US1823720A - Loom stop mechanism - Google Patents

Description

3 Sheets-Sheet l Sept. 15, 1931. E. F. BALDWIN LOOM STOP MECHANISM Original Filed Feb. 18 1925 Sept. 15, 1931. E. F. BALDWIN 1,823,720

LOOM STOP MECHANISM Original Filed Feb. 18, 25

3 Sheets-Sheet 2 E. F. BALDWIN LOOM STOP MECHANISM Original Filed Feb. 18, 1925 S Sheets-Sheet 3 Sept. 15, 1931.

Patented Sept. 15, 1931 PIA-TENTOFFECE i EARL r. BALDWIN, 'oEGAanNEa, MASSACHUSETTS, ASSIGNC-Ri'TO AMERICAN FIBRE CORPORATION, o GAamiEa, MASSACHUSETTS, A ooaroneaion or MASSACHU;

LOOM sror MECHANISM Original application filed Febrnary'18,"1925, Se'rialNb. 9,958. Dividedand this application filed. May 28, i 1927. Serial No. l94,868.' i v This inventionwrelates to stop mechanisms for: looms anore especially looms forl weav+ ing heavyl relatively stiff strand material such as that made from strips of 'paper *;formed'up intowcord; or twine, this applicatlOILCOVGllllg mattervdivided out from my application Serial No. 9 ,958 filed-February l8, 1925 for: looms which eventuated: lI1-t-0 I harness frames QO-and 41, which are given- PatenttNo. .l 731,369, October 15, 1929; 10 The :strandmaterialii's commonlywound on reels. or spools; and sometimes is knotted to flCllItEllieflVlIlCllllg it'when from breakage or other cause: the length is v discontinuous. As made. inthe fabric, however, knotsin ethe; filling would interferewith'vthe proper layingyofithe picks.v Forzthis reason mechanisnr isproivi'ded according to this invention for automatically:cuttingthe: strand at the knot'b efore it" reaches-the. weaving mecha 2o nism: and for: thereafter stopping the-machine: so that the' strand backiof the knot may lie-brought into. feeding. position; As in the normal runningiof the-machine the reel carrying the filling strand 1s unwinding rapid winding is stopped, this preventing the mo mentum of theeparts fronrcontinuing-such unwindingafter the feeding of thestrand V hngers 66 positioned opposite tothe-so-hd.

.into the shed has ceased;

For a more complete understandingo-f this invention reference; may be had to the accompanying drawings in which i a Figured is a vertical sectionthrouglra loom showing: tie subpotmatter of this invention.

FigureQis a'fragmentary front elevation showin the filling :supply reel,- the knot cutting device, and i the brake applying mech 59 passes about a tension ldevice indicated igenpartly in "section of Figure '5' is --a-.; detail I of airportion' of the erally at A,through a'shedding mechanism 1nd1catedatiB, and through a filling laymg '7 mechanism at C, wherefthe filling'strands The shedding mechanism comprising the lay shown at 60 having 3*1Q8flj6l extending thereacross atits upper end.- -This reed-,1 as bestshown ln'Figures'la-nd 5, comprises a plateihaving vertically extending spaced i slots 63, thereinthrough which the warp strands pass. Positioned against the for- Y wardface of this plate are apairof plates slotted to matethe slots in the reed. The

slots inthe plates 65 extend inwardly from their adjacent edges which, are turned forwardly and then'vertically toward. the'opposite plate .65 so as to form a series of ends of the fingers 66 on the upper'and' lower plates; Thelay 60 extends Isome dis- "tance-v beneath the reed and carries at its, lower end a; substantially channel-shapedguideway 58 arrangedparallel, to the upper guideway. and extending across the machine,

this channel-shaped guideway also having a lengthwiseextending slot 69 in its forward a face similar to the slot of the upper guide-H way. Y

Beyond theends of the lay area guide-- way sections'TO, one of whichyisl shown in;

