US918803A - Thread-controlled stop-motion mechanism. - Google Patents

Description

c. H. WHITGHER. f v v TWAB GONTROLLED STOP MOTION MECHANISM.

APPLICATION IILED FEB. 20; 1907.

Patented Apr. 20, 1909.

2 SHEETS-SHEET 1.

I J55 0 enter. catai laslif Z mil/M1.

. c H. .WHITGHER. THREAD CONTROLLED STOP MOTION MECHANISM.

v Q 1 APPLIOATIOB FILED FBBQQO, 1907. Patented Apr,

2 SHEBTS-SHEET 2.

, To all whom it may concern.

CHARLES H. wnironnn, OF LAKEPORT, NEW HAMPSHIRE.

THREAD-CONTROLLED s'ror-Mo'non MEcHAmsi/r.

Specification of Letters Patent.-

Patented A rn 20, 1909. I

Be it known that I {CHARLES H. WHITOHER, a citizen ofthe United States, and resident of Lakeport county'of Belknap, State of New Ham shire, have invented an Improvek ment in mead-Controlled Stop Motio' Mechanism, of which the following description, in connection with the accompanying drawings, 1s a specification, like characters on the drawin'grrepresenting like parts.

This invention resides in'a-sto motion de vice or niechanism' self-.containe in Structure and adapted for use in connection with a" thread using machine. It is particularly adapted and designedfor use in connection with a knitting machine to which thread issupplied from suitable bobbinsor spools. By the use of the term thread" I intend to cover any form of yarn, thread or similar material ad iltpted for use in knitting or other machines.

e in! ortant feature of the invention resides in t 1e independent and self-contained character of the sto motion mechanism whereby it may be use inconnection with any thread-usingmachine and may 'be changed from one machine toanother as desired. For

example, inthe case of knitting. machines,

it. is frequently desirable .tochange from one size of cam cylinder to another to allow of the knitting of different sizes of goods. The

construction ofthe present invention be-- ing entirely independent of the thread-using machine, any such change can be made,

without in any way affecting itsoperation or requiring the removal and replacement and re-adjustment of parts of the stop motion mechanism. Furthermore, by reason of.

itsself-contained and inde endentconstruction the present invention is adapted for use with anyand all kinds of machines and may be changed from one kind of machine to another; and is thus adapted for use with anism, thus enablingfthefstop' motion mechv positively operate I action 1s always positive, sure and accurate.

all kinds of old machines as well as new;

Another important feature of the invenftion'resid'es in the fact that the mechanism 3 for causing the sto. ping 'ofthe machine is so that the stopping Another important feature of the invention resides in the embodiment of a clutching mechanism in this stop-"motion mech- Application tiled February 20, 1t0'7. Seri'alNo. 358,393.

anism to lie-used in connection with highspeed machines, suchas seamless knitting machines-which require a belt'shifterr- 'To operate" a belt shifter for stopping themachine is impractical in connection With.high- 1 ;speed machines because it cannot be operated qpickly enough and when operated requires 0 e use of brakes which jar and injure. the machine. q Another feature. of the inventionresidesin a carriage for the thread-guides of a stpp motion mechanism whereby they can moved .into reach of the attendant when threading up the mechanis'mafter stopping.

I Another'featui'e of the invention resides in the construction of'the actuator sustained by the thread and its cooperative parts whereby all danger from its non-operation by becoming clo god or entangled with the thread or yarn fi wrs is avoided.-

The features above enumerated and others will appear from the accom anying specification and drawings, and wi l' =be more par- The drawings show the referred form of 'an apparatus embodying t e invention designed for setting up on the floor adjacent to the thread-using machine.

