US1625231A - Sewing machine - Google Patents

Description

L. E. TOPHAM EwING MACHINE z gpril 19, 1927.

Original Filed April 29. 1918 f @mw w l. @www -l- 5 Zzveztr Apil 19, 1927. 1,625,231

1 E. TOPI-IAM SEWING MACHINE' original Filed April 29. 1918 'l sheets-shef.' a

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lmit 19, 1927.

Aprll 19,1927. L. E TOPHAM SEWING MACHINE originalmed April 29. 1918y 7 svheetsfsheet s l l y muera/W2" April 19, 1927.

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lgness .Zia/Hmz Patented Apr. 19, 1927.

UNITE s'rss rarsur ortica.

LAURENCE E. TGPI-IAM, 0F SXVAMPSCOTT, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MACHNERY CORPORATlON, OF PATERSON, NEW' JERSEY, A CORPORATION 0F NEW JERSEY.

SEWING MACHINE.

Application filed-April 29, 1918,-Seria1 No. 231,335, and in Canada` April 8, 1918. Renewed July 14, 1922. Serial No. 574,979.

'lhis invention relates to sewing` machines.

Certain features of the invention are particularly advantageous when embodied in loclistiteh machines employed in sewing a series of seams all of substantially the same length, such as machines for sewingl outsoles to the welts of weltcd shoes. ln machines of this cla-ss heretofore devised the operator cannot determine when the sup/ply of thread on the bobbin is running'low without removing the bobbin from the bobbin holder, and it is a common practise to run such machines until the bobbin thread'is actually exhausted. ln sewing outsoles to the welts of welted shoes the operator often starts a scam without having` enough thread on the bobbin to complete the seam, with the result that the bobbin thread becomes exhaust-- ed before the seam .is finished. When this occurs the operator cjects the exhausted bobbin by an actuation of the hand hobbin ejector lever, inserts a full bobbin in the bobbin holder, and then adjusts the work in the machine so that the needle in forming the first stitch will pass through the needle hole at the end of the last perfect stitch of the part of the scam formed before the exhaustion of the thread. The last part of the seam is started with the work adjusted in this manner so that there will be no break in the scam showing upon the upper surface of the projectingedge of the sole of the finished shoe. After the seam is completed the free ends of the needle and bobbin threads projecting from the work at the point where the two parts of the senin are joined, are trimmed close to the work. This adjustment of the work in splicin;y the two parts of the seam and the trimmingl of the threads must be accurately and carefully performed in order that the imperfection in the seam may be hidden when the shoe is finished. rThese operations, therefore, take considerable time and require some skill. Then the work vis adjusted, or the threads are trimmed carelessly or unsltilfully, the iinperfection in the seam can often be easily detected in thetinished shoe and greatly iinpairs the appearance of the shoe.

In its illustrated form the invention is embodied in a machine having a hoolr needle, a loop taker, and other thread handling,` de vices constructed and arranged to handle waxed thread and operating' to form a lockstitch seam. The invention is not to be regarded as limited, however, to hook needle or mixed-thread sewing machines, but it may be embodied with advantage in machines for handling dry thread. ln its broader aspects also the invention is not limited to lockstitch machines, but it is also applicable to machines havingl stitch-forming devices constructed and arranged to form other types of two-thread seams, and also to machines having' stitch-forming` devices constructed and arranged to forni chain-stitch and other single thread seams. lt is to be understood, therefore, that except as defined in the claims the invention is not limited to any particular type of machine.

One object of the invention is to produce a sewing machine in which the disadvantage caused by the exhaustion of the thread without forewarnini` during the formation of a seam will he avoided.

Another object of the invention is to improve the construction and operation of lockstitch .sewing machines with a view of producing a machine in which upon the exhaustion or substantial exhaustion of the thread upon the bobbin, a full bobbin may be substituted for an empty bobbin without unnecessary labor or loss of time.

Wyith these objects in view a feature of the invention contemplates the provision of mechanism for indicatingl to the operator when the amount of thread left on the thread supply holder is less than a predetermined amount. ln the preferred form of' the invention the indicating; mechanism is rendered active to indicate the condition of the thread supply only upon stopping the machine. Broadly considered, however, this feature may be embodied in indicatingY mechanisms constructed and arranged to perform this indicating function either during` the normal running of the machine or at other suitable or convenient times. lith suoli mechanism under usual conditions the operator is warned ofthe approach of the end of the thread supply before the thread is actually exhausted. This mechanism also practically ensures that the operator will not start a seam requiring` at least the predetermined amount of thread when the supply holder contains less than this amount, and the loss of time of the operator and the production of imperfect worlt resulting from the exhaustion of the thread before the completion clutch member 2() lined to the shaft 18, and av driving clutch member 9:2 loosely mounted on the shaft and movable longitudinally of the shaft into and out of engagement with the driven clutch member. rllhe driving clutch member is formed with a peripheral groove to receive a belt Q-/l for connecting said member with a pulley mounted on a power shaft located at the base of the machine and not shown in the d awings The engagement of the driving member of the clutch with the driven member thereof is controlled b v a bell cranl; lever 2G, pivotcd on a stud 28, the upper forked end of the vertically extending arm of which embraces the hub of the driving' clutch member and carries a pair of pivoted blocks 30 engaging in a groove 32 inthe hub of the driving clutch member. Upon the stud 28 is also pivoted an arm Si having a `x/iielding connection with the horizontally extending arm of the bell cranlq liti. 'lll'n'ough 'the end of the horizcontally-extending arm of the bell crank and through a lateral projection or lug on the arm 3l, passes a rod 36, and a coiled spring 38 surrounding the rod is interposed between the lug on the arm E-i and nut el() threaded on the lower end of the rod. rllhe end of the arm l-t is formed with a lateral projection indicated at lil in Fig 3 which islocated between two collars /lsl and i6 ,f-:ecured to a treadle rod fit1. 'lhe upper end of the treadle rod is pivotally connected with an arm pivoted on a shaft Bil, and the lower end of the rod is connected with a suitable treadle, not shown. lhe trcadle and treadle rod are eleiuited upon the release of the treadle by the ction o I` a coiled spring, as in the construction shown n latent No. 1,233,539.

