US2828774A - Shuttle tips - Google Patents

Description

April 1, 1958 H. P. RUTHERFORD 2,828,774 I SHUTTLE TIPS Filed Dec. 7, 1955 2 Sheets-Sheet 1 ATTORNEY5 April 1, 1958 H. P. RUTHERFORD SHUTTLE TIPS 2 Sheets-Sheet 2 Filed Dec. 7. 1955 INVENTOR m1 A ewr P/Pz/r/mww EMWWM SHUTTLE TIPS Henry P. Rutherford, Homestead, Fla., assignor to Multi Corporation, Homestead, Fla., a corporation of Florida Application December 7, 1955, Serial No. 551,573

2 Claims. (Cl. 139-196) This invention relates to the construction of shuttles used in textile apparatus and is particularly directed to improvements in shuttle tips. The present application is a continuation-in-part of my copending application Serial No. 527,716, filed August 11, 1955, for Shuttle Tip Structure, and the structures to be described herein comprises improvements over and embodiments of the invention claimed in said copending application.

It is the object of the present invention to provide a novel shuttle tip construction and mode of attachment to a shuttle body.

A further object of the invention is to provide a novel shuttle tip construction and mode of assembly wherein the tip structure comprises a base by which it is attached to the end of the shuttle body and a harder tip fixed to the base.

It is a further object of the invention to provide a novel two-part shuttle tip structure comprising a base and a hard tip which are peripherally interlocked and present a surface continuous with the adjacent of the shuttle body.

A further object of the invention is to provide a novel shuttle tip connection to the end of a shuttle body wherein the body end is grooved to receive tightly one or more flanges on the tip structure for increasing resistance to side thrust and other lateral forces incident to picker stick action and bobbin changing.

A further object of the invention is to provide a novel two-part shuttle tip structure consisting essentially of a base and hardened tip peripherally locked together by deformation of a skirt on one of them and pins angularly related to the shuttle body axis fixed to the base and projecting into said shuttle body.

Further objects of the invention will appear as the description proceeds in connection with the appended claims and the annexed drawings wherein,

Figure 1 is an assembly view of an end of the shuttle according to a preferred embodiment of the invention;

Figure 2 is a separated view of the'two-part shuttle tip structure before attachment of the tip to the base;

Figure 3 is an end view of the shuttle body showing the grooves;

Figure 4 is a bottom view of the shuttle tip structure base showing the flanges that tit into the body grooves;

Figure 5 is a top view of the shuttle tip base of Figure 4;

Figure 6 is a bottom view of the tip before attachment;

Figure 7 is an assembly like Figure 1 of a difierent embodiment wherein the shuttle tip structure base is entirely surrounded by the skirt on the hardened tip in the assembly;

Figure 8 is a separated view of the base and tip of Figure 7 before attachment to each other;

Figure 9 is a bottom view of the tip of Figure 8;

Figure 10 is an assembly like Figure 1 of a further embodiment wherein the skirt is on the base of the shuttle tip structure;

2,828,774 Patented Apr. 1, 1958 ice Figure 11 is a sectional view through the base of Figure 10 before attachment to the tip; and

Figure 12 is a section through a shuttle tip structure base that may be used in the Figure 1 assembly but wherein some of the pins that attach the base to the shuttle body are located in different parts of the base and some are angled inwardly with respect to the axis.

The shuttle body 11 which is preferably of dense natural hard wood, laminated wood, or an equivalent hard or laminated plastic, or hard compressed fibrous material such as a compressed structure of cotton and glue, has a fiat transverse end face 12. This end face is formed with one or more, here two, shallow annular rectangular cross section grooves 13 and 14 that are concentric with an appreciably deeper piloting pin bore 15.

A series of bores 16 are provided in the shuttle body grouped about the longitudinal shuttle axis and each preferably diverging from face 12 a suitable angle to the shuttle axis, the illustrated angle being about 16 although any workable holding angle can be used within the invention. Four such bores are shown but any desired number may be used. The bores 15 and 16 are all cylindrical.

