US1772012A - Shuttle eye - Google Patents

Description

Aug. 5, 1930. D, O'HARA 1,772,012p

SHUTTLE EYE Filed peo. 50,' v1:1227

I NM EA z2 J\' y a? I shuttle and the fell of the shuttle stops abruptly at the end of its Patented Aug. 5, 1930 UNITED STATES PATIazlafry y OFFICE DANIEL oIIARA, or PHILADELPHIA, PENNsYLvaNIA, AssIGNoR To Ufs. BoDBIN &

.SHUTTLE COMPANY, OF PROVIDENCE, RHODEl ISLAND, A CORPORATION OF RHODE IsLAND SHUTTLE ,DYE

lAppncation med December so, 1927. seriai No.i masso.`

This' invention pertains" to weaving shuttles and more particularly to a shuttleeye 'of self-threading type. The self-threading or automatic type of shuttleis used very extensively in high speed automatic replenishing looms, and so vlong as soft yarns are used the usual form of eye is quitesatisfactory, but

when wiry yarns, for example'rayon, hardv twisted silk, or the like, are employed, diffi-v culty is frequently experienced from thetendency of the yarn to unthreaditself from the shuttle eye. This action is probably due to the factthat wiry yarns uncoil freely from the end of the bobbi'n, thus providing slack yarn within the shuttle body or between the the cloth, and when travel in either direction, the momentum of this slack wiry yarn is sometimes sufficient to throw theyarn out'of the'shuttle eye, thus leaving the shuttle unthreaded and usually causing` the yarn to break on the next pick.

Tn accordance with the present invention, provide ashuttle eye of self-threading type, comprising thread guiding elements and'other features usual to such shuttle eyes, but in addition having a guard device' whicheffectively prevents the yarnifrom unthreading itself from the shuttle'eye under the conditions above described, and-which isequally effective to prevent the thread from escapingeither in a forward or rearward direction from the eye.l This guard does not interfere in the least with the usual functions of the eye or with the threading operation; it does not add substantially lto the bulk of the shuttle eye or to its-weight, and is so simple that .the increase in cost of the'shuttle eye by reason of the provisionof this guard is substantially negligible..

In the accompanying drawings I have disclosed one preferred embodiment ofthe invention by way of example, together lwith-a slight modification thereof, but-wish it to be understood that the broad principle of the invention is not necessarily limited to the.

specific `embodiments here shown, and that its objects may doubtless be attained `by equivalent means fully within-the'spirit of the invention. .i I

In the drawings, v I

Fig; l is a plan view ofthe forward end of a weaving'shuttle provided with my improved self-threading eye; f p

Fig. 2, is a` fragmentary vertical -section substantially on the line 2-2 of Fig. 1; v

Fig. 3 is a side elevation of theshuttle eye,- I

removed from the shuttle body and'indicating the operation of my thread guard device when the shuttle stops at the end of its forward pick; l "f Fig. 4; isa vlew similar to Fig. 3 but show'-v Ing the action ofthe guard device when Ather shuttle stops at the end of its rearward pick;

Fig; 5 is a rear end elevation ofthe shuttle eye shown in Figsl to Il inclusive; and

Fig. 6 isa side elevation of a slightly modified form of shuttle eye. v Y

Referring to the drawings, the numerall designates'the body portionof a weaving shuttle of the usual type, such shuttle having the cavity 2 for the reception of the bobl bin 3. For convenience in discussion, the

end of the shuttle which contains the shuttle eye will hereinafter be referred'to as the for` ward end of the'shuttle, yand this end of the shuttle is furnished with the usual cavity 4: for the reception of the shuttle eye 5.

This shuttle eye comprises a base member 6 havingvthe longitudinally extending thread guiding channel yor passage 7,-9An upright longitudinally extending wall member 8, preferably integral-with the base 6, defines the right hand side of the'groove or rchannel 7. This sidewall 8 supports' a top member 9, preferably integral with the wall 8, which overhangs the channel 7; AAt 'a point preferoverhanging flange-like-top member `9 is provided with a depending guard member 10. -This guard member is preferably integral withl the top member 9 and extends dowfn-k wardly substantially parallel to the wall 8.

yThe member 10 is provided with aforwardly directedhorn 1l and a rearwardly directed 14: respectively .for engagementfwith' the yarn as hereinafter described. TheA extremi- -ably intermediate its front and rear ends this a' ties ofthe hornsy 11 and l2 are spaced from the outer edge of the base member 6 to provide a lateral entrance to the thread pas sage 7, and preferably the extremities of the horns 11 and 12 are disposed to the right, as viewed in F ig. 5, of the vertical plane of the extreme outer edge of the base,` 6 tofacilitate threading. For convenience in manufacture I prefer to make the guard member 10 of substantially fish-tail contour as illustrated in Figsr2, 3 and 4, providing anotch N in its lower edge. The provision of this notch facilitates the shaping of the horns 11 and 12.

The thread eye is furnished with other usual features, for example yarn guiding posts, spurs, and the like, all of which are well known in the art and which need no discussionvzherein. The thread eye is secured in. the cavity 4 in the forward part of the shuttle body in the usual manner. In threading the shuttle, the yarn Y is drawn for wardly lfromthemass M on the bobbin 3'- and intov the guiding groove 16 at the left hand side of the shuttle body.v The -yarn is now drawn forwardly into the notch 17 at the forward end of theshuttle bodyy and drops down along the side of the guard member 10A and through the entrance opening 15 into the thread guide channel 7. K The forward end of the yarn is then swung laterally beneath the spur 18 of the shuttle-eye and intothe transverse groove 19V ef the shuttle body, and thence into the lateral; delivery opening 20 of the shuttle.

