US2556674A - Spindle for tubular yarn carriers - Google Patents

Description

June 12, 1951 D. A. cABoTEr-AL SPINDLE FOR I'UBULAR YARN CARRIERS ATTQRNEY Filed April 26, 1949 Patented June 12,?*1951 SPINDLE FOR TUBULAR YARN CARRIERS Deane A. Cabot, Rumford, R. I., and Fausto G. De Santis, Quincy, Mass., assignors, by mesne assignments, to Reconstruction Finance Corporation, Washington, D. C., a corporation of the United States Application April 26, 1949, Serial No. 89,748

3 Claims.

This invention relates to spindles vfor spinning frames or analogous machines and more particularly, to a novel spindle structure especially adapted for use with top suspension tubular yarn carriers made of paper or of a cellulose ber composition, which are well known yarn carrying devices the upper portion of which is designed to be l erances for fits between the parts; by the facility with which it may be assembled without distortion or eccentricity; and by its eiectiveness in operation in that it provides for easy stripping after doing, is capable of low power consumption and retains proper balance vwhen rotating at high speed thereby avoiding the `undesirable difficulties and problems of unbalance which must be 'dealt with to obtain true running spindles and which will occur when spindles of the tube'type are used having barrels made of woodwhich `material is subject to inherent differences in density in different portions of the barrel and to dimensional changes in shape or form thereof caused by heat and humidity variations.

With the above and other considerations in mind, it is proposed in accordance with the present invention to include in the rotating structure of the spindle between the whirl and a top tip element an intermediate barrel member in the form of a metallic tubular element in radially spaced encircling relation about the spindle blade and forming a permanent part of the spindle. According to one feature of the invention, the

tube, in its preferred form, is composed wholly of a light weight metal, such as an aluminum alloy or a magnesium alloy, arranged to be secured at its opposite ends by frictional connection with an axial extension of the whirl and a tip element fast to the upper end of the spindle blade. The whirl with its axial extension and the tip element which forms the bobbin plug each are composed of a harder metal, such as cast iron and steel respectively. The tip element and the whirl extension each are provided with one or more resilient or elastic rings made of either solid natural or synthetic rubber compounds, of round cross-sectional form, one commercially available type being known under the trade name of O rings of which 2 one manufacturer is Linear, Inc., Philadelphia, Pennsylvania.

The various objects and advantages of this invention will be more apparent upon considering the rfollowing detailed description of a preferred embodiment of the invention illustrated in the accompanying drawings, and the novel features of the invention will Vbe particularly pointed out in the appended claims.

' In the drawings:

Fig. 1 is a vertical sectional View of a spindle constructed in accordance with this invention and rotatably supported inV a customary mounting, and showing a tubular yarn carrier in normal operaing position;

Fig. 2 is a fragmentary View in vertical section, on enlarged scale, showing the lower O ring in section and in a compressed state connecting the lower end of the tubular barrel member lto the Whirl;

Fig. 3 is a fragmentary view in vertical section, on enlarged scale, showing the top O ring in a compressed state connecting the upper end of the tubular barrel member to the tip member;

Fig. 4 is a perspective view of one of the elastic O rings prior to assembly on the spindle blade;

Fig. 5 is a fragmentary view in vertical section similar to that of Fig. 2 but on smaller scale and with the outer tubular spindle barrel and the paper yarn carrier removed;

Fig. 6 is a perspective view of the metallic retainer collar for the lower O ring, and shown prior to assembly on the tapered portion of the spindle blade within the whirl cup, and

Fig. 7 is a fragmentary sectional view of the lower cylindrical portion of the bobbin plug showing thel normal circular cross-sectional form of the O-ring prior to its assembly and insertion within the tubular barrel member.

` Referring first to Eig. 1, the spindle construction there shown comprises a blade member II) which may be of the usual form and may be mounted for rotation in any usual or convenient manner relative to a stationary support or base I2 aixed to the usual spindle rail I3. The blade member I0 has a tapered upper portion I4, a cylindrical bearing portion I5 and a tapered lower portion I6 terminating in a conical end portion II. A whirl I8 is fast to the lower part of the tapered portion I4 and includes an axial exten-y sion or acorn 20 the top of which is recessed (sce Fig. 5) to present a cup-like portion 2| with an upstanding annular rounded peripheral flange 22 having a vertical inner wall 23. vIn addition, vthe upper portion I4 of the blade is equipped with an encircling tubular barrel member 25 consisting of a hollow metal cylinder or tube made of a light metal such as an aluminum alloy or a magnesium alloy.-

Disposed interiorly of the cup 2Iand pressed onto the tapered portion I4 of .the spindle blade is a beveled retainer collar 26 of suitable metal.

having a smaller outer diameter than the inside diameter of the cup 2I to provide an annular groove 2l' of square cross-section between the vertical inner wall surface of the cup 2I` and the outer vertical circumferential face 26 of the collar 26.

