US2647545A - Stop motion for looms - Google Patents

Description

ug 4, 1953 w. J. BUDzYNA Er A1. 2,647,545

STOP MOTION FOR LOOMS Filed Aug. 6, 1949 I5 Sheets-Sheet 1 22 f1 L 67 21 I 65 25 :"Gg, P/ Il ,I O im E 'T 5* i 26 l D @D l o Q ,n y Q I 64 l 62 wl u 0| HPO@ 'l' III? ,l /l l Il S m Nm INVENToR.

1 19 WALTER .BUDZYN 5B' l BY NAI/PIETER HAMAND g g @47 (www ATTORNEY w. J. BuDzYNA er m. 2,647,545

. STOP MOTION FOR LOOMS Aug. 4, 1953 3 Sheets-Sheet 2 Filed Aug. s, 1949 INVENTOR. LTERJ BUDZYNA BY MAURICE R, FLAMAND A TTORNE Y Aug 4, 1953 w. J. BUDzYNA AL 2,647,545

STOP MOTION FOR LOOMs Filed Aug. 6, 1949 5 Sheets-Sheet 3 INVENTOR.y mmm J BUDZYNA BY MA1/MCE R. FLAMAND Patented Aug. 4, 5719,53

STOP MOTION FOR LOOMS Walter J. Budzyna, East Douglas, Mass., and

Maurice R. Flamand, Central Falls, R. I., assignors to Draper Corporation, Hopedale, Mass., a corporation of Maine Application August 6, 1949, Serial No. 109,036

This invention pertains to improvements in lloom stop motions, and more particularly, to

16 Claims.l (Cl. 139-353) It is a general object of the invention to proyvide in shuttlel-ess looms or looms of a type adapted to draw filling from a source of supply not carried by a shuttle, a simple and effective stop motion adapted to stop the loom either upon failure of the mechanism to l-ay the filling in a prescribed manner or upon failure of a warp thread.

It is a further object of the invention to provide a combined filling and warp stop mechanism, the knock-off actuating mechanism for which is greatly simplified and which functions through a common linkage to stop the loom upon failure of either the filling or warp threads.

It is a further object of the invention to provide simple and effective means for stopping a loom of the type described Whenever a filling thread is broken or fails to be inserted in the shed in a prescribed manner, and which shall function in a very short period of time as is necessary with shuttleless looms or other looms of that type which function to insert filling from an external source of supply.

It is a further obj ect of the invention to provide simplified means adapted to function upon breakage or failure of either the filling or Warp threads in looms of the type described and Which shall set in motion or vary the position of certain elements which function through very accurately timed devices to effect the knock-off function in a precise, but adjustably timed relationship to the movements of the lay and to the movements of the filling carrying instrumentalities.

Further objects will become apparent from the following more detailed disclosure.

In shuttleless looms and particularly in looms employing flexible tapes or other elements moving inwardly of the shed formed within the warp threads and adapted to deposit or lay filling from a source of supp-ly maintained at the ends of the loom and beyond the edges of thefafbric being woven, the problem of providing a filling stop motion is much more difficult than in the conventional flyshuttle loom. It is not practical to,

employ filling feeling forks or other devices at the ends of the shed or adjacent thereto for sensing the presence or absence of the filling as it extends between a shuttle and the warp threads at the shed ends as is the usual practice.` Stop mechanisms for shuttleless looms must be i adapted to function at a: point within the lshed and further, must function after the filling has been almost completely laid in the shed and after at least a partial withdrawal of the filling carrying instrumentalities therefrom. Thus the problem is one much more difiicult than in the conventional loom and must employ devices which function very rapidly and yet which must accurately and faithfully sense the presence of filling without seriously affecting its position or the manner in which it is held within the shed since, if that were to happen, the finished fabric would show marks resulting from pressure of the filling feeling means, that obviously being something which could not be tolerated.

The stopping of the loom must be so controlled that the parts always come to rest at a particular point in the cycle at which the filling carriers will have been withdrawn from the shed and the harnesses leveled. Therefore the feeler mechanism must act within a very short period of time and set in motion or energize certain other parts forming a portion of the complete stopping mechanism without fail so that the loom may be knocked off with certainty whenever the condition of the filling or that of the warp threads is such that attention is required before weaving should continue.

In carrying the invention into practice, filling and warp stop motions are employed which function largely through mechanical means for knocking off the loom as by disengaging the clutch and applying a brake, The mechanisms, however, function electrically to an extent. The failure of a warp thread or absence of filling in the shed is effective to vary a circuit in a manner to energize certain solenoids or 'similar electrical means for 'positioning certain mechanical elements in the path of a periodically movable actuator controlled by cams which accurately time the point at which the knock off shall occur. The warp stop mechanism parts `of which are of conventional type and the electrical and other details of which are well known is connected `Within a circuit hereinafter to be described in greater detail and which function through a solenoid individual thereto to position a detent in the path of the said moving actuator. filling stop motion which is preferably carried by the moving lay and which involves one or more filling feeling mechanisms employing relatively thin members adapted to be projected between the warp threads and to descend into contact with the filling if it is,properly placed, `is interconnected to other periodically moving means which,

" upon failure of the feeling means to contact a The properly laid filling thread, functions to actuate certain switch means or other electrical devices Within the circuit which then control a similar solenoid or other electrical relay device such as may position a similar detent Within the pathway of the moving actuator and will then initiate the stopping movement which, in properly timed relationship to movement of the loom parts, knocks 01T the loom as will hereinafter be described.

The invention will be described in following paragraphs by reference to one preferred embodiment thereof and certain modiflcationsthe disclosure and illustrative drawings being .given by Way of example of a preferrediorm Which-the invention may take.

In the figures of drawing:

Fig. 1 is a perspective view of the right hand end of a shuttleless loom to which the'invention has been applied, this View showing certain details of the .general .arrangement of. the .parts and `the general mannerinwhioh the stoppingmeans has been appliedthereto.

Fig..2 is an enlarged perspective viewof some ofthe stopmotionmechanism which forms a part ofthe more inclusive showing ofI Fig. l.

Fig. 3, is a front elevation of one end of the lay and showing partof the center fork movement lapplied thereto.

