US905311A - Sewing-machine. - Google Patents

Description

`J. J. HBYS. SEWING MACHINE. APrLIoATIoN FILED JUNE`21, 1905.

Patented Dec. 1, 1908,

'1 SHEETS-SHEET 1.

J. J. HBYS.

SEWING MACHINE.

APPLICATION FILED JUNE 21, 1905.

Patented Dec. 1, 1'908.

'I SHEETS-SHEET' 2.

wineses @mig MZQM.

J. J. 11E-YS.` "SEWING MACHINE. APPLICATION FILED JUNE 21, 1905.

Patented Dec. 1, 1908.

4 7 SHEETS-SHEET 4.4

Inventor J. J. HEYS.

SEWING MACHINE.

APPLICATION FILED JUNI: 21, 1905.

Patented Dec. 1, 1908.

7 SHEETS-SHEET 6.

wj/inese@ gm @L J. J. HEYS.

SEWING MACHINE.

APPLICATION FILED JUNIIzI, 1905.

905,31 1 Patented Deo. 1, 1908.

7 SHEETS-SHEET 7.

UNTTED STATEs PATENT OFFICE.,

JOHN J. HEYS, or LYNN, MASSACHUSETTS, ASSiGNoR, lBY MESNE ASSIGNMENTS, To THOMAS e. PLANT,- OF BOSTON, MASSAOHUSETTs.

SEWING-MACHINE.

Specification of Letters Patent.'

Patented Dec. 1, 190s.

.Application led June 21, 1905. Serial No. 266,244.

To all whom 'it may concern:

' Be it knownthat I, JOHN J. Hers, a. citi.- zen of -the United States, residingvat `Lynn in the county of Essex and State of vMassachusetts, have invented an Improvement in Sewiiig-'lacliines, of' which thegfollowing description, in connection with the accompanying drawings, is a. specification, like letters onthe drawings representing like parts. My invention relates to sewing machines, and particularly to rlock stitch machines employing a cui-ved needle and awl. These .f machines are employed principally in `the stitcliing'ot' -outsoles to the welts of boots and shoes. Machines of this general type areillustrated in Il. Letters Patent. to

.Dancel No. 366,935, dated July 19, 1887, and

Frencliand Meyer, No. 412,703, dated October 8, 1,889. v

- Myinvention-aims to simplify the mechanism 'of machines of this class,` not only for the purpose of economiziiig in cost ofconstruction, but also to-'increase the certainty of operation and durability thereof, and to irendcr the parts in'orefconvniently accessible for purposes ofadj'ustment. and repair.

l l The' Various features of my inventionwill be best. understood from a description of the best embodiment thereof now known to me,

`v and which 4I have illustrated' in the accomconstruction an panyiug drawings, it being understood, however, that my invention is not limited tothe particular embodiment thus selected for illustrative' purposes. This illustration and description are intended for those skilledin' the art, it bein operation of such machines are familial' to the reader,

In the drawings,-Figure 1 in front elevation, partially broken away, shows a machine illustrating 4my invention; Fig.A 1, a sectional 'detail to be referred to;A- Fig."2 is a top oi" plan viewof the iiiachine,`Fig.`l; Fig. 3 is a left-hand, Vside elevation of the hand side elevation of said ni'acliinc; Fig.

is a vertical cross section on the dotted "line i .'i--, Fig. l, looking to the left or towards the middle of the mach-ine; F ig.' '6, a similar cross section ori-the dotted line 6 6-, Fig.Y

assumed that the general parts of the looper mechanism; Fig. 7, a deftail showing a part of the awl actuating mechanism; Fig. 8 is a vertical cross section on thel dotted line 8-8, Fig. 1, looking to the right, toward the middle of the machine, Fig. 1; Fig'. 9 is a horizontal Sectional detail on the dotted linea-9, Fig/8, showing the looper mechanism; Fig. 10 is a detail illustrating a part of the 'thread measuring mechanism .fo'r measuring the thread for different thicknesses of stock.

