US1979764A - Thread extractor for weft replenishing looms - Google Patents

Description

N 1934- o. v. PAYNE 1,979,764

THREAD EXTRACTOR FOR WEFT REPLENISHING LOOMS Filed Oct. 19'; 1951 4 Sheets-Sheet 1 Nov. 6, 1934.

o. v. PAYNE 1,979,764

THREAD EXTRACTOR FOR WEFT REPLENISHING LOOMS Filed Oct. 19, 1931 4 Sheets-Sheet 2 Nov. 6, 1934 o. v. PAYNE 1,979,764

' THREAD EXTRACTOR FOR WEFT REPLENISHING LOOMS Filed Oct. 19, 1931' 4 Sheets-Sheet 3 NOV, 6, 1934. Q v PAYNE v 1,979,764

THREAD EXTRACTOR FOR WEFT REPLENISHING LOOMS Filed Oct. 19, 1931 4 Sheets-Sheet 4 .Zizwzfar 05m? 1 @y/va Patented Nov. 6, 1934 UNITED STATES THREAD EXTRACTOR FOR WEFT REPLEN- ISHI'NG LOOMS Application. October 19, 1931, Serial No. 569,585

21 Claims.

This invention relates to improvements in thread controlling devices for weft replenishing looms and it is the general object of the inventionto" provide improved means for preventing the thread of the outgoing bobbin from entering the shed.

In bobbin changing looms there is usually emplayed a shuttlehavingan eye through which the weft is threaded. At the time of transfer the m weft extends from the bobbin chamber within the shuttle, through the eye, and back to the adjacent selvage. When the depleted bobbin is expelled it is desirable to remove this thread so as to prevent it from being drawn into the shed.

It is an important object of my present inventionto provide means for grasping the thread at a pointbetween the selvage and the shuttle eye and moving it forwardly while causing it to reevearound a projection or the like which causes the thread to be drawn from the box;

of the lay to assist in withdrawing the weft end from the shuttle box. In this connection I employ devices which cause the weft to reeve around several guides one of which, preferably the one adjacent the selvage, exerts a light strain or tension on the weft requiring the latter to be drawn around the other of the reeving devices. The rearward movement of the lay coupled with the forward movement of the catcher results in withdrawing a, substantial length of weft from the shuttle box. One of the reeving devices may be carried by the lay and is formed as an upwardly extending post or horn down which the weft moves when released, the short weft ends accumulating at the bottom of the horn well below the path of the shuttle.

In multicolor weft replenishing mechanisms there is usually employed a vertically reciprocable actuator member which is given a downward movement when the weft detector indicates exhaustion of yarn, and it is a further object of my invention to employ a reciprocating actuator to set the thread catcher in open or thread receiving' position, the catcher being movable to thread engaging position by a subsequent operation of the magazine and being reset preferably by the lay. It is a further object of my invention to dispose the catcher in such a position that when open its jaws will point downwardly so that a weft previously held thereby can fall by gravity,

Another object of my invention relates to the proportionate lengths the thread has with respect to the shuttle eye and selvage, the length of thread being taken. up by the reeving device plus the distance from the horn to the selvage 605 being greater than the distance from the horn to that point along the shuttle where the weft is severed. By this relation of parts the weft end is prevented from being drawn into the shed even though it should be whipped toward the 5 cloth as the shuttle is picked.

With these and. other objects in view which will appear as the description proceeds, my invention. resides in the combination and arrangement. of parts hereinafter described and set forth 7 in the claims.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a side elevation of a weft replenishingmechanism taken from the center of a loom and having my invention applied thereto, certain parts being in section, and the thread catcher being in normal or reset closed position,

Fig. 2 is afront elevation taken in the direc tion of arrow 2, Fig. 1,

Fig. 3 is a side elevation of, the catcher unit with the jaw open and shown in the position it assumes when ready to receive weft,

Fig. 4 is a front elevation taken in the direction of arrow 4, Fig. 3,

Fig. 5 is a detailed vertical section on line 5--5 of Fig. 3,

Fig. 6 is a diagrammatic view showing the shuttle, cloth and devices for operating on the weft in the relation they assume at the completion of a transfer,

Fig. 7 is a diagrammatic view showing the length of the paths that the weft may assume when the catcher is reset and the lay is in the rearward position,

Fig. 8 is a side elevation of the plate 38 looking in the direction of arrow 8, Fig. 4,

Fig. 9 is a vertical section on line 9-9, of Fig. 4,

Fig. 10 is a vertical section on line 1010, Fig. 4, the parts behind the lever 46 being omitted, 10o

Figs. 11 and 12 are detail vertical sections on lines 1l11 and 12-12, respectively, of Fig. 4, showing the trigger and clamp detached, and

Fig. 13 shows a shuttle guard for one of the plates.

