arising from the rotation of the bobbin 4, causes the ring 2| to have a partial trapping effect on the yarn at the point where the yarn passes between the ring 2| and the flange l2. The thread guide I'I, being disposed centrally and near to the end of the flange l2,

constrains the yarn to make contact with the surface of the flange |2 'over a line extending from the point where the yarn passes between the' ring 2| and the flange |2 to the end of the flange, and the pull of the take-up package urges the yarn in contact with the flange to press against the flange to provide for smooth insertion of the twist.

The diameter of the spindle at the tip abutting the shoulder I4 is slightly greater than the inside diameter of the ring 2| to allow the ring when not in use to rest on the tip of the spindle where the ring can readily be lifted for the purpose of threading the yarn. I

As mentioned above the guide I! shown in Fig. 2, is made from wire bent into the form Alternative forms of guide are shown in Figs. 3 and 4, these guides having wire stems 24 terminating in flattened pieces 25 pierced to form eyes 26 through which the thread is passed.

Having described our invention what we desire to secure by Letters Patent is:

1. A twisting spindle adapted to support a yarn package to. be rotated and protrude through the bore of the package, comprising a flange formed on the protruding end'of the spindle, a ring disposed loosely about the spindle between dle of a yarn twisting apparatus, comprising a flanged member having a cylindrical body of smaller diameter than the flange, a ring of smaller diameter than the flange loosely fitted around the cylindrical body, a thread guide rotatably mounted on the flanged member with its guide eye disposed substantiallycentrally near the end face of the flange on the side remote from the body, and means on the body for attaching the device to the spindle.

4. A twist controlling device according to claim 3, wherein the flange is of approximately spheroidal shape.

5. A twist controlling device according to claim 3, wherein the thread guide comprises a length of wire twisted to form a pigtail guide eye.

6. A twisting spindle adapted to support a yarn package to be rotated and protrude through the bore of the package, comprising a member separate from the spindle and provided with means for securing it to the end of the spindle, the member being formed with a flange, a ring disposed loosely about the spindle between the end of the package and the flange between which ring and the flange the yarn passes during operation of the spindle, said ring having an inside diameter that is less than the diameter of the flange so as to be capable of being urged towards the flange under the pull of the yarn, and a thread guide carried by the spindle and disposed substantially centrally near the end face of the flange on the side remote from the ring, the guide being capable of rotating independently cf the spindle.

7. A twisting spindle adapted to support a yarn package to be rotated and protrude through the bore of the package, comprising an axially bored flange formed on the protruding end of the spindle, a ring disposed loosely about the spindle between the end of the package and the flange between which which ring and the flange the yarn passes during operation of the spindle, said ring having an inside diameter that is less than the diameter of the flange so as to be capable of being urged towards the flange under the pull of the yarn, and a thread guide having a cylindrical extension freeto rotate in the bore of the flange, the guide being disposed substantially centrally near the end face of the flange on the side remote from the ring.

8. A spindle according to claim 7, wherein the thread guide comprises a length of wire twisted to form a pigtail guide eye.

the end of the package and the flange between a which ring and the flange the yarn passes during operation of the spindle, said ring having an inside diameter that is less than the diameter of th flange so as-to be capable of being dependently of the spindle.

2. A spindle according to claim L'Wherein the flange is of approximately spheroidal shape.

3. A twist controlling device adapted to be attached to the yarn package supporting spin- 9. A twisting spindle adapted to support a yarn package to be rotated and protrude through the bore of the package, comprising a. flange formed on the protruding end of the spindle and having a' diameter less than that of the spindle, a ring disposed loosely about the spindle betweenthe end of the package and the flange between which ring and the flange the yarn passes during operation of the spindle, said ring having an inside diameter that is less than the diameter of the flange so as to be capable of being urged towards the flange under the pull of the yarn, and a thread guide carried by the spindle and disposed substantially centrally near the end face of the flange on the side remote from the ring, the guide being capable of rotating independentlyof the spindle.

JOSEPH ROWLAND WYLDE'. WILLIAM WILLQIAMS.

Images