US2496038A - Warp tying machine for operating upon leased warps - Google Patents

Description

Jan. 3L, 1%" c. B. CRANDALL WARP TYING MACHINE FOR OPERATING UPON LEASED WARPS 3 Sheets-Sheet 1 Filed Oct. 4; 1946 JNVENTOR. Char/es B. C/"q/mafi ATTORNEYS Jan 31, 1950 c. B. CRANDALL WARP TYING MACHINE FOR OPERATING UPON LEASED WARPS 3 Sheets-$heet 2 Filed 001:. 4, 1946 INVENTOR. Char/es B. Crandal/ ATTORNEYS Jan 31, $50 c. B. CRANDALL 2,496y038 WARP TYING MACHINE FOR OPERATING UPON LEASED WARPS Filed Oct. 4, 1946 3 Sheets-Sheet 3 gas 3/ INVENTOR. Char/es B. Cr'cmdafl ATTORNEY-S Patented Jan. 31, 1950 WARP TYING MACHINE FOR OPERATING UPON LEASED WARPS Charles B. Crandall, Rockford, 11]., assignor to Barber-Colman Company, Rockford, 111., a corporation of Illinois Application Qctober 4, 1946, Serial No. 701,381

7 Claims.

The invention pertains to a machine for tying leased warps and it concerns more especially an improvement in such machines permitting the use thereof upon finer yarns.

More specifically stated, one object of the invention is to minimize the strain to which the warp threads are subjected as an incident to the operation of moving the selected threads to be tied into close association for presentation to the knotter.

Another object is to provide a warp tying machine of the type in which the warp threads are preliminarily held in leased relation by the use of lease strings, and wherein the warp threads are transferred in an advantageous manner from the lease strings to the lease rods.

The objects of the invention thus generally set forth, together with other and ancillary advantages, is attained by the construction and arrangement shown by way of illustration in the accompanying drawings, in which:

Figure l is a fragmentary side elevational view of a warp tying machine embodying my invention.

Fig. 2 is a fragmentary plan view of the machine illustrating a preliminary step in preparing the warps for the tying operation.

Fig. 3 is a fragmentary'elevational view looking from the left in Figs. 1 and 2 and illustrating the way in which the lease rods are mounted in a supporting standard in the machine.

Fig. 4 is a fragmentary perspective view illustrating the thread selecting operation.

Fig. 5 is a fragmentary perspective View showing a leasing means whereby the threads of the two warps are arranged in crossed relation for engagement by the respective selectors and illustrating in particular the use of flexible lease elements such as strings in connection with specially constructed lease rods whereby to minimize the strain on the warp threads.

Fig. 6 is a fragmentary transverse sectional view showing the thread selectors in relation to the two warps.

Fig. 7 is a fragmentary side elevational view sets of clamps l2, I3 and I4, I5 so as to be disposed in generally parallel relation one above the other, and the thread selecting and uniting mechanism is mounted upon a carriage I6 arranged for traveling movement on the bed of the machine in a direction transverse or edgewise to the warps. The mechanism carriage is fed with a step-by-step motion toward the new warp, the feed being controlled in accordance with the spacing of the threads of said warp in a well known manner.

Mounted on the carriage I6 is a selector mechanism similar in all substantial respects to that disclosed in said prior patent and comprising in general two selectors l! and 18, one for each warp and respectively arranged to operate upon the threads near the point of crossing thereof. Each selector comprises a pusher 19 having a pair of laterally spaced fingers 20, and a hook 21 arranged for reciprocation toward and from the warp edgewise thereof. The pushers are adapted to engage the threads of their respective warps eccentrically of the lines of crossing thereof. In addition to their reciprocating motion, they are arranged to oscillate so as to shift the fingers 2!] from the plane of one of the crossed threads to the plane of the other in successive cycles, it being the function of the pushers to effect relative separation of the first of the threads from the remaining threads so as to cause the first thread to occupy a position in spaced or separated relation to the remaining threads for the entry of the hook 2| the latter having a pivotal movement so as to be lifted over the separated thread. Upon seizure of the separated threads by the respective hooks, such threads are drawn rearwardly or in a direction away from their respective warps, whereupon they are engaged by a pair of positioning arms 22 and 23 (Figs. 5 and 6) controlled by a cam 230. so as to be brought in close association for engagement by a separator slide 24 and presentation by the latter to a knotter 25 (Fig. 2) on the carriage iii. Since the foregoing mechanism for selecting the threads to be tied and presenting them to the knotter forms per so no part of the present invention, it is deemed unnecessary to illustrate and describe the same in detail.