Referring particularly to Figs. 1 and 2, I have shown a loom frame 10, a lay L with a shuttle supporting surface K and a magazine M having a color slide 11 movable longitudinally by the box motion not shown through lever 12. A ver- 110 tically reciprocating rod 13 is operatively connected at its upper end to a lever 14 and the color slide to oscillate the latter. The lower end of the rod 13 is pivoted as at 15 to an actuator lever 16 attached to the upper end of a pump rod 17. Vertical bobbin cradle controlling slides 18 may be provided to control the top rocking member 19, and the latter is yieldingly held in the normal position shown in Fig. 2.

Secured to one of the tie rods 20 of the magazine is a stand 21 from which extends downwardly a supporting rod 22. A lever 23 is supported by and pivots around the rod 22 and rests on head 24 of the rod. A twist spring 25 tends normally to move the right hand end of the lever as shown in Fig. 2 rearwardly or toward the shuttle, and the latter has an anvil or the like 26 which is moved forwardly by the advance of the lay-to register with a cutter 27 carried by the lever 23. The transferrer T has a finger 28 which acts as a stop to limit movement of lever 23 under influence of the spring 25, forward movement of the finger permitting the cutter 27 to move rearwardly under action of the spring 25. The shuttle eye 29 delivers the weft W toward the adjacent selvage as viewed in Fig. 2. The lever 23 and shuttle act on a transferring beat of the loom to sever the weft at a point closely adjacent the delivery eye 29. Any desired form of cutter designated generally at 30 may be employed to sever the weft adjacent the selvage.

My invention relates more particularly to means for grasping the thread at a point intermediate the selvage and shuttle eye cutters, and in carrying my invention into effect I provide a rearwardly projecting stand 35 secured to the magazine frame and supporting a stud 36. The catcher unit C is supported by and moves angularly around a stud 36 and comprises a pair of spaced plates 37 and 38 which are located, respectively, one nearer the shuttle eye and the other nearer the selvage, as set forth diagrammatically in Fig. 6. The plates are shown in Figs. 8 and 9. catcher has a rearwardly extending arm 39 attached by means of a rod 40 to the top shaft 41 of the member 19. The latter shaft is usual construction and when the magazine is set may be raised in some such a position as that shown in Fig. 2. The leverage between shaft 41 and the catcher is such that the latter will be moved from the position shown in Fig. 1 to that shown in Fig. 3 when the shaft is rocked in a right hand direction as viewed in Fig. 2 due to downward motion of one of the vertical slides.

Plate 37 has pivoted thereto as at 45 a lever 46, shown in Fig. 10, having an upwardly and rearwardly extending arm 47. The lower part of lever 46 has upper and lower jaws 48 and 49, respectively, which define between them a thread receiving notch 50. The upper jaw has 'a vertical hole 51 through which extends the lower end of a trap wire 52 pivoted loosely in the plate 37, as shown in detail in Fig. 5, and arranged to coact with the lower jaw to close the notch at certain times.

A trigger 53, shown in Fig. 11, is pivoted to lever 46 at 54and carries a stud 55 which is attached by means of a tension spring 56 to a connector pin 57 secured to and extending between the plates 37 and 38. This spring passes to the rear of pivot 54 as shown in Fig. 3, and acts to hold one of, two notches 58 and 59 in thetrigger against pin ,57. Under normal conditions the rear notch 59 receives the pin 57, the

trigger being in the raised position shown in Fig. 1. In this position, also, the arm 47 of lever 46 lies closely adjacent the rear edge 60 of the plate 37.

The rod head 61 which is on the lower end of rod 13 has vertically adjustable therein a trip 62 which normally lies above the trigger 53. A stop 63 is adjustably mounted in the stand 35 to engage one of the plates of the catcher to prevent the trigger 53 from moving upwardly far enough to strike the trip 62 when the catcher is reset.

The lower end of plate 38 carries a clamp 65 which is moved by a light compression spring 66 against the right-hand face of plate 38 as viewed in Fig. 4. This clamp is pivoted about a stud 67 aligned with stud 45 and has a lower jaw 68 similar in outline to the jaw 49, see Fig. 12. The upper arm 69 of the clamp is connected to the pivot 54 so that said clamp and lever 46, although separate parts, move in unison.

