US2182103A - Loom - Google Patents

Description

G. WIGET.

Dec. 5, 1939.

Filed April 27, 1958 2 Sheets+Sheet 1 Dec. 5, 1939. G. WIGET 2,182,103

I LOOM Filed April 27, 1938 2 Sheets-Sheet 2 Patented Dec. 5, 1939 I UNITED'STATES PATENT OFFICE LOOM Application April 27, 1938, Serial No. 204,651

In Switzerland July 10, 1935 4 Claims.

This application is filed as a continuation in part of the application of the same inventor Serial No. 89,037, filed July 6, 1936, and is filed for the purpose of meeting the Examiners objections to the original application on the groundof inoperativeness of the disclosure.

This invention relates particularly to weft-replenishing looms in which bobbins or other weftfilling carriers are transferred one by one from a multiple feeder to loom shuttles,'as the weftfilling is exhausted or is about to become exhausted, and is concerned particularly with the devices for clamping the weft-thread as the bobbin is to be discharged from the shuttle and for cutting the thread. In accordance with the invention the clamping device and the cutter are mounted on a swinging lever or carrier which swings toward and from the shuttle box in a horizontal plane. Thereby the structural design as a whole is simplified as compared with an arrangement in which the cutter swingsin a vertical plane, the thread picked up by the clamp in the return swing of the lever being more easily drawn out and at the same time being held securely in the clamp, whilethe cutting of the thread is effected close to the shuttle in the movement of the cutter. more fully explained hereinafter with reference to the accompanying drawings in which a convenient embodiment thereof is illustrated, and in which:

Figure l is a view in vertical sectional elevation of a mechanism which embodies the invention, the operating elements of which are represented in the positions which they assume when the thread of a bobbin in the shuttle has been so completely or nearly exhausted that the bobbin must be replaced by a full bobbin, a rotatable bobbin feeder being shown.

Figure 2v is a view of the same in sectional elevation on the plane indicated by the broken line 2-2 of Figure 1, looking to the right, shuttle and shuttle box being also shown.

Figure 3 is a plan view of certain of the parts shown in Figures 1 and 2, partly in horizontal section, the lay, shuttle box and shuttle being also shown.

Figures 4 and 5 are detail views, partly in section, illustrating the thread clamping devices in different positions.

Figure 6 is a detail view in section and on an enlarged scale showing the members of the thread clamp in open position, the thread being in position for clamping.

Figure '7 is a view similar to Figure 5, but show- The invention will be' ing a slightly modified form of the clamping device.

Figure 8 is a view in section and on an enlarged scale of the clamp shown in Figure 7.

Figure 9 is a view generally similar to Figure 5 2, but showing the operating elements in the positions which they have so long as there remains on the bobbin in the shuttle a sufficient amountof thread to render unnecessary the replacement of the bobbin, the weft-feeler, which 10 may be of usual construction being also shown in orderthat the functioning of the mechanism may be understood as well when the bobbin does replacement. 5

Figure 10 is a plan view of some of the parts shown in Figure 9.

As the source of supply of the bobbins to be placed one by one in the shuttle C, aseach bobbin is exhausted or nearly exhausted of its weft-filling thread, there is shown a rotatable feeder which comprises a shaft I mounted in fixed bearings 2 and 2 and two parallel discs I and I adapted, as usual to receive the two ends of a plurality of-bobbins and present them one by one, in position to be transferred from the feeder to the exhausted shuttle when it is in position in the shuttle box B at the corresponding end of the shuttle race or lay. Adjustably secured tonne of the bearing members, as by a bolt and slot connection 3', is a bracket 3 which receives a I vertical pivot bolt 4 on which is mounted to swing in a horizontal plane, toward and from the shuttle race near the shuttle box,

a lever arm or clamp and cutter carrier 5. On the lever arm or carrier 5 is mounted a roller 6 to coact with a control arm 1 which is formed witha cam lift 1' and is mounted with capacity for longitudinal adjustment on a spindle 8 which is carried by a forked arm 9' of the hammer-like transferrer 9, by which each bobbin is transferred from the multiple feeder above described to an exhausted shuttle in position to receive it. A coiled spring ID on the spindle 8 tends normally to raise the control arm 7 against the roller 6. Also mounted on the spindle 8 is a pusher II which, when a bobbin is to be placed in the shuttle, is maintained'by the action of the spring ID with its end in line with a hunter l2 carried by the lay I3. When the control arm I is in the position shown in Figure 2, which it occupies when a bobbin is to be placed in the shuttle,

the hunter l2, in the forward movement of the lay, will coact with the end ll of the pusher and so cause the hammer-like transferrer' to be swung Loosely pivoted on the bearing member 2* of the bracket 3 is a spindle I5 which passes through an aperture formed in the .lever arm or carrier 5 and receives,'-between the fcarrier 5 and a nut i5, 2. springld which tends to swing the lever arm or carrier toward the shuttle race, as indi....

