US1564910A - Automatically-threading shuttle - Google Patents

Description

Dec. 8,1925. 1.564.910

' W. l. STIMPSON HIlMINIMUMIllHummm f ATTORNEY tion, in 'connection with the accompanying' Patented Dec. `8, 1925.

UNITED STATE-s PATENT .o1-"FICE,

WALLACE I. sTIMP'soN, ornornpALn, MAssAcnpsnT'rs, AssrGNoRiTo'nRA-Pnn con- PoRATIoN, or HOPEDALE, MASSACHUSETTS, A coRroRATroN or MAINE`-` p,

AUTOMATICALLY-THREADING SHUTTLE. u

Application filed J'ulyl 10,v 1925. Y Serial No. 42,753.

To all whom t 'may concern.'

A Be it known that I, VALLACEI. STrMrsoN, a citizen of the UnitedStates, residing at Hopedale, in the county ofl lvorcester4 and VState of Massachusetts, have invented an Improvement in Automatically-Threading Shuttles, of which the following descripdrawings, is a specification, like characters on the drawings representing like parts.'

This invention relates to automatically threading loom shuttles which are replenished from time to time during the weaving operation.

It is now the usual practice to provide filling replenishing looms with a `hopper containing filling carriers or bobbins having` filling thread-wound thereon, the ends of -which aresecured to aV fixed point, and^ to employ in connection therewith shuttles having means which seek to take control of the thread or thread the shuttle as it is picked, and thereafter prevent unthreading. The first of these problems has r presented much difficulty and uncertainty due to the overhangs, guards, projections and the like, which have been employed to prevent subsequent unthreading.

l/Vhen the shuttle is picked followingreplenishing, the lay is back fromlthe position it occupied during replenishment, with the result that the overhangs, guards, and projections,y heretofore used and extending' from the sides of the thread passage, have interfered with the natural swirling movenient of the thread as it is withdrawn from the'shuttle and often prevented' the threading devices from securing control ofthe thread, which would consequently break onthe return pick of the shuttle. In attempts to overcome this difficulty, the wood of the shuttle has been grooved or cut away.

frontward of the threading block, and while such expedients have succeeded to r some extent in securing partialthreading passage'open at its top at both sides of thelongitudinal axis of the shuttle and offeringpno obstruction to thev natural swirling action of the Ythread at or adjacent to the` bobbin chamber', and as contributing to the preliminary threading of the shuttle as it is picked following `replenishment and the permanency of thread control, the shuttle wood is providedy with a thread leader 'of novel construction extending diagonally from the tip of the shuttle tothe thread passage.`

In accordance with the 'present invention,

the threading block'has a thread;'directory at the front of the open'thread passage which is provided with a thread catch cooperating with thefthre'ad leader to previ-antV unthreading `of the' shuttle 'by thel weft fork on the beat `up following replenish-l shuttle is inv the non-rement when the Yplenishirrg box.

The invention andpnovel features thereof willbest bel made clear from the followingV description and the accompanying drawings of one good form thereof.

In thedrawings: y l, Fig. l is a plan view of the threading end of a shuttle provided withthe present invention; H

Fig. f2v is a perspective view of some of the loom fparts and the shuttle, showing the relation thereof on the beat up folso f lowing replenishment and during theaction of the weft fork; l Fig.'3 is a plan view of a shuttle embodying the present invention, showing they shuttle asv being completely threaded;

Fig. -i is a frontend view of therthreading block showing the swirling action ofV the thread about either of two centersin the thread'p'assage;

Fig. 5 is an enlarged section on'the line Fig. 6 is an enlarged perspective view of the threading end of the shuttle showing the thread catch andthe lead ofthe thread therefrom when the shuttle is partially threaded. l Y y K Y The shuttle body. 1 is preferably formed of wood and contains the usual bobbin` chamber 2 open at the top and bottom for replenishing purposes, as usual. Within the bobbin chamber 2 is the filling carrier or bobbin 3, having the filling wound thereof the shuttle. '1 the threading on, and detachably held by the usual bobbin holding jaws (not shown) for filling replenishing purposes.

