US1466849A - Self-threading shuttle - Google Patents

Description

Sept. 4, 1923. 1,466,849 J. NORTHROP S ELF THHEADING SHUTTLE Filed Aug. 11, 1919 Patented Sept. 4, 1923.

UNITED STATES PATENT OFFICE.

JONAS NORTHROP, 0F HOPEDALE, MASSACHUSETTS, ASSIGNOR T0 HOPEDA LE MANU- FACTURING COMPANY, OF MILFORD, MASSACHUSETTS, A CORPORATION OF MAS- SACHUSET'I'Sv snrrrnnnanmc sHU'T'rLE.

Application filed August 11, 1919. Serial No. 316,547.

To all whom it may concern:

Be it known that I, JONAS Nonrnnor, a citizen of the United States, residing at Hopedale, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Self- Threading Shuttles; and I do hereb declare the following to be a full, clear, and exact description of-the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to an improvement in self-threading shuttles for weft replenishing looms and more particularly to an improvement in thread blocks for such shuttles. 0

Self-threading shuttles as now constructed are usually provided with a longitudinal thread passage and with guiding means including a shield and beak by which the thread is guided during the threading operation into the delivery eye of the shuttle. In such seIf-threadin shuttles it is highly desirable that the threading operation be completed as soon after replenishment as possible and in most of the self-threading shuttles now in use, the threading operation is usually completed during the first two picks of the shuttle after replenishment. In some instances, however, the irregularities in the course of the thread as it unwindsfrom the bobbin and passes over the top of the thread block during the first pick of the shuttle after replenishment prevent the thread from successfully passing under the shield and over the beak, the result being that the shuttle wilf not be threaded until the third and fourth picks thereof, instead of upon the first and second.

The object of the present invention is to provide a thread block forrself threading shuttles in which the course of the thread is so directed during the firstt'portion of the threading operation as to insure passage of the thread under the shield and over the beak during the first pick of the shuttle after replenishment.

To this end a thread block is provided with a thread positioning device intermediate the guiding means and the bobbin which is arranged to engage tbcthread and control its course of movement from the b'qbbin to the guiding means so that it will pass through said guiding means during the first pick of the shuttle after replenishment.

With the above object in view, the invention consists inthe thread block hereinafter described in the claims.

In the drawings illustrating the invention as embodied in a shuttle adapted for use in a right hand loom and with a right hand wind of bobbin, Figure 1 is a perspective of a portion of a shuttle showing the improved thread block; Fig. 2 a plan view; and Figs. 3 and 4 sections on lines 3-3 and 44 respectively of Fig. 2.

The self-threading shuttle illustrated in the drawings is described as follows: The shuttle body 10 is provided with tlie usual opening 11 for the reception of the bobbin or filling carrier 12. The shuttle body 10 is provided with a delivery eye 13 located in the front wall thereof, and the filling or thread is led from the bobbin 12 into and through the delivery eye 13 by the improved thread block, indicated generally by the reference character 14. The thread block 14 is received in a recess formed in the delivery end of the shuttle and is held therein by a threaded bolt 15 and nut 16. The thread block 14 is provided with the usual longitudinal thread passage 17 and with a shield 18, which overla s a beak 19. A felt pad 20 is located at t 1e inner end of the bottom of the longitudinal thread passage and serves to maintain an even tension on the thread. 'The construction and function of the parts thus far described are well known and form alone no part of the invention.

.The thread block 14 is provided at the inner end with a thread positionin device 25 which is described as follows: he rear wall 27'of the longitudinal thread passage 17 is provided with aguide plate 26 which is curved downwardly and inwardly to near the inner end of the front wall 28 of the thread passage, and terminates in a down- Wardly and inwardly extended hook 30. A,

. causes the same hook 30 at 9,

also forms an 'inlet 36 with the face of the front wall 28 of the thread passage 17 permitting the thread to pass around and below the hook 35. The upper surface of the hook 35 is substantially horizontal and forms a bearing surface upon which the thread may run durin the initial portion of the thread ing operation, and the point of the hook 35 is extended forwardly.

The inner end of the top surface of the plate 26, in addition to being curved. downwardlyand forwardly toward the hook 30, also extends in a gradual outward curve from the top of the rear wall of the shuttle bod 10 toward the tip of the book 30 thereby filming the flaring mouth 38 which tends to direct the filling inlet opening 29 and book 30.

