US2332964A - Rotary loop taker for sewing machines - Google Patents

Description

0a. 26, 1943. C E. CQLEGRQVE 2,332,964

ROTARY LOOP TAKER FOR SEWING MACHINES Filed May 15, 1941 2 Sheets-Sheet l INVENTOR. BY 65 494544," (0456 9014;

WFIW

ATTORNEYfi Oct. 26,1943. c. E. COLEGROVE ROTARY LOOP TAKER FOR SEWING MACHINES Filed May 15, 1941 2 Sheets-Sheet 2 Z0 i ival I N VE N TOR. 67/424 5 E. (04:62am BY ATTORNEY5 result even in temporar Patented Oct. 26, 1943 UNTITEDSTVATE s PATENT OFFICE itdTARY Ll :lf:7:tF0lt i I MACHINES Charles ErColegrove Lakewood, Ohio, assignor to White Sewing Machine Corporation, Cleveland,

Ohio, a corporation of Delaware Application May 15, 1941, s 1 i 1 o 393,572

28 Claims. (01. 112-228) i y This invention relates; to a loop taker for a sewing machine has, ijor examplea lock stitchsewing machine.f*The invention relates more particularly to a loop taker of'the type known as arotaryfloop taker or revolving hook loop taker. As iswell known in the art, loop takersoff the ,rotarybr revolving hook type include a rotatable p ha ll 'pd wh ch a oo s z b a :for manipulating the loop in: thetupper-or needle thread. A bobbin case carrieris mounted with- "inthe cup-shapedbody but new against rotation therewith qrthereln and receives thebobbin which carries he thread. In this connection it willbe under to od that suitable means usually carried bythe bed plate of the sewing machine "cooperates with a portiojn of the bobbin casecarrier .to hold the flatter against rotation while the body rotates relative thereto. The bobbin is mounted in a bobbin case 'supported"in the bobbin oase carrier against rotation relative thereto.

loo'p s eiz ing beak of thef'rotatable body enfterstheloop irrthe upper or needle thread and carries one side or said loop in front of therim 'of the body while taking the other side of said loop to therear of the bobbin case carrier.

'1 The rotatable body i provided with'a circular raceway for a peripheral bearingrib on thenon- "rotatable bobbin case carrier; j The, body usually has alportion cut awayftofl iorm the loop seiz- "izi'g'beak and to provide also an opening for the upper or needle loop thread to permit the pas- "sagepfthatside ofthe loop'whioh is carried to therear side of the bobbin'case' carrier." The bobbin case carrier has a portion of its periphery cut away to provide a similar opening, wherefore the raceway in the bodyandthe bearing rib on "the bobbincase ca1rrier' aref not' continuous throughout their circumferences.

.In other words, the constructionprovides gaps rin the cooperating bearing surfaces of the rib andraceway and: these gaps can-cause what is known in the art as clogging. This clogging may .cause' serious difficulty inthe efiici'ent operation of a sewingmachine of this type and can Clogging will not occur' iflthe upper or needle ily stopping the opera .tionof the machine. i 1 l lor loose threads may be'pickedup by the loop seizing beak ,or hook and be drawn between the raceway in the body and the peripheral bearing rib on the bobbin case carrier. 1 Under such circumstances it frequently happens that the thread which is improperly drawn into the raceway becomes so tightlywedged therein as to prevent the free and eflicient operation of the loop taker or even to; completely stop its operation. When such an occurrence takes place it is necessary usually to take the loop taker apart so that the wedged thread canbe removedfrom therace- Way. This is a serious disadvantage as taking the loop taker apart is a fairly complicated manipulation which the usual operator is notcompetent to perform, particularly as such operatorordinarily his not equipped with the proper too-ls for thispurpose. g

An object of the inventionis to provide a construction ,for a sewing machine loop taker of the typeuspecifi ed and whichis so designed that the loop takercan be maintained in proper working conditionreadily and conveniently by any operator. a p

Another object of the invention is to provide a loop taker such as specifiedin the lastnamed object and wherein, the proper maintenance of thesarnecan be obtained without disassembling the loop taker mechanism. l

A still further object is'to provide a loop taker ,mechanism which is solconstructed that should any thread become wedged between the raceway in the rotatable body and the bearing rib on the bobbincase carrier such thread can be readily and lquiclgly removed by the operator without disassembling the loop taker mechanism. I

Another object of the invention is to provide in connection with a loop taker mechanism, a power operated arrangement enabling the loop taker to be maintained readily and easily in prop er operating condition; and free of clogging.