;Fig-,ure 2,: similar to theguideway 68 and As shown in F gure 1; each-warp strand forming .c'ontinuations at either end of the plates 65. These sections 70 lead to the peripheries of sprocket wheels 75, one of these being shown at the right hand end of Figure 2, a similar sprocket wheel being provided at the opposite end of the lay as shown in my Patent No. 1,731,369 heretofore mentioned. The teeth of these sprocket wheels project into the guideways in position to engage a length of sprocket chain 80 which may be projected by the wheels through the upper and lower guideways in an endless path, a suitable guide plate 811 partially surrounding the-periphery of each sprocket wheel serving to hold the chain in engagement with the wheel. The chain isreceived by each sprocket wheel from one of the guideways, is carried about its circumference and projected into the other guideway to the sprocket wheel at the opposite end. The chain 80 is not continuous but is of a length suflicient to engage its end portions only with the two sprocket wheels at one time so that when it is passed into engagement with either of the sprocket wheels about a substantial portion of its periphery, it is entirely out of contact with the other sprocket wheel. This chain acts to lay the filling and carries a strand gripping 122*which engages a cam slot 123 in a cam member 124 which may be fixed to one face of a gear 125.- In order to hold the cam followers 122 in proper position relative to the cams, the rear ends of the links 121 are suspended on link hangers 135, each of which is pivoted as on a stub shaft 136-projecting from one face of a bracket 137 fixed to the machine. The shaft 49 actuating the harness frames is also driven fro-m the shaft 127 as by intermeshing gears 140 and 141 fixed on these respective shafts. Each of the gears 125 meshes with a gear 126 carried by a main shaft-127 extending across the machine. One end ofthe shaft 127 may have fixed thereon a worm wheel 128.with

'which engages a worm 129 carried by a jack shaft 130. This jack shaft may be coupled, as by means of a sliding clutch 131, to the shaft'132' of a driving motor 133. The cams 124 are so formed that forward and -back ward motions of the lay to beat up the pick and then retract in position to lay succeeding picks through the shed are eflected in suitable timed relation to the remaining operations of the machine.

As the sprocket wheels are movable with the lay in its forward and backward motion, each of these wheels is slidably mounted on a polygonalshaped drive shaft 150 (Figures 2 and 6) between end plates 152, 153 and 1541- which' are carried by the for mounting a supplyof filling strandfromwhich the strand is led to the laying mechanism by which the picks are laid and cut off in succession; Upstanding from the end frame 35 of the machine is a bracket arm 235. At the upper end of the bracket arm 235 and adjacent its rear edge. is mounted a shaft-240 which extends partly across the machine. The outer end of this shaft has fixed thereto a sprocket wheel 241 over which passes a chain 242 which extends downwardly and about a sprocket wheel (not shown) carried on the shaft 127. By this means the shaft 240 is driven continuously from the drive shaft 127. This shaft 240 carries a beveled gear 250-meshing with a, beveled pinion 251 on a shaft 252. This shaft 252 is mounted at its forward end in a bearing 253 fixed to a cross frame member 254 extending between the brackets 235 and 236 and at its forward end it carries a grooved pulley 255 within the groove of .which the filling strand may pass. A disk wheel 256 mounted on a short shaft 257 projects within the strand groove of the wheel 255 and acts to hold the strand in frictional engagement so that by the rotation of the wheel 255 the strand may be drawn off from the supply as will later appear.

After passing about the wheel 255 it is led in dependent loop formation to a position to be grasped and pulled through the venting sudden jerks from being exerted on the main supply of strand material due to the intermittent feed of the strand material into the shed.

The strand supply is commonly wound on a reel or spool, which is mounted to rotate with a brakewheel26labout which passes a band brake 262. This band brake'isfixed at :one :end as'at .263 @to :a bracket 7 arm 2,64 extending upwardly from the cross frame member 254. The opposite -end of this brake band is fixed asat265 toan arm 266 pivotedat its upper end as at 267-at the axis guide-anember275-.mounted on the frame member .254 and -about: a small pulley 2'76 2fi'ijou-rnaled on the bar 271. This bar 271 is pulled away from the reel 260, for this pur pose a spring .277 nbeingshown :as attached atoneend-tothisbar andat" the other end to the frame member &. This spring pulls the:bar 271 in:a direction to impart slight tension to thestrand-between the reel and the feed wheel- ,255 andatithe same time acts toimpa-rt aofrictional drag to the .ro--

tation of the brakefiwheel 262,,counterbal- 39?. ancing this tension on :the; strand. If the strand parts, however, between the reel and V the feed wheel, this 'tensionis immediately released and the:spring-.277 is then free .to

draw the bar -271*-away from the reel,:thus sojpulling-on the rod 269 and applyingithe brake with sufficient :force to stop the rotation .of .the reel. Thus, if the strand parts for any reason, the momentumof the reel is overcome immediatelyzso that :it does not 40"; continue to unwindthestrand which is not being fed to the weaving mechanism.