In'the particular embodiment of'iny in'-` .vention selected for illustration herein and shown in fthe drawings, referringl first to Figsfand 4, the machine head is carried upon* va standard A, which is preferably tubular at its upper end and yprovided with suitable clamping means to receive the vertic'ally adjust-able stem A. This-Stem has its 'upper end provided with a 'llaiiged .head A, to and upony -whichv isboltetl the head casting B, extended laterally' in both directionsand carrying at its opposite ends (sce Figs. 1 and 2) the supporting columns b, b;

the saine being removably secured to said' head casting for convenience in assembling thev machine and for removing its parts for repair, etgc. In the upper ends of these supporting-,columns b yis journaled a mainor camshaft C, upon vwhich are mounted lthe various cams from Which the dierent mo tions areobtained, and which will bere` ferred to from time to time in this descri tion. This camshaft is ext-ended 'to the -le t,

Figs. 1 and 2, beyond its, end supporting column b, toreceive the usual belt pulley or wheel b', which may be belted to anddriven from any suitable drivingor countershai't.l

"Viewed from the frontof the machine.. the

`head casting is provided centrally (see Fig.

or 'pin Jl-, mounted in the upper end of a bracket e ofthe feed slide e. iiei(l4`ig. 7) is provided with arsegmental ioo fulci'umcd loosely upon the horizontal pivot The awl cargaand, driven by the 'segmental gear rl,

J 4 the inner face 'of vthe Cain disk D (Fi s. l 2

vertically,

(seelFig. 5) fand is there fulcrumed loosely -upon the horizontal shaft d, mounted in an upon the head upwardly extended arm B3 Acasting B referred to. Between its ends this (see Fig. 5) is provided With a roller stud d?, that travels in a box cam upon and), fast upon and rotatable Withthe camshaft 4C referred to.'

camshaft causes the avvl lever to be vibrated l Rotationof this and, through its said' segmental gear and awl carrier Vgear d. (Fig. to .oscillate the aWl ,'Fto-cause it to'rise through the Worksupport Z-,ftopenetrate the stock 4.and Aafterwards to drop' away `from-the work in advance of the descending needle.

The awl is employed to -feed the Work;

moved laterally from right tow'leftV (Fig. l),

and for this in the'bracket e carrying -br-a'clre adapted to-'slide velid'e transversely-at the'tfront'of the machine g' in the slidewayje is apart-fof 'they'head casting B,referred to. i s;-slidesai d upri ht awlf' .which projects from and To; reciprocate thi l transversely Sinto'fand' practically through Vsaid bracketggand therefore 'adjustable therendike 'faf rotating' it inone or the d l '.rfacilitate this rotation thej langed head 'tis'illurled and also, for

for "the re'ceptionofian 'operating pin which may be inserted iin jone or the other thereof irecti-on; f Thissleeveis internally threaded uponithe innerendg'of the horlzontal .feed

lever e7.. 'This'lever is extended tot-hel right (Figs. lV and 2)?andat`its outer end is lshaped t'o constitute a' handle' by which it may. be

y swung'tovvards and away from the operator standingatthe 'front' of Between itsfendsftheffeed lever cT Vhas the machine.;v

pivotedon its upper-'side a slide block es, in the 'are grooved actuator ar-mA e9,-ha`ving a 'yoke-like hub el", shown best 4in Figjl, fulcrumed vertically on ,a

bearing c, secured to and upon thehead base B. Thisy yoke-like hub 61 at its upper sfdc, is providcd'ivith an inwardly extended, carrying at its end the upwardly extending roller stud cl3, that travelsin the peripheral path cam e14 of the cam disk E, also fast upon. the camshaft C. Rotation of this cam operatesY to fvibrate horizontally the arc transmits its vibrations throughthe lever e7 to the feed slide andthe avvlv thereon,'and

this lateral. vibration, or rfeeding movement 'adj ustin pur ose it is mountedQ-as stated,v

rooved arm e whichv takes place Without disturbing .the toothed engagement between the awl segment d and its act'uatin lever` segment dtvwhich oscilla te or vibrate'te awl in its curvedvertical path.

The operator 'may vary thcextent of feedv at each'movement of the feed slide, and while the machine isin operation by swinging the actuating lever e7 "towards and away from him, therebyv to position the slide block c further from or nearcrto thc fulci'nm lof vibration of the cam actuated armom. Said ever e7 is 'arranged to travel over a curved bearing plate e (Figs. 2 and il), which is .providedywith a closely arranged series of holesfor the reception of stop pins c. By these stop pins in the different holes re the lever in either direction is obtained; or it'may be lockedjagainst movement in ethcr direction and in. any position of the lover.