Further and additional objects and advantages not hereinbefore specified will subsequently become apparent during the detailed description which is to follow of several embodiments of the invention. l l i l The present invention-contemplates attaining the objects above specified and the-objects and advantages later to become apparent by providing in the loop taker means'for enlarging or expanding ina transverse direction the raceway in the rotatable bodyandthus providing substantial clearance between the raceway and the peripheral rib on the bobbin case carrier, wherefore when the loop taker is rotated any thread which latter parts-are in assembled relationship. H 2' ,The bobbin case carrier .25, ibobbinwoase 29 and the bobbin; areiheldragainst rotation with the body by-means 0f a1keeper3 i carried by: the bed plate ofthe isewing-maohineand engaging in, a

notch? 32 formedhinkanupstanding portion 33, at

the outerend of theibobbin case carrier 25, as I lisjusual in loop takers of thistype.

i n In: order toteffect theaexparisionf'and.contraction or the raceway the vfollowing:arrangement is employed. (The: disk; l' I rof theubody is pro- :vided witha pluralityof ciroumferentially spaced i -openings preferably, arranged concentrically to the axis of the disk "whilea :plurality of pins are slidable in: theseE-openings with their left hand ends, as viewedin thexdrawin'gs, contacting the bottom of the-.cu'p-shaped member 2|. The right handends; of the pins 34' are engaged by a nut 35 screwed Ion theythreaded portion 15 of the .hubrl2. A fspring pressed, balldetent 36 is carried by the nut 35am retainsthe latter *i-niadjusted position upon the "hubl2. 1

- eWhen thennut 35 is screwed to its mostleft yhand position, as viewed in 3, it pushes;the :pins 34againstthe cup-shaped member 2| and 'moves the latter-toward the left, as viewed in thedrawings, until the rib 23 on said member engages the internallx sh0ulder 22 not the ring 41. Atflthis time the taperedouter or openrend :"0f the member ZIQispositioned against the peripheral rib 26 of the bobbinucaseucarrier with ,aworking or bearing 'fitand the racewayxdeof movement of the member 2| inorder', to en: large the transverse dimension of: the raceway is sufficient to ,allow, anyyfclogging thread to esoapefromtheraceway but isnot so great as to render the mechanisminoperative; -Consequently, should theoperatori forget to screwjthe nut 35 back to its most left hand position after it has been backed off; the loop takerisstill operative although perhaps its, operation would benoisy;

It will benotedthat; the outer or open end of] the member 2| is inclined or tapered-and that the, peripheralt-ribkli on the bobbin case carrier is complemental-, and this"arrangement iszemployed since ,it; facilitates the disengage;-

mentzof clogging threads'from the racewayas when the member :21 is backed off, the peripheral rib126can be positioned out, ofcontact with any wall portionof the raceway.- H

In Figs. 7 and 8 the loop takerashown therein is identical in construction with the-loop taker previously, referred to, exception the transverse configuration of the raceway in the bodyand of the peripheral rib on thebobbincase carrier. Consequently, the, same reference numerals l are employed onthese two figures as in the previous fined by the flange-20 and the inclined open end 0! the member 2| has its normal .workingtransverse dimension; When this condition exists the rib 26 and: the 'racewayfcanj rotate'lrelative. to

-each gotherqwith a, working fit such thatucthe 9 bobbin case scarrier does not'hai/e lateral move- -ment relative to the body when the said body isjvrotating. H In the event of clogging i. e., threads 'workingf into theraoeway; theloperator merely backs Off; :the nut 35 z to: 1 relieve; the 1 pressure on the 'pins 34 and the cup-shaped member 2|,xwith the result thatz'said member is free to move toward the right asviewediin the drawings to enwlarge or expand theltransverse' dimension: of the escape from the; enlarged or expanded :raceway.