The lay carries a stand 70 having vertically and adjustably held therein a snare, projection, or horn 71 held by set screw 72. The snare may be formed substantially as shown in Fig. 1, and if desired can be provided with a hook 73, although the latter is not necessary. A sheet metal guard 74 may be secured to a bracket 75 secured to the loom and used to support other operating mechanism. This guard and the snare form a guide passage for the weft yarns Y. The horn 71 as shown in Fig. 1, extends from a point above the shuttle supporting surface to a point below said surface.

In operation, the magazine parts will normally be in the position shown in Fig. 1 when the shuttle S is on the magazine side of the loom and the lay is moving forwardly. The yielding device which is ordinarily connected to the top shaft 41, but not shown herein, will serve to hold the catcher C against the stop 63 and the trigger 53 will be raised with the arm 47 shielded by one of the plates. As the weft detector D feels the active weft the rod head 17 will move downwardly, and if sufficient weft is present the rod 13 will remain unchanged, as is usual in the ordinary multicolor magazine. If weft be depleted, however, the weft detector will act to cause a depression of lever 13 to effect contact between trip 62 and trigger 53. The latter will be rocked about pivot 54 to raise the notch 59 away from the pin 57, whereupon the spring 56 will act to rock the lever 46 in a counter-clockwise direction as viewed in Figs. 1 and 3, thereby moving the arm 47 to the unshielded rear position shown in Fig. 3. As the compound lever formed by parts 46 and 53 continues to move rearwardly the rod 57 enters the second notch 58, whereupon rearward movement will be arrested. The result of this motion will be to open the notch 59 and lower the clamp 68.

By referring to Fig. 3 it will be seen that the lower end of the trap wire 52 does not project into the notch so that the latter is free and unobstructed to receive the weft of the running shuttle.

A shuttle guard on the lower part of plate 37, shown particularly in'Fig. 13, is positioned to engage the tip of the shuttle should the latter be displaced inwardly. When worn, the guard can be replaced, thus preventing wearing of the arm 37 by the shuttle.

The catcher will remain in the raised position shown in Fig. 1 until the indicating shuttle returns to the magazine on a subsequent pick, at which time the top shaft 41 will have an angular extending into the box is free to respond to the movement to raise rod 40 and thereby swing the catcher from'the position shown in Fig. 1 down to the position shown in Fig. 3. As the lay advances the weft of the boxed shuttle will enter the notch 50 and also pass over clamp 68. Further advance movement of the lay will cause engagement between arm 47 and a resetter adjustably mountedon the lay as to forward position. This device 80 rocks the lever 46 around the pivot as, moving pivot 54 to the right as viewed inFig. 3 so that spring 56 can cause the pin 57 to enter notch 59. The effect of this movement isto reset the jaws 48 and 49 to normal position and close the clamp. During this resetting movement the lower jaw will be raised toward the bottom of trap wire 52 and will coact with the latter to trap the weft which will be located between the trap wire and the pivot 45. A notch 81 in plate 38 prevents the weft from moving rearwardly away from the clamp. The weft is lightly pinched or clamped against plate 38, but is free to reeve around the trap wire pin 52. ,The trap wire 52 and notch 81 will lie behind the horn '71 during the latter part of the lays advance, as shown in Fig. 6.

The final part of the forward movement of the lay, the resetter 80 will strike one of the plates 37 or 38, and move the catcher from the posi tion shown in Fig. 3 to that shown in Fig. l. During this movement the thread which extends from the clamp to the notch 50 moves forwardly against and is caught behind the snare 71 because of the fact that the upper end of the latter lies between the plates 3'? and 38, as clearly shown in Fig. l. When the catcher has reached forward position the weft will have moved from the full line position shown in Fig. '7 to the dotted line shown therein. The rearward movement of the lay which starts as soon as the catcher is reset, carries the horn 71 rearwardly, thereby lengthening the distance between the clamp and the horn, to increase the amount of weft take-up.

It is to be understood that the weftis cut at the shuttle eye so that the end of the filling reeving action of the snare together with the clamp and trap wire 52 as the catcher is reset. The clamp is sufficiently light so that the weft can slide therethrough as the catcher moves to normal position if any strain should result due to the weft being attached to the selvage.

