US2390571A - Sewing machine arm - Google Patents

Description

3 Sheets-Sheety l C. E. COLEGROVE SEWING MACHINE ARM Filed April 27, 1944 Dec. 11,-1945.

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Dec. 11, `1945. v c-E. coLEGRovE 2,399,571

' .SEWING MACHINE ARM Filed April 27, 1944 3 SheecS-SheeiI 3 A TTo/e/yf ya.

Patented Dec. 11, 1945` g UNI-,TED STATES PATENT OFFICE SEWING MACHINE ARM Gliarleszl;` Clegrove, Lakewood; Ohio. assigner to Sears, Roebuck and Company,` Chicago, Ill., a corporation of N 'ew York Application April27, 1944, Serial No. 532,987

I5 Claims.

. 'Ihislinvention relates-toa sewing machine and particularly tofthe construction of thesewing machine head. l

An object of the invention is to prov-ide a sewing. machine head wherein: the: arm bracket or gooseneck and" the parts carried therebyv areA so constructed and organizedu that substantially all of the movable parts, the spool or spools of thread, thel bobbin Winder, the threadY to the needle and. various othei1v parts or' elements arel concealed within the arm bracket but are readily accessible for purposes of replacement;- adjustment,V repair andthe like.

Another object of' thev invention is to provide a sewing machine arm. bracket having thei horizontal portionthereof constructed to house and conceal one or'more spools of thread yet at the same' time providing ready access to saidspool or spools.

Another object is to provide a, sewing machine'` arm bracket wherein the spool of` thread' for. the needle* andy the thread' which passes from said spool to the needle are concealed but are' readily accessible for installation or removall purposes.

Another object is toi provide a sewing machine arm bracket which is so constructed that it can house andc'onceal inthe horizontallportion thereof a bobbin winder and` a` spool for supplying. thread to the bobbin Winder, yet has" provision for making: said." spool' andi bobbin` Winder readily accessible;

A further object isto provideV an improvedbobbin Winder that is susceptible ofr being mounted and1 housed within the horizontal portion of a sewing machine arm bracket.

'Another object is to provide a sewing machine arm bracket, that is so constructed as tolconcealV the driving connection between the needle bar shaft and the machine actuatingr source' andA yet permits ready access to' said connection for purposes of adjustment, replacement, repair `or the like..

Another object-is to provide a novel connection between the hand wheel andthe needle bar shaft and which, inl combination with the object just above mentioned, facilitates the accessibility tov the driving connection to the needle bar shaftl although normally completely concealing and housing said driving connection.

AY more general.`object is to provide a sewing machine arm bracket which is so constructed and combined with the'other elements o'f the sewing machine asto reduce to a minimum the exposed projecting parts and accessories-usually; found on= sewingmachine arm brackets; wherefore the' ann bracket embodying the present invention is onits exterior of pleasingv symmetrical appearance.

Further and additional objects and advantages not hereinbefore referred to will vbecome apparent duringV the detailed description of` embodiments of the invention which. is to follow. Referring to the accompanying drawings,

Fig.` l. is a fragmentary front side View of a sewing machine head with the arm bracket thereof shownvpartly in section and partly in elevation.

Fig. 2 is a top plan view of the arm bracketv shown in Fig. 1 with portions of the top cover broken away. Fig. 3 is a transverse sectional View throughA theA horizontal' portion of the arm bracket shown in Figs. l and 2 and is taken substantially ont lines 3."y of said figures looking in the direction of the arrows.

Fig. 4 is a fragmentary end elevational View of the upper part of the arm bracket and is taken 'looking from the right of Fig. 1 or Fig, 2, with certain portions broken away and shown in section.

Fig. 5 is a fragmentary top plan view of the arm bracket illustrating a modified arrangement for leading. the thread from the spool to the needle and Fig. 6 is a fragmentary View, partly in front elevation and partly in section, showing the' arrangement of the needle thread illustrated in Fig. 5.

The sewing. machine head illustrated herein and embodying the invention comprises a bed plate ltlon which is located the arm bracket or gooseneck of the machine. This arm bracket or gooseneck is shown as formed of a metal casting, but it will be understood that said bracket or gooseneckA might be otherwise constructed without departing' from the invention. The arm bracket or gooseneck includes a verticall column Ilv from the upper end of which extends the horizontal portion l2, the'said column and the said horizontal portion being integral with each. other asis common in sewing machine goosenecks or arm brackets. 'I'he horizontal portion I2 and the vertical column Il arev substantially hollow. 'Ihe hollow horizontalA portion |2 intermediate its ends is provided with spaced transversely extending partitions I3 and f4, seeparticularly Figs. 1

and 2. An internal Wall I5 extends longitudinally of thehoriz'ontat portion of the arm bracket from the partition` |53 toward the left' and said wall is. inwardly ofthe front face of the horizontal portion and provides a cavity It adjacent tothe usual' needle bar and take-up mechanisms.

