US1661308A - Shuttle - Google Patents

Description

Patented Mar. 6, 1928.

' UNITED srA'Tas MILTON H. RUBIN, 01' NEW YORK, N. Y.

Application filed January 7, 1826. Serial No. 79,717.-

This invention relates to looms, and has to do more particularly with shuttles for automatic looms.

'In automatic looms, the bobbins in the shuttles are automatically removed when the supply of thread is exhausted, and bobbins containing a new supply of thread are inserted in place. This changing of bobbins in the shuttles takes place while the loom is in operation, and the shuttles are so constructed that the thread of the new bobbins is automatically threaded through the eye of the shuttle by the movements of the shuttle across the loom.

When a shuttle comes to a stop after a movement across the loom, there occurs a slack or looseness in the weft thread, and as a result the fabric which is woven has an uneven or rough appearance as distinguished from the smooth and even appearance desired in fabric of high quality.

It is desirable to maintain a tension upon the thread during weaving and also to take up the slack or looseness in the thread which occurs when the shuttle comes to a stop after a movement across the loom, and in providing such a shuttle constructed to maintain a tension upon the thread and to take up the slack in the thread for use with automatic looms, the thread tensioning and takeup device must be of such a nature that it can be automatically threaded.

This invention is directed to the provision of an automatically threading shuttle, and it has to do more particularly with the provision of an automatically threading shuttle so constructed that the slack or looseness which occurs in the weft thread when the shuttle comes to a stop after each pick will be taken up, and the thread held under tension at all times.

In that embodiment of the invention which I prefer to employ, the shuttle contains the usual bobbin recess and eye through which the thread from the bobbin is drawn. -Within the shuttle and placed to act upon the thread between the bobbin and the eye is a tension and take-up device comprising stationary and movable. thread engaging members. The latter are so formed that the thread is brought into engagement with them as the shuttle is threaded by its movement across the loom, and

means 3 for receiving and holding a they are movable by suitable means so as to put a tension on the thread and-also to take up any slack in the thread at the end of the shuttle travel.

In the accompanying drawings is shown one form of the invention which is considered satisfactory and in these drawings:

Fig. 1s a perspective view of the shuttle; Flg. 2 1s a horizontal section on line 2-2 of Flg. 3 showin various positions of the thread as it is bemg threaded through the shuttle eye and take-up device; Fig. 3 is a vertical section taken on line 3-3 of Fig. 2; Flg. 4 is a horizontal section taken through a portion of shuttle showin the weft thread threaded through the ta e-up device and out through the eye in operating pos1't1on; Fig. 5 is a sectional view taken on line 5-5 of Fig. 2; Fig. 6 is asectional view taken on line 6-6 of Fig. 2. Referring to the drawings the shuttle 1 18 provided with a recess 2, and gripping obbin 4 upon which is wound a supply of weft thread 5. The thread 5 is withdrawn from the bobbin and out through a suitable outlet or eye 10 positioned adjacent one end of the shuttle. The up er surface of the outlet end of the shatt e is closed as shown at 11, and a suitable slot 12 is proyided through the closed surface 11. Leadlng from the slot 12 is a passageway13 in which are mounted thread guiding members 14 and 15 which are shaped to guide the thread toward the. eye but have a slight hook formation to prevent the reverse movement of the thread.

The shuttle operates back and forth across the loom, and when the thread supply on the bobbing 4 becomes exhausted that bobbin is removed and a new bobbin is automatically inserted. The new bobbin is inserted when the shuttle is at rest in the shuttle box at one side of the machine, and the thread leading from the bobbin is made fast, so that upon the next movement of the shuttle, which would be a movement from right to left of the shuttle shown in Fig. 1, the weft thread takes the direction indicated by the full lines in Fig. 2 and is drawnthrough the slot 12. The shuttle then enters the box on the left side of the machine and comes to a stop. Its

by reciprocating up device is positioned, which. consists of an arm 21 fulcrumed at 22 and having an extension 23 which is acted upon by a res1l1- ent member 24 which may be a rubber band as shown in the drawing, or a metal sprin member. Upon the arm 21 there are a number of open loops 30, three of which are shown. As shown in Figs. 5 and 6 each loop is formed with an entrance end through which the thread passes as it enters the loop. This entrance end is formed by bending one end of the loop over the other to provide an entrance 31 having converging walls which direct the thread into the loop.

