US1766731A - End-holding means for weft-replenishing looms - Google Patents

Description

R G. TURNE R 1,766,731

END HOLDING MEANS FOR WEFT REPLENISHING LOOMS June 24,1930.

2 Shets-Sheet 1 Filed Jan. 31, 1929 llllllllllllllllllllll June 24, 1930. N R 1,766,731"

END HOLDING MEANS FOR WEFT REPLENISHING LOOMS Filed Jan. 51, 1929 2 Sheets-Sheet 2 l/zrmfor Ema/"0 E ZZWW Patented June 24, 1930 UNITED STATES FFECE RICHARD G. TURNER, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T CROMPTON &, KNOWLES LOOlVI WORKS, 0F WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS END-HOLDING MEANS FOR WEFT-REPLENISHING LOOMS Application filed January 31, 1929. Serial No. 336,626.

This invention relates to an improved clevice for holding a weft end after bobbin transfer in an automatic weft replenishing loom.

My invention is particularly applicable to a loom in which the weft ends of each pair of bobbins are secured together before insertion in the magazine.

It is the general object of my invention to provide means for clamping and holding a trailing weft end after the first bobbin of a pair is transferred and until the second bobbin is transferred.

A further object is to provide end holding means so constructed that it will be selfclearing and that it will not be rendered inoperative by the successive presentation of two or more weft ends thereto.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in'the appended claims.

A preferred form of the invention is shown in the drawings in which Fig. 1 is a plan view of parts of a loom embodying my invention;

Fig. 2 is a partial front elevation, taken along the line 22 in Fig. 1;

Figs. 3 and i are transverse sectional elevations, taken along the lines 33 and 14t in Fig. 2; and

Figs. 5 to 11 inclusive are diagrammatic views, illustrating the operation of my 1mproved end holding means.

Referring to the drawings, I have shown a portion of a lay having superposed shuttle boxes 11 in which upper and lower shuttles S and S may be received. The -weft carriers IV are preferably mounted in a single vertical magazine compartment 15, and the weft ends of adjacent bobbins or weft carriers are tied together in pairs, as indicated in Fig. 3. Transferrers 16 and 17 are mounted on the breast beam 20 and act to transfer a weft carrier horizontally rearward upon indication of weft exhaustion in either one of the shuttles S or S.

The loom thus described is particularly designed for the weaving of a double pile fabric and the breast beam 20 is provided with a supporting plate 22 mounted thereon the cross bar 23. The lower portion of the weight or disc 25 is beveled, as indicated at 27 and the weight rests freely on the upper surface of the plate 22.

A guide-plate 30 (Figs. 1 and 2) is mounted on the base of the magazine 15 and provides a smooth surface for engagement by the weft during the operations to be described.

Referring to Figs. 5 to 11, I have shown the successive positions of the weft ends and their relation to the weight or disc 25 during the continued operation of the loom. In each figure, I have also indicated a stack of bobbins in end view, so that the successive transfers may be readily followed. The several bobbins shown have been lettered from A to H inclusive for the sake of clearness.

In Fig. 5, I have indicated the lowermost bobbin A as having been transferred to one of the running shuttles and have shown the trailing weft end 32, as tied to the lowermost bobbin B remaining in the magazine.

As the weaving of the cloth continues, the place in the cloth at which the weft end 32 enters the selvage will 'be moved gradually forward and in the course of a few inches travel the weft end 32 will be drawn against the beveled portion 27 of the weight 25 and will be thus guided under the weight, where it will be clamped between the bottom surface of the weight- 25 and the top surface of the plate 22 (Fig. 6).

The weft end 32 will be drawn fairly tightly between the guide plate 30 and the weight 25 and continued forward movement of the cloth will thereafter break the weft end 32 between the weiglit 25 and the sclvage, as indicated in Fig. 7.

\Vhile the end 32 is thus held, the weft carrier D in the magazine may be transferred to the upper shuttle, causing an additional weft end 34 to extend from the bobbin C to the selvage (Fig. 8). This weft end 34 will be gradually drawn forward and finally clamped under the weight 25 and then broken, as shown in Fig. 9.

