US446177A - And frank s - Google Patents

Description

2 SheetsSheet 1.

(No Model.)

H. WYMAN & F. S. WEBB.

LOOM FOR WEAVING TUFTED FABRICS. No. 446,177.

Patented Feb. 10,1891.

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2 Sheets-Sheet 2.

(No Model.)

11.. WYMAN & I. s. WEBB. LOOM FOR WEAVING TUFTED FABRICS.

' Patented Feb. 10,1891.

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' UNITED STATES PATENT OFFICE. I

HORACE IVYMAN, OF WORCESTER, MASSACHUSETTS, AND FRANK S. 'WEBB, OF BRIDGEPORT, CONNECTICUT, ASSIGNORS TO THE CROMPTON LOOM \VORKS, OF WORCESTER, MASSACHUSETTS.

LOOM FOR WEAVING TUFTED FABRICS.

SPECIFICATION forming part of Letters Patent No. 446,177, dated February 10, 1891.

Application filed March 14, 1890. Serial No. 343,841- (No model.)

To all whom it may concern.-

Be it known that we, HORACE IVYMAN, of Vorcester, county of lVorcester, State of Massachusetts, and FRANK S. WEBB, of Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Looms for \Veaving Tufted Fabrics, of which the following description,in connection with the accompanying drawings, is a specification, like let- IO ters and figures on the drawings representing like parts.

This invention has for its obj eet to improve looms in which tufted yarns for the formation of tufts are introduced from above into and between the warp-threads and are secured by filling-threads passing around them, said tufted yarns being carried and introduced between the warp-threads by a series of needles held in a continuous row across the fabric, each series of the different rows for the pattern holding different-colored yarns, according to the pattern to be introduced, the class of loom referred to being represented in United States Patent No. 343,110, dated June 1, 1886, to which reference may be had, it being an improvement on United States Patent No. 245,259.

In one part of our present invention we seek to prevent rebound of the weft-carrier, so that the weft will not be slackened.

Another part of our invention consists in a peculiar weft-nipper to co-operate with the tuft-yarn carriers and with the lay to aid in keeping up the free ends of the tuft-yarns and in holding the tuft-yarns bent into loop form between the weft-nipper and the reed during. part of the operation of weaving each row of tufts.

Other features of ourinvention will be here-/ inafter more fully described.

Figure 1 is a partial front elevation of a suflicient portion of a loom with our improvements added to enable them to be understood, said figure showing the lower ends of some of the needles at the left, the usual devices for carrying them being omitted. Fig. 2 in top view and section shows part of the feeding end of the weft-thread carrier. Fig. 3 is a front elevation of part of the tuft-nipper which co-operates with the lay, as will be described. Fig. 4 is a section in the line m of Fig. 3. Fig. 5 is a partial left-hand end elevation of the loom shown in Fig. 1, chiefly to show the parts instrumental in moving the tuft-nipper. Fig. 6 is a section in the line 00 of Fig. 1, looking to the left. Fig. 7 shows the periphery of the gear C laid out to represent its toothed and blank spaces. Figs. 8 and 9 show two different positions of the reed and tuft-nipper. Fig. 10 is a detail to be referred to. Fig. 11 is a detail of the gear I).

Fig. 12 shows a modified form of tuft-nipper, it being without teeth.

The loom frame A, the feed-roll B to engage the carpet B and feed it through the loom, the main shaft B which in practice carries many of the operative cams, the guide or rail E the carriage B sliding thereon, the weftcarrying needle B attached to the said carriage by a screw 13 and adapted to introduce and leave a double-weft loop in the warps as the carriage slides backward and forward in the guide B attached to the guide B and sustaining the carrier near its inner end, the power-shaft Bflhaving thereon a loose'pulley 13 over which is extended the driving-belt B the hub B having a suitable friction-clutch device to engage the interior of the constant] yrunning loose pulley B? when it is desired to rotate the shaft 13*, the clutch-operating lever a, forked at its inner end and embracing an annular groove in the hub of the clutch B the rock-shaft a, having a handle a and 'an arm to which is jointed the link a which connects the said arm with the said levera so as to cause the friction-clutch B to engage with the rotating pulley B or to be disengaged therefrom, the lay d lay-connecting rods 71.2, and means for moving them are and may be all as common in United Stat-es Patent No. 245,259, dated August 2, 1881, to which reference may be had.

