US2172336A - Shuttle for thread cutting mechanism - Google Patents

Description

Sept. 5, 1939.

R6. TURNER SHUTTLE FOR'THREAD CUTTING MECHANISM Filed" March 23, 1959 Invenkor R'Knavd G. Turner fla W Attorney Patented Sept. 1939 SHUTTLE FOR THREAD CUTTING MECHANISM Richard G. l urner", Worcester, Mass, assignor to Crompton &'Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application March 23, 1939, Serial bio. 263,684

7- Claims.

This invention relates to improvements in shuttles adapted for use in weft replenishing looms and it is the general object of the inven tion to provide an improved cutting plate or anvil 5 on one of the walls of the shuttle.

In certain types of weft replenishing mechanisms the thread of the outgoing shuttle is cut adjacent to the shuttle eye so that the descending bobbin can unthread the eye. A form of.

- thread cutter for accomplishing this result which has proved satisfactory employs a plate carried by the front shuttle wall and so located that the weft from the shuttle eye extends across the plate and is therefore in position to be severed by a thread cutter which moves toward the plate or anvil on transferring beats of the loom.

In such a cutting mechanism it is important that the surface along which the cutting blade slides shall be flat, otherwise there may be spaces 2 between the 'cutter and the anvil which can be anvil held to the front wall of the shuttle by a superposed shell of a hardened material, such as fiber, through which is cut a window to expose,

the plate to the action of the thread cutter. By using this method of. securing the plate to the shuttle I obviate the need of rivets or screws and 3 can attach a plate with a smooth surface to the shuttle without danger of deforming its surface.

-When a shuttle is in constant use there is a tendency for lint, dirt, etc., to collect in any, small cavities or crevices in the shuttle, and lint 10 so collected is likely to be loosened and left in the shed to be beaten upand produce a mark in fine quality cloth. in order to reduce to a minimum the likelihood that lint may collect around the plate 1 form the window through the shell 5 with beveled edges which will shed lint and the like. It is a furtherobject of the invention to bury the edges of the plate under the shell so that the thread will not be out or abraded by being drawn 59 across the edges. I With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth. 55 In the accompanying drawing, wherein a convenient embodiment of my invention is set forth, Fig. 1 is a front elevation of a shuttle made according to my present invention,

Fig.2 is a horizontal section on line 2-2 of I 5 Fig. 3 is a vertical section on line 3-3 of Fig. 2,

and

Figs. 4 to 7 are diagrammatic figures showing a method by which myinvention can be produced. 10

Referring to the drawing, the shuttle S is provided with a threaded block E and a delivery eye D. The shuttle has a weft compartment W containing a bobbin B held by the customary springs It and rings 5 I. The weft thread T unwindsduri5 ing the weaving operation and issues forwardly from the delivery eye, extending to the right when the shuttle .is on the left handside of the loom, and toward the left when the shuttle is on the right side of the loom. As set forth herein gomy invention is for use when the shuttle is on the right hand side of the loom although I'do not wish thus to be limited.

The shuttle is adapted for cooperation with thread cutter designated generally at C the blade 25 of which will ordinarily be held in a non-cutting position, such for instance as in front of the lay when the latter is on front center. During a transferring beat of the loom the-cutter will be projected rearwardly toward the shuttle'by mech- 39 anism not shown herein but set forth for instance in prior patent to Payne No. 1,881,920. It is to be understood however that my present invention is not limited to use with the form of thread cutter shown specifically in the Payne patent. The cutter C is adapted for cooperation with a shuttle carried part which presents a hard sur-. face across which the weft extends and my present invention relates more particularly to the means for holding this part or plate on the 40 shuttle.

In order to describe my invention it will be convenient to set forth the successive steps in one method by which the shuttle vcan be made,

;but I do not wish to be limited to this method.

hard forward surface II which is smooth and fiat, and free from indentations or other surface irregularities.