lFrontward of the vbobbin chamber 2n the shuttle is provided with a threading block receiving'chambere in which is secured the threading block 5 as by the usual crossbolt 6. Extending longitudinally of the threading block 5 is the thread passage 7 which, as shown, is open at its top and offers no obstruction tothe swirling action of the thread as it is withdrawnfrom the filling carrieror bobbin during the iiight rlihe side walls 8 and 9 of block extend upwardly Vfrom the base portion of the block at the sides of the block receiving chamber` si., at the side of the shuttle adjacent thev side delivery eye 10V the threading block is provided with a thread director 11,- the front end portion i 12 of which is extended laterally of the threading 'block receiving chamber Ll in a transverse direction relative tothe longitudinal axis of the shuttle. ,Y l

` The threading block 7 at the front is provided withawbridge 13, the center portion of which is depressedat 14 centrally of the Vshuttle or in the longitudinal axis thereof, and affords a gu-ide for the filling thread a from the bridge throughthe side delivery eye 10, as indicated in Fig. 3. Between thev front edge portion 15 of the thread director Vand the wood 16 of the shuttle, the usual passageway is provided for the threadon its course to the side deliveryveye during complete threading of the shuttle. n The shuttle body 1 is provided with a thread leader17 which extendsfroni a point 18 at one side nearthe tip' end.,r portion of the shuttle vin a diagonal direction 'to the point 19 where it joins the longitudinal thread passage. The thread'leader '17, has a rounded lower surface Q'Owhich extends between the points'r 18 and 19 and is preferably forned in a circular curve corresponding to the swirling action of the thread during its fiight following replenishment of filling. The side ofthe thread leader adjacent the side ldelivery eye is c'ar'rie'd upward in a rounded curve, as at 21, to guide the thread into the passageway leading t'o theside delivery eye, while the opposite wall 22' grad'- ually rises from the end portion 18 of the leader towards the end of the thread director in a surface curve corresponding to the path of the swirling thread a against'which the thread strikes and by which it is guided to the control of the thread directoigindicated in Fig. 5, as the shuttleis picked following replenishment of filling.

The surface curve ofthe wall 22 lof the thread leader is continued upwardly and over the end of the thread director as at 22X in the form of an overhang which, as will further appear, not only directs the swirling thread to insure preliminary threading, but once such preliminary threading is effected, a'ctsin conjunction with the thread catch, to be described, to prevent unthreading,

either by the vaction of thethread itself or i by the weft fork on the yfollowi'ngbeat up.

The end of the thread director is provided with a thread catch 23 which extends .downwardly from the end ofthe director in close proximity to the curved surface 22 of the thread leader and has its outersur'face 28X rounded in a downward curve close to the surface curve and corresponding with 22 of the thread leader. The thread catch 23 is undercut or provided with a guide 2li at the side adjacent the side Ydelivery eye into which the thread naturally swings as- Y the shuttle is picked followingjreplenishment, the relation of the thread catch andV the thread leader being such that oncethe' thread isengaged with the thread catch, it

Ain the present invention is diagonally arranged with relation to the longitudinal axis of the shuttle, such that the lead of the filling thread from the point of its attachment to the shuttle will naturally occupy the Ythread leader. As the shuttle is picked following replenishment, the thread will swirl or balloon from the filling-carrier in thel shuttle around the fixed point to which the' filling isy attached, and in such swirling movement, due to the direction of the thread leader, the swirling thread a will engage the surface of the thread leader and be by it directed downwardly into the bottom portion of the threadleader and on its lupward rise will naturally swing into engagement Vwith the thread catch 23, as indicated in v Once the thread has been 'caught by the thread catch during its flight after replenishment the swirling action of the thread, as it is unwound from the bobbin, as indicated by full lines in Fig. 1, will center about the thread ycatch 23, and inasmuch as there is no obstruction in the thread passage for such swirling Vaction, the thread is free to take its natural course. lVhen, however,

Fig. 5.

Vthe shuttle isV returned to the replenishing box, the thread will pass through the guideway along the edge of the thread director into the side delivery eye, as indicated in Fig. 3, and at 'such' time will bear upon the recessed portion of the `bridge 13 inthe threading block, with the result that the thread may now swirl or balloon as it is drawn from the bobbin about the bridge as a center, as indicated by dotted lines in Fig. l and by full lines in Fig. 3.

