US2333413A - Loom shuttle - Google Patents

Description

Nov. 2, 1943. .1.` B. DAUDELIN ET AL LOOM SHUTTLE Filed Jan. l2, 1942 Patented Nov. 2, 1943 LOOM SHUTTLE Jean B. Daudelin, Fall River, Mass., and Rudolph J. ll/Iessier,` East Providence, R. I.

Application January 12, 1942, Serial No. 426,396

e claims.

This invention relates to shuttles of the type designed especially for use in automatic weftreplenishing looms,

It is the chief object of the invention to devise a shuttle of this general nature in which the danger of misthreading or unthreading will be substantially eliminated, which can be manufactured economically, and which will give a long period of substantially trouble-free service.

The nature of the invention will be readily understood from the following description when read in connection with the accompanying drawing, and the novel features will be particularly pointed out in the appended claims.

In the drawing,

Figure 1 is a plan view of the forward end portion of a shuttle constructed in accordance with this invention;

Fig. 2 is a side View showing the thread guiding elements in full lines, the relation between these members and the shuttle parts being illustrated by the dotted line showing of the latter; and

Fig. 3 is a vertical, sectional View approximately on the line 3 3, Fig. l, but on a somewhat larger scale.

The construction shown in the drawing comprises a shuttle body 2 having a chamber 3 in which a bobbin B is mounted in the usual manner. In front of this chamber the shuttle is provided with a threading slot 4 which starts at said chamber and runs forwardly substantially straight toward the point 5 of the shuttle.. Another slot, indicated at 6 in Fig. 2, is cut into the side of the shuttle and extends laterally into the slot 4, running back far enough to guide the thread into the shuttle eye '1. 'Ihese two slots or cuts cooperate to form a nose piece R around which the yarn is guided during the threading-up operation.

In order to guide the thread properly vduring this operation, the shuttle is equipped with a guiding device 9 which may conveniently be made of wire, one leg 1l of this member being inserted in a vertical hole in the shuttle and its lower end bent over into a slot formed within the body of the shuttle, as indicated at b in Fig.

while the part c above the shuttle body extends diagonally forward, as clearly shown in Fig. l, to a point d at the opposite side of the threading slot 4 where it passes under an overhanging portion I 0 of the shuttle body. That is, the material of the shuttle is cut away below this part H) and at one side of the threading slot, as shown at H in Fig. 3, to provide a groove or recess in the wall of said 'slot adapted to receive a part of the guide 9. Immediately after crossing the slot the guide is bent forwardly, as at d, providing a portion e which lies entirely under the overhanging wall i and this part extends forward to a point somewhat in front of the nose B where it is bent backwardly and forms a part f which extends along the diagonal edge of the nose piece. It is then bent at right angles to form an anchoring part g, Fig. l, which extends into a hole provided for it in the nose piece, Thus this guard 5 is secured rigidly in its operative position on the shuttle body.

During the normal operation of threading up, the thread T is drawn from the full bobbin B, i-mmediately after the latter has been forced into its operative position in the shuttle by the bobbin changing operation, and as the shuttle starts on its first pick following said operation. At this time the thread slides down into the open groove h, Fig. 3, immediately above the threading slot and it is directed by the guide 9 under the overhanging wall l0, around the edge of the guide and down into the threading slot 4. At the conclusion of that pick, and when the shuttle starts on its next pick, the thread is guided down through the slot 6 and into the delivery eye 1. There is a tendency at this time for the thread to pass over the nose piece 8 and thus to unthread the shuttle, but the relationship of parts of the guide 9 to the over-hanging wall l0 and to the nose piece 8 is such that misthreading practically never occurs. The proper guiding of the thread or yarn under the nose piece is further assured by the position of the forward curved end of the guide in an offset relation to the line of pull of the thread during the first pick, this relationship also makingA it practically impossible for the thread to move in any other path than down the slot ti, under the' forward portion of the guard and the nose piece, during the second pick.

There is, however. a strong tendency for the yarn as it comes off the end of the bobbin to form a balloon which may run forwardly out of the threading slot and an important feature of this invention resides in novel 'means for preventing unthreading in this manner. For this purpose a guard is provided consisting of a wire member I2, Fig. 3, located in the shuttle throat and bent to form an inverted U-shaped loop portion y', the opening in which lies directly in line with the axis of the bobbin B, so that when the threading-up operation vhas been completed this loop serves as a guiding eye for the thread as it runs forward from the bobbin to the delivery eye 1 At the right-hand side, Fig. 3, of the loop is a reversely curved part k, located in a vertical groove or recess I3 formed in the lateral wall of the shuttle throat. This part k is so spaced from the walls of the recess and from the floor of the shuttle throat as to provide only a very narrow or restricted passage between it and the lateral wall of the throat through which the thread can escape the guard by sliding around its right-hand edge into the threading slot 4 during the initial threading-up operation. It will be observed that the guard I2 extends upwardly and forwardly from the part k to a curved hump p, Fig. 3, located at a higher level than the top of said U-shaped loop and then slopes downwardly as it extends forwardly, its front end being bent down and anchored in the material of the shuttle at the bottom of Athe threading slot.