" Figure 1 of the drawing in elevation represents a machine embodying my invention;

Fig. 1 shows part of the apparatus of my invention broken off of Fig. 1 Fig.1 a top view of the plate m Fig. 2 is a detail at the left of the section line a; Fig. 3- an enlarged detail of the part of the mechanism for bunc es or knots in the thread; Fig. A is a detail looking at the parts shown in Fig. 3

from the right; Fig. 5 is an enlarged detail showing part of the means for stopping. the

machine when thethread breaks' lug. 6 is a section in the line :0, Fig. 5; Fig. 7' is an enlarged detail looking at the central partvof the machine from the right,- Fig. '1, and Fig. Sis a modification.

Referring to the drawings, A represents part of the baseor framework of a machine embodyingv the invention and adapted to be supported from the floor or support for'a thread using machine}. such as a knitting machine. v

already pointed out, the machine'of ticularly pointed out in the'appended claims.

stop ing the machine on occurrence. of

orm of thread-us1ng machine with which it- A having a-fast pulley- A having spliced thereon a cone A thisJinvention' is self-contained and indeendent and maybe located adjacent to an isdesired to operate.-. In the preferred form of. mechanism illus trated the base sustain'sbearings for a shaft driven constantl and constituting a drivingelement, said shell grooved circumferentially to be engaged by suitable pins in the forked end of a cone sliding lever A mounted on a em 2 held in a dependin arm A". The. shaft A is provided with a iven element herein shown as a loose clutch pulley A that drives a belt for: actuatin the knitting or other machine to which t e threads or yarns 11,11 are fed, said pulley being adapted-to bejconnected to Sflld' shaft-to drive a knitting or. other machine when the clutch of the :closin lever A under. the control cone is moved, as will be described; I- have not shown fullythe'construction of the clutch, ulley-as any usual form of clutch pulley aving a lever A may be used with-r out departing from my invention.

Rising from the base A is a rodBon whichis adjustably mounted by a set screw B- a collar B having-an extended 'arm' rovided with a boss B that receives a rod constiing for a rock shaft pin 3, T meets herein tuting the fulcrum. for, a starting lever B, shown'as connected at itsiinner end at B Fig. 2., with a projection" -B attached to theupper end of a link B, in turn adjust'ably eonwitha radius bar B having its rumon a stud B earried by a depending arm'B. mounted 'on a rod B forming part of the base or, frame work A, said i radius bar being provided with a pin-3. as.

shown. 1 When. the outer end of lever B is depressed, it actsthrough the connections described to depress the bar B9 so that its the cone sliding lever A? and moves the cone to the-right, Fig. 1, to start the machine,-w hich done theleverB is released and is'moved by gravity into its normal inoperative position Fig. .2. Abovethe collar B the stand. has connected therewith a bobbin'or spool-carrier 0, adapted to sustain a' plurality of thread-supp ying means shown as two bobbins 0, each su lied with threadxoryarn a; The rodgher u sustains a collar C from'which is ext'ende an arm C that'constitutes a bear- 0 having an arm 0 united by a, flexible connection C with the cone sliding lever A; The rock-shaft. C is I provided with a plurality of disks C each connected'with the rock-shaft provided. with a notchG", there being as many of these disks as there-are thread-sup.- plying means and each disk beingi'rigidly The'rock shaft (3* has loosely mounted thereon awl-carriers D'eaeh provided with Ii having 4 that contacts nor- The shaft A strikes a roller keep the ro weight ofthe arm and other. parts.

has mounted thereon by a set-screw lever. D

thread or position Fig. 1, release the lever A further rotation of which is 111 shown a stud provided for each pawl and is heredrop into operative engagement with the notch C of its corresponding disk 0 has an attached cam 7 that stud 8', see Fig. 2, of a lever 9 plvoted. at 12 and united by a connection 13 ,shown as a chain with the-carrier D for the pawls D so that said pawl carrier is moved constantly, a spring D connected with saidfpawl-carrier acting normally to ler 8 in contact with its actuatasa three-armed lever mounted on extended from the projcctlon C, thelower arm D ot said lever belng weight- A spring 44 connected at one end tothe upright B by means of a collar 46 and set- -screw .45,,an'd at thefother endto the disks C, serves as .a counterbalance against the C connector chainC? The disks (1- are returned to; normal' osition' after they have been moved by t e '0 eration of the pawls D by the movement 0 the shipper lever B which,

throughthe intermediate. parts described, .will exert a downward pullon the connector 7 chain C,

the position from which they were moved by and thus move the disks 0 back to the operation oft he awls D.