;Whenthe;raceway has beenrfreed of such threads the nut 35 i can again bescrewed to itsimost restored to "left hand position andr the parts normal operating condition. 1. It will have been-seen that in order to free .the racewayyofi the cloggin jt threads the operator merely performs the, simple operation of ;backing off thenut 35 and thatfsuchioperation doesnot require any toolsor' any particular :aptitude on1the:partiof .theioperaton;1.L

It should also be observed that the amp i 1 figures to indicate theoorresponding parts The outerytor mopen gend 24a) of the wmember 1 2 I, as shown in Figs; 7 and 8, insteadof being inclined is straight, while the peripheral; rih 26a of the bobbin case carrier is rectangular in cross sec tion. @It willbenoted, that Fig. '7 showsthe adjusting nut screwed to its most left hand position and the-member 2|.yheld in its most :left hand; position to rprovide the normal working transverse dimensionion, the raceway. In Fig. fi thenut 35 has been backed oflvto expander enlarge the transverse dime'nsion ofhthe racerway when it is desired-to free the same o'i fclog s n thr I n w In place yotutilizing manually operated means for expanding or contracting the raceway in the body, power operated means maybe. employed for this purpose. An example of one form of such fpower, operated'rneansf is shown inFig s 9 10' by" way ,of illustration and will now be described, litbeing understood, howeyerg th at the arrangement for expanding or contracting the raceway'i power rnay take Various other forms. V

(The body, bobbin case carrier and bobbinfcase shown in Fig. 9 areingeneral identical with the corresponding parts of thelooptakefshownin Figs. 1 to ,6 inclusive and accordingly the 7 same iisible to designate these parts. w

,A portion of "the sewing machine "bed plate is reference characters are utilizedfla's far as" posindicatedinsection at 31in Figs. 9 and IO and a support 38 projects downwardly from the underside of the bed plateand forms a front bearing for the horizontal drive shaft later to 'liereferred to that is connected to'the loop :taker. Thedisk' I I "of the body'of the loop taker lepro- "vided with aihub portion lZathat is "secureci to the left handend of the' horizontal drive shaft 39. f This drive shaft 39,.is rotatably supported *ina suitable bearinglformed in the supportz38 and in other suitable bearings not shown The shaft 39, is connectedrwith and driven bykuthe operating mechanismof the sewing machine, which mechanism, initurm'may be drivenlby an "electric motorwlfl," indicated? diagrammatically in Fig. 10: 'I'heoperating mechanism, the connection between it and the shaft39 endthe mo- -tor 48 andthe other elements of the sewing maone n which may time have not been snovm as tbey a e wen shaft 3! is provided with a bore d6 extendingziriwar dly oi' the haft from t he ie'ithand end thereof, is" deariytsnown Fig. 9',-'wl ii le a rod t l is siidabl-y mounted said bore end cdntaetstat it's ieithand end the cup-shaped iii'tl i' shaft 39. "The p'in 43 also passes through I winseen that when thea'ririatdre k2 moves r'idwis rjeiativet'o' the'sha-ft 39 the push rod 41 and the bore N; v.

eiectromagnet is-seeureato the underside "or the bed plate 31 by means or a braieke't- 4-5 which is attached tot-he pole' pie'oe ts ofth'e ledtiom'agriet. Thepoiepiece 46 is shown in will correspondifigly iiidve relative to "said shaft th s instance as being siibstanti i1v u-shaped 1 with its le s" extender. hor izontany above and below" the snart 39- y v d beyond the same as clearly shown in Fig.19. The pole piece 46 or "the -eieet roinaghet earries'the iisoa'i fieid winde edhn'dte'd Witiianylsuitable source of electrical nergy; ieiera iy the field'fliiidiiig 4's or the'eieetromagnet is coniic'ted by the leads 50" and" '51' to oor duits 52 and t3 forming the electri endiiitfpr the driv in 7 iiidtor'fl of the sewing "machine previously ifeiiedto, in such maneery that the electro- "riiag'i'i'et is energized and deeiiergi'ze'd simultaneei s'iywitht iosing and opening of the main control switch 54 for said diiviiig' motor. That is to say, the ele ctroma gnet,,woi1ld be ener- ;g'izdfwheii the sewing" iiiachirie is operating, and deenergized instantly that t e o erationb the machine ceases.

