US2582696A - Doffing mechanism for ring spinning, doubling, and twisting machines - Google Patents

Description

Jan. 15, 1952 J. J. HAYTHORNTHWAITE 96 DOFFING MECHANISM FOR RING SPINNING, 1

DOUBLING, AND TWISTING MACHINES Filed Nov. 16, 1950 5 Sheets-Sheet l 1952 J. J. HAYTHORNTHWAITE 2,582,696

DOFFING MECHANISM FOR RING SPINNING, DOUBLING, AND TWISTING MACHINES 5 Sheets-Sheet 2 Filed Nov. 16, 1950 15, 1952 .1. .1. HAYTHORNTHWAITE 6 DOFFING MECHANISM FOR RING SPINNING,

. DOUBLING, AND TWISTING MACHINES Filed Nov. 16, 1950 5 Sheets-Sheet '5 1952 J. J. HAYTHORNTHWAITE ,696

' DQFFING MECHANISM FOR RING SPINNING,

DOUBLING, AND TWISTING MACHINES Filed Nov. 16, 1950 5 Sheets-Sheet 4 ii .a?

N- k\\\\\\\ Y Jan. 15, 1952 J. J. HAYTHORNTHWAITE DOFFING MECHANISM FOR RING SPINNING, DOUBLING, AND TWISTING MACHINES s Sheets-Sheet 5 Filed.Nov. 16, 1950 Patented Jan. 15, 1952 DOFFING MECHANISM FOR RING'SPINNING, DOUBLING, AN D EWISTIN G MACHINES- James Jackson Haythornthwaite, Accrington,

England, assignor-to T. M. M. (Research) Limited, Rossendale, England Application. November. 16, 1950,.Serial No. 195,961 In Great Britain November'29, 1949 *7 Claims. I

Theinvention hasfor its-object-to provide in a-ring spinning, doubling or twisting machine, im-m'ovedmeansfor removing or dofling the yarn packages from the spindlesat the completion 'of the spinning operation-Le. when thebuild of a full yarn package is'complete, such means being applicable whether the relative reciprocatory motion between the spindles and'the rings necessaryior the 'formation of the yarn packages is efiectedby'raising and lowering the spindle rail in.relation to a stationary ring rail, or by reciprocatingmovement of the ringrail in relation to a stationary spindle-rail, or by a combined movement of both these elements. in opposite directions.

In a ringspinning, doubling or twisting unit according to the invention, Iprovide mechanism for dofling the yarnpackage, comprising a carrier member detachably mounted on the spindle to "form a supportior the yarn package Wound thereon, said carrier member being capable of axialv and rotaryv movement relatively to the spindle meansior arresting rotation of the carrier member when the packagereaches the dofling position, acatch ,onthe carriermember for engaging theyarnso that, the carrier member being arrested and the spindles brieflyrotatedthe yarn is drawn taut at the .baseof the package, means iorsseveringthe yarnwhensotautened, and interceptormeans for retaining the carrier memberat the subsequent separation of the spindle andthe ring so that the yarn package issupported with freedom for doffingby lateral displacement.

The yarn-engaging catch and theyarn-severing means mayboth be mounted on'the carriermemher in, suchv relationship that when the yarn is caught by the formerit-is drawn taut. acrossa cutting edge ofthelatter.

The carrier member preferably provides a shrouded seating. for the base of the bobbin,.pirn orlike tubeonvvhichtheyarn package is wound onthespindle, said seating being of such. characterthat when. the spindle. is withdrawn from .the package thelatter will be predisposed to topple laterally as .the lateralssupport hitherto afforded by. the spindle is removed.

The saidinterceptormay take the form of. a narrowplate or bar supported slidably beneath the ring. rail. and extending throughout the length of the machine or of a unitary section thereof, with .a connection at onev end tomeans by which theplate or bar may be reciprocated so that projecting portions thereof are engaged with or disengaged from a flange on each package carrier member. Preferably, two such plates are provided; being disposed in spaced parallel arrangement one infront of and 'theotherbehind'the spindle axes, with a yoke connecting said plates package support member shown separately, as

I viewed respectively fromopposite sides; Fig. 4

is a section of part of the'spinning unit shown in Fig. 1 immediately after thespindle rail" first reaches'the doffingposition, andFig. 5 isa fragmentary sectionon the line VV of-Fig. 4; Fig. 6 isasimilar view to Fig. 4, but depicts the second stage in the vdoiiing cycle; Fig. 7 isa section'ion the line VII-VII of Fig. 6; Fig. Sis :asimilar view to Fig. 1,, showing the third stage inthe dofiing cycle. (Figs. .2"to Bare drawn on a somewhat larger scale than Fig. 1.) Fig. 9 is a-section through a spinning machine, incorporating doffing mechanism as illustrated in Figs. 1 to1i3, and in which the separator plates are adapted to be moved outwardly to ensure positive do'fling.

