US2339372A - Spindle and bobbin construction - Google Patents

Description

Jan. 18, 1944.4 R. P. BENNETT SPINDLE AND BOBBIN CONSTRUCTION Filed Maren s. 1941 ATTORNEYS Patented Jan. 18, 1944 SPINDLE AND BOBBIN CGNSTRUCTION Rexford VP. Bennett, .Honesdala Pa., assignorto Clover Leaf Manufacturing Co., a corporation of Pennsylvania Application March `8, 1941, Serial No. 382,278

9 Claims.

for example, `it is now customary to use speeds of 12,000 to 14,000 R. P. M. and in some cases as high as 16,000 R. P. M. In spinning Silks, still higher speeds have been attempted. vThese extremely high speeds of operation increase the tendency of the bobbin to vibrate and pound on the spindle regardless of how fine a tolerance is provided between the size of the bore and the size of the spindle. While the bores of bobbins have heretofore been designed to closely fit theblades of spindles with a view to eliminating vibration and wobble at high speeds, nevertheless vibrations of minute amplitude are created which cause the bores of the bobbins to be pounded out to an oversized condition within a relatively short period of time. This oversized condition of the bore of a bobbin permits the bobbin to wobble and puts increased strain on the machine. It also increases the tendency of the bobbin to climb or bob up and down on the spindle and thereby increases the danger that it will ilyV 01T.

According to my invention, I provide a bobbin with a bushing of a novel construction presenting spindle-engaging surfaces backed by a resilient material interposed between the bobbin proper and the bearing surface of the bushing whereby vibrations that might otherwise be imparted by the spindle blade when operating at high speeds' are absorbed without the occurrence of the objectionable `wobbling and pounding effects heretofore experienced;

Another feature of the invention resides in the provision of a spindle having a bobbin rest provided with an annularly arranged inclined surface and a bobbin'with a base having as'imilarly inclined' surfaceV adapted to engage the inclined surface of thev bobbin resi; driving relation, the engagement being such that the Weight of the bobbin maintains the surfaces in effective4 driving relation, even at extremely high operating speeds while at the. same time. an operator may easily release, removeY and replace4 theV bobbinwhile the `bobbin is still travelling at considerable speed. l y

A further `feature of the inventionis the provision of a sturdy and 'relatively simple bobbin construction having a resilient vbushing vdisposed at one end thereof -to absorb vibrations between the bobbin and the spindle, and means 'at the opposite end ofthe bobbin to hold the'same in close driving relation With respect to the spindle without binding thereon. l

A still further feature of the invention is the provision of a bobbin having a bushing adapted to fit closely the vbase of the Vspindler blade and another bushing backed by resilient material adapted to engage a portion of the blade spaced from the base thereof whereby relative movements between the bushings and the blade at high operating speeds are substantially eliminated.

Additional features of the invention will be come apparent upon consideration of the follow-y ing detailed description to be read in connection with the accompanying drawing, in which:

Figure 1 is a fragmentary plan view of lthe upper end of one form loi a bobbin embodying the novel bushing construction of the present invention; y Figure 2 is a vertical sectional View of the bobbin taken along line 2--2 of Figure 1 andY showing the bobbin mounted on a spindle for a thread doubling operation;

Figure 3 is a bottom plan view of the'bobbin as viewedalong the line 3-.3 of Figure 2;

Figure 4 is a vertical sectional view of the bobbin mounted ony a spindle for a thread twist- F ing oper-ation Figure 5 is a View in vertical section with parts broken away showing a bobbin and a spindle construction embodying a modied form of the driving means of the present invention; and

Fig, 6 is a view vin. vertical section. with parts broken away showing a bobbin and a spindle construction embodying another modied form of the driving means of the present invention.

Referring to Figures 1, 2 and 3 of the drawing, a spindle IU is shown provided with the usual whorl I2, a bobbin rest I 4 and a blade I6. The rest I4 is provided with pins I8 adapted to be received in recesses in the end of a bobbin and to provide positive driving eng-agement with a bobbin placed upon the spindle. The blade I6 is enlarged at 20,to` center and closely receive the lower portion of af bobbin bore.