This cavity is normally concealed or covered by a cover member or door I1 hinged at I8 to swing outwardly on a vertical axis from the closed' position indicated by full lines in Fig. 2 to the open position indicated by dash lines therein. The purpose of providing this cavity will later be pointed out.

The arm bracket is also provided internally with a wall I9 adjacent the right hand end of the bracket and said Wall has a slot or opening 29 formed therein and is provided with a bearing boss 2l in which is rotatably supported the needle bar shaft 22. This shaft is also rotatably supported intermediate its ends in a bearing 23 carried by the horizontal portion' I2 of the bracket and the partition I4. The left hand end of the needle bar shaft 22 extends into and is rotatably supported by a suitable bearing, not shown, and carried by the Ipartition I3. The needle bar shaft 22 is operatively connected at its left hand end to the needle bar in a manner well understood by those skilled .in the art.

The needle bar shaft 22 to the right of the bearing 23 has fixed .thereto a bevel gear 24 which. meshes with a bevel gear 25 fixed on the upper end of a vertically extending shaft 26 rotatably mountedin the column I I and extending belowthe bed plate I9 where its lower end is operatively connected to the shaft that actuates the rotary looptaker of the machine which is not shown as ity forms no part of the present invention and is well understood in the art. The needle bar shaft 22 is also operatively connected through suitable mechanism with the feed mechanism of the machine as will be well understood by those skilled in the art.

The bearing boss 2l supports a bearing bushing 21 and said bushing in turn rotatably supports a sleeve y28 that is freely rotatable on the needle bar shaft 22. The sleeve 28 at its outer or right handV Vend is provided with a flange 28a which projects radially outwardly part way of and in contact with the hub portion of a driving pulley 29 and is secured to said hub portion by suitable means such as the screws 30. i

The outer or right hand end of the needle bar shaft 22 is threaded and has mounted thereon a clutch nut 3l which when tightened locks the sleeve 28 to the shaft 22, wherefore the pulley 29 will rotate with the shaft. When the clutch nut 3l is loosened the sleeve 28 is free to rotate independently on the shaft 22. A flexible belt 32 extends around the pulley 29 and at its lower end below the bed plate I around a pulley, not shown, and which latter pulley is driven by the actuating means for the sewing machine, which may be an electric motor or other suitable means. The Aflexible belt 32 and the pulley 29 form, in this instance, the driving connection to the needle bar shaft 22, but it will be understood that a different type of driving connection might be employed should it be so desired.

A hand wheel 33 is secured to the hub portion of the pulley 29 by suitable securing means as, for instance, the screws 34. This hand wheel has a reducedportion which projects through and substantially fills an opening 35 in a removable closure plate 36. The closure plate 3,6 extends from front to rear of the arm bracket and has its upper end fitting the upper anged end of the wall I9, as indicated at 31, while its lower end engages and merges with the vertical co1- umn as indicated at 38. The closure plate 36 is secured in position by means of suitable securing members, such as the screws 39 and 40, see Figs. l and 4.

It will be noted that in order to have access to the driving connection to the needle bar shaft 22, in this instance the belt 32 and the Ipulley 29, all that need be done is to remove the screws 34 and detach the hand wheel 33 and then remove the screws 39v and 49 and detach the cover plate 36. VIn this way access to the drawing connection is readily obtained while said connection is completely concealed normally by the cover or closure plate 36 and the hand whee133.

The horizontal portion of the arm bracket is entirely open on its upper side but may be closed by a cover 4I. The cover 4I is provided on its peripheral .edges with a continuous downwardly extending flange which when the vcover is closed contacts the upr edge of the horizontal portion of the arm bracket and forms in appearance a continuation thereof. It should also be noted that when the cover 4I is closed the said continuous -ange overlies the upper end ofthe closure plate 36 and bears against the shoulder provided on said plate where its upper end is offset toward the left as viewed in Fig. 1. The

cover 4I is connected to the horizontal portion I2 at the rear thereof by a plurality of hinges 42, wherefore said cover can be swung about a horizontal axis to either opened or closed position;

