US1987820A - Shuttle eye block - Google Patents

Description

Jan. 15, 1935. A. GAvRlLuK 1,987,820

. SHUTTLE EYE BLOCK Filed March 15, 1932 /0 if 2/ l xl, 5de/7 Mv/M I mis' @5257.766 5:

Patented Jan. 15, 1935 y UNITED LSTATES PATENT OFFRE ,SHUTTLE EYE BLOCK I 'Alexiy Gavriluk, Lawrence, Mass. Application March 15, 1932, serial No. 598,929

i 2 Claims. `,(o1.`139-217 This invention pertains to weaving 'shuttles Wh-ich is strong, durable and in general reliable for use in weft replenishing looms, and'r'elates in action. more particularly to a self-threading eyefblock `In the accompanying drawing I have illusfor use in such a shuttle. i trated certain desirable embodiments of'the in- 5 During the iirst piek afterwreplenishingg'the Vention by way of example, and in the draw- 5 yarn is substantially straight and under tension, ing and if the guide passages of the shuttle eye Fig. 1 is a fragmentary plan View of a Weaving 'block are properly disposed, theyarn slips easily shuttle equipped with a shuttle block made in into place therein; but at the beginning ofA the accordance with the present invention; l

second pick the yarn comes slack and unless the Fig. 2 is a side elevation of the block of Fig. 10 block isproperly designed, the yarn may escape l, to larger scale, showing the block removed at the beginning of this pick so 'that the shuttle from the shuttle;

is unthreaded and the yarn is broken. v Further Fig. 3 is a rear view (that is, a View taken from mOIe, as'the yarn unWinds from the bobbinit the left-hand side oi Fig. 2) of the block shown l5 balloons, either to the right or the left, according in Fig. 2; l f l5 to the Wind, and ifkthe opening through which Fig. 4 is an elevation, to smaller scale, of the the yarn enters the yarn'passageis unobstructed, right-hand or forward end oi the block shown there is avtendency to unthread the shuttle due in Fg- 2 i to this ballooning action. Fig.` 5 is a bottom plan view of the block shown For satisfactory results in Weaving it is necesin Fig. 2; 20 sary to place some tension upon the unwinding Fig.. 6 is a Vertical section on the line 6 6 of yarn from the bob-bin, and in order to'obtain Fig. 2; this tension it has been customary Ato"provide f Fig.l 7 iS a COIHDOSDB VSW ShOWDg the Outer tensioning means Within vthe' Shuttle 'block faces of the tWo tension shoes removed from the adapted to exert a drag Von the moving yarn, Shuttle'block and arranged side by side; 25 In many cases the tension means provided, if at Fg- 8 S all edge elevlOIl Of OHG 0f the tenall effective for the intended purpose, is so de- SOD Shoes 0f Fg- 7; v vised as to make automatic threadingdifficult Fg- 9 iS i Teal' eleVaftOIl 0f 2' mOdfed fOTm 0f or uncertain, while most tension means require blOCkl and f adjustment when the shuttle is to be used' with 1mig-'l0 iS a Side eleVfiOD, t0 Small S0316, llllS- 30 yarns of diierent sizes or diameter, or if no ad- 'Hating 81 divide? plate fOTmIlg a part 0f the justment is provided for, achang'e-of shuttles is bOCk 0f Fig. 9. necessary when the yarn ischanged. Referring to the drawing, the numeral 1 desig- Among the objects ofmyfinvention is t0 pro- Dates a shuttle body of usual construction havvide a shuttle eye block for self-threading Shutins the tapering end portion 2 protected by the 35 mas having provision for so 'trapping the yarn metal tip 3. For convenience in description the as it enters the thread passages laaing to the end 2 of the shuttle is considered to be 'the for- Shuttle eye as to prevent its escabe either ward. end. .The shuttle body is 'provided with a through slackness or "through the ballooning of bobblt Cavlty 4 adapt@ to Twelve the bqbbmh the yarn as it comes from the bobbin. A further on Whlch the yam Y 1S would The Cavlty 4 1i 40 object is to provide a shuttle block having yarn mffded. Vutlha ortmdly lkrectqd tersmn 4 tension means so arranged that it doesnot subea' mg m O e emlon Canby 6 m b e Orward try of the yar? into thyairn passagffput which -of av thread guiding passage 7 leading to the 45 at the Same mme fumshes, the Tequslftenslon shuttle eye 8, the opposite Wall of this guiding Without adjustment .regardless 0f me kind 01" passage being provided by my improved shuttle .size of yarn employed. l i block 9, now to be described.