--'Above .thecollar 2 the rod or u right B 1 a hub E provided with. a plurality of radially-ex,-

tended arms E one corresponding with each main releasing device D The up thread and sustaining in each case a lever or per end of 'a given controller or is acted upon and held 'normally byv the end "of a main releasing device D undercontrol-of the thread or yarn a, to be further described, and mounted on a stud D of an arm E, the said end of said lever having a-stud 5 with which is connected a link D which when raised, by fault in the am, as will be described, releases 2 that it may turn to the right to the weight D, and let the the lever Fig. 7, due

pawl- D drop and engage the notch C of disk C movingsaid disk, shaft, arm'C and connector C to turn the cone sliding lever and slide'the cone A to the left from itspulley A and the parts to be driven thereby.

As shown in Figs; 1 and 5, each arm E has erected upon it a thread or yarn guidin provided as shown in Figs. 5 and and stop v ces'of' the thread-using machine such as e ""j pivo't' being rocked against the bar 16 and:

- eis ue through the apparatus. Betweenhese bars 16 the thread or yarn is acted'upon' by'and sustains the foot 17st the mainlactuator of the stop mot on mechanism to be herein 5 claimed, said'main actuator being re'resented as a lever 18 mounted on a stu $19,

the lever havingpreferably a finger; orproection-ZO that coacts with the short end of the releasing dev'ice D said main actuator 10 being normally held when" the thread is unbroken in a position to retain the said releasing device D in the fulll'ine position Figs.- 5, 6 and 7. .The construction of this thread-guiding device and actuator is an important feature of the device and" is illustrated more fully in detail in Fig. 6. The bars 16 carrying the thread-guiding pins are sepa--- if spacedapart an inch and a half, t ey will prevent trouble from. the source ind cated y most any-forni-of y'arnii' This construction renders necessary the .foot 17 hereinbefore referred to which, asillustrated, consists'of a flat piece pivoted at the end of the inain actuator 18' and extending nearly the entire distance between the bars 16. One end of the foot, herein shown'as the upper end, is'arr anged to bear'upon one bar 16 and is provided with a" thr ead-guiding notch 'shown in Fig. 5 which prevents the thread from being pinched between the bar and the I foot. while the other end swings clear of 4 5 .as the thread travels overtm-bars 1' 6 and under the foot, the foot is'siip orted there-' upon and prevented from" a ing byany immaterial strain and until thethreadbreaks allow. the actuator 18,110 fall;

jf Above the hub Ethe rod B sesame s bs that serves as'a guide for" aflverticallyfl 1 55.

rnevable carriage G3 havin tended arms G one fo'r eaiiv and each having a -stud 211,011, 'Whic pivoted a crank arm" G rovided-"with' pp ses thread-guiding arm 42, saids'crank "arm; hav ing a .pin 22 that engages loweig'end ofa. link (23 j ointedat 24 tofan auxiliary actuator term? shown asa' lever s pa ate 1525 as .The arm G" has a'stop 2 6 a'gain 's "the sh rt and 27 of'said auxiliary actu normally maintained by a lever 28. free to length of fibers o'fthe yarnyhut in ractice the opposite bar. It willthus be seenthat or is released when the'foot will turn on its read suplply V p 1s f'longer supported by the thread, the lever 18 Will tdrnito the right from its os'i'tioniFig; 7

disse -ans move "the cone to t on a studscrew 29; each lever havin a cemented sprin r 30, the free Gas er sa1d" l eveis 28' receiving, in holes thereon of the s "rings'ZO'b'eiiIg attached to studs 32 ofa co ar 33 secured to the tube G. The

* thelinksfD before described; the lowerends links 1) above the holes in the freeends of thelever'28have"fastened to them a collarm shown in Fig. "I said figure showing part i of the thread-sustaining mechanism broken off the top of Fig.- 1, and also showin the carriage in its depressed position fora lowing the re-threading of the thread-guide.

