US1651089A - Automatically threading shuttle for looms - Google Patents

Description

Nov. 29V, 1927. 1,651,089

J GlLEs y 14 TTORNEY Patented Nov. 29, 1927.

UNITED STATES 1,651,089 PATENT OFFICE.

JOHN W. GILES, OF GREEK, SOUTH CAROLINA, ASSIGNOR TO DRAPER CORLPORATION, OF HOPEIDALE, MASSACHUSETTS, A CORPORATION 0F MAINE.

AUTOMATICALLY THREAD'ING SHUTTLE FOR LOOMS.

Application led March 19, 1927. Serial No. 176,771.

'Ihis invention relates to loom Shuttles which are automatically threaded'during the 'loom operation when filling replenishment the Stimpson inventionhave been successful in practical operation, and even though the shuttle may become partially or wholly unthreaded on the occurrence of overthrow as the shuttle comes to rest in the replenish ing boX, it is immediately rethreaded on the next pickofthe shuttle. Owing to the fact that the threading block or thread passage olfers little or no retardation to the thread movement during weaving, it has been found desirable in weaving with certain kinds or characters of filling or thread to provide an appropriate form of thread ,tensioning means which will impart to the thread the desired tension as it is laid in the shed. l An important feature of the present invention therefore consists in providing an automatically threading shuttle forylooms lwith a thread tensioning devicepositioned transversely of A the longitudinally vvextending thread passage at a point adjacent the bobbin chamber, and to provide in the thread passage between such thread Ytensioning device and the side delivery eye a thread guide which may act to maintainer-proper control of the thread. In accordance with the general character of the invention, the thread guide may be formed as a scroll located in the thread passage between the tensioning device and side delivery eye. On the first piclr of the shuttle following replenishment, the thread swirls or balloons around the end of the lilling carrier lor bobbin in the bobbin chamber, and in the shuttle disclosed in the Stimpson patent, this swirling action of the lthread enableszthe scroll to take control and thereaf'L r guide the thread during the move .ment the shuttle' for the thread delivery' of one good' form thereof.

through the side delivery eye. In devising a propery tensioning device for the thread and yet permit its swirling action to place the thread in the control of the scroll, the present invention provides a coiled spring, between the convolutions of which the swirling action of the thread will tend to place the thread as the shuttle is picked, and con sequently to pass into control of the thread guiding device in the longitudinally eXtending thread passage. n

In accordance with another feature of the present invention, the coiled spring tensioning device is mounted at the entrance of the thre'ad passage with the top ofthel coils thereof slightly above a portion 'of the thread guiding device or scroll, with the result that when the thread has passed into control of the scroll, it will also be placed between the convolutions of the spring coil and there remain until the occurrence of an overthrow. v

`In accordance with another feature of the invention, the coiled springrtensioning device is supported in a saddle secured to the loom shuttle adjacent the entrance to the longitudinally extending thread passage and thread guiding means is employed for engaging the swirling thread and directing it to the coiled spring tensioning device.

The invention and novel features thereof .willbesd be made clear from the following description and the accompanying drawings In the drawings: y

ig. 1 is a plan view `of the` eye end of a shuttle of the automatically threading type, having y the present invention associated therewith; j l Fig. v2 is an enlarged cross-section on the Y' line 2-2l of Figli; y

Fig. Bis a perspective view oftheshuttle of 1Fig. 1, vcontaining the present invention; anc Fig. l is a perspective detail, showing the saddle and the spring coil tensioningr device being assembled.

The shuttle 1 is provided with the bobbin chamber l 2 and frontward of the bobbin chamber is the longitudinally Y extending thread passage 3 terminating in a bridge, laterally of which is the sidev delivery eye 4. In, the illustrated form of the invention Athe shuttle-,is provided with a t"" .in block tf,- im shawn in the present instance ,as of siiilristans Y will cause the thread to pass upwardly 'from the thread passage and the shuttle become either partially or wholly unthreaded.. On the next lpiclr of the shuttle, however, the shuttle will become rethreaded in a vmanner simi-lary to that described in more detail in theStimpson patent.

The thread tensioning device consists ot a springcoil 7 which entends transversely ot the thread passage adiacentthe bobbin chamber, so that the scroll is between the tensioning device and the side delivery eye and thus serves to guide the .thread through the tensioning device.

As indicated in the drawings, the spring coil tensioning` device 7 is supported by a 'saddle 8., one of the side .arms 9 of which is extended upwardly and `at its upper end is 4provided with a portion 1() having an opening 11 tor the reception-ot a screw or other securing device 12 tor holding. such side portions of the saddle in position adjacent the bobbin chamber.

