US692801A - Self-threading loom-shuttle. - Google Patents

Description

No. 692,80l. Patented Feb. 4, |9132.v

' E. S..STIMPSON.

SELF THBEADING LUDM SHUTTLE.

(Application lmea out. v, 1901.)

(m5 Model.)

UNITED STATES LPATENT OFFICE,

EDWARD S. STIMPSON, OF I-IOPEDALE, MASSAOHSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE. l

SELF-TH READING LOOM-SHUTTLE.

SPECIFICATION forming part of Letters Patent-No. 692,801, dated February 4, 1902.

Application iiled October 7, 1901. Serial No. 77,852. (No model.)

To all whom, t may concern:

Be it known that I, EDWARD S. STIMPsoN, a citizen of the United States, and a resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Self-Threading Loom-Shuttles, of which the is automatically directed to a delivery-eye after a fresh illing-carrier has been inserted automatically in the shuttle to take-the place of the filling-carrier ,previously-held therein.

Various automatically self-threading shuttles have been devised which are successful in practice in so far as the threading operation is concerned; but considerable trouble has been experienced by a bight or loopV of the thread formed between the lling-carrier and the inner end of the threading device throwing and catching upon either the point or beak of the head overhanging the horn or some other part ofthe threading device. This looping of the thread is caused by the sudden stoppage of the shuttle in the shuttle-box and too rapid delivery of the thread from the lling-carrier, the slack forming aloop, which is thrown out toward the point of the shuttle.` Sometimes the shuttle will for this reason be unthreaded; but more often the loop catches and the thread will be broken just as soon as the flight of the shuttle exerts suficient tension on the thread t0 draw the loop taut around the obstruction.

My present invention has for its object the production of a shuttle of the type referred to provi-ded with means for preventing the loop of thread, .if formed, from catching and causing breakage of filling, the novel threading device forming the-subject-matter-of this invention facilitating the automatic Selfthreading of Ythe shuttle and being very simple inconstruction and eectivein operation..

l Figure lis a top or plan view of a loom-shuttle embodying one form of my invention, a filling-carrier being shown in place and the the threading device.

The threading-block (shown separately in Fig. 3) comprises vtwo parallel longitudinal side walls d d', connected at their bases at (ZX and having at their inner ends a .transverse connecting-wall d2, extended laterally to form upright ears d3, which itinto pockets 2 in the shuttle-body, Fig. 1, toassist-in positioning the block. The greater portion of the wall d is reduced in height, as at d4, and a trough or open longitudinal passage d5 is formed between the walls at their base, said passage forminga forward continuation of a tubular opening or inlet d6 in the wall d2, the part d5 and said inlet constituting the thread-passage in which the thread'travels from the filling-carrier to the delivery-eye. Above the inlet the wall d2 is recessed from'its top downward in continuation of the inner faces ofthe walls cl d' to form a wide thread-entrance d?,

which communicates at its bottom with the inlet by a narrow longitudinal slot d8, and a downturned curvedguard g is extended from ator near the top of said entrance overhanging the slot d8. The guard projects from the side wall d', and its lower edge approaches closely the opposite face of the thread-entrance, said face being preferably beveled'or convexed at its top, as clearly shown at 30 in Figs. 2 and 3, and the narrow slot d8 is inclined toward the wall d' for a purpose to be described. The front edge of the wall d' is lupwardly andforwardly inclined to constitute a horn di), and

a dat substantially triangular head d10 is 15, (see dotted lines, Fig. 2,) extended throughV a transverse hole S in the block Abelow the thread-passage.

When the filling-carrier is inserted in the shuttle, the free end of the thread t is held fast, and when the shuttle is thrown to the left, viewing Fig. l, the thread draws off over the tip of the filling-carrier and is drawn down across the edge Z13 of the head and enters the thread-entrance (Z7, passing down between the convex face of the guard g and the opposite face of the said entrance and underneath the lower edge of thev guard. At about this time the thread will have also been shed from the head, the edge d13 being preferably beveled at C115, adjacent the shoulder d, to facilitate the shedding of the thread over said edge, and the thread passes under the head and between the spur CP2 and the recessed portion 5 of the shuttle-body ready to completely enter the thread passage. After the thread passes under the guard g it is drawn down by its tension through the slot d8 into the tubular inlet d and thenis well in its proper position in the open and tubular parts of said thread-passage. On the next throw of the shuttle to the right the thread is guided by the horn d to the delivery-eye ax, and the shuttle is thus threaded, the thread being delivel-ed thereafter from the delivery-eye.

The rotative movement of the thread as it is drawn from the filling-carrier is from right to left, viewing Fig. 2, so that the opposite inclination of the slot d8 tends to prevent the thread from iiying up or slipping out from the inlet d through said slot; but if it should pass therethrough the inclination of the slot directs it into the pocket formed by the guard g, and the concave face thereof immediately directs the "thread back. through the slot into the thread-passage.