The overlapped ends of the loop prevent the thread from moving out of the loop through the entrance end. The normal position of .the arm 21 is below the slot 12 in the upper surface of the body of the shuttle, so that the open ends of the loops are immediately below the slot. a

. After the insertion of a bobbin with a new sup ly of thread, and upon movement of the s uttle across'the loom the thread is drawn through the slot 12 and at the same time it is drawn through the open ends 31 and into the loops 30. Positioned within the cavity 20 are hooks 35 twoof which are shown. These hooks are provided with slanting surfaces 36 and are arranged at an angle so that when the arm 21 approaches the hooks 35 by movement around its fulcrum 22 the arm 21 will be substantially parallel with a line drawn through the hook members. After the bobbin with the new supply of thread has been inserted in the shuttle and the shuttle has moved across the loom drawing the weft thread through the slot 12 and in the open loops 30, the next 1novement of the shuttle is back across the loom which would be a movement from left to right of the shuttle shown in the drawing. On this second movement of the shuttle the weft thread is drawn through the passageway into the eye 10, and as the thread is under tension, it pulls the arm 21 around its fulcrum 22 against the action of the resilient member 24, and the arm 21 takes the position as shown in the dotted lines in Fig. 2. In this'position the open loops 30 pass beyond the hook members 35 and as the loops pass the hooks the thread which extends through the loops is caused to slide over the slanting surfaces 36 of the hooks 35, and to be engaged by the hooks. Thus the tension and take-up device is threaded at the time the thread is automatically threaded through the eye of the shuttle.

When the shuttle and take-up device are thus threaded the weft thread 5 is drawn through the loops 30, under the hooks35' and then out through the eye 10 of the shuttle. As the shuttle moves across the loom the tension upon the weft thread pulls the arm 21 around. its pivot and against the action of the resilient member 24 until the member 21 assumes a position similar to that shown in dotted lines in Fig. 2, the degree to which the arm is pulled depending upon the strength of the resilient member. When the shuttle comes to rest at either side of the loom the resilient member 24 pulls the pivoted arm 21 in the opposite direction and the open loops 30 co-operating with the hooks 35 cause the thread to take the position as indicated at Fig. .4, thus taking up. the slack in the thread and holding the thread under tension. This operation continues until the supply of thread upon the bobbin is exhausted whereupon the exhausted bobbin is removed and a bobbin with a new supply of thread is inserted and the threading operation as above described is repeated.

I claim:

1 1. A shuttle for automatic looms comprising a shuttle body having a recess for holding a bobbin, an opening through which the thread from the bobbin passes, and a thread tensioning and slack take-up device mounted within the shuttle comprising a resiliently pivoted member, rings on said member into which the thread is directed formed with a turn-in hook to prevent dislodgment of the thread, a plurality of hooks secured within the shuttle body and adapted to engage the thread, and a spring member acting upon the pivoted member so as to restrain said member around its pivot against the pull of the thread and away from the hooks whereby a tension is maintained upon the thread.

2. Ina tension and slack take-up. device for loom shuttles comprising a pivoted member having thread receiving rlngs through which the thread is automatically passed, hooks formed within said rings to prevent dislodgment of the thread, a resilient member constraining the pivoted member to move around its pivot against the pull of the thread, and stationary hook members within the shuttle body adapted to engage the thread and cooperate with the rings so as to maintain atension upon the thread, said hooks havinginclined surfaces over which i the eye of the shuttle by the reciprocating movements of the shuttle, a thread tensioning and take-up device positioned within the shuttle including a pivoted arm carrying rings, said rings being open to receive the thread upon one movement of the shuttle across the loom and closed against dislodgment of the thread, and hooks secured to the shuttle body, said hooks being formed to catch and hold the thread upon movement of 10 the pivoted arm during a reverse movement of the shuttle across the machine whereby the thread is automatically held by the hooks.

In testimony whereof I affix my signature.

MILTON I-L- RUBIN.

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