lli/lith this constructimi` the trcadle rod depressed the coll ar 4l engages the lateral projection on the end of the arn'i Si and swings the arm down vardly, through Vthe spring 3R actuating the bell crank QG, to carry the driving clutch inemlier 22 into engagement with the driven clutch member 9.0. The spring allows the arm 34- and the treadle rod to continue their dowmvard movement after the clutch members are engaged, the clutch members then being held in engagement by the force of the spring. rilhe arm 34e is swung upwardly to actua/ite the bell crank lever to carry the driving clutch member out of engagement with the driven clutch member as the treadle rod is elevated by the action of the treadle actuating spring, by the engagement of the collar Li6 with the projection on the arm 3l. The upward movementof the arm llis limited by the engagement of an abutment screw 54e mounted in the arm, with the frame.

The upward movement of the treadle rod fl-8 when it is released not only causes the disthereby engagement of the high speed clutch, but also throws into operation the mechanism for slowing down the rotation of the main shaft, and for driving it in a forward direction to stopping position. This mechanism (see -ttigs. l, 2 and 3), comprises a slow speed driving clutch member loosely mounted on the shaft, a driven clutch member 58 carried by a sleeve UO mounted on the shaft to rotate with the shaft and movable longitudinally ot' the shaft to carry the driven clutch member into and out of engagement with the driving clutch membein The driving clutch member is provided with a series of spiral gear teeth (S2 meshing with the teeth of' ay spiral gear est mounted on a continuously rotating shaft (lo. 'l`he shaft ($6 is continuously driven by means of a belt 58 passing about a pulley Tt) lined on the shaft, and about a continuously rotating driving pulley (not shown) located in the base of the machine. The mechanism for controlling the engagement of the slow speed clutch comprises a lever T2 pivoted on the. stud iet and carrying u cam roll TG at the extremity of its forwardly extending arm engaging in a cam groove 'it in the sleeve (it). tlaid mechanism also comprises a lock bolt carrier mounted to slide longitudinally in suitable guides in the traine, and carrying at its rear end a lock bolt 82 mounted to slide vertically in the locl bolt carrier, and having` its upper end shaped to engage in a recess in the laterally-extending arm ot' the lever 72. The loclz bolt carrier is act ed upon by a coiled spring 86 surrounding the carrier and interposed between a. shoulder on the carrier and the rear end of a sleeve SS thr aded into the Ytrame through which sleeve the carrier slides. ihe rearward movement of the carrier under the action of the spring 86 is limited by the engagement of a stop nut 9() mounted on the carrier, with the forward end of the sleeve. 'lhe lock bolt e is acted upon by a coiled spring 92 which normally tends to force the loclf ooit upwardly in the carrier SO to engage its upper end in the recess in the later ally-extending arm of the lever T2. lflie position of the locl; bolt in the carrielll) is controlled through suitable connections from the treadle rod, yEhe connections for controlling the position of the loclr bolt 82 from the treadle rod comprise the lever Sli pivoted on a stud 96, and a link 95% connecting one arm of the lever-with a block l0() secured to the lower end of the lock bolt. Another arm of the lever carries a'roll 102 arranged to be engaged by the rear end of the arm 50. As long as the treadle is depressed far enough to maintain the members of the high speed driving clutch in engagement, the lever 94 is held in position to maintain the lock bolt S2 down ont of engagement with the recess in the laterallyM (all extending,- .firm ot the leverI T2 by the engagement olf the roll 102 with the curved :luee 101i termed :it the rear end ot the arm 505 whieh lnee preferably strueli on un ure having .its eenter in the exis et the urm. Upon the releuee ot the treudle und the elevution of the trendle, treudle rod und erm in() by the trezidle actuating siiring, the erin i5 dieengnged Yfrom the roll 102, allowing lhe loi-,lv bolt lo be moved upwardly by its ueliuu'ing spring'. '1`he upward movement ot the leek bolli eurries the upward end olI the loeh' holt into engagement with the lower 'hire olt the lulerullvexteiuling urni olfV the lever T2, und when the reef in the urni reuehes :i eertuin poition the upper end olf the loeh bolt is engulfed in the reeesi, thereb lurking: the levei` 'l to the loeh bolli enrrier. lVith the lever T2 loelied to the leek bell rurrier, through the eooper;ilive uetion ol' the ouin groove Trl und the exim roll To, the sleeve, (il) is moved longitudinully ot the mein ehulfl le in one direrlion lo energie the driven member oral ot the slow Speed elnirh \\'ilh the f lriving member ."ill oli' the elul'rh, :it one predeterinineil point in lhe rotulien olE the mein slnilfl, if; held in position to muinluin the memberlv oil' the elim-h in en entierement lln'onejh u oredelermined inlet-vul in the iolulion olf the shell.. und in then moved lolugiiudiindly ol' the .uhul't .in the ogn jnouile. direetion lo disengnjefe the, driven eluleh member 'll-om the drivingl eluleh meineber ul. :mother predeterminell point in the rotulion oli the e'lnil't. l'l'hen the. numbern oll the elulrh :ire enguged. the drivingsg` elnleh member lire'l :lele :is :i l'rirlion brulae lo nlon' down the speed ol' llle driven elnieh meniber und the muin rslnrll` until the driven eluleh member is retailing :it uubnlmitizilly the ferme ener-d :is the driving' elulirh Vmemw ber. 'l`he driving' elulrh member lhen :iets lo drive the driven eluleh member und the Hlm l1y ul Flow 4speed lo stopping position. l'iiou the distinguer-ment oI the .memberey el the :dow speed elueh the rolulvion ot the muin .erhui'l is urresled :it :i 1n'luletermined point in ils rolulion b v positively :ietingr stopping deviees. lilith the lever T2 loelied lo the loel-zV bolli eurrier when lhe liret ineline in the Cum `groove TS engages the eem roll Tl?, the sleeve lll is lirel'. uhi'l'led lougriludinully ol: the nulin ilni'lt lo eurifv the driven elulrh member into entrainement with the driving' eluleh member, :ind the lever T2 is then :iel'unted to move the. loeli bolli eur rier el() l'forwuldlv in its guides :ieuinet the tension oli' the springitll, the members or' the slow speed eluteh then beine` held in eli-- `e're'ement h v the pressure olf the spring'. When the Seeond incline in the eum lgroove engages the eznn roll TG. the loel( bolt eur rier is l'irst moved reurwmdly in its guides by the aetion ot the eoiled Shrine; 8G until its movement is arrested buv the engagement ol.l

