US1909262A - Shuttle - Google Patents

Description

y 1933. E. E. FULLER 1,909,262

SHUTTLE Filed Feb. 5, 1931 I "f i,

Patented May 16, 1933 PATENT OFFICE i EMIL E. FULLER, or wooNsocKEr, RHODE ISLAND, AssrqnoR TO SHAMIBQW sHU'r'rnE 1 COMPANY, or WOONSOCKET, RHODE] ISLAND, A CORIEOBATION or RHODE ISLAND SHUTTLE Application filed l'sebruary 5, 1931 Serial No. 513,541.

the preferred form of the invention, Fig. 1

is a plan of the right-hand end of a weft replenishing loom shuttle; in Fig. 2 is shown a medial sectional elevation of the thread block and shuttle; Fig. 3 is a front elevation of the shuttle block removed from the shuttle; Fig. 4 is an elevation-of the thread tension viewed from the left-hand end of the thread block; Fig. 5 is a plan of the tension device. and a portion of the thread block; and Fig. 6 is a plan view of a modified block and tension device.

' Thepreferred form of the invention is de-. scribed as follows: The shuttlebody 10 is of the usual form and carries the usual bobbin 11 and is provided with a thread block 12. The thread block has a longitudinal thread passage 13 and a thread entering passage 14. At the left-handend of the threadblock is a tension device indicatedgenerally by'the reference character 15. The thread block'is provided with a leader 16, which operates to effect delivery of the yarn from the shuttle in case the yarn does not find itsv way down to the delivery eye 17 of the shuttleon the first pick afterreplenishment. The thread block is or may be of the usual form.

The tension device 15 is located at the lefthand or inner end of the threadblock and comprises two pairs of tension-applying members or tension levers. These are shown in large scale in Figs. 4 and 5. One pair of tension levers comprises the tension member 18 and the spring-pressed tension member 19. The latter member is pivoted on a vertical axis and is pressed toward the other tension member 18 by a coil spring 20. The first tension, member 18 is similarly pivoted,

but issupported by a pin 21 so that the yarn engages'a portion or occupies'a position on the axial line of the thread passage. The yarnengaging portions of these two tension members are at their ends, and are straight and arranged vertically at the inner end of the thread block, and the yarn on the first pick of.

the shuttle from the weft replenishing side of the loom enters the wedge-shaped space 22 formed by the tension members, and then moves down in between their" yarn-engaging portions. On this first pick of the shuttle away from the weft-replenishing side of the loom the yarn occupies at the beginning of the pick the position approximately illustrated at 23 in Fig. 2, so that onthe beginning of the movement of theshuttle the yarn immediately enters the tension device,

whic-h'thereupon begins to apply tension to it, so that as the yarn is paid off from the shuttle on the first pick, it is under tension.

It sometimes happens that, on the first pick, the yarn does not pass down into the thread eye 17, and then on the next pick the return pick the yarn is paid off from the leader 16, but the leader, extending a short distance down into the entering pas sage,-holds the yarn so that it cannot escape from the tension device and tensionis applied by the device to the yarn when it is pay-' ing off from the leader. On the next pick,

that is, the second pick away from the weft replenishing mechanism, ordinarily the yarn of the leader so that if on the first, or a subsequent, pick after replenishment the yarn does not find itsway-d'own to the delivery eye when it is paid off from the'leader, still ten-' sion is applied to the yarn and it is laid props erly in the shed. The long bite of the'tension device affords application of tension on the beginning of the entrance of the yarn into the thread block, and by pressing on the yarn as it enters, and continuously thereafter as it 100 gradually finds its way down into the final thread passage 13. The tension device is durable because of the long bite, considerable portions of which are used in the operation of threading and Weaving.

A second pair of tension members 24 and 25 is provided, of which the tension member 25 is pivoted on a vertical axis at 26, and the other tension member pivoted on a vertical axis at 27, similar to the vertical axes of the tension members 18- and 19. A similar stop pin 28 is provided for the tension member 24. It will be observed that the two springpressed members 19 and 25 are located upon opposite sides of the yarn path and press in opposite directions toward the other tension members 18 and 24. The stop pins 21 and 28 are so located in the thread block that they support the tension members 18 and 24 in proper position to cooperate with the op posed spring-pressed tension members 19 and 25, respectively, to engage the yarn on the vertical axial plane of the shuttle so that they keep the yarn straight in its proper position in the thread block.

The beak 29- of the thread block is located on a slightly lower level than the leader 16 so that whent-he yarn passes by the beak it finds its way directly to the delivery eye 17 of the shuttle, and cannot thereafter escape and dethread itself, and whereas if the yarn on the first pick after replenishment does not pass below thelbeak, it may onthe next pick be delivered from the leader 16, but always under tension.

The construction shown in Fig. 6 is somewhat simpler than that described above and accomplishes a similar result. The shuttleis similar in form and carries the thread block 4O which is in general similar to the block 12, having the usual beak, leader, and other parts. The tension device comprises a single pair of curved tension levers 42 similar to the levers 19. The levers 42 are pivoted on vertical pins 44 and are springpressed toward each other by springs 46. The curved levers 42 are of a height to terminate just below the top of the block, so that the thread enters on the first pick after replenish-ment.

The construction of Fig. 6 does not pro- Vide for positive centering of the levers, as does the construction of the other figures. The tension of the thread, however, provides sufficient centering action. 7

It will be observed that in either form of the invention, the thread is drawn into the tension members on the first pick of the shut tle after replenishment. This feature is of particular importance in weaving with silk or rayon.

Having thus described the invention, what is claimed is:

1. A weft replenishing loom shuttle having, in combination, a shuttle body having a delivery eye, a thread block having a leader, a longitudinal thread passage and guiding walls and surfaces for guiding the yarn into the passage and eye, and a tension device located at the inner end of the thread passage comprising a pair of tension members pivoted outside of the passage and having thread engaging portions projected into the passage, said tension members being spring-pressed to swing its thread-engaging portion toward the other tension member, the latter being supported in stationary position with its thread-engaging surface at the axial plane of the shuttle, the thread-engaging portions of the tension members being arranged vertical-1y extending downwardly from a level above the leader and acting to guide the yarn downwardly at the inner end of the thread pass-age in the vertical plane of the axis of the thread passage and acting to apply tension to the yarn as the shuttle starts its first pick away from the weft replenishing side of the loom.

2. A weft replenishing loom shuttle having, in combination, a shuttle body having-a delivery eye, a thread block having a longitudinal thread passage and guiding walls and surfaces for guiding the yarn into the passage and eye, the thread block being providedwith a leader for preventing dethreading if the yarn fails to reach the shuttle eye on the first pick of the shuttle after replenishment, and a vertical thread tension located at the inner end of the thread passage, the bite of the tension extending upwardly above the level of the yarn after it has passed below the leader to apply tension to the yarn during delivery of thread by the shuttle from the leader.

3. A weft replenishing loom shuttle having, in combination, a shuttle body having a delivery eye, a thread block having a longitudinal thread passage and guiding walls and surfaces for guiding the yarn into the assage and eye, and a tension device located at the inner end of the thread passage comprising two pairs of pivoted cooperating tension members each pair having a vertical bite located in the vertical axial plane of the shuttle, one of the tension members ofeach pair having a stop against which such tension member is pressed by the other tension member to exert spring pressure to apply tension to the yarn as it draws off of the bobbin.

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

EMIL E. FULLER.

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