US1265947A - Bobbin-clutching means for rotatable spindles. - Google Patents

Description

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UNITED STATES PATENT OFFICE.

CHARLES E. NUTTING, or HOPEDALE, MASSACHUSETTS, Assrenon To nnArnn cont-o RATION, or HOPEDALE, MASSACHUSETTS, A CORPORATION or MAINELV' 1 IBOBIBIN-GLUTCHING MEANS ronRoTATABLn srrnnnns.

Specification of Letters Patent. Patented May 14, 1918.

Application filed October 31, 1917. Serial No. 199,469.

I To all whom it may concern:

v Be it known that I, CHARLES E. NUTTING, a citizen of the United States, residing at Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Bobbin-Clutching Means for Rotatable Spindles, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to bobbin driving means-for rotatable spindlesfor spinning, twisting and similar apparatus of that type wherein a rotatable bobbin rest and spindle is provided with a plurality of concentrically arranged centrifugally-acting bobbinclutching means for holding the yarn. carrier or bobbin securely in place upon the spindle.

Itis desirable in this type of spindle to provide means located between the spindle and the bobbin-clutching members which shall be yieldingly actuated vertically to effect in cooperation with the said members the equal and symmetrical expansion or outward movement thereof and also to provideradially interengageable means on said spindle and on said bobbin-clutching membersnear the upper ends of the bobbinclutching members for the purpose of restricting the radial outward movement'of the upper end of the bobbin-clutching members when thespindle is running bare. The means employed for thus'yieldingly radially expanding the bobbin-clutching 'members is usually a vertically actuated device such as an upwardly spring pressed cam shaped ring engaging cam surfaces on the interior of the bobbin-clutching members, and there is therefore always a positive tendency to raise the bobbin-clutchingmembers vertically. The effect of this action is to bringthe bobbinclutching members into vertical engagement with the means on the spindle for limiting the radial movement of the'upper. ends of and yieldingly actuated expanding means,

means carried by the bobbinfrest ndl gagingthe lower ends; of the bobbin-clutching members and acting therebyto prevent the bobbin-clutching members from having the. undesirable vertical; movement and thus preventing vertical engagement ofthe ra di ally interengageable. ,means employed. to limit radial movement ofthe bobbin-clutching members while at the same time-permit? ting the required radial movement, of the bobbin-clutching member'se More specifically the invention prov-ides a construction: inwhichtheibobbin rest is provided with a vertical annular recess, in which the bobbin-clutching,members are provided with radially vprojecting feet having an annular groove on the upper surface thereof, and in which anexpansible ring is inserted in the recess in the bobbin rest and heldfin engagement therewith over the groove in the feet so as to prev'entthe vertical movement i of the bobbin-clutching members whilepermitting :the required. radialmovement thereof. v

These and other features of the invention will more fully appear from the accompanying description and drawings and will be particularly pointed out in the appended .ClttilIIlS-v The drawings show so much of'a rotatable spindle as is necessary to a disclosure of the present invention.

In the drawings, F g

. Figure ,1 is a side elevat-ionof a rotatable spindle provided with a preferred embodiment of the present .inyention, some of the parts being broken away to show a portion of the construction and the lower end of, a bobbin being shown in vertical cross section mounted thereon;

a .Fig. 2 is a View similar to Fig. 1 with a portionof the construction shownin vertical cross section. and with the bobbin removed showing'the parts in the position assiuned when the spindle is running bare;

Fig. 3 is a view inhorizontal cross taken on the line aa -wof Fig. 1; e

Fi 4 is a view: in vertical cross section of a detail of. the. construction shown inv Fig. 2 with the parts muchenlarged.

The'g'eneralconstruction is of a familiar type including the vertical spindle 1 .projecting upwardly from, and concentrically secured in, the bobbin rest 2. The usual whirl 3 afi'ords the means from which" the section entire device is given the necessary rotation.

The lower end of a bobbin 1 of usual type is shown in cross section in Fig. 1. This bobbin is provided with a verticalbore fitting over the spindle 1 and at its lower end thisbore is enlarged at 5 to fit over and en gage the bobbin clutching means by which the bobbin is held fast to, and-concentrically with, the spindle thus securing its rotation with the spindle.

A plurality of bobbin-clutching members 6, herein shown as three in number, are mounted upon the spindle'and bobbin rest and rotate bodily-therewith. The exterior surface of these bobbin-clutching "members is generally cylindrical and conforms to the inner surface of'theportion 5 of'thebore of the bobbin, the extreme upper ends 7 of the bobbin-clutching members being curved inwardly to permit the bobbin readily to be slid thereover.

In the construction illustrated as embodying the preferred form of this invention these bobbin-clutching members at their lower ends are provided with radially projecting flanges or .feet 8. The inner lower edge is chamfered off at 9more readily to permit thedesired rocking movement ofthe clutching members. Onthe upper surface of the feet S'an annular groove 10 is provided.

The bobbin rest 2 is provided'with a vertical recess 11 therein extending concentric with the spindle 1 and down below the surface 12 upon which the'butt of the bobbin is seated when in place. On the interior vertical wall 13 of this recess an annular groove 14 is formed. The bobbin-clutching members are assembled with their lower ends located inthe recess l'la'nd'then an expansible split ring 15 is forced downwardly until it snaps into the groove 14 and fits over the groove 10 in the upper surface of the feet 8.

