US2607371A - Yarn guiding block for weaving shuttles - Google Patents

Description

Aug. 19, 1952 5, 600 2,607,371

YARN GUIDING BLOCK FOR WEAVING SHUTTLES Filed April 26, 1950 /1151 1 E mv vrokf A%%/3 $3.01 Wooa 60 4? j 1 v" Z 34% IE9 Z ATTORNE v Patented Aug. 19, 1952 UNITED sTA-T scorer-1 1,") .1'

This invention relates to a weaving shuttle of the self-threading type and more particularly to a' yarn guide block disposed inthe shuttle between the chamber which receives the bobbin and the tip of the shuttle, which giude block serves to thread and guide the yarn into the delivery eye of the shuttle.

In order to attain perfect weaving, it is necessary to provide a reliable and effective thread guiding means particularly when weaving wiry and hard-twisted yarns, since such yarns exhibit a tendency to kink adjacent to the delivery eye of the shuttle and in so kinking to twist and writhe in such a Way as to escap from the shuttle eye with resultant mispicks or breakage of the filling. Likewise it is necessary to provide some effective means for automatically threading the delivery eye which will be effective upon the transfer of the filling into the shuttle.

It is also necessary to provide some means of securing a uniform yarn tension as the=yarn is drawn through the delivery eye. Such yarn tension has heretofore been provided by tension-pads which are resiliently urged toward each other to engagethe yarnfrom either side; If these pads are replaced in the block, they are positioned through a hole in the bottom of the block as the forward guide pin for the yarn is removed with great difficulty.

One of the objects of this invention is to provide a construction which may be more easily and inexpensively manufactured than the structure shown in my prior Patent 2,470,064 dated May 10, 1949. I

Another object of thisinvention is to provide a stationary yarn guide by reason of theshap- ,ingof the overhang of the block'which will effectively hold down the filling should there be a n Figure 6 tendency for the filling to lift up as the yarn is V drawn from the bobbin through the delivery eye. *Another object of this invention is to provide a structure which may be formed for either rightor left-hand bobbins from the same parts and by a different assembly of the parts.

Another object of this invention is to provide an arrangement for easier replacement of the friction pads in the block than has heretofore been provided.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1 is a fragmental top shuttle embodying the yarn guiding block plan view of a which '=,Figure S is aside block with the shuttle omitted;

q H central sectional view on'line T ill-offsFig ure 2 through a fragmental portion of the shuttle and the threading block";

Figure dis a section of'the threading block with the tunnel guide omitted and showing'one of the friction pads as being inserted the shuttl ey "v is a perspective view of the-threading block and the bobbin in their relative relation; Figure '7 is a perspective view of the tunnel guide member; 7 Figure 8' is a section on line 8-8 ofFigiire 3 of a modified form with the tunnel guide positioned on the opposite side of the block;

Figure 9 is a sectional view through the tension pads; p

Figure 10 is a section on line lll-l0 of Figure 3; and 1 4 Figure l1-is a section onlihe-H-ll of FigureBL In proceeding with this invention I have' simplified the manufacturing of the structure shown in my above-mentioned patent. The cast block i tead of having the thread guide as formed integral asone piece with'the block, it is formed with "a central-opening at the chamber end of the block with recesses in both side walls of this opening into which a separate member maybe inserted, which member forms the thread guid ing portion or tunnel through which the thread extends, and by having these recesses on "both sides of the walls of the opening, the =member maybe inserted in one or the other recess, depending upon whether it is desired that the threading block accommodate a right-hand wound or left-hand wound bobbin. Further, by making one of the'yarn guiding pins forward of the tension pads removable, I may remove.

and insert the threading pads throughtheslot atthe upper edge of the block and swing them into position rather than removing old pads and inserting new pads through the bottom wall of the block. Further,'I have grooved the under side of an overhanging portion of the shuttle block tohold the thread against a tendency to unthread. v

With reference to the drawings, ll] designates generally a weaving shuttle of the type commonly used in automatic looms and provided at its end with the usual metal tip II. The body drica1 guiding tunnel 34 and be the block.

12 of this shuttle has an elongated chamber I3 for the reception of a bobbin l4 having yarn l5 packaged thereon. At the forward end the chamber l3 communicates with a recess H5 or pocket for the reception of a yarn guiding block designated generally I! and shown in perspective in Figure 6..