Fig. 4 is a. section taken through apart of the loom and showing the mechanism of Fig. -3 as seen from a different viewpoint.

Fig. 5 isa detail viewfshowing to anl enlarged scale the centeriork; switch contacting means illustrated in .Figs 3. .andi

Fie. 6 is a frontelevation of the mechanism hQWIl. il! Figlf 5- Fie.. 'l is. @detail View of a cam, Atrom. which the Cent r tors movement is derived.

El 8 is an. end. view of: the cam-shown in Fie. '1.

.Fig- 9` isa detail View of the centeriork cam.

Fig. 10 is anend view lofvthe cam of Fig. 9 and show-ine the v.angular disposal of the operative sumerge-thereof whichensaee an arm attached to and used forswinging the-center fork Lines to their dierent Positions.

Fig. l1 is a plan view of the stopmotion actuator- 'lever cams showing angular disposal and other details thereof..

Fie., v12l is. a section taken through the vertical center 1in oi Fie- 1.1 and-further' illustrating details/Orth 'cams hewn therein..

Fig. 13 is; a wiring diaeramshowine an electr-ical. Qiruit Wheh maybe employed..

Now referring to Fig. l, the. generalarrangement parts which .enter into they combination will be. brierly described. One Iloom to which the stop1 motion may .he applied is herein illus.- trated, although it .is to be understood that .the invention .appl-ies to conventional looms and -to all typesv of. shuttleless .looms .such as ,needle loom's, looms ernploxlzingflexiblel tapes to introduce the filling, .or to looms employing other filling carriers which may be projected through .the shed, .but which receive. `thefiil-li'ng tofbe inserted Vfrom an external 'source of Supply' and therefore, in most instances, layllng in lengthsY which are not continuous.

The vloom may have loomsides and other structural parts. within which 'are adapted, ,to

function theA various loom mechanisms including a let-off (not n) but by which warp threads geherallvidesiguated by numera1 2|y 4are drawn through heddle. .echanisms `2 2v .operated im any conventonalma ner. and. afabrictake-.upmeaiis (not shown) The filling maintained as a stationary, outside source of supply and herein located within a container 23, one of which is to be found at each end of the loom. is drawn therefrom through a conduit 24 and is so controlled by iilling motions generally indicated by numeral 25 andvvvhich need not be v'described jin detail here, is carried 'into and drawn across the shed to be laid therein as independent or individual picks Yof filling in a manner understood by those conversant with this art. The particular means for introducing the filling comprises at either side of the loom, a flexible tape 26 adapted to be projected into and withdrawn from the shed by an oscillating tape Wheel 21 enclosed Within a casing 2B and actuated by means including a system oi gearing (not-shown).

At one end of the machine a driving motor 29 is mounted'upon a suitable bracket and is connected through a clutch and gearing to drive a main cam 'shaft 30 from which .other parts are .driven or moved 1in timed relationship and in proper synchronism with the various functional parts, thereby to carry out-the weaving steps vin a prescribed manner. Reference is hereby made to co-pendingapplication Serial No. 71,622, filedJanuary 19, 1949, now U..S. Patent No.- 2,604,123, and wherein a loom similar to that herein described is more fullydisclosed.

The stopping of the loom iseffectedupon breakage `:of a Warpy thread or upon failure of the filling inserting mechanismproperly to insert a pick of filling. Within the shed. As shown in both 'Figs. 1 and 2,the actual knocking` off or stopping of the loom is effected through a moving .actuator lever 3'! pivoted at.32 on a bracket or other-support member Saand normally urged by means of a spring,r 3,4 insuch-direction that a follower 35 at the free end thereof 'is lcaused to bear with a denitepressure against the innersurface of a cam disc 36er upon certain camsvl or 38 thereon, the function of these cams being explained in greater-detail hereinafter. ,The cam disc 36 also carries a third cam numbered 39 projectingfrom the-otherwise. circular-.periphery thereof, this cam bearingadeflnite spaced y:relationship to the cam 31. By means of a locking `screw dii, theposition of the disc I35 and'its attached parts may be angularly varied asa whole. The cam 38 isxed to thediscr by means of a threaded vprojecting stemy 4i passing through as1ot-42in the disc and adapted t0 be lookedin `position bythe nut 43. Thus cams 31andv39may be angularly adjusted throughout a reasonable extentr and cam 38 may be. similarly/moved'angularly independently thereof.

These parts aremounted upon'the continuously rotatingcamfshaft 30 and thus make one complete revolution every time a .pick of filling is inserted. Itis .tov-*be understood that the parts just describedvanvd those which, as vhereinafter described, function `therewith may be attac-hesite and A,may be operated by any other moving shaft or element Within the machine which may be conveniently employed. The principles ofoperation rwill remain ,the same.

The. lever al. lvvhich constitutes a constantly moving actuator car-ries acontactmember 44 in the 'form of an.adjustably positionable lbolt head and igadapted-to bernoved vby the cams and 3.8,. Upon failure of a `warp thread, or of a lling thread lto v.be inserted properly, the member ldcontactscertain detents 45. or 66 as the latter are moved to or are permitted toY be moved to agposition in the .pathway of thezcontact vmember 44, Each of the detents is pivoted on a supporting arm 41, detent 45 being pivotedon the pin vor screw 48 and detent `46 being pivoted similarly at 49. This arm 41 is a part of a clutch control lever later. to be described. Each of these detents has hooked or otherwise connected thereto a link generally indicated by numeral 50 and which comprises two hooked wires joined at the center. by an'adjustable clamp or otherwise so formedthat, preferably, the length thereof may be adjusted, the other end of said link being hooked to or otherwise attached within the end of a two-armed lever l pivoted on a cross bolt or other pivot member 52 adjacent the top and offset from the center of a casing 53 within which are housed the coils and other parts including an. armature or core for the solenoid. The lever 5|,extends to the Iother side of kits pivot and has connected thereto a spring shown in Figs. 2 and 13, by means of which the lever and thus the detent are normally retained in an uppermost position, `or at least, in an inactive position with respect to the contact member 44 so that unless one of the stop mechanisms initiates a stopping action, the movement of the lever 3| by means ofthe camsabove mentioned is an idle or ineffective one.