W'hen the partially threaded shuttle reaches the non-replenishing box and the lay beats up, the shuttle is partially threaded: that is, the thread a, is caught by the thread catch 23 and leads to the fixed point where all of the threads in the hopper are secured. As the lay 25 beats up, the filling fork 26 engages the thread, as indicated in Fig. 2, with the result that the thread a is pushed back andy upwardly from the thread leader, but owing to the rise and overhang of the thread leader above the downturned thread catch, no tendency is exerted for disturbing the engagement of the thread with the thread catch. This is due to two causes; first the character of the catch itself, and second, its relation to the walls of the thread leader which causes an abrupt rise in the thread from the thread catch over the top of the wall of the thread leader, as indicated in Fig. 2.

Since the longitudinally extending thread passage leading from the bobbin chamber offers no Vobstruction to the natural swirl of the thread when it is first picked following replenishment, such swirl extends substantially throughout the entire length of the thread to the point of attachment at the hopper, and the thread in its circular path engages the abrupt wall 22 of the thread leader and is directed by its natural swirl into engagement with the thread catch, as indicated at 25. lVhen once engaged with the'thread catch, the swirling action of the thread will take place about the thread catch as a center on the'irst pick of the shuttle following replenishment, and on the next excursion ofthe shuttle towards the replenishing box the thread a will be guided into the side delivery eye, as indicated in, Fig. 3, and at such time `the thread may swirl or balloon freelyin the thread passage about the bridge l13 Vas a center.

From the construction described it will be Vunderstood that the free natural swing Vor swirl of the thread linds no obstruction in the open thread passage as the shuttle is picked from the replenishing box after replenishment, and such natural swirl of thev thread insures the preliminary threading of the shuttle or the engagement of the thread by the thread catch due to the directing influence of the diagonally arranged and abrupt wall of the thread leader which extends in a direction substantially coincident with a line between the thread catch and the point of attachment of the threads,and the wall of the thread leader further insures that when the shuttle is partially threaded,

lthe action of the weft fork in pushing back the thread, causes it to remain in positive engagement with the thread catch as it rises over the top of the wall of the thread leader. l

During subsequent weaving when the shuttle is fully threaded, should a loop occur and be'thrown lto the 'side of the shuttle opposite the side delivery eye, the Wall of the thread leader will still maintain the` scribed, before it reaches the non-replenishing box, after which unthreading of the shuttle is prevented by the cooperating control of the thread leader and thread catch, even though the weight of the weft fork is such as to carry thethreadbackward during the following beat up. The absence of the usual guards and overhangs at thetop of thethread passage permits Vthe thread to swirl in its natural path without obstruction and through such thread movement insures shuttle threading which is not the case when the thread movement is'` obstructed; i Y

To control or limit the swirling action of the thread as its is withdrawn from the bobbin during weaving, it is sometimes desirable to provide means to confine the initia tion of. the swirl to a point 'adjacent the end ofv the bobbin,iand` inthe present instance such means is shown as a brush or bristles 27 secured to the shuttle and extending into engagement with or closely adjacent to the end portion of the bobbin, as indicated in Fig. 1. When suchmeans employed,A the swirling action of the thread commences at or adjacent the lti p end of the bobbin. f Y

lVhat is claimed is: y l

l. In an. automatically threading shuttle for looms, the combination of the shuttle body having a longitudinallyV extending thread passage and side delivery eye, a bridge over which the thread passes to the side deliveryy eye and constituting the ballooning center for the thread in the thread passage during weaving when the shuttle is completely threaded, a thread director frontward of the side delivery eye and having aA thread catch constituting the ballooningcenter for the thread 'during weaving when the shuttle is only partially threaded.

2. VIn an automatically threading loom shuttle, the combination of thev shuttle body having a thread director and a' longitudinally extending thread passage rearward thereof constructed and arranged to permit the natural swirling movement of the thread in the thread passage about a center trans- -versely adjacent the side delivery eye when .from the controly of th-edirector whenthe thread balloons about the end o'i the director las a center.