The present invention provides an improved lease maintaining means for controlling the positions of the threads of the two warps in a manner such as to minimize the strain to which the threads are subjected as an incident to their movement by the arms 22, 23 into close association before presentation to the knotter by the a: slide 24. This lease means comprises two pairs of lease rods 2t, 2? and 28, 29 and associated flexible elements 3E3, 3i and 32, 33 constituting eX- tensions of their respective rods and the invention also provides an improved construction and arrangement whereby the warp threads are transferred from the flexible elements to the lease rods. The lease rods are mounted in a standard 34 of the mechanism carriage and the rods of each pair are disposed on opposite sides of the respective selectors H and E8, the latter mounted for rotation and reciprocation in bores 95 (Fig. 5) in the standard.

For convenience hereinafter, the top surfaces of the rods 25, 2? and the bottom surfaces of the rods 23, 29 will be referred to as outer surfaces, and the bottom faces of the upper pair of rods and the top faces of the lower pair of rods will be referred to as the inner surfaces. As will be observed from Figs. 5 and 6, the two pairs of rods are arranged so that their outer surfaces are spaced apart vertically a distance substantially greater than the normal spacing of the two warps w and w. The increased spacing of such surfaces of the rods as compared to the spacing of the warps is for the purpose of increasing the angle of intersection of the leased threads to facilitate selection by the selectors i? and i8. On the other hand, the relatively smaller spacing of the warps reduces the amount of strain on the threads as will hereinafter become apparent.

In view of the differential spacing of the outer surfaces of the rods and that of the two warps, it is the function of the flexible lease elements to guide and direct the warp threads relative to the lease rods and more especially onto the outer surfaces thereof as the carriage is moved into association with the warps in the operation of the machine. The flexible elements may be of any suitable or preferred material or character. Herein they are shown as Woven strands or cords having their opposite ends secured to brackets 38 and 31 rigid with the base of the machine and associated intermediate their ends, adjacent the standard 34, with the two pairs of lease rods so as to constitute extensions thereof.

Each of the lease rods is removably mounted in the standard 34 and is constructed to permit the passage of the cords through the holes in the standard which are provided for the reception of the rods themselves. As shown, each rod is provided with a cross pin 39 forming an abutment for engagement with the forward side of the standard, and the rear end of each rod projects a short distance from each standard and is formed with opposed grooves for the reception of a bifurcated slide clip 39 which serves not only to hold the rod against axial movement but to hold it against rotation. As shown, one clip 39 serves to engage two vertically spaced rods.

To provide for passage of the lease cords, the rods are appropriately grooved. Thus each of the rods 29 and 28 is formed with a groove 49 in its outer surface, which groove extends throughout the length of the rod. The rods 2'! and 29 on the other hand have grooves 4! in their inner surfaces terminating a short distance forwardly from the front face of the standard 24 for the reason that in this instance the cords are passed from one rod to the other in a crossed relationship as will presently appear.

The lease rods 2? and 29 are especially constructed to permit of a relative iapproaching movement of the selected threads of the two warps as the latter are drawn rearwardly by the spectively of the rods.

selector hooks. For this purpose the rods 21, 29 are formed with lateral enlargements 42 and 43 (Fig. 5) disposed oppositely so as to project toward each other and forming recesses 44 and 45 opening into the outer surfaces of the rods and interrupting the outer thread engaging surfaces of the two rods 21 and 29. The lease cord 3| eX- tends diagonally from its point of emergence from the standard 34 adjacent the rod 29, thence through a hole 46 (Fig. 7) formed in the enlargement 42 and extending in a direction transverse- 1y of the rod 21 so as to terminate in a groove 41 in the outer face of the rod 21 and extending lengthwise thereof. Similarly, the cord 33 after passing through the hole in the standard for the rod 27 crosses to the enlargement 43 of the rod 29 and enters a hole 48 in the enlargement 43 and merging with a longitudinal groove 49 (Fig. 5) in the outer face of the rod 29.