Should a loop of thread be thrown out and forward,it will fall over the guard g and thence into the long open space between the threadentrance and the head and will be drawn into said entrance as soon as tightened by the flight of the shuttle without being caught and broken.

The point of the head is so far removed from the rear end of the threading device that it is a practical impossibility for a loop of thread to catch on the point.

By cutting away and reducing the height of the wall cl, as described, the space forward of the thread-entrance and above the open part d5 of the thread-passage is made larger and readier of access by a thread-loop, the diagonal edge (Z13 of the head also assisting to direct a loop into such space.

I prefer to make a slight concavity 40 in tho rear edge of the guard g, near the top thereof,

`to direct a loop of thread over toward the Wall cl when thrown out, so that the guard will stop further forward movement thereof, said concavity also acting to temporarily hold the thread during the threading operation until the shuttle is thrown well out of the shuttleboX, so that the thread will not have a tcndency to enter the thread-entrance too soon to clear the picker.

In practice the threading device operates accurately and surely, positively prevents breakage of the thread due to looping and catching, as there is nothing for the loop to catch upon, and unthreading is most eiifectually obviated, while the general shape of the block reduces very materially the necessary cutting away of the shuttle-body to receive it.

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

l. In an automatically self-threading shut-a tle, a block having in its base a longitudinal thread-passage having a short tubular portion at its rear end, a thread-entrance above said portion and communicating therewith by an inclined, narrow slot, a downturned guard in the entrance overhanging the slot, the inclination of the latter being toward the pocket formed by the guard, and a horn the head of which extends over the front end of the thread-passage, the back of the head being at a distance from the thread-entrance and leaving an open space between them.

2. In an automatically self-threading shuttle, a block having in its base a longitudinal thread-passage having a short tubular portion at its rear end, a thread-entrance above said portion and communicating therewith by a narrow slot, a downturned guard in the entrance overhanging the slot, and a horn the head of which extends over the front, open portion. of the thread-passage, the back of the head constituting a shoulder extended laterally in front of and at a distance from the guard.

` 3. In an automatically self-threading shuttle, a block having longitudinal parallel side Walls one of which is higher than the other and having its front end inclined to constitute a horn, an overhanging head on said wall above the horn, a transverse connecting-wall at the rear end of said side walls and having a tubular longitudinal opening therein constituting the inlet end of the thread-passage, a thread entrance in said transverse Wall above and communicating at its bottom with the tubular opening by a narrow slot, and a downturned guard in said entrance, mounted on the high side wall and overhanging the slot, the front end of. the thread-passage lead- IOO ing from the tubular opening'and extending between the side walls at theV lower-'portiony thereof tothe horn.

4. In an automatically self-threading shnt,

tle, la long, longitudinal thread-passage open for the greater partV of its length and having; a tubular inlet at its inner end, a wide thread.`

entrance abovesaid tubularinlet and communicating therewith by a narrow slot, a guard in said entrance overhanging the slot,

and a horn having its head overhanging ther front open end of thethread-passage and leaving an unobstructed opening -between the back of the head and the thread-entrance.

5. In an automatically self-threading shut tle, a long, longitudinal thread-passage open for the greater part of its length and having a tubular inlet at its inner end, a wide threadf entrance above said vtubular inlet and com;

municating therewith by a narrow slot, a`

guard insaid entrance overhan'gingthe slot,y

and a horn having its head overhangingthej front Open end ofthe thread-passage,the inev ner edge of the'head being diagonally extended across the said passage and 'leavingan unobstructed opening between the thread-entrance andthe point of the head.

6. In an automatically self-threadingfshuttlc-,a long,v longitudinal thread-passage open for the greater partof its lengt-h and i-havin g la tubular inlet at its inner end, a wide thread-y entrance above said tubular inlet and=com.

municating therewith by a narrow slot, a

guard in said entrance overhanging the slot; and a horn havingits head overhanging the Y front open end ofthe thread-passage, the back of the headpresenting a transverse shoulder in front of the threadfe'ntrance and separated therefrom by an unobstructed opening. 1 v 7. In an automatically self-threading shuttle, a long, longitudinal thread-passage open forithe greater part'of its length and having a tubular inlet at its inner end, a wide threadentrance above said tubular inlet and communicating therewith by a narrow slot, a guard in said entrance overhanging the slot, and a horn having its head overhanging the front open end of the thread-passage," the inner edge of the `head being extended rearward from its tip diagonally to the transverse hack of thethead and beveled adjacent the back,-I to vshed the'thread from the top of the head.-

Inl-testimony: whereofI have signedv my name to this specification in the presence oftwo'subscribing witnesses. l ,Y

.'iglDvwARDs;sT1MPso1fI--.v 1

Witnesses: t. f Y' .GEORGE -OTIs "DRAPER,

v ERNEST'W; Woona

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