Another object is to provide a shuttle block This improved Shuttle block preferably comhaving tension n621115 designed fol" -eady 1"@- prises a body portion l0, here shown as of sub- 50 Placement, if, WOln, and having guiding means stantially rectangular contour, adapted to seat 0f Wear-resistant material @t H1055 -pallSr Where in a cavity of similar shape in the shuttle body, the Yam Changes its dreCOn- Other ObJ'CtS and preferably having a `downwardly directed are to provide a shuttle block of simple characlug 11 seating in a pocket in the floor of the tenter which is cheap to make and to install, vand sion cavityA so as accurately' to position the 55 4lation to the inner wall of the passage 12.

block. The block is furnished with a transverse opening 11a (Fig. 2) for the reception of a pin or bolt 11b (Fig. 1) extending through the shuttle body and securing the block in position.

The body portion of the shuttle block is furnished with a longitudinally extending yarn passage 12 (Figs. 1 and 3). The rear portion of this passage, that is to say, that part nearest the bobbin cavity 4, preferably is of substantially circular cross section as indicated in Fig. 3, and at its entrance end preferably is flared to provide a smooth guiding throat 13. At its left-hand side, as viewed in Fig. 3, the block has an upward extension 14 provided with an outwardly directed ear having a shoulder 15 adapted to seat upon a corresponding shoulder in the material of the shuttle body. The block 10 likewise has an upwardly extending portion 16 having an outwardh7 directed ear provided with the shoulder 17 also adapted to seat upon a shoulder in the shuttle body, these ears assisting in holding the block irinly in position and in preventing the block from rocking laterally. The upper surfaces 18 and. 19 of the parts 14 and 16 are smoothly polished and inclined downwardly and inwardly and merge into the threading slot 20. This threading slot extends downwardly into the block 10 and at its rear part is disposed in substantially tangential re- The inner Wall of the passage 12, at the rear part of the passage, forms a substantially unbroken circle except at the point 20X where a narrow slit is provided, preferably substantially in the horizontal plane of the center of the passage. This slit is formed between a substantially radial shoulder 22 and the tip of a horn-like member 21 defined by the converging surfaces 19 and the inner wall of the passage 12 above the slit 20x, such horn having a sharp edge spaced from the ledge 22 a distance not substantially greater than the diameter of the yarn.

The part 16 of the block is furnished with a forwardly extending horn 23 (Figs. 1 and 2), terminating at 24 at a point near the forward end of the tension cavity 6, the tip of the horn preferably being directed slightly to the left,

'while the right-hand edge of this horn 23 forms one wall of the thread guiding channel 7 as above noted. The horn 23 is provided with a downwardly tapering finger 25 (Figs. 2 and 4) Whose forward edge 26 inclines downwardly and rearwardly, while the lower end or tip of this finger 27 is deflected laterally toward the shuttle eye thereby providing a curved surface such as to insure a downward slippage of the yarn from off the tip of the finger when the shuttle is being threaded. The finger 25 constitutes yarn trapping means and the inner surface 28 of this finger cooperates with a wear-resistant post 29 secured in the body of the block to dene a lateral extension of the yarn passage 12.

