US1737743A - Loom for weaving knotted pile fabrics - Google Patents

Description

Dec. 3, 1929. F. WALTER?.

LOOM F'OR WEAVING KNOTTED PILE FABRICS Filed Apri14, 1929 5 Sheets-Sheet www Dm. 3, W29,

F., WALTERS LOOM FOR WEAVING KNOTTED PILE FABRICS Filed April 4, 1929 Dec. 3, i929. F. WALTERS 1,737,743

LOOM FOR WEAVING KNOTTED PILE FABRICS Filed April 4, 1929 3 Sheets-Sheet 3 Fig Fig. 7. Fig. 5.

maw/V Patented Dec. 3, 1929 UNITED 'STATES PATENT OFFICE FRANK WALTERS, OF KIDDERMINSTER, ENGLAND, ASSIGNOR T THOMAS BOND' WORTH & SONS LIMITED, OF STOUREOBIT, ENGLAND LOOM FOR W'EAVING KNOTTED PILE FABRICS Application led April 4, 1929, Serial No. 352,455, and in4 Great Britain February '9, .1928.

' means are provided for presenting the tauft yarn 4and for 4d'efleeting the same across warp threads prior to cutting and looping upon the warp threads.

My invention is applicable to `certain types of Axminster looms and when applied thereto the tuft yarn is caused to encircle the warp threads, the ends being passed between adjacent warps, which operation iseffected in a much shorter time vand more readily than heretofore; also, the tufts may be formed by two -or more cycles of tuft presenting means, when the wa-rps are so close as not to admit of the application of the tuft yarn to adjacent wai-ps, particularly when the warps are so close together as to admit of a simultaneous presentation of adjacent warps.

' The invention is applicable to a loom of the Axminster type and I provide such loom with novel means for looping the yarn which makes the Vtufts about the warp threads and employ for such purpose a series of yarn presenting blades which are arranged across the loom, each of the blades having warp deflecting means with laterally inclined tips, operating` to deflect the vertically stretched yarn across or about two or more warp threads f previous to the yarn bein-g cut and looped Lil) about said threads'. In accord with my invention, the yarn presenting members' have depending portions which receive and hold cut yarn tufts which are carried into or be tween the warps by deiiecting portions of the presenting members so that the tuft may be seized upon the warp threads.

The invention further consists in mounting the yarn presenting members upon arms whereby a series of such members may move forwards and backwards, the arms or mounts being pivoted to a lever in such a manner that the yarn presenting members will be restricted as to angular movement when swung downward toward the warp threads; also to provide the support for the tuft yarn presenting means with mea-ns whereby the position of the same may be changed to function alternately.

Among the advantages of this invention, it may be stated that the knotti-ng operations can be done simultaneously in a much shorter time than heretofore and, when desired, Vknots may be formed in two or more cycles in those cases where the pitch of the warp is too `close to admit of their being done simultaneously.

In the drawings,-

Fig. land Fig` la show a side elevation of an Axminster type of lloom with my improvements applied thereto, only those parts of the loom being shown which .are necessary t0 show the application of the invention;

Fig. 2 is a side elevation of the deiiecting member;

Fig. 3 is a cross section on 'the line -a' of Fig. 2;

Fig. 4 is a plan view projected from Fig. 2;

Figs. 5 to 8 are views illustrating the positions of the yarn tuft as it is being doubled over two warp strands by means of the deflectingand doubling blade illustrated by Figs. 2, 3 and 4;

Fig. 9 is a view showing a nipple in engagement with the tuftr yarn; and

Fig. l0 illustrates the form of knot.

Referring to the drawings, the tuft yarn ends l are shown as hanging down from a bobbin 2 which descends as usual, thebobbin being clamped by any appropriate holding device, while the yarn is being drawn off to the desired length by the upward movement of the bobbin. Figure l shows the upward position of the bobbin 2 before its descent. A pair of levers 3 and l lare movable upon shafts 5 and 6, the levers having crank arms .7 and 8 to which links are attached, which links are actuated by cams that cause the levers 3 and el. to swing on their axles to open and close, after the manner of a pair of jaws. Each pair of the levers maintains clamping bars 9 and 10 which eXtend across the loom below the plane of the breast plate l2 and warpslS.

The deflecting device comprises a row or series of especially constructed blades 14 or deflecting devices which function to cause a portion of the yarn ends 1 to be deiiected sideways across adjacent warp threads 13. Figure 5 shows a tuft yarn end 1 in depending position before deflection, and Figure 6 shows the same after a portion of the yarn has been positioned out of line with the depending portion which engages one of the warp threads.