the stop nut with the end el" the sleeve Se, end the sleeve Gl) is 'then moved longitudinally of the main shalt to carry the driven member ol.z the clutch out oit engagement with the dri ving1 member.

rl`he devices tor positively Stopping the rotation ol' the nniin shzrl't 1b ut u predetermined point in its rotary movement upon the disengagement ot the members of the slow speed clutch comprise u lever 10G piv oted by means ot trunnion pins 10S to e Sleeve 11() mounted to turn upon u shaft 112, und u stop lnojeetion or lug 1141 carried by the mein shaft und arranged to engage the end el the urni 11G otE the lever 10G, lio zii-rest the rotation et the shult. The mein Shaft :deo euri-ieu :1 emu 11.18 zirrmitge l to engage the end el. the urm 11G which nets to swing the lever 10C about the shatt 112. The end el the erm 11G muy be swung into und out el the perth oit the ezun 11S und projeetion 114.- by swinging the lever 106 about the axis 0l.E the lrunnion pinel lllll. The lever 106 is held in position with the end ol the erm located out ol the oulzh ol lhe eem :md projection zus longr ue the trendle rod. is depressed by the engagement ol :in abutment screw 1Q() lhrezuh-l into n. fluterully extending erm 122 on he lever llll with u l"or\verdly extending :i1-lu on lhe lever 91, :is shown in Fig. 3. The lever lll le swung in :ly direction to curry the end ol' the urm 11G inlio'lhe puth olf the rum und projeetion upon the elevution oil. the lreedle .rod by the uelion o1 u eoiled. spring;y .l2-l ronneeted with the arm 122. lliith lhe. end olf the urm 111.3 ,loenled in the lilith ol? (he rum 11S und projection 1.14:, through the einretement olt the (zum with the end elt the urm the lever llll is swung reurwnrdhY about the shzifl't lll, und the moin slmflft 1S is linully brought to reet in n predetermined posiition by the engagement ot the projrmtion with the end o'l' the firm. The uuivement o1l the lever 10G produc-ed by the zufiiou olE the eznn lltl operates through suiluble eonneel'ions to litt the presser-toot ol.' the murhine. luteh iS providell to hold the parte in lhe positions into whieh they :ire moved by the notion ol the cum 1,18 on the lever I lll und. the, eum moves out ol eonluet willi the end o'lE the urm 11G before. the :irm is: ene'ueed by the projeetion 1l.'l, :1S shown in Figi. 25, so that the lever 10G muy be ewung ubont the :iris ollv the trunnion pins illlh to eur-ry the end oil the urm 116 out of the path ol' [he emu und projection by :i eomnernl'ivelv light pleasure on the trendle. '.lhe purl# el the muehine above described huve Snbstuntiully the smile elnistruetion, arrange ment und mode. olI operation :is the Corre- .LmondineY inn-ts ol the nniehine illustrated und described :in the Aehworth patent rel'erred to above.