The upperf end of each link 1) is secured to a fork or late m secured to a collarm said fork or plate aving connected therewith the upper endbf a spring m contained in's'aid tube and connected at its lower end with a plug m having extended therefrom.

a stud 1a through a slot m in said tube;

said stud entering a hole in the carriage G..

The spring m acts nonnallytol-ift-the carriage G and retain its'up er end seated yieldingly 1. against the un erside of said collar. The carriage asshown has a screw eye ntwith which 15 attached a chain a of such length as to be easily grasped by the hand of the shortest machine. I Whenever a'thread breaks and "the mai person to attend the chine is stopped automatically, the thread has, it will be understood,-to be again introduced'under the foot 17 and laid onlthe-arm G and this is difiicult to do if the attendant of the knitting machine is short of stature.- To enable the threads to be reapplied the operatormay engage the chain,pull down the carriage G and with it the. parts G G G which parts are fully shown in Fig. 1, but omitted from Fig. '1 to simplify the drawing. The 'u'pperend of each stiff or wire link D is headed at 40, as shcwnin Fig. .1 after having been inserted through a slot 42* in the plate m I In" 0 eration the threads it delivered from thebo bins C C', pass under the'teetl? of the main actuator of the-stop motionidevice,

and said device is held inits abnormal inop- .erative position, as shown in thedrawings,

lie,

the thread'passing under said foot between the pins or guides15; The threads then- .%ass upwardly and are laid on the crank arm at oneside of the guide wire 42 extended therefrom; Now in case 'the thread breaks, the foot-17 0f the main actuator being no- ,and' acting nponthe' short ar of the main eltiising device-"D. will turn, said" device D thatth'epawl D may enga sand turn e left Fig. land stop the pulley Ah 8h secured tot is upper end of the tube G,

' 20 the same speed as the pawl is moved backwardly or to the left Fig. 7.

25 contact wit 3 spring .30, w 60 t It will be noted that when the: controller or lever B isreleased by the thread through the intermediate agencies described and the .pawl allowed to drop into engagement with 5 the disk, that the operation ofthe clutch is then caused positively. and accurately. No

springs or other inaccurate devices intervene in this mechanism. The pawl D is positively driven from the driving shaft A of the apparatus and acts in turn to operate positively the clutch A;

It will be understood while the machine is' running properly, that the stiid 4 of the pawl D will ride upwardly on theinclined part of the controller I)? and slide'back and forth on thehorizontal part. thereof without the end of the pawl meeting the notch in the disk Q. The spring 44 serves asa sort of a cheekjfto prevent the diskC followin backwardly-at as the latter tor G to cause its short arm to be raised to lift the free end of the lever 28 and connection D before described, which movement will immediately move the main releasing device, releasing-the controller D as before described, and stopping the pulley A 2 v The crank' arm With'the in 42 forms a large-sized thread-guide .of suc size that the thread in running during the operation of the machine will not jump or spring out owing I to kinksor inequalities, .and at the same time the movement of the parts under the strain or tension caused by a knot or bunch catching in the pins 15 is such' that the thread easily passes outfromthe thread-guide over 45 the curved end of the arm G.