The blades 14 are mounted parallel upon a base or fiat bar 15 that extends across the loom, the base 15 being carried on pivoted arms 16 which are caused by any appropriate cam gear to oscillate forwards and backwards above the plane of the warp threads 13. 'The number of detlecting blades 14 in practice may be equal to onequarter of the number of warp threads. Each blade or member 14 is shaped to provide a cross portion with depending extensions, one being longer than the other and the tip is curved sideways in such a manner that said tip will divert to one sid-e the vertically stretched yarn 1'with which it comes in contact, op-

erating so that when a row of blades 14 isL moved forward it will cause each piece of yarn 1 to be bent sidewaysv to cross two or more adjacent. warp threads 13, as shown by Figs. 6 and 7, in which instance, at least two warp threads will lie immediately underneath the recessed transverse upper end portion of each blade 14.

After the tuft yarn threads 1 have been cut by knives 17 and 18, which are similar to those used with an Axminster loom, every alternate pair of warp threads will be raised l intoV theupper portion of the blades 14, a

pair of warp threads entering each blade and carrying the end piece of a yarn 1 upon it, as shown by Fig. 7. The construction of the blades 14 is such that half of the warp i threads 13A in Figs. 7 and 8 are unaffected and are utilized to turn down the temporarily upward extending cut end 1A of the yarn, as shown in Fig. 7, by the action of lowering the blade 14 until said end 1A has been carried down beyond the warp threads 13A. Thus, after the blades 14 have again been raised, the end 1A is left hanging down,

the yarn assuming the position shown in Fig. 8. Instead of lowering the blades 14 to position the yarn as shown by Fig. 8, the unaffected warps, if preferred, may be caused to rise np and down. Each yarn thread 1 straddles a pair of warps 13 with the end of the yarn hanging downward. The two operations, one advancing the deiiecting blades 14 and the other raising the warp threads 13 may be effected by a single cam.

The downward ends of the yarn 1 are now ready to be seized by nippers 19, see Fig. 9, and to be pulled up between the two warp threads 13. The loops or knots will now require only to be beaten up to the fell by the The various mechanisms for carrying out the method as above described will be actuated by cams or the like, such as are usually used in some types of Axminster looms, and these need not be described in detail as their general design is well known in the art.

By reference to Fig. 1 and Fig. 1a, it will be noted that the shaft 37 carries a cam 38 which bears against a stud 40 mounted on an upright lever 41 which is pivoted at the end 42 and carries a hinged link 43 at its opposite end, said link also being hinged to a crank arm 44 which is fast on a shaft 45 that carries the blade arms 16.

There remains to be mentioned a further detail relating t-o the movement of the blades 14 which prevents them from assuming an inconveniently steep angle, owing to their mount 15 not beingcarried rigidly by the arms 16 but being hinged to the top of said arms. The hinged mount 15 for the blades 14 is pivoted to a curved lever 50 having a link 51 connecting the lower end of the lever to a fulcrum 52, the link being operated by a cam 53. This arrangement facilitates correct positioning of the blades in relation to the yarn ends upon which they operate.

It has already been mentioned that the tuft yarn strands 1 may be inserted simultacommodate the sidesof the latter and the bent down tuft yarn threads. In the present instance, this is assumed to be the case and the operation of inserting the tuft yarn is divided into two equal phases, so that the tuft yarn will be inserted between each alternate pairs of warp threads during the first phase and `the other half, to wit: the adjacent remaining warp threads 13A during the second mentioned phase. To accomplish this, the row of blades 14 isshifted sideways to a distance equal to the spacing of two warp threads 13 before bringing the blades 14 into service for the second time. This displacement is effected by a cam 56 designed to slide these parts along the shaft 45 on which they turn without in any l way interfering with the movements above described.V

I claim:

v1. In a loom of the Axminister type for producing a pile having an oriental or Turkey knot produced by looping the yarn tuft ends around the warp threads, comprising in part aseriesof yarn deflecting blades arranged across the loom, each of the blades having a laterally inclined tip operating to deflect the vertically stretched yarn across two warp threads, previous to the yarn being cut and knotted upon the said warp threads.

2. The combination as set forth `in claim 1, tuft yarn deflecting members, each having a depending side portion for the purpose of receiving and holding temporarily a out yarn tuft which is carried by such member into engagement with the warp threads and leaving the tuft ends ready to be seized and knotted about adj aoent Warp threads.

3. In a device as set forth in claim l, the combination of a series of yarn deflecting blades operating in unison, a support Carried by pvoted arms, actuating means whereby a Series of blades are moved forward and backward Constructed and operated so that the blades are prevented from assuming too steep an angle in relation to the yarn tuft ends when swung downward toward the warp threads.

FRANK WALTERS.

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