The reed a" of the lay and the tuft-yarn-carryin g needles 0 (but partially shown) are the same as in United States Patent No. 343,110.

In the invention to be herein described I have provided the loom with a suitable shaft 19, upon which is a partial gear I) (see Figs. 1 and 6) or a gear having some of its teeth removed, the said gear also having attached to or forming part of it a flange having a concave face. The outer or right-hand end of the shaftbis provided with an arm b (shown best in Fig. 6,) which is connected, as herein shown, by an adjustable link I) with one arm of anelbow-lever b pivoted at h on a part of the loom-frame. The other arm of the lever 11 is attached by a jointed link b to an arm b of an elbow-lever I)", (see Fig. 6,) loose on a stud Z1 projecting from a stand I9 suitably bolted to the loonrframe, the said elbow-lever I) being vibrated on the said stud whenever the shaft 7) is rotated. The stud b outside the lever b b, has loose upon it-the lower end of a needle-actuating lever c, the upper end of which is jointed at c to a link 0 jointed at c to the carriageB, the sum of the length of the lever c and the link 0 equaling the distance between the center of the stud 11 and the center of the pivot 0 when the carriage into line between the joint 0 and the center of the stud 19 By proportioning the lever and link as described and providing a stop for thelever c rebound of the lever c and inward movement of the carriage on its arrival at the end of its outward stroke is obviated. It has been found in practice that when the sum of the length of the link 0 and of the lever c is greater than the distance between the centers 19 and c the lever at the end of its outward stroke is apt to rebound, start the carriage forward, and slack the filling-thread, thus making imperfect selvages or selva'ges in which the filling is not drawn in and held as snugly as desired.

The main shaft is provided with a large gear 0, the periphery of which is developed in Fig. 7. The gear Gderives its motion from a pinion C, fast on the power-shaft B the said pinion engaging the continuous teeth at theleft of the said gear. The gear 0 is shown as a broad gear, and at its right-hand edge it has alternately, as shown. three series of teeth, as (see Fig. 7,) and intermediate blank spaces C three such blank spaces being herein shown as alternating with the three series of teeth 0 the said teeth and spaces constituting what is called a mutilated gear.. The gear I) has also, as stated, some of its teeth removed, so that the series of teeth C in the rotation of the large gear 0, will come successively into engagement with the teeth of the wheel I) and rotate it once and then run out of mesh therewith. 1

The flange parts 0 of the mutilat ed gear have projecting from them locking-rims 4, which, as soon as the teeth 0 run out of mesh with the teeth of the gear of b, are acted upon by the locking-flange b of the gear I),

and as long as the said flanges 4 and b one being convex and the other concaveare in contact the gear I) and the shaft 1) remain at rest. \Vhen the shaft is so at rest, the weftcarrier is retracted from between the warps, the other parts of thelooin at such time moving to form the shed and to take such other steps as are necessary before the weft-carrier is again inserted in the warp.

As herein shown, the shaft Z2 makes three rotations to one of the wheel C, thus causing three motions of the weft-carrier to each rotation of the shaft B this being the number of double filling-th reads inserted into the fabric to each row of tuft-yarns; but any other desirable number maybe inserted by aproper proportioning of the teeth of the gears C and b.

The weft-carrier has a removable point 6 attached to the main body thereof, as herein shown, by a screw-thread at e. (See Fig. 2.) The head of the weft-carrier has a lip 6 which is so located therein as to come opposite the point of the usual shuttle containing the thread employed to lock the loop of the thread laid by the Weft-carrier, the said lip preventing the pointof the said shuttle from catching -that part of the weft-thread extended from the roller e of the weft-carrier back to the usual bobbin.

Fig. 2 shows the weft-thread in position in the carrier.