It will be observed that the space in the horizontal portion of the arm bracket between the partitions I3 and I4 is unobstructed except4 for the needle bar shaft 22 and, if one is employed, the sewing light bulb 43, which latter is indicated diagrammatically in Figs. 2 and 3 by dot and dash lines and is shown as located above an opening 44 in the horizontal portion I2. Except for the needle bar shaft 22 and the light bulb 43 all of the space in the horizontal portion of the arm 0 bracket between the partitions I3 and I4 is availablefor the mounting of spools of thread therein. These spools maybe mounted in the hollow horizontal portion of the arm bracket in various manners and one form thereof is illustrated in the drawings and will be described herein by way of example. An irregularly shaped false bottom 45 is removably mounted in the horizontal portion intermediate the partitions I3 and i4. The false bottom 45 is provided at its rear edge with a flange 46 which extends into an elongated recess formed internally of the horizontal portion I2. The false bottom 45 extends vertically downwardly from the flange 46 a short distance and then is diagonally inclined downwardly and inwardly as indicated at 45a, .after which the false bottom extends diagonally upwardly and outwardly as indicated at 45h so as to avoid the needle bar shaft 22 and the light bulb 43. The false bottom 43 extends horizontally from the upper end of the diagonallyV and upwardly inclined portion v4511 thereof and the front edge of this horizontally extending portion of the bottom rests upon an internal ledge 41 formed in the hollow horizontal portion I2 of the arm bracket as clearly shown in Fig. 3.l The false bottom 45 can be snapped into position in the arm bracket and will retain itself therein by its own resilience. Although one or more spools maybe mounted in the horizontal portion of the arm bracket, two such spools are shown as so mounted forpurp'oses of illustration.V

The downwardly inclined portion 45a of the false bottom has secured thereto upwardly extending spool posts 48 and 49 which are spaced fromeach other longitudinally of the horizontal portion and are substantially parallel to the upwardly incover 41|" for the spools 50: and? 5I'.

t v assumer' clinedportiontbi of the: false; bottom.. The; spoor 50 containingv the needle: thread: is mounted on thpostsl; whilea spooril" containine'the thread tlailsito bewonnd'f' oneabobbinacarriedbya con-L cealech Bobbi-nl winden mounted? oir thef post. 49e.. The arrangement ofi thee. posts 48:t and, 4d atl the1 inclination. showm conserves. head room= unclertliev It willf. be un'- derstoodhowever.. that` the posts andspoole could beiarrangedl in upright or'in any other convenient; manner and the. cover" 4t could bei increased in: height. if. necessaryv to provide additional head; room.; It willV also he# understood that the falseA bottom'. 45A.` might. be: secured in: .position in the hollow hori'zlontalpcrtion; of thea arm. bracket by means` of: anchoring. screws.` or by' other suitable means it so= desired; Also: it should.` be: under-Y stood, that. the: spoot postez, 48 and 49. might be directly' carried. by thef bracket. and the" false bottom' omitted.

The needle thread 52 trom the: spool. 50:. passes over: the; partition44 f3'-` and.` through. an eye 53.l 1ocatedzwithinthecavity Il. Theethread.` 52 then passes:- downwardly wit-hin: the cavity to the ten-- sion device 54 and. thence upwardly within the. cavity through the eye 550i the take-upr56, which latter is. concealed; in` the cavity'. From. the eye 55 the thread. 52v passes downwardly within the` cavityy andf. is completely concealed substantially tothe thread guide 5:1 on-- the needle clamp 5.8;

It thusbe Seen` that-.the needle thread; the tension device; and the take-up are alla concealed withinthe. caviin'` I6@ butthat. accessthereto can readily' be` oldca-ined:v by.Y opening thee doorJ on cIo sure.' IJ. Itzwill; also'benoted.l thaty access: to the spools 50- and 5I` can readilywbef, obtained-by' swingingthe cover 4l about the hinges 42".

In` some'cases itI-maybelmore. desirable. not; to provide'the cavity t6 and not. to'concealzthe'needle threadas` it passesfrom the spoor 50 to the-needle;- A11-,illustrationl ofV an arrangement wherein the cavity l5 would-be omitted as would also thedoor or` closure |1 and the needle thread wouldbe ex*- posed. as well.- as the tensionl deviceand: take-up isshown i11.Figs.. 5f and2 6. In. these views the thread 52. passes from thespool 50. to anotch: 59.` in. the front1 edgefof. the horizontalV portion. I2 of the arm bracket. The thread 52f passes from the notch-V 59 downwardly infront of the` left` hand end ofthe horizontalT portion to:v the?- tension' de'- vice. 54a which. isf mounted inv exposed position ontljie front of. the armA bracket; The thread 52- passes upwardly from the tension device 54a and f in front of' the; arm bracket to the eye 55a of the take-upV device 56a and which` device;` inV this instance,- moves up and down in. exposed; position in.` front of the arm bracket. The thread 52'- extendsdOWnWardIy from the eye. 55d. to the thread guide. 51a. of the. needle clampfrr.` Irr orderthat` the. thread` 52 will be heldin the notch Sit` the cover 4 Ir is provided. with a member. (illV having in its lower edge a notch complementary toI` the notch 59, wherefore. when thecover is closed the notch 53. and; the notch inthe lower edge: of the member till` constitute a: substantially continuous orifice through which the. thread passes and by which itis. guided. Except-forthe omission: of the cavity I6 and the location. of thetensicnaand take-- up devices on the front of the horizontal portion of the. arm..v bracket,` thel construction shown in Figs. 5fand 6.-is identical with that'shown. in the other views of the drawings.

