US2327987A - Circular weaving loom - Google Patents

Description

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CIRCULAR WEAVING LOOM Filed April 1o, 1941 4 sheets-.sheet 2 @y i I 20.5 4/ ll I 27 76 /7 Juan .Balsachq @M Q www@ 5%WW Aug. 31, 1943. J. BALSACH CIRCULAR WEAVING LOOM 'Filed April 10; 1941 4 Sheets-Sheet 3 E Juan wlsaclf,

Aug. 31, 1943. J. BALSACH CIRCULAR WEAVING LOOM I Filed April 1o, 1941 4 Sheets-Sheet 4 @www M I w Jlza/azsach, v

GRM/mw n Thisinventionifrelatles tof4 improvements `1in s toicreateranaabsolute r'i'ecessityf';of4 "novidingiA omoUnAnwEAvING LooM:A

` Y Baisachfuenos Aires, lrgentina, assigner "BuenosAiresA w ppncatiomnprmo, 194i, srial'NbQsmeslk acircularaiooms'fempioying :shuttles and an essenioom; with' `some .tension'iA compensatingrmecha tial fobject of the `sameisto provide `agnovt-:land i nis'mfor the Warp,threadsfadetptedJtocactfwith fimprovedtypeof `machine of this kind which owgreatspeed and very sensitive in its"opexation j: `inggto" `itsconvenient features ofconstru'ction 5 ,:The second" `diiiiculty .1' havingzlthus yalsobeefn Amidoperation,oiersfsubstantialiadvantages@over overeomeQii-,iv would notwithstandingrberauiusee the apparatus `of n similar"` `types n i heretofore` proi-` less task to try- `t'o;1increase` the :speedfof fcircular `posedand usednf s f looms While not increasing; to awsimilar lor even The `limprovenients"H Whioh. .form thevojhject vgreater"degree, the speedfof fthexweft' stlJpuInothis invention andiwill:.beparticularly,described 140 tion yor devisingamean'sfor Vassuring thefwpasinf'thefollowingrspecication;allowtoffperi'ormv `sageeof jthel weft, so'as tolavoid/thevweftfend ing the operationvof circular looms atgreatlyvin failures inthe `fabric; causedby such; highzspeed i vcreased*ispeeds, upnto .values tofspeedwheretofore at the nish of the,weftthreadwcontainednin the consideredimpossibiein thevpresentifconditions'i shuttle.` i of4 construction of u said circular n looms,` thew'ar- `i5 The invention c also thas1in:viewwotheivobjects lrangement `ofthe W-hoie according to" this invenwhich vwill more fullygbe yunderstooci-fromm con"-` tion being such that `onlyfhy"thesirriultaneous sideration of vthe followingvdescriptionv of; the "mane-of` said `respectiveimprovements;the desired same; i 3 -k t Y n iliereasev ofzspeedinfthe:operationfbfqlthecircular g -Ini order tirati `the invention may beareadily zloomwviihbe attained. i i 20 understood 'andzcarrieduinto"practice without In circular looms of this descriptionQtheispeed difficulty, a preferred embodiment of thenrsame bloyedrmainiy by the following ifactsu nl y 1 t has*beenxrestricted'tdthe limits heretofore Iemhas Abeen :sliown in the: accompanying illustrative t l1. The `inertiaiof` theureedjfo'r adjusting .the *Figure `1 shows onefhalf]"odaverticalseetion`Ak wefts; 1 i :ofa.circu1ar1oom.;- n t; i t

The -insuicient `compensatior-rnof 1 the ten- Figure "2villustrates-"drawn'tofa`1arge1wscafle sional; differences oft the warpf"tlrireadslr when the reed mechanism and yits :corresponding op' formingfthefsheds;and, 'i eration t i i :31.The rather'slow action' oflfgtheweftrstop; Figures `3,H4,aa.nd 5 show detailVV viewso'fgthe `motionand of the stoppageof-` ',theitloom-vati the 35) compensating device `for'controlling the-tension -momentofffinishing them/oft thread; i oft/the warp'threads. i i