In operation, when a fresh bobbin is 1n sorted in the shuttle after replenishment the thread extends from the bobbin diagonally across the thread block as indicated in Fig. 2, bein fastened at'its free end to the hopper stu of.the loom. After the lay starts on its backward beat the rearward movement-of theshuttle with the lay causes the thread to be moved diagonally toward the flaring mouth 38 so that as the lay continues to beat back, the thread is moved into and through the around and under the directly into the mouth 38 and the natural unwinding of the thread from the bobbin to enter and pass through the narrow inlet 29 around and under the end of the book 30 where it rests u on the upper surface of the lower hook 35. y this time the shuttle has started on its first pick and the thread being confined by the-upper point below the top of the inner end of the thread block, its course of movement toward the shield and beak is so controlled that it readily passes under the shield an over the beak beforethe shuttle has oomleted its travel to the other side of the loom. Elpon the return pick of the shuttle, the thread is conducted in the usual way to the delivery eye and passes through the second inlet into the space below the second hook 35 in which position it continues during the nor al operation of the loom.

e important features of the invention resides in the utilization of the relative movement ofthe thread across the shuttle when the lay starts beat backward a'fter replenishment in order to assist in the threading operation of the shuttle and also in the provision of means fon directing and controlling the course of the thread from the bobbin to the shield and beak during the initial portion of the threading operation so that the passage of the thread under the shield and over the beak is insured during the first pick of the shuttle after replenishment Having thus de cribed the preferred embodiment of the invention it will be understood that the same may be embodied in other forms within the scope oi the following claims:

1. A thread block for self-threadin shuttles having, in combination, a longitudinal thread passage. means for guiding the thread to the delivery rye of the shuttle, and a thread positioning device extended transversely of the mouth of the thread passage adapted to engage the thread upon the first rearward beat of the lay after replenishment and before the shuttle has started acrossthe lay, and to control its courseof movement from the bobbin to the guiding means so as to insure passage of the thread between said guiding means on the first pick of the shuttle after replenishinent.

2. A threadblock for self-threading shuttles having, in combination, -a longitudinal thread passage, means for guidin the thread to the delivery eye of the shuttle, and a thread positioning device at the inner end of the thread block in such position with relation to the new filling thread as to engage it as the lay beats rearwardly and before it has reached a position to pass between said guiding means, and to thereafter control the course of its movements to insure the passage of the thread between said guiding means on the first pick of the shuttle after replenishment, said thread positioning device comprising a plate extended inwardly and downwardly from one Wall of the thread passage transversely thereof to within a short distance of the innor end of the other wall of the thread passage and having its free end formed into a depending book.

3. A thread block for self-threadin shuttles having, in combination, a longitu-' dinal thread passage, means for guiding the thread to the delivery eye of the shuttle, means for maintaining the thread within the thread passage during normal operation of the shuttle, and a positioning device extended transversely -of the inner end of the thread passage and adapted to engage the new filling thread upon the first Is'tlI'Wfl-ld beat of the lay after replenishment in a manner to insure engagement of the thread by the said guiding means upon the first pick of the shuttle.

4. A thread block for self-threadin shuttles having, in combination a l0ngitud1- nal thread passage, means for guiding the thread to the delivery eye of the shuttle, a hook extended transversely of the inner end of the thread passage to retain the thread within the passage, and a positioning device consisting of a hook extended across the top of the mouth of the thread pa$age and having a substantially horizontal upper surface, said positioning device being adapted to engage the thread upon the first rearward beat of the lay after replenishment to insure engagement of the thread by the iding means upon the first pick of the s uttle.

5. A thread block for self-threading shuttles having, inteombination, a longitudinal thread passage, means for guiding the thread to the delivery eye of the shuttle, and a thread positioning device extended across the inner end of the thread passage and provided with a substantially horizontal upper surface, said positionlng' deviee being adapted to engage the new filling thread upon the first rearward beat of the lay after replenishment and to thereafter hold the thread to insure passage of the thread through the guiding means upon the first pick of the shuttle.

6. A thread block for self-thremling shuttles having. in combination a longim dine] thread passage, means for guiding the thread tn the delivery eye of llushuttle, and a thread positioning llevh'e extended from thereinwall of the thread pa sage across the inner end of the threml passage to the front wall thereof, said positioning device being adapted to engage the new fill" iug thread upon the first rem-11rd heat of the lay after replenishment and to thoroilFtt'l hold the thread to insure passage of the thread through the guiding means upon the first pick of the shuttle.

JONAS NURTHRUP.

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