It will be seen that the amount of take-up provided by the particular form of the invention shown herein is double the extreme distance between the horn 71 and the trap wire 52 and clamp,

and this is found to be suiiicient to remove the weft from the shuttle box, so that the shuttle will not be able to draw the weft end into the shed. This will be apparent from an inspection of Fig. 7, where it will be seen that the length 85 plus the length 86 of the weft, together with the distance between the snare '71 and the adjacent selvage 87, is greater than the length of weft 88 extending from the snare to the shuttle eye cutter.- In other words, the path which must be traversed by the weft because of the reeving device is such that the end of the filling which is released bythe delivery eye cutter 27 cannot enter the cloth.

From the foregoing it will be seen that I have provided means for taking up a considerable,

Although Ihave shown but one horn on the lay, yet I do not wish to be limited to the specific formshown in the drawings either with respect to the horn or trap wire. Also, the rod 13 opens the'jaws on indicating beats of the loom, and the jaws point downwardly to assist in the release of the thread.

Furthermore, the snare 71 engages the weft at approximately its mid-point, so that the yarn ends will fall down along opposite sides of the snare to be supported by the stand and to assume the positions shown at Y in Fig. 1. Again, it will be noted that the clamp which is preferably supported by the plate adjacent the selvage exerts a light friction on the weft suificient to allow the same to slip therethrough if the yarn is subject to a strain when the lay moves forwardly while still attached to the selvage, buttight enough to require the weft to reeve around the projection '71 and the trap wire 52. The distances and proportions described in connection with Fig. '7 insure a, complete withdrawal of the weft from the shuttle box.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a weft replenishing loom having a lay and shuttle with a delivery eye, means to sever the weft of the shuttle adjacent the eye, other means to sever the weft adjacent the selvage, and means including a plurality of elements certain of which are independent of the lay and the remainder moving with the lay to produce a plurality of bends in the weft between the eye and selvage to take up the weft and draw the same away from the eye.

2. In a weft replenishing loom having a lay and shuttle with a delivery eye, means to sever the weft of the shuttle adjacent the eye, other means to sever the weft adjacent the selvage, and means including an element mounted on the lay brought into action by the motion of the lay to produce a plurality of bends in the weft between the eye and selvage to takerup the weft.

3. In a weft replenishing loom having a lay and shuttle with a delivery eye, means to sever the weft of the shuttle adjacent the eye, other means to sever the weft adjacent the selvage, and means including a part actuated in timed relation with the lay to produce a plurality of bends in the weft between the eye and selvage to take up the weft, the part of the weft forming one of the bends forming an acute angle.

4. In 'a weft replenishing loom having a lay and shuttle with a delivery eye, means to sever the weft of the shuttle adjacent the eye, other means to sever the weft adjacent the selvage, and means including two relatively movable parts one of which derives its motion from the lay to produce a plurality of bends in the weft between the eye and selvage to take up the weft.

5. In a weft replenishing loom having a lay and operating with a shuttle having a delivery eye, means to sever the weft of the shuttle at the eye and cloth selvage, and a plurality of weft engaging reeving means located between the shuttle eye and selvage and brought into action at the time of transfer, the lay motion causing relative movement of part of said means relatively to the remainder thereof to produce a plurality of bends in the weft to take up the latter.

6. In a weft replenishing loom having a lay andoperating with a shuttle having adelivery eye, means to sever the weft of the shuttle at the eye and cloth selvage, means to engage the weft of the shuttle at two spaced points between the eye and selvage', and adevice to engage the weft between said points, the lay causing relative movement between the device and means; totake up the weft.

7. In a weft replenishing loom having a lay and operating with a shuttle having a delivery eye, means to sever the weft of the shuttle at the eye and cloth selvage, means to trap the thread at one point between the eye and cloth selvage, means to impose a light tension on the weft at another point between the eye and selvag'e', and. a device movable relatively to the means to engage the weft between said points and cause movement of the weft through the trap means.

8'. In a weft replenishing loom having a lay and operating with a shuttle having a delivery eye, means to sever the weft of the shuttle at the eye and cloth selvage, means to trap the thread at one point between the eye and cloth selvag'e, means to impose a light tension on the weft at another point between the eye and selvage, and a device carried by the lay movable relatively to the means to engage the weft betweensaid points and cause movement of the weft through the trap means.

9. In a weft replenishing loom having a lay and operating with a shuttle having a delivery eye,- means to sever the weft of the shuttle at the eye and cloth selvage, anupwardly projecting horn on the lay, and a pair of reeving devices to engage the weft on opposite sides of the horn and between the eye and selvage and coaet with the horn during backward movement of the lay to produce bends in the weft.

