US1822391A - Yarn-winding machine - Google Patents

Description

1 Sept. 8, 1931 J. COLEY 1,822,331

YARN WINDING MACHINE Filed June 29, 1929 2 Sheets-Sheet 1 YARN WINDING MACHINE Filed June 29, 1929 2 Sheets-Sheet 2 mum.

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Patented Sept. 8, 1931 hairs STATES PATENT-OFFICE JAMES GOLEY, or LEICESTER, ENGLAND, ASSIGNOR To WILDT ANnooi/irANYLIMITEn,

or LEICESTER, ENGLAND, nnrrrsn: COMPANY YARN-WINDING MACHINE Application filed June 29, 1929, Serial No. 374,758, and in Great Britain March 28, 1929.

This invention consists in improvements.

a rotatable riser-wheel so carried that as the wound yarn-package attains a predetermined diameter, the wheel will, at the lower end of its traverse, engage the wound yarn,.

and mechanical means for rotating the riserwheel comprising a ratchet-wheel rotatable together with the risenwheel and a pawl mounted in an oscillating frame so that its nose can engage the teeth of the ratchetwheel. The riser-wheel is preferably mounted on, and is in screw-threaded engagement with, a screw-threaded rod carried on the usual rising and falling bar; or,;alter1-iatively, it may be otherwise operatively engaged with the rod so that as it rotates it will travel lengthwise of the rod.

It will be understood that in this type of riser mechanism it is intended that the drive for the ratchet wheel shall be such that the rate at which 1t will advance the riser-wheel lengthwise of the yarn-package will not-of itself be suflicient to accommodate the rate at which the diameter of the yarn-package will increase, and in consequence reliance is placed upon the engagement of the edge of the riser-wheel withthe surface of the yarn-- package to rotate and advance the riserwheel the amount required to make up for the deficiency in the advance imparted to it by the ratchet mechanism alone. The engagement of the riser-wheel with the yarnpackage will only occur at one end 'ofthe reciprocating. stroke of the rlser-wheel, it being understood that the latter is continuously reciprocated relatively to the yarn? the like, the operation of the riser mechanism has to be not only very certain inaction but also light or delicate in its movement. An object of the invention is to improve riser lnechanism of this type so that inertia and frictional resistance to movement of the riser-wheel on its spindle are brought with in practical limits toenable a-yarn-package to be produced having, when completed, an exterior surface that is smooth and uniform in appearance. I I

According to the present invention, riser mechanism of the above type has as one feature the combination of a rotatable riserwheel, a ring of ratchet-teeth rotatable with the riser-wheel and an oscillatory pawl for engaging the teeth of the ratchet-wheel,- said pawl being pivoted intermediate its twoends and sufficiently to one side of its center of gravity that it will be biased so that its nose isheldin engagement with the ratchet teeth by gravity alone. Preferably, the tail end of the pawl on one side of the pivot therefor will be biased to hold the nose in engage. ment with the ratchet-teeth. Thebias can be, and conveniently is, made so light that a backstop pawl is unnecessary.

In one form of the invention,- there is provided a let-off device comprising an arm that is mounted independently of the pawl, is normally held by the running yarn away fromthe pawl, but is so positioned that when released by the breakage or givingrout of the yarn, it will n'rove'i'nto' engagement with the tail end of the pawl and rock the latter on its pivot to disengage the nose from the ratchet-teeth. In one form, the let-off device is constituted by an arm pivotally mounted intermediate its two ends so that it is gravitationally biassed' to swing one end into engagement with the pawl, and atthe other end the let-off arm constitutes a yarngui'de against which the yarn will drag with sufficient pressure to hold it against its gravitational bias. l

The foregoing and other features of the inventionv will be more clearly understood, fromthe following description of one *pre ferred form ofthe invention described in conjunction with the accompanying drawings, in which Figure 1 is a plan View of the riser mechanism, looking down from above;

Figure 2 is a partial elevation of the riser mechanism shown in Figure 1, and

Figure 3 is an elevation looking from the left of Figure 2.

Like reference numerals indicate like parts in the several figures of the drawings.

