US1581600A - Automatically-threading shuttle for looms - Google Patents

Description

April 20 1926. 1,581,600

I. SNOW AUTOMATICALLY THREADING SHUTTLE FOR LOOMS Filed Dec. 11, 1925 I //\/l/ENTOR-.' og/aA/e A TTO RNEZY' Patented Apr. 20, 1926.

UNITED STATES PATENT OFFICE.

ISAAC SNOW, OF LAWRENCE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORATION,

OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

AUTOMATIGALLY-THREADING SHUTTLE FOR LOOMS.

Application filed December 11, 1925.

To all whom it may com-amt:

Be it known that I, ISAAC SNow, a citizen of the United States, residing at Lawrence, in the county of Essex and State of Massachusetts, have invented an Improvement in Automatically-Threading Shuttles I for Looms, of which the following description, in connection with the accompanying drawings, is a specification like characters on the drawings representing like parts.

This invention relates to automatically threading shuttles for looms whereby the shuttle is threaded while the loom continues to run.

In that type of automatically threading shuttles for looms shown and described in the Stimpson Patent, No. 1,483,492, Feb. 12, 1924, the longitudinally extending thread passage is provided with a thread casting device which operates to cast the thread upwardly out of the thread passage on the occurrence of a loop or overthrow, and, as the shuttle is again picked, the thread returns to the control of the threading block.

' When the shuttle is picked following replenishment, or after an overthrow which has served to unthread or partially unthread the shuttle, the swirling action of the thread as it is drawn from the bobbin eifects a return of the thread into control of the thread casting and guiding device. It may happen at times, owing to the character of the thread in use, especially where it is of kinky character, that the thread may not at once pass into control of the thread casting and guiding device, and one of the purposes of the present invention is to provide an automatically threading shuttle of the type indicated, wherein provision is made for taking control of the thread in case the thread casting and guiding device itself has failed to do so, so that on the return of the shuttle to the replenishing side of the loom the thread may be drawn from the end of the bobbin and weaving continue uninterruptedly.

In accordance with the present invention, the thread casting and guiding device, which is located in the longitudinally extending thread passage, is provided with a Serial No. 74,737.

catch, so arranged that should the thread fail to pass into control of the thread castmg and guiding device, it will be engaged by the catch and withdrawn from the end of the bobbin as the shuttle returns to the, replenishing side of the loom.

The invention and novel combination of parts will best be made clear from the following description and the accompanying drawings of one good form thereof.

In the drawings:

Fig. l is a plan View of the threading end of aloom shuttle containing the present inventlon;

Fig. 2 is a perspective view of the threading block and thread casting and guiding device containing the present invention;

Fig. 3 is an enlarged detail view of the thread casting and guiding device with the associated catch; and

Fig. 4 is a side, perspective view of the thread casting and guiding device, showing a modified form.

The loom shuttle 1 is provided with the bobbin chamber 2 in which the filling carrier or bobbin 3 is supported, preferably by holding jaws engaged with the head of the bobbin, but since such holding jaws and manner of holding the bobbin in they shuttle forms no part of the present invention and may be of usual construction now well understood, it is not herein shown.

Frontward of the bobbin chamber 2, the shuttle is provided with a threading block receiving chamber 4 and the side delivery eye 5, and mounted in the threading blockreceiving chamber is the threading block 6 which is provided with a longitudinally extending thread passage having an unobstructed top opening for the ready entrance and exit of the thread.

As shown in the present instance of the invention, the side walls 7 and 8 of the threading block define the longitudinally extending open thread passage, and at the rear ends of the side walls 7 and 8 the block is inclined upwardly from the bobbin chamber as at 9 and 10, the purpose being to prevent interference with the proper ballooning of the thread as it leaves the filling carrier or bobbin in the shuttle and to facilitate the upward movement of the thread when it is cast upwardly out of the longitudinally extending thread passage by the thread casting and guiding device.