n vIginerst ofthesedrawbacksmccursasfa logical `Figure gis across section of.` the 100mg onu-the Ioonfsevquenceiofthe systexris:used4 up tov thisvdate iineVI-fVI ofmFigure 1, and? i y i t for 1 operatinggthe weft adjusting reeds.` Notn Figure '7,fna11y, illustratesfashuttie-and the withstandingi the dividing of saidureedinto `segr .35 `passage of the weft Vby the saine.:4l` Y ments corresponding tolsmalluwidths of, warp In\ allwth'e said `figures;,similarfnumlsersof Y L tl'lafs 11d-theprovisionOffelelrlellfsOf` Small` referencefhave been `used "toi lindicate like-hor size"anddighi'.` Weight; theV inertimof Vthey reeds corresponding parts," i t and 'tha` `(LOTNSDQlding!"SlObS Ory guide l members t `With referencetoFigureHLfitrv/iii befseen that constitutesa seriousobjection,owingtmthe same "40 in accordance with this invention, the -warpJ-tgl,

` absorb thevibrations offa 'mechanism1 such as `tween` the guide `spools Silvandi 4, lrnoufnidQn thegreedwwhicnwithin avery`` short =time,; of resiiient'rings 5` and @and through.t'hehealds fractionslof a, secondrmustpeifonm av reeipror` rTand reedfandjoin;adjacentitdthesringwhere `tionswhich,;in-`tun,a;tend.totemthethreadsand`` two 0f which areperatingfas afimimmum, 51T

Icause `a .prematui'ewear of the elements of the multaneously in the circular l loom;`

mechanism.; i i Therfabric rises -under tension, applied torti-1e j i The secondloflgthedrawhacksreferredto`, isa samehyxthe rollers Il andi, nhand winds-"on consequence ofthefi'st`one,fsince1.When'increas 50 the r011er`|3 Y i t i. i

ingithez-speedflofi-thecircularfloom;afterilovew n `The shuttles are `ofthetypeoperandi[bill-syn;

` cessiomodshedsg,,toelafseriesci successiveviteni siderable speed.

,comingfthenelbifloffthereedsfith WaI'DlhreadS chronized gears; distributednalorigtheincourseg willibeisubmitted;iowingqto:thespeed.of the sus,- and` vtheir motionws, `in` consequenceoffcom im and slacksffofsuchzfrequencm and sneedgas 55 The reedisx-dividedzintoia piufal'itwcfefractions or sections, one of which is'shown at 8 in Figures 1 and 2. The reed 8 is secured by the bracket |4 to the slide |5 which slides on the rods I6, held l in a fixed position by the bracket members l1 andv I8. The roller |9 of the slide |5 is continuallyy pressed against the flange 20 of the cam 2| by the action of the connecting rod 22, lever 23 and spring-24, connected to central supporting elements 25. The element 25, to vwhich all` the springs 24 are connected, is adapted to rotate freely on a stud 26, screwed at 21 on the xed central shaft 28 of the loom. The tension of the springs 24 is adjusted to the desired degree by turning the square portion 29, formed Von an .Y

extension of said stud 26, bythe cap 3|] which nts in the square part 29 and engages by means of a tooth provided thereon, with any of l amount of stress in connection with given values k of speed and weight of the reeds, as it is well known that this Vlatter condition varies according to the greater or lesser iineness of the reed. By this arrangement, thespeed of the mechanism may be greatly increased, since thersame depends on the tension to which the springs have been adjusted. On the other hand, the springs are of great strength and operate with a small amount of displacement, for which purpose they are mounted adjacent to the point of pivotingof the lever 23, in order to increase their length of service. f

' `The mechanism for compensating the tension of the warp threads,.consists of guide spools, mounted on two resilient rings 3 and 4 (Figures 3 and 4), adapted to deform within the guides A32 and 33, so that when forming the sheds (Figure 4) and when increasing the tension v oi" the threads, the ring 4 will shift in an inward direction, rand the ring 3 in an outward direction with regard to the machine.