It will be seen that with this construction the cords 3| and 33 occupy a crossed relation adjacent the standard to facilitate movement of the cords relative to the lease rods. The holes 46 and 48 are positioned in their respective enlargements D 42 and 43 so as to position the cords in laterally spaced relation for the purpose of preventing the cords from rubbing upon each other.

Referring now to Figs. 5 to 11, inclusive, as the knotter carriage moves to the right (Fig. 5) in the operation of the machine, the lease strands of the two warps are guided by the lease cords 30, 32 and 3|, 33 relative to their respective lease rods so as to cause successive strands of the warps to pass onto and over the outer and inner surfaces re- In Figs. 4 and 7 to 11 I have shown two successiv strands which for convenience are respectively designated as leading strand T and adjacent strand T. As shown in Figs. 5 and 7, the rods 21, 29 are made somewhat .7 longer than the rods 26, 28. The reason for this will be apparent from a consideration of Fig. 9. In brief, it is for the purpose of utilizing the cords 39, 32 to locate the threads T which are to pass over the inner surfaces of the rods 21, 29 so as to position them inwardly of the tips of these rods and thereby prevent the threads from becoming entangled with said tips. In Fig. 9, I have shown in dot-dash lines at X the position which the thread T of the upper Warp would occupy if lease rod 26 were the same length as its companion rod 21. By reducing the length of the rod 26, the thread T is supported by the cord 30 at the time that the rod 21 approaches this thread. The result is that th thread T is lowered substantially from the position X shown in Fig. 9 so as to insure that it will be positioned for engagement with the inner side of the rod 21. In the same way, the cord 32 positions the threads which are to pass over the inner side of the rod 29. The forward end portion of each of the rods is inclined as at 50 so that as shown in Fig. 7 the rods terminate in relatively sharpened ends.

As the carriage continues its travel toward the warps the leased threads move into engagement with the cylindrical portions of the rods as shown in Figs. 4 and 10, the leading and next adjacent threads T and T having now been guided into engagement with the outer and inner surfaces respectively of the rod 21. As the rods move forwardly relative to the two warps, and the recesses 44 and 45 approach the two threads T and T of each warp, the latter are operated upon by the selectors l1 and IS in the manner set forth in said prior patent and as shown in Fig. 4. In this operation, the threads T are engaged by the pusher fingers 20 so as to separate these threads together with the adjacent threads from the leading threads T which are thus positioned for engagement by the hooks 2 I. The latter then move rearwardly, drawing the leading threads '1 of the two warps along the outer sides of the rods 27 and 29 and into their respective recesses 44, 45, as set forth in said prior Noling patent, the threads seized by the hooks 2! are yieldably clamped thereby. The positioning arms 22 and 23 are then operated as set forth in said patent to carry the threads T transversely in their respective recesses as shown in Fig. 11. As seen in Fig. 11, the selected threads T are now held by the arms 22 and 23 in closely spaced relation for engagement by the separator slide 24 which acts to carry the threads to the knotter 25. Prior to such advance of the separator slide, the threads held by the warp clamps i2 and M are now severed by shearing devices (not herein shown) but continue to be held by the warp clamps I 3, 15. In the advance of the separator slide, the threads are clamped thereby in the manner set forth in Noling Patent No. 2,161,633 and then released by the hooks 2 I.

The next pair of threads selected, namely, threads T of the respective warps, are similarly drawn rearwardly and yieldably clamped by the selector hooks after separation from the remaining threads by the pushers 13. however, the selected threads are drawn along the inner sides of the rods 2?, 29 into engagement with the lateral enlargements 42 and 43 of the lease rods 21 and 29, whereupon they are severed from the warp clamps l 2 and I4 and then engaged by the positioning arms 22 and 23. In this connection, it will be observed that the positioning arms 22, 23 are disposed adjacent the rods 21, 29 at one side thereof, and that these arms are of sufficient length to engage with the threads T so as to shift them with respect to the lateral enlargements (see Fig. 11) into position for engagement by the separator slide in the succeeding operation.