This guard effectually prevents a balloon. travelling forward as it leaves the bobbin after the threading-up operation has been completed. from running out of the shuttle. At the saine time it does not interfere materially with the threading-up operation since the yarn is not travelling as fast at this time and the slight natural twist which it carries serves to make it slide around the reversely disposed loop k on its Way down into the threading slot 4. It will be seen from an inspection of Fig. 1 that the slope between the loop k and the hump p assists in guiding the yarn into the sloty as it is drawn forwardly during the first stage of the threading-up action. That is, itV slides along the right-hand edge, Fig. 3, of the guard, downwardly around the curve k, and then up into the running space between the legs of the 1nverted U-shaped loop i. When a balloon comes along, its only possible way of dodging the guard is by passing under and around the reversely curved part k, since the other side of the guiding loop j is closed. Escapel around the part k, however, is blocked by the presence of the vertical rib or iiange M which forms one part of the wall of the groove I3 and lies between the bobbin chamber and the part k.

The invention thus provides a simple form of shuttle threading apparatus which `can .be r

manufactured economically, is very reliable in operation, and in which the parts are adequately protected from outside injury.

While we have 'herein shown and described a preferred embodiment of our invention, it is evident that thev invention may be embodied in other forms without departing from the spirit or scope thereof.

Having thus described our invention, what we desire to claim as new is:

l. A loom shuttle provided with a bobbin chamber, a threading slot extending forwardly from said chamber, a thread delivery eye at one side of the shuttle, said shuttle having a nose piece formed therein by a slot extending laterally from said threading slot and opening at the side of the shuttle for guiding the thread into said eye, and a guard extending transversely across said threading slot in the region of the shuttle throat where it serves to stop an outwardly running balloon, said guard having a part cooperating with an adjacent portion of the shuttle to provide a restricted passage, laterally disposed with reference to the guard, for the escape of the thread around the guard into the threading slot during the threading-up operation, the part of said guard around which4 the thread escapes being positioned in a recess in a lateral Wall of the throat portion of the shuttle and the wall of said recess at the side of said guard adjacent to the bobbin chamber lying between said part and said chamber where it serves to prevent a balloon from dodging the guard during the normal operation of the shuttle.

2. A loom shuttle provided with a bobbin chamber, a threading slot extending forwardly from s aid chamber, a thread delivery eye at one side of the shuttle, said shuttle having a nose piece formed threin by a slot extending lateral- 1y from said threading slot and opening at the side of the shuttle for guiding the thread into said eye, and a guard extending transversely across said threading slot in the region of the shuttle throat where it serves to stop an outwardly` 'running balloon, said guard having a part cooperating with an adjacent portion of the shuttle `to provide a restricted passage, laterally disposed with reference to the guard, for

.the escape of the thread` around the guard into the threading slot during the threading-up operation, `said guard including apart extending forwardly from the throat of the shuttle and along the threading groove, such forwardly extendingpart being sloped diagonally downward toward the bottom of said groove as it extends forwardly.

3. A loom shuttle comprising a wood body providedvwith a bobbin chamber and a thread guiding slot extending forwardly from said chamber, a thread delivery eye .at one side of the shuttle, said yshuttle body having a nose piece formed therein by a cut extending laterally from said threading slot and opening at the side of the shuttle for guiding the thread into said eye, and a guard positioned transversely across said threading slot .in the region of the shuttle throat and having an inverted U-shaped portion with a reversely curved surface at one end of said portion positioned in a recess formed in a lateral wall of the throat portion of the shuttle and spaced from the wall of said recess where it serves to prevent a balloon from dodging` the guard during the normal operation of the shuttle but the space between the kwall of said recess and'saidcurved surface of the guard being sufciently wide to permit the passage of the thread downwardly around said curve in the guard and then upwardly into the space in said U-shaped portion of the guard, said space being substantially in line with the axis of the bobbin and serving as a guiding eye for the thread as it runs out during the normal travel of the shuttle.

4. A loom shuttle according to preceding claim 3, in which said guard consists of a wire bent to the shape described and having a part extending upwardly from said reversely curved portion to a hump lying forwardly of said eye, said part being curved rearwardly and laterally and a part of its curved surface lying in said slot where it serves to guide the thread aro-und said reversely curved part of the guard and into said eye during the threading-up operation.l

5. A loom shuttle provided with a bobbin chamber, a threading slot extending straight forwardly from said chamber toward the point of the shuttle substantially in line with the axis of the bobbin, a thread delivery eye at one side of the shuttle, said shuttle having a nose piece formed therein by a cut extending laterally from said threading slot and opening at the sidev ofthe shuttle for guiding the thread into said eye, the material of said shuttle being cut away to provide a groove in the wall of said slot at the opposite side of the slot from said eye, Said groove extending beside said slot but being offsetl therefrom, a thread guide anchored in said shuttle at the opposite side of said slotl from said groove and having a thread guiding surface extending diagonally across the slot adjacent to the throat of the shuttle and then for- Wardly in the groove and out of it again, the forward portion of said guide being shaped and positioned to guide the thread under the point of said nose piece.

6. A loom shuttle according to precluding claim 5, in combination with a guard positioned transversely in the throat of said shuttle rearwardly of said diagonally extending thread guiding surface and provided with a thread guiding eye positioned approximately in line With the bobbin, said guard having parts cooperating With the throat portion of the shuttle to trap an outwardly running balloon and being provided with a surface lying partly in said slot and inclined laterally where it guides the thread around the guard and into said eye during the threading-up operation.

JEAN B. DAUDELIN. RUDOLPH J. MESSIER.

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