Corresponding parts in the other solenoid casing 54 are not numbered and need not be described since they are identical with, or at least similar to those just described. The two detents 45 and 46 :are thus adapted to be moved downwardly against the tension of the springs 55 Iwhenever stopping of the loom is initiated, the downward movement thereof being limited by a ledge or other stop element 41 which preferably forms a part of the supporting arm 41.

The arm 41, as hereinbefore stated, is actually a part of the clutch operating fork which is integrally or otherwise formed as a part ofan arm 56 in turn pivoted at 51 and which, in effect, is an extension of the curved shifter lever 58, it being understood that both the arm 56 and the lever 58 pivot upon the stud or pivot point 51, and that the lever 58, as illustrated in Fig. l, is connected at its inner end to a link 59, the other end of which is connected to one arm of a bell crank lever 66. 'Ihe bell crank lever 66 may rock on a stud 6| iixed in the loomside or in another rigid portion of the machine and, in turn, is interconnected to the front shipper lever shaft 52 through a link 63 which connects at its lower end to the more or less horizontally disposed arm of the bell crankA lever 60, and at its upper end, to an arm 64 rigidly connected to the shaft 62. Shaft 62 also has fixed thereto the right hand shipper lever 65 and at its Iopposite end, a similar lever (not shown).

In starting the machine, the lever 65, or that at the opposite end of the machine, is merely pulled outwardly thereby moving the linkage just described so that the inner forked end of the'arm 56 is moved toward the end of the machine or outwardly along shaft 3|] to shift a clutch actuating collar which controls the position of certain clutch fingers thereby to engage the clutch for driving the machine. The opposite movement of the parts permits the fingers to move to a different position in which they do not effect engagement of the clutch interengaging and driving elements. The shipper levers, thel clutch itself and the clutch engaging and disengaging `means form a part of practically al1 looms and their construction and `the mode of operation are vwell known tor those skilled in this art. Further description thereof is not necessa here.

The swinging movement of the actuator 3| shifts the parts just above described in the event that either detent 45 or 46 has been displaced to a position to be engaged` by the contactor element 44. Sincethese detents are actually a functional part of .the clutch fork including arm 56 and the fork extension 41, either of cams 31 or 38 pushing against follower 35 and through the intermediary of the contactor 44, will move the fork inwardly along shaft 3U toward the center of the machine a sufficient distance to effect knocking off of the machine by disengaging the clutch, the interconnecting linkage shown in Fig. l simultaneously moving the shipper levers to that position which 'they occupy When the machine is stopped. A brake may or may not be employed, but is preferable that one be used so that the amount of movement or coasting of the loom after the clutch is disengaged may be more precisely controlled and kept near a minimum. Normally a loom of this type may rotate from about one-half revolution to something approaching a revolution and one-half depending upon the condition of certain elements and the speed at which the loom is being operated. It is desirable to keep the coasting movement down to a minimum and also positively to govern the amount Iof travel of the loom after power has been discontinued since it is thereby easier to adjust the cams 31 and 38 permanently in position and to make -certain that the loom will stop with the harnesses in very close to a level or centrally disposed position.

If a brake is employed it may take any one of the forms heretofore found quite satisfactory for conventional looms since it is merely desired to have some retarding influence applied as soon as the power or driving means has been disengaged.

Now having described the novel mechanism by which the loom is lknocked off or stopped when stopping has been initiated at either a Warp stop motion or a filling stop motion, the latter sometimes being referred to as a center fork if it functions within the lateral confines or intermediate the terminal Warp threads as they are separated to form a shed within which the filling may be inserted, the individual stop initiating motions themselves will be disclosed. In Fig. 1 a warp stop motion generally indicated by numeral 66 is supported at the upper part of the rear portion of the loom and, as herein illustrated, is preferably an electrical type warp stop motion. A complete description thereof is not necessary here since the essential features of that part of the stop motion itself are described and shown in U. S. Patent 2,378,895 and involve a series of insulated contact members between which an electrical connection may be established upon release of any one of a plurality of so-called drop wires 61, each of which is supported by one of the Warp threads. When a thread breaks or for any other reason is not present under proper tension, its drop wire moves to a position to establish an electrical contact or connection between the said insulated bars and will thereby complete a circuit through to the solenoid enclosed within the boX 53 and which governs or controls the position of detent 45 in such a manner as to move itdownwardly against the tension of its spring 55 until it is interposed in the pathway o1' the contact member 44, above described. `The stopping of the loom then may be completed as thecam 38 which is` employed for the purposeof enligne 'stopping the mechanism 'whenever `a.-vszarp stop is indicated, moves the actuator arm 3| to carry through-its intended purpose.

Itis obvious vthat va` warp thread mayy breakeat anyvtirne or at 4.any .pointin the cycle-of movement of .the loom parts. VInorderwto :prevent-Leompletion of a `warp. stopexceptfbyrthe .cam 11238, that lis, toprevent completion of :a `warpfstop through the cam .31 which, ofcourse, wouldwbe the rst cam to contactcfollowerfl ifi the warp thread happened 'to iai-1 tust .prior fto fthe .approach .of that l.cam :and after fcam E18-had passed the follower, the loam yfluadjacent cam 321 prevents Athe `detent `45 from-:being drawn downrby the solenoid :until -cam .371 has passedy by follower 35. Cam 39 fholfds :detent E5 in yelevatedfposition whenever lthat cam .underlies .the laterally proecting wire or extension T68,.Figs. .1.and'2.