It iiiillb'e seen that the 'eleetroinagnet is energized the armature is attracted by the legs 41 ofjthe pole piece) and henc'e, i's, dis- "placed leflt'altit e lid the Sl'itft 39, toward (the left with a resultant displacement toward the left of the ush; rod 4 1,. This isplacement of the armature \42 and pi sh rod H toward. the left moves themember 2|. towardthe left until, the 23fthereof contacts the internal shoulder 22 {oi-the ring liq-At this-'time thetouteror Open end 24 of the member '21 has .arunning fitv with the peripheral rib 26 9i the 'bo bbin case carrier I :25;- That is to say,- the raceway :in the body" of the loop taker forrthe rib 26 has its normal working transverse dimension; 1 1 1 'It would be well topoint out at this time that the parts are so sized that'the limits of the displacement movement toward the left as determined by "the engagement-of the rib 23 withthe shoulder 22 never brings the armature42 into :contact with'the legsflbf the pole piece 46, and 'fc'onsequentlyno rubbing action between the armature and the legs ofr'the'po'le piece everv takes place. i

When the elec troinagnet "is. :deenergized the thrust on the push rod 41 terminates, and hence theihember, 2l'is free to be displaced toward the right, asviewed in the. drawings, to enlarge or expand the transverse dimension of the raceway in "the body for the.- pei' ipheralrib 26 :and allow --the escape of aiiythreadsvwhich imayhave got armature-42 aiidpassin'g -tlifioug h'diametrically ten into-said raeewayar e" dsedeiogeing of tiie In Fig, 4 these is diagrammatica yillustrated the manner in which the loop seizing beak 18; of the iooptaker" picks up the ioo'p'L oi the u per of needle thread, If L is correctly ior'med ithe loop taker will. carry the loop properly around the bobbin ease. I T011 the other hand, if a slack lode-is fanned-through impro ermanipiilation, or if looseithreads accuimilatein the vicinity of the loop taker, isuch sla ck loop or ioose threads'are liable tobe piekednp by'the ioop seizing beak 18-: be drawn between the raeewayand the bearing rib 218 on the bobbin ease carrier resulting in clogging.

A rotary looptalker' embodying the present-invention enablesrthe slack looniloose 'threads' or width or said raceway. "4'0 othermobstructionflcausing the clogging to be readiiy cleared from'the raceway a I T The "clearing of the-raceway "does'not r quire -.thetdisass"embhng orf the loop taker; any particw lar .skili' or *k riowledgewonthe'bart 'ofthe operator, or the use ofxtoois forrsuchrpurpose.

It 'shou ld' beunders'tood that the presentinvehtionismotto be limited to the-specific embo'diinentl thereof illustrated herein merely as examples, but that the-invention is susceptible of an variationsan'd adaptations withinthe'scope (if the appended claims.

Having thus described my invention; 1' claim:

1. A rotary loop' taker fora sewing machine tomprising a relatively rotatable e up shaped :body' andbobbin ease carrier therein, said body and; carrier being provided with a; cooperating raceway and bearing-rib, 82nd n'ieans operativeiy associated with said body remotely from the open end thereof and extending into :the hollow interiorr of vthe bo'dy'foi' positively adjusting the 2. :A rotary loop taker for sewing machine comprising a. relatively. rotatable cup-shaped body and bobbin case carrier therein, said body and carrier having aicooperating raceway and rbearirig rib, and positive means operanvely 'as .isd'ciated withisaid hody'ior maintaining the normal working" width of said raceway orvfor ena' blin'gthe Width thereof to be enlarged and ineluding a part located within the hollow'interior 3. TA rotary loop takeriorwa sewing machine :comprising a; "relatively vrotatable cup-shaped body and bobbin ease carrier therein,"said body and carrier havinga cooperating raceway and bearing rib, "and. means :for positively maintain- "irig ithesnor'mal working width .of said raceway :or for enabling the widththereo'f tobe enlarged ."and including a movable-part extending intothe li'ollow interior oi said body and a movable ele- -nient operatively associated'with'said body and part, and having a-portion defining a side Wall of said raceway. I i K 4. A rotary floop :takerfor a sewing machine i omprising af relatively rotatable cup-shaped 'bodyand bobbin caseicarrirtherein, said body.

