US762247A - Self-threading loom-shuttle. - Google Patents

Description

PATENTBD JUNE 7, 1904.

J. H. NORTHROP. SELF THREADING LOOM SHUTTLE.

APPLICATION FILED JULY 24, 1903.

N0 MODEL.

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PATENT OFFICE.

JAMES H. NORTHROP, OF TUSTIN, CALIFORNIA, ASSIGNOR TO DRAPER COMPANY, MAINE.

OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF SELF-THREADING LOOlVl-SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 762,247, dated June 7, 1904.

Application filed July 24, 1903. Serial No. 166,809- (No model.)

To all whom it may concern.-

Be it known that I, J AMES H. NORTHROP, a citizen of the United States, and a resident of Tustin, county of Orange, State of California, have invented an Improvement in Self- Threading Loom-Shuttles, 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 more particularly to so-called self-threading shuttles, wherein the threading operation is performed automatically when a fresh filling-carrier is inserted in the shuttle, such a shuttle being used in a loom such as forms the subject-matter of United States Patent N 0. 529,940.

One of the objects of my invention is the production in a self-threading shuttle of novel means for maintaining a substantially uniform and constant tension or drag upon the thread during weaving.

The various novel features will be fully described in the subjoined specification, and particularly pointed out in the following claims.

Figure 1 is a top or plan view, centrally broken out, of a self-threading shuttle embodying one form of my invention. Fig. 2 is a side elevation of the delivery end thereof. Fig. 3 is a perspective view of the shuttle end shown in Fig. 2, showing more clearly the manner in which the delivery-eye is made. Fig. 4 is a transverse section on the line at I, Fig. 1, 7

looking toward the left. Fig. 5 is a perspective view of the thread-guide detached, and Fig. 6 is a similar view of the tension device.

I have herein shownthe shuttle-body A as having an elongated opening -A extended and an inclined bottom a, sloping rearwardly fromabout'the usual metal cap 2 to the threaddelivcry eye, to be described, the cutting away of such part of the shuttle-body leaving a shouldered portion a at the back of the eye.

Between the rear or inner end of the wall a and the front end of the opening A is a tubular cup-like thread-guide 0, (shown separately in Fig. 5,) fitted tightly into an appropriate socket in the shuttle-body and having guide-slots c and 0 in its wall diametrically opposite each other, the slot 0 being located adjacent the wall a, Fig. 1, while the slot 0 is opposite the tip or delivery end of the filling-carrier, the shuttle-wood being cut out behind the thread-guide at (1 Figs. 1 and 4.

Referring to Figs. 4: and 5, the slot 0 is shown as having one straight side, while the other side is shaped to present a downturned hook like guard 0 which overhangs and leaves a very narrow passage between it and the opposite side of the slot. This narrow passage is the thread-entrance, and the hooked guard prevents the thread from whipping or throwing out ofthe slot after it has once been drawn thereinto. From the slot 0 the thread crosses the tubular guide 0 to the slot 0', being engaged between the slots by the tension device, to be described, the thread guide forming a part of the threading means. The shouldered portion a of the shuttle-body has secured to it a metallic plate, shaped and bent peculiarly, it having a long substantially triangular portion (Z, which may be termed the head, secured to the top ofthe part (L as by pins or rivets 5, Fig. 1. One point of the head is extended nearly to the wall a, to form a beak (V, the plate being bent down at d over the front of the part (0 as clearly shown in Figs. 2 and 3.

The shuttle-body is drilled or bored transversely at the base of the shouldered part a from the side of the body inward to the wall a, and into such transverse opening is inserted the part of the plate which forms the delivery-eye.

By reference to Figs. 2 and 3 it will be seen that the part (Z is triangular, its lower edge 6 and the longitudinal edge 7 (shown only in Fig. 1) acting to guide the thread (after it has been drawn under the beak (Z down to the delivery-eye. To form the latter, the part of the plate below the edge 6 is bent to form a partial tube (Z fitting tightly in the transverselybored part of the shuttle-body referred to. The extremity of the plate is tapered, as at (Z and it is turned down to enter a hole 8 in the part d, (see Figs. 2 and 3,) its tip pointing downward and leaving a clearance between itself and the edge of the hole 8 for the thread to pass and enter the tube or delivery-eye (Z but preventing the escape of the thread after it has entered the eye. This tapered strip (Z thus forms a guard for the delivery-eye, as will be readily understood.

In the threading operation the thread as it draws off the filling-carrier B enters the slots of the guide 0 and is drawn along the wall (a and beneath the beak (V, the shuttle moving to the right, viewing Fig. 1, or away from the battery. On the next shot of the shuttle the thread is guided by the edges 6 an d 7 down from the beak and around the tip or guard (Z into the eye (Z the threading operation then being completed, and thereafter the thread draws over the rounded edge 10 of the plate and through the eye. The thread cannot escape from the latter because the guard is hooded in the opening 8, and it cannot escape or be thrown out of the slot 0 because of the overhanging guard c therein.