The spinning unit to which. the present description relates comprises the known elements of a spindle I, rotatably mounted in a bolster2 which is suitablyfixed in the spindle rail 3', the spindle I wharve being indicated at l. During the spinning operation, the yarn package isbuiltupon a, bobbin, pirn or like tube which isplaced uponthe spindlathe noseof the package beingarranged .to rproject through a ring 5 carried in aringnrail 1. The traveller is indicated at Band the lappetguide at 9-. Fig. 1- depicts thepath of. the yarn as it is drawn from the drafting apparatus (not 1 ever assumed for the purpose of 'the present tension II of somewhat larger diameter, and a thin basal flange I2 in the underside of which is fixed a peg I3 for a purpose to be described. A leather or other resilient washer I4 is interposed between said flange I2 and the wharve 4. The extension H has a broad upper face in which is mounted a catch comprising a spring leaf I 5 and a pivotal block I6 which is urged to bear against the underside of the leaf I5 by a compressed spring I1. On the inner wall of the extension II, at a point adjacent said catch I5, I6, is mounted a cutter consisting of a fiat blade I8 having a vertical cutting edge I9.

The package carrier provides a shrouded seating for the bobbin, pirn or like tube upon which the yarn package is to be wound, the upwardly directed face of the body I0 of said package carrier being furnished with a quadrantal axial projection 20 which serves as a seat for the base of a bobbin or the like placed on the spindle, and said bobbin or the like being so located that the lowermost coil of yarn in the package wound thereon will occupy a position immediately above the upper face of the extension I I. The package carrier is made a loose fit upon the part 2| of the spindle blade I (see Fig. 8), so as to be capable of free axial and rotary movement in relation thereto.

The ring rail 1 is counter-bored beneath the ring 6 to provide a recess 22 capable of accommodating the flange I2 of the package carrier when the spindle is raised to the dofiing position, i. e. the position of the spindle relative to the ring in which the whole of the yarn package projects upwardly through the ring.

On the underside of the ring rail I are slidably. mounted two parallel interceptor plates 23 and 24; longitudinal slots 25 in the plates cooperate with studs 26 which depend from the rail 1 to guide the movement of the plates, the weight of the latter being supported by the heads of the studs. The two plates 23, 24 are arranged to serve a plurality of spinning units, and are adapted tobe slidden endwise at the appropriate times by mechanical means linked to a yoke 21 which is attached to the ends of the plates, and operating in synchronism with the packagebuilding and package-doffing mechanism. The plates 23 and 24 are fashioned with oppositely disposed inward lateral extensions 28 in respect of each spinning unit, and each extension 28 of the plate 23 includes a lug 29 so located that it will serve as an abutment for the peg I3 in the package support flange I2.

The doifing operation is performed in the following manner:

It is well known in ring spinning practice, that the yarn passing through the traveller between the drafting rollers and the spindle, causes the traveller to be revolved around the ring as the spindle rotates. The traveller rotates at a lesser speed than the spindle, thereby causing the yarn to be wrapped on the bobbin or pirn, the variation in speed of the traveller being governed by the delivery rate of the drafting rollers. Upon completion of the bobbin, the spindle rail 3' is raised to the dofilng position (Fig. 4), whereupon rotation of the spindles and the drafting rollers ceases. It will be noted that the yarn is now lying close against the upper face I I of the package carrier, but it has not entered the catch I5, I6 as this cannot happen whilst the package carrier is rotating at spindle speed, and the traveller revolving at a slower speed in the same direction. The interceptor plates 23, 24 are then moved from the inoperative position shown in Fig. 5 to the position shown in Fig. '7, in which the lateral extensions 28 of the said plates lie beneath the flange I2 of the package carrier.

A brief rotational impulse is now imparted to the spindle, but the rotation of the package carrier in relation to the spindle is arrested by the impingement of the peg I3 against the lug 29 of the plate 23. Immediately the package carrier stops, the revolving yarn enters the catch I5, IB thereby arresting the traveller, and as the spindle and bobbin continue part of a revolution the yarn between the bobbin and the catch I5, I6 is severed against the cutter I 8.