The bobbing-clutchin members'are given a positive radialexpan ing movement 'by a means located between the spindle and the said members which is 'yieldingly actuated vertically to effect in cooperation with'the said members the required expansion there of. For this purpose the bobbin-clutching members "are shown as'provided upon their interior surfaces with'ani annular cam surface 16 and a sleeve 17 is mounted to slide vertically on the spindle 1 and has a complemental cam surface 18 cooperating with the camsurface 16. This sleeve 17is yieldingly pressed verticallyupward'by'a helical spring 19 surrounding the spindle '1 and losated-between the sleeve 17 and an integral annular sleeve-like portion 20 oft'hebobbin rest 2.

It will thus be seen that the "action of the 'yieldingly and veraeauyupwardly-mo acted sleeve 17 in cooperation with the bobbinclutching members is to givea symmetrical radial outward movement of the bobbinclutching members.

This radial movement of the bobbinclutching members is limited by radially interengageable means on the spindle and on the said members near the upper ends of the latter. These means are shown as a collar 21 secured to the spindle and providedrwith a downwardly projecting annular 'fl'angev22 cooperating with a compl'emental vertically upwardly projecting annular-fiange 23 on the interior of the bobbin-clutching members. The interengagement radially vof the flanges 22 and 23 limits the radial movement of the bobbin-clutching members.

The action of the 'ineansgemployed for expanding the bobbin-clutching members, if not prevented, is such that it necessarily; has a strong tendency to elevate bodily the bobbin-clutching members and bring about a vertical engagement of the bobbin-clutching members and the flange of the collar 21. The result is that so much wear takes place between the collar 21 and the bobbin-clutching -members by reason of this vertical engagement that the flange 22 is worn off or cut into or the flange portion of'the bobbinclutchin' members is worn off or cutinto or both sufliciently to permit the lower ends of the bobbin-clutching members to come out of the'recess in the bobbin rest'thus permitting the bobbin-clutchingmembers to fall out of place. This action is, however, prevented by thisinvention in the construction already described because any vertical movement of the bobbin-cliitching members is'prevented' by the ring 15.

The construction, however, permits the necessary radial movement of the bobbinclutchin'g members because they may pivot freely about the ring 15.

The bobbin-clutching members are held in proper spaced relation about the spindle by suitable separator pins 2 1 vertically mounted in the bobbin rest.'

The construction thus provided is simple, efficient and readily manufactured and'assembled, the radially projecting grooved feet of "the bobbin-clutching members "are readily made by machine operations and the parts are readily assembled by simply snapping the'rin'g 15 into place. In addition if it is desired to remove any of the bobbinclu'tc'hing members for repair or replacemerit the ring 15 may be sprung out of its seat in the recess '11 thus permitting the bobbin-clutching members to be removed.

Having fully described my invention, what I'claim as new and desire to secure'by Letters Patent is:

1. The combination of a rotatable bobbin spindle'and'bobbin rest, a plurality of cen trifugally-acting, bobbin clutcliing members mounted upon and bodily rotatable therewith, radially interengageable means on said spindle and on said members to restrict the radial movement of said members, vertically acting means to effect in cooperation with said members the expansion thereof, and means carried by the bobbin rest engaging the lower ends of said members and acting to prevent said members from moving vertically and thereby prevent vertical engagement of said radially interengageable means and acting to permit the required radial movement of said members.

2. The combination of a rotatable bobbin spindle and bobbin rest, the said bobbin rest having a vertical recess therein concentric with aid spindle, ..a plurality of centrifugallyacting bobbin-clutching members mounted upon and bodily rotatable therewith and provided with radially projecting feet at their lower ends located in said recess, radially interengageable means on said spindle and on said members near the upper ends thereof to restrict the radial movement of said upper ends, means located between said spindle and said members and yieldingly actuated vertically to efiect in cooperation with said members the expansion thereof, and an expansible ring engaging the outer vertical wall of said recess and over lying said feet and acting to prevent said members from moving vertically thus to prevent vertical engagement of said radially intereng'ageable means and acting to permit the required radial movement of said members.

4. The combination of a rotatable bobbin I spindle and bobbin rest having a vertical recess therein concentric with said spindle, a plurality of centrifugally acting bobbinclutching' members mounted upon and bodily rotatable therewith and provided with radially projecting feet at their lower ends located in said recess, and an expansible ring engaging the outer vertical wall of said recess and overlying said feet.

5. The combination of elements as set forth in claim 4 in which the feet of the said bobbin-clutching members are provided with an annular groove on the upper surface thereof fitting beneath said ring.

6. The combination of elements as set forth in claim l in which the outer vertical wall of said recess is provided with an annular groove in which the said ring is seated.

7. The combination of elements as set forth in claim 4 in which the feet of said clutching members are provided with an annular groove on the upper surface thereof fitting beneath said ring and in which the outer vertical wall of said recess is provided with an annular groove in which the said ring is seated.

In testimony whereof, I have signed my name to this specification.

CHARLES E. NUTTING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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