This guiding block I! is usually of cast metal providing aahorn l8 and a guard l9 at one end. Below the'horn there are two hardened posts about which the yarn leads as it extends through the delivery eye 22 of the shuttle. The body of the block I1 is more closed in and solid than is usually found to provide thicker walls and there extends lengthwise through this closed-in solid portion a lengthwise extending opening designated 23 and spaced from the top, bottom, and opposite sides. The side walls of this opening 23 are provided with recesses 24 in the wall 25 on one side and 26 in the wall 2''! on the other side, which recesses extend through the Walls to the outer surface. A member 28 of J-shaped cross section (see Figure '7) having a shank 29 and a hook-shaped portion 30 may have its shank 29 inserted in either of these recesses 24 or 26, depending upon whether the bobbin package I5 is wound right-hand or left-hand. The hook portion 33 will be supported in a dependent relation; when the shankis inserted in the recess as described, leaving its edge 3| spaced from the wall which supports it and also leaving a space 3| between its convex surface and the opposite wall .so that a thread may enter throughthe slot 33 at the top which extends longitudinally of the block and pass around the convex surface 32 and past the edge 3| into the generally cylinguided through This slot 33 extends longitudinally throughout ,the length of the block and is widened out somewhat although less than usual into a chamber 35 in which the friction pads designated generally 36 are located. The slot also communicates with ,a laterally extending opening through the block 31 through which the thread will pass to be guided about the post 20.

The opposite walls 40 and 4| of thelchamber 35 are provided with recesses 42 and'43' for the 'reception of the ofiset portions 44 of the friction pads 36.- Thes pads are usually replaced through an opening in the bottom wall -l5 'of the block as ..the yarn guide pins 45 and 4? usually prevent removal, making necessary verticalflpa ssing of vthe'pads between the pair of pins. Here, how- :ever, the pindesignated 41 and shown in Figure 10 is removable, and the slot 35 is of a dimension .to permit thepads to be passed therethrough and each pad has its offset portion 44 insertedinthe opening either 42 or 43, as shown in Figure 5,

and then swung down through the slot or space 35 into position .by swinging movement and there after the pin 4! 'is {passed through a suitable opening in the wall 40 and threaded intoa threaded recess 41' in the wall 4.! so as to prevent the pa'dsfrom swinging forwardly; thus, the pads are retained :between the yarn guide pins 46 and 41. in a vertical position depending from the openings 42 and 43. These pads are tensioned in a 54 passes.

gagement as at 50 with the walls so that by utilizing an hexagonal socket 5!. these cups may be screwed into position to adjust th tension of the pads. A pin 52 passes through the pads to also anchor them in position.

In-order to lock the threading'b-lock 11 into the shuttle l2, there is an opening 53 extending laterally through the block, through which a pin This pin has a head 55 setting into a recess 56 in one side of the shuttle and is threaded as at 51 to engage a nut 58 in a recess 59 in the other side of the shuttle. The pin is at a location above the edge 3| of the J-shaped member so that the thread cannot drop over the edge when once threaded into the tunnel; thus, this pin 54 in addition to holding the block in the shuttle also serves as a means to prevent unthreading.

The horn [8 which usually-has a smooth undersurface is notched as at 53 sothat shouldthe thread tend to-slide along this smooth undersurface it will be caught inthe notch 60 on theunder surface of the horn l8 and assist in preventing unthreading should an unwieldy threadget into this position. t 1 Iolaim: 30 I theend of the bobbin chamber and the tip of the shuttle, said block having a longitudinal yarn A shuttle guide block to be disposed between entrance slot extending throughout the length of the block from its top surface downwardly, and having an opening extending into the block from the chamber end thereof and communicating with said slot, both of the side walls along said opening being recessed and a member generally J-shaped in cross section having its end selectively positioned in one recess and supported thereby forthe accommodation of either rightor leit hand wound bobbins with its hook portion downwardly suspended in said opening to provide "a longitudinal thread guide through and within -the hook portion with-a threa n pas- 1 sage thereto from the slot through the opening and about the edg of the hook portion.

SETH WOOD. REFERENCES CITED-.1. L

l "The following references are of recor'd in the .fil'eiof. this patent;

UNITED" STATES PATErrrs;

' 6 Date -Number I Nanie 1,631,090 D'avis' May 31, 1927 1,684,780 Ricard -Q Sept. 18,-1928 2,002,131 Spencer May 21, 1935 --2,087,60'7' Park July 20, 1937 I 2,281,972 i Golf :May 5, 1942 2350,30? Allen May 30, 1944 2,407,162 Kaufmann Sept; ,3, 1946 2,573,666 Kaufmann Oct. 30, 1951 I FOREIGN PATENTS Number 7 Country Date France Oct. 23, 1923

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