US1730020A - Yieldable thread holder for weft-replenishing looms - Google Patents

Description

Oct. 14, 1929."v R. G. TURNER YIELDABLE THREAD HOLDER FOR WEF REPLENISHING LOOKS Filed Dec. 2l, 1927 "lIllllllllllllllllllllllllllIllllIl'llllllllllllll l f fw im@ 6. 0 M

vso

' extend from the .reserve bobbins.

Patented Get. l, 1929 UnirJ a RICHARD G. TURNER,` or WORCESTER, MlissAcHUsETTs, Assrefnon To `oeoivir'roiv @e KNOWLES LOOMWORKS, OF WORCESTER,

MASSACHUSETTS MASSACHUSETTS, A CORPORATION 0I? YIELDABLE THREADV'HOLDER Fon wnrT-nEPLENrsHINGLooMs Appneatien med neeember 21,4927. serial ite/241,670;

AThis invention relates to .improvements in yieldablev thread lioldersfor Yweft replenishof the invention toprovi'dea thread holder ofthisftype which will yieldmore readily in one dircctionthan in another for purposes to beset forth. .W if f f. In ymy.,cti-pending.' application Ser. No.

A241,671YI have Iset forthy agthread holder including in its constructionaresilient element which is interposed between the threads eX- reservebobbins and a fixed yield at the, timefof transfer to prevent breakageof threads. It is .found .when a bobbin is being-moved byv the transferrermechanism into they shuttlegthat the thread `extending from. the bobbin` to the; thread holder. is placedjunder a temporary and sudden strain which occasionally results in breakage ofthe filling. The device set 'forth in said application also kassists in, clearing the shuttlebok of the trailing end jleftby the incoming lloobbin by whipping said endl away from the cloth and out ofthe shuttle box atthe timethe temple cutterpsevers thethread from theselvage. The presentinvention retains the advantages ofthe mechanism shown lin the aforesaid application kand in addition assists in the threading ofthe shuttle. c

The transfer of the bobbin occurs when the lay is initseXtreme forward position .but the 'shuttle is not ordinarily threadedv 'by` the transferring operation., After .transfer the lay moves backwardlyv approximately onehalf of its sweep before the shuttle is picked out of itsl boX and the new bobbin of course moves rearwardly with the lay under these conditions. Nith a thread holder which isr held in fixed position the threadis tightened during the backward stroke ofthe lay and may break. If the construction shown ,in

the aforesaid application weremadeweak enough to permit easy movementv of the thread holder rearwardly itwould not be stift enough to support all-the'ends which i It is accordingly an important object of my present invention to providel a resilientthread holder which will oder relatively high resistance to ing` mechanisms and it is -thevgeneral object e invention, A

4e: j ,ef Fig. i ehewingmr improved resilient vdirection of arrow 6, Fig. 1.

yield in a direction toward the magazine at the time of transfer but which will yield moreeasily in a rearward direction lso "that the saine may follow the thread of the incoming 'bobbin asthe lay moves from its foremost positionrbackto picking position; Y ,A ','It is a more particular object ofmy piresent invention to provide'a thread holder includ'ingl in its constructionk a flexible element Vformed of a rubber vtubealongone element of which is formedan integral rib, said tube being held `frictionallyv to a holder so-th'at the same maybe adjusted angularly. This is desirable inasmuch as it enables the weaver towvarytheresistancey offered in the two rdirections in which it is vneces-'sary `for the ,li-older to yield at the time/of bobbin transfer. With kthese and other-v objects in view which will appearv as the description proceeds, my invention resides in the combinationand arrangement of partshereinafter described and set forth in the claims. l v y In the accompanying drawings wherein I have shown'a convenient embodiment of my l isa front elevationof a multicolor weft replenishing mechanism havingy my invention applied thereto, parts of the lay being shown. l 5 ,t

- Fig. 2 is a horizontalsectiontaken on line Fig. 3 is adetail transverse vertical section taken on line 3-3 of Ifigyl, j

, Fig-,Ll is a diagonal section taken on line device in section,

`Fig. 5 is a vertical section von line v,5.--5 of Fig. 4e', and I l f,

.B`ig. 6 ris a top plan view takenl inthe that I have shown -a magazine, a shuttle and a1 lay more yor less diagrammatically toindicate the relative position these parts sustaintoward each other. rIhe lay 10 ispro-y` vided with a shuttle SA actuated by picker "Q Referring to th drawings, 1t will beseen Y'cutter 18.

ing wall 15 as shown in Fig. 3 and a horizontal upper shelf 16. A temple 17 may be of the usual form and is provided with a thread cutter 18 shown in Fig. 2.