After the plate 22 has been inserted into the pocket a shell of hard wear resisting material II, such as fiber, is glued to the front surface of the forward shuttle wall, as indicated in Fig. 6. Pibrous shells or coatings on shuttles are known and I do not claim this part of the shuttle construction. This fiber is of a substantial thickness ,but is sufficiently pliable to follow the contours of the shuttle. After the glue is set I cut a window II in the fiber shell II. This window is smaller than the plate 22 so that both the horizontal and vertical edges of the plate extend beyond the corresponding edges of the window 2!; This relationship is shown for instance in Figs. 2 and 7, and the overlapping of the plate by the fiber shell sufiices to hold the plate securely in position on the shuttle. The deliveryeye is also extended through the fibrous shell. I prefer to cut the window with beveled edges 30, seen in Fig. 7. The reason for beveling the edges of the wipdow is to facilitate the discharge of any lint or other foreign material which might otherwise collect in the edges of the window, but it is to be understood that certain features of my invention can be practiced without having the window edges beveled. f

After the window has been cut in the fiber shell the shuttle is ready foruse and the relation shown in Fig. 2 willexist during a transferring beat of the loom. At this time the cutter C is projected rearwardly against the, plate 22 and pinches the weft thread T against the plate,

severing the thread ata point adjacent to the' delivery eye D. The accompanying expulsion of the depleted bobbin from the shuttle will therefore unthread the shuttle eye.

While I have illustrated one particular method of shaping the shuttle body, the fiber shell, and the cutting plate, I do not wish necessarily to be limited to the specific method and structure described, inasmuch as it is sufficient if the cutting 46 plate has portions thereof located between the 50 thread during normal weaving.

From the foregoing it will be seen that 'I have provided a shuttle having a thread cutting plate so mounted that the edges thereof are buried under the fiber shell and cannot therefore come in contact with the weft to abrade or otherwise injure the thread during those passages of the shuttle when the weft is being drawn across the plate. It will also be seen that the edges of the window are beveled to avoid lint retention and also to facilitate the discharge of any lint which might otherwise find its: way into the window. Because of the way in which the plate is held in position it need be subjected to no manufacturing process which will interfere with that part of the surface which is exposed through the window to cooperate with the thread cutter.

Having thus described my invention it will be seen that changes and modifications may be made therein by those "skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

, 1. In a weft parting shuttle-having a delivery eye and cooperating with a' thread cutter, a shuttle body supporting the delivery eye, a shell of hardened fibrous material secured to the body, and a weft cutting plate at one side of the delivery eye to cooperate with the thread cutter and having portions thereof located between the shuttle body and the fibrous shell and having other parts exposed to cooperate with the thread cutter.

2. In a weft parting shuttle having a delivery -eye and cooperating with a thread cutter, a

shuttle body supporting the delivery eye, a shell of hardened fibrous material secured to the body and having a, window therein, and a metallic plate having parts located between the shuttle body and the shell and having other portions thereof accessible through the window to cooperate with the thread cutter. v 3. In a weft parting shuttle having a delivery eye and cooperating with a thread cutter, a shuttle body supporting thedelivery eye, a shell of hardened fibrous material secured to the body and having a window cut therein the edges of which are beveled, and a metallic plate having portions thereof located between the shuttle body and the through the window to the action of the thread cutter. i 4. In a weft parting shuttle having a delivery eye and cooperating with a thread cutter, a shuttle body having 'a pocket therein of given area, a shell of fibrous material secured to the body and having a window therein of an area less than that of the pocket, and a metallic plate substantially filling the pocket in the shuttle body and having portions thereof exposed through the window for cooperation with the thread cutter and having other portions projecting beyond the edges of the window to be held by the shell. I

5. In a weft parting shuttle having a delivery eye and cooperating with a thread cutter, a body member for the shuttle supporting the delivery eye, a shell member secured to the body member, a pocket formed in one of said members, a plate located in the pocket, and a window in the shell member exposing the part of the plate through said window to the action of the thread cutter, other parts of the plate projecting beyond the periphery ofthe window into said pocket and held by the shell. g

6. In a weft parting shuttle having a delivery eye and cooperating with a thread cutter, a shuttle body member supporting the delivery eye, a shell member of hardened fibrous material secured to the body member, a window extending through the shell member, and a plate to cooperate with the thread cutter having edges extending beyond the periphery of the window and located between the body and shell members and having a portion accessible to the thread cutter through the window.

7. In a weft parting shuttle having a delivery eye and cooperating with a thread cutter, a shell secured to the shuttle and having a window therein, and a plate larger than the window and projecting beyond the edges of thewindow to be held between the shell and the shuttle body.

' RICHARD G. TURNER.

"shell' and having other portions thereof exposed

Images