At the termination of eachforward pick of the shuttle there is av tendency for the yarn Y to slip oft from` the end of the bobbin by reasonof its wiry character and its momentum, and this slack yarn tends to throw forwardly forming aloop 21 as shown 1n Fig.

` 23. Unless some means is provided to prevent it, this loop might easily escape through the entrance opening 15, and; upon the next rearward pick would be drawn out of the shuttle eye, leaving the shuttle unthreaded.

' In the same way, at the termination of the rearward pick, the uncoiling or ballooning of the yarn at the end of the bobbin provides slack which tends to fth-row itself out of the shuttle eye in the form of av loop 22. By the i provision of the guard. member 10, having the concave yarn engaging surfaces 13 and 14, the escape of the yarn loop either in a forward or rearward direction is prevented and the shuttle remains threaded until replenishment is necessary.

In Fig. 6 I have shown a sl'ightmodifica.-

tion in which the shuttle eye 5a is provided with a base member 6a and the 'top member 9a in the Vsame way as that above described. In this arrangementthe guard member 10"1 is provided with the concave front and rear surfaces above described, but its lower edge 23 is substantially straight and unprovided with a notch. This type of guard functionsv in substantially the same way as the guardy above described' and eectually prevents escape of the thread from the shuttle eye, but I prefer the form disclosed in Figs. 1 to 4 inclusive, since it has certain advantages from the manufacturing standpoint.

Vhi-le I have herein shown the gua-rd deviceas integral with the shuttle body and as located in a definite position with respect to the front and rear ends of the shuttle eye, I wish it to be understood that the invention is not thus limited, but that the'guard'device may be made as an independent element, for example of wire suitably bent and at tached to the body of the shuttle eye in any desired mani'ier; that the guard may be placed inother positions as experience may direct, and that chan-ges in proportions ef' be made without departingfromY parts may theI spirit of the invention.

I claim:v c 1. A self-threading shuttle' eye for weaving shuttles comprising a basehaving a' longitudinal thread-guiding channel therein, a

wall member at the inner side of said chan,

nel, a top member projecting from the upper part of said wall and overhanging the channel, and a guard depending from the outer edge of said top memben, the lower edge of said guard beingspaced from the base membertov provide a Vfreely openlateral entrance` adaptedto. permit a substantially straight run.v of yarn to move laterally into the thread guide; channel, the,` extreme front and rear edges of said guard being oppositiely vconcave for'preventi'ng; theyarn from throwingy itself out through saidl lateral: entrance in either a forwarder;rearward direction.v

2. AA seL-f-threadingshuttle eye for weavingf'shuttles comprising a base having alongitudinal threadsguiding channel therein, a

wall'fmernber-atA theinner side cfs-aid channel,

a top member projecting lfrom the upper part of saidwall and overhanging the channel, and a gua-rd `depending fromv4 the outer `edge' of said topmember, the lower-edge of said; guard being-spaced; from the base member toiprovide afreely open and substantially unobstructed lateralfentrance tothe thread guidev channel, said; guard having concave front and' rear faces arranged to face. away from each other and adapted to catch the yarn if thelatter isthrown rearwardly or forwardly respectively, by'V momentum, and thereby. to/ prevent the yarn fromy escaping through the lateral entranceto the yarn guide charr- Iie z 8. A self-threadingfshuttle eyev for weaving shuttles comprising'a baseha-vinga longitudinal thread-guiding channel therein, a

wall? member at theinnerside of said channel, a topmember projecting from the upper part of said wall andoverhang-ingv4 the chair nel", anda guard* depending from the outer edge 4of saidtop member, thelower edge of said guard being spaced from the 'base member to provide a freely open and substantially unobstructed lateral entrance to the thread guide channel, said guard being of fish-tail contour, having concave front and rear edges for preventing yarn from escaping through the lateral entrance.

4. A self-threading shuttle eye for Weaving shuttles comprising a base having a longitudinal thread-guiding channel therein and also having a side delivery eye and a threading slot leading from the side delivery eye to the longitudinal thread-guiding groove in the base, a wall member at the inner side of saidchannel, a top member projecting from the upper part of said wall and overhanging the channel, and a guard depending from the outer edge of said top member, the lower edge ofsaid guard being spaced Afrom the base member to provide a lateral entrance to the thread guide channel, said guard being provided with forwardly and rearwardly directed horns disposed rearwardly of the side delivery eye and in a plane inside of the outer edge of the yarn guide channel and extending away from each other.

5. A self-threading shuttle eye for weaving shuttles comprising a base having a longitudinal thread-guiding groove therein and also having a side delivery eye and a threading slot leading 'from the side delivery eye to the longitudinal thread-guiding groove in the base, an upstanding longitudinal wall integral with the base at one side of the guide groove, a top member integral with said wall overhanging the guide groove, a guard integral with said top member depending from the outer edge of the latter at a point between the front andrear ends and rearwardly of the side delivery eye, said guard having forwardly and rearwardly directed horns eX- tending away Jfrom eachother and spaced from the base and terminating at points within and adjacent to the outer side of the thread-guiding groove.

Signed by me at Providence, Rhode Island, this twenty-eighth day of December,

DANIEL OI-IARA.

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