The rotary loop-talker 8 employed in the present nniehine is olf the well-lmown type fel -lll

constructed and arranged to pass a loop ot needle thread about the bobbin ease without itself' passing` through the lo-op, and known in the art as a rotary hooli rllhe looptalrer is rotatably mounted in a raceway formed b v the suriportingj' plates 126 (see Figs. Li and T), sccined to the traine of the machine, the 'plates engaging; in a peripheral groove in the loop-taker. rThe loop-taker is driven (sec Figs. 1, 2, t and T), by means ot' a gear 128 secured to the torward end ot a shaft 130 and meshing with a series ot gear teeth 132 'formed on the periphery ot the loop-taker. rl`he shaft 130 is driven from a counlerslnrt`t13-t through a bevel gear 136 secured to the eountershatt and a bevel gear 138 secured to the rear end ot the shaft 130. The countershartt 134e is driven :from the main sl att 13 through the interrneshine` spur gears 1110 and 1li-2, secured respectively to the main shaft and to the countershaft. The bobbin case, indicated atr 1li-4. is mounted co-axiallv with the loop-taker in the rear end of .the loop-taker so as to allow relative rotation between the bobbin case and looptaker, the bobbin case having;- a peripheral flange or rib 146 which. engages in a groove 'toi-.med in the interior wall oit the loop-taker. The bobbin case is held stationary during' the rotation of the loop-taker by mea-ns o't retaining' pins 148. These pins are slidablv mounted `forwardly oi the bobbin case in a portion 150 ot the 'trame extending within the Forward end of the loop-taker so that the rear ends ot the pins are adapted to engage in recesses in the bobbin case to hold the bobbin case trom rotation. The retaining pins are acted upon respectively hy the arms ot a spring' 152 which tend to .move the pins rearwardly te maintain the ends of the pins iu the recesses in the bobbin ease. rilhe pins are moved forwardly to withdrawn their rear ends trom the recesses in the bobbin ease at certain times during' the rotation et the. loop-taker by means ot a cam rib d proj ectine` from the interior wall of the looptaker, which is arranged to engage projections 156 Vtermed on the pins. Through the action .of the cam rib on the pins during` the rotation ot the loop-taker, the pins are alternately moved 'forwardly to withdraw their rear ends from the recesses in the bobbin case to allow a loop of needle thread to pass about the rbobbin case. The pins are actuated, however, by the spring 152 and the cam rib'154f in timed relation to each other. .so that the rear end ot one or the other oit the pins is always in engagement with the bobbi n case, thereby hol ding` the bobbin case at all times `trom rotation. A thread tension device 158 consisting); oiE an arc-shaped spring;- plate is mounted in a peripheral `eroove `in the bobbin case and has one end -ured to the bobbin case and the other end tree, so that the thread as it passes bedirection, and the remainder ot the thread is wound on the bobbin in the opposite direc- I5 tion, as shown in Figs. 10 and i3. 'Vi'll the thread wound in this manner on the bobbin, it will he obvious that as the thread is drawn from the bobbin the bobbin will be rotated in one direction until the point is reached at which the direction et the winding,` ot the thread is reversed, and thereafter the bobbin will be rotated in the oposite direction. rhe mechanism tor indicating the condition ot the bobbin thread supplv and tor ejecting the bobbin is controlled. by the direction ot' rotation of the bobbin, the bobbin ejector reinainnig` inactive during` the rotation et the bobbin produced by the drawing ot the thread therefrom, until the reversal in the direct-ion of the winding` is reached, and being thrown into operation upon the stoppage ot the machine following` the reversal in the direction ot rotation ou the bobbin. The bobbin case Het is termed with a boss 160 projecting centrally from the rear wall of the bobbin case within the same in which is threaded a stud 162. The boss 160 and stud 162 term a. support ttor a sleeve 164 mounted to turn loosely on the boss and 100 stud and adapted to be inserted in the central opening in a bobbin to support the 'hobbin. Figs and 8 illustrate clearly the manner in which the bobbin is supported in operating position in the bobbin case. The forward end of the sleeve 16st is slotted at several points, thereby forming a series or yielding projections adapted to engage frictionally the wall of the central opening' in the bobbin. The sleeve is Jformed with a 11o wing 166 projecting therefrom, substantially in the plane of the end wall ot the bobbin case, the wing` being,- located in an opening in said wall. .The bobbin as it rotates tends to rotate the sleeve therewith through the Ytrictional engagement ot the sleeve with the bobbin. During the rotation oit the bobbin in the direction oit the arrows, Figs. 10, 11, 12 and 13, produced by the drawing; of the.. thread Jfrom the bobbin until the reversal in the direction oit the winding of the thread on the bobbin is reached. through the tendency ot the bobbin to rotate the sleeve, the wing is maintained substantially in the position shown in 11'and 12, in engage- 125 ment with a shoulder 167 formed on the end wall of the bobbin case. Upon the rotation ot the bobbin in the reverse direction, as indicated by the arrows in Figs. 14 and 15, produced by the drawing of the thread from tile bolillin alltel' tlle point ol reversal ill tbe direction ol tbe lvilldlle.n oil tile tlll'ead is l'eaelled, tlle Sleeve is rotated by tlle liobbill to Swine; tbe Wille; into tlle position sllolvn in Figi. 1 5.