The bobbin of the present construction is shown as comprising a body member 2'2f made" of wood or other suitable relatively light weight material to which end pieces 24 and 25 are attached. These may be made of laminated fiber, metal or other suitable material. The body member 22 is provided with a bore 26 which is slightly enlarged at both ends to receive bushings 28 and 34. The bushing 28 at the lower end of the bobbin is made of metal or other wear resisting material and is adapted to fit the enlarged portion 2,0`1of Ethe spindle blade with only slight clearancel A clearance of not more than .002" is recommended.

The bushing 34 at the opposite end of the bobbin is made up of an outer tubular member 33, an inner tubular member36 made of brass or other wear resisting and lowfriction material, and a resilient filler material 38 interposed therebetween. The interposed material 38 may consist of rubber or other material having suitable resilient characteristics, the material being vulcanized to the members 33 and 36 or held therebetween by other suitable means. The outer end of the tubular member 33 is shown as flared at 40 to assist in` holding the bushing in position on the'hody 22. The end piece 24 is provided with a central opening in lwhich* a protective cupshaped element 42 is held with the inner edge thereof against the flared portion 40.

Adjacent the bushing 28 and attached on the outer or lower side ofthe end piece 25 is a base member 30 made of a phenolic condensation product, rubber, cork or other material suitable for friction driving purposes as hereinafter more fully described.v As shown in Fig. 1, the base 30 is provided with openings 32 to receive the pins lfand in this way establishes a positive driving connectionwith the spindle. It is preferred to provide the bobbin with the base member 30 and to provide'the openings 32 therein, since by so doingY the rbobbinAmay be positively driven from thefspindle as in a doubling operation or vit may beusedjwith the modified types of bobbin rest shQwn-inFigs. 4 and 5 intwisting operations. However, it willbe understood that the advantages derived from the use of my novel bushing construction may be realized, particularly in doubling operations, by omitting the base memberllandforming the pin-receiving recesses or openings `32 in the end piece 25a, as shown, by way of example, in'Fig. 6, wherein like numerals referto corresponding elements shown in Fig. 2.

In using thebobbin for a doubling operation the bobbin is yfirst placed upon the spindle HJ with the bushing 28 fitting rather closely about the enlarged portion 2D and the bushing 34 closely engaginggthe upper end of the blade .16. The bushing 34 with its loading of rubber or other resilient material 38 acts to absorb vibrationin conjunction with the bushing 28 and thereby overcomeany tendency of the bobbin to wobble and as a consequence there is little tendency for the boreopening to wear and become enlarged. In addition, the close fitting resilient engagementof thek upper bushing 34 with the spindle blade serves to. minimize any tendencyof the bobbin to Walk or` raise up on the spindle blade even when thebcbbin is being driven or rotated at high speeds.

When a sufficiently large bundle of doubled thread has been spun onto the bobbin, the bobbin is removed from the spindle l and may then be placed upon a spindle adapted to `perform a twisting operation and usually operated at a relatively high speedas compared with doubling. In Fig. 4 there is shown a spindle 50 adapted for twisting operations and provided with a novel bobbin rest and driving connection for coacting withthe bobbin hereinbefore described. This spindle is provided with a bobbin rest 52 which has a peripheral flange 54. 'I'he inner surface 56 of the flange 54 is inclined slightly with respect to the axis of the spindle. The base 30 of the bobbinl is shaped as a f rustum of a cone thereby presenting an outer peripheral surface 51 which is inclined to the axis of the bobbin.

, When the bobbin is placed upon the spindle 55,

the inclined surfaces 56 and 51 engage and when the bobbin is being driven it serves to establish a friction engagement which acts to overcome any tendency of the bobbin to move up the spindle blade and fly off.