The needleland its operating mechanism l arebest shown-in Figs. 2, 3, 6, and `8. Referthe vfeed slide ef.' This feed 4ring -rst to Fig. 6: the curved needle is shown at L, the same being adjustably mountedflilre thefawl, in a carrier t, loosely ful cru'med upon qadiorizontal carrier pin JL?, fas't'ginl the frontend of the rib or support. B2 that carries the Work support.

y v The needle segment L is provided,I with a segmental `gealijlra.'driven b v the segmental gear h4, upon the front end of thc long needle actuatory lever .ZL-5)! extending through to the back of the machine and, like the awl actuator lever,fulcrumedupon the same shaft Between 1ts..ends said actuator lever/ir" is provided withl-'aQ-ioller stud 71., thatjtravcls in a path cam Iii-,15in the right-hand face of vthe cam disk'H`,'.lilre wisefast uponv the camshaft C.' f

Rotation of 'the camshaft and its cam H, causes theneedlelzactuator vlever /L5 to rise ang fall and, through its segmental gear an lthat-upon the needle carrier, .vibrate the' latter and-its .needle,`to cause the latter to -oscillate verticallyl to enter and leave the stock from'abov'. following the awl movements 4described.` l-.The awl rises through thc stock in a position :at the right of the needle, and While inthe-.stock is moved by the feed slide to4 tl1e"left (1Fig. 1) nnt'ilits vertical alinelnent coincides With that of the needle, when it is Withdrawnv from the stock, the needle followingfit'down from above and entering the stock` through the puncture made and leftby vthe awl. The mechanisms are preferably so ytimed that the point. of the needle enters thestock from above, bcforc the vaWl isfcompletely Withdrawn .from bclQW; thus to 'leavethe stock always under positivejar'nil 'complete control,

[To support vthe needle and guide it in its curved path I have provided a usual needle guide its, looselymounted upon the shank of the needlecarrier and provided with a segmental gear fr", that is engaged by a pinion erred' tothe limit of movement of llO lil upon a short shaft It, loosely mounted in said middleframe support B2. This short needleguide Shaft Iz. (Figs. 1 and 3), extends completely through said support B2,

. E with an upwardly extendedarm 11.1

and is' provided at the opposite or left-hand` frame support B2. ,This cross-shaft 7W" ex-` tends to the right (Figi) and is provided at itsend and between the large cams l() and Figs. l and 5), provided at its upper end roller stud it", that travels' in a path cam Il, in the right-hand face o-f said cam disk D.

Rotation of said cam .disk causes said arm` lil to -be vibrated to .ope-rate; through its shaft and the vsegmental gear k1 and its pinV ion lz. and 'connections described, to move l the needle guide forward and downward l-with the needle until it rests substantially upon or -near 'to Hthe work permitting the needle to complete its movement through and relative to said'. needlel'ias guide, andafter the commenced. its upward, retractile movement, theguide goes back with it.

The rotati-veposition of the pinion It upon its carryingshaftmay be varied at will, .thereby tod ete'rinin'e the position of the i need-le guide. The .guide'itselfis detacliably mounted in-usualmanner upon its carrier, toy

enable it tothe readily changed to accommojda te needles of 'di- Herent numbers.

The looperforcarrying the thread around 'the barb o'f 'the needle, after the latter has penetratedthe' stock from above, is shown 4at "fi, 4Fig-1, and .also in Figs. 3 and 9.. .Thi s looper,"itse l f of 'usual construction, is held clamped -by'its shank in the split end of a'loo e'r-carrler. mounted u on a vertical pivot z'-2(Figis. 9 and 1)., said pivot befing'carriedliy anear Hfextended laterally from a .looper slide' zf-,shownbest in Fig. 9. This s hdels mounted to reclprocate from Ifront to y'hack of .the machine Aupon horizoninner ends in a bracket c'', fast. upon the head talguide'rods z (Fig, 8),'siipp'orted at their baseB, said guide rods at their front ends being supported in a yoke it, bolted at its "bottom, to the base of thc'bracket 2'. At its upper end (Fig. 8) said looper slide e" is provided with a stud z', which (Fig. 2) enters andv travels in a path cani u (dotted lines, Fig. 3),-formed in theright-hand face of the large cam disk I (Figs.'1 and 2) fast upon thecamshaft' C. Rotation ofthis cam operates through Ithe parts described to give `to the looper its forward and -back motion.