The opposite side portion 13 of the saddle is similarlyvv rnended upwardly .and at its .upper end is bent or turned, as at 1+i, toY pronvide a downwardly extending spring tension .adjusting inen'iber 1 5. Thelower end portion ol' the spring tension adjusting member 15` vis provided withy an opening 16 and through said opening and holes 17 in the upwardly extending 'side members .of the saddle is passed the bolt13, one end of which maybe suitably threaded, as at 1.79, to receive aznut or other securing'means 20, and the biturcated endv portion 16 ot the spring adjusting member 15 stra'ddles the bolt and is guided thereby as it is bent more or less, as will hereinafter be described, to .properly s paoethe coils of the spring tensioning device in accordance with the size of the thread in use The shuttle woodis vrecessed or cut away at`21, best shown in Fig. 2, to receive the upwardly extending side member 1 3 and the Aspring tensioning member 15 and house these parts7 especially .at their upper portions, to

ebstructicm during its swirling` action as itv a misi-tienes indicated at c Fie. 2 and to.V

maintainltlie parts in ythis lassociated relation `the spring-tensioning member is .pro-

'yvided with an additional supporting device .to support the scroll relative to the supportimg sad lle. Such supporting device, as indicated in Figs. 2 and i, may vlbeconstituted iby a bent member 22, a simpleV form of which is shownas a wire having one ileg 23 extending vdownwardzly at the outer side of the upwardly extending side member 13 and its upper portion formed as a, loop,*afs .at 24,

trom which point the wire is `bent downwardly. M25, to constitute a thread guide leading to the spring coil tensioning member. .he downwardly extending threadguiding portion 25 engages one of the side coils or convolutions oi the spring tensioningl mem- Vber 'l' und passes through an opening26 in the adgustmg. member 15, and 1s then eX- l tended .laterally through an :opening in the upwardly extending side member 13 vot the saddle, as indicated 23, Fig. 2. lThe result is that the spring supporting member 22 acts not only tofhold the spring tensioning .mem-` ber 7 in ,its floating position at the entrance 'of the longitudinally extending thread passage, Vbut also asa thread guide to engage the swirling thread and direct it to a position upon or between the coils vof the spring tensioning device. i y

In using thread` of relatively large count or s i z e,j the convolutions of the spring -tensioning member should be farther apart Vwhen fusing thread oit liner .countor smaller size, in order to gage the properten- Vsion suitable to .tlie`-tl1rjead in use, To effect proper adjustment ot' the con'volutions ot the spring tensioning member, the downwardly extending portion 15' ot' the saddle may be bent in either' direction, one to elosethe lc onvolutions oif the rspring ytensioning' mem ber, and .the l,other to widen the espace between the coils. To readily etiiect this character of adjustment, the saddle may bemade vot appropriate material, such, lfor instance, as brass, composition, or other metal, so that yby the insertion ot an instrument from` the .bobbin' .chamber into the spacev between the side member 13- and the adjusting member bring the coils oit' the tensioning member into .closer relation when using tine count orsmall yarn, and similarly, when. a lyarn of .coarser count 0r letsel' thread 1semp10yed,the acl- 1 5.v these two parts may be separated to c be noted, as shown in Fig. 2, that when the thread is under control of the guiding devicer or scroll, it will be drawn from the bobbin chamber into a plane sufficiently low to cause the thread to remain between the coils of the spring tensioning memberand should an overthrow occur as the shuttle is brought to rest in the replenishing box, the thread a may pass upwardly -from the spring tensioning member and be cast upwardly out of the thread passage by the thread casting and guiding scroll.

It is believed this is the first instance in the artwhere a thread tensioning member constituted as a spring coil has been associated with an automatically threading shuttle for looms and positioned at the entra-nce to the longitudinally extending. thread passage adjacent thel bobbin chamber, so that the swirling action of the thread as it is withdrawn :trom the bobbin will cause the thread to automatically be engaged between the coils of thespring tensioning member,

and yet permit such thread on the occurrence ot' an overthrow to pass upwardly from the thread passage. It will also be apparent that the thread guiding device for directing the thread to the side delivery eye during weaving is mounted in the longitudinally extending thread ypassage between the coiled spring tensioning member and the side delivery eye, so that when once the shuttle is threaded, the thread guiding device will maintain the thread in its tensioning position between the coils of the spring tensioning member.

What is claimed is:

1. In an automatically threading shuttle for looms, the combination of the shuttle having a longitudinally extending thread passage provided with a bridge at its forward end and side delivery eye, a resilient tensioning member at the entrance of the thread passage adjacent the bobbin chamber, and a thread guiding device in the thread passage between the tensioning member andthe bridge at the forward end of the longitudinal thread passage to depress the thread into the tensioning memberpasthe thread is withdrawn from the shuttle on the first pick of the shuttle following replenishment.