If the lowermost bobbin B is then transferred, as indicated in Fig. 10, the weft end 32 will extend from the weight 25 to the bobbin B in the running shuttle and will tension the weft sufficiently to lay the weft straight and to cause threading of the shuttle.

As the cloth moves forward under the cross bar 23, the weft end will finally be pulled away from under the weight 25 and will remain attached to the selvage until it is trinuned off in the finishing operation. The pulling out of the weft end does not release the weft end 34, which remains held by the weight until the remaining bobbin C of its pair is transferred.

In Fig 11, I have indicated the transfer of the bobbin F, providing a third weft end 36 to be caught and held as above described.

By this exceedingly simple construction, I am able to securely clamp and hold the Weft end attached to the remaining bobbin of a pair for as long a period as may be necessary, and the clamping device is effective to cause the transferred bobbin to lay a properly tensioned weft in the shed and also to thread the shuttle.

After the second bobbin of a pair is transferred, the weft end is pulled away fronrthe clamping device in the course of weaving, so that the end holding means is self-clearing and will never become clogged with severed pieces of weft which might interfere with the successful operation thereof. Furthermore, the weight 25 is equally effective whether one or more weft ends are clamped thereunder, and each weft end is held independently of the others.

\Vhile I have described my invention as used in a loom having two shuttles and having bobbins tied together in pairs, the 1nvention is not necessarily limited in its utility to this particular type of loom and I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is 1. In a weft replenishing loom, end holding means positioned between the magazine and the cloth selvage and ada )ted to receive and hold the weft end extent ing from the magazine to the selvage, said means comprising a loosely mounted weight, and a support for said weight having a surface with which said weight engages by gravity, the weft end being clamped between said weight and said surface.

2. In a weft replenishing loom, end holding means positioned between the magazine and the cloth selvage and adapted to receive and hold the weft end extending from the magazine to the selvage, said means comprising a loosely mounted weight with a beveled lower portion, and a support for said weight having a surface with which said wei ht engages by gravity, the weft end being clamped between said weight and said surface.

3. In a. weft replenishing loom, end holding means positioned between the magazine and the cloth selvage and adapted to receive and hold the weft end extending from the magazine to the selvage, said means comprising a support having a flat upper surface, a stud fixed in said support, and a weight freely rotatable on said stud and having its lower surface engaging the top surface of said support, the weft end being clamped between said weight and said surface.

4. In a weft replenishing loom, end holding means positioned between the magazine and the cloth selvage and adapted to receive and hold the weft end extending from the magazine'to the selvage, said means comprising a support and a member held by gravity thereon, said men'iber being yieldable upwardly to permit said weft end to be drawn thereunder.

5. In a weft replenishing loom, end holding means positioned between the magazine and the cloth selvage and adapted to receive and hold the weft end extending from the magazine to the selvage, said means comprising a support and a member held by gravity thereon, said member being yieldable upwardly to permit said weft end to be drawn thereunder and being rotatable by said weft end as the slack thereof is taken 6. In a weft replenishing loom, a magazine, and end holding means positioned to be engaged by a weft end extending between said magazine and the cloth selvage, said holding means limiting breakage of said weft end to the portion thereof between said holding means and the cloth selvage, and therea ter retaining the portion of weft end extending to said magazine.

7. In a weft replenishing loom, a magazine, and end holding means positioned to be engaged by a weft end extending between said magazine and the cloth selvage, said weft end being broken between said holding means and the selvage by continued travel of the woven fabric, and said holding means thereafter retaining the portion of the weft end extending to the magazine.

8. In a loom, an idle yarn carrier capable of being rendered active to weave, a weft end extending from the carrier to the selvage of the cloth being woven, and a clamping device having a yieldable element, the weft end moving forwardly with the cloth as weaving continues and engaging and causing the yieldable element to move into clamping relation with said element.

9. In a weft replenishing loom, a reserve weft yarn carrier capable of being put into action to weave, a weft end extending from the reserve carrier to selvage of the cloth during the normal operation of the loom, and means to clamp the weft end as the same moves forwardly with the cloth.

In testimony whereof I have hereunto affixed my signature.

RICHARD G. TURNER.

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