To give to the looper itself lateral movements which vwhen* coinbined'with 4theforward and. back movements, produce the `thread around and lay vit in'the fast upon one f with a- 1 needle descends, to lay its sultant circular ytravel[necessary to carry the barbfof the needle,.l. have extended the' looper carrier z" (I `ig."9)j beyond orto .thel left of its pivot 2 and have forkedits end to vreceive the slide block il upon theen'd of awl'lorizontal arm 14, fulcrumed at its rearend upon al vertical stud il?. lhe pivot by which said block 13 is mounted upon said arm il?, 1s prolonged vertically to receive the roller z'jl, that enters 4and travels in the peripheral path camz' Fig. 2) upon the cam disk H.

. The resultant movement imparted to the looper bythe mechanisms'described, issuch .that lsaid. looper vstanding normally` in its innern'iost retracted position, is. advanced forward and to vthe right (Fig. l) as the thread Iat the front of the needle, and, as the'. needle retracts or rises through the work, said looper returns partially, until it reaches a position substantially .in the line of draft of thread from the needle to the thread truck, where it remains atf rest until `substantially all thread has been drawn upward through it and the stitch has been "set befor'e'it returns to its innermost position Afrom'which it first started. By thus positioning the looper inline with the nat- .ural draft -of Vthe thread, I avoid all danger ofrabrading and injuring thelatter during the formationlu'nd' tightening of the stitch. The positionof the 'looper in its carrier may of course. hejadygusted .forward and backward, also vertical-ly, by 'means of the split clampv at the front rof the looper carrier, and

the range of movement of the looper may be 'adjusted ylaterally by sliding the cam disk H longitudinally of the camshaft C.

The thread-finger 4whichin machines of this class is employed toengage'and hold the thread at the left of the needle while the looper has laidit around and is holding it at the opposite'side, which withdraws into the machine to measure otf enough thread at the left of the Vneedle to preventl the-thread. reaving across the needle barb during the subsequent formation of the stitch., is lshown at j (Figs. 1 and 6). This thread finger is. formed upon the. lower front endof an up- 'wardly and rearwardly inclined finger bar (I ig. 6) mounted to slide in the support 2. At its u pper'and inner end said fingel bar is provided with a rack that is engaged by a segmental gear jg, depending from a pivot j, carried .by an arm of the shuttle case to be described. This segmental gear (Fig. 6) at its lower inner end` carries a roller stud j, that travels in' a. path cam j, in the righthandface of the large disk cam H, referred to. By removing 4the pivot screw j3 and lifting slightly thls segmental gear j2, to disengage its teeth. from the finger rack de! scribed, the thread finger audits bar may he wdrawn straight out from and at the front of the machine, lwhenever o ecaslon arlses foi-'1.30

drawn from any removing it., When this segmental gear is so lifted,itsroller stud slides along in its path cam, retainin its engagement therewith. This construction is much simpler than. any nowknown to ine for actuating and for permitting the removal of the thread finger.