'.l`lle. lneellallifslll i'or il'idieatilrr tile rondilioll oi tlle llobllin thread alllllplv and lor eieeti're; tlle bolll'lill eolllprieee a level' 1.65% llivoted oll a allait li'll and llaville' :l bebllill ejeeting; arm il@ located at tile real' ol' tbe lloobill ease and eatelldilllgly torlvardl;` telva rd llie slanle, ille Fel-ward eed ol' lvlliell is: al ranged to enter all opening ill tbe end lvall ol the bollbill ease and engiraee tbe bobble. rllie lever 166 normally oeellplefl llle lloflitoll Slloivll in Fie". fl, so tllat tlle 'l'ollva rd end ot die llebbin ejeetinir arm lies a elie'lll: diatallee llaek of the real' lvall ot tlie bobbin ease. Upon Stopping the nlaolline tlie level' l68 ie aetllalied to swine; tlle bollllin ejeetl'ngl al'ln .'olvalfdl;7 troni tlie `position sllolvn in l41 iej. 4l'. The Wing' 166 lvllell in tile position sliolvn in Figs. ll and 1 2 lies in tbe balli of lille end el? tlle bobbin ejeetilnf arm and ia engaged by tbe end ot tbe arm as tile arm Swings torlvardlv and aets'l as :l detent to limit tlle :Forward lnovelllellt ol` tile arlll and the movement ot tlle level' 16S. Under tllesle Conditions tlie lever 166 is Abol-tlv tllerealter actuated to elvinfg tlle arm 172 baeli to its initial lllositien. lllllen the Wing; 166 is swung into tbe position Shown in Fig. 1:1 it lies out ol 'the patll ot tlie lorlvard end el. tlle llolillin ejieetille' arni. and as tlie alln swing@ 'forwardly tlle end of the arnl paeae` throng-ll the opening in the rear Wall oit tlle bobllin ease and engages the bobble. tbe eentaet of the arm lvitll tlle llobllin limiting tlle movement of tlle arm and tlle lever 168. The arm 172 and tlle lever 168 tlnle llave a slightly `g'reatel range or amplitude olf more ment lvitll tlle Wille' 166 in the latter poet tion tllall lvitli tlle Wine; in the lirst position. Under tllese conditions tllie level' 166 ig ort I v thereafter positivel),v aetllated to swine lille l'lollbin ejeetille: arnl still l'artller 4torlvardlv to ejecttlle llobbin 'trom lille bobbin lloldille; sleeve 161i. lflle arln i779. in eolnlee tion with the wine; 166 tllnel act aS deter-ting? deviees to detect the condition ot tlle llobbin tlllead supply.

In the present embodiment ot tlle invention tlle, lnovelnents: ol the lever 166 are derived tllrollgll Suitable eonneetione lrolll the. movements oit the loel; bolt Carrier. 'lllle lever llS actuated to ad yallee and retract tlle llobbin electing' :ll-ln 172 b v means ol all entllvise movable rod 174i secured at it# lf'or- Ward end in a sleeve l Vlgilf'otallv connected by nleane ot a stlld 176 lvitll tile lever and sllpliol'ted at ite rear end b v an arln i8() on the traine llavinea` slot to leeeive a bleek 182 termed on Jalle end o l" tlle rod. lo actuating; sleeve 184; is nlolnlted on the rod. ll'fl lor movement longitudinally olf the rod,

and a eoiled spring; 166 la mounted oll tile rod lvitllill ille sleeve, tbe al'ilillebeing illlel'poaed bellveen lvaslxei's lll and lllll `nlollnled oll (lle rod. Vllle opening;` in lllle lorlvald end llall et ille sleeve lt'lis liol'nled lo allow tbe real' end ol tbe Sleeve lTli lo be iil'oieelefl lill'ollgrll said opening. :rl Sllolvll ill Fie. fl. lvllile llle ollellilrll; in tbe real' end lvall ot tlle lQleeve ISI? is i'orllled to receive tbe llloell lt-ll as .wboell in liiee. 'l and 6. 'ille ll'aellel lr ia arranged to engage eitllel.' tile rear end ol' lle sleeve lll or tbe inwardl v if;