The shaft 13 at the left-hand end of the loom is provided with a cam D, which in the rotation of the said shaft acts upon alever D, having its fulcrum at D, the said lever being connected, as herein shown, by an adjustable link D in an adjustable manner to an arm D of a rock-shaft D supported in suitable bearing-stands D at opposite sides of the loom-frame. This rock-sh aft D has fast upon it near each end, but inside the said bearings, a dog e, and the said shaft has loose upon it two arms e to the upper ends of which are attached links or rods 6 connected at their front ends to the tuftnipper e herein shown as having a series of teeth e at one edge, but the said teeth may be omitted, as in Fig. 12; but we prefer the teeth. These teeth enter between the warp-threads, and acting against the upturned free ends of the tuft-yarnslast bent down between the warp-threads, aid in keeping up the said ends, while the loops made in the tuft-yarns (a weft having been inserted in the usual manner) are being beat into place in the warp prior to cutting the said,

they are bent. Each arm 6 mounted loosely nected thereto in an adjustable manner by a set-screw'e", so that by rotating or adjusting the dog about the shaft the force of the said spring may be increased or diminished. The rock-shaft D at the inner side of each arm 8 is also provided with a notched collar h, (shown best in Fig. 1 at the right, where the carpet is broken out,) a shoulder of the said collar being acted upon by a shoulder of the said arm e to limit or stop the forward movement of the arm e due to the spring h to ward the reed r, the latter having dents and being as in any usual loom for weaving tufted carpets.

The tuft nipper acts as an auxiliary to the reed and co-operates with the dents of the usual reed to hold the tuft-yarn in loop form between them as the said yarn is being made.

into tufts. I

In Figs. 1 and 5 we have shown the lower ends of some of the tuft-carrying needles 0 which, as stated, are and may be all as in the Patent No, 343,110, referred to, or of other usual shape. The tuft-yarn carriers or needles are fully lowered between. the warps while the reed is at its back-stroke, and at this time the tuft-yarn nipper or clampingbar occupies a position beyond the cloth-making point for about one-third the distance (more or less) between the cloth-making point and the dents of the reed, and in such position the said bar acts to arrest and support the free ends of the tnft-yarns extended from below the eyes of the tuft-yarn carriers or needles through between the warp-threads. At this time the point of the weft-carrier stands near the selvage, ready'to enter and lay a weft between the open shed and across the ends of the tuft-yarns, such Weft acting as thetuft-locking weft to hold the tufts in the fabric. The double or loop-like weft, having been passed through the open shed, is locked at the opposite selva'ge by a thread carried by a small shuttle, as in the patents referred to, and the weft-carrier is then retracted, the reed, the needles, and the tuftnipper bar remaining stationary while the weft is being laid, as described. As soon, however, as the weft-carrier is entirely retracted from between the warps, the said needles commence to rise, and are lifted until their points are elevated above the warp and above the range of movement of the reed, when the latter starts forward toward the fell of the cloth, and at about the same time the tuft-nipper bar a is moved toward the advancing reed 7', the points 6 of the said bar then standing in the spaces between the warpthreads and acting against the short ends of the tuft-yarns, and the reed and the bar contin ue their movemen t toward each other until the tuft-yarns then bent into loop form are caught between the reed and tuft-nipper, and thereafter in the further forward movement of the reed the lay, acting upon the said nipper, pushes the latter back against the stress of the springs h, the said reed and nipper clamping and holding the said tufts firmly while the reed beats the weft then holding the tuftyarns bent about it firmly in at the fell, after which the reed again commences to move backward away from the fell,and the tuft-nipper, by a movement of the rock-shaft D is retracted to get out of the Way of the cutting mechanism, which is to sever the tuft-yarns and complete a row of tufts, and the nipper bar e, having been retracted and at the same time another shed having been formed, the weft-carrier is again thrust through the shed and retracted, leaving a weft which the lay in its next forward movement again beats in behind the tuft-yarns, all as provided for in the said patents.

Viewing Figs. 8 and 9 it will be seen that the tuft-nipper or clamping-bar c has a heel 100, which, as the said tuft-nipper is pushed toward the roll B by the reed, strikes a cam 102, which causes the tuft-nipper to'be elevated, as shown in Fig. 9, to thus draw the acting teeth-or edge of the nipper from the pile. The lay having been moved fully forward, the tuft yarn cutters (not shown, but common to the said Patent No. 343,110) complete their movement and cut off the tuft-yarns, leaving a row of loops, the said yarns being cut off when the lay is fully forward; but just before the cutters act to sever the tuft-yarns the needles are raised slightly to pull off enough yarn for another row of tufts. The tuft-yarns having been cut off, the cutters will separate, the laywill be moved back, and the tuft-yarn carriers being elevated all into the same plane and selected according to color, as provided for in the said Patent No. 343,110, the shed will again be formed and the weft-carrier be for a third time inserted through the shed and retracted. During the time that the weft-thread carrier is being so retracted theneedles next to be employed for the next row of tufts will be dropped and the tuft-nipper bar will be moved forward substantially into the position shown in Fig. 5, and the carriages containing the tuft-carrying needles will be evened and the lay will beat in the third shot of filling and recede, and the tuftyarn carriers will again be lowered and moved downward diagonally toward the rear of the loom, passing the tuft-yarns through between the warps intolthe position from which the description was started. The lever c, which is mounted loosely on the stud F2 is connected to an arm of the lever b bya spring-actuated pin or locking device 103, so that when the said locking device is disengaged the loom can be run without actuating the lever c to correct lnispicks or for other purposes.