' loom frame is a toothed latch 28 which in the rearward movement of the member 20 with the cated by the arrow 5 of Figure 3. The lever arm or clamp carrier 5 is provided with a curved finger 5' for coaction witha control lever I6 pivoted at Ili and having secured toiits other end functions-in the usual manner-and is shown in some detail in Figure 9. It will be understood .that 'in' the -'forward movement 'of' the'pusher I I by reason o-f its'coaction withathe-lbunter l2 the control, arm' Tris also movedforwardly, its end being theninxalinement ,with 'the bunter I2 and that; in the upward movement o-f'the hammer- .lik'ea transfer'rer 9, "thefcontrola. arm I will be -moved rearward under the roller 6 and by reason ofits ca'm' 'surface "I will be depressed so that "the pusher II will also be swung-downward and :i-ts'iend moved outof-alinementwith the hunter l2: Therefore there will-be no movement of the 'transferrer 9 and its associated parts unless through the action of the bobbinfeeler' represented by=therod I! the bobbin previously in the shuttle is exhausted and" the shuttle is in wreadinese to receive another= bobbin from the and the loom shed; the weft-thread'B then'in theclzimpedposition represented by the line B It will be understood that the cutter edgeo'f the eutter blade I9 is inclined downwardly below the loweredge of'the arm It, with which it cooperates-in the nature of afshea'r" blade, so that in the rearward movement of the carrier 5, the sharp "edge of the blade -'I9"cont'acts the weft thread B 'andsever's'it "Also mounted" on' the swinging carrier 5 is the clamping devicewhich holds the weft-thread between theloom'shed and'the butter, The clamping devic'e, as shown'in Figures'4 and 5, comprises "a'r'elatively fixed member "20, which is grooved rongaueman at itsfo'rwa'rd end, as indicated at 20 1 Inthe longitudinally slotted rear portion of the member 20'is' 'pivote'd as at 2 l, a multiarmed lever 22'which has'a downwardly and fory cu'rvedarm 22 an upwardly projecting "2 tooth 2 and'a rearwardlyand upwardly curved arm? 2". It has also'a rearwardly extended arm 2'2 which has pivoted 10656133 thereonat its forwere end,as'at"'23, tubular clamping headl l whibh can sw'ing suflioiently on its pivot to conform to the grooved portion'Zllf of'the fixed member 26 "when t he lever 22, is swung so as to move ,the'head zfl into contact'with the grooved member '26 'nd thereby ,clampthe weft-thread securely. A spring LZjI on,' a s"pindle .26, pivoted l'oos'elybnthe lever 22 reacts bet'ween the head which the spindle'26 moves.

of the spindle and an abutment 20 through which the spindle 26 passes freely and in which it is guided, causes the clamping head 24 to be moved toward the grooved portion 20 when the thread is to be clamped and the parts are in the position shown in Figure 5 and also, in' known manner, holds the lever 22 yieldingly in the "position shown in Figure 4 when the lever has been moved into that position.

-,Pivotally mounted on a fixed portion of the swinging carrier 5 is engaged by the tooth 22' of thelever 22, whereby in the continued relative a tension spring I t which tends to move the... control lever IE from the positionshown in full lines in Figure 3 to the' position-shown-"in dot" and dash lines. Also connected to the same arm of the control lever I6, to which is connected-the spring I6, is a rod ll of a weft-feeler which movement .ofthe member 20 the lever 22 is swung from the position shown in Figure 5 to the position shown in Figure 4, the pivot 25 of the spindle 'ZB'thus being caused to pass through the straight .line from the pivot ?.I of the lever 22 to the aperture in the abutment 20 through This movement of the lever 22, through the coaction of the upwardly and rearwardly curved arm 22", causes the latch 28 to be raised clear of the tooth 22. In theoperation of the clamp and cutter, after the weft-thread B has come between the clamping jaws 20, 24, an impact arm 29, carried by the lay I3 and'therefore having relative movement mm respect to the lever 22, coacts with the arm 22 of the lever 22 and causes the lever to'swing from the position shown in Figure 4 to the positionshown in Figure '5, in which the thread is securely clamped between' the clamping "bodies the rod I! to be moved to the right in Figure 3 and the control lever I6 to be rocked in a counterclockwisehirection from the position indicated by {dot and'dash lines and that such movement fo-f thelever I6 permit's'the swinging carrier 5 to swingfrom its forward positiontoward the shuttle race under the influence of the spring It.