I will now 'describe the thread" measuring and take-up mechanism. l

Referring to' Fig. 3 at the rear of the ina.- chine and upon the head stein A', is mounted the thread Wheel'm, over which thel thread is i suitable or usual wax' pot, not herein shown. The thread from this wheel'is led straightthrough the stem' A', a-guide tube 1li/,being provided therein for the purpose. Issuing said tube, the thread is carried to and about the tension Wheel m2 of any suitable or vde` sired construction. Herein (see Fig. 1) the tension is under the control'of a spring m3 and one or more adjusting .nuts m4. From this tension Wheel the thread (Fig. .3) is car- "vried upward and over the measuring truck truck m4' yfurnishes means for m4, and downl againA to Jandabout the stationaryl thread truckl ma". This measuring is made vertically reciprocable to enable it'to measure ott 'the thread, said truck for the purpose being mounted' on .the outer end of an arm m5,'-fast upon the end of a short oscillatory shaft-m8 mounted in the head support B2, referred'to (see also Fig. `8). This short shaft m (see Figs. 5 and 10) is extended to the right completely through said head support B2, and at the right thereof, is provided with adownwardly and forwardly extended arm -m7,`titted at its .free end with-an adjustable stop screw m8. The short shaft m is surrounded. by a loose sleeve m, which isprovided outside of said vsupportgaiid just inside of said stop screw carrying arm m7, with an arm m19. At its upper 'end this arm m10 carries rigidly a measuringI head m11, grooved at 1711.2. At its lowerjend this grooved measuring head has y a depending ear m13 (Fig. 5) that stands opposite the stop screur ms, referred to and moving the latter with a certain amount' of previous lost motion represented by the separation of the one from the other. measuring head is the T-headed slide block m14, to which is jointed at 'm15 the .forward end of an actuator rod mi, that extends to the back of the machine and is there adjustably connected to the 'lower slotted end of an arm m17. The hub m18 of this depending arm m", is provided (Fig. 4) with a horizontally extended arm m1, carrying at its free en d a roller stud m2", that travels in a path cam m21 in the'inner or left-hand face of the large cam disk E., Rotation of this cam operates tlirough' the bell crank lever formed bythese'larins m19, m (Figs. 4 and y5) andthe actuatorrod m10 to reciprocate the slide block m12? from yfront from the front end of i opposed to the presser-foot.l

In the groove m12 of this upon the Work varies,

to rear of the machine, and imparting tothe grooved measuring head m11 a corresponding but rocking movement. The length of reciprocation of the slide block mi* being constant, it follows that the extent of rocking or oscillating movement imparted thereby to the grooved -the thread, the ltime of said movement and the extent thereof depending upon the adjustment of said stop screw and the lost motion thereby permitted before itis engaged by the'measuring head. To control its position, said slide block m is suspended m15, in the lower end of a link m22, carrying loosely at. its up er end a stud m23, adapted to be clampe in adjusted position in a slot m24, in the inner end oa-presser# a stud mm., in the head support B2, and at 4 its front end is provided with a downwardly turned and properly'shaped resser-foot m27, risingfrom which is the iandle m28, by which said presser foot may be thrown upward and backward to freethe rwork or to permit ofthe placing of the work upon the work support b2v thatstands beneath and The presserfoot lever m25 at its inner end (Fig. 5) is segmentally geared for engagement by the pinion m2, (Figs. 5, 1 and et), formed on the leftshand or inner end of ahorizontal, laterally extended shaft m30, mounted in suitable bearings on the head. 'Attached to this pinion shaft (Figs. 1 and 4) is one end of a flexible connection oi chain m31, that leads to the back of the machine, Where it is connected to a tension spring m32 controlled by an adjusting device m33, carried upon the head. This spring, by its pull upon said chain, tends to rotate said pinion m2 (Fig. 5) in the direction of the arrowand through the seginentally geared presser-foot lever, to throw the presser-foot downwardly upon and to clamp the work whatever be the thickness of the work. The position assumed by the presser-foot when thus v.pressed of course, according work between it and b2, and this variable to the thickness of the the fixed work support position of the presser-foot and its lever m2 (Fig. 5) necessarily and correspondingly varies the position of the slide block m1* suspended from it.

As the presser foot is lifted to accommodate thicker work, its connected slide block is. depressed and in moving nearer to the axis' of oscillation of the measuring head m11 will tip the measuring head toward the back of the machine and swing its depending 4foot lever m25. This lever is fulcrumed upon Y thereby eosgaii ear m13 said ear and stop screw: before the latter is engaged and moved by the ear throughout the remainmgmovement of the measuring head. Because it is now nearer to the axisA of rotation of the measuring head, the oscillation ofsaid head by and lfrom the bell crank lever m", 'm19 will be enlarged. The' result of this reduced lost motion between the head and stop screw-and enlarged oscillation of the headis to cause said oscillation to commence earlier in the vcycle of operations of the machine and to lenlarge the movement of the thread measuring-truck m4 to cause it to measure off -additional thread proportional to the additional thickness of the work, so asto locate the thread lock in the same position proportionately, between the top and bottom of the thick work that it was adjusted to assume in vthe thinner stock.'

