US1482808A - A coepobation of - Google Patents

Description

Feb. 5 1924.- 1,482,808

J. NORTHROP THREAD immune uacmmrsu fjwzzm Patented Feb. 5, 1924.

UNITED STATES 1,482,808 PATENT OFFICE.

FACTURING COMPANY, OF MILFORD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

THREAD-PARTING MECHANISM.

To all whom it may concern Be it known that I, JoNAs NoRTHRoP, 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 Thread-Parting Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to an improvement in thread parting mechanism for weft replenishing looms. The object of the invention is to produce an improved thread parting mechanism for looms operating when thefilling on the bobbin orfilling carrier has been exhausted to a predetermined extent and the bobbin is about to be ejected from the shuttle to sever it near the shuttle. The parting devices forming the subject of this invention are mounted on the shuttle feelerand operated by connections with the weft replenishing mechanism, and while of such construction and arrangement as to be adapted for embodiment in new looms, are particularly adapted for application to old looms, and to these ends the invention consists in the mechanism hereinafter described and claimed. 1

In some aspects the present invention is an improvement on the construction illustrated in the application of Jonas Northrop, filed February 25, 1919, Serial No. 279,096 to which by permission, reference may be had.

In the accompanying drawings illustrating the preferred embodiment of the invention, Figure 1 is a side elevation of the hopper and associated parts of a weft replenishing loom showing the application of the thread parting mechanism thereto; Figure 2 is a side elevation similar to Fig. 1, showing the parts in position after replenishment has been indicated, and'when the cutter is about to begin the cutting movements which will result in cutting the thread; and Figure 31s a plan of the same with the parts in the position illustrated in Fig. 2.

In the illustrated embodiment of the invention, the improved thread parting mechanism is shown as mounted upon a feelercontrolled weft replenishing loom. The parts of the weft replenishing mechanism necessary for the operation of the thread parting mechanism consist of the hopper 10 mounted on the bracket 11 secured to the breast beam 12; the hopper arm .13 .is mounted upon a rock shaft 14, called a change shaft, which extends along the front side of the loom and is connected at the other end with the filling feeler mechanism. Mounted upon the transferrer stud 15 is an arm 16 connected by means of the link 17 with the shuttle feeler 18, which is mounted upon a stud 19 secured to the hopper plate 10. The shuttle feeler 18 operates in the usual manner. When afresh supply of filling is to be inserted in the shuttle, the hopper arm 13 moves from the position shown in Fig. 1 to the position shown in Fig. 2, drawing with it the arm 16 to which it is connected by means of the spring 20, and thereupon the shuttle feeler is swung rlearwardly or toward the left, as shown in The thread parting mechanism is mounted upon the shuttle feeler, and when the change of filling has been indicated and the lay 22 moves forward with the shuttle 23 correctly boxed, the thread parting means is actuated to sever and hold the old filling extending from the selvage to the shuttle. The thread parting means comprises a movable knife and associated parts for supporting it in position on the shuttle feeler, means for open ing the knife when replenishing is indicated, mounted on the transferrer stud 15 and actuated from the hopper arm 13, and aparter actuating device mounted on the lay adapted to cause the knife to sever and hold the thread.

The parting and holdingmeans and the actuating devices therefor are described as follows The lower end 30 of the shuttle feeler 18 carries the knife 31 pivoted on a pin 36. A bolt 32 passes through the slot 73 in the knife 31, whereby the knife is free to be swung upon its pivot 36. The knife has a cutting edge at 33 which cooperates with a steel cutting plate 34 received in a re- JONAS NOR'IHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO HOPEDALE MANU- head of the bolt 32 and the plate 35 so as to press the knife holding plate with spring pressure against the knife. It will thus be seen that the knife 31 is yieldingly held between the side of the feeler arm and the knife holding plate 35 by the resilient pressure of the spring washer 41, and that while the knife may be moved easily under such pressure, the latter is sufficient to hold the knife to any given position towhich it may be moved. The upper end of the knife 31 carries a strikerblock 50 which is rigidly secured tothe knife, the knife end being received in a recess in the block 50, as shown in plan in Fig. 3. From the frontside of the striker block 50 a projection 51 extends which is adapted to be engaged by.

