US1772766A - Machine for spinning, doubling, twisting, and the like, yarns, fibers, and the like - Google Patents

Description

Aug. 12, w36. 3,772,766

T. E. ANDREW ET AL MACHINE FOR SPINNING, DOUBLING, TWISTING, AND THE LIKE, YARNS, FIBERS, AND THE LIKE Filed Nov. 18, 1927 2 Sheets-Sheet l fil il i 'Me/0n 005.5796777 LWZJ@ T. E. ANDREW ET AL MACHINE FOR SPINNING, DOUBLING, TwIsTING, AND THE LIKEYARNS, FIBERS, AND THE LIKE Filed Nov. 18, 1927 2 Sheets-Sheet 2 QN N @W LW. W

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Aug. l2, 193@ Patented Aug. 12, 1930 ilrEn STATES PATENT OFFICE THOMAS EDWIN .ANDREW AND MELON LANGSTRETH, OF ROCHDALE, ENGLAND, AS-

SIGNORS T DUNLOP COTTON MILLS LIMITED, 0F LONDON, ENGLAND, A BRITISH COMP l.

CHINE FOR SPINNING, DOUBLING, TWISTING, AN D THE LIKE., .i

THE LIKE v.Application led November 18, 1927, Serial No. 234,233, and in Great Britain April 20, 1927.

rThis invention relates to spinning, twisting,.doubling or the like machines of the kind, hereinafter called double twist machines, adapted to impart two or more twists g 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 m relatively ,fast at points adjacent the windoii spool and the take-up spool respectively, n

' there arises a certain di culty in mounting the relatively fast point associated with the last said leg and it is the usual practice to`v carry the saidv fast point upon a structure itself mounted stationarly upon the rotating driving spindle, the said structure being suitably weighted to prevent its rotation fwith the said spindle. i p

The object of this invention is the provision of means as indicated in the preceding paragraph which shall be comparatively simple in construction, inexpensive, and highly efficient. Such means hitherto have usually been intimately associated with the devices or structure provided for guiding or tensioning the yarn and have thereby, said structure itself usually being of acomplicated nature, necessarily been characterized in an undesirable'complication. Now our invention allows facility for the utilization of' guiding and tensioning means dissociable from the said mounting means, it being one advantageous lfeature of mounting means according to our invention, that the same are entirely dissociable from the guiding and tensioning means.

Inour invention a frictionless bearing is inserted between the rotary part or spindle carrying the yarn twisting and guiding means and the stationary bobbin holding parts. This frictionless bearing comprises a part carrying a raceway and mounted co-axially on the rotating spindle and rotating with it, and a complementary part on which the bobbin is mounted and which remains stationary. The complementary stationary member is maintained stationary by a weight mounted on this member and the bobbin is mounted on this stationary member. The weight is preferably so positioned as to balance the weight of the bobbin longitudinally of the bearing and a guide is provided to prevent engagement of the weight or other stationary part by the flying thread or yarn. The frictionless bearing is preferably fornied of two longitudinally spaced bearing parts and the weight is so mounted as to bring the 'point of application of the resultant weight of the weight and bobbin between these parts. The stationary bobbin holding.

bearing member may be either the inner or the outer member of the frictionless bearing.

In order that our. invention. may be more clearly understood and readily carried into eiiept the same will now be described with reference to the accompanying drawings in which Figs. l and 2 illustrate, more or less diagrammatically the general principle of double twist machines as embodied intwo diferent schemes for carrying it into effect.'

Figs. 3 and 4 show respectively alternative arrangements of the mounting means according to this invention as applied respectively to the two said different schemes for twisting.

Fig. 5 shows the mounting means illustrated in Fig. 4 as it might be applied to the twisting scheme shown in Fig. 3.

Fig. 6 shows an arrangement ofthe mounting applicable particularly when the aXis of the bobbin is partially inclined to the vertical.

Referring to the drawings Figs. l and 2 eachillustrate, more or less diagrammatically, the general principle of double twist machines, said figures of course being shown merely by way of eXempliiication-to illustrate respectively the path of the yarn in the two arrangements, shown in Figs. 3 and 4;, which we have chosen to illustrate how our invention may be carried in to ellect.

The yarn in transit during treatment--thc travel direction of the said yarn being indicated by the arrows in the drawings-is formed into a loop held relatively fast by any suitable means at points-a-adjacent to the wind-off spool a and-b--to the take-up spool b respectively and the loop is rotated at a point c upon its closed end c so that one leg d of the said loop rotates about the other leg e thereof. Thus two twists are imparted to the yarn one between each respective relatively fast point-a and -and the rotary point c. l

In our present invention the non-rotating Wind-oft1 spool or bobbin a is mounted on the free end of a rotating spindle 1 by a frictionless or substantially frictionless bearing which permits the spindle to rotate freely at a high speed without imposing any appreciable torque or rotating strains on the bobbin or Wind-oil' spool. rlo ensure the Wind-olf spool against rotation a means is secured to it the weight of which is sullicient to resist any slight turning strain that might be imparted through the frictionless bearing. This weight is carefully suspended from the spool so as to counter-balance the weight of the latter on the bearing. The bobbin or spool is preferably detachably mounted on the frictionless bearing and it will be apparent that a wide variety of forms of mounting may be used within the scope of the invention.

