US1707374A - Whip roll for looms - Google Patents

Description

April 2, 1929. R. G. TURNR 1,707,374

WHIP ROLL FOR LOOIS Filed Aug. 4, 1927 Patented Apr. 2, 1929.

naiTED STATES RICHARD GREENLEAF TURNER,v OF WORCESTER, MASSACHUSETTS, ASSIGNOR' VT0 CROMPTON & KNOW'LES LOOM WORKS, i

PORATION OF MASSACHUSETTS.

1,707,314 PATENT OFFICE.

F WORCESTER, MASSACHUSETTS, .A CR- wiiir ROLL FoR'LooMs.

Application filed August 4, 1927. Serial No. 210,655.

This invention relates 4to improvements in whip rolls for looms and it is the general object of the inventio-n to provide a whip roll having ayielding surfaceto ease the strains which temporarily occur on certain of the warp threads.

In the normal operation of a loom the harness 'motion is likely to keep the warp threads in a state of almost constant movement in order to form successive sheds.

This results in placing the warp threads under strains which increase as the harnesses reach the extreme limit of their movement and it is found in certain classes of goods l5 that the breakage of the warp threads is the ,factor which determines the number of looms which can be operated by a weaver.

In winding the warp threads on the beam it occasionally happens that certain of the threads will he placed under a temporary excess strain and as the beam turns in the loom these strained warp threads will be paid off at a less rate than those which are under normal strain, with the result that the strained threads are likely to break. The whip rolls which are ordinarily employed have a yielding motion, but they do not yield unless the greater part of the `warp threads are subject to a strain. It is found that the whip rolls even of the more sensitive type will not yield if a very small number of warp threads are under heavy strain.

It is an important object of my present invention to provide a whip roll with a yielding surface suoli as rubber so that the threads which aie temporarily under eX- cessive strain. may be embedded somewhat in the surface of the whip roll to relieve the stress. The surface of such a whip roll will be deformed depending upon local requirements.` The whip roll may be mounted for yielding movement as ka whole so that the same can yield should a shuttle be caught in the shed and thus'prevent breakage of a large number of warp ends.

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 in the claims.

In the accompanying drawings wherein two forms of my invention are shown,

Fig. 1 is a sectional side elevation of a loom having the preferred form of my invention applied thereto,

Fig. 2 is a top plan view of a portion of the preferred form ofv whip roll taken in the direction of arrow 2, Fig. 1, on an enlarged scale,

Fig. 3 is a vertical cross section on line 3-3 of Fig. 2,

Figi 4 is a view similar to a portion of Fig. 1 but showing a'modiied form ofthe invention, and

F ig. 5 isa fragmentary rear elevation view taken in the direction of arrow 5, Fig. 4. -f Referring to Fig. 1v is will be seen that I have provided a loom frame 10 at the rear of which is supported a warp beam 11. Harnesses 12 control the warp W while the cloth-C extends over the breast beam 13 and is led downwardly to the take up roll 14. lDuring the weaving of the cloth the beamkll rotates to let off warp and the roll 14 takes up the cloth as it is woven, the harness frames producing the required sheds. The matter thus far described is common and forms no part of my present i `more strain than its neighbors to follow a somewhat shorter path than usual I provide a whip roll, the `preferred form of which is shown in Figs. 1, 2 and 3, as comprising a core 20 around which lies a body of` india rubber or rubbery material indicated at 21. Thematerial 21 is soft-and will yield at any point throughout the length of the whip roll to lessen the strain of any `warp thread which may be under unusual stress.

As shown in Fig. 2 I have indicated at S several points of stress and have shown how the resilient surface of the roll will yield at these points to prevent breakage of the warp threads. y It 'is highly` desirable of ico engaged by the warp threads' shall have a continuous surface throughout its length as wellas to be readily yieldable and these qualities are possessed by india rubber, als 'though any other Haced material which will yield at any desired point along` the length of the whip roll without requiring a corresponding` yielding of other points where the warp is under normal strain will answer the purpose. l find that it is not always the saine thread which breaks but that the breakage distributed throughout the warp, indicating that warp faults are not due t'o any one thread beingA shorter than the others throughout the whole length of the warp but rather to the fact that many of the threads are 4placed under temporary strains when a certain part of' the warp `is ybein-g5` unwound, these strains being relieved and others set up as the warp beam rotates. For this reason the deformed portions of the whip roll indicated at S will not always 'be in the same place.