'Now referring to Figs. 3,14., 5 andV 6.parts-rof the loom `which aiiect stopping .thereof upon failure `of the tiillingltonbe inserted-'properly will be described. The lay :movement for .a loom of this typek `comprisesa :lay beamy :69 vcarried-.by swords i Vwhich Aare .pivotedon .a `rook vshaft H adjacent the llower-part of the'loom and, although itxforrns no v:particular partof the present invention, this lay beam andthese swords may be-sw-ung'itor and iro in proper-lyvtimed relationship .by cams AT2 andl on `main learnfshaft 30, Ythese cams functioning upon' followers atthe ends vof `the"fork-like-farms lTM andv 1v5'vwhiohin turn. are `a part of .the structureto which -the swords FHI are adjustably attached fand' ihy-rrieans of which the :rooking'movement derived from the cams is impartedthroughtothellay str-ucture itself. 'That Slay structure preferably includes, fin ad'ciition-to-the-bearn-=69pa hand-rail and `a :reed .15 forwardly of vwinch -is disposed a raceplate T-l upon "Whiohare ladaptedfto-be supportedin :theirrnovement into Aand from the shedLiorme-dlbyfthe harnessed warpthrea'ds, a tape .and l.tape fheads or .iill-ing .carriers herein generally f indicated by -the :numeral 18, itrbe'ing understood -that allof rvthese parts land-the -particuklari modefof :operation incidental thereto-are thoroughly described in ythe application above mentioned. 1t is also i to fbe understood' that Ithe invention. isv notM a^-t= all l"lirnitede'to ybeing employed invia-loom wherein the lay and-parts incidental thereto `and wherein the filling `itself-is `Ainani-pulated by elements such asiherein-show-n and vas described iin that application -above mentioned.

The --cams 112 and 113-are preferably'of -a -form to ini-party tothe' layfstructure 'an extended Jperiod oi dwell consuming about one-half thefeornplete cycle incidental to inserting -a-pic'k of filling,=tlre remainder of -the'cams being so `'forrnedasfto move `the -layr in fa beat-up mOVementIduringthe' remainder of the -eycle and after theffllingfcarriers have beenrnoved vfrom the `shed yand 4beyond the layfibeam @"9 which-is,4 of course, long enough to accommodate the-'maximum width of iabricto be vwoven and to1provide arreasonable amount of additional supportingv surface at either side 'thereof to which the swords and attendant par-ts may =fbe attached.

The stop motion I devices ythemselves comprise two Vcenter fo-rk assemblies `orrly'one Lof which is illustrated sinceI both aresubstantially 'identical. l-EEach of these -oen-ter forks comprises "a bracket or -holder 119 bolted or Aother-wise attached at lthe vv'front side -of the beam 69 and carrying Wvsm--a Lpivot 188 a plurality of i^=tines =or feeler -iing-ers 8i, 'it being :customary to employ from lthree Sto iive such `ngers, although it vis tobeunderstd ythat the number thereof may wary. These ngers attached to pivot '280 are 4caused lto lmove :upwardly through the warp threadsv-as-illustrated in Fig. 4 at =a-particular `time during the-cycle, but arefat other times maintained in a ldownward position .fwhere they lie within a-slot or indentation Vin .the race .'plate "H, On theirfdownward movement, they :normally 'encounter-:a llingthread which is held between the warp'threads and maintained sui- `ciently taut tov support the tines 28| .against the 1downward Apull of a "tension spring 82 .attached to a-short arm fixed to pivot 80. The lspring is connected at its other end to ahook 82 'extending outwardly from the lower part 'of the bracket or from any 'other convenient fixed element. In the cycle of-foperation :of'these'eenter forks, they are'y moved upwardlyr prior :tothe insertion-of vthe filling, then are-permitted ito'be drawn downwardly :by the vsprings"182.v'vhereupon they :either encounterthe filling ifl it 'is Ipresent and' properly laid inthe shed, or are permitted to -drop cleardown zto the recess inthe race plate inthe` event the viilling-is not 'present and ina prescribed position.

For the purpose of raising the tines, a curved arm 83 forming a part of pivot 80 lis lengaged by a cam 184 `better shown `iin the-detailviews, Figs. 9 and 10, 4which will presently'ibedescribed. `A second yspring 1851s -co'iled about *the ar-m`83 where -it extends outwardly from -the fork pivot and assists in starting the fork downwardly through thewarps quickly; it also tends to-prevent overthrow as the tines `are v.moved upwardly at a relatively-rapid rate\by=the highest lobe on cam 84.

It is to be understood that-the actuallperiod of time available 'for "feelingtlfie viilling is exceedingly small yand that-the partsfmove at a very rapidrate.

These cams `/lilfone for each centeriork, are detachablyXedv-to sleeves iid-which are fin-turn a-d-justably iixed along the length of a rod 81 4vreciprocable lengthwise of therlay fbeam 69. This rod' is carried in bearings `rsuch Ias the bearings 188 aty the lower. parte of the 'bracketslS-andextends toward one -end oifthe beam `t9;therebyto'terminateina connection by which it lis attachedfoirfoperationbyan upwardly ldirected arrnfof a twoarmedrlever pivoted at vQi)andihvavinga horizontally disposed varnilii the outer iiattened -endf-of which rests upon altappet 192 at theupper end of a 'vertically reciprocable'barsBS. This bar is guided adjacent its upper end -in za :bearing F94 connected to 'the swordfli andatits lower endis attached `to asforked `guide. memberfSE :whichfrestrains the .parts-"to axial movement fsince the forked ends thereof engage ateitherfsideorwithiai-:a groove inzafcam hub'v 96 formed as' an integral partei thecarn 9W, these latter parts'being shown irl-detail inligsg'and 8. The forked'guide member .also supports afiolldweriz which bears `.upon the cam .97 and which is preferably a roller mounted von .a bearing `enifending..outwardly from thesaid iorliediguidel 95. A sprinvg-:Srcompressed between-therlower end Cif-bearing .911 and an adjustable collar lill] normal-1yurges the vertically reciprooable vpartsv just described -inia downward direction or in `such:directionas tomaintain engagement between the follower 98 and the cam 91. In operationl ofthe loom-the :swinging movement of the :swordlis .accompanied byfa corresponding y'swinging movement offthefreciprocable bar orrflling #fork :actuatorsince both-v arezpivoted orsw'mgable about the .rockshafft vJl The cam 91 and its hub 96 are freely rotatable uponI the rock shaft and are driven by a chain which passes about a sprocket 02 the hub of which is fixed to cam shaft 30 and about a similar sprocket designated by numeral |03 and fixed to the hub of the cam 91.