The construction of the parts of this-mechanism is such as tobe very sensitive to the tension on the thread. The inclination of the crank-arm G and its connecton with the auxiliary actuator lever G by means of the .link 23, resents. a' construction where the pull on t e thread in. passing through. thethread guide acts upon any 'sli ht increase to rock the auxiliary. actuator ever. The

degree of tension required to rock the parts is regulated with great exactness by means of thesto 26 which can be setat any desired heig t and'bythe strength of the hich. should be suflicient to hold e auxiliary actuator lever G? against thestop in opposition to the weight of ,the crank-. arm G? and connected parts togetherwith the desired tension'on the -th consequent injury to t e fabric.

of the machine uponthe breakin or fa read at which: I the parts shall 'move. This construction.

does away with any dead pull over thethread-guide and permits the use of soft spun yarns, and in aknitting machine prevents tightening of the 100 s on the needles and be seen that the sto motion mechanism will be operated byor tlirou h the occurrence of a fault in the thread suc l thethread or the occurrence of a knot or bunch in the thread. In each instance the clutch pulley is .released'throu'gh the posi- It willthus' rats the breaking of tive connections from. the lever D to the.

clutch.

When the stop motion mechanism has been operated to unclutch the driven element A the thread-using machine which is driven by this element will, of course, be stopped at once; When the thread has been replaced j he mechanism isstarted by clutching the riven element throughthe operation of the hand lever B". It will be noted that this lever for operating the clutch is a part of the independent self-contained mechanism constituting this invention. The th'read-usin machine itself may be provided as usua with a starting and stopping lever or shipper for starting and stopping t pendently of the breaking or failure of the thread. The mechanism ofthe present in.- vention is concerned only'with the stopping of the thread and the starting of t e machine after the'repair or replacement of the thread.

In the constructionillustratedas the preferred embodiment of the invention it will be noted that all the various mechanisms above the base are sup orted from collars e machine indeadjustably mounted on t e upright or rod B. This enables the-entire device to be altered to ,suit the particular conditions, such as variations in the length of bobbins or come of thread, the height of the particular ma- .chine with w'hiclilt is to be used, the speed at which the machine with which it is to be used is run, and other conditions which may occur.

. Having described my invention, what I claim as new and desire to securebflitters Patent is 1. .A self-contained stop motion mechanism for use in connectionwitha thread-using mach1ne,'compr1s1n a base, a driving element and a driven e ement mounted on said base, the said driven element being adapted to. drive said thread-using machine, clutching means for connecting and dlsconnectmg said driving and dr1ven e renceof a faultifrt e thread to cause the Tdisconnectingof said clutching means.

I 2. A self-contained stop motion mechanism for use in'connectionwith a thread-using machine comprising a base, a driving element and a driven element mounted on said I ements, and means rendered operative b or through the occurerases base, thesaid driven element being adapted to drive said thread-using machine, amen-- sa d a and driven elements, "means renderedpperamve by .orthrough-the occur renceof'a fault in -the threafcl'f'tocause theQ dis connecting ,of said I clutching 1- means, and man-ually-operated means to causethe connecting of said clutching-means. =1 3,;Aself-contained stopmotion mechanfish} fonusedn connection with athread-using machine, comprising. a base, a driving -element and adriven element mountedon said base thesaid driven element being: adapted to drive sa d .thread using machine, clutchmg .lneans for-connectin and/disconnecting" lements', and means "base, the said driven element being adapted toedrive said thread-using machine, clutch- Jhleans for connecting and disconnecting saidw driving and driven elements, -means positively; actuated by said driving element .andrendered operative, by. or, throughthe occurrence or a. fault, in the threadtocause the disconnecting of said clutching means,

and-"manually-operated means to cause the connectingiof saidg folutching means.