The shuttle tip structure consists of a metal base 19 and a metal tip 21. The base 19 has a flat bottom surface 22 to abut the shuttle body face 12 and two integral rectangular cross section depending axial flanges 23 and 24 adapted to fit into grooves 13 and 14 respectively. A central pilot pin 25 rigid with base 19 projects into bore 15. in assembly practice the circular grooves 13 and 14 are cut slightly undersize in width with respect to flanges 23 and 24 respectively so that, when the base 19 is forced onto the shuttle body end until surface 22 abuts face 12, the upstanding ribs 26 and 27 of the woodenbody are radially compressed. This tight engagementof the flanges and grooves resists side thrust forces as will appear. The outer perimeters of surfaces 22 and face 12 are coexten sive in the assembly. 7 I

The upper surface 28 of base 19 is preferably flat and circular and parallel to surface 22, and an undercut recess in the form of a shoulder having an inwardly inclined annular side face 29 and an intersecting annular flat face 31 is provided below surface 28. Between the outer circular peripheries of face 31 and surface 22 the body has an annular sloping peripheral surface 32 that as will appear in a smooth continuation of both the adjacent rounded smooth shuttle body surface 33 and the attached tip surface. The perimeter of surface 28 lies appreciably within that of shoulder face 31 for a purpose to appear.

A group of bores 34, here four in number, are drilled through base 19 from surface 28. These bores 34 are at the same angles and relative locations as the bores 16 of the shuttle body and are aligned with them in assembly. The upper ends of bores 34 are countersunk at 35.

After the base 19 has been pressed into the end of the shuttle body to seat the flanges in grooves 13 and 14, and the shuttle body and tip base bores are aligned, a plurality of attachment pins 36 are driven through bores 34 until their enlarged heads 37 locate in the countersinks 35 preferably below surface 28. These pins 36 may be smooth surfaced and snugly fit the bores 16 and 34 which may be of the same size, but an improved holding action is obtained if self threading drive screws are used as pins 36, with bores 34 slightly undersize with respect to the wing diameter of the screw spirals and bores 16 slightly undersize with respect to bores 34. As these drivescrew pins are driven home they rotate and thread themselves into the aligned bores. This rigidly secures the base of I the tip structure to the shuttle body. If desired other may be driven through the bores.

3 The tip 21 of the two-part tip structure has-a bottom central recess 38 having depth to flat bottom 39 about equal to the axial distance between surface 28 and shoulder face 31. A depending continuous peripheral skirt 41 from the otherwise solid tip has approximately the ing or spinning operation solidly filling the undercut shoulder so as to provide a positive and permanent solid interlock between the tip and the base. In the same'operation the outer peripheral surface 43 of the tip maintains its preformed generally conical shape and surfaces 32 and 43 in the final product are smooth continuations of shuttle body surface 33.

In practice this desirable result is obtained by having skirt 41 and base 19 of tough, strong but deformable metal, while the forward end of tip 21 must be hard where it is impacted by the picker stick. Thus all but theskirt 41 of preformed tip 21 is usually case hardened, and the peripheral surfaces of the skirt and base are rolled to smoothly conform to the tip end and the adjacent body so that a smooth neat continuous shuttle surface having no thread catching scams or projections is provided; The tip structure may be of any suitable metal such-as steel or aluminum-for example.

In actual tests this shuttle tip structure pulled out of a hard compressed plastic block only when the= block cracked and failed at a pull of about 2500 pounds, a very superior holding action.

The surfaces 32 and 43 are herein referred to and in the claims substantially conical and it will be understood that this is intended to include surfaces of revolution of curved as well as straight lines as shown.

Referring now to the shuttle tip structure of Figures 7-9, the shuttle body 11 is grooved in the end face 12 as in Figure 1, and the bottom of base 44 is provided with groove-fitting integral flanges 23 and 24 and pilot pin 25. Also the concave upper surface of base dd is entered by a group of angular countersunk bores correspondingto those at 34 of- Figures 1-6, and pierced by the same types of attachment pins as at 36 inFigur'esl-b:

In Figures -'7-9,-however, the tip has a. deeper recess 46 having a flatbottom surface 47 parallelto fiat rim surface 48 of depending-skirt49. .The flat bottomsurface 51 ofbase 44 which abuts face 12 is peripherally smaller than-surface 22 of Figure l, leaving in this embodiment an exposed annulus of wood face 12 to be abutted by skirt end face 48 in the assembly.-