Now referring to Figs. 9 and 10, the cam 84 which is adapted to control the movement of the center fork tines 8| and also to prevent movement of rod 81 to its fullest extent in one direction whenever filling is not properly present in the shed, comprises a more or less level or inactive surface |04, a notch and an inclined, elevated portion |06. These cam surfaces function to control the center fork feeler tinesand to set the parts controlled by the shaft 81 to initiate stopping as described generally in United States Patents 1,865,930 and 2,378,240. The'topmost part |00 of the cam engages beneath the arm 83 angularly disposed with respect t-o the pivot 80 for the center fork tines, and thereby elevates the tines to the position of Figs. 3 and 4 whenever the cam 91 lifts follower 98 to move the bar 93 vertically upwardly and, through the lever arms 9| and 89, push the rod 81 to the left against the tension `of a spring |01 engaged between the bearing 88 and an adjustable collar |01', all as shown inv Fig. 3. It is to be understood that two center fork assemblies are preferably provided and that the rod 81 extends further to the left thereby to control the second center fork motion in precisely the same manner that'it controls the center fork herein shown. It is not necessary to show both where the additional showing would merely involve duplication. The cam surfaces |04, |05 and |08 are inclined as shown to provide a better bearing for the arm 83.

The extent of the raised portion of cam 91 is shown in Fig. 8 and it is throughout that angular Dart of the cams rotation that the center fork is held in its elevated position. Upon further rotation of the cam 91, the rod 81 is permitted to return to the right, Fig. 3, under the iniiuence of spring |01, and the tin-es 8| are then permitted to fall under the influence of springs 82 and 85, that particular part of the mechanism being more fully illustrated in the U. `S'. Patent 2,378,240, the tines moving downwardly as the karm 83 follows the contour of the cam surface |08 until they rest upon the filling providing that filling is present in the shed as it should be. In that position, the arm 83 is arrested before `it moves down into the notch |05 so that the return movement of the cam 84 with rod 91 fails to eifect engagementl between the point |08 and the arm 83, so long as filling is present beneath the tines 8|. do fall to a lower position and the arm 83 may be brought to rest on cam surface |04, but that occurs during the beat-up and after' the point |08 of the cam 84 has passed the arm 83 in the movement of the parts'toward the extreme right hand j position. l

In the event filling is not present as the tines 8| move downwardly, they are not arrested as above described and fall into a depression or groove in which they are disposed beneath thenormal surl face of the race plate 11, and simultaneously,the arm 83 follows the surface of cam |98 down to an elevation beneath the point |08 of the cam at thel left hand side of the notch i05. That then arrests themovement of the rod 81 inits returnto4 the right for a sufcient period of time for the stopping cycle incidental to .set in motion.

New referring to a 4 Sansa the ver suing failure to se The tines tically'disposed arm 89 which swings to and frol with the rod 81 and cam 84 has projecting therefrom in a forward direction, a contact finger |09. This finger |09 moves between extreme positions as indicated by dot-and-dash lines, Fig. 5, but when upon lling failure, the cam 84 is arrested by presence of the arm 83 in the notch |05, the parts are temporarily positioned in the full line position of Fig. 5, so that upon the forward or beat-up movement of the lay, this nger |09 engages a plunger ||0 of a microswitch or other switch generally indicated by numeral and which forms a part of the stop motion circuit hereinafter to be described in greater detail by reference to the diagrammatic View, Fig. 13. When filling is laid in the shed in a normal manner, the arm 89 and contact finger |09 return to the full right hand position, and, in that position, there is no effect upon the microswitch so that the only possibility of engagement between the finger andthe plunger or other part of the switch adapted tochange its effect upon the flow of current in the circuit takes place when the cam 84 and rod 81 i the circuit in which they function. Current from` any convenient source is introduced to a primary |4 of a transformer, the secondary |5 of which is grounded at one side at I6 and connects through to the stop motion circuit at its other side, such connection being effected through a switch I1. This switch |1, not shown in any of the other' views, is preferably positioned beneath the left hand knock-off lever so that an extension thereof may operate the switch to throw the current off or to open the circuit whenever the loom is stopped. Then upon restarting the loom the said extension on the knock-off lever, or any other satisfactory control means for the switch, will reset it thereby to close the circuit and to introduce current to the various parts thereof, it being understood that the circuit which is grounded is not completed until one or the other of the stop mechanisms functions.

At the warp stop motion side of the circuit one through the switch 1, it being understood that switch ||1 is normally closed when the loom is running.

The other solenoid 54 which controls the position of its detent in accordance with filling conditions present at the lay as indicated by the center forks is also energized from the secondary I5 through switch 1 and the conductor illustrated. The other end of the coils of that solenoid is connected to a ground through switch |||,'that is,

themicroswitch, which is tripped only when one 11V of the center forks fails tosense the presence of filling at the lay in proper position: preparatory to beingbeatenv into the warp. It ybecomes evident that upon the downward movement of' a drop wire 61 orupon tr-ipping and closingv the microswitchY ||I, that the appropriate solenoid at casings -3 or'54 will beenergized thereby mov-ing thecorrespending detent 125 or 43 downwardly, the loomv andithe lobe 38 made adjustable in the samemanner as has-heretofore beenv described w-ithr-espect to the cam 36, the simple cam disc here being replaced by a cup-shaped member I I-having a hub I Il'attachable and adjustable by means of a set screw to the shaft 30,01"l otherappropri ate rotating element uponv which the camy may beA carried. 1n order to shorten the extending wire' BEY-and tofrender'the action of camv 39'- whichcorresponds to cam 39, Fig. 2, more precise and div rect,- the said cam 39 isA formed at the inner endI of a cylindrical-extension. |25 which mayform an integral or attached part ofthe disc H8'. Thisv cylindrical portion |20 also-= serves toJ enclosev to some extent the cams3'I, 38 and the-follower 35 which functions therewith. InFig. L1. the various` angular extents of cam surfaces which have=been found to functionfquite satisfactorily in-.actual practice have been designated as and; applied .to the several cams. these figuresl are illustrative of one embodiment of the inventiony which` has` been employed in. actual practice, and: are not atV alltlimiting since under different designs for'the mechanism: the timingof certain of the parts may be variedto an extent and therefore the actual-vgures` hereby given by-way of example would necessarily-vary accordingly.

