US1944830A - Loom for weaving without a shuttle - Google Patents

Description

. Jain. 23, 1934.- v P. J. A. VERRIERE 1,944,830

LOOM'FOR WEAVING WITHOUT A SHUTTLE Filed Nov. '5, 1932 [Ia/@3601 "LOULS PIERRE JUL'EN ANTOINE. VERR ERE MaZhQ-w A t tbm eyS Patented Jan. 23, 1934 UNITED STATES LOOM FOR WEAVING WITHOUT A SHUTTLE Louis Pierre Julien Antoine Verriere, Mardore Par Pont-Trambouze, France Application November 5, 1932, Serial No. 641,349,

- and in France October 31, 1931 2 Claims.

The subject matter of the invention is an improvement in a needle with a notch adapted for introducing weft threads in looms for weaving without a shuttle and particularly in the looms 5 of the Garcia Moya type perfected by Ballber 8: Cie enabling them towork with a number of kinds of wefts which follow each other in any desired order.

It is useful, for the proper understanding of the said improvement, to call to mind broadly the operation of the looms in question.

In these looms, the weft thread is supplied by and unwinds from a large laterally placed bobbin disposed outside of the passage of the fabric and is inserted in the shed by means of a long needle formed of a band or ribbon of flat steel, one extremity of which is provided with a head with an eye through which the weft thread passes, while the other extremity is fixed to a pulley which is 20 given an alternating movement and on which the steel ribbon is wound and unwound.

According to the present invention the head of the needle, instead of having a simple eye is provided with a slit or notch so that the weft thread may be inserted into it and withdrawn from it. This needle penetrates into the shed and the thread, slipping in the eye, then forms the two sides of an acute angle of which this needle occupies the apex.

The essential feature of the mentioned notch is that it is arranged obliquely with respect to the direction of the motion of the needle and to the direction of the warp threads, the latter can therefore not enter it, which eliminates the risks of having the warp accidentally caught in the course of the displacements of the notch in the shed.-

On the other hand, as the various weft threads are intentionally grouped in their waiting position in a narrow palmette, whose mean direction corresponds to that of the notch, it suffices to have these weft threads raised and lowered one after another in any order for the purpose of introducing them into the notch or removing them from it with the greatest facility. It must be explained that in their waiting position the weft threads are tensed and that the working weft thread is itself tensed at the moment when it is taken from the oblique slit.

to The invention is explained in detail together with the accompanying drawingillustrating one example of embodiment wherein the weft threads in their waiting position are shown as disposed below the needle, but there is nothing to prevent a different form of embodiment in which the oblique notch would be open from bottom to top and the weft threads above it.

Figure 1 is a view in the plane of the head of the needle. seen from above.

Figure 2 is an elevation seen from in front, the head of the needle being placed between the observer and the reed of the loom.

- Figure 3 is a horizontal section along the line 3-3 of Figure 2.

Figure 4 is a perspective view of the head of the needle seen from below and front.

Figure 5 is a horizontal section corresponding to Figure 3, made through the head of the needle after the introduction of the thread at the moment when the head of the needle enters the shed again.

According to the invention and according to the methods of carrying it out to which it appears that preference ought to be accorded in practice, the head a of the needle is formed on its bottom face with an oblique notch b that starts on the front face and extends toward the rear face and there forms a groove c.

The front face, at the point at which this notch b begins, has an opening d in the form of an. eye which is open on the side of the point of the needle and is bounded by a rounded tongue 2.

When the weft thread a: (Fig. 5) is raised to be inserted in the shed and when it is tensed, it strikes against the head of the needle and glides on its lower surface until by reason of the forward motion of the head it falls into the notch b and through it reaches the opening d where it is held by the tongue e. During the return movement of the head of the needle, the thread readily detaches itself from its engaged position in the notch when said weft thread is lowered, and as a matter of fact, during the return movement of the head, the tensed weft thread automatically disengages itself from the the tongue e, and all that is needed is to lower the thread in order to take it out of the notch.

The fabric is represented diagrammatically at y in Fig. 5 with its selvedge 2.

X X, X represent other weft threads which, as already indicated, are grouped in a narrow palmette and tensed, and these threads may in their turn enter the oblique notch and leave it by a simple raising or lowering motion. 105

The use of such a needle with a notch requires that the weft thread chosen to function is alternately stopped and released as hereinafter indicated.

1. Starting of the need e and simultaneous inno sertion into the notch of the weft thread which is ofiered to it in a stretched condition.

2. Return of the needle during which the weft thread is again tensed, and then lowered.

It .will therefore be seen that the weft thread is taken out at each return of the blade and that any desired weft thread may be inserted in the notch.

These'alternations of engagement and release of the weft thread are precisely those which take place in the Garcia-Moya type of loom perfected by Baliber 8: Cie.

Without departing from the essence of the invention, it is of course possible to produce the portion of its length, having at the rear end a.

downward extension at least partially of uniform width with the remainder of the needle, which extension is practically bifurcated so as to provide an open bottom groove in the longitudinal direction, while terminating at the other end in a point and rearwardly of said point being formed upon one side with an oblique slot extending upwardly in a rearward direction and at the bottom out back a distance to form a rearward bottom notch, the upper part of the needle being formed with a centrally disposed channel extending the length of the needle rearwardly from the oblique slot.

2. A metal needle for a loom of the-type operating without a shuttle, having a substantially uniform rectangular cross section throughout the major portion of its length and a downwardly curved extension increasing the vertical dimension of the needle at the rear end, which extension is practically bifurcated upon the bottom so as to present a bottom groove in the longitudinal direction, which at the other end said needle is provided with a pointed head and rearwardly of said head formed upon one side with an oblique slot extending upwardly in the rearward direction and at the bottom cut back a distance so as to form a rearward bottom notch, and upon the same one side said needle is adapted to receive and be attached to the end of a relatively thin strip of metal flush with said side,

there being also alongitudinal groove upon'the I LOUIS, PIERRE, JULIEN.

ANTOINE VERRI ERE.

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