A reduction in thickness of work will cause the presser foot. to drop nearer tothe work support, thereby vraising 4its lever and the slide ment of the measuring arm and thread move? ment.

iVith the foregoing constructionV an automatic variation of the amount of'thread is ,provided by the slide block m1* and its conlocked ixedly in position to prevent any possible displacement of the work; and this locking mechanism, whateverits construction, must be capable of catching and lock-v ing vthe presser-foot inany position in which it may vfind it, whether upon thick or thin stock. In the construction shown a band brake vaf is employed for this purpose. This brake band surrounds the enlarged end of the pinion shaft m3", one of the ends of said band being provided, Fig. 4, with an ear n', resting in contact with the stop screw n2, mounted in an arm u, secured to a part of the adjacentJ column ofthe head. The other and opposed end of said brake band (Fig. i) is connected by'a pin n4, with a short actuator levera, suspended by a connet-ting rod n. from a crank pin nl on the end of the main cam shaft C of the machine. This crankpin is hushed in the end ofthe connecting rod described, to provide for wearf and renewals without disturbinglthe camshaft itself. Referring to Fi'. 4, the brake actuator lever a5 is extended eyond 1tssuslock and reducing the oscillationv .oft-he measuring head and resultant movepension point and is provided at its back end with an irregularly or cam faced head ns, that plays up and-down in front of a fixed roller stud n? on lthe head column b. Atthe proper time in every rotation of the camshaft, this brake actuator a5 is depressed by the crank a7, and the cam faced head as on the back end of said actuator acting against the roller-stud n throws the front end of said actuator towards the front of the machine to tighten the brake band and lock the presser foot.

- Returning now to Figs. 8 and 8: The thread from the measuring truck is carried.

as stated, downward to and about the stationary thread truck m3", thence upward and over the auxiliary take-up mounted in a short lever m3", fulcrumed at m37, and normally lifted by the light spring m5. The extent of movement of this auxiliary takeup is limited by the two stops 3 and l.. From thisl auxiliary "take-up m3, the thread is carried downward to and-about the takeup o, thence again upward to and through the looper e', previously described. The'takeup comprises a pulley or truck upon a vi, brating arm o', fast upon a horizontal oscillatory shaft 02, shown at the lower left-hand portion of Fig.- 1, and mounted in suitable bearings o3 in the machine on the head castings. Near its left-hand bearing said shaft o2 is provided w'ithan upright arm 0*, the upper end of which is connected by a link o5, with the lower end of the cam lever o, fulcrumed at 0T in a bearing on the column b. This lever at its upper end carries a roller stud 0s, that travels in a path cam o vin the lefthand face of the cam disk I (Figs. 1 and 3).

operates gradually to raise the take-up o, to

of the stitch and then upon the completion of the stitch formation, to depress said takeup sharply, to tighten or set the stitch.

Referring to Fig. 3: It will be noticed that the measurmg truck m* is at the leftof the fixed thread truck mil and acts upon the thread before the latter reaches the said fixed thread truck, while the take-up o acts upon the thread at the right of said fixed truck and between the latter and the work. In order that the measuring arm iu measuring off its thread nlay pull always from the wait-pot or thread supply, and not from or move the auxiliary take-up m.",said thread should be locked beyond or at the right of said measuring arm so that the draft of new thread shall come wholly from the thread supply, In order also for the take-up properly to'f'set or tighten the stitch, it is necessary that the thread be locked back of the take-up orto the left thereof (Fig. 3); otherwise` it would draw thread fromlthe thread supply, instead of from and to set the stitch. I accomplish both these results by Y .contribute thread to and for the `formation arm 712, connected at its Wer end by a link p3 (Fig. 4) with the lower end of a depending cam lever p4, fulcrumed at p5 and having its upper end (Fig, v5) 'provided with a roller stud p7 thattravels in av cam 72 in the right-hand face of the large cam disk D. At each rotation of said cam disk the thread locking arm 79 (Fig. 3) is, by the mechanism described, swung to the right (Fig. 3) to press the thread against the periphery of the fixed thread truck, thereby to lock the thread. at that point against movement in either direction; this action, of course, locking the thread truck itself against rotation,

In the operation of .the machine With the thread locked between the locking device p 'and fixed truck m3* as the awl rises to penetrate the work the measuring device mf is lifted to draw a supply of thread from the thread supply and to, measure the same according to the thickness of the work. The take-up is then at rest in itsA lowest position.