Placed in the annular groove 2'! between the retainer collar 26 and the'inner vertical wall 23v of the ange 22 is a resilient or elastic O ring 3U of solid rubber-like material, made of either'k natural or synthetic rubber compounds, of round" cross-sectional form. Y

In practice, the O ring 35 may be of such .size and cross-sectional diameter that it will' lie snugly against the bottom and side walls of the groove 2. In assembly of the tubular barrel 25 with the whirl and with the Ol ring 36 initially positioned within the groove 2?, as just described, ythe lower end portion of the tube 25 is inserted finto the cup 2I and has an easy sliding iit or a hand push t with the-inside wall surface 23 of the annular ange 22 untilv the lower end of the tube engages the adjacent upper corner portion of the ring 36 whereupon the tube 25 in being forcedfurther downward against the O ring 3i! thereafter causes the ring to be compressed andrflattened against the bottom and vertical side Walls of the groove 2, as shownY in Fig. 2; y. At its upper end the tube 25 abuts an annular shoulder 35, Fig 3, disposed exteriorlyaround the lower part of a tapered tip element or bobbin plug 36 which is pressed onto the upper end of the tapered portion I oi the spindle blade member 36. The bobbin plug 36 is-there shown as having a stepped formation with a rounded top portion 3l and a tapered longitudinally extending body portion 38 which extends downwardly therefrom terminating at its base edge at the shoulder or step 35fornied at the meeting line of the reduced cylindrical end portion 39 with the body portion 8. `The bobbin plug 36 is counterbored from its lower endk to form the enlarged central cylindrical recess 46 extending inwardly of cylindrical pori tion 39 and communicating at its inner end with .the central bore 4I in the top wall of the plug 36. IThebore il has its sides formed to the same taper as the upper end of thetapered portion I4 of the spindleblade, and the tip ispressed tightly onto the spindle blade.

As shown in Fig. E, the cylindrical lower end portion 3.9 of the bobbin plug 36 extends within the tube and is slightly reduced and of smaller outer diameter than the inside diameter of the tube 25. rihe cylindrical portion 39 carries a .resilient or elastic O ring 45 which is positioned within a peripheral groove 46 formed at an intermediate section of the cylindrical portion and of square crosssectionhaving flat parallel side walls normal to the axis of the cylinder 39, as illustrated in Fig. 3. The O ring v@Slis of circular cross-section prior to its assembly vand insertion within the tubular barrel 25, as illustrated in Fig. '7. The inner perphery ofthe ..O- ring is slightly less in circumference than the circumference of the bottoni of the groove 46 in the bobbin plug 36 while the exterior peripheral circumference of the ring i5 is greater than Athecircumference of. the inner cylindrical {wallof the tube 25 so that when the O ring 45 is forced into the upper end of the tube 25 the ring 45 will be compressed into the cross-sectional shape shown in Fig. 3 of somewhat elliptical cross-section with flattened peripheral portions abutting the, side and bottom walls of the groove 46. Thus, when the O ring 45 is compressed within its associated groove, the ring liattens out from the circular cross-sectional form shown in Fig. 7 to that shown in Fig. 3 so that the peripheral portion of the ring contacting with the bottom of the groove 46 is at as Well as its outer periphery which directly contacts the inner cylindrical wall surface of the tubular barrel 25 at its top end. Likewise, both sides of the O ring 45 which are in contact with the side walls of the groove 46 become flattened out against the side walls since the width of the groove 46 is initially made slightly greater than the diameter of the circular cross-section of the Orfring 45. In one practical embodiment of the invention the bobbin plug 36 carriedl inthe groove 46 an O ring .45 theinside diameter of which was nine sixteenths of an inch and a circular section diameter of three thirty-seconds of aninch. The groove 46'was made one hundred eight thousandths of an.v inch in width or approximately iifteen thousandths. of an inch Wider than the circular section diameter of the ring 45While the depth of the groove. 46 was made such that the ring 45 of normal circular section, when installed in theA grooveV 4.6, projected` outwardly from the groovev to the extento from ten to twenty thousandths of an inch.

The bobbin or tubular yarn carrier shown in Figs. 1,2 and 3. is of a conventional formV and comprises a tapered tubular body portion50 made of paper., laminated bonded celluloseY fiber,` or otherl suitable material havingr the desired length and wall thickness, and provided' with an internal full-length taper conforming to. that of` the` tapered portion 33 of the bobbin plug 36 so that when the bobbin is pushed iirrnly onto the. bobbin plug the upper end portion interiorly of the bobbin. .will tightly eng-age the tapered exterior por.- tion 380i the bobbin plug and in thisway establish a detachable but positive driving connection of the bobbin 50 with the bobbin plug 36.

