US1566708A - Walter h - Google Patents

Description

w. H. WAKEFIELD REWINDING DEVICE FOR LOOM LET-OFFS Filed July 27, 1925 rPatented Dec. 22, 1925.

Umirso STATES WALTER H. WAKEFIELD, OF WORCESTER,

1,566,7osj

PATENTf-orFFici-z MASSACHUSETTS, ASSIGiv-on To cRoMPToN a xNowLEs Loon WORKS, or' WORCESTER. MassaoHusn'rrs, AcoaroaA'rioN or MASSACHUSETTS. j

nEwiNDiNe nnvicn non Locri tar-corre. f. v-

Appiica'ion fueafzruiy `27', 1925. serial No`."43,5e9.-

To all whom', t may concern.'

Be it known that LVALTER H. WAKE- FIELD,` a citizen ofthe United States, residing at VVoroester. in the county of Worcester and State of Massachusetts,v have invented a new and useful Rewinding `Device for Loom Let-Offs, of which the followingvis a specification. f f

This invention relates to'improvementsin loom let-oflsand more particularly to means for rewinding the warp for the puropose of letting back the fabricy after ar' pick out. i' Y It occasionally happens that a faulty pick of filling will be woven into the cloth without being noticed immediately by the weaver but where perfect cloth is being woven these mispicks must vbe taken out by reversing the weaving operations to pick out all picks laid after the mispick occurred. 1t is 'desirable that the original tension on the warp be restored after the pick out and it is the general object of my invention to provide mechanism which will' move the warpback 'under the same tension that it was under before Vthe pick out occurred. f

It is a further object of my invention to provide such mechanism withan adjustment readily accessible from 'the 'front of the loom, the adjustment operating on the tension whether the same is acting in its normal capacity orto reverse the warp.

With these and other 'objects which will appear as the 'description proceeds, my invention resides in the combination and arrangementv of parts hereinafter described and set forth in the claims. p f In the accompanying drawings wherein have shown two forms of Ymy inventionas applied to the' friction drum ofk a loonivopera-ting in conjunction with a'creel,A

Fig. 1 is a side elevation ofthe loom having the preferred form of invention apf plied thereto, y c f L. Fig. 2 is an enlarged front elevation looking in the direction OfarrOw '2, Figl, ,rf Fig. 3 is a vertical section online 3-3of Fig. 2 on an enlarged scale, Fig. 4 is a view similar to Fig. 2 but showing a modified form of my invention, and `Y Fig. 5 is an enlarged vertical section on l line .5#5 of Fig. 4.

My .invention is .more particularly applicable to looms 'for weaving "cluclnsuch looms havingthe warpgsupply derived. either from a warp beam carried on the loom or froma Creel disposed to'the rear of the loom. Although j my invention is applicable to either source of warp delivery, I havefshown `the saine herein as associated with'a drum suchv as is used with a Creel. `Referring` to Figs."y

1,4 2, and 3 itywill be seen'that Ihave provided a loom frame 10 aty the rear of which is a friction 'drum or warp delivery means 11 pivotally mounted thereon as at 12. 'Secured rigidly to the drum 11 is a bevel gear 13 .which meshes with a bevel pinion 14 carried at the rear end of a shaftal loosely mounted in bearings 16 secured to the loom frame.

The forward end ofl Athe shaft 15 is vreduced as at 17 to delinea shoulder 18, said reducedportion having keyed thereto a fric'- tion disk19 provided'with afriction suri face 20,'such asleather.V The disk 19 rotates with the shaft 15 and is held against motionv along the shaft to the right as shown in Fig. 3 by" engagement -withthe Shoulder 18. Adapted to coact with the disk 19 is a gear 21 having al friction ,face-22 whichl is' normally pressed againstthe leather surfacey shaft has securedftheretoa hand wheel 30 vthe hub 31 ofwhich is provided 'with va pair of. spaced ears 32 between which is normally located the iinger-33 of a weighted lever 341 Saidlever 34: is pivote-d as at 35 to the bearing .blockv 29 so as to beheld against motion transverse' of the stub shaft'28. l

Under normal' conditions the weighted levert'is in the full line position shown in Fig. 1 with the'locking finger 33p between the ears 32. so that pinion 27 iS held against rotation. Gear 21 meshing with the pinion 27 Ais therefore heldagainst rotation to resist frictionally the rotation of disk 19. It is to be understood that ythe latter moves with the drum all, Athe retardation 0f the rotation Qt the drinn being,effectedthrough the frictional contactv between the facesZO and 22. Adjustment of the friction may be accom.- iilielieel bimeeee .et ,este 24. emi eating @e eine .23: r the time, of per om the weighted lever 3-1 is thrown to the dotted Y line position shown ,in Fig. l, thus unlocking Yio the pinion 27 and gear 2lto permit rotationof the hand wheel 30 inthe reverse direction to cause rotation of the friction face .22. disk 19 will therefore be rotated in reverse direntionto .cansethe drum/ll to move. backiiiardly thi'oiieh'tlief beviel' eser end-Pinion. 13 lil, respectively. ltwill be noted that liesleeter tore@ een .be broiie'htyto bear Y'linee the reversing. ofthe .drum than their.

Y which can be transmittedby the. friction. and

f sible to the Weaver.

, other.V being seci11'ed'to some `part'which th tithe friction VYduri-ng the pick otitis.l the eV as that which prevails during normal ya vingllhen thejcloth has been moved 32 'additional movement of the hand. Wheel .Witheet platine undue Strain 1113011 the 111 Else 4L. and 5. differs from the preferred sttutedifor the fece. friction .shown in the tion lface el which contacts with the leather portion 42. AOt.e.,tieni-ble vfriction `tenerme.. As shown'in Fig. 4l s ai'fd vhand is 'anchored at 0.11 end to e iXedlstudetoarriedby a plate ifandhas the other fend connected'by means of ascrexv andwing nut l'fto a lug-,lifalso carried bythe plate 45.