and carrier having, a cooperating 'raoevvay and bearing rib; and"means"iorfmaintaining the normal working widthi-of said raceway'ior "for enabling thewidth t'hereof to be enlarged and "indluding a movable elementpperativdy asso- -ciated" with said body andhaving a p'ortio'n derfiningaxside Wall of said raoeway,"andmeans for positively movingsai'd element and operable from the-exterior of said bodyiand .includingia movable gagt extendin'giintoythe hollow interior of said :oy. j a I a A rotary loop taker for a sewing machine comprising a relatively rotatable cup-shaped body and bobbin case carrier' therein; said and it carrier having a cooperating raceway and bearing rib, amovableelementoperatively assofining the innerside wall of said raceway, "a'

movable member supportedby said body and engaging said elenientto move theilatter to vary the width of said ra-cway',"and means for movme said membe'r i u a P7. A rotary loop taker-"for a 1 sewing machine comprising arelatively rotatable body and bobbin case carriergsaid bodyand carrier having a cooperatingrac'eway'and'bearing rib, a slidable element operatively associated with saidbody and having ajp'ortion defining a side wall of'said raceway; a movable member supported by said bodya'nd engaging said element, and means operatively associated with said body for positively movingsaid member to move said element and 'vary the width of said raceway.

8. A rotarylooptaker iora sewing machine comprisinga relatively-rotatable body and bob bin case carrier; said'body and carrier having a c'oopratingraceway and bearing-rib, a mova'bl'element operatively associated with s'aid body and having aportion defining a side wall of said raceway, a "slidable member supported-by said body and engaging said element, and manually operated means operatively associated with said body for positively moving-said member to move said element to vary'the-width of said raceway.

9. A rotary loop taker fora sewing machine comprising 'a relatively rotatablebody and bobbin case carrier, said body-and carrier having a cooperating" raceway an'd bearing rib, a movable element bperatively associated with said body and having a portion defining a side wallof said raceway, a movable member supported by s'aid bodyand engageable-with said element, and adiustable means acting on; 'said'member tomove the latter positively and,- in' turn', move said elementto vary thewidthof said raceway.

10. A rotary loopitaker for a; sewingmachine comprising a relatively rotatable body and bobbin case carrier, said body and' carrier havinga cooperating: raceway rand bearing rib," a movable element operatively associatedwithsaid bodyand having a portion-defininga side wall of said raceway, a movable member supported-by said body and engageable with saidelementgand means for moving saidmember'to move said element-to vary the width of said raceway and including a threaded portionon said body and, a nut cooperating therewith andengageable with said member, I 1 am", A1. 11; A rotaryi loop takerior a sewing machine comprising a relativelyrotatable body and bob binwcase carrier, said body and carrier having a cooperating raceway and bearing" rib, a movable element operatively associated with said body andhaving a portion defining a side wallof-said raceway, a movable member-:oyierativelylassdcarrier mounted in said body and provided "with ciated with said body: anduengageable' with said element, and power" operated means for" moving said member to move said element to vary the width of said raceway. a l q l v 12. A rotaryloop taker fora'sewingimachine comprising a relatively rotatable-body and bobbin case carrier,- said body" and carrier having a cooperating-raceway and bearing rib, a movable element operatively" associated with said body and having a -portion' defining' a side-wall ofsaid raceway} a movable member operatively associated with l said body and enga'geable with said element, and electrically actuatedmeans for moving said memberto niove said element and vary the width of said raceway. i 13. A rotarydoop taker for a" sewing =machinc comprising a rotatable body and a bobbin case a circiimferentially extending "bearing "ri movable element mour'ite'df in 'said body, aid body and said element having *cooperating portions forming the side walls of a rac'eway for said rib a movabl' membi fsdpported in' said may and engaging said element, and means operatively associated withsai'd body for positively moving said member to move saidcelement andvary the widthoffs'aid r eway; L I i i, A rotary loop taker tor a' sevimg machine comprising a rotatable body, 'a bobbin case carrier mounted therein 1 and provided with a circumferentially extending bearing rib'jfa' movable element housed in said body, said body and said element having cooperating portions forming the' side wallsof a raceway forfsaid a slidable L pin supported'by said body and engagingwith said, element, and means for moving said pin to move said element and vai y the width ofsaid raceway.