lnojerlilli: E'olll'ald end ll'all ol (be lQleeve and tile lvaaller lllll ia al'l'allgged to el1- e eilller ille lol-ward end ot lille l'lloell' i552 o the inlvardlv lirojeelzil'le; rear end iva-ll ol tlie sleeve lill. 'llle aleeve 161iand rod jl'TLl ll/.lrnlall'v oeellpj.' tile relative positions .llllolvn in Figi. el. `Willi this Construction relative lollglitlldillal n'lovelnents olt tlle Sleeve and rod in either direetioll lvill eolllprega tbe coiled Sin-ine' 166. The sleeve 'lal .is moved longrilodillallv by means et a lever ille) pivoted on a sind llleland bavingll :l forli .'lfll aeellred lo elle arm tllereol lvlliell elllrares tbe sleeve lill and engages between annee 1.66 lolllled on tlie eleovef rlllle pivot ted 1164- is Icarried b v the spaced arms ol a carrier llll welll-ed lo the itorlvard end ot a allld 262 nlolnlted to Slide ill a. suitable bearingl in tlle il'l'allle olf tlle alaellille. The rear end et tile stlld 20:2 is Surrounded by 1 eoiled spring QOl interposed between the l'l'enle and a nut Q06 mounted on tlle rear end of tlle etlld. Tile, Spring norlliallv llolds elle earrier 266 in its lin'litine' position in engement lvitll tlle 'traine and allows tllo 'l 2052 to .lnove :forwardly in its bearing in tlle 'lranle during' oertain n'lovelllents of tlle .lever 1.99. 'lllle tol-lied end of tlle sllorter al'ln of tlle level' 192 embraces a eollal: Q08 lllollnted on tlle 'l'orlvard elld et tlle lorl bolt; earl-ier Fill. and engages between (lane-ea lll 'formed on ille Collar.

l l ll llle collar `206 ia lllrealled on tlle forward end oli' llie look bolt. rarrier so l'llat it lnajv be adjusted lollgi tnl'linallv tllel'eo'l". and serllled in ad'jllated position by means olf a leek not 'Vile parte above described noi-mall)v 0e ellojl' tbe positions sllolvn ill Fie'. l. lvitll tbe Ylorvvard end ot tlle bobbin electing' arm retraeled Al`rolll tlle rear end of tlle llobbill Casse` tbe position ol tbe level' 166 beine` deterlnilled bv llle engapgelnent oit a, projection 2li on tlle lever lvitli a .atop tace on tlle trame. l'llloil stolllllille' tbe lnaeliille as tlle loelc bolt; earl-im' llloves` 'lorlval'dlv atler 'lille enefagl'e- :nent oi tlie Slow speed ellllell. tlle. lever 192 iw :lrtliated to lnovo tlle .Qleeve 184; real'- vferdljv. rlllie movement oli tulle Sleeve tendal lo aelllale tbe rod 171|; and lllle lever lllil to lawine' llle bobbin ejl-etingg al'ln 172 lorlvardlv. lll tlle time tliat tbe forward movement ot lille leek bolt carrier oeellrs, a loop ot needle tln'ead is being' passed about the bobbiu case, and in order that the bobbin ejecting arm may not interfere with the passage of the loop about the bobbin case. the forward n'iovement o'f the arm is delayed until alfter the loo-p is drawn from about the bobbin case by the action oit the take-up. To secure this result the block 182 at the rear end ol the rod 17stis arranged to engage the periphery ol a cam disk 216 mounted on the countershalt 1.34. to prevent the rod lrom moving rearwardly with the sleeve 181 as the sleeve is actuated by the. forward movement ot the lock bolt carrier. rllhe rearward vn'iovemcnt Qt the sleeve, theretore, compresses the coiled spring 186, as shown in Fig. 8. The cam disk 216, however, is formed with a recess 218 .in its periphery, into which the rear end ot the block 182 can enter at a certain point in the rolation ol' the cam disk. lVhen the recess reaches the block 182. the rod 17a moves rearwandly under the influence olf the coiled spring' 186. thereby actuating the lever 1.68 toswine; the bobbiu ejecting arm 172 Ytorwardly into contact either with the wine- '166 or with the bobbin. The recess 218 is located on the cam disk 216 so that the forward m i-vement o: the bobbin ejectingr arm does not occur until after the loop of needle thrald has been drawn trom about the bobbin case by the take-up. Vl`he forward movement ot the sleeve 18st produced through the lever 192 by the rearward movement ot' the lock bolt carrier tends to actuate the rod 1741- and the lever 168 to swing;l the hobbin ejectin.T arm back to its original or normal position. latch is provided tor positively connecting the lever 168 with the leverI 192 through which the movement oit the lever 192 produced by the rearward movement ot' the lock bolt carrier will actuate the lever 168 to swingthe bobbin e,j .\ctin; arm forwardly 'from the position shown in Fig. 8 to push the bobbin from the bobbin holdina'r sleeve, as shown in Fig. 9. rllhis latch, indicated at 2207 is pivoted at 222 on an arm of the lever 168, and is Formed with a shoulder or abutment 22/1 for engage-ment with the torward tace of a block 226 formed yat the end ot the longer arm oi: the lever 192. The latch 220 is acted upon by a spring 228 which tends to swineY the latch upwardly W'ith the wing 166 in the position shown in Finis. 11 and 12. the lever 1.68 as it is actuated to swing.' the bobbiu ejecting arm forwardly from its normal position does not move tar enough to carry the abutment 224 on the latch 220 in front ot' the block 226 on the lever 192. but the movement ot' the lever 168 is arrested by the contact ot the forward end of the bobbin ej ecting arm with the wing'. with the` parts substantially in the position shown in Fig. 7. Under these conditions, during` the movement ot' the into acting; position.v