The usual rising and falling bar is shown at 10 and extends in known manner along the front of the machine carrying any desired number of riser mechanisms similar to that now to be described. The riser mechanism is carried on a bracket 11 bolted to the rising and falling part 10, and consists essentially of a screw-threaded riser-rod 12, a riser-wheel 13 rotatable on the rod 12 and in screw-threaded engagement therewith, and a guide-rod 14 parallel with the rod 12. The rod 14 is secured at its lower end to the bracket 11 and is steadied at its upper end by means of a link 15 connecting it with the upper end of the rod 12.

The means by which the wheel 13 is engaged with the threads of the rod 12 comprises a strip 16 which is mounted on an upstanding boss 17 constituting a part of the wheel 13 by means of screws 18 which pass through slots in the strip 16. A ball 19 is normally pressed by a spring 20 against the underside of the strip 16. The latter is slotted where the shanks of the screws 18 pass through it so that it may have limited movement in the direction of a diameter of the wheel 13, and one edge of the aperture in the strip 16 which encircles the rod 12 is intended to engage the screwthread of the rod. The ball 19, when the edge of the strip 16 is thus in engagement with the threads of the rod, presses into an indentation in the strip and so holds it in position. To disenga e the edge of the strip from the screwthrea the strip can be pressed to the right in Figure 2.

The strip or plate 16 is formed with an aperture through which the screwthreaded rod 12 passes and the aperture is slightly larger in diameter than the rod. The plate in its operative position in which it is retained by the ball 19 will be such that the aperture is eccentric with respect to the axis of the rod 12 and one edge (the right-hand edge in Figure 1) of the aperture in the strip or plate 16 will enter the screwthreads but this edge will not be pressed, as in hitherto known constructions, into engagement with the bottoms of the grooves of the screwthread, or at least not with any material degree of frictional engagement therewith. It will, however, engage with the sides of the screwthread to constitute the equivalent of a nut portion for the riser wheel 13. Ob viously, if the strip or plate 16 is pushed to the right to bring its aperture into a position of concentricity with the axis of the rod 12 the engagement with the screwthread of the rod will be released and the riser wheel can then as a whole be slid lengthwise along the rod 12.

Projecting downwardly from the wheel 13 is a tubular sleeve 21 which passes over the rod 12, and secured to rock on this sleeve is a boss 22 held in place between an upper collar 23 and a lower collar 24 that is held in place on the sleeve 21 by means of set-screws 25.

From the collar 23 there is an arm 26 that, at its outer end, embraces and slides on the rod 14. The boss 22 has also a radially-projecting arm 27, the outer end of which embraces and can slide on a rod 28 to be described more fully hereinafter. On a lateral projection from the boss 22 there is mounted, by means of a screw 29, a rocking pawl 30, the nose of which is intended to engage a ratchetwheel 31 which, in the present case, is cast integral with and on the underside of the wheel 13. This is the gravity-actuated pawl hereinbefore mentioned, the tail of which is normally sufficiently biassed so that the nose is held by gravity in engagement with the teeth of the wheel 31. On the arm 27 is mounted, by means of a screw 32, a pivoted lever constituted by a central block and wires 34 and 35 extending outwardly from both sides of the block. The end of the wire 35 is turned so as to lie underneath the tail of the pawl 30, whereas the wire 34 is also bent round at its outer end and at 36 constitutes a guide under which the yarn is led from the hank or spool from which it is to be wound, and thence through a yarn-guiding eye 37, which itself is carried at the end of another wire projecting from the arm 27. From the eye 37 the yarn passes to the spool 38 on which the yarn is being wound.

From a fixed front rail 39 of the machine there projects beneath the riser mechanism a rod 40 that is rotatable about its longitudinal axis and carries an upwardly-projecting rod 41, the angle of which, in relation to the axis of the rod 12, can be adjusted by rotation of the rod 40 about its axis. A pointer 42, rotating with the rod 40, can be set in conjunction with the scale 43 carried on the fixed rail 39.