The circular loom being of the type of two shuttles which move at the ends of a diameter, the resilient rings will become 'ilattened and take the shape of an ellipse (Figure 5) with the longer axis of one of them corresponding with the short axis of the other; and vice-versa. When closing thel sheds (Figure 3), the tension of the threads will decrease and the rings, by continuing their f deformation, willpass to occupy positions reciprocal to thoseshown in Figure 4. In consequence, the compensation of the tensions will be double innature and will be performed by the threads themselves. From the simplicityfof the arrangement and the description of its operation, its efficiency in connection with great working speedsvwill readily be appreciated. l

The reliability of the operation, however, would be less if lthe sections into which the warp is divided, were not fed from bobbins similarly built, containing the same amount of warp and provided with brakes adjusted to the samedegree of tension. The uniform and even winding of the threads of said bobbins does not offer, at present, any dii-liculty, as very perfect warping devices are now in generaluse; in order to avoid the drawback of having to provide a separate brake on every bobbin, said bobbins 2 are so arranged, as indicated in Figures 1 and 6, as to be connected one to 'another by means of angular or bevel gears, or other suitable devices 34, of positive action and supported between two bearings, one

y of which, 35, operates as aV brake, for which purpose its cover or top is pressed against the axle, as by means of springs 36 and pressure rods 31. This arrangement offers the advantage that while all the bobbins are coupled together and each of them is provided, notwithstanding, with its corresponding brake, any unevenness occurring in said brakes will not have effect on the resulting tensions in the thread sections and thus, any twisting will be avoided which would occur if the braking action were concentrated upon one or two points. l

, The weft contained in the shuttle 39, Figure '7, unwinds from the cop 40, passes by thebrake 4| and through the 'eyes of the small lever 42 which, when the weft is broken or exhausted, protrudes outside the shuttle and acts on any one ofthe usual control devices distributed along the course ofthe shuttles. Even if the' device for stopping vthefloom were of the electromechanical type, the

speed of the-loom is such that if the weft is going directly to be woven, a weft failure will occur in the fabric 44. To avoid this trouble, the passage .of the weft is arranged as indicated at 43, so that even if at the instant of the end of the weft thread passing by 42, the controlling device and brake should act with Va certain delay on being actuated by absence of a weft thread, the length of weft thread from 42 to 44 will prevent a failure in the' fabric. It should be noted that this device for the timely Warning of the ending of a weft oiers the advantage, over the devices of similar type already known, that all the thread :is discharged frcm the cop and any waste of weft is thus avoided.

From the foregoing description, the nature and operation of the invention will be understood and no furtherV explanations are deemed necessary for those skilled in the art.

Having now particularly described and ascerv tained the nature -of my said Ainvention and the manner in which the same is to be performed, I declare thatwhat I claim and desire to secure by Letters Patent is: l l Y l. In a circular loom, a vcentral shaft, a vsectional reed, individual slides for respectively mounting the sections of said reed, fixed rods upon which said slidesA are slidablyl mounted, each ofV said slides comprising a roller, an operating cam carried on said central shaft and comprising a projecting iiange, a plurality of individual connecting means connected to saidslides respectively, a stud mounted on the end of said shaft adjustable axially thereof,'a circular support rotatably mounted on said stud and comprising a plurality of individual mounting means. and individual springs respectively mounted between said mounting means and said individual connecting means, saidzconnecting means being adapted under urging of said Springs respectively to press said roller against the flange of said cam; whereby reed vibrations are prevented.`

2. In a circular loom, a central shaft, a sectionaly reed, individual slides for respectively mounting the sections of said reed, fixed rods upon which said slides are slidably mounted, each of said slides comprising a rollerya cam member carried on said central shaft, an adjustable axial carrying member carried by said shaftaxially -adjustably thereof, individual springs for each of said slides respectively, individual means for connesting `a rst end of each of said springs to eachV ofsaid slides respectively, and common mounting meansrotatably carried by said axial 5 carrying member and being adjustably displaceable axially of` `said shaft by adjustment of said carrying member, the second end of each of said springs being mounted on said common mounting y means, whereby said adjustable carrying `membermay be adjusted to cause said cam member to be continuously resiliently pressed by each of said slide rollers respectivelyby the action of said springs.

` JUAN BALSACH.

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