The side wall 8 of the threading block which is adjacent the side delivery eye is provided with an apron 11, and frontwardly and laterally extending end 12, constituting a thread director, and between the thread director and side delivery eye is a pas sageway 13 for the passage of the thread to the side delivery eye, substantially as indicated and more fully described in the patent to Stimpson hereinbefore mentioned. Y

The thread casting and guiding device 14 is located in the longitudinally extending thread passage, and is herein shown as constituted by a scroll preferably formed of sheet metal and having a'base portion 15 which passes through a side opening inthe threading block and is receivedin a recess 16 under the lower wall of the block. The thread casting and guiding device or scroll 1 1 extends upwardly at one side of the thread passage, as at 17, and is then turned frontwardly and laterally to cause the thread to be thrown upwardly on the occurrence of a loop or overthrow as the shuttle is brought to rest in the shuttle box. The function of the thread casting and guiding device or scroll 14 is substantially the same as that more fully described in the Stimpson patent.

Upon ordinary operation of the loom, the thread casting and guiding device will take control of the thread on the first pick following replenishment, or on the pick following an overthrow with consequent partial or complete unthreading of the shuttle, but at times (and especially withkinky yarn) the thread casting and guiding device may fail to hold the thread, or, if the thread is unduly kinky, it is liable to be disengaged from the thread casting and guiding device during the flight of the shuttle. This is especially observable when the shuttle is picked from the filling replenishing side of the loom after replenishment or after par tial or complete unthreading of the shuttle, and the present invention contemplates a catch extending from the thread casting and guiding device or scroll to take' control of the thread and act as a leader should the thread casting and guiding device or scroll fail to function, so that on the pick of the shuttle to the replenishing side of the loom, the thread may lead over the catch and be drawn from the end of. the bobbin without breaking the thread. i

As indicated more clearly in Figs. 2 and 3,"the scroll 14 has a frontwardly extending end portion 18 which terminates rear-ward of a bridge 19 at the forward end of the thread passage, over which the thread leads on its way to the side delivery eye during weaving.

At the rear portion of the thread casting and guiding device or scroll 1 1 there is formed a thread catch 20 which, as indicated in Figs. 2 and 3, is preferably constructed by providing a slot 21 in the rear end portion of the thread casting and guiding device or scroll. It is sometimes desirable to carry the end portion 22 of the catch slightly beyond the contour or rounded surface of the scroll 14, as more clearly indicated in Figs. 2 and 3, the construction being such that as the thread is drawn from the end of the filling carrier or bobbin on the pick following replenishment or after complete or partial unthreading of the shuttle, the swirling thread will be engaged by the thread catch and be guided by its swirling action into control of the thread casting and guiding device or scroll. If, however, owing to the kinky character of the yarn, the thread fails to pass into control of the thread casting and guiding device or scroll, or leaves such control during the flight of the shuttle from the replenishing side of the loom, the thread will be engaged by the catch 20 and pass into the slotted portion 21, so that as the shuttle is returned to the filling replenishing side of the loom, it will draw over thefront edge portion of the catch and not be broken.

The thread casting and guiding device, as hereinbefore noted, has the upwardly extending portion 17, and the rear edge portion of the catch 20 extends laterally, as at 23, and frontwardly as at 24:, so that on the occurrence of a loop or overthrow, when the shuttle is arrested in the replenishing box, the thread will be cast upwardly out of the thread passage.

The thread casting and guiding device or scroll 14 and the catch carried thereby may be secured in cooperative relation with the threading block by the usual transverse bolt which passes through the opening 25 of the threading block and the opening 26 in the side portion of the thread casting and guiding device or scroll, although it is obvious that other means may be employed to secure the thread casting and guiding device or scroll in operative position.