Forward yielding` movement of the form of roll set forth in Figs. l, 2 and 3 is provided for `by .passing the gudgeon 30 'on each end of the roll through a head 31 carried by a rod 32. The rods each slide in a bracket 33 and are urged rearwardly by springs B4, the purpose of this mounting being to permit the whip roll as a whole to 4move forwardly should the 'entire warp `or any large portion thereof be placed under temporary excessive strain.

In the whip yroll heretofore described the material 2l Iis held tightly to the core 20 but under certain conditions such a roll may 'not be `desirable and Iin order to provide a 'construction wherein the yarn engaging flexible element may be removable and renewable I vuse the modified form shown 1in igs. and 5. As shown therein the whip roll 40 may correspond to lthe usual form of `steel roll but it will `be .provided at each end thereof .with a llanee 4l, one of which `is shown in Fig. 5. il'etween the 'flanges and supported. by ythe roll 'is Alocated a loose Vband lof :such material india rubber indicated at 42, the internal diam-eter of the 4band being in eX- cessof the diameter 'ofthe whip roll 110. By y'this construction the band will creep yerr-mind v"the 'roll Zl() and 'will act to absorb temporary strains 'as is the case with the preferred form "of 'the invention. y'lVhi'le I have shewn'the han/ges el for tlrepurpose ofk restraining improper endwse 'movement 4of the band 42 'yet I do not wish tobe 'limited to this lparti'ieular means for holding said band in proper alignment with `the warp threads. Itis obvious from the modified forni that the -i'nay Ebe turned inside ou/L to present 'a new sur-face itc ithe warp.

From che ongoing it will 'be .that I 4have p'rovided -a "lvvhip roll presenting to fthe warp a surface which can yield at any point throughout the width of the warp to accominodate temporary strains and that the surface in contact with the warp threadsis continuous throughout the width of the warp irrespective of the location orfnumber of deformations therein. It will further 'be seen from the modified form ofthe invention that l have provided an Iendless band which is loosely mounted on a whip roll and capable of creeping movement thereover, said band acting to relieve occasional stresses in the warp and so formed that it may be turned inside out to present a. new surface to the Warp. l/Vhile I have specified india rubber as the material to be used both in the preferred and modi-fied forms of the invention, yet as previously stated any inherently resilient flacci'd material which is capable of df-:formareion at a number of spaced points without vcausing` deformation of the entire length of the whip roll will sullice. Havingthus described "inve invention it will be apparent that changes and modifi 'cations may be made therein by those skilled in the art without departing` from the spirit and scope of the invention, land .l 'do not wish to be lin'iited to the details herein ldiscl'osed but what I claim is:

l. A loom whip roll having a yarn engaging `surface of soft india rubber.

2. A looml whip .roll having` ayarn engaging surface of a material A`composed of soft rubber and wliich is elastieally yieldable to a single thread. f

3. A nloom whip roll having a yarn engaging surface of soft rubber capable of yielding `at any point Ithroughout its length.

4. A loom wl'ii-p roll having a yarn engaging surface formed of material which is elastically yielcilable to la single thread at point throughout the length of the roll independently Vof :the remainder of the roll.

5. In a loom having a supply ofwarp,

`a whip roll over which the .warp einends,.and

`'and fa whip "roll having a yarn engaging-surfacelof fsoft rub er capable while .remaining at rest of relieving temporary excess ttenin any warp thread.

7. A loom 'whip roll having a rotatable engaging -surface `of soft india `rubber.

8. n fa war-p controlling mechanism lfor 'a looin, warp beam, lharness mechanism for the Warp fandla device .between the warp b'e'am fand the harness mechanism `in v.Lon-

tact with the Warp to guide the latter, said device having a surface formed of elastic material Which may be deformed at any point independently of the adjacent point, said surface being yieldable under excess strain to prevent breakage of a single thread which may be temporarily placed under abnormal strain.

9. In a loom having a supply of Warp, a Whip roll having a rigid body, and a band of soft rubber loosely mounted on the Whip roll and rotatable about the latter as the Warp is fed through the loom.

l0. In a loom having a supply of Warp, a Whip roll having a rigid body portion, and a band of elastic material yeldable to and rotatable about the latter and limited as to endvvise motion relatively to the Whip roll by said Hanges.

In testimony whereof I have hereunto af fixed my signature.

RICHARD GREENLEAF TURNER.

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