15.'A rotary a comprising a rotatable body, a-bobbin case carrier mounted therein iand provided with acircumferentially extending bearing rib, a mov able element housed in said body, said bodyand said element having" cooperating; portions form: ing the side Wallgbf a raceway for said rib, a slidable pin supported said body-and engaging with; said element, and power op'erated' means for moving said pin tomove said elementand Am e-Wee k n fl i gma hi comprising a rotatable substantially cup-shaped body having an axiallydisposed external'hub a portion, a substantially cup-shaped movableelement nested in {said body-,jsaid body and said element having cooperating portions forming a raceway, a bobbinfcasefcarriermounted insaid body.and provided with a circumferentially' extending rib engagingin said raceway a plurality of 'jcircumferentially spacedslidable pins project in through the base of 'saidcup shaDed body and engaging the base of; said cup' shaped element, and means carried by said hub portion of said body and" engaging said pin's and adjustable axially ofsaid body tomove said pinsfandsaid element to vary the-widthof said raceway. l

17. A rotary loop talg'en for a sewingmacl' ine comprising a rotatable substantially cup-shaped body having an axially disposed} eXternalhub portion, a substantially cup-shaped movable element nested in said body, said body and said element havingcooperating portions forming a raceway, a bobbin case carrier mounted in said body and provided with a circumferentiallyex tending 'rib engaging in said 'ra'ce'way a plurality of circumferentially spaced slidable' pins projeca loop taker for a sewing lmachi i aid b dyjhayih amma wea xte d said shaft'and engaging s moi/able elem nt};

d an ide menw ro a 1 0 a eraro a wine ma -blaze '9 -pr sin a r ati e amiata e oclr d b b bin as v arrie d=5.bod and c r e vin a pop ra ine ra w d..h r ns r amo e e e t ope at ve 1 ,a soe t v it aid-1 body and having a por ti on definingaside wall or said race a a mova e f emb e a li' as o at d th d'body nd e g i s d el nt a d eans o na id m mb r w m ve a d element to vary the width of said racewayand i e ding e c mma e iq vi n, n o

- '19- A rotar 100p taker or w v n aeh 'ne q m ris a t air ta able ubs.antral-1 up-s ar d bpd ,hav n a axially L-di p d fe ma kl-l n r iqni a ubs ant al uphar o m rab ke er raceway, a bobbin ease carrier housed in said body endr oyided; w th arerirh r l b in rib e gaging in said raoeway, an operating shaft for and secure t saidfinub and. nwmmu i e e 3Q j N g said body, a rod s'lidablevin said hollow port on a": said shaft and engaging vK m le men z am mea s r rt s d ro n m vegsa d e ment an varrthe i t of .said raceway 2O. rotary 1001b taker Tfo'r a sewingrn'ach'ine comprising a rotatahle slibstantia'lly cup-shaped body hai ingan axially disposed external hu'b'po'rtion, a. substantially cup-shaped movable element nested in said Bo y, said body I ,d.saide1frnent having coo erati g pom a s Yd a raceway, abobb'in eas -barr er housed in. said'body'and provided vsii't'h 'a e'r'ipgierarbearmg rib engaging an operating shaft forQs'a'id 'Y- r --V 4d said bod a (fo d slidable-i'nlisaidhollow p rtion o .21. rotary rit com is g 13; a portion, a silhstan a1 ne'sted f I interior or said body, "f e sud-awe in said hdllowportionoif said 'shattand 'ngagin'g saidfmovg able element, and "hieansffor m vmg sa'idirod to i i YYeT d l i ie ifa' i ar fi W h o said nd i nclnding anfelectrornagnetic -device eratiye' qdnneotion between said-deviee 2- A 'rrlqb flak ore sew ine jom f ine a- 'ro a 'ames bs an 1y -sh e bod il a ae;"an;exte v-nalv axia r di posed hub go t fon an ope atin ishaiteforfsaid body andihavn a, hol ow p rtionextendingsinj and-secured to s idxhub porti n and mmun a q l w th t '-jnterior of saidbo'dy. a mom-bi e substantiallyoups a ed-element ested said bo y; sa body and aid elementay n cooperatin orti s efiningya raceway a hobbin'case, q r ien oun ed insaid body andnmrided w bhima e ipheral rib en aging, insaidraoeway, a slidable rod mounted n aid hollow portion oiaid shait and en a in sa d m th 0W; po i n-o said shaft: bei provided i. l .7 posed axially elongated sl ts 'angflectr fi e t embracin said h llowortioorot ga s a n armature 'sl dable on saidho qw p ion, :s d shaft, and. means carried by.; aid;ar at r en extendin th o h ,if g and said ro wh r b mov m t of' a d armaturemove 2 3 11 rod-{and shi bs ai ment o; 1 w dth -of ,s a racewayl; i v; 1 1:: I 1 w A ta rlq p ak r. er a sewin ma hine compr sin azro a a le sub taatial puphaped ody h in a x e 1 ax y. ispas hub portion, an operating shaft forrisaid body. and