The weft replenishing mechanism includes a maga-Zine 19 having inside and outside plates 2O and 21, respectively, which guide the Stack of bobbins 22. At the time of indication of weft exhaustion by weft detecting mechanism not shown the stack of bobbins will move downwardly an amount equal substantially kto the diameter of one of the bobbins and when theshuttle which has indicated substantial exhaustion'again arrives under the magazine 19 the lowermost bobbin fof 'the stack will be lowered totransfer position by mechanism not shown. Each bobbin has extending therefrom a thread 23 and lsaid threads move downwardly with the bobbins. lThe matter thus far describedis common construction in automaticl or weft replenishing multicolor looms and forms no part of my present invention, reference beking hadI to patent to Ryon No. 1,030,748 for the weft replenishing features and to No. 630,236 to Joy for the temple cutter.

My present invention relates more particularly to the Iform of the yielding part of a thread holder and by referring to Figs. 1 and it will be seen that-I have provided a tubular device 40 made preferably of india rubber and having a bore 41 therethrough. A thread holder43- formed of bent wire circular in cross-section is secured to the outside frame 21 of the weft replenishing mechanism by means of bolt 44 and has a diagonally extending shank 45 .lying in a vertical plane substantially parallel to the axis of the shuttle. The shank 45 is slightly larger than the bore 41 and is inserted into the latter, whereby the tubular portion 41 is held frictionally to the wire holder 43. A

ythread retainer 46 is inserted into the lower end of the tube 41 and is frictionally held in proper angula'rly adjusted position. The manner of connecting the tubular device with the shank 45 and the retainer 46 is set forth Clearly in Fig. 4. l l

, As previously stated it is desirable that lthe threadholder be free to move rearwardly under veryfslight pressure so that the same may follow the lay as the latter moves backwardly after a transferring beat of the loom. It is necessary,however, to keep the resilient ,element sufficiently stiff to hold the trailing ends 23 above the path ofthe lay and alsoy to give a sufliciently quick and decisive withdrawing movement to the end extending from the retainer 46 to the selvage when the thread is severed by the temple To accomplish these results I form integrally with the tube 4() a rib 50 which as shown inF ig. 1 lies in a vertical plane so thatit will add increased resistance to the movement of the tube 40 from the` full to the dotted line position shown in Fig. 1 but will add practically nothing to the resistance offered by said tube when it is moved rearwardly from the full to the dotted line position shown in Fig. 6. By adjusting the tube and the rib with respect to the shank 45 a variety of angular positions of said rib may be secured so'that the` tension desired by any particular user maybe obtained.

In operation at the time of transfer the tube 40 with its rib may bedeflected to the dotted line position shown in Fig. 1 to relieve any tension which might occur in the v trailing end 23 extending from the freshly transferred bobbin. Should the vsaid end lie behind the wall 1 5 and at arelatively large distance below the shelf 16 the tube will yield suficiently to prevent breakage. After transfer, as the lay moves rearwardly pre-` paratory to picking, the eye of the shuttle will not be threaded and it may be diflicult for the weft or lilling to be unwound 'from the 'freshly inserted bobbin and under these conditions the lflexible device will yield by moving from the full to the dotted line position shown in Fig. 6. It is to be observed 'that this latter movement 0f the tube is not resisted by the rib 5() as it is desirable to oii'er as `little resistance as possible to the rearward movement of the thread retainer. The conditions under which the shuttle is threaded will be improved if the end of the Vthread extending Afrom the freshly inserted bobbin and attached to the retainer 46 could `move rearwardly at the same rate as does the lay so that said retainer and shuttle would always' be in vertical alignment. The

easy yielding of the tube 40 permits this rearward movement or the` retainer and thereby improves threading conditions.v

From the foregoing it will be seen that I have provided an improvedffo'rm of yieldable thread holder having a yielding lelement weak enough to move toward the magazine under' the action of a sin le thread but 'sulii'ciently strong to lhold all o the threads'above the lay, and that said yielding element 'can be bent by the exertion of a very small force to move the retainer 46 rearwardly with the lay to assist in the threading of the shuttle.