."Itwill be understood that when the thread of a, bobbin inthe shuttle Q is completely or so nearly exhausted asto require the replacement of the bobbin by a" full bobbin, the operating elements being in thep osition shown in Figure 2,

the bunter I2 carriedbythelay I3 in its forward movement contacts the end of the pusher I I and thereby causes thetransferrer 9 to swing onfits pivottlland s'o transfers a filled bobbin from the rotatable feeder into the shuttle C, ejecting the exhausted bobbin at .the same time. Obviously, until it is necessary to place a filled bobbin in th-eshuttlethe transferrer 9 must be inoperative and to p-ermit this the pusher II must be held out of the path of thebunter I2. The initiating of the movement of the operating elements necessary to effect this result is effected by the operation of the'usual weft-feeler shown at M in Figure 9 having. a fork 42 which normally rests lightly on the-filled bobbin butpermits the feeler .4] tofallwhen the thread of the bobbin is nearly exhausted. An arm 43 of the feeler overlies the arm M of a two- armed lever 44, 45, the armAE underlying an arm 46, which is pivotally connected. to a lever 41 mounted onshaft 45. A second lever 41, also mounted on shaft 45, is pivotally connected to the rod I! previously referred to. When the weft-feelerfll drops the arm 45 liftsthe free end of the arm fiinto engagement with a hooked arm 48 whichis .pivotally vcormectedwith one arm of a twov armed lever 49 which is continuously oscillated by a cam a rsairos 500m a loom shaft In th is'mannerga's' is' well understood, the rod- HQbeing iIr the position s'hoWn in-Fig'ur s-Q and has imparted to it a 'longitudin'al niovement toward the right causing, through the bell c'rank lever- H" and the connecting rod ll", the'control lever 16; which'normally locks the protector lever-"5, tobe'rocked in counterclockwise directiontounlockthe protector 5,' which pern'i-it'sth'e protector lever i, under the influence of its spring Mfto'swing toward the 'slay- 'inth 'positionshown in Figure =3. H

tector-lever 5 to be rocked forwards-inoppositior'i-to' its spring 1 4 together with the blade "I 9 the clampingfiev'ice" 20 '24.""The forward swing o'f-the protector lever 5 has the result that its roller 6 will run over the cam portion 1 of the control surface of the control arm 7, whereby the pusher H is swung downwards, so that the I pusher will not coact with the hunter I2 and the change of bobbins will thus be prevented.

When, however, the shuttle is in the correct position in the shuttle box, it does not prevent the swinging of the protector lever. During this swinging motion the lever 22 provided with the clamping head 24 first of all strikes with its projecting tooth 22' against the latch 28 (Figure 5) causing the multi-armed lever 22 to perform a rocking motion in the clockwise direction, whereby the clamping head 24 is lifted out of the grooved surface 20 of the lower part 20 and the clamping device is thereby opened, as shown in Figure 4. During this rocking motion of the lever 22 the pivot pin 25 of the spindle 26 will pass from above to below the plane connecting the pivot pin 2! of the lever 22 with the guiding eye provided for the, bar 25'-in the flange 20 of the lower part 2%, so that the pivot pin 25 of the spindle 26 will have passed beyond the dead center position and is now secured in the open position through the action of the spring 2'! of the lever 22 (Figure 4:). After the weft thread B has come between the clamping'head 24 and the lower part 20, an impact arm 29 provided on the slay it will strike, as shown in Figure 4, against a downwardly directed arm of the lever 22, whereupon the said lever is swung into the closed position (Figure 5). The lever 22 will then remain in the closed position, so that the clamping device 24, 2E! will clamp the piece of thread B projecting from the edge of the woven fabric D (Figure 3), which piece of thread is then cut ofi in a known manner from the bobbin by the cutter l9 under the influence of a further movement of the bunter.