T55 A s-elfscontained stop motion mechah ism for use innonnectien with a thread-using machine, comprisin I a "base, at'driving "elementv and-"aidriven e ement mounted on said 40' base; the "said driven element being adapted to; drive" said thread using. machine, clutch-i ing: means gator connecting and disconnecting saiddriving 'anddriven elements, agflurahty of thread supplies mounted on s ;1' Jbase, a

pluralitywot means onefor eachv thread I supply 'and:eachfrendered operative by or through the occurrence. ofa fault in its thread to cause the disconnectingof said clutching means. r

-"- 3 $ism'foriuse in connection witha-f-th read u'sing' machine," comp'flsmg :a base, ea? driving element and a" drlven e1ementm'punted onsaid base, thesaid drivenelement he ng'-adapted 55, to "drive said threadsusing machine, clutchfing. means foi' connecting and disconnecting said driving and driven elements, a lulrality, of thread; supplies mounted. on sai base,-a;, plurality :of'mean's one for each thread supply .and each'positively actuated by- 'said dnirmg F element and "f each rendered l-operative by or through the-occurrence of a fault in'its thread ti '"f-' :'1aiisev the i disconnecting .105 said clutching means." {'1 mg meansfor "connecting andidisconnecting 6".*A 'selfgcontaineds stop-motio i ;mechan'- anism compr sing means for stopp ng the operation of a driven element, a thread-guiding -means for connectin 7, self contained stop motion mechanism' for use in connection with a thread-using a machine con-ipri singa b'ase,a driving element and a driven element mounted on said base, ,thesaid drivenfe'lement 'being'"'ada ted to drive said threadusing machine, c utc hin ated means for causing the disconnecting of supplies mounted .on said base, and a Inrality of thread-guidingdevices mounte on said .base, one for each thread and acting by or through the breaking of the thread to' render operative said positively-actuated means. v

'8. 'A self-contained stop motion mechanr ism for use in connection with a thread-using machine comprising a base, a driving element, and a driven element mounted on said base,

the said driven element being adapted "to drive said thread-using machine, clutching v -means for connectmg and (lISCODIIQCtI Iig sa d driving and driven elements, pos1 tivelyactuated "means for causing the dis connecting of said clutching means, a plurality of thread supplies mounted on said base, a (plurality of thread-guidin devices mounte thread to render operative said positivelyactuated means, and a plurality of auXiliary thread-guiding devices mounted on said base and acting upon the occurrence of a knot or bunch'in the thread to render oper ative said positivelyiact'uated means. i

' 9. A thread-controlled stop motion-mach;

anism comprising means for stopping the operation of a driven element, a thread-guiding stand provided with two thread-guid'in supports Widely separated to'prevent the t read bers extending therebetween, an actuator arm provided with a wide thread sup orted foot pivoted 'at'the'end thereof and a apted to rest on one of said supports and to swing 1 clear of the other, and means rendered operative'vby the movement of said actuator arm" upon its release by the failure of the thread to actuate said stopping means.-

I '10; A thread=controlled stop motion mechstandjprovided with two thread-guidin ,sup-- orts widelyseparated to prevent theft read 0 anddisconnecting sai driving and .drlten e ements',pos1t1vely actuon said base, one for eac thread, and acting by or through the breaking of the "said clutching means, a plurality of thread bars extending therebetw'een, an actuator armprovide'd with a wide thread sup orted foot pivotedat theend thereof and a apted to rest on o'neof said supportsiandto swing iclear of the other,"t he edgeofthe foot resting- 1 ulpon the support} being-provided. with Y a rad-guiding notch, and means rendered Qoptative hy tlieiiiovementof said actuator on its release by, the failure of the three nas est; stopping means,

11. A thread-controlled stop motion mech- I anism comprising two thread-guiding supports widely separated to prevent the thread here extending therebetween and an actuator arm provided with a wide thread supported foot pivoted at the end thereof and adapted to rest on one of said supports and to s clear of the other whereby upon the failureof the thread theactuator arm is reease 12. A thread-controlled stop motion mechanism comprising two thread-guiding supports widely-separated to prevent the thread bers extending therebetween and an actuator arm provided 'with a wide thread supported foot pivoted at the end thereof and adapted to rest on one of said sup orts and to swing clear of the other, the e go of the foot resting u on the support being provided tuate thestopping mechanism.