Immediately after the measurement of the thread and, just about as the needle reaches its lowest position and the looper moves to lay the thread in the path thereof, the thread lock is released and the take-up commences to give ott its thread to the ascending needle. The lock remains released until the take-up has reached its highest position and has proceeded somewhat in its return or downward movement, when it is restored, in order that in its further downward movement said take-up may tighten and set the stitch without. drawing from the thread supply.

The auxiliary take-up m9 described performs the function of the usual auxiliary take up; namely, the prevention of any slack in the thread during the stitch formation.

Taking up now the shuttle mechanism: Reference may be had to Figs. 1 to 3, inclusive. The shuttle S is mounted vertically at the front of the machine in the position common to machines of this type, and is made to oscillate about a horizontal axis extending from front `to rear of the machine., This shuttle is mounted vto oscillate in a segmental case which is formed of a back portion s rigidly secured to the head support B2 referred to and a front or cap portion s2 removably secured thereto by screws s3 (Fig. 1).

The shuttle itselfis of the usual ltype in outline and, presenting a point s (Fig. 1') shaped to enter the loop drawn up by the has a depending.

the machine and carrying at its front end means to engage respectively the point and tail portions of the shuttle. This shaft is rocked to oscillate the shuttle carrier and shuttle by means of a pinion s1 (Fig. 2), formed or secured u on the inner end of said shaft and engaged) by the segmental and slightly beveled gear a upon the front end of a cam lever 812 that extends throu h to the back of the machine and is mounte like the other cam levers, upon the shaft d referred to. Between its ends said cam lever S12 (see dotted lines Fig. 8) is provided with a roller stud 813. that travels in a path cam s formed in the left-hand face of the large cam disk H. At every rotation of the camshaft the shuttle is given one complete oscillation to cause its point to remove a loop from the needle and cast it about itself an its thread; after which it is returned to its original position for engagement with a new loo Ilfi the presentinstance I have provided means for positively locking the bobbin to the shuttle duringthe oscillatory movement of the shuttle, releasing the bobbin, after the shuttle has come vto rest for a sutlicient period only to permit the necessary thread to be reeled therefrom, which is during thc effective action of the take-up,-after which the bobbin is again locked to the shuttle before the latter commences its return movement. This lock may be friction or positive. As here shown I employ a positive lock and to this end I provide the periphery of the outer {iange of the bobbin with a series of teeth t', adapted; to be engaged by correspondingly toothed locking` block 2, mounted and radially movable in the shuttle. The shuttle face projects to the front somewhat beyond the faces of the bobbin teeth, so that there is no danger of the thread loop catching upon such teeth. The shuttle case (see Figs. l and 2) is provided at the left with a laterally extended ear t5 upon which is vertically pivoted-at 15G a horizontal rocking earrier L". This carrier at its front` side is provided Withan arm t, that reaches around in front of the shuttleland is provided at its free end with a releasing finger t. When this arm is pressed inward toward the face of the shuttle the tapering or wedge-shaped end of said releasing finger is pressed into a recess in the front of the locking block t2 and lifts said block out of engagement with the bobbin to release the latter. When the said arm is thrown away from the face of the shuttle, it releases the locking block and permits it to be thrown into locking engagement with the bobbin. This releasing arm and its carrier maybe actuated' in any desired manner. As here'shown said carrier is connected tothe front end ofa slide' bar 12, which extends inward throu 1 1 a suitable 5` fixed bearing 1513 and is provide at-its inner end with al roller stud t, that travels' inl a path camt, (Fig. 3) -formed on the 'inner face of the large cam disk I. This cam is timed so as to release the bobbin and again lock itat the proper time as hereinbefore stated. v

To spread the needle loop-for the passage of the shuttle therethrough, I provide a usual loop spreader.' and lifter w .(Ij`igs .j1, 4'

and 5), the same being supported by,a pivot lscrew fw', upon the free end of a lifter lever4 fw?. This lever (Figs. 4 and 5) extends in-l wardly and is made fast upon a lifter shaft "w3, mounted in suitable fixed bearings in the machine and at its right-hand end ('Fig. 1) has adjustably clamped thereon an inwardly extended cam lever 'm4, shown best in Fig.' 2. This' cam lever. at its inner end, carries a roller stud that enters and travels ina pathI 25 mation of the stitch, as the needle draws its loop upward from the stock, this'lifte'r is moved to engagel and lift one 'side'of the loop o utward toward the operator, thereby in connection with the inwardly retreating needle, to spread the loop for the proper en trance and passage of the shuttle. As soon as the shuttlepicks oli' the loop from the lifter and needle,"the li'fter drops back to its normal position preparatory to lifting and opening a newloop. This lifter/w maybe adjusted by swinging'I it about its pivot vfw upon the lifter arm, it being held in adjust-Jl able position on said'arm by a clamping screw lw, which is .extended through a slot in the lifter.

