US1534033A - Attachment for looms - Google Patents

Description

April 21, 1925.

M. A. GOLDMAN ATTACHMENT FOR LOOMS Filed Nov. 13' 1 24 2 Sheets-Sheet I INI/EIVTOR mu/r/cs fl. GOLD/WAN A ril 21', 1925. 1,534,033

- M. A. GOLDMAN ATTACHMENT FOR LOOMS Filed Nov. 13. 1924 '2 Sheets-Sheet 2 INVENTOR UR/(f H. (OlDMA/V Z l I 4 TTORNEY Patented Apr. 21, 1925,

Units sr'rss arnr or MAURICE A. GOLDMAN, OF MILFORD. NE'W HAMPSHIRE, ASSIGNOR TO MILFORD TEX- lILE CORPORATION. OF MILFORD, NEW HAMPSHIRE, A CORPORATION OF NEW YORK. 1

ATTACHMENT FOR Looivrs.

Application filed November 13, 1924. Serial No. 749,690.

To all whom it may concern:

Be it known that I, MAURICE A. GoLnMAN, a citizen of the United States, residing at Milford, New I ampshire, have invented a new and useful Improvement in Attaclr ments for Looms, of which the following is a specification.

My invention relates to the manufacture of linen and jute fabrics and has reference more particularly to an attachment for a loom which is used to weave two or more widths of narrow cloth at one time.

In the manufacture of jute or linen materials intended for paddings, for some classes of bags, and for cutting up purposes generally, the quality or firmness of the selvage of the fabric is a matter of little importance, and where the material is so loosely woven and is designed for cutting up purposes, it is absolutely necessary to makesome provision atthe edges of each width, which will prevent the warp threads from working loose at these points. Such provision is termed the center selvage.

Briefly stated, this selvage consists of three threadsarranged with the warp, two thereof form plain cloth continually, while a third, called the doupe or leno, binds the whole firmly together; The lone crosses over the two warp threads, but drops below the weft every pick, first at one side and then at the other. When the leno is up at one side, the warp thread at the same side is under the weft. To permit of this twisting action, it is clear thatall three threads must pass through the same split of the reed. Therefore, it is necessary to leave suflicient space empty in the reed between each pair of cloths so as to form weft fringe at these places, i, e., cutting divisions between. the cloths.

Various complicated and expensive dcvices have been devised for working center and side selvagcs, but none have been genorally adopted in the jute and linen weaving industries.

with the above in mind, it is the principal object of my invention to provide an improved center-selva-ge attachment for looms, which is extremely simple in construction and which may be applied to any loom used for weaving a plurality of widths of narrow cloth at the same time,

The invention is illustratively exemplified in the accompanying drawings, in which Figure 1 1s a perspective view of my improved center-selvage attachment showing the arrangement of threads and a section of the woven material; Figure 2 is a substantially sectional view showing the relative positions of the parts and threads during one extreme ope 'ation of the loom; and Fi ure 3 is a similar View showing the same parts in the other extreme operation.

Referring to drawings, and ll designate the front and rear harnesses, respectively, of an ordinary draper 100m, both harnesses comprising a plurality of heddles 12 provided with eyes 13. The harnesses are raised and lowered alternately in the usual manner by suita le mechanism, not shown. The arrangement of the warp threads 14 comprises the ordinary layout in which alternate threads are received by the eyes of the front and back heddles. The weft thread 15 unwinds from a reciproeating bobbin 16 traveling in the space provided by the shedding of the warp threads 14- at the front of the front harness 10. The Warp threads 13 are released from a drum 17 at the rear of the loom and are arranged over a roller 18 and alternately between parallcl rods 19 before entering the eyes of the front and rear heddles 12. A suitable comb 20 is operatively situated at the usual position in front of the front harness 10 and is provided with a reed 21 from which several members have been omitted to provide wide splits 22 at predetermined intervals depending of course upon the widths of narrow cloth to be woven.