2. In an automatically threading loom shuttle` the combination of the shuttle having a longitudinally extending thread passage, a resilient tensioning member at the entrance oit the longitudinally extending thread passage adjacentl the bobbin chamber,

and a thread casting and guiding device in the thread passage between the resilient tensioning member and the side delivery eye.

3. In' an automatically threading loom shuttle, the combination of the shuttle having a longitudinally extending thread passage, a resilient tensioning member at the `entrance of the llongitudinally extending threadpassage'adjacent the bobbin chamber, and a scroll device in the longitudinally extending thread passage between the resilient tensioning member and side delivery eye.

4. In an automatically threading Y loom shuttle, the combination of the shuttle vhaving a longitudinally extending thread passage, a resilient tensioning member at the lentrance vof the longitudinally extending thread passage adjacent lthe bobbinl chain-V ber, and a thread guiding scroll in the thread passage having a part thereof below the top of the tensioning device to causeythe thread to pass into control of the tensioning device as'tlie shuttle is threaded.

5. In an automatically threading shuttle torflooms, the combination ot the shuttle having al longitudinally extending thread passage and side delivery eye, a coiled spring tensioning device at the entrance to the thread passage adjacent thebobbin chamber, and a scroll in the thread-passage between the coiled spring tensioning device and side delivery eye.

6. In an automatically threading shuttle for looms, the combination of the shuttle having a longitudinally extending thread passage and side delivery eye,acoiled spring tensioning device at the entrance to the thread passage adjacent the bobbin chamber, and a thread casting and guiding scroll in the thread passage between the coiled spring tensioning device and side delivery eye.

7. In an'v automatically threading shuttle for looms, the combination of the shuttle having a longitudinally extending thread passage and side delivery eye, a coiled spring tensioning device at the entrance .to the `thread passage adjacent the bobbin chamber,

having a longitudinally extending threadv passage, acoiled spring thread tensioning member at the entrance to the thread passage adjacent the bobbin chamber, and a support for the coiledl spring tensioning member secured to the shuttle body to position the coiled spring for engagement by the thread as it is withdrawn from the bob-l bin chamber.Y j

9. A thread tensioning device for automatically threading shuttles for looms, enmlprisinga eoiled-spring bet-Ween' the convolu-== f tions otYwhichtheA (thread is fdrawn; a supf porting-saddle `fori l,the coiled spiring secured to' the :shuttle a'dgacent'they bobbin chamber 5- Vto position the coiled I springl to ieaus'e. thefun- Windingthre'ad itv is Withdrawn from the'A 1 bobbin towenter between the coils of theif spring, and vthread gnidingfmeans fordirect-y ing: the un-Winding lthread' at thewentrance ,to.the.thread'passage into engagement with the-coiled spring. l l

:-10;'i-.vthreadtensloningI device' for autominaticallyI tl-ireadino shuttles ifor looms, com-4 I. prising a coiled spring between the convolu`l= tionsoii\vh1ch the thread vis drawn, af'supj Aporting .saddle lor the `coiled spring securedl v.

fthe.coiledqspringfsaid supporti-ng saddle be-f @ing a portion lfor-a'djnsting the space be--v tWeenthe convolutions oit the coiled spring :iny accordance with the vsize 'of the thread.

L11. y.Afthread tensioning dev-icePfor auto-1 maticallythreading shuttles for looms, coinprisi ng a=eoiled spring. betfweenjfthe convolutions of :which r they thread iswdrawn, a fsup porting lsaddle 'or-` the -coiledyspiiing secured toy the:shuttley adjacent'the ibobbin 4'chamber toy position the' coiled spring to cause the :unwinding thread as itis `withdrawn from the bobbin to enter-betweenthe-fcoils-of the spring-and means fory supporting ythe coiled -springrelative to the-s-addleinposition to intersect thepath'fof the thread in thefthread passage `12; Anan-tomat-ically1 threading shuttle 'for loonisfhaving asidedelivery eyefand a threading block provided with a longitudinally extending tliread-"passage, a thread tensioningl member at'the entrance of-=tl1e thread passage achacentthe bobbinchamber,

Aand a thread .guide seemed in the longitudinally extending thread passagebetween vthe tenssonlnginember 'and theliront end 'of the f passage f and below the rtop oi' I the threading 'block to act` upon the `thread as it is'delivered -flrom'the shuttle 'andcause it'to-be *drawny through the thread--tensioning'member on .the lirst pick following :replenishment y In testimony whereof, I havel'slgned my name to this speciiieation.

:JoHN eines.

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