Suitable means for heating theshuttle 5 chamber and'its contained bobbin and the 4 provided, but the same are common to machines of this type and form no pa-rt of my invention. A Y

The operation ofthe machine will have been made clear from the 'foregoing description of thev various parts and move# ments.

The machine is much simpler any'f machine known to me for performing the superior in respectto the results attained'by the various movements. For example, there is likely .to hea variation in the awlpoints, due to the grinding thereof. and any variament of the awl carrier and its bracket on the feed slide and with respect to the feed actuating mechanism. This is most conven-4 iently accomplished in my machine (see Figs. 1 and 1n) by the threaded sleeve e.

cam '11:5 upon the outer or right-hand face of 'the Large cam disk E (Fig. 1). In the forother necessary-partsI of the machine areh the particular embodiment thereof herein same -class of work,' andin many ways. is

tion in the awl point requires the adjust- The outer thread on this sleeve 1s relatively coarse and the inn-er thread relatively fine, both, however, being right threads. The effect of this -`is .that rotation ofsaid sleeve in .facilitate the manipulation of the shoe. The

threadmeasuring mechanis1n,in respect to 80 Aits simplicity. its'ease of adjustment, and possible adjustments, 1s also superior to anything known to me.

The locking of the presser-foot in its various positionfaccording to the thickness of Work,.by means of the brake mechanism, is

'much superior to pawl and Iratchet median-- ism's`l1eretofore generally used. The brake is more durable, q uite as secure', and permits of no llost motion, nor noise.

' The thread locking mechanism isalso of the simplest and most ei'ective sort and (see` Figs. l and 4) hyymeans of the split lclamp p",'by. which the depending arm 792 issecured to its shaft 79', permits of ready and sufficient adjustmentfor various sizes of thread.

The looper mechanism is simple/and the length of the looper carrier from the actuating'point to the looper tip, is much less 100 than any looper mechanism known to me; consequently, the movements of the looper .are more positively controlledandwith less wear and tear of the mechanism.

Other advantages due to the simple arrangement, construction and operation of the parts will he evident upon examination, to those skilled in the art, and need not be enumerated herein. The combinations` of parts providing the'se various advantages. are largely referred to in the 4appended claims.

Obviously,- my invention'is not limited t0 shown and described for purposes of "`llustration, but my said invention may be varied without depart-ing from its spirit and'scope as gathered from the present disclosure.

Claims: l 1. A sewing machine containing in combination, stitch forming mechanism provided with an awl, a sliding awl carrier, a threaded sleeve mounted therein, a fulcrum support adjustable in said sleeve, a feed lever fulcrumed upon said support and a cam operated actuator for said feed'lever and relative to' which said feedleVer is adjustable.

2. A 'sewing machine containing in combi nation, stitch forming mechanism provided with an awl, a sliding awl carrier, a threaded ysleeve mounted therein, means to secure said sleeve against rotation, a' fulcrum support ing in its organization a thread finger, a reciprocatory slide bar therefor, .a 'pivoted slide'bar actuator laterally and loosely engaging the said slide bar, and a removable pivot for said actuator, whereby upon removal of said pivot said actuator may be moved away fromV said slide bar to free the latter for its direct withdrawal from the machine.

4c. A sewing machine having stitch forming mechanism combining in its organization a thread finger, a slide bar-therefor having a rack, a pivoted segmentally geared actuator for said rack, and a removabley pivot for said actuator.

5. A sewing machine having stitch forming mechanism combining in its organiza- I, tion a thread iinger, a slide bar therefor, a

engaging the said slide bar, and a removable pivot for said actuator whereby said actuator may be laterally withdrawn, from said slide .bar substantially along the cam surface;

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

JOHN J. HEYS.

Witnesses:

FREDERICK L. EMERY, ROBERT H. KAMMLER.

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