Having thus described my invention it will be apparent that changesland modifications may be made therein by those skilled. in the art without departing from the vspirit and scope lof the invention and I do not wish to be limited to the ydetails lherein disclosed, but what I claim is v 1. ln athread holder for a weft replenishing loom having a supply of reserve bobbins `and an active shuttle, a thread retainer, a device formed of resilient material supported by the loom and affording supportyfor the retainer, the ends of the filling extending from the reserve bobbin being attached to' the thread retainer, and a rib formed on said re` silient device to increase the resistance thereof to deflection in one direction.

2. In a thread holder for a weft replenishing loom having a supply of reserve bobbins and an active shuttle, a thread retainer, a device formed of resilient material supported by the loom and affording support for the retainer, the ends of the iilling extending from the reserve bobbin being attached to the thread retainer, and a rib formed on said resilient device to increase the resistance thereof to deflection in one direction, said rib lying in a substantially vertical plane to cause the resilient device to offer more resistance to deiiection in the direction in which the shuttle is picked than is ofered thereby to movement in a rearward direction.

3. In a thread holder for a weft replenishing loom having a supply of reserve bobbins and an active shuttle, a thread retainer, a device formed of resilient material supported by the loom and affording support for the retainer, the ends of the filling extending from the reserve bobbin being attached to the thread retainer, and a rib formed on said resilient device to increase the resistance thereof to deflection in one direction, said resilient device being angularly adjustable relatively to the loom, whereby the location of the rib may be changed.

4. In a thread holder for a weft replenishing loom having a supply of reserve bobbins, a lay, and an active shuttle, a resilient device supported by the loom and having operatively connected thereto the threads which extend from the reserve bobbins, said device having a cross section unsymmetrical about the axis thereof to render said device more resistant to bending strains in a vertical plane than in a horizontal direction parallel to the motion of the lay.

5. In a thread holder for a weft replenishing loom having a supply of reserve bobbins, a lay, and an active shuttle, a resilient device supporting the ends extending from the reserve bobbins, said device having a cross section unsymmetrical about the axis thereof to render said device more resistant to bending strains in a vertical plane than in a horizontal direction parallel to the motion of the lay.

6. In a thread holder for a weft replenishing loom having a supply of reserve bobbins, a lay, and an active shuttle, a resilient device aifording support for the ends of filling extending from the reserve bobbins, said device having a cross sectional area unsymmetrical about the axis thereof to render said device more resistant to bending strains in a vertical plane than in a horizontal direction parallel to the motion of the lay, said device offering a relatively high resistance at the time of transfer of the reserve bobbin in the direction in which the shuttle is picked to prevent breakage of the thread, and oering a relatively low resistance to movement rearwardly as the shuttle moves backwardly after a transfer.

7 In a thread holder for a weft replenishing loom having a supply of reserve bobbins, a lay, and an active shuttle, a resilient device affording supportfor the ends of iilling extending from the reserve bobbins, said device having a cross sectional area unsymmetrical about the axis thereof to render said device more resistant to bending strains in a vertical plane thanin a horizontal direction parallel to the motion of the lay, said device offering a relatively high resistance at the time of transfer of the reserve bobbin in the direction in which the shuttle is picked to prevent breakage of the thread, and offering a relatively low resistance to movement rearwardly as the shuttle moves backwardly after a transfer, said resilient device being angularly adjustable relatively to the loom.

In testimony whereof I have hereunto affixed my signature.

RICHARD G. TURNER.

Images