US1872890A - Shuttle changer loom - Google Patents

Description

Patented Aug. 23, 1932 v UNITED STAT-Es PATENT caricajaueusmn :r. cHEvREr'rn, or WORCESTER, ivrAssAoHrrsE'rrs, ASSIGNQRTO ono arroi A & KNOWLES nooivr woR s, or woncnsrnn, MASSACHUSETTS, A. oonronarro v on MASSAGHUSETTS snnmrr'n onanenn'nooivi Application filed June 11, ssr'seri i no; 543 ,645

This invention relates to. improvements in shuttle changer looms and it is the general object of the invention to provide means to prevent rebounding of a shuttle which falls by gravity to transfer position. i

In a type of shuttle changing loom which has gone into use'there is provided a magazine for supplying shuttles 'of* two i difierent types of filling. A common transfer position 1s provided and the shuttles from the rear stack are pushed to'this position while the shuttles of the front stack fall one by one to the position. I find that there is an occasion al tendency for the falling shuttles. to rebound so that ,they'are not in proper position to be transferred to the lay when the latter is ready toreceive them. The discharge of the falling shuttles is regulated by a pairof devices one of which lies underand acts to release the lowest shuttle of the stack and the other of which moves into frictional holding engagement withthe shuttle immediately above to hold the remainde'rof the stack in position; .This second device insures theretenti'on of the upper shuttles and provides room below the stack for the entry of a guard or the like which moves over ashuttle which has moved to transfer position to resist up- 'ward rebounding movements thereof. The first of the devices which normally supports the stack ofshuttles is-located so as to retain the lowest shuttle somewhatabov'e'the guard,

the effect of this relation being to permit the invention resides in the combination and arrangement ofparts hereinafter described and set forthin the claims;- 7 'In the accompanying drawing, wherein a convenient embodimentof my invention is set forth,

Fig l is' a front elevation of a magazine of a two-cell shuttle 'changingloom made aocordingto my present invention,

22 of Fig. 1, showing thegravity feeding stack with all shuttles supported out oftransfer position, and

Fig. 3 is a view similar to Fig. 2, but with Fig. 2 is a vertical detailed section on linev zine M may have front-and rear partitions 12 i and 13, respectively, between which lies a thin web 14 to define with said partitions front and back compartments 15 and 16., re-

spectively. The rear compartment is sup plied with reserve shuttles which do not primarily co-act with the subject matter of The lowest shuttle of this rear stack maybe positioned by a plunger 17 this invention.

which moves forwardly over a fixed plate 18 to push a shuttle on to amovable platform 19.

The shuttles of the front cell are concerned more particularly with the present invention and they are designated herein as S, S and S2. A shaft 20 is pivoted to the front of the magazine frame and has mounted thereon a retaining hook 21 and a friction holder 22, the

former extending downwardly and being secured tothe shaft byva setascrew 23 and the latter being loosely mounted on the shaft 20 and urged in a direction toward shuttle S by means of a torsion spring 24 interposed between said device 22 and a fixed collar 25 on the shaft. v

When the parts are in the position shown in Fig. 2 the hook 21 willlie under all of the shuttles in the forward stack and a connection between the bottom hook and the friction device 22 will serve to hold'the friction surface 26 of the latter spaced from the shuttle The spring 27 surrounding shaft 20 tends normally to hold the hook 21 in the position shown in Fig; 2. A Wire 28 is operatively connected to an arm 29 secured to the shaft 20 and is effective when lifted to rock the hook ment of the hook is accompanied by a corre sponding movement to the left of the device 22 so that the latter moves into engagement with the shuttle S to support the latter and all shuttles thereabove in'substantially the {a relation shown in Fig. 3. It is to be understood thatas soonas the hOokQl'moves down- 7 wardly'out of holding relation' with respect to the shuttle S, the latter will drop-to the .movable platform.19. .By meansnofldevlces 10 .not set forth. .herein and forming. nopa'rt of the present invention said platform 19 1s moved rearwardly to permit the shuttle S to drop on the lay. V

The matter thus far described.10f itself forms no part of my present invention and is setiforthaherein for the purpose/of illustrating "one use ofmy'invention. I