The form of the invention shown and described to this point involves electrical` contact beingA made Yat some point whenever awarp-thread breaks or filling fails to be inserted'properly,`

that electrical contact initiating the` movement of certain mechanism. which eventually causes the loom to stop. It is to be understoodthat the invention may be modified in .such manner as to convey the initialv impulse or movement of parts -which is incidentalto failure ofa. warp thread or filling to be inserted. properly bymeans` That which is wholly mechanical inrnature. means, not hereinl described, wouldtake the-` place of the circuit which includes contact. means, switches, .and lsolenoids energized upon completionof oneof the circuits, and suchmechanical devices would then move the detente |'v or 46, as the case might be,.into position to be engaged by the contact element 44 on the continuously moving actuator arm 3|. Whenever `that 0ccurred, the loom would be stopped in the same manner as hereinbefore described.

Operation During normal operation of the loom thefwarp threads are maintained under sufficient-tension to hold each of the drop wires i'ly inv uppermost position in which event no contact -is made :at the: warp stop motion side ofthe circuit so' that It is to be understood ythat 12 the solenoid enclosed within casing 53 is not energized and the detent is thereforeI held by means of spring 55- in an upper, or, at least, in an inactive position. Detent 46 is likewise maintained in' a position where it cannot be engaged by the contact member 44 which. of course, is periodically moved vunder the action of cams 3'I and 38. Whenever a warp thread fails or for any other reason, one of the drop wires 61 falls, contact isv made within that part of the circuit which is utilized for energizing the solenoid at 53rso-that the warp stop side of the mechanism immediately tends to function for drawing the lever 5| downwardly to position the detent in the pathway of the moving actuator contact member 44. In the event the cam 31 has just passed by the, follower 35, the action of the solenoidis immediately completed and cam 38, when it does engage follower 35, pushes the clutch actuating fork inwardly asabove describedthereby to disengage the clutchv parts and, through the levers 35, 58,5!!and interconnecting linkage, Fig. l., the completion. of the loom knock-off is completedso that the brake, if a brake is employed, will be set thereby tostop the loom more quickly. At that same time or during the movement just above described, theswfitch I I'I, Fig. 13, is thrown toopen position to discontinue flow of current in the circuit throughout the entire stop motion circuit.V

In the event the initiation of the stopping movement due to breaking of a warp thread occurs before the cam 31 had passed by follower 35, thecam .39 functions yto elevate or to mainvtain'in .elevated` position the detent 45 through its engagement Ybeneath theextending wire arm |58.` That assures that the warp stop will not be completed` through the cam. 31 which is actually onlyfor the purpose. of-effecting stopping indicated at the centervfork'or through the filling stopping-devices.

Inthe event filling fails to be inserted properly, such failure being` due to breaking thereof, displacement of the filling along the lay for various reasons.. or for. any other reason of which there maybe several, the tines 8| move downwardly after the inserting movement of the filling carriers and just after they have been withdrawn so that there shall be no interference between the tinesand said carriers, the movement downwardly of these tines as permitted by the receding or sloping part ofthe cam.v 84 continues until the arm. 83 enters the notch |05. At that time the tines` not heldupwardly byv the filling which .shculdbe Vpresent fall into a slot on. the raceway,

as above described.. The constantly actuated rod SIthen is prevented from making acomplete return movement as follower 98 is permitted to be lowered by cam 91, that causing the contact finger |09 to be halted or arrested temporarily in an intermediate position as indicated in Figs. 5 and 6. takes place justas the lay advances forwardly to effect beating-up of thelling and therefore f finger |09 eventually contacts the switch actuator The actual filling feeling movement.

is always timed to the movement of the loom parts so that the drawing downwardly of the detent 46 by the solenoid at 54' occurs just prior to approach of cam 38 or in about the position at which the parts are shown in Fig; 2, therefore there is no possibility of the filling stop indication being completed to stop the loom by anything other than cam 38 which is expressly designed and adjusted for that purpose. The knock-off of the loom parts includes throwing out the switch H1 so that in either a warp stop or lling stop, the entire stop motion circuit becomes dead and remains so until the loom is again started and switch H1 closed as the shipper lever 65 or that at the other end of the shaft 62 is pulled outwardly or otherwise moved to what is its active or loom running position.

To start the loom again after repairing the fault for which it was stopped, it is only necessary to pull the lever 65 or similar control lever to operative position; that then engages the clutch through the positive linkage, disengages the brake, if one is used, and closes switch H1.

This description has made mention of shuttleless looms wherein the picks of filling are inserted from each side. In certain instances filling may be inserted from one side only.v The stop mechanism functions in the same general manner in either case.

The moving actuator has been shown as of the pivoted or swinging type. It may conveniently be provided for movement of other nature, e. g., one in which the actuator slides in a rectilinear or other pathway. It may be positively controlled in each direction of its movement, or may be spring returned.

While one embodiment of the invention has been disclosed, it is to be understood that the invention concept may be carried out in a number of ways. The invention is, therefore, not to be limited to the precise details described, but is intended to cover all variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

We claim:

l. In a stop motion for a loom, a periodically moving actuator, a means to disconnect a source of power from the loom, a detent pivotally mounted upon said 'means to disconnect the source of power from the loom and movable transversely to the directions of movement of said power disconnecting means to and from a position between the moving actuator and the means for disconnecting the source of power so that movements of the actuator are conveyed through to the means for disconnecting the source of power when said detent occupies a position between the said parts, and thread sensing means effective upon sensing an abnormality in the condition of the thread, to move said detent -into said position between the moving actuator and means to disconnect power from the loom.

2. In a stop motion for a loom, a periodically moving actuator, a means to disconnect a source of power from the loom, detents movable to and from a position between the moving actuator and the means fordisconnecting the source of power from the loom, means for sensing the condition of warp threads and other means for sensing the presence or absence of filling properly inserted in the shedy means for normally holding said detents out of a position in which they would be engaged by said moving actuator said sensing means being operable upon indicating an abnormality in either the warp threads or in the filling for moving the detent affected thereby to a position in the path of `said moving actuator thereby to stop the loom` upon a succeeding stroke of the moving actuator. y

3. In a stop motion for a loom, a periodically moving actuator, a means to disconnect a source of' power from the loom, detents movable to and from a position between the moving actuator and the means for disconnecting the source of power from the loom, a circuit comprising a source of current, solenoids, one for one of said 'detents and another for the other of said detents and warp thread sensing and filling thread sensing means each of which is effective upon a solenoid within the circuit for varying its respective solenoid to move the respective detent controlled thereby into the path of the moving actuator.