the knife opening evire hereinafter referred to. The block 50 is adapted to be struck by the knife actuating tappet 52, adjustably mounted by means of the screw 53 and the slot 55 on the shuttle box top 54. When the knife is actuated by theengagement of the tappet 52 with the knife block 50 to cause the knife to sever the thread, the thread is nipped between the knife blade 33 and the knife holding plate 35.

The knife opening device consists of the lever 60 pivotally mounted at 61 on a projection 62 of the socket piece 63, which is securedby means of the set screw 64: 011 theend of the transferrer stud 15, the knife opening lever 60 being held in position on i the pivot pin .62by means of a cotter pin.

The boss 65, which receives the set screw 64, acts as astop for the lever 60. Above the boss a projection 66 from the lever 60 which is adapted to engage the upper side of the boss, and the lever itself has an offset portion below the boss which is adapted to engage the under side thereof to limit upward movements of the lever. The rear end, that is, the depending end, of theiknife opening lever 60 is adapted to engage the projection 51 mounted on the strike block 50, and by pressing against such projection, to throw the knife from the position shown in Fig. 1 tothe position shown in Fig.2. The forward end of the knife open ing lever 60 is offset, as shown in Fig. 3, in a direction to be engaged by a by-pass pawl 67 pivotally mounted (at-68 on a pin projected from the side of the head piece 76 secured upon the upper end of the hopper arm 13, and held on the pin by a cotter pin. This .by-pass pawl 67, in the normal operation of the loom, occupies the position shown in Fig. 1, resting against a stop 69.

Upon forward movement of the hopper arm 13, the end of the pawl 67, which is thickened and thereby weighted so as to normally hold it in the position shown, engages the front end of the lever 60 and tilts such lever about its pivot to cause it to open the knife 31. WVhen the hopper arm moves rearwardly after the replenishing operation, the bypass pawl 67 rides'up over the end of the knife opening lever 60 and back into the position shownin F .ig. l. M

.VVhen the hopper arm is moved to the right to the position shown in Fig.2, the knife opening lever 60 operates to move the knife from the closed position shown in Fig. 1 to the open position shown in Fig. 2, be fore the lower end of the shuttle feeler is moved beyond the range of action of the lever 60. At the sa-n'ie time the shuttle feeler is rocked throughthe medium of the link 17 and turned upon its pivot from the position shown in Fig. 1 to the position shown in Fig.2. Thenas' the lay beats up the yarn extending from the selvage, the filling enters the open mouth of the knife, and at the extremity of the beat the tappet 52 strikes the knife block 50 and actuates the latter to cause it to cut the yarn. As the yarn is cut the end. extending to the selvage is gripped between the side of the knife and the knife holding plate 35, so as thereby to hold the yarn extending'from the cutter to the selvage. On the back stroke of the hopper arm, the knife opening lever being in the position shown in Fig. 2 is not engaged by the projection 51 on the knife block 50, leaving the knife in its closed position ready for a repetition of the operations. It will thus be observed that the knife is positively opened by the knife opening device, regardless of the exact position of movement of the shuttle feeler or of the tension of the actuating spring 20.