14; A thread controlled stop motion mechanism comprising a base, an upright from said base, a carriage mounted to slide upon said upright, a spring for holding said carriage its normal raised position, a plurality of arms extending from said carriage, a thread guide pivotally mounted on each arm and provided with a wide 0 en mouth,

a lever pivoted on each arm an connected with each thread guide and adapted to berocked by said guide upon the occurrence of an abnormal tension on the thread, means rendered operative bythe movement of said I upright, a purality o lever to actuate the stop ingmechanism.

15. Athread-controlle stop motion mechanism comprising a base, an upri ht therefrom, a carria e verticall movab e on said arms extending Ill-Said carriage, movable thread-gu1des mounted onsaid arms'and adapted to render.

operative t e-stoppin mechanism upon the occurrence of abnorma tension on the thread,

- a spring for maintaining said carriage in its raised position, and means whereby the carriage may be lowered by. the operative within reach for threading.

' war y-curved at their ends along which the fi eedthread slides and is guided, pivoted 16. A thread-controlled stop motion'mechanism comprisin pan upright, a plurality of arms rojecting rom said upright and down-- erases thread-guides mounted on and near the outer ends of said arms and provided with large wide open months for guiding the thread, means rendered operative by the movement of said thread-guides upon the occurrence of abnormal tension on the thread to actuate said stop mechanism and deliver the thread on the downwardly curved end of its said arm.

17. A thread-controlled stop motion mechanism comprising a support, an auxiliary actuator lever-pivoted on and near the outer end of said support, 'a crank arm pivoted thereon and" provided at its free end with a thread-guide, ,a link connecting one end of said lever and said crank-arm, and means for yieldingly holding said parts in, and acting to return said parts to, normal position with the crank-arm lnclined to the direction'of the pull upon the thread passing through said thread-guide.

18. A thread-controlled stop motion mechanism comprising a support, an auxiliary actuator lever pivoted t ereon, a crank arm pivoted thereon and provided at its free end" i with a thread-guide,,a link connecting one end of said lever and said crankarm, a stop on said support, a spring connected with the 1 opposite end of said lever and acting nor mally to hold the lever against the stop with the crank arm inclined to the directlon of the pull u on the thread said threa -guide.

19. A self-contained stop motion mechanpassing throughism for-use in connection with a threadusin machine, comprising a base, a shaft mounte in said base, a driving element for said shaft mounted thereon, a driven element mounted on said shaft, .said driven element being ada ted todrive said thread-using-machine, a c utch for connecting and disconnecting said driven element and said shaft, a cam mounted on said shaft, a pivotally-mounted pawl, positive connections between said cam and pawl whereby the latter is positivelyand continuously operated, a pivoted notched disk adapted to be enga ed y said pawl and connected with said 0 utch to cause the operation-thereof, said pawl bein normallyheld out of engagement with sai disk. and means rendere operative by or through the occurrence of a fault in thethread to cause the'operati'on of said disk by said pawli'and thus actuate theclutch.

20. A self-containedstop motion mechanism for use' in" connection with a threadusing machine, comprising a base, a driving element and a driven element mounted on said base, the said driven element being iii adapted to drive said thread-using machine,

clutchingmeans for connecting and disconnecting said driving and driven elements,

meansfor causing the disconnnecting of said' clutchmg means, a thread supply mounted.

7011 said base, a (;u-1-ea, 1--g1 id ngdev'i'cemount name to this specification, in the presence of ollglaid lfmsfi' anggacging by 05 thl oughthe 1 two-subscribing witnesses; v rea go 1; e t ea to ren er 0 erative' J said means, and-means whereby the is'tande H 'WHITOHER' 5 between said thread supply and said thread- 'Wi'tnesses:

guiding device may 'be'a, iusted. Y Y 10mg; G.- RowELL', k In testimony-whereof,-' have signed my SUMNER v

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