4. In a stop motion for a loom, a periodically moving actuator comprising a pivoted arm, a contact surface and a follower at the free end of said arm, a cam means engageable with said follower,

a means to disconnect a source of power from theloom comprising a movable member aligned with said contact surface but out of range of the movement thereof, a detent movable to and from a position between the contact surface of the moving actuator and the means to disconnect the source of power from the loom, and thread sensing` means effective upon sensing an abnormality in the condition of the thread, to move said detent into a position between said moving actuator and the means to disconnect power from the loom, whereby on the next `following movement of the actuator by said cam means, the power for the. loom will be disconnected therefrom.

5. In a stop motion for a loom, a periodically moving actuator comprising a pivoted arm, a contact surface and a follower at the free end of said arm and a cam means constantly rotatable and engageable with said follower for moving the actuator throughout a limited angular'extent, a means to disconnect the source of power from the loom comprising a movable member aligned with said contact surface but disposed out of movement thereof, a detent supported adjacent said means for disconnecting the source of power and movable to and from a position between the contact surfaces of the moving actuator and themeans to disconnect the source of power from the loom, said` detent having a thickness such that when moved toa position between the moving actuator and means for disconnecting the source of power, further movements of the said actuator affect the said means to cause it to disconneet the source of power from the loom, and thread sensing means effective upon sensing an abnormality in the condition of the thread, to move said detent into a position between said moving actuator and the means to disconnect the source of power from the loom.

6. In a stop motion for a loom, a periodically moving actuator comprising a pivoted arm, a contact surface and a follower at the free endof said arm and a cam means constantly rotatable and engageable with said follower for moving the actuator throughout a limited angular extent, a means to disconnect a source of power from the loom comprising a movable member a part of which is aligned with said contact surface but disposed out of range of movement thereof, detents supported adjacent said means for disconnecting the source of power and movable to and from a position between the contact surfaces of the moving actuator and the means to disconnect the source of power from the loom and having a thickness such'that whenl moved to a position between lthe'movinigi"actuator and means for disconnectingthe source -ofr power, further movements of the said actuator affect the said means toicauses it'zto disconnect the source of .power from the -1loom,: and thread sensing means `including warp zthread .sensingzandy filling thread sensing devicesfeachf of which is. effective uDOIl Sensing an abnormality vin tsrespective thread for movingfoneof :the said detents into a position betweerrtlfe,moving actuator and the means to disconnect the L source of power from the loom, whereby on Lthe'next following movement of the aictnaton'bysa-id'` cam; means, the loom will loe knockedzoff andstopped.

- "L Infafstop motion for a loom, a constantly rotating shaft, aperiodically moving actuator comprising apivoted arm, a cam means fixed 'to saidishaft and `a wfollower at the free end of said armand engageable byzsaid cam means,`a clutch engaging and releasing means on saidshaft, a knock-off lever including an armand fork engageable with saidv releasing means,v said moving actuatorbeing movable by said cam means to an extent insufficient toaifect the said arm and fork, and-Ja detent positi'onable `between said `fork and movinglactuator and ofsuch thickness as to impart. movementofthe actuator to the fork and clntch'engaging and'releasin'g means to knock on and stopthefloom..

8j- Ina stopnmotion `for a loom, a periodically moving'actuator comprising a pivoted arm, a contact surfacel and a follower at the free end of said armand a-cam'means engageable with said follower, a means todisconnect a source of power from` the loom4 comprising ya movable member aligned with said lcontact surface but out of range ofimo-vement thereof, a plurality of detents pivoted 4'formovement upon vsaid means for disconnectimgV the source ofpower and :movable to and from :a position between the contact surface of the'moving actuator rand a part of the means to disconnect the source of power from the loom opposite to said contact surface and of such thicknessthat when moved to suchposition between the contact surface of the moving actuator and the said part of said means, further movements of the actuator under the influence of said cam means causes a corresponding movement of the means for disconnecting the source of power, a circuit comprising a source of current, solenoids,y one `for 'each of'said detents',-warp thread sensing `means-in said circuit and interconnected therein-'for energizing one said solenoid, filling thread sensing means likewise forming a part of saidcircuit and so disposed therein that upon failure of filling thread to be inserted properly withinthe fabric, that the solenoid in that part of'the circuit controlled by said filling thread sensing means shall'be energized, said solenoids being so disposed and so connectedwith respect to said detents thatupon energization thereof, the said detentsr are moved into alignment with the contact surface of the moving actuator.

9. In. a stopv motion for a loom, a constantly rotatinglshafha periodically moving actuator comprising a pivoted arm, a cam means fixed to said shaft and a follower at the free end of said arm and engageable by said cam means, said cam meansfcomprising a disc-like member, cams fixed thereto and angularly spaced, one of which functions.- to' impart`- movements incidental to stoping-,upon failure of the warp threadand the other. of which-governs stopping movements resulting. upon failureoffilling to. be inserted properlyf a clutch engaging and releasing means on' said shaf.taknock-oif Alever including an arm and Afork engageablewith said releasing means, said moving actuatorbeingv movable by said cams tor any extent insufficient .to contact and vaffect the said armand fork, detentspivoted to said knock-off `arm and fork means and yhaving portions .thereof whichare-engageable by said moving ractuator Awhen thel saiddetents are movedA to aiposition'in alignment with the saidsactuator, said detents being Oia/thickness such that'when interposed betweensthe actuator and the fork, movementsof `the actuator'are conveyed through the detent to the 'fork and vthereby vto ,the engaging and releasing means and interconnections therefrom to the said detents formoving them. from anormallyinactive position to'one inv which they-are interposed between themoving actuator and the -fork whenever an abnormality inthe condition of the :threadis indicated.