It sometimes happensthat the strandis tied, if, :forv instance, one :piece thereof is not sufficiently long tolill :the reel, so that lithe winding of the material on the reel may be ifacilitated. It would not, however, he practicable to feed :a' filling strand having knotsfltherein and for this *reasonlprovision is made in this machine for cutting the Sl3ral1Cl :at a knot automatically and tl1en stopping the machine so that the: portion of the strand including the knotmay :becut awaynand the new end of the strand presentedtto .the pick laying mechanism. The

'1knot cutting device is shown .in detail in.

Figure This device comprises-a plate 280 which is carried by the frameunember 254 between thev strand tension mechanism com l ging. 283 therethrough; of' suflioienti size ';at its small 'end to permit 'the strand to pass therethrough but ofinsufiicient size toepermit a knot in the strand as at 284C to pass. The plate 280 also carries, pivotedabout one edge thereto at 285, a knife 286, the

cutting edge 287 of which is pressed against oneface of the plate 282 asby means of a spring 288 fixed at one .end to the knife blade and at the otherend to an extension of the plate280. This spring thus acting on the. knife causes the knife to press against the plate 282 and toswing this plate about its pivot .281 as far as may bepermitted by an adjustable stop screw 2.89 threaded through a lug 290 projecting from, one face ofthe: plate 280. I When the plate 282' isin contact withthe stop screw 289, this plate and the knife are out of parallelism inthe position shown in full lines in Figure 3,:witl1the cutting edge 287 of the knife adjacent to the small end of the coni cal opening'283, but clearlthereof. As soon, however, as a knot such as 28% in the strand is brought against the plate 282 as the strand is drawn bythe feed wheels, this knot being too large'to pass through the opening 28%, causes the plate 282 to be swung away from the stop screw 289, this also causing the knife 286 to swing about its pivot 285 toward parallel relationship with the plate 282 as illustrated in dotted lines. This approachctoward parallelism between these two members causes the knife :edge 287 to pass across the smaller end oft-the opening 283, thus severing the strand close to the knot. J As soon as this severing action takes place the pull previously exerted on the plate 282 by ,the feed of the'strandi ceases, whereupon the plate and knife are pulled back totheir former positions by the spring 288. At the same time 'the tension mechanism comprising the slide 271Jis permitted to be moved by the spring 277, thusuapplyingthe brake to the reel supply andstopping its further rotation. It will be noted that this cutting mechanism .is-

entirely independent of the pick laying member. The strand severing device per'se is not claimed hereln, being disclosed and claimed in my application for patent Serial No. 194,867, 'filed May 28, 1927, for strand cutters, which eventuated into Patent No. 1,721,848, dated July-23, 1929. V c

When the strand'is thus cut at the knot,

iii

or if for any other reasontliestrand should part, it is desirable that the machine shall may find the end of the strand and feed it throughthe several mechanisms as may be necessary to its proper position where it.

stop automatically,whereupon the operator may be grasped on subsequent actuation of l the machine. -Mechanism for efiecting the- .stopping of the machine on the parting of the strand is shown in detail in Figure 5,- its "connection to the drivingunechanism being best shown in Figure 1. Referring to this figure,itwill be noted that the sliding clutch 131, hereinbefore referred to, which is operable to connect and disconnect the motor shaft 132 to the worm shaft 130, may