The mechanism and arrangement of threads just briefly described is typical of the draper loom and according to the pres ent invention practically no change eon templated in mechanism and only a' very slight rearrangement of certain warp threads require attention. Assuming that the loom is set up to weave more than one width of cloth at one time, and as explained in the foregoing, three threads are selected from each edge of a width and pass through a single split 22 of the reed. As illustrated in Figure 1, there are two groups of such threads shown, one thereoffor each edge of adjacent widths and for the sake of brevity,

since all groups are manipulated in the same manner, but one group will be described. 7

From left to right, the selvage threads are designated A, B, C, and A, B, and C, respectively, C and C are carried by the rear harness 11 and threads A and A, here'- after referred to as the leno or doupe threads, are also carried by the rear harness, one heddle to the left of the heddles carrying C and C. Threads B and B are disposed between the leno threads C, G and A, A respectively, and are'carried by the heddles of the front harness.

The attachment, comprising the present invention, fordrawing the leno threadsA, A over the threads B, B, C, C and below the path of travel of the bobbin 16, consists of a Y-shaped length offlexible link chain 23, the lower end of the stem portion thereof being suitably attached to the lower bar 2% of the front harness 10, and the free ends of the'Y-shaped portions being provided with rings or eyes through which 1 the leno threads A, and A are threaded.

It is preferable in a construction of this kind, when set tohandle a leno thread, to

- provide a separate drum from which the thread is fed toward the harnesses.

In Figure 2, such an auxiliary drum 26 is shown, and in practice it is designed to offer less resistance totheunwinding thread than that offered by the large warp drum 17. ;The operation of my invention is as follows:

Assuming that the rear harness 11 is in its upper position and the front harness 10 is in its extreme lower position, Figure 2, then threads G and C will form the upper wall of the shed, while threads B and B will form the lower wall. The leno threads A, A are pulled from the left over the top a of the two sets of threads 13,13 and C, G

and then downwardly to a position substantially parallel with the lower wall of the shed at the front of the front harness. This forms a passage for the bobbin 16 which is driven through in the usual manner to lay the weft thread 15. The positions of the .two harnesses are then reversed and the lone threads A, Acontiuue in the lower wall of the shed directly from the rear harness 11, because as the front harness rises the flexible properties of the chain 23 enable it to fall back over the threads B, B, i. e., to the left or normal.

positions. The bobbin 16 thereafter re turns through the newly formed shed and one complete selvage weave in the'center selvage is tied.

It will be clear that in both positions of harnesses 10 and 11, the leno threads A, A are always below the weft threads and it is merely the threads B, B and C, C which alternate to positions first above and then below the weft. Theleno threads A and A cross above the two warp threads and drop below the weft every pick, first at one side and then at the. other, but when the leno is up at one side the warp thread at the same side is under the weft. In other words the leno threads always form a part of the lower wall of theshed and the bobbin always travels in a path above the leno thread.

' Having now described my invention what I claim and desire to secure by Letters Patent is:

1. In a center selvage attachment for looms, the combination of a front and back harness, and a flexible leno guiding means carried by the front harness and of a length to enable the leno thread to lie in thelower wall of the shed for every pick.

2. In a center selvage attachment for looms, the combinationof a front and back harness, and means for guiding a leno thread comprising a flexifile member attached at one end to the lower portion of the front harness and provided with an opening at the free end to receive the leno thread of the weave, said member being of a length sufficient to enable the leno thread to lie in the lower wall of the shed for every, pick.

3. A center selvage attachment, comprising a flexible leno guiding member consisting of a linked chain having its upper portion separated into two portions to receive the leno threads of adjacent sclvages, substantially as described.

4. A center selvage attachment for the front harness of a loom, comprising, a Y-shaped fleiiible linked chain having the lower portion fixed to the lower portion of the harness and the free upper ends provided with means to loosely embrace the leno threads of the loom.

In testimony whereof, I have signed my name to this specification, this 7th day of I

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