As will be observed from Figs. 5 and 6, the outer .1;

surfaces by the cords 30, Si and 32, 33, some strain on the warp threads occurs. Such strain, however, is relieved when the threads T are received in the recesses 44, 45 of the lease rods 21, 29 so that the only additional strain placed upon the threads as an incident to the operation of the po- 3.

sitioning arms 22, 23 is that incident to the short inward movement from the original plane of the respective warps into position for engagement by the separator slide. In Fig. 11 I have shown both the upper and lower warps, the leading and adjacent threads for the lower warp being designated 1. and t respectively. I have also shown in dotdash lines the positions Y which the leading thread T of the upper warp and the leading thread 13 for the lower warp would occupy were it not for the provision of the recesses Mi and 45. Thus the warp threads T and t are subjected only to relatively small strains in opposite directions successively and in each instance the strain is so small as to be unobjectionable even in the case of fine yarns.

For convenience in threading the lease cords through the standard 34, the lease rods 26, 21 and 28, 29 are formed adjacent the front face of the standard with the recesses 5| intersecting the warps.

In this instance,

grooves 40 and 4 1. By placing a lease cord in the recess transversely of a lease rod and then inserting a wire hook through the rod hole in the standard, by way of the groove 40 or ll in the rod, so as to engage the cord, the latter may be drawn rearwardly through the standard. When the cords have thus been drawn through the standard, their rear ends are fastened to cleats 52 on the bracket 36. The portions of the cords forward of the standard may then be laid on top of the standard preliminary to the operation of preparing the warp for the tyingoperation.

In the preparing operation, a pair of flat lease rods 53 are inserted through the respective leased With the aid of these rods, the operator can eliminate errors in the lease. The rods are provided at their ends with eyes 54 and when the warps have been properly inspected, he inserts through such eyes appropriate ones of the cords 3G, 3! and 32, 33. By drawing these flat lease rods from the warps, the lease cords will be drawn through the respective warps and the cords may then be drawn taut and fastened to the bracket 3'! by means of cleats 55. At its opposite ends each of the lease cords passes through a slot 56 in its supporting bracket before passage to its fastening cleat.

As shown in Fig. 2, the flat lease rods 53 are initially inserted in their respective warps in laterally offset relation to the selector mechanism since it is easier for the operator to manipulate the threads at a point centrally between the warp clamps. The lease cords are shown partially coiled to provide the necessary slack when the bars are withdrawn from the lease and the cords drawn taut and fastened to the cleats 55.

I claim as my invention:

1. In a warp tying machine having means for supporting a pair of leased warps in spaced parallel relation, a carriage having tying and thread selector means thereon movable toward the warps, a pair of thread positioning arms also mounted on the carriage and a separator slide for engagement with the selected threads when positioned by said arms; leasing means comprising two pairs of lease rods non-rotatably supported on the carriage, one pair for each warp, two of the rods, one in each pair, having their outer surfaces spaced apart a distance somewhat greater than the spacing of the two warps and having transverse enlargements projecting toward each other and providing recesses respectively opening outwardly in opposite directions, and a pair of flexible lease elements for each pair of lease rods constituting extensions thereof and extending through one of the warps to hold the threads thereof in leased relation, said elements servin to guide alternate threads of the respective warps onto the outer surfaces of the lease rods, and said selector means being operative to draw the guided threads into said recesses and into the path of operation of said positioning arms for movement by the latter into closely spaced relation for engagement b the separator slide.

