USRE947E - Improvement in looms for weaving figured fabrics - Google Patents

Description

heddles are operated hy jacks elevated and UNITED STATES PATENT OFFICE.

MOSES MARSHALL, OF LOWELL, MASS., ASSIGNOR TO GEORGE GHOMPTON.

IMPROVEMENT IN LOOMS FOR WEAVING FIGURED'FABRICS.

i Speeitieation forming part of Letters latent No. 6,939, dated December li, i849; Reissue No. 947. dated April ""To all ufl/0111, it ritay/ concern: "QBe igknown that I, MosEs MARSHALL, of .'Iiowellf, iu the State ot' Massachusetts, have invented a new and useful Improvement in .f Looms for fearing Figured Fabrics, of Wlueh 'the following is a fail, clear, and exact de seription, reference being:r had to the accompanying drawings, making part ot'I this speci- Figure l is a i'ront elevation of a loom with the said improvement applied thereto; Fig. 2, an elevation of one end, Fie. 3, an elevation ol' the opposite end, and Figui is a vertical section taken at a plane justin iront of the cam-shaft, and parallel with the front of the loom.

' The saine letters indicate liire parts in the several figures.

My invention relates to improvements in that elass' of looms i'or weaving figured and fancy fabi-ies in which Vaseries ot' leaves of depressed oy a litter and depressor as their position is determined to suit the design to he woven bya pattern-chain, or any of the known equivalent devices for determining the pattern ,'and the ohjeet of the first part ot' my invention is to avoid moving any ot the leaves of heddles` which are `not required tohe moved for the production of the design during any part of the operation, so that the movement ofthe lieddles and warps in closing' and'opening the sheds shall be limited to sue-l1 of the warps as are at the time actually required tor the produetion of the design or face of the fahr-ie; and to this end this part ot" 'the said .invention consistsincombining with the series otljaeks that lit't and depress the lea-ves of heddles, with a lifter and depressor for lifting :indd depressing thejaeks, and with a patternehain or other equivalent deviee for placing the 'aeks in position to he lifted or depressed, a. mechanism for holding any o't the jaelis either in their elevated'or depressed position, when the pattern-eliain or equivalent device does not indicate that they are required to he shifted forl the produetion ot' the fabi-ie; that is at the time being woven; and the second part ot" my invention, which relates to the method o1l lifting and der-messing,` the jacks by what arekuowu lifters7 andL depressors,77 consists in impartinganirregular motion tothe 24, leso.

litters and depress-ors by means ot' eccentric oogl gearing, so timed relatively to the motions of the loom that the lifter and depressor shall move with the greatest velocity at the time the warps are erossing to close a shed and open another, the period ot' so` closing; the shed being at or about the time the lay beats up the weft-thread, so that the warps shall lieved by the haelt movement ot' the lay. In` thisvway afmueh closer fabi-ie can he woven than hy crossing the warps as the lay returns, To ett'eet the purpose so indieated, it is important that the heildles should be operated rapidly at the time of beating up the weft-thread, as the weit-thread should be forced home before the shed eloses, and the crossing; ofthe warps should take place during the instant oi" time that the lay stops to return The detailed eonstruetion et' the several parts above referred to, and their eonneeted operation, `are explained in the sequel 5 but it will be necessary, in order to avoid eonusion, to iirst re't'er to the main parts ot' the `looin,"\\'hien are old and in eommon use.

'A in the several drawings is the main iramcwork ot" the machine.

B is the driving-shaft. G C is the warp-beam from which the Warpthreads pass overthe smaller roller, l) D, set just above.

E is the lay, with its reed F and shuttleiooxes G G. Over eaeh ofthe said boxes is a picker-rod, Il ll, on which the piekersl I slide t'orward and back to throw the shuttle.

K K are. the pieken.' levers, or arms which move the pickers, said levers being operated from the cam-shaft L through the medium of the connecting-rods M M and vertical arms N N, extending,- up from the erosssha'l't O O. These cross-shafts are rocked so as to move the pieker-arms by means oi' their hearing'- plates l l?, on which the cams on the shaft L (giurate, in a manner whiell is weil known t0 those acquainted with (heart otl .veavine'.-

Q (Ll, Fig'. 1, is the cleth-licam on whieh the woven.

R 1s the shalt whieh drives thelay by means ot' the trank-rods S 5,1" and Ii. This shaft also operatesthe apparatus for working elose upon the weft-thread before it is re- Vfabi-ie is wound d tiring the proeess of being 'jacks and at the required height to hold the l from a corresponding bevel-wlieel, g,on ahori-v jacks in the required elevated position, and the other series, q, co 'responding` with the `shoulders i on the inner prongs, and so low as to hohl thejaclis down to their lowest position.

the latch of a door. The shouldersi t' are lieveled in like manner, but on the opposite face. The series ot' latches p are tit-ted to and are capable of sliding freely in abar, r, of the frame ci, and the series q in like manner in a 'similar bar, s. The bars r and s are hollow,

and within each is mounted an arbor with a j wing, o, which is niade to bear, by a spring coiled ou the arbor, against a spur on each ot' the latches. In this way all the latches are held in their required position, ready to spring back when the bevel ot' the shoulders i' ot' the jacks come in contact when moving in one di rection, and to spring out to hold thejacks in position, Whether elevated or depressed, as the zontal shait, which carries au eccentric spnr- Wheel, It', that receives motion, by aninterinediate eccentric wheel, i from a nother eccentricl wheel, la', on the shalt lt, this lutter shaft de- ,Both series, p q, are beveled on one tace like l case may be, the seriesp being* to hold them in their elevated position, andthe other series,

c, to hold them in their depressed position.`

When held in their elevated position, any of the jacks will remain so until they are t'orced inward by roller-cams, r1', on the patterirchain,

which are broughtaround to act on them, and

when any of them are held in the depressed position they-Will remain so until some section 1 `ot" the chain Without roller-cams in it comes opposite to them, and then they will beliberated from the latches by the tension ot' the oblique rod a', which will draw them outward, ready to be elevated.