It is important that the inclination of the sul'- faces 56 and 51 shall be so selected as to insure `satisfactory performance. The optimum inclination may vary somewhat with the friction characteristics and other properties of the material used in forming the surfaces 56 and 51. When using 'a'Bakelite'resim I find that the inclination; for best performance, should be between about 6 to 8 degrees with the vertical.A An'inclination Vof about '7 degrees has been found to give satisfactory operation at extremely high operating speeds. With the inclination of the surfaces 56 and 51 at about '1 degrees the bobbiny even when manually urged upwardly from the bobbi'n rest while travelling at extremely high speeds, promptly returns to the driving surface 56 and assumes a steady and smooth operation. With this inclination forthe friction driving surfacesfthe bobbin does not bob up and down on the spindle or produce a wobbling effect. If the inclination is much less than 6 degrees the bobbinha's a tendency to bind and become diniclt to remove from the spindle. If the inclination of the surfaces 56 and 51 are made more than 8 or 9 degrees, the bobbin has a tendency to'hoblupwardly on the spindle.

-Thefabove described advantages of the annularly disposed inclined driving surfaces of the bobbin and spindle are greatly enhanced by the rubber-loaded bushing 34. Since the bushing 34 atthe top of the bobbin provides a resilient absorbing medium for vibration produced at high operatingV speeds, the effect thereof is to dampen vibratorytendencies of the bobbin and thereby maintain the same properly centered with the friction surface 51 in substantially even contact with the surface 56.

Referring to Figure 5 of the drawing, a modified arrangement of inclined driving surfaces is provided between the spindle 60 and the bobbin base'62. In this form the outer surface 64 of the peripheral flange 66 of the bobbin rest 61 is inclined tothe axis of the spindle. The base 62--offthe bobbin is provided with a peripheral flange V68, the inner surface 10 of which is lnclined to the axis of the bobbin. These inclined surfaces are of substantially identical inclination and-whenV engaged provide a'close lateral fitting relationas well as an excellent friction driving engagement: Y

- By locating the driving surfaces of both forms (Figs. 1-4 and Fig. 5) outwardly a distance from parting from thelspirit thereoffft shouf @geen tions Yf my mention are ppssiblewiihw ...de-

. there fore,"be understoodthat the'forrns ojf he invention herei n illustratedand"describediare"intended to'jbe illustrative only 'not'aslimi'tingthe `scope thereof. 'i "I claim:

1. A bobbin for use in doubling and lllsting yarn adapted to"b'e"mcun`ted"o'n theblade and bobbinr'est 'of' a spidlefor operation at'high speeds, said bobbin having a bore to receive the blade and a base adapted to be received on the bobbin rest for driving engagement therewith, a

bushing at the end of the bore adjacent said base to engage the portion of the blade adjacent the bobbin rest and a second bushing adjacent the opposite end of said bobbin, said second bushing including a tubular metallic member adapted to closely receive a portion of said blade, said tubular member being spaced from the body of said bobbin by an annular body of a highly resilient material which acts as a cushion bee tween said tubular member and the body of said bobbin throughout the length of said tubular member.

2. A bobbin for use in doubling and twisting yarn adapted to be mounted on the blade and bobbin rest of a spindle for operation at high speeds, said bobbin having a bore to receive the blade and a base having a vertically inclined surface disposed annularly adjacent the periphery thereof and adapted to be received in friction engagement with a similarly inclined sur-y face on the bobbin rest whereby to establish a driving relation between said bobbin rest and said bobbin, and said bore being provided adjacent its outer end with a tubuluar metallic ele ment backed throughout the length thereof by aresilient material and having an inner diameter such as to closely receive the upper portion of said blade.

3. A bobbin for use in doubling and twisting yarn comprising an elongated body having a bore lengthwise thereof and a bushing mounted therein adjacent the outer end of said bobbin including a pair of concentrically arranged spaced tubular elements and a highly resilient material disposed therebetween throughout the length thereof, and the inner of said tubular elements being made of a wear-resisting metal and having an inner diameter such as to closely receive the upper end of a spindle blade When the bobbin is mounted thereon.

4. A bobbin for use in doubling and twisting yarn comprising an elongated body having a bore lengthwise thereof, a bushing in one end of the body including a metallic, wear-resisting tubular element spaced from the wall of said bore and a highly resilient material disposed between the element and the wall of said bore and extending throughout the length of said element, and means at the opposite end of said body for establishing positive driving engagement with a driving means and for maintaining said bobbin positively centered with respect to the axis of rotation of said driving means.