lever -192 produced by the rearward movemeut ot the lock bolt carrier, the block 226 will move idlyalong` the upper edge ot the latch 220 and the rod 1.741 and the lever 168 will be actuated by the 'forward movemei'it otl the sleeve 1815-. to retract the bobbin ejec tor arm to its normal position. llith the wing; 1.66 in the position shown in Fig. 15, the movei'nent ot' the lever 168 as it is actuated to swing the bobbio` veji-fctor arm 'forwardly from 'its normal position is sutficient to carry the abutment 22st on the latch 'in liront ot the blocl 226. Under these con ditions. as the lever 192 is actuated by the rearward movement o'l the lock bolt carrier. the lever 168 is actuated through the latch to swing` the bobbin ejecting' arm torwardly from the position shown in Figi'. 8 to push the bobbin trom the bobbin-holding.;` sleeve. as shown in llie'. 9. r[his latter figure shows the positions olf the parts just before tho bobbin ejectinfe' arm has con'ipleted its bobbin ejectiirey movei'nent. The bobbin ej'cctinjr arm may act during this bobbin ejes-ting movenunt merely to push the bobbin ott the bobbin-holdina sleeve. Preferably. however.v the action of' the arm is such as to project the bobbin l'rom within the loo p-taker.

rlbe movement o'l the. latch 220 relative lo the lever 168 under the influence ot the spring 228 is limited by the engagement of a stop shoulder 286 formed on the latch with the lever. T his stop shoulder is located on the latch so that as the lever 168 vis actuated lo swingthe bobbin ejecting' arm forwardly to eject the bobbin. the acting;` end ot the `latch will be actuated downwardly to disengage the abutment 224 on the latch from the blocl' just betere. the block reaches the limit ot its YForward movement. During the bobbin ejectine` movement oit the lever 168 the coiled spring 186 is compressed, as shown clearly in 9. and upon the disengagement ot the abutn'ient 224C on the latch 'from the block 226. the coiled springer` 186 moves the rod 1.7% `forwardly. thereby actuating the lever 168 to swingY the bobbin ejecting' arm back to its normal position.

rllhe 'devices for controlling the movement ot the lock bolt carrier may be adjusted to cause the carrier to move longitudinally to ditlcrent extents. In order that the block 226v may move rearwardly to substantially the same. position regardless of the extent of the forward movement ot' the lock bolt carrier, an abutment screw 282 is. threaded into a projection on the lever 192 and is arraiiiged to engage an abutment tace 23-1 on the trame oit the machine to limit the rearward movement ot the right-hand end ot' the lever. The coiled spring 2041 allows the carrier 200 to move forwardly duriine` the actuation ot' the lever 192 by the forward movement ot the lock bolt carrier after the indicating mechanism for indicating the condition ot the thread supply on the bobbin cont-rolled by the rotation ot the bobbin.

14. A sewing machine, having, in combination, stitch forming devices, a thread supply holder, and normally inactive. indicating` mechanism controlled from the thread and arranged to be thrown into operation upon stopping the machine tor ,indicating the condition ot the thread supply.

l5. A lo'clstitch sewing machine, having, in combination, .stitch forming 'devices including a needle, a loop taker, a bobbin, and normally inactive indicatii'ig mechanism controlled trom the bobbin thread and arranged to be thrown into operation upon stopping the machine tor indicating the condition ot the bobbin thread supply. k

16. A lochstitch serving machine, having, in combination, stitch toi-ming devices including a needle, a bobbin hold-er, a bobbin, and means controlled trom the bobbin thread. and rendered active upon stopping the nia'- chine for ejecting the bobbin 'from the hobbin holder.

17. A lsewing machine, having, in combination, stitch forming devices, a thread supply holder, and means rendered active upon stopping the machine when the thread supply holder conta-ins lessv than a predetermined amount ot thread for indicating the condition of the thread supply. l

18. A lockstitch sewing machine, having, in combination, stitch forming devices' including a needle., a bobbin holder, a bobbin, and means rendered active upon lstopping the machine when the bobbin conta-ins less than a predetermined amount of thread tor indicating- ,the condition ot the bobbin thread supply. y

19. A loclstitch sevving machine, having, in combination, stitch forming devices in'-` cluding a needle, al bobbin holder, a bobbin, and means rendered active upon stopping the machine when the bobbin contains less than a predetermined amount of thread tor ejecting the bobbin from the bobbin holder.

20. A ,sewing machiney having, in combination, stitch forming devices, a thread .supply holder, a detector mechanism for detecting the condition ot the thread supply on the supply holder comprising a movable arm, a thread controlled detent for limiting the movement ot said arm normally located in position to engage the arm, and adapted to be moved out ot acting position when less than a predetermined amount of thread is left on the supply holder, means operating to advance the arm beyond the detent when the detent is moved out of acting position, and means rendered active by the advance of the arm beyond the detent.

21. A sewing machine having, in combination, stitch forming devices, a thread supply holder, a detector mechanism for detecting rendered active by the advance ot the arm beyond the detent.

