US1031977A - Heddle for leno-weaving machines. - Google Patents

Description

W. P. WOOD.

HEDDLB FOR LENO WEAVING MACHINES.

APPLICATION FILED APILZB, 1911.

1,631,971 Patented July 9, 19.12.

COLUMBIA PLANOGRAPH co., WASHINGTON, D c.

UNTTED gTATES PATFihT @FFTCE.

WILLIAM 2. W001), or rawruoxnr, RHODE ISLAND, ASSIGNOR To JENGKES SPINNING COMPANY, or PA'WTUOKET, RHODE ISLAND, A CORPORATION or RHODE ISLAND.

HEDIDLE FOB, LENO-VVEAVING MACHINES.

Specification of Letters Patent.

Patented July 9, 1912.

T 0 all whom it may concern:

Be it known that I, WViLLIAM P. Woon, a citizen of the United States, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful improvements in Heddies for Lenolveaving Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to doup heddles such as are adapted for use in weaving gauze or leno fabrics. Heddles of this type as heretofore constructed have usually been provided with doup loops formed of twine or similar flexible material which are rapidly worn, so that frequent repair or renewal of the doups is required with a resulting increase in the cost of manufacture. Attempts have been made to substitute wire for the doup cords or threads, but such wire doups have not proved satisfactory, owing princioally to the increased wear upon the warp iihreads due to the construction of the wire doup. or to the fact that the warp threads, which were not connected with the doup harness, were liable to catch on the ends of the wire doups during the forming of the sheds. and thus interfere with the proper operation of the harness.

It is the object of the present invention to provide a novel and improved construction of doup heddle which will enable the doup loops to be formed of wire or any other desired material without danger of producing undue wear upon the warp threads, or of interfering with the proper forming of the sheds.

To this end the invention consists in the features of construction and combination of parts hereinafter described and referred to in the claim.

The invention will be readily understood from an inspection of the accompanying drawings, and the following detailed description of the heddle illustrated therein.

In the drawings Figures 1 and 2 are diagrammatic views illustrating the mode of operation of a heddle embodying the inven tion in weaving leno or gauze fabric, Fig. 3 is a side elevation of a heddle embodying the invention in its preferred form, Fig. 4 is an edge view of the heddle shown in Fig.

3, 5 is a view similar to Fig. 3 showing the doup loop in a different position, and Fig. (i is an edge view of the heddle with the parts in the position shown in Fig.

As shown in the drawings the heddle consists of a thin metal strip 1 and a doup loop 2 which is preferably formed of comparatively thin wire. The doup loop is bent at its upper end to form an eye 3 through which the doup warp thread T passes, and to form two legs i which pass through holes or slits 5 formed in the heddle strip 1.

In general, the mode of operation of the heddle in weaving leno fabric is the same as the usual form of heddle in which the doup, loop is formed of twine or cord. As shown in Figs. 1 and 2 the doup warp thread T passes through a heddle 6 and then through the eye 3 of the doup loop from which it leads to the fabric. The warp thread T, which is not operated by the doup, and which for convenience may be called the ground warp, passes through a heddle 7 and thence to the fabric. As shown in these views, the heddles 6 are secured in frames 8 forming a part of the usual harness. The heddle 7 is mounted in a similar frame 9, the heddle strips 1 of the doup heddles are mounted in a frame 10, and the lower ends of the doup wires are secured in a frame 11. In forming a leno shed the frames 8 and 11 move down to carry the thread T below the thread T, the legs of the wire doup 9. drawing down through the holes 5 from the position indicated in Figs. 3 and 4 to the position indicated in Figs. 5 and 6. The frames 10 and 11 then move up into the position indicated in Fig. 2, carrying the thread T up on the opposite side of the thread T, and thus carrying the thread T about the thread T to twist the warp threads between successive picks. In weaving plain fabric the heddles for the warp thread T and the heddles for the warp thread T move alternately up and down in the usual manner.

In order that the thread T may pass freely over the eye 3 of the doup loop as it travels up and down the side of the doup heddle, the heddle is provided with means for guiding the warp thread over the end of the loop, and thus preventing such engagement of the main thread with the end of the loop as would interfere with the proper movement of the warp threads. In the construction shown, provision is made for thus guiding the warp thread over the end of the doup loop by forming a recess 12 in the side of the heddle strip 1 within which the end of the doup wire is pocketed and protected from engagement with the warp thread T while this warp thread is passing over the end of the loop. The recess 12 preferably extends for some distance above the holes or slits 5, so that the end of the doup loop will be effectively prevented from engagement with the warp thread passing over it, even if the end of the doup loop projects somewhat through the heddle strip. In this construction the face of the strip 1 on opposite sides of the recess 12 forms guides 13 for guiding the Warp thread over the end of the doup loop, and preventing its passing between the end of the loop and the heddle strip. With this construction the doup loops 3 may be formed of metallic wires so that they do not wear rapidly, and may also be so constructed that the warp threads will pass readily through them without being subjected to wear or abrasion.

lVhile itis preferred to form the guides for directing the warp threads over the ends of the doup loops by forming recesses in the faces of the heddle strips, it will be understood that this form of heddle and this manner of forming the guides is not essential to the broader features of the invention, and that the form of the heddle proper, and of the doup loop and of the guides, may be varied and modified without departing from the invention. While the heddles have been shown in Figs. 1 and 2 connected in a harness frame so that all the heddles move in unison, it will be understood that the heddles may be used with a jacquard harness, and may be so connected that each heddle is capable of independent movement in a manner which will be obvious to those skilled in the art.

Having explained the nature and object of the invention, and specifically described one construction of heddle in which it may be embodied, what I claim is A heddle for leno weaving comprising a thin sheet metal strip provided with short slits 5 for the legs of a doup wire and bent between and above the slits to form an elongated pocket 12, and a wire doup loop 2 the legs of which pass through the slits, substantially as described.

WILLIAM P. WOOD.

Witnesses:

Anion T. BURNS, EDNA V. GERvAIs.

Copies of this patent may be obtained for five cents each, by'addressing the Commissioner of Patents, Washington, D. G.

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