US1563068A - Self-threading shuttle - Google Patents

Description

. Nov. 24, 1925- 63,

H. L. BONNEY SELF THREADING SHUTTLE Filed NOV- 1925' Patented Nov. 24, i925.

UNITED STATES HENRY L. BONNEY, F NORTH ANDGVER,

MASSACHUSETTS,- ASSIG-NQR OF ONE-HALF TO GEORGE GIBSON BROWN, 0F LAVIRENCE, MASSACHUSETTS.

SELF-Tl-IREADING SHUTTLE.

Application filed November To all whom it may concern Be it known that 1, Emmy L. Bonner, a citizen of the United States, a resident of North Andover, in the county 01'' Essex and State of hlassachusetts, have invented an Improvement in Self-Threading Shuttles, of which the following is a specification.

This invention relates to that class of shuttles employed in automatic looms which are threaded automatically when the bobbin is inserted, the threading action being partly performed on the first pick and finished on the second.

in shuttles of this character, .it is not only necessary that on the first pick the thread shall be drawn into the threading slot into such a position that the threading operation will be completed on the second pick, but it is also usually necessary to provide means to retain the thread in the threading slot in such a position, during the time in which the shuttle is in the shuttle box between the first and second pick, that the operation will be completed.

Unthreading at the end of the first pick, or beginning of the second, is principally due to the kinking of hard twisted thread when is becomes slack at the end of the' flight 0f the shuttle, and in case it should 3 pass back around the thread retaining means, the shuttle will become completely unthreaded as it passes from the shuttle box, at the beginning of the second pick.

tine of the objects of my invention is to provide an automatically threading shuttle in which the drawing of the thread into the threading slot past the thread retaining beak, whichis usually employed, will be insured by the straight pull on the thread due to the action of the first pick, and in which the possibility of unthreading by the kinking or thrashing about of the thread, after it has been drawn past the beak at the end of the first pick, will be obviated.

in shuttlesoit' this cl'laracter, it has been the usual practice to locate the tension device in the throat of the shuttle, or at the point where the thread leaves the bobbin chamber, the most common form of tension device in use being a piece of felt over which the thread is drawn. An objection to this arrangement is that the thread. is likely to balloon or swing about the center line of the bobbin asan axis, as it is drawn from the bobbin and a result the tension 6, 1923. Serial No. 873,683.

action of the felt, when located in the position above described, is variable, or too great at sometimes and too small at others.

A further object of my invention is to provide a tension device which is so located and arranged that its action will not be affected by, the ballooning of the thread, so that a practically constant tension will be maintained on the thread at all times, and in this connection, another object of the invention is to provide an improved means or manner of securing the tensioning means in position, so that the expense of manufacture may be reduced.

I accomplish these objects by means of the construction hereinafter described and shown in the accompanying drawings, in which:

Fig. 1 is a top plan view of the thread delivery end portion of a self threading shuttle embodying my invention.

Fig. 2 is a central longitudinal vertical section thereof on line aa of Fig. 1.

Fig. 3 is a horizontal section on line 6 Z- of Fig. 2.

Fig. 4: is a similar vlew at line 0 c of Fig. 2.

Fig. 5 is a perspective view of the thread delivery end of the shuttle.

Figs. 6 and 7 are, respectively a side elevation, partly in section, and a bottom plan view of the threadingblock.

As shown in the drawing, the shuttle body 2 is provided with a cylindrical throat or )assage which is in central longitudinal alignment with the longitudinal center line of the bobbin 3, said passage being flared at its outer end. The wood of the shuttle has a longitudinal slot 4 which leads to said passage, the sides of the slot being oppositely beveled at their upper ends to form inclined faces 5 and 6 to guide the thread. into the slot as it is drawn forwardly. The Wood of the shuttle is also recessed from its upper side to receive the metal threading block, which comprises a somewhat circularly shaped shank 7, having an outwardly flaring or inverted trunco-conical shaped head portion 8 from one side of which the beak 9 projects horizontally the edges 10 and 11 01 said beak being tangentially arranged with relation to the circular upper edge of the head portion and converging to its end. The edge 10 of the beak extends approximately parallel to, but in ll) ing a new piece into therecess times, so that a suitable drag or tension will be constantly placed on the thread, which will in no way be affected by the ballooning or thrashing of the thread. When the threader block is in position, the felt 23 will be securely held against displacement, but when it becomes necessary to renew the felt, this may be readily done by removing the block, picking out the old piece and pushbehind the post Q the latter thus serving as a retaining means for the felt, as well as a thread guide. in practice the post 21 will be of porcelain if the shuttle is used for worsted and of metal if it is used for cotton.

The above described construction is less expensive to manufacture than many shuttles of this general type, as the threader block is a simple casting and the chamber which receives it may be largely made by boring.

I claim:

1. A self-threading shuttle having a slot ted side-delivery eye and a thread passage leading longitudinally from the bobbin chamber and transversely to said eye, a threading block disposed in the rear of the transverse portion of the passage and comprising an upright shank having a horizontally projecting beak at its upper end, a thread guide post mounted in the lower end of said shank at the vertex of the angle between said passage portions to cause the thread to be drawn against said post as it is drawn to said eye, said shank being recessed in the rear of the thread ei'igaged portion of the post and having thread tensioning material inserted therein and erq 'ending into the line of the thread as it is drawn about the post to engage the thread before and after it is drawn past the same and cause a drag on thereon at each point of en gagcni on t.

A self-ti)reading shuttle having a sidedolivcry eye and a th read passage extending lmigitiuliimlly thereof from the bobbin chamber and transversely to said eye, a threading block having a vertically disposed shank mounted in the shuttle in the rear of the transverse portion of said passage and having a socket extending upwardly therein from its lower end, a thread guide post mounted in said socket at the vertex of the angle of said passage in position to cause the thread to be drawn against the same as it is drawn from the eye, said post extending to the lower end of said shank and said shank being recessed in the rear of the lower portion of said post and having a tension felt held in said recess by said post and arranged to project at each side thereof in position to cause the thread to be drawn against each projecting portion of the felt, as it is drawn against the post.

3. A self-threading shuttle having a sidedelivery eye and a thread passage leading longitudinally from the bobbin chamber and transversely to said eye, a threading block mounted in the shuttle in the rear of the transverse portion of said passage, a vertical thread-guide post mounted at its upper end in said block and depending to the bottom of said passage at the vertex of the angle therein in position to cause the thread to be drawn thereagainst as it is drawn to the shuttle eye, said block being recessed in the rear of the thread guiding portion of said post and having a tension felt held therein in position to project at each side of the post into engagement with the thread as it is drawn against the post in its passage to the eye.

t. A self-threading shuttle having a side delivery eye, a threader block chamber and a thread passage leading longitudinally thereto and transversely therefrom to said eye, a th reader block comprising an upright shank having a horizontally projecting beak and means for securing the same in said chamber with the lower end of its shank engaged with the bottom thereof, said shank having a recess in its front side extending upward from its lower end and a socket therein extending upward from the bottom of said recess, a thread guide post mounted in said socket and extending into engagement with the bottom of said chamher in position to cause the thread to be drawn against the same and bent sharply as it is drawn to the shuttle eye, and a tension felt inserted in said recess about the post and clam pcd between the same and the sides and bottom. of the recess and the bottom of the thread block chamber, said felt being :n'ranged to project beyond the sides of the shank into positions in which the thread will be drawn thereagainst at both sides of the post as it is drawn against the post.

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

HENRY L. BONNEY.

III

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