10. In a thread extractor for a weft replenishing loom, an upwardly projecting horn carried by the lay, means to sever the weft thread of the outgoing bobbin on both sides of the horn, and means to deposit the weft on said horn at a point intermediate the severed ends of the weft.-

ll. In a weft replenishing loom having a lay with a shuttle supporting surface, means to sever the weft at two spaced points, and an upstanding horn on the lay between the points and in front of the weft to snare the severed weft and prevent it from being drawn into the shed, said horn pointing rearwardly relatively to the lay and ex-' tending from a point above said supporting surface to a point below said surface.

12. In a weft replenishing loom having a lay with a shuttle supporting surface, means to sever the weft at two spaced points, and an upstandlng horn on the lay between the points in front of the weft to snare the severedweft and direct the weft downwardly with the ends of the weft lying on opposite sides of the horn, said horn pointing reaivvardly relatively to the lay and extending from a point above said supporting surface to a point below said surface.

13. In a weft replenishing loom having a lay along which the weft extends from the shuttle to the cloth selvage, an upstanding horn on the lay normally in front of the weft, means to move from a position in front of the horn to a position behind said horn and engage the weft and draw the latter forwardly into engagement with the horn, and means to sever the weft on opposite sides of the horn, the severed weft being directed down along the horn out of the path of the shuttle.

14. In a weft replenishing loom having a lay revewei along which the weft extends from the shuttle: to the cloth selvage, an upstanding horn on the lay normally in front of the weft, means to move from aposition in front of the horn to aposition behind said horn and on either side thereof and engage the weft and draw the latter forwardly into engagement with the horn, and means to sever the weft on opposite sides of the horn, the severed weft being directed down along the horn out of the path of the shuttle.

15. Ina weft replenishing loom having a lay with a shuttle supporting surface, means to sever the weft at two spacedpoints, and an upstanding horn on the lay extending upwardly in front of the lay and between the points to snare the severed weft and prevent it from being drawn into the shed, said horn pointing rearwardly' relatively to the lay and extending from a; point above said supporting surface to a point below said surface.

16. In a weft replenishing mechanism having a lay, a member to move upon indication of weft exhaustion, a second member to move preparatory to transfer, a thread reeving device carried by the lay, and a mechanism to coact with the device to produce bends in the weft to take up the latter, the first member when moving to open the mechanism to thread receiving position, the second member to thereafter move the mechanism to thread receiving position, means to close the mechanism on the thread and restoresai'd mechanism to normal position to effect reeving of the weft by the device, the mechanism to retain the weft thread until the next indicating movement of the first member, the latter upon. said '5 next indication releasing the weft.

17. In a weft replenishing loom having a lay and a shuttle with a delivery eye from which a weft thread extends along the shuttle and lay to the cloth selvage, a weft detector onthe replenishing side of the loom, a member movable at the time indication of weft exhaustion is given by thedetector and a plurality of picks prior to replenishment, a thread cutter adjacent the eye of the shuttle to sever the weft on transferring picks of the loom, a second cutter to sever the weft at the selvage, means to clamp the weft between said cutters and release the weft on the next indicating movement of the member.

18. A thread controller unit for a weft replenishing loom having a pivotal support and a mover movable at replenishment, a supporting structure movable about the pivotal support by a force derived from the mover, an actuator lever pivoted to the structure, a trigger pivoted to the lever, a stop on the structure, yielding means to hold the trigger against the stop, a clamp pivoted to the structure to hold a weft thread, said clamp operatively connected to and moved by the lever, and

means defining a trap and coacting with the lever l to trap the weft which is held by the clamp.

19. In a weft thread controller for weft rep1en-' ishi'ng looms, a supporting structure movable from normally inoperative to operative position at replenishment, a thread trap on the structure to be opened when the structure moves to operative position, the thread capable of reeving through the trap when the latter is closed, a thread clamp on the structure to hold the weft thread at the time of replenishment, and a device between the trap and clamp and with respect to which the structure moves to cause the weft to reeve around the trap while held by the clamp.

20. In a weft thread controlling unit for a weft replenishing loom having a resetting element and release member, said unit comprising a supporting structure movable from a normal inoperative position toward the thread extending from a shuttle at the time of weft replenishment, a thread trap on the structure, a thread clamp on the structure, said trap and clamp being normally closed, an actuator supported by and movable with respect to the structure and operatively related to the trap and clamp to move said trap and clamp in unison, and a yielding lock for said actuator, the release member engaging the lock to release the actuator preparatory to weft replenishment, and the actuator engaging the resetting element OSCAR V. PAYNE.

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