Said: plate 45 is riveted ori otherwise secured'to a; gear; meshing with the pinion 27 as ingt'he preferredform' ofthe invention. The .operation of the modified` form i of the invention is subStential-lythe same as that for'thepreferred form,` adjustment lofy rthe frictionV 'being obtained through' the screw and: wing nut ,4:6 which is vlocated at ythe front of the loom wherezit is readily acces- Erom the foregoing. it Vwill `loe, seen that I have prloi'iided aloom let-back'soiarrang'ed that'the same may be reversed at` the timeof pick out to' causek the Warp to be moved (hack-i wardly by means, ofthe same friction which normally resistsits 'forward` movement, the mea-ns for a'ccomplishingthis result including .twol lf-rict'ion vmembers one of which is normally stationary and` adjustable andl the movesfwiththe warp delivery. v

lHaving thus 'described my invention it will be apparent that. changes and-moditica tions may be "made therein bythose skilled said lugs into operative :positionl in the art Withoiit departing from the. spirit and scope of the invention5'and l do not wish to be limited to the details herein vdisclosed bei. what I-eleim 1S= l. ln. alet-,off mechanism for alonm having a warp delivery means,V apair of'c .oacting friction elements to resist movement of the -warpdeliyery lineans, one of said elements.

being operatively connected vto and moving withfithej delivery means, va lock to hold the other element normally stationary but movable to release saidv second element7V and means to/ reverse the second 'named element' when the lock is moved to'releasing position to canse a'reverse movement ofthe Warp deliverymeans, the oontacting'V portions of the friction 4elements s. being intermediate the Y n Warp delivery means and the means toreverse the second element. Y

2. ln a let-.o-ffmechanism for a loom-having a warp delivery means at the rear thereof, a normally moving friction element nearv vtht-front ofthe loom, connections between the'warp delivery means and vsaidelei'nent to. cause said means and element to move tcgether,l a second normally stationary frictonclement to 4coact with ythe first element to retard `movement of ythe warp delivery means,V a lock to hold the second element normally stationary-but movable 'to release said .second element, and means to move the secondV named element when unlocked to callsea reverse movement ofthe iirst named element andthe warp delivery` means. 4 {lr-ln(aeletj-oilifmechanisml fora loom have ico ing a Warp, .delivery means near therear of the loom, a friction element ladjacent-'the fronet'of-thef loom',connections between said elemen-tand the warp delivery means to cause said element and means to move togethenia second; friction element coacting with the'tirStl named element to retard movement ofnthe warp, delivery meansv a lock to hold .thel seco-ndjfriction 'element normally stationary but movablel to releasesaidsecond element, and means to move said second.. element to 'impart' motion to the warp delivery means through thel irst. named elellf-le.,I1-t;

4.-.' In aletfoff mechanism fora loom having alwarp.; delivery means, a friction e1@- ment adjacent thefront of the loom, 'oonnections b etvveensa'id element andthe Warp delivery..- meansto canse said: element and Ineansto move together, a second'- friction element coacting with the first ,named ele.-

ment to; retard" mo'vementy of the Warp"y delivery means,. alock to hold the second (friction element. normally 'stationary but movable to release .said-.secondelement, means tofmove. said secondieleme'nt to impart motion to thel warpdeliverymeans through the first named element, and means acces+ sibletfrom thefrontl ofthe loom to vary the friction between said elements, said adjustment. being .maintained When the. second the second fricti-on element normally stationary but movable to release the second named element, the latter being movable when released to impart'reverse motion to the shaft and warp delivery means through the first named element.

6. In a let-off mechanism for a loom having a Warp deliveryV means, a shaft having operative contact with the warpv delivery means extending toward the lfront of the loom, a friction element rigid with respect to the shaft and movable with the warp delivery means, a second friction element loose with respect to the shaft, a lock to hold the second friction element normally stationary but movable to release the second named ele'- inent, the latter being movable when released to impart reverse motion to the shaft and delivery means through the first named element, and means readily accessible from the front of the loom to adjust the friction between said elements.

7. In a let-off mechanism for a loom having a frame and warp delivery means supported thereby, a shaft extending from the warp delivery means to the front of the loom, geared connections between the shaft and the means, a friction element rigid with respect to the shaft, a second friction element loose with respect to the shaft and coacting with the first named ele-ment, and a locking lever pivoted to the frame and normally holding the second named element against movement but movable to release y said second named ele'ment,'the latter' when released being movable to reverse the directio-n of the shaft, gearing and .means t through the first named friction element.

8. In a let-off mechanism for a loom having a framev and a warp delivery means supported thereby, a. shaft extending from vthe warp deliverymeans to) the front of the 4 loom, geared connections between the shaft and the means, a friction element rigid with respect to the shaft, 'a'second friction element coacting with the first named element, a locking lever pivoted to the frame and normally holding the second named element against movement but movable to release said second named element, the latter when released beingmovable to reverse the direction of the shaft, gearing and means through the first named "friction element, and readily adjustable means accessible from the front of the loom to vary thefriction between the elements. i

9. In a let-off mechanism for a loom having' a 'frame and a Warp delivery means supported thereby, a shaft extending from the means toward the front of the loom, geared connections between the shaft and the means, a friction element rigid with respect to the shaft, a second friction element coacting with the `first named element and loose with i .respect to the shaft, a gear movable with impart reverse motion to the first named element, shaft and Warp delivery means through the first named element.

In testimony whereof I have hereunto affixed my signature.

WALTER' II. VVAKEFIELD.

Images