3. An automatically threading loom shuttle havinga .side delivery eye and a longitudinally extending thread passage construct- 4ed and arranged to permit the vthread yto swirl or balloon naturally .from the filling carrier to insure vshuttle threading as the shuttle is picked following replenishment,

and a thread director lfor `directing the thread to the side delivery eye'zas'the shut tle is yagain picked intheY opposite direction and provided with za .thread catch to retain control 4of the ithrea'd 'whenthe shuttle is partially threaded.

4;. In an automatically threading ll'oom shuttle, ra threading block provided with a longitudinal thread passage having a top opening'coextensive with the thread: passage to permit free unobstructed swirling movement of the thread, a thread director provided with a thread catch eiitending downfrom the end lof the director and yabout which as a center thethread may balloon when the shuttle'is picked Aandis partially unthreaded.V

v5. An'zautomatically threading'loom shuttle having aside delivery eye. provided with av tlrreadingfb'lock having a thread passage extendinglongitudinally of the 4shuttle and an ope-n top coextensilvein widthwith the thread passage 'to :permit-free swirling or ballooning movement of'thethread as the shuttle is picked following replenishment, a thread 'director orldirectingthethread to the side vdelivery-'eye on the vr'following pick and having a downwardly extending thread catch at its endV which prevents untl'ireading of the shuttle l'when once the thread is engaged' bythe catch.

6. An automatically threading loom shut- -tle having aside delivery eye, a threading block having a longitudinally extending thread passage anda wide open top for'the unobstructed entranceoi the-thread as'the shuttle 'is picked, athread directorhaving a thread catch, a thread leader-formed in the wood of the shuttle rontward of thevthreading block and provided with lan abruptwall over-Which the thread may be .delected'by the' weit fork to prevent Iunthreading.

7. An automatically threading loomshut tle having an lunobstructed thread passage inw'hich theVY thread may-swirl or balloon as is .again picked'.

'8. An automatically` threading loom. shut-- tle having-an unobstructed thread p assage in which the thread 'may yfswirl `or l,balloon l'as the shuttle Ais picked, 4a thread lleader formed in the wood of'theshuttlefand eX- tending diagonally vin substantially lthe-lead ci' the'thread asthe ishuttle ispicked following replenishment, the rear "wall ofthe leader rising abruptly,jand1 athrea'd 'director having 4a thread' catch to, engage the l thread as it is deflected by the abrupt wallldue' to the swirling movement of the Vthreaduasit lis withdrawn Vfrom'. the' shuttle.

9. rien-automatically threading.' loom` shuttle having-,af longitudinally extending thread passage provided with an open top substantially the width of the thread passageianfl offering. no obsntructiony tothe natural swirling movement: of the thread lasit i-s withdrawn rom'the shuttle,:an'd a thread director Ihavin'ga thread catch for .enga-gement vof the thread due to thread movement .as tfhe'sh'uttle is Ipicked following replenishment.

A10. An automatically threading loom shuttle having van open longitudinally -i'eX- tending thread passage oiierin'gno 4obstruction to the swirling movement of the thread `asthe shuttleisfpicked, a thread director having a Idownwardly extending thread catch, and aV thread leader formed inthe shuttle wood andv having 'a surfacec'urve in :conformation with the swirling `movementfof the'threadas it ispicked lollowing"rcplenishment and providediwit'h an overhang a'bovethe thread catch to prevent' unthreading yby the weitfork on the beatup following replenishment.

1l. An automatically threading shuttle having an openV thread passage 'oii'ere ingno obstruction to the swirlingy mo'ven'ient of the thread during iweaving, thread. leader termed in thefshuttle wood in the direction oiy the lead ol the thread following replenishment fand t provided with sa surface curved incon'torinity with they swirling path of ther thread which terminates adjacent the threadi ypassage' in an,-overhan-g,- and a thread director having l'a 'thread catch extending downwardly therefrom beneath the overhang and provided writh'its-onter surface curved4 inconformity` wfit'h the .curve of and adjacent to the t'rear wallfof vthe thread leader.

Intestirnony whereof, I'have signed my namento thisjspeciilication.

i 'WALLACE IJSTIMPSON.

' loom l

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