11in: carrying. :my improvement? into effect. I employ a pair of levers 40 andz41=eaoh,pivotz'o ally mountedon a shaft 42 which happens to .be present in1the' type of loom; to which my invention -is -partioul ar-ly adaptable. The upper .armz 43 of each lever receives theroutward thrust of' a' light compression-spring Q5 4:4: interposed-between said arm and the-maga- =zine frame The lowerfpartiof the. lever :is rovided'with adownwardly and rearwardly inclined surface 45 which -is 'rounded. as at :46- a'nd terminates in approximately: a verso tica'lly'extending-surface. H'Ehe rounded part '46 normally extends slIIliO othe path-of' the shuttle Sand is below the latter as 'shown'in "Fig-.2. When the shaft:.--20=-rocksras. hereinbefore :described :to move hook21- from1under '85 the shuttles ithe'latter will start itsdownward xmovement and will be. in =motionwhenthe front lower edge thereofstr-ikes the rounded surface 46. v[[The springs 4 1 .will thereforebe I v :opposed toi the weight of a moving shuttle an'dwill have very :li-ttle iflanyefit'ect in retarding vthe. latter. .-The ends-.46 of the levers ido not move very fam -assuming: the dotted linerpositi'onz shown in Eig.-3-,.until the shuttle S reaches the platform! 19. A- ny. rebounding whiohimayihave been caused on .the part of the levers by engagement thereof with the bottom 'edgeof shuttleS wi=ll have been checked by the spring before the; top edgefof the shuttle passes-belowthelevers andfor: this reason the 50 =flatrhorizontal bottom 47ofthe levers-40 will be in position to move over thesupper-front edge of the shuttle as soon. as .thela tterPasses thereunder. Anyt tendency." on: the; part of shuttle Sto reboundupwa-rdly from the plat- 5 .form 19 willz'be. checked by the bottoms l7-of the levers 40 andother-mechanism notshown herein but essential .in the oompletion of the shuttle changing opera-tionxmayaact-immediately without waiting for. the shuttle to find its; position or without danger "of-crushing i tom endsof the levers 40 so that thelatter can er located to engage a shuttle moving onto "down which reserve shuttles move bygravity tion device 22 serves to hold the next lowest shuttle in the stacksufiiciently above thebot- 7 move overthe' lowest shuttle without inter- V ference.

Having thus described my invention it will be seenpthatchanges and modifications may be made therein by those skilled in the art without departing. from vthe 'spiritia nd scope of the'inventio'n and: ILdO; mottwish' \to :be limited to the details therein. disclosed, ibut what .Iclaimfis: I 7' 1. In ashuttle:changing'loomuhavingga :cell ;;down which reserve shuttles feed by gravity and a lay to receive a reserve shuttle, a platform 'on which the ;.shuttlesf fall in the course of their changing movement from the cell to the lay, andfyielding meanszprojecting into" the pathway. of; a falling "shuttle :loc ated i above the platform to engage: the top of: a shuttle-on the platform and prevent substam. tial upward motion' of the. shuttle.

;;2..In :a shuttle changing loom -having a cellLdown which reserve shuttles f-eed bygravityiand a .lay to receive a j reserve shuttle,'= a platform on 'whichrthe' shuttles arall in the course of their changing-movement'tfironr'the cell ,to thellay, means-to hold-a='-'stack--of shuttles above the platform'sothat the bottom ofthe lowest shuttle in the stack-is farther above the platform'than the height of the shuttleg and a yielding device located between the said bottom or the-lowest'shuttle' in'the stack and the platform toengage' the top of a shuttlefalling onto the platform and= pre vent substantial upwardmovement" thereof.

' 3. In a shuttle changing :loom'ha'ving a-c'ell down which reserve shuttles moveby gravity and alay to receive a reserve 'shuttle-,-' a platform on which the lowest shuttle in'the cell falls preparatory to movement 'to the lay,

means to support the shuttles in the 0611 so that the bottom of the lowest shuttle' is nor- "mally above the platform, and ayielding rebound preventer normally projectingFinto the path of a shuttlemoving*from"the1 supportingmeans to the platform, said preventthe platform at apoint below the bottom of the lowest shuttle in the stack and' abovethe' platform by a distance equal substantially to the height of the shuttle; the shuttle mow ing to the platform acquiringmomentum' before engaging therebound preventer to. cause the-latter to yield. V

'4. In a shuttle changinglooni having acell and a lay to receive a" reserveshuttle; a'plat- 7 form on which the lowest shuttle in the cell fixed my signature.

AUGUSTIN J. CHEVRETTE.

hereunto af-

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