5. In a spinning machine for doubling and twisting yarn, in combinationla spindle having a, blade and a bobbin rest, the bobbin rest being provided with an annularly `disposed vertically inclined surface, and a bobbin having a bore to receive said blade and a base adapted to be received on said rest with a portion thereof in engagement with said inclined surface, said inclined surface being at an angle between 6 and 9 degrees to l,the verticaLsaid l bore being pgcjovicled with a:'fabiani10jmriter` l etanicshi posed'adjac` t'ftliefouter end of ,said bobbin 2and havlinganV inner "diameter" such as' toclosely fre# thelbobbin'is mounted thereon. Y l

6'. In` l'a spinning machine lfor doubling and twisting yarn, in Acombinatin, a spindle having Acei'vefar'i vuppery porticfin` Aof"aspindle blade when j abla'de and a bobbin'resdthe bobbin rest s provided withan annularly disposed vertically inclined surface, and a bobbin having a bore to receive said blade, a base provided with an annularly disposed inclined surface adapted to be received in engaging relation with the inclined surface on said rest, said bore being provided with a rubber loaded tubular metallic bushing disposed adjacent the outer end of said bobbin and having an inner diameter such as to closely receive an upper portion of the `spindle when the bobbin is mounted thereon and said vertically inclined surfaces being so adjusted as to inclination as to establish and maintain a friction driving enga-gement between said bobbin and the bobbin rest when the bobbin is driven at speeds attained in twisting operations and at the same time being so adjusted as to permit the driving engagement to be easily broken when the speed of the bobbin has been reduced.

7. In a spinning machine for doubling and twisting yarn, in combination, a spindle having a blade and a bobbin rest, the bobbin rest being provided with a peripheral flange with one side thereof inclined at an angle Vbetween 6 and 9 degreesl to the vertical, and a bobbin having a bore to receive said blade and a base provided with an annularly disposed similarly inclined surface adapted to be received in engaging relation with the inclined surface of Asaid flange, said bobbin having at the outer end ofthe bore thereof .a tubular bushing composed of a hard, wearresisting materia1 and adapted to closely receive the upper end of the spindle blade, and said bushing further including an annular body of a highly resilient material extending throughout the length of the said tubular member and acting as a cushion between said bushing and the body of saidbobbin.

8. In a spinning machine for doubling and twisting yarn, in combination, a spindle having a blade and a bobbin rest, the bobbin rest being provided with a peripheral ange with the inner surface thereof inclined at an angle between 6 and 9 degrees to the vertical, anda bobbin having a bore to receive said -blade and a baseof frusto-conical shape adapted to be received on said rest with the outer conical surface of said base in friction driving engagement with the similarly inclined inner annular surface of said flange, said bobbin having at the outer end of the bore thereof a tubular bushing composed of a hard, wear-resisting material and adapted to closely receive an upper end `of the spindle blade, and said bushing further including an annular body of a highly resilient material extending throughout the length of the said tubular member and acting as a cushion between said bushing and the body of said bobbin. Y

9. In a spinning machine for doubling and twisting yarn, in combination, a spindle having a blade and a bobbin rest, the bobbin rest being provided with an annularly disposed 'vertically inclined surface, and a bobbin having a bore to receive said blade, a base provided with an annularlyl 'disposed inclined surface adapted to be received in engaging relation with the inclined surface ori `sairenest',`` said` Bere. bem'g vpinfiiecil with a bushing mounted therein toward the end there@ of remote frein said base,r said bushing'incliiding a hard, wear esisting 4tubular element adapted t'o closely receive the olteriend lofythe spindle blade when the bobbin 4is rnou'nted thereon and a highly :resilient material disposed between said tubular element and the wall of said bore and extending aleng the length ofdsaid elerfnent,l and said vertically inclined surfaces beings adjusted as to .inclination Yas to establish and maintain a friction driving engagement between said bobbin and the bobbin rest when the bobbin is driven at the high speeds attained in twisting operations and at the same time being so adjusted asto permit the driving engagement to be easily b roken when the speed f the bobbin has been reduced'.

' REXFQRD P. BENNETT,

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