According to the preferred.v method of assembling the parts of the spindle, the whirl I8 isY first. pressed onto the tapered upper portion I-4 ofthe blade in accordance with the usual practice. employed in the manufacture of spindles. Next the beveled retainer ring 26 is placed upon the ta-` pered upper portion I4 of the blade and forced downinto tightlseating engagement with thefbottom of the cup 2I.v The resilient O ring 36. is applied over the upper end of the blade member II] and placed in the annular groove 21 between the retainer ring 26 and the inner wall surface of the cup 2|. v Y 1 Next, the barrel tube 25 is slid over the tapered upper portion I4 of the blade and pushedv down into the cup until the lower end of the tube seats upon the O ring 36. The tapered tip or bobbin plug 36 then is placed upon the tip endl of the tapered blade'portion I4r and forced down thereon in a suitable manner, asby means of a hydrau-l end of the tube 25 will rmly abut the shoulder 35, the resilient O ring 39 will be deformed as shown in Fig. .2` under endwise pressure of the tube 39, and the resilient O ring i5 will be compressed laterally into generally elliptical or flattened cross-section, as shown in Fig. 3, to rmly grip the inner peripheral surface of the tube 25 at its upper end.

It is to be understood that the length of the spindle blade portion i@ will be made to suit the particular length of bobbin or tubular yarn carrier to be normally employed with the spindle and, since such bobbins or tubes are made in a variety of sizes and lengths, the spindle blade section i4 accordingly will be made slightly longer than the length required for the bobbin length selected andthe excess material of the blade subsequently cut off after the bobbin plug 36 has been pressed tightly onto the blade at the desired predetermined location thereon with respect to the bottom of the whirl for the bobbin to be utilized.

lt will be observed from the foregoing description that the present invention provides a novel form of spindle construction for tubular yarn carriers which in the course of assembly operations eliminates any possible chance of bending the blade member during lpressing of the bobbin plug and tubular aluminum alloy or magnesium alloy barrel onto the spindle blade and whirl, respectively. It will be observed further that the O rings 38 and 45 eiectively isolate substantially both end portions of the tubular barrel 25 from the cast iron acorn of the whirl and the steel bobbin plug 38 respectively, thus eliminating any possibility of galvanic corrosion of the aluminum or magnesium tube which will generally be subject to such attack in assemblies with steel, brass, copper, lead, tin or nickel when moisture or other conducting liquids penetrate'into the joint.

What is claimed is:

1. A spinning spindle for tubular yarn carriers comprising a central support, a tip member fast to the upper end of said support, a whirl fast to said support and well spaced axially thereon from said tip, said whirl having an axial eXtension 'presenting an enlarged recess in its top end, a tubular barrel member spaced about said support and extending axially thereof between said whirl extension and said tip, said tip having a shoulder closing the upper end of said tubular member and a cylindrical lower end portion formed with a circumferential groove extending within the upper end portion of the tubular member and in radially spaced relation thereto, an annular resilient rubber member within said groove and in a compressed state radially between the inner surface of the upper end of said tubular member and the exterior of said cylindrical end portion of said tip, and an annular resilient rubber member within the recess of said axial extension of said whirl and in a compressed state 8 Vforming a bottom seat yieldably supporting the lower end of said tubular barrel member.

2. A spinning spindle for tubular yarn carriers comprising a blade member, a whirl fast to said blade member, the top of said whirl being recessed to provide a cup portion with an upstanding annular outer flange, a tip member fast to the upper end of said blade member, a tubular barrel member about and spaced from said blade member, said tube extending between said tip member and said whirl and having its lower end disposed within said cup and engaging the inner surface of said annular flange with a sliding fit, an annular resilient rubber O ring member within said cup and abutting the bottom end of said tube, said ring being held in a compressed state to seat and yieldably support said tube, and an annular resilient rubber O ring member in a compressed state and radially disposed between the upper end portion of said tube and said tip member.

3. A spinning spindle for tubular yarn carriers comprising a blade member, a whirl fast on said blade member and having an axial extension the top of which is formed with a cup-like recess, a tip member fast to the upper end of said blade member, a tubular barrel member spaced about and extending between said whirl and said tip, said tip abutting the upper end of said tube and having a reduced cylindrical lower end inserted within but spaced radially from the upper end portion of said tube, an annular resilient rubber O ring member carried by said reduced end portion of said tip and having a tight litV within the upper 'end of said tube, the lower end of said tube extending within said cup-like recess of the whirl and engaging the annular outer walls of said cup with a push-fit, an annular metallic retainer member within said cup and fast to said blade member, the outer peripheral surface of said retainer member and the inner wall surface of said cup defining an annular groove within said cup, and an annular resilient rubber O ring member within said groove and being held in a downwardly compressed state to form a bottom seat yieldably supporting the lower end of said tube within said cup.

DEANE A. CABOT. FAUSTO G. DE SANTIS.

REFERENCES CITED The following references are of record in the le of this patent:

, UNITED STATES PATENTS Number Name Date 2,168,248 Staufert Aug. 1, 1939 2,246,475 Stahlecker June 17, 1941 2,485,959 Davies Oct. 25, 1949 2,488,879 Pichette Nov. 22, 1949 Y FOREIGN PATENTS Number Country Date 562,849 Great Britain July 19, 1944

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