The undercut recess 52 of base 44 is actually a continuous groove with a forwardly diverging bottom surface 53. The skirt 49 is formed with n continuous head 54 of excess metal which, when the tip 45 is axially.

brought together with the base 44 after thebase 44 has been-fixed to the shuttle body, and surface 48 is in abut ment with face 12, is displaced by a mechanical rolling;

or equivalent operation that deforms skirt: 49 to form an internal continuous rib 55 to solidly fill andinterlock:

with 'undercut groove: 52"while maintaining. the :outer peripheral surface 54' of the entire tip including the skirt 2 as a smooth substantially conicahcontinuan'cei of body surface 33. a

In this embodiment likewise the skirt and base are of tough deformable metaL-andthetip at leastat its pointed" end region is quite hard. 1 Referring now :to the embodiment of Figures 610 and t 11, the ;base.55 is formedcwithaa;flatbottom'surface 56 having dependingintegrabfianges 13 and. 14 and pilotpin 15. This base ,has a forwardly sloping substantially conical peripheral surface 50 and an upwardly extending skirt 57 shaped as in Figure 11 before assembly to include a continuous bead of excess metal and surrounding the upper fiat base surface 58 that is parallel to surface 56. In effect the annular (cylindrical) inner surface of the skirt 57 defines with surface 56 a recess into which, after the base 55 is secured to the shuttle body end as in the other embodiments, the solid tip 58 is placed for attachment.

iiere tip 53 is a case hardened solid member. The conical surface 59 of its lower end is recessed at 61, this being done for example by cutting a reduced cylindrical surface 62 on the tipwhi'ch also in effect forms a bottom radial flange 63. The bottom surface of tip 58 is fiat, and when it seats on base surface 56 the deformable skirt 57 may be rolled or otherwise mechanically worked to solidly fill recess 61 to permanently and positively interlock the tip and base together while maintaining surfaces 50 and 59 as smoothly conical and continuous with body surface 33 as in the other embodiments.

In the embodiment of Figure 12, the base 64 is interchangeable with that at 19 in Figure '1 and of the same general structure with the same undercut recess formed by surfaces 29 and .31, the depending flanges 23 and 24, pilot pin 25 and peripheral surface 32. This type of base however is used Withcertain types of shuttle bodies with internal bobbin spaces that will permit for example only two bores 34 entering from'surface 28. In this base there is provided two or more countersunk bores 65 circumof the shuttle body. It will be understood that the shuttlebody is found with bores aligned with all of bores 34 and 65 as in all embodiments. -Actually theattachment pins in all of theembodirnents may be inclined ineither direction with respect to the axis, the'important thing I being the angularity to resist straight out pull.

There has therefore been provided in the invention a novel permanently locked two-part shuttle structure which a in addition to the angularly disposed attachmentpins has an interlocked flange and groove connectionwith the end of the shuttle body to increase resistance to side thrust forces such as those incident to picker stick impact and bobbin replacement.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. T he present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which comeIwithin'the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimedand desired to be secured by United States Letters Patent is:

1. The process of making a textile shuttle which comprises attaching the base member of a two part metal shuttle tip structure fixedly to the end of a wooden or equivalent material shuttle body, andthen assembling a hard substantially conical metal shuttle tip member of the structure directly upon and to the base by a mechanical forming operation wherein the material of at least one member is deformably permanently interlocked with the other member and the surface of the tip structure is disposed and maintained as a smooth continuation of the shuttle body surface. I

2. The process defined in claim 1, wherein one member has a peripheral skirt of tough but deformable metal, and the other memberis'peripherally recessed opposite the skirt in the assembly, and the assembled members are subjected to a mechanical rolling operation wherein the 5 6 skirt material is deformed into solid interlock with the FOREIGN PATENTS recess 475,646 Germany Apr. 18, 1929 References Cited in the file of this patent 607584 Great Bmam Sept 1948 630,716 Great Britain Oct. 19, 1949 UNITED STATES PATENTS 2,205,025 Balfour June 18, 1940

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