l0. In a stop motion'for-afloom, a constantly rotatingshafh a. periodically moving actuator comp-rising apivoted arm, a cam means fixed to said shaft-and a'iollower'at the free end ,of said arm engageable byfsaidzcam means, `an adjustable contact memberatthe said free end of the arm adjacent the'follower, said cam vmeans comprising a disc, cams attached to the side of said disc'adjacent the followerv and aligned therewith; said cams being `angularly spaced', a clutch engaging and releasing mea-ns slidable along said shaft, a knock-off lever including an arm and a fork engageable `withzsaid'slidable releasing means, said moving-'actuator being movable by said cam means to an extent insufficient '.to affect the said 'arm and-:.fork, an extension `to said 1fork and detents pivoted ateither end of said eXtension and having. Contact portions at their ends which terminate ad-jacent the central portion of said extension-and4 in alignment withthe said contact member of said moving actuator when moved to an `activefposition, said detents being of such thickness that: when'movedto active position and contacted by said moving actuator, the'extension and'forlr'willl be moved to disengage the clu-tch andy tovk knock off the loom, resilient means normally maintaining said detents in afposition outof range of said moving actuator, stop motion devices associated withthe warp threads and-with the filling threads and means interconnecting saidl stop motion devices to said` detents for moving them .against the said resilient :means toa position to be engaged by themoving` actuator upon an indication of failure at any one of the warp threads or failure of a filling thread-to be properly inserted.

l1. Mechanism as defined in claim 10, wherein one ofthe said cams attached to the cam disc is employed for movingthe actuator to complete stopping of the loom whenever a warp thread failure is indicated'and the other said cam is employed'for similarl37 stopping the loom upon failure of filling thread-properly to be inserted, anda camadjacent the said cam which effects stopping upon failure of filling, an extension on that detent controlled through the warp thread stop indicating means, said extension being engageable with said cam to maintain the detent out of range of the moving actuator during passage of the said cam which controls stopping upon failure of filling thereby to prevent stopping ofthe loom-when awarp thread failure is indicated,v except by the cam specificallyintended.

12. In a stop motion for a loom having a rock shaft and a lay including a lay beam and swords pivotecl at said rock shaft, a center fork comprising filling thread feeling tines, cam means effective to swing said tines through filling feeling and indicating movements, a shaft movable lengthwise of said lay beam to which said cam means are fixed and by which they are moved, and means for periodically reciprocating said shaft comprising a cam rotatably mounted on said rock shaft, means for rotating said cam, a bar guided for movement substantially lengthwise of one of said swords adjacent said cam on the rock shaft, a follower on said bar and in contact with said cam, and means interposed between said shaft and bar and supported upon the lay sword for imparting movements of the bar to the shaft.

13. In a stop motion for a loom having a rock shaft and a lay including a lay beam and swords pivoted at said rock shaft, a center fork comprising lling thread feeling tines, cam means effective to swing said tines through lling feeling and indicating movements, a shaft movable lengthwise of said lay beam to which said cam means are fixed and by which they are moved, and means for periodically reciprocating said shaft comprising a cam rotatably mounted on said rock shaft, means for rotating said cam, a bar and means for guiding said bar in substantial lengthwise alignment with one of said swords, fork means at one end of said bar engageable with means adjacent said cam on the rock shaft for maintaining alignment of that end of the bar with the shaft but permitting reciprocation of the bar, a follower carried by said bar and fork means and engageable with the cam whereby reciprocatory movements are imparted by the cam to the bar, a swinging lever means carried by said sword and connected to the shaft and engageable by the bar for imparting movements thereof to the shaft.

14. In a stop motion for a lo-om having a rock shaft and a lay including a lay beam and swords pivoted at said rock shaft, a center fork comprising filling thread feeling tines, cam means effective to swing said tines through filling feeling and indicating movements, a shaft movable lengthwise of said lay beam to which said cam means are fixed and by which they are moved, and means for periodically reciprocating said shaft comprising a cam rotatably mounted on said rock shaft, means for rotating said cam, a bar and means for guiding said bar in substantial lengthwise alignment with one of said swords, fork means at one end of Said :bar engageable with means adjacent said cam on the rock shaft for maintaining alignment of that end of the bar with the shaft but. permitting reciprocation of the bar, a follower carried by said bar and fork means and engagea-ble with the cam whereby reciprocatory movements are imparted by the cam to the bar, and means for imparting movements from the bar to the shaft which comprises a lever arm connected to the shaft, a second lever arm movable with the first and engageable by that end of the bar adjacent thereto, spring means for returning the shaft in one direction, the connection to the lever and bar being such that movement is imparted to the lever by the bar in one direction only.

15. In a stop motion for a loom having a rock shaft and a lay including a lay beam and swords pivoted at said rock shaft, a center fork comprising filling thread feeling tines, cam means effective to swing said tines through filling feeling and indicating movements, a shaft movable lengthwise of said lay beam to which said cam means are fixed and by which they are moved, and means for periodically reciprocating said shaft comprising a cam rotatably mounted on said rock shaft, means for rotating said cam, a bar guided for movement substantially lengthwise of one of said swords adjacent said cam on the rock shaft, a follower on said bar and in contact with said cam, and means interposed between said shaft and bar and supported upon the lay sword for imparting movements of the bar to the shaft, a switch means through which a circuit controlled for stopping the loom, and a contact nger carried by said means for imparting movements of the bar to the shaft for affecting said switch means when the means for imparting movements of the bar to the shaft and the shaft are stopped in an intermediate position.

16. In a stop motion for a loom having a source of power connected for operation of the loom through clutch means, a periodicaily movable actuator and means functioning upon said clutch means to disengage it thereby to disconnect said source of power to knock olf the loom, detente movable to and from a position between the moving actuator and the clutch disengaging means for imparting movements of the actuator to the clutch disengaging means, a circuit and warp and filling thread sensing means forming a part of said circuit and effective upon sensing an abnormality in the condition of the thread, for completing said circuit, and electrically operated means connected to Said detents for selectively moving one of them in response to the warp and filling sensing means to interpose it in the pathway of said moving actuator.

WALTER J. BUDZYNA. MAURICE R. FLAMAND.

References Cited in the le 0f this patent UNITED STATES PATENTS Number Name Date 1,865,930 Lindsjo July 5, 1932 2,300,098 Brooks et al Oct. 27, 1942 2,355,609 Stuer Aug. 15, 1944 2,378,895 Brown June 26, 1945 2,437,406 Rogers Mar. 9, 1948

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