Engaging the rod 41 is an eye situated at the end of a radial arm 44, which is also mounted to rock on the screwthreaded rod 12 below the bracket 11. The arm 44 is held in place by means of a collar 45 clamped to the rod 12 by means of set-screws such as 46. The rod 28 is mounted on the arm 44, and in order that, as the mechanism is moved up and down by the rising and falling rail 10, the eye at the end of the arm 44 inay'travel up and down the inclined rod 41, the eye is provided at the end of a short slider 47 carried in bearings 48 on the arm 44. 1

In operation, the action of the apparatus is as follows :The yarn is led to the spool 38' under the yarn-guide 36 so that the end 35 of the pivoted yarn-guide is held free of the tail end of the pawl 30. The nose of the pawl is, therefore, held by gravity in engagement with the ratchetteeth 31, as shown in Figure2. As the rising and fall ing rail 10 carries the parts up and down, the rod 28 will be moved backwards and forwards angularly about the aXis of the rod 12, and, in so doing, will rock the boss 22 and with it the pawl. The amount of angular rotation thus imparted to the wheel 13 will depend upon the angle at which the bar 41 is set in relation to the axis of the rod 12, and this will generally be such that the mechanical feed imparted to the wheel 13 is insufficient by itself to rotate the wheel sufliciently to feed it along the rod 12 at the required rate. When the wound yarnpackage attains the requisite diameter, the wheel 13, in known manner, will frictionally engage with the yarn and will be given an added rotation by this engagement, and, in

i so doing, the ratchet-teeth 31 will ride over i of the pawl with the ratchet-teeth, is so slight as to be almost negligible.

It is also so light that no back-stop pawl is required, and, consequently, the friction of the pawl against the ratchet'wheel isvery much less than would be that of the two pawls, for example, of the apparatus described in the specification of British Letters Patent No. 227,013.

If the yarn fails or breaks,'the guide 36 y will no longer be supported by theyarn and as the natural bias of the rocking arm 35,

32, 34, 36 is such as to allow the end 36- to bring the end 35 into engagement with the pawl for the purpose just described.

The wheel 13 and its boss 17 may be made of aluminium or other light metal so that the inertia of the wheel is as small as possible.

The riser mechanism according to this invention is found to work with great accuracy with the very lightest of silk or artificial I silk yarns, and will work with equal or even greater accuracy with heavier classes of yarn. l

I'claim:- M r l. Riser-mechanism of the kind described comprising in combination a rotatable riserwheel, a ring of ratchet-teeth rotatable with the risenwheel, an oscillatory pawl for engaging the teeth of the ratchet-wheel and normally held by gravity alone in engage- IIIBHlSWitl] the ratchet-teeth, andv a letoff device comprising an arm that is pivotally mounted independently of the pawl, is normally held by the running yarn away from the pawl and is so positioned that, when released by' breakage or failure of the yarn, it will move into engagement with the pawl and will rock the latter on its pivot to disengage the pawl from the ratchet-teeth.

2. Riser-mechanism of the kind described comprising in combination a rotatable riser wheel, a ringof ratchet-teeth,rotatable with the riser-whee1, an oscillatory pawl for engaging the teeth of the ratchet-wheel, said pawl being pivoted intermediate its two ends and sufficient to one side of its centre of gravity that its tail end will be biassed to hold the nose in engagement with the ratchet-teeth by gravity alone, and a let ofi device comprising an arm that is mounted independently of the pawl, is normally held by the running yarn away from the pawl, and is so positioned that, when released by breakage or failure of the yarn, it will move into engagement with the tail end of the pawl and rock the latter on its pivot to dis,- engage the nose of the pawl from the ratchetteeth.

- 3. Riser-mechanism of the kind described comprising in combination a riser-wheel, a ring of ratchet-teeth rotatable with the riserwheel, an oscillatory pawl for engaging the teeth of the ratchet-wheel and normally held by gravity alone in engagement with the ratchet-teeth, and a let-ofi device comprising an arm which is pivotally mounted in termediate its two ends independently of the pawl, which at one end constitutes a yarn-guide against which the runnlng yarn will bear with sufiicient pressure to hold it away from the pawl, and which is gravitationally biassed so that on breakage or fail ure'of the yarn, it will swing the other end into engagement with the pawl to disengage it from the teeth of the ratchet-wheel.