The shuttle feeler is mounted on the stud 19 so that it may slide longitudinally thereof, as described in said application, the feeler being provided with an upwardly extending arm 90 which engages a slot 91 in the bracket 92 supported on the hopper plate 10. When the feeler is standing in its normal position, as shown in Fig. 1, the cam arm 90 occupies a position at the rear end of the slot 91. ward into the position shown in Fig.2 ready to engage a misplaced shuttle or to sever the thread from a correctly boxed shuttle, then the cam'arm 90 occupies the position shown in Fig. 3 at the forwardend of the slot 91. The swinging and sliding move ments of the feeler result in causing the latter to move in such a path that the filling thread held thereby is relieved from excessive tension when the thread artin mechanism moves back to the position s own in Fig. 1, and consequently the danger of breakage is eliminated. In this manner the filling thread is held out of the path ofthe lay so that this loose end may not be caught up and woven into the cloth, and furthermore, this loose end of the filling is retained in this position until the thread parter as- When the shuttle feeler swings rear-.

sociated with the loom temple severs the thread close beside the selvage. The piece of thread is thus held by the feeler parter until the knife is again opened at the time of the succeeding operation of the weft replenishing mechanism.

In the construction illustrated in said application, the link connection between the arm 16 and the shuttle feeler 18 was liable occasionally to cause a cramping of the parts, due to the longitudinal movement of the feeler. In order to avoid any such action, the link 17 in the present instance is composed of two parts pivotally united together. The link 17 comprises the hook part 171 having its shank end screw-threaded and received in a screw-threaded socket in the clevis 172, being secured in adjusted position by means of a set nut, and the clevis 172, which is pivotally mounted on the second part 173 of the link 17, being secured thereon by means of a cotter pin, as shown, one end of the member 173 being received in a hole in the end of the clevis 172, and the other end being received in a hole in the arm 16, the latter end serving as a point of attachment for the rear end of the spring 20 by which the member 173 is held in place in the arm 16.

The present construction is further improved over that shown in the said application by the extension of the floor of the shuttle box 100 inwardly, and forming in ita depression 101 inclined forwardly from a i point adjacent the reed to the front edge of the lay which receives the opened blade 31 of the knife, and permits the knife to be presented to the thread in a position lower than that of the said application. This is of importance, as it enables the parter to catch the thread in a lower position.

Having thus described the invention, what is claimed is:

1. A weft replenishing loom having, in combination, weft replenishing mechanism including a hopper arm, a shuttle feeler, a movable knife pivoted thereon, a cutting blade cooperating with the knife, a knife holding plate, a spring washer cooperating with the holding plate to yieldingly hold the knife in any position to which it may be moved, a lever pivotally mounted on a stationary portion on the machine, and a bypass pawl carried by the hopper arm adapted to engage the lever to open the knife upon operation of the hopper arm.

2. A weft replenishing loom having, in combination, a hopper arm provided with a bypass device, a shuttle feeler, a thread parting mechanism provided with a knife pivoted on the shuttle feeler, means carried by a stationary part of the loom and operated by the bypass device on the hopper arm to open the knife to engage the thread when the hopper arm moves in one direction, and a lay adapted to engage the knife to close the same and sever the thread.

3. A weft replenishing loom having, in combination, a hopper arm provided with a by-pass device, a shuttle feeler pivoted above the lay, a thread parter comprising cutting blades mounted on the shuttle feeler, and lever mounted on a stationary portion of the machine and adapted to be engaged by the bypass device for actuating the parter to open the blades.

4:. A weft replenishing loom having, in combination, a hopper arin provided with a bypass device, a shuttle feeler pivoted above the lay, a thread parter comprising cutting blades mounted on the shuttle feeler, and a lever mounted on a stationary portion of the machine adapted to be actuated by the by-pass device for actuating the parter to open the blades, said lever engaging one of the parter blades to open them during the shuttle feeling movement of the feeler but not at other times.

5. A weft replenishing loom having, in combination, a hopper arm, a shuttle feeler pivoted above the lay, a thread parter comprising cutting blades mounted on the shuttle feeler, a lever mounted on a stationary portion of the machine for actuating the parter to open the blades, said hopper arm being provided with a by-pass pawl to actuate the parter opening lever when the hopper arm is moved to indicate replenishmentbut not when moved in'the opposite direction, and means for adjusting the pawl to increase or diminish the throw of the parter opening lever.

JONAS NORTHROP.

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