A lo'clistitch sewing machine having, in combination, stitch tormingdevices, including a needle, a'bobbin holder, a bobbin, a detector mechanism tor detecting the condition ot the thread supply on the bobbin comprising a movable arm, means for moving the arm toward and trom the bobbin at intervals, a thread controlled detent for liming' the niov'em'ent ot the "armv toward the bobbin normally located in position to enthe arm and adapted to be moved out ot acting position when less than a predetermined amount ot thread is left on the bobbin, and means 'operatingv to actuate the arm to eject the bobbin trom the bobbin holder ivhen the arm advances beyond the detent;

Q3. A lockstitch 'servingv machine having, in combination, stitch forming devices"l including a needle, a bobbin holder, a bobbin, detector mechanism for detecting the condi-y` tion ot' the thread supply on the bobbin comprising a movable arm, means for moving the arm toivard and from the bobbin at intervals', a detent controlled by the rotation of the bobbin for limiting the movement of the arm toward the bobbin normally lo cated in position to engage the arm and adapted to: be moved out ot' acting position when less than a' predetermined amount of thread is left on the bobbin, and means operating to actuate the arm to eject the bobbin trom the bobbin holder when the arm advances beyond the detent.

24E'. A sewing machine having, in combina-l tion, stitch forming devices, a bodily stationary thread supply holder, a detector mechanism tor detecting the condition of the thread supply on the supply holder before the actual exhaustion ot the thread, and means controlled by the detector mechanism.

25. A sewing machine having, in combination, stitch forming devices, a thread supply holder, and an indicating mechanism arranged to beheld out ot operation While lthe supply holder contains more than a predetermined quantity ot thread, and adapted to be thrown into operation at any time after the thread on the supply holder is reduced to an amount less than the predetermined quantity.

lio

2G. i sewingl machine having', in combination, stitch forming); devices, a thread supplv holder. mechanism arranged normallj,Y to remain inactive and to be actuated when, in the course ol' the, drawing' ot the thread from the supply, the point is reached at n'hich a predetermined positive ipiantitv o." thread is lett on the holder, and indicating means controlled by said mechanism.

27. A sewinpl machine having, in combination, stitch forming devices, a thread supply holder, mechanism ttor indicating the condition ot the thread supply, and means 'for renderingsaid mechanism active when the thread on the supply holder is less than the amount required tor a given length oi. seam.

28. A loelstitch sewing' machine having, in combination. stitch forming' devices including` a needle, a loop taker, a bobhiu, and means rendered'operative hjv a reversal in the direction otx rotation ol: the bohhin :for indicating the amount ot' thread on the bobhin.

Q9. A machine for sewing' seams ol.' predetermined length having, in combination, stitch forming' devices, a thread supply holder, and means actuated at the completion ot a seam to indicate that the thread on the supply holder is less than the amount required 'l'or the next seam.

30. A loclzstitch outsole shoe sewingl inaehine having', in combination, stitch torniing devices including, a needle, a loop taler, a hobbin, and means actuated at the completion of the sewing of av shoe to ,indicate that the thread on the bobhin is less than the amount required 'lor sewing the next shoe.

3l. A loeksitch sewing` n'iachine having', in combination, stitch lorn'iing' devices including a needle, av loop taker, a, hobbin having a portion ot' the thread thereon Wound in oneI direction and the remainder ot' the thread 'wound in the opposite direction. and means for indicating,l a reversal in the direc tion of rotation of the bobbin.

32. A lockstitch sewing machine having, in combination, stitch forming devices including ay needle, a loop taker, a bohhin having a portion oi' the thread, sul'licient to sew a seam ot predetermined length, wound thereon in one direction and arranged to be drawn last trom the hobbin and the remain` der ol. the thread wound thereon in the opposite direction, and means for indicatingl a reversal in the direction ol rotation ot the bobbin.

33. A leclistitch outsole shoe sewing machine having, in combination, stitch forminr devices including' a needle, a loop taker, a bobbin having,` a portion ot the thread, sutilcient to sen' a shoe, Wound thereon in one direction and the remainder ot the thread Wound thereon in the opposite direction, and means reiidered operative by reversal in the direction oif rotation ot the bobhin `tor indicating' at the completion ot the sewing' ot a shoe that the thread on the bobhin is less than the amount required 'lor sewing; the next shoe.

Si. A sewing machine having, in conihiuzfition. stitch forming devices, a thread suppl)7 holder, and meansl actuated on stopping the machine to indicate the condition oiu the thread supply.

35. A sewing machine having, in combination, stitch forming devices, a thread sup p157 holder, devices tor indicating the condition ot the thread supply, and means `for actuating said devices on stopping the machine.

36. A loclstitch senf'ing machine having, in combination, stitch forming' devices inclndinglj a needle, a bobbin holder, a bobbin, stop mechanism for stopping the machine with its parts in predetermined position, and means tor ejecting the bobbin from the bobbin holder.

3T. A lockst-itch sewing machine having, in combination` stitch :forming devices including a needle, a bobbin holder, a bobhin, stop mechanism 'lor stopping the machine with its parts in predetermined position, and devices actuated trom the stop mechanism tor ejecting the hobhin from the bohhin holder.

LAUREN GE E. TOPI-IAM.

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