After the weft thread has been cut off from the bobbin, the insertion of a fresh bobbin takes place as follows:

When the protector lever 5 performs the last portion of its rocking motion towards the slay, the roller of the protector lever 5 runs downwards over the cam surface I of the control arm 1, whereby the control arm I and the pusher I! are brought under spring action into the position shown in Figure 2. The pusher I I will then strike against the hunter I2 provided on the slay l3, whereupon the transferrer 9 is rocked about its pivot pin 38 in opposition to the pull of a tension spring 3i, so as to insert a fresh bobbin A from the rotatable feeder l into the shuttle. The

-'tr'ansferrer: sis subsequently swung back'by the tension spring 3| into its position of rest against the stop 2".i1 The-rotatable feeder I- is ratched in ail-known manner each time by one step,

b-ringing'the next following bobbin Aywhich is to be inserted, against the s'top 32' (Figure. 2) and thusfixes the position of the rotatable feeder for thelnext bobbin. i

The return swing of the protector lever is brought about through the control lever I6,

'which iis .actuated'by the rod lsll' setting itself again into the position shownin Figure '3 in dotand-dash lines, pressing against the fin'ger 5' and: thereby moving 'the'protector-lever 5- back against the action of itsspring [4. 'On the .pro-.

tectorlever 5 swinging backwardsthe thread portion 3' is loosened. v

v The piece of thread B which 'projects from the edge -'.of the woven fabri'c'is cut off 'i'n a kno-wn manner. by a "second pair of shear-snot necessary to'be' shown, close to the'cedgeof thewoven fab ric, either'in phase with the motion of the slay or in dependence on the bobbin change.

At the next change of bobbins and the consequent new rocking motion of the protector lever 5 towards the slay, the multi-armed lever 22 is again opened through the coaction of its projecting tooth 22' with the shoulder of the latch 28 and the above described procedure is repeated again.

The control arm 1 which coacts with the roller 6' of the protector lever 5 is adjustable in its longitudinal direction on the spindle 8, for the pur pose of which the control arm I is provided with a longitudinal slot T" (Figures 2 and 3). This adjustability of the control arm I enables the moment of coaction of the said roller 6 with the cam portion 1 of the control surface of this control arm i to be regulated.

The clamping device shown in Figures 7 and 8 has on the lever 22 a flat clamping jaw 24 which is pivoted on the cross pin 23 and is capable of coacting by means of a groove with the lower part 20 which has a corresponding convex counter surface 20 (Figure 8). On the multiarmed lever 22 is a pin 33 (Figure '7) which engages in a hole 34, of slightly larger diameter, of the jaw 24*, whereby the latter is capable of a limited rocking motion on the lever 22, for enabling it firmly to grip the threadwhich is to be cut off between the parts 24* and 20 The control arm I and the pusher I I may together form a single member.

It will be understood that various changes in details of construction and arrangement can be made to suit different conditions and that, except as pointed out in the accompanying claims, the invention is not restricted to the particular construction shown and described herein.

I claim as my invention:

1. In a loom, the combination with a lay and shuttle box, of a carrier mounted to swing toward and from the lay in a horizontal plane, a weft-threadclamping device mounted on the carrier and comprising a member stationary with respect to the carrier, a lever pivoted on the stationary member and having an arm with a' straight line from the pivot of the lever to the guide.

2. In a learn, the combination with a lay and shuttle box, of a carrier mounted to swing toward and from the lay in a horizontalplane, a weft-thread clamping device mounted on the carrier and comprising a member stationary with respect to the carrier, and a lever pivoted on the stationary member and having an arm with a clamping head to coact with the relatively stationary member and having also an arm extended therefrom, and a pivoted latch arranged to coact with the lever in the movement of the carrier to cause it to turn on its axis to move the clamping head from the relatively stationary member, the last mentioned arm of the lever coacting in the turning movement of the lever to move the latch out of engagement with the lever.

3. In a loom, the combination with a lay and a shuttle box, of a carrier mounted to swing toward and from the lay in a horizontal plane, a

' weft-thread clamping device mounted on the .carrier and comprising a support and a thread clamping member stationary with respect to the carrier, a multi-armed lever mounted on the support and having a second thread clamping member, one of said clamping members having a channel portion for the reception of the first mentioned clamping member, whereby the weftthread will be clamped transversely therebetween, means to rotate the multi-armed lever in the swinging movement of the carrier, and means for locking said multi-armed lever at each end of its rotary movement.

4. A device as set forthin claim 3 having a locking spindle pivotally mounted on the multiarmed lever in off-center relation to the pivot of the multi-armed lever, a flange on the support for confining the free end of the spindle, and a spring mounted on the spindle between its pivotal point and said flange.

GEORG WIGET.

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