Preferably the shuttle block is provided with a laterally disposed leg 30, forming an integral portion of the horn 23 and extending downwardly in substantially parallel relation to the adjacent outer surface of the block'lO. This leg 30 supports a second wear-resistant member 31 which isV so disposed that when the block is seated in the cavity in the shuttle, this wearresistant member 31 defines one side of the shuttle eye 8. The wear- resistant members 29 and 31 may be of any suitable character, for example, hardened steel, porcelain, or other desirable material and-being disposed at those points at which the yarn changes its direction, are adapted to guide the yarn without development of undue wear.

The longitudinal yarn passage 12 in the body of the block preferably is of substantially circular section at its delivery end as well as at its receiving end, as shown in Fig. 4 but at an intermediate point this. passage merges into a cavity 32 (Figs. 5 and 6), preferably of substantiallv rectangular cross section having the side walls 33 and 34 (Fig. 6). These walls are furnished with slots 35 and 36, and the cavity 32 is open at its bottom, as shown at 37. This cavity receives a pair of tension shoes 38 and 39 provided with outwardly directed flanges 40 and 41 respectively at their upper edges. These flanges are received in the slots 35 and 36 respectively which form guides for the upper parts of the tension shoes. The tension shoes are also preferably provided with flanges 42 and 43 at their front and rear edges respectively, all of the anges merging smoothly into the inner surfaces of the respective shoes so as to form smoothly convergent yarn receiving guide throats. The rear edges of these tension shoes are furnished with recesses 44 to admit the passage of the bolt 11b, and they are also furnished with openings 45 and 46 for the passage of guide pins 47 and 48, respectively, which are anchored at their opposite ends in the side walls 33 and 34 of the body of the block. The tension shoes are introduced through the open lower end of the block and the pins 47 and 48 are then put in place to hold the shoes in position. Interposed between the side walls 33 and 34 of the body of the block and the tension shoes 38 and 39 are coiled springs 49 and 50, such springs preferably embracing the rod 48. These springs are very light and delicate, and while urging the tension shoes toward each other, exert just sufficient force to apply the necessary tension without making it unduly difficult for the yarn to enter between the shoes. In practice it is found that this arrangement provides the requisite tension regardless of the r character of the yarn and throughout a long range of sizes.

It will be noted by inspection of Fig. 6 that the engaging faces of the tension shoes 38 and 39 when in contact are disposed directly bel neath a portion 20a of the threading slot 20, which is substantially straight and approximately in the vertical plane of the axis of the bobbin 5, and thus when the yarn is drawn from the bobbin during the first pick of the shuttle, the tensioned yarn drops directly down into the slot 20a and is thence drawn downwardly between the tension shoes 38 and 39, which spring apart under the tension of the yarn and allow the yarn to pass down through the tangential slot 20 and inwardly through the slit 2()x into the yarn passage.

On the return pick of the shuttle, the yarn, which has snapped beneath the point 24 of the horn 23 due to its original tension, is now guided with certainty along the passage 7,-at the same time sliding down the convexly curved surface of the finger 25 until it snaps behind the lower end 27 of this finger and into the transverse passage defined by the wear-resistant member 29 and the surface 28. The yarn now extends out through the shuttle eye 8 and is safely held against unthreading by the trapping finger 25 at the forward end of the block and by the horn 21 at the rear end of the block.

Since the passage 12 is of circular contour and substantially unbroken except for the narrow slit 20X, it makes little difference whether the yarn balloons in a left-hand direction or a right-hand direction, since ballooning yarn passes safely by the slit 20x with little tendency to pass laterally therethrough.

In Fig. 9 a modified construction is illustrated wherein the block 10a is substantially like the block 10 above described but wherein the entering end of the yarn passage 12a is divided into two parts by a separating plate 51 having an arrow-shaped upper part 51a. The oppositely inclined lateral upper surfaces of this portion 51a of the separator plate cooperate with the surfaces 18 and 19 respectively in guiding the entering yarn downwardly into the opposite side portions of the passage 12a. The part 51a is furnished with downwardly directed beaks 52 and 52a respectively, and the walls of the passage 12a are furnished with cooperating ledges 53 and 53a adapted to prevent yarn from escaping after once being lodged in either side of the passage 12a.