4. Riseranechanisnr of the kind described comprising in combination a rotatable riserwheel, a ring of ratchet-teeth rotatable with the riser-wheel, an oscillatory pawl which is pivoted intermediate its two ends sulficiently to one side of its centre of gravity so that its tail end will be biassed by gravity alone to hold the nose against the ratchetteeth, and a let-off device comprising an arm which is mounted independently; of the Jill int

t a pawl, whlch at one end constitutes a yarnguide against which the running yarn will bear with sufiicient pressure to hold it against its bias away from the ratchet-teeth, and which, when released by breakage or failure of the yarn, will swing by gravity to bring its other end into engagement with the tail of the pawl so as to disengage the latter from the ratchet-teeth.

5. Riser-mechanism of the kind described comprising in combination a rotatable riserwheel, a screw-threaded rod on which the riser-wheel is mounted, an aperture in the riser-wheel through which the rod passes and which is large enough to slide freely on the rod, and an endwise-movable strip mounted on the riser-wheel and formed with an aperture through which the rod passes and which is larger in diameter than that of the rod, means to hold the plate on to the riser-wheel. but to permit endwise movement of the plate to enable an edge of the aperture in it to be engaged with the screw-thread of the rod, and holding means normally to retain the plate in the position in which it is engaged with the screwthread.

L 6. Riser-mechanism of the kind described comprising in combination a screw-threaded rod, a riser-wheel mounted thereon, a ring of ratchet-teeth formed integrally with the under surface of the riser-wheel, a pawl arranged to oscillate about the axis of the riser-wheel and pivoted intermediate its two ends sufiicient to one side of its centre of gravity so that its tail end will be biassed to hold its nose against the ratchet-teeth, the gravitational bias of the pawl being so light that a back-stop pawl is unnecessary, an endwise-movable strip mounted on the riserwheel and having an aperture through which the rod passes and of larger diameter than that of the rod, means to hold the strip on to the riser-wheel but to permit of endwise movement of the strip to enable an edge of the aperture therein to be engaged with the screw-thread of the rod, holding means normally to retain the plate in the position in which it is engaged with the screw-thread, and a let-off device which is mounted independently of the pawl, which is pivotally mounted intermediate its two ends, which is gravitationally biassed to swing one end into engagement with the tail of the pawl, and which, at the other end, coustitutes yarn-guide against which the running yarn will bear with suflicient pressure to hold it against its bias away from the pawl.

bis;

7. Riser mechanism of the kind described comprising in combination a rotatable riserwheel, the edge of which is intended to engage the surface of a yarn-package as it is being wound, a ring of ratchet-teeth formed integrally upon the riser-wheel, and an oscillatory pawl which engages the ratchetteeth and is normally held in engagement therewith by gravity alone.

8. Riser mechanism comprising in combination a rotatable riser-wheel formed to engage with the surface of a yarn-package, a ring of ratchet teeth rotatable with the riser-wheel, an oscillatory pawl for engaging the teeth of the ratchet-wheel, said pawl being pivoted intermediate its two ends and sufficiently to one side of its center of gravity that it will he biassed to hold the nose of the pawl in engagement with the ratchetteeth by gravity alone, and pawl-actuating means to drive the ratchet-wheel at a rate less than that necessary by itself to form the wound yarn package.

9. Riser mechanism comprising in combination a rotatable riser-wheel formed to engage with the surface of a yarn-package, a ring of ratchet-teeth rotatable with the riser-wheel, an oscillatory pawl for engaging the teeth of the ratchet-wheel, said pawl being pivoted intermediate its two ends and sufliciently to one side of its center of gravity that its tail end will be biassed to hold the nose of the pawl in engagement with the ratchet-teeth by gravity alone, and pawlaetuating means to drive the ratchet-wheel at a rate less than that necessary by itself to form the wound yarn-package.

10. Riser mechanism comprising in combination a rotatable riser-wheel formed to engage with the surface of a yarn-package, a ring of ratchet teeth rotatable with the riser-wheel, an oscillatory pawl for engaging the teeth of the ratcl'iet-wheel, said pawl being pivoted intermediate its two ends and sufliciently to one side of its center of gravity that it will be biassed to hold the nose of the pawl in engagement with the ratchetteeth by gravity alone, and pawl-actuating means to drive the ratchet-wheel at a rate less than that necessary by itself to form the wound yarn-package, the gravitational bias of the pawl being so light that a backstop pawl is rendered unnecessary.

In testimony whereof I aiiix my signature.

JAMES COLEY.

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