Means according to our invention for efliciently and simply meeting the exigencies indicated in the third paragraph hereof may comprise; as shown in Fig. 3 upon'the driving spindle 1 an extension 2 adapted to form part of the inner member of a ball bearing and to carry the inner raceways of a pair of longitudinally spaced ball races 3. Spanning the outer races of the said bearing is the bobbin carrying structure-a tubular sleeve 4 forming part of the outer member ofthe frictionless bearing, wherein the said outer races are rigid or fast. The bobbin spool 5 is recessed at 6 to fit over the said sleeve 4: whereupon it is held by friction. The weight provided completely to obviate the possibility of rotation of the bobbin with the spindle is provided by a member 7 dependent from the aforesaid tubular sleeve as shown in the drawings.

This embodiment of our invention-as in Fig. 3--is applicable particularly to the arrangement illustrated in Fig. 1 wherein the yarn passes through the spindle via the bore of the bobbin spool and a tensioning device housed therein. Now in Fig. 4 We show an embodiment more particularly applicable to the arrangement illustrated in Fig. 2 wherein the yarn passes through the spindle directly via a tensioning device upon the structure carrying the bobbin. Here the spindle 1 is recessed as shown at 8 to form part of the outer, non-rotating member of the frictionless bearing and to take ball journal .bear- -support in Fig. 3.

ings 9, the outer races of the said bearings,

being fast in the said recess and suitably spaced therein as shown in the drawing.

The bobbin carrying structure in this instance has a cylindrical extension 10 adapted.

to lit into the bore of the inner races of the bearings wherein itis held by friction and to thus form part of the inner stationary part of the bearing.

The said extension carries the retarding weight 11 as shown in the drawings and therefrom it will be apparent that our invention provides facility to balance or partly to balance the weight of the parts over-hanging the said bearings, the arrangement shown in Fig. 4 being such that the said weight 11 functions also to that end.

It will be apparent that we are not limited in general or in detail to these two particular embodiments or applications of our invention.

It will be obvious that the form of mounting means may be varied and that the mounting means shown in one modiication may in an embodiment of the invention be applied to the bobbin and spindle arrangement of other forms of the invention.

Again, we do not limit ourselves to any particular co-acting of the recess G with its For instance parallel surfaces are shown while in Fig. 5 the co-acting surfaces are complementarily coned. Again suitable positive keying means may be provided.

Further it will be' apparent that we do not confine ourselves to a horizontal disposition of the spindle: it may for instance be disposed substantially vertically only slightly inclined to allow the weighting to function. Then as is exemplied in Fig. 6 we might utilize ball thrust bearings 3 in association with the ball journal bearings 3.

In general however', it should be understood that we do not limit ourselves to the type of ball or roller or similar bearing utilized. For instance we may use ball or roller or similar combined journal and thrust bearings--inl the stead of bearings either as in Figs. 3, 4 and 5 or in Fig. 6. Or again the arrangement shown in Fig. 6 maybe applied to horizontal mountings.

And finallyl it should be understood that our invention is not limited to the type of double twisting machine indicated in Figs. 1 and 2 as it will beapparent that it is applicable also to other machines adapted to impart two or more twists to the yarn and wherein arise such eXigencies as are indicated in the third paragraph hereof. It will be apparent also that it may be applied to arrangements utilizing more than one package of yarn whereof the respective yarns are themselves twisted and twisted or cabled together.

Having now particularly describel and ascertained the nature of our said invention and in what manner the same is to be performed, We declare that what wefclaim is l. An apparatus of the type described which comprises a bobbin spindle having an axial supporting extension at its free end and a central yarn passage through said extension and spindle, rictionless supporting bearings having one member mounted on said spindle, and a free member, a bobbin removably mounted on said free member and a weight on said free member to oppose rotation of said bobbin about the axis of said spindle.

2. An apparatus of the type described which comprises a rotating driving spindle, a frictionless bearing having a member bearing on the free end of said spindle and a free member, said bearing having a central yarn passage therethrough, a projection on the free member of said bearing and a bobbin havin a recess to receive said projection.

3. n apparatus of the type described which comprises a rotating spindle, a bobbin mounted on the free end of said s indle, frictionless bearings between said obbin and said spindle and a rotation resisting weight suspended from said bearings in position to counter-balance the weight of said bobbin on said frictionless bearing.

4. An apparatus of the type described which comprises a rotating spindle, a bobbin holding frame mounted on the free end of removably mounted on said free member, said spindle having a yarn passage from said bobbm centrally through said spindle and opening laterally therefrom, and non-rigid means acting on said free bearing member to prevent said bobbin from rotating axially with said spindle. e

In Witness whereof, we have hereunto signed our names.

THOMAS EDWN ANDREW.

MELOlTk LANGSTRETH.

saidspindle, a frictionless bearing between said bobbi'iholding frame and said spindle a rotation opposing. weight mounted on said bobbin frame and a bobbin rotatably mounted in said frame on an axis at right angles to that of said spindle.

5. An apparatus of the type described which comprises a driving spindle, said spindle having a central yarn passage and a side opening therefrom,.a ball bearing having a free member and a member mounted on the outer end of said spindle and coaxial with said passage, a bobin removably mounted on said free ball bearing member, and a weight on said free ball bearing member to op ose the rotation of said bobbin about the axis of said spindle.

6. An apparatus of the type described which comprises a spindle, a rictionless Supporting bearing comprising two members, one free and one secured to said spindle, a

bobbin removably'mounted on said bearing said spindle having a yarn passage from said bobbin centrally of said spindle and com. municating with va lateral passage throughv tionless bearing having a member mounted on said spindle and a free member, a bobbin

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