liar-idea h l ow p t n e e d n wan e ur to. said hub portion and in. :eomm ic omwith the interior-o aid b dyga m vab e sub t a ly aped element nested-in saidbqdy, saidhody an said, ement ria eoo e a in r r qm F187 fin ea ewayhabobbica eea i m nted ins-a d. bod a d ma -idea, hnaf erirhe lrib en a i :i-nsaidr e ayl id bler mo rne in.saidho lpwpo t o i a dj laa fia n i s id ab e lement/th l o -r ma d sa shaft being provided diametriqally-opposed axia lye oneate 5 1 5 n1e1e o snetbra ing said hol low ortion of 'saidshait, an anna: are 's i a leuon {Said h lioweo i nof. l- S aft, and m n r i dJo v 'a mabu andnd in xt o eh a slots: d sa dod; :wh neby movementof :said ar ture moves said rod and shi t s i el men to rer h .w-i 1 ai acew y; a bo a a d sa d element havi o0: o at mgr-ma smit n orem mz sai em t elat e, o eam f ed w i sa a ma: ti -re is so oe be mha f :ne e Qn ae she a e, p wfis o said net- .7 o .o

A r 1 0 -1? a r: or a s in -ma ne c m riemea ela i elyro atab eh dy dib in oas o e rsa d rb y andwc ri rjha ae qner in v ace yndrbean eih 1 rnevab1e-,e1e-

merit operatively assogaiated with said -body and hayingazpor-tion definmgaside-wall ofsaid race- Way, ammovable member n iv y: assb ia with said body and; engaging said element, and means for moving @said member to meve element to; wiry-the width of said raceway and including an electromagnetic :device having pole pieces and an, armature operatively :connected w th id member; saidwarmaturexbemg so dis posed relative to :said;spdle.. pieces that itu neyer centaotsjthedatter. o k v combination sina sewihgimaohine, operating;meensiior thesewingrmachinemechanism including a rotary-loop taker; vsaidavioopnmaker comprising-a;-relativelyrrotatablebodyiandrbohbin casec'arrier, said body-and carrierzhaving a 00-. operatin -renewed and bearing 11b,. and means for maintaining sthe normal: working "width 10f said raceway or for enabling the width thereof to be enlarged; and *operative.aconnectionsihstweensaid iast last, means functions, tovmaintain: the normal or W dth 'oflsaidvrsmeway "only when .tthe

means "and saict operatingameansn n lu qflfipetafiing elements such thatasai'd' 26. In combination in a sewing machine, a main driving electric motor, an electrical circuit for energizing and deenergizing said motor and including a switch, a rotary loop taker comprising a relatively rotatable body and bobbin case carrier, said body and carrier having a cooperating raceway and bearing rib, and means for varya ing the width of said raceway including a movable element operatively associated with said body and having a portion defining a side wall of said raceway; means for moving said element and including an electrically operated device, and means electrically connecting said device and said circuit intermediate said motor and said switch whereby saiddevice is energized or deenergized simultaneously with the energization or deener gization of said motor.

27. A rotary loop taker for a sewing machine comprising a body and a bobbin case carrier relatively rotatable within said body, said body and I adjacentthe closed end of said body for positively moving said element and adjusting the carrier being provided with a cooperating bearing rib and raceway therefor having its inner side wall movable, and means operatively associated with the loop taker for positively moving said inner side wall to positively maintain the normal working width of said raceway or to enable thevwidththereof to be enlarged.

28. A rotary loop taker for a sewing machine comprising a relatively rotatable cup-shaped body and bobbin case carrier mounted therein, said body and carrier being, provided with a cooperating racewayand bearing rib, said raceway being formed in part by a movable element, and means operatively associated with said body and element and including a single operating member width of said raceway.

CHARLES E. COLEGROVE.

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