be moved axially of these shafts to effect such connecting and disconnecting by means of an arm 300 carried by a rock shaft 301 which is journaled in a bracket 302 extending forwardly from a base beam 303 of the machine frame. Also fixed to this rock shaft 301, as shown in Figure 5, is a lever arm 304 to theupper end of which is pivoted as shownin Figure 5 a reach bar 305 extending to the front of the machinewhere it is pivoted at 306 to an actuating lever 307 pivoted at 308 to the lower portion of the machine. This lever 307 is provided with an actuating handle 309 at its upper end. The arm 304 above referred to also has pivoted to its upper end a member 310 having a socket element 311 thereon in which is slidably mounted a rod 312. This rod 312 is connected to -a suitable 'moving poriion of the machine and as herein shown forms the rear end of a bracket member 313 carried by the lay. The rod 312 hasa notch 314 therein and guided through a vertical guide sleeve 315 fixed to or integral with the sleeve 311 is a latch element 316 which may be projected into the notch 314. lVhen so projected this latch member couples the member 310 and the rod 312 for simultaneous motion. The latch 316 as shown is carried atthe lower end of a rod 317 the upper end of which is pivoted to the rear end of a lever 318. This lever 318 is pivoted to a bracket piece 319 fixed to the frame member 254 and at its forward end it carries a depending hook 320 over which the filling strand passes adjacent to guide'roller 325 positioned close to the feed wheel 255. The rear end of the lever 318, the rod 317 and the latch 316 overbalance the forward end of the lever 318 and the hook 320 so that if the strand parts, permitting the hook to rise, the latch 316 is biased to move downwardly when permitted by proper relative axial position of the rod 312 within the socket element 311. The notch 314 of the rod 312 is so positioned that the latch 316 may connect the rod 312 and the socket ele- .ment 311 as the lay starts forward on its beating stroke and when this connection is made byxthe dropping of the latch 316 into pos1tion, the member 310 18 carried forward ly with the lay the rod thus rocking the arm 304 to shift the clutch to its unclutched position, thus permitting the machine to stop when it has beaten up the last strand laid It will be noted that the cutting device is positioned in advance'of the weaving mechanism formin art of the means which leads the strand from the supply thereto so that the cut is made before the strand enters will extend completely across the shed so that the weaving is perfect up to the time the machine stops, and the machine is ready to resume weaving as soonas the end of the strand back of the cut is brought up to and engaged with the pick laying mechanism.

An embodiment of this invention having thus been described it should be evident to those skilled in the art that various changes and modifications might be made therein without departing from its spirit or scope as defined by the appended claims.

Iclaim: I

1. In combination in a loom, weaving mechanism including a'movable' member, a rod having anotch therein axially movable with said member, driving means, a'clutch interposed between said driving means and said mechanism, an actuating member for.

motion, means for delivering a strand to said mechanism, and means acting on the parting of said strand to permit said latch to engage in sald notch,whereby motion of said movable member after such engagement actuates said clutch todisconnectsaid drive means from-said mechanism.

2. In combination in a 100m, weaving mechanism'including a lay, a rod having a notch therein axially movable with said lay, driving means,'a clutch interposed between said driving means and said mechanism, an actuating member for said clutch including a sleeve in which said rod is slidable, a latch in said sleeve movable into engagement with said notch to couple said sleeve and rod for simultaneous. motion, means for delivering a strand to said mechanism, and means acting on the parting of said strand to permit said latch to engage in said notch, whereby motionof said lay after such engagement actuates said clutch to disconnect said drive 7 means including mechanism acting automatically on therparting of the strand to cause movement' of said lay to disconnect said driving means from said mechanism.

4. In combination in a loom, weaving mechanism including means for laying strands, means for driving said mechanism, I

and means for leading a filling strand to said lay1ngmeans,sa1d leading means including mechanism responsive to a knot in said, strand for operatively disconnecting said driving means from said mechanism.

5. In combination in a m, weaving mechanism including means for laying strands, a strand supply, means for leading a strand from said supply to said laying means, said leading means including mechanism for cutting the strand thereat if a knot is encountered therein, and means for disconnecting said driving means from said mechanism when the strand has been cut.

6. In combination in a loom, weaving mechanism including a lay and a strand laying means, means for driving said mechanism, a clutch interposed between said driving means and mechanism, an element movable to actuate said clutch, and means for delivering a strand to said laying means, said deliverying means including mechanism acting on the parting of the strand to connect said lay to said element, whereby sub sequent movement of said lay acts to 'disconnect said clutch.

In testimony whereof I have aflixed my signature.

EARL F. BALDWIN.

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