The plate 51 preferably is formed as an independent element, as shown in Fig. 10, and secured in the block body by a pin or bolt 54. This arrangement is particularly designed to overcome any tendency of the yarn, in ballooning either left-handed or right-handed from escaping from the shuttle block, one side of the passage l2a cooperating with yarn which balloons in one direction and the other side cooperating with yarn which balloons in the other direction. While this construction may be desirable in certain special circumstances, I prefer that which is illustrated in Fig. 3, which I find under most conditions is wholly capable of preventing ballooning yarn from escpaping regardless of the direction in which the yarn unwinds.

While I have herein illustrated certain desirable embodiments of the invention by way of example, I wish it to be understood that the invention is not necessarily limited thereto but that various changes in size, shape and proportion of parts as well as the substitution of materials may be made without departing from the invention.

I claim:

1. A self-threading shuttle eye block for use in weaving shuttles, said block being adapted to seat in a chamber in the shuttle body and having a longitudinal passage for yarn leading from the bobbin, the receiving end of said passage in the block being substantially circular and iiaring to provide a smooth entrance throat, the inner surface of the receiving end of said passage having a smooth wall substantially unbroken except for a longitudinally extending narrow entrance slit disposed at one side of the vertical plane of the axis of the passage, said slit having a bottom wall forming a shoulder, the block having a longitudinally extending downwardly convergent threading slot terminating at said shoulder, the inner wall of the circular passage at its receiving end and one wall of the threading slot converging above said shoulder to form a downwardly directed horn tapering substantially to a sharp edge spaced above said shoulder a distancev just suflicient to permit yarn to pass between it and the shoulder in entering the circular yarn passage, said horn being operative to prevent escape of yarn upwardly from the passage regardless of the direction in which the unwinding yarn may balloon, and yarn tensioning means so disposed within the block as to engage the yarn on its way through the longitudinal yarn passage at a point between the circular receiving end of said passage and the delivery end of the latter.

2. A self -threading shuttle block for a Weaving shuttle having a yarn delivery eye, said block having a longitudinally extending yarn passage which is of substantially circular contour in Vertical section at its receiving and delivery ends, respectively, but which merges into a substantially rectangular tension chamber at a point intermediate the ends of the block, the block having laterially spaced, smoothly finished upper surfaces which converge downwardly into a threading slot leading to the yarn passage, yarn trapping means associated with each end of the yarn passage, and tension means disposed within the rectangular tension chamber, the tension means comprising a pair of substantially vertical resiliently cushioned members having opposed surfaces designed irictionally to engage a yarn extending from the entrance to the delivery end of the passage, said members having outwardly directed iianges at their upper, front and rear edges, respectively, to furnish smooth entrances into the space between said members, said space being in the vertical plane of the threading slot whereby yarn entering through said slot slips readily into said space between the tension members, the yarn trapping means at the entrance end of the passage comprising a shoulder at one side of the passage, and a horn depending from the roof of the passage and having a sharp tip spaced above said shoulder to permit entry of yarn between the tip and shoulder, the thread trapping means horn depending from the roof of the passage comprising a downwardly and rearwardly directed horn having a rear edge disposed forwardly of a line extending transversely through. the shuttle eye, the lower end of said latter horn being deflected toward that side of the shuttle which has the shuttle eye, thereby to insure escape of the yarn from said horn during threading.

ALEXIY GAVRILUK.

CERTIFICATE. 0i? CORRECTQNe Patent No. 24,987,820. January 15, 1935;

ALEXEY GAVRILUK.

It is hereby certi'iei thai error appears in the printed speeiieaion 0i me above numbered paieni requiring correction as foilows: Page 3, secsn column, line 52, claim 2, strike out he Words "horn depending from iie resi" and insert instead assseeted wiii the delivery and; and tim the said Letters Patent simul be remi wiiii this correcties therein that he same may conform to the reesrd of the esse in this Parent fee.

Signed and sealed his 5th day of March, A. D. i935.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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