1 will now describe the tension device, which is located between the guide-slots referred to and which automatically imparts a drag or tension to the thread and maintains it during the weaving. The bottom of the guide 0 has a hole 0*, Figs. 4: and 5, registering with an upright hole a in the shuttle-body, and into this latter hole is screwed a threaded stud f, having a circular head f, which fits in the guide and is rotatable therein, the head having upturned members f thereon separated by a deep groove or channel 7. (See Fig. 6.) As clearly shown in Fig. 6, the upright members or lugs f are convexed on their outer faces to fit easily within the thread-guide c, and the two side walls of the groove or channel f are formed by the opposed inner faces of the two membersf. The tops of the latter are flared, as at to widen and form an easy entrance to the groove, the bottom of the latter being very nearly on a level with the bottoms of the guide-slots c c of the threadguide when the parts are assembled.

Viewing Fig. 1, it will be manifest that if the groovef is in alinement with the guideslots it will not oppose the passage of the thread; but if the stud f be turned to set the groove at an angle to a straight line between the slots the thread will be deflected from its direct path and will draw through the groove f5 and over two upright edges of the members f, as shown in Fig. 1. The greater the angle the greater will be the deflection of the thread, and consequently the greater will be the drag or tension imparted to the thread, and it will be substantially uniform and constant during weaving.

When the thread 6, Fig. 1, is drawn into the slots 0 c in the threading operation, it is automatically directed into the groove or channel f by the flaring tops f of the members as will be manifest.

By threading the stud f it is held in place in the shuttle-body and the threadguide 0, and it can be turned to increase or decrease the tension by inserting the end of a screwdriver or similar tool into the groove f The construction is simple, strong, and durable. It effectively applies the desired tension to the thread and maintains it when applied.

While I have shown a'partieular form of threading means herein in connection with the tension device, the use of the latter is not restricted thereto, for it can be employed in connection with other forms of threading means with but slight alteration in the latter.

It is to be noted that not only does the tension device impart the requisite drag to the thread, but it also prevents any very large bunch on the filling from passing through the shuttle and entering into the cloth, and it also prevents the well-known and objectionable fault of double filling.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination in a shuttle of means to automatically thread the same, and separate means to effect automatically and maintain a deflection of the thread from a direct line in its passage through the threading means, to thereby maintain a substantially uniform tension upon the thread during weaving.

2-. The combination in a shuttle of means to automatically thread the same, and adjustable means to effect automatically and maintain a deflection of the thread from a direct line in its passage through the threading means, to thereby maintain a substantially uniform tension upon the thread during weaving.

3. The combination in a shuttle of means to automatically thread the same, and an angularly-movable device located in the path of the thread through said means, to automatically engage and deflect the thread and thereby impart and maintain substantially uniform tension thereupon during weaving.

4. An automatically-self-threading shuttle comprising threading means having guideslots for the thread, in combination with a tension device having two relatively fixed and opposed faces to receive the thread between them and arranged to deflect the thread and exert a substantially uniform drag or tension thereupon.

5. An automatically-self-threading shuttle comprising threading means provided with a thrrad-passage, in combination with a tension device having two opposed and parallel faces to receive the thread between them, and located at an angle to the path of the thread through the thread-passage.

6. An automatically-self-threading shuttle comprising a slotted thread-guide, in combination with a tension device consisting of two opposed and relatively fixed parts supported by said guide and having flared tops and arranged to deflect and to direct the thread into the groove or channel between them.

.7. An automatically-self-threading shuttle comprising a slotted thread-guide, in combination with a tension device consisting of a stud having a head provided with a threadreceiving groove or channel and rotatably supported by said guide, the angularity of the groove with relation to a direct line between the slots of the guide determining the drag to which the thread is subjected in its passage through the groove of the stud.

8. An automaticallyselfthreading loom- 1 shuttle having a side delivery-eye and an opening to receive a filling-carrier, means located between said opening and the eye to automaticallydirect the thread into the deliveryeye, and a tension device, including opposed members located at an angle to and to act upon the thread as it passes between them to the eye, to exert a drag or tension upon the thread.

9. The combination in a shuttle, of means to automatically thread the same, and a rotatably mounted tension device having a groove or channel to receive and deflect the thread from its direct path.

10. In a loom-shuttle, automatic threading means, including a circular thread-guide having a thread-receiving slot, a guard therefor,

and a diametrically opposite guide-slot, combined with a tension device mounted within the guide and adapted to impart and maintain a drag upon the thread during weaving.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES H. NORTHROP.

Vitnesses:

VICTOR MONTGOMERY, E. E. KEEOH.

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