On the first pick of the shuttle following replenishment or an overthrow of the thread which may have partially I or wholly unthreaded the shuttle, the swirling action of the thread as it is withdrawn from the filling carrier or bobbin will ordinarily cause the thread to move into control of the thread casting and guiding device or scroll, but should the yarn be unduly kinky or fail from other cause to pass into control of the thread casting and guiding device or. scroll on such first pick of the shuttle, the catch 20 will engage the thread, especially if the end 22 thereof extends beyond or laterally of the scroll, and on the return of the shuttle to the replenishing side of the loom the thread will draw over the front edge portion of the catch 20 in the slot 21 and be withdrawn from the filling carrier or bobbin in the shuttle in adirection to prevent breakage of the thread.

The construction hereinbefore described constitutes the preferred form of the invention, but the thread catch may obviously be otherwise formed, as for instance, 1n the manner indicated in Fig. 4. In the modification, Fig. 4, the thread casting and guiding device or scroll 14 has its edge port on 17 adjacent the bobbin chamber extending upwardly, then laterally as at 27, and frontwardly as at 28, the effect being that upon the occurrence of a loop or overthrow the thread will be cast upwardly from the thread passage. In the construction indicated in Fig. 4, the thread catch 29 extends from the side portion of the thread casting and guiding device or scroll, and is shown as formed by punching out a piece of the metal of the scroll and turning it outwardly about an axis 80, the front edge portion of the catch as at 81 being rounded backwardly to constitute a guide for the thread when the shuttle is picked towards the replenishing side of the loom and has failed to pass into control of the thread casting and guiding device.

lVhat is claimed is:

1. In an automatically threading loom shuttle, the combination of a threading block having a longitudinally extending thread passage, a thread casting device in the 1011- gitudinally extending thread passage for casting the thread upwardly from the thread passage on the occurrence of a loop or overthrow, and a catch carried by the thread casting device to take control of the thread on the pick following replenishment in case the shuttle fails to be partially threaded on that pick.

2. An automatically threading loom shut lle having a longitudinally extending thread passage, a thread casting device in the longitudinally extending thread passage "for casting the thread upwardly from the thread passage on the occurrence of a loop or overthrow as the shuttle is arrested, and a catch extending from the thread casting device adjacent its rear portion to take control of the thread in case the shuttle is unthreaded on its return to the replenishing side of the loom.

3. An automatically threading loom shuttle having a longitudinally extending thread passage and side delivery eye, a

thread casting device in the thread passage for casting the thread upwardly from the passage on the occurrence of a loop or overthrow, and a thread catch extending from the thread casting device to take control of the thread and act as a leader for the thread when the shuttle is unthreaded as it is picked towards the replenishing side of the loom.

4. An automatically threading loom shuttle, the combination of a threading block having an open longitudinally extending thread passage, a thread casting scroll in the thread passage for casting the thread upwardly from the thread passage on the occurrence of a loop or overthrow, and a thread catch formed as a finger extending from the thread casting scroll to take control of and guide the thread in case the thread fails to pass into control of the thread casting scroll.

5. In an automatically threading loom shuttle, the combination of a threading block having a longitudinally extending thread passage, a thread casting scroll in the thread passage to cast the thread upwardly from the thread passage 011 the occurrence of a loop or overthrow, the portion of the scroll adjacentthe bobbin chamber being slotted to form a thread catch, for taking control of the thread should the shuttle fail to be threaded on the pick following replenishment of filling or an overthrow.

6. In an automatically threading loom shuttle, the combination of a threading block having a longitudinally extending thread passage, a thread casting scroll in the thread passage to cast the thread upwardly from the thread passage on the occurrence of a loop or overthrow, the portion of the scroll adjacent the bobbin chamber being slotted to form a thread catch extending laterally of the thread passage for taking control of the thread should the shuttle fail to be threaded on the pick following replenishment of filling or an overthrow.

7. In an automatically threading loom shuttle, the combination of a threading block having a longitudinally extending thread passage, a thread casting device in the longitudinally extending thread passage for casting the thread upwardly from the thread passage on the occurrence of a loop or overthrow, and a catch carried by the thread casting device and having a backwardly extending front edge to take control of the thread on the pick following replenishment in case the shuttle fails to be partially threaded on that pick.

In testimony whereof, I have signed my name to this specification.

ISAAC SNOW.

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