To provide for adjusting the position of the point of the weft-carryin g needle at both ends of its throw, we have made the elbow-lever I)? b in two parts and have provided the same with an adjusting-screw 200, which is screwed into a lug of one part of the lever and has a nut to rest loosely upon a lug of another part of the lever, and we have also provided two clamping-screws 201 to clamp the two parts of the lever in adjusted position. Fig. 10 is an edge view of the lever 11 b with the end of the portion 1') broken off. We claim I 1. The tuft-yarn nipper, combined with the reed to clamp the tuft-yarn while bent about the weft and before the tuft-yarn is cut off, substantially as described.

2. The tuft-yarn nipper having a series of teeth to enter spaces between the warpthreads and act on the tuft-yarns near their free ends to keep the said ends above the warp-threads, substantially as described.

3. The tuft-yarn nipper, the arms with which it is jointed, the rock-shaft, and springs between the arms and rock-shaft ,to operate substantially as described. I

4. 'A weft-carrier, the carriage to which it is attached, and a guide for the carriage, combined with a pivoted lever and a link con nected thereto and to the said carriage, the sum of the length of the lever and link being just equal to the distance between the pivotal point of the said lever and the point where the said link is jointed to the said oarriage when the carriage is in its extreme outward position, whereby rebounding of the carriage is obviated, substantially as described.

5. A weft-carrier, the carriage to which it is attached, and a guide for the carriage, combined with a pivoted lever and a link connected thereto and to the said carriage, the sum of the length of the lever and link being just equal to the distance between the pivotal point of the said lever and'the point where the said link is jointed to the said carriage when the carriage is in its extreme outward position, whereby rebounding of the carriage is obviated, and with a stop or cushion to arrest the outward movement of the pickerstick, substantially as described.

6. The weft-carrier, the carriage to which it is attached, a guide for the carriage, the link,

the lever c, the elbow-lever b", the shaft 1), means to rotate the same intermittingly, and connections between the said shaft and elbowlever, substantially as described. 7. The power-shaft, a pinion thereon, the gear rotated continuously by the said pinion and having teeth entirely about its periphery at one side to be engaged by the said pinion, a series of teeth 0 a series of blank spaces 0 between the said teeth 0 and flanges 4, combined with a shaft I), having a partial gear thereon, and a locking-plate, to operate substantially as described.

8. The shaft 1), means for rotating it intermittingly, the adjustable link 5', the lever b,

link If, and lever b combined with the lever 0, link 0 and carriage B and its attached needle 13, to operate substantially as de scribed.

9.The tuft-yarn nipper or clamping-bar having a heel 100, combined with a cam, substantially as described, to act against the said heel and lift the said nipper, as and for the purpose set forth.

10. The lever c and the elbow-lever 1'), com bined with a locking device, whereby the said lever a may be left at rest when desired.

11. The tu'ftnipper bar and the rock-shaft D arms a", and springs to normally push the tuft-nipper toward the reed, combined with stops attached to said rock-shaft to control the extent of movement of the said tuftnipper toward the reed, substantially as described.

12. The tuft-nipper bar and the rock-shaft D arms e and springs to normally pnshthe t-uft-nipper toward the reed, combined with stops attached to said rock-shaft to control the extent of movement of the said tuft-nipper toward the reed, and with means toadj ust the stress of the said springs, substantially as described.

In testimony whereof we have signed our names to this specificationin the presence of two subscribing witnesses.

HORACE \VYMAN. FRANK s. WEBB.

WVitnesses:

A. M. WOOSTER, DAVID F. READ.

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