The relative positions of the catch I5, I6 and the peg I3 with respect to the spindle axis are such as to ensure that when the peg I3 abuts against the lug 29 of the plate 23, the package carrier is stopped when the catch I5, I6 is in the rearmost position as shown in Figs. 6 and 8. This arrangement ensures that the catch arrests the traveller in its rearmost position, and that the package is not impeded when this is doffed as hereinafter described.

The spindle rail 3 is now lowered, but the package carrier (and the bobbin or the like and the package supported thereon) are retained in the dofiing position by the presence of the interceptor plates 23, 24 beneath the package carrier flange I2, so that when the spindle rail reaches its lowermost position the tip of the spindle blade has been withdrawn completely from the bobbin,

or the like. The seat 20 of the package carrier upon which the base of the bobbin or the like has been resting, is so located that when the peg I3 is arrested by the lug 29 said seat will occupy a rear position. This arrangement, and the restriction of the support afforded by the seat 20 to a quadrant of the base of the bobbin, combine to predispose the bobbin and package to topple forwardly as soon as the lateral support hitherto provided by the spindle has been removed, and doifing automatically occurs at this stage.

If desired, the lateral displacement of the packages may be effected positively by an out-.

ward sweeping movement of the separator plates conventionally provided between adjacent spinning units, as shown in Fig. 9, for which purpose adjacent pairs of said plates 30 may be joined in the rear of each spindle position by a U-shaped connection which, when the plates are moved outwardly by the operation of a cam 3|, as desubject of my co-pending United States Applica--" tion No. 193,825, new Patent No. 2,570,057.

It will be understood that the translational movements of the spindle and the yarn package herein referred to are movements in relation to the ring rail and that the references herein contained to the package reaching the clotting p0 sition or the spindle being "withdrawn from the package are intended to include the case in which the doifing position of the package is reached by a movement of the ring rail and in which the ring rail raises the package from the spindle.

What I claim as my invention and desire to secure by Letters Patent is:

l. A ring spinning, doubling or twisting unit comprising, in combination, a spindle, a spindle rail supporting the spindle, a ring, a traveller supported on the ring, a ring rail supporting the ring, said ring rail being located above the spindle rail and the rails being mounted for relative vertical movement, a yarn package carrier detachably supported on the spindle, normally frictionally driven by the spindle, and normally occupying a fixed vertical relation to the spindle, said carrier including a yarn catch and a severing member, an interceptor carried on the ring rail and shiftable into carrier supporting position to the vertical relation of the carrier to the ring rail preparatory to doiiing, the interceptor including a stop member, said carrier in cluding a stop member engageable with the interceptor stop member for arresting rotation of the carrier with the spindle and the yarn package.

in motion to cause the yarn to be caught and held taut by the carrier catch and to be severed by the severing member, the interceptor serving to retain the carrier at the subsequent separation of the rail so that the yarn package will be supported with freedom for doffing by lateral displacement.

2. A spinning or like unit as claimed in claim 1 in which the unit is organized to require dofiing in a definite direction and in which the carrier includes a package engaging support for engaging the lower end of the package at only one side thereof, the support and the catch being located at the same side of the carrier, and the carrier and interceptor stop members being disposed to arrest the carrier with the support and the catch remote from the side of the unit toward which doffing is required to be effected.

3. A spinning or like unit as claimed in claim 1 in which the unit is organized to require dofling in a definite direction and in which the carrier includes a package engaging support for engaging the lower end of the package at only one side thereof, the support and the catch being located at the same side of the carrier, and the carrier and interceptor stop members being disposed to arrest the carrier with the support and the catch remote from the side of the unit toward which dofiing is required to be effected, the ring rail being formed with a recess in its under side for receiving the lower portion of the carrier when doifing is to be efiected, and the interceptor including inwardly projecting members movable beneath the carrier and an operating member for shifting the interceptor.

4. A spinning or like unit as set forth in claim 1 in which the yarn catch and the severing member of the yarn package carrier are located side by side to cause the yarn when engaged by the catch to be drawn taut across a cutting edge of the severing member.

5. A spindle or like unit as set forth in claim 1 in which the package carrier comprises an axially bored body having an upward annular extension of larger diameter than the bore and a thin basal flange, the carrier stop consisting of a peg depending from the flange, and the extension having an upper face mounting the yarn-engaging catch and an inner wall mounting the sever ing member.

6. A spinning or like unit as set forth in claim 1 in which the interceptor comprises two plates at opposite sides of the spindle axis each including an inward projection insertable beneath the carrier, and an operating member rigidly connecting the plates to one another at their ends.

"I. A spinning or like unit as set forth in claim 1 in which a member is mounted behind the vertical axis of each spindle for engaging the rear of the yarn package, and mechanism is pro- No references cited.

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