2. In a warp tying machine having means for supporting a pair of leased warps in spaced parallel relation, means for selecting threads one at a time from each of the warps and positioning means for relatively locating the selected threads for presentation to a tying means, the combination of leasing means for the two warps including two lease rods non-rotatably supported one above the other and each providing grooved outer thread engaging surfaces spaced apart a distance greater than th spacing of the two warps and lateral enlargements projecting toward each other and providing outwardly opening recesses, and a pair of flexible lease elements lying in the grooved surfaces of the rod and constituting extensions thereof, said lateral enlargements of the lease rods being apertured for the transverse passage of said flexible lease elements so as to permit of lateral relatively approaching movement in said recesses of alternate pairs of warp threads under the action of said positioning means.

3. In a warp tying machine having means for supporting a pair of leased warps in spaced parallel relation, a carriage having a knotter and thread selecting and positioning means, and means for carrying selected threads when positioned by said positioning means to the knotter, the combination of two pairs of non-rotatably supported lease rods, one pair for each warp, having outer surfaces spaced apart a distance greater than the spacing of the two warps en gageable by alternate Warp threads of the respective warps, and flexible lease elements for guiding such alternate threads onto such outer surfaces of the rods, the outer surfaces of corresponding ones of each pair of lease rods being interrupted to permit a transverse approaching movement of the selected threads by said positioning means whereby the selected threads are positioned in close relation for presentation to the knotter by said carrying means.

4. In a warp tying machine having means for supporting two pairs of leased warps in spaced parallel relation, means including a support, a lease rod fixed in said support and having an outer thread engaging surface and a flexible lease element constituting an extension of such surface and serving to guide alternate warp threads thereon, said outer surface of the lease rod being interrupted at a point spaced from said support to permit lateral movement of such alternate threads transversely of the axis of the lease rod.

5. In a warp tying machine having means for supporting a pair of leased warps in spaced parallel relation and mechanism for selecting threads one at a time from each of the warps and presenting them to a tying means, the combination of leasing means for positioning the threads of the two warps for operation thereon by said mechanism including two stationary lease rods disposed one above the other and each providing grooved outer thread engaging surfaces and lateral enlargements projecting toward each other and providin outwardly opening recesses, and a pair of flexible lease elements lying in the grooved surfaces of the rod and constituting extensions thereof, said lateral enlargements of the lease rods being apertured for the transverse passage of said flexible lease elements so as to permit a lateral relatively approaching movement of alternate pairs of warp threads guided by said grooved surfaces into said recesses.

6. In a warp tying machine having means for supporting a pair of leased warps in spaced parallel relation, and mechanism for selecting threads one at a time from each warp and presenting them to a tying means including a carriage having a standard, the combination of leasing means for positioning the threads of the two warps for operation thereon by said mechanism including two flexible lease elements and two non-rotatably mounted lease rods having thread engaging surfaces grooved to receive said lease elements, said rods having portions providing oppositely opening recesses and apertured for the passage of lease elements transversely of the rods, said standard having holes for receiving the rods and the portions of the rods entered through the holes being grooved for the passage of the lease elements, the lease elements being disposed in crossed relation at a point between said recess forming portions of the rods and the standard so that the lease element for one rod passes through the hole in the standard for the other rod.

7. In a warp tying machine having means for supporting a pair of leased warps in spaced parallel relation and mechanism for selecting threads one at a time from each of the warps and presenting them to a tying means, the combination of leasing means for positioning the threads of the two warps for operation thereon by said mechanism including a pair of lease rods for each warp spaced apart horizontally and having inner and outer thread engaging surfaces, one rod of each pair being shorter than the other, and a flexible lease element operatively associated with each rod and constituting an extension thereof adapted to guide adjacent warp threads into engagement with the opposite sides of its corre- Spending lease rod.

CHARLES B. CRANDALL.

REFERENCES CITED The following references are of record in th file of this patent:

UNITED STATES PATENTS Number Name 1 Date 1,147,412 Lanning et al July 20, 1915 1,778,480 Bischof Oct. 14, 1930 1,786,238 Hammer Dec. 23, 1930 2,175,277 Noling Oct. 10. 1939 FOREIGN PATENTS Number Country Date 346,618 Great Britain Apr. 16, 1931 348,993 Germany Feb. 21, 1922 457,084 Great Britain Nov. 20, 1936

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