It will be obvious that this part ot' my invention is not dependenty upon the use ol' a patterircliain, as it can be used in connection with any other device 'ordeterniiniiig the design to be woven by shifting thejacksor their equivalents into position to be elevated or de pressed. Nor is it dependent upon the usent' chains for carrying1 the lifting' or depressing bars in a continuous circuit, as itis equally applicable to looms in which the ,iaclts are elevated or depressed b y thc well known reciprocating; lil'tersand depressors, as in the welt known Uonipton loom. Nor is it dependent upon the t'orin ot' ,lacks here-in f lescribed, as these may be greatl)vr varied without depart ing from the principle or inode ot' operation resulting i'roiu the introduction in a llg'uiiiigloom o t' this class ol' a mechanism i'or holdingsA thejacliseiiher in an elevated or depressed position', so long;` as the design o|` the laliric does not require them to hc shil'ted, and although but one inode oiapplyine this part ot' the said invention is herein descrilnfd, lilleall other inventions, the inode olA applical ion may bc greatly varied without departing' l'roin the principle or inode of operation which dislin guishes it li'om all other things bel'orc known. Y The bevel-wheel d on the shalt o, which gives motion to thc elevator and depressor liars llt', receives inolion trom a bevel-wheel, c, on a vertical shalt, wlfilh in turn carries another liev1 ^.l\\'lu:el,j", that rece-hes motion riving niotion from the cam-shaft L by c0g`- wheels m n at the opposite side of the loom. The object ot' this eccentric rear-ineT is to give a varyingr motion to the liter and depressor bars l it, so that in shedding` the warps the motion shall be quickest when thedescending and ascending wai-ps cross each other, and this, as represented, takes place just as the lay beats up the weft, so that the warps shall close itin before the reed leavesit. By means of this a much closer fabric can be woven than it' the lay is permitted to move back before the crossing oi' the arps. The pattern-chain, as it is termed, is composed oftwo endless chains, o o', between which are stretched the crossrods ppp, on which the circular-cams or rollers q" g q are arranged with interposed. washers, so that theyean be shifted along on said rods to vary the pattern by oilieratingon diti'erentjaehs against which they press. This pattern-chain, with its rollers and rods, is hung over and istui'ned with the shalt if" i", Fig. 2, which shaft is revolved oy means of a ratchet-wheel, s', on o: e end 'ot' said shaft, operated by the catch 1/,said catch being moved b v a eranlirod, n w. (Shown by dotted lines in Fig'. 4.) Une end ot' this crank works in a. slot ot'oiie arm ot' a rightangula r lever, v" vf, to the other arm ot' which the catch t is connected, as shown by dotted lines in said Fig.l t. The other endot' the cranlerod is connected eccentriealtyY Ito the face ol.' the gear-wheel it', which. receives motion from the `g'ear-wheel a," on the upper shalt, o' o, which carries the litter and depressor bars l lr, as hereinabove explained. The motions ofthe patterirehain arc regulated by the notched wheel yf, on the front end of as shown cleat-l)v in Fig'. l., It now only remains to describe the eveiiei',as it is termed, which worhs with the lieddlc or harness lev ers soy as to assist. in shittingl the sheds and to keep said levers in accurate position for the operation ol' the cams. This evener consists of two rollers, te' l', which. are set and have bearings on the toi-hed ends tz d'ol' t-wo liorizontal liars, c'ez, said bars being arranged so as to move l'orward and hack in proper-guides or holes llornied in the nprin'htsand curved-supports/"igt, attached tothe top ol.' the frame-work. c. 'iliese rollers press against the outer ends oi` the -upper harness-levers, l l, which are beveled l'or the purpose, `as shown in Figs. l and. t, and, as will be obvious, serve the purpose, as hereinafter suege'fslied. A reciprocatine' rectilinear motion is imparted to this eveneil hy nicansiol' thel crank-arms li." lift, on opposite ends oi" theshal't 1? ii, having proper bearings dept-.udine l'roin the traine-work ci, said crank-arms being.;l attached lo one end oi' the connecting-rods k2 It?, the other ends of' which rods are connected to the sliding bars c2 ci', as'

shown in l. The Shaft i? is Tibmte or roekedso as to give the requisite motion 'to the eveuer chipiigh the medium @if the seveiai parts aranged or eenneete, s above dese'ribed by means of the crank-arm Z2 emi emineeing-ied mgiilie liowei en@ of W191i cia is' are in the machinery ier liiiving .'tlieg'aeks.

Iiai'- eai'ui iik my inveeieiiyziiiii esire te secure by Let-iem- Paten, iam

series'eeaves of hedies; ,and Witbfheiiter an d degiiessoiraiid putterii-ebziin, or ereg: equivi i i i i i i g l 1 'aient ppa-irius for determining the ptter, si meeeis'm *F01* homing' die jacks eithei1 in their eieed er` depi'essedfpestien whennob Tequired to be operated, substziuiaiiy as and orthe purpose specified.

.,iaiiy auch as herein deseiibed?` te the jaeks by ineens, of eeeentiie cog-Wheels,y eubstzliitialy es and i'or the purpose speeied.,

l MGSES MARSHALL.

iitnesses f y DAJ/in LANE,

'WARREN ALDMQH.

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