Thethread Bil from the spooli 5 I passesv through a. thread. guide or eyelet 62 secured onu. the upper of the` partition- M: and thenceto as. hobbin ai bohbiirwinder' which concealedin the horizontal portiorroiithe arnr hracketi The bobhiir. is indcateds at 63 and. ist removably mounted andi held. on the". split. upper-cv end;l of the vertically disposed spindle E4? of; the` Babbitt. Winder. The lower endl of they spindle-r 641 has ixed: thereto.` a friction wheel; 55: which' when. the bobbin; Winder is operating; extends through the sloty or opening; 2U' in the wall; Hand.: engages the inner face of4 the pulley 2.9i and." is; driven by the' rotation*y of said pulley: f

The spindle 64. of the. bobbi'n. Winder` is.: rota-tfably.' supported: to: turn. onl a vertical` axis. in athub 66: formed' on: the free end of anx arm` 6:1',... thel otherendz 68 ofwhich arm isrocleably supported on a: stud?v 69.` that. is: detachably carriedl by a; lzfforanedf internally ci the. armbracket. A latch plate: 'H is: also: rockably` mounted` on'. the: stud 691i with@ said latch: plate and' said amr 61? being capable of rocking? movement. in; unisonl orrelative to each' other; The latcln platei lil ise provided with an. upturned portion T2 whiclr. con tacts. a side of the arnrt'li so.` that rocking movement-- of; thelatch` plate4 in al'. clockwise direction, as viewed in Fig'. 2. causesthe arm. Seli to.E move with it. in unison. The.` latch: plate 'Irl is' also provided withV an extended cam. portion: T3; for a'. purpose latertobe.: explained.. A spring 14 and av spring 'l5 are mounted. on the; stud?V 69e with` one of said springs arranged to normally rock the i from the inner face ofv the pulley 29. 1 The other of" said springs acts on the`V 61: to move the latter' againstv the projection 1-2S andnia. direct-- tion to engage". theV` friction wheel 6.5: witlr the inner: face: ofthe. pul1ey29.. Aisleeve 'Illv is.' rockably mounted on a vertically extending stud 11 which: is secured internally' ofv ther am. bracket. The sleeve` 'E61 has. xed. thereto adjacent; its lower end: an;` arm: 18;. the fre-e. end'. ot which provided withI `a: cam surface that: contacts thef cama surrface: on; thef part. 13.L of the latch plate Tl and when sof engaged will' act to. hold. the" latchf plate. against rocking movement. under thez-inuence'of the-first spring previously referred toand consequently at suchA time the friction wheel 65: will ber heldin engagement with the inner surfacel of the pulley 29 by the other of said springs and as. clearly indicatedin Figs. 1: andi 2;. The arm 'I8 isr in. other words, a latch which engages the portion 13 of theA latch plate to latch thev bobbin; Winder ini itsv operativef orv driven: position..

Abladef'l 9 has one. of itsendsxed toI the sleeve 'lli adjacent the upper end of thelatter while its outer or free end? extendsto such. location that it, willi lie. between the. anges.l of the. bobbin 63 when the latter. is mounted. on. the spindle. 64.. It will. be` seenv that when the bobbin. vvindez.r isfin the position shown in Figs.. 1. and. 27th-at. is the operative. position andi a. bobbin 65' is.` mounted. on the upper end oi the spindle. andthe thread 61r is being wound' on the bo'bbin said blade T9 con-V tacts the thread as it is wound on the bobbin and when a suilcient. quantity of thread' has been wound thereonthe blade 19' willbe movediand the sleeve T6` rocked The result is that" the latch 118-' simultaneously" will' be rocked'.` and disengaged from the-portion 13 of thelatcl'r plate 1l^, whereuponrsaidlatch plate 1 I and" arm- 6T .will rock' in said clockwise direction under the action or the rst: spring beforev referred to andthe friction wheel" will be* disengaged from'- t'he inner surface ofithe p ulley 29 and-the bobbin vWinder, willthen bein its inoperative position.

It willbe noted that all that is necessary for the voperator to ldowhen. it is desired to wind thread on the bobbin 63 is to raise the cover 4I, place the bobbin on the split upper end ofthe spindle, reeve the thread r6l through the eyelet 62 and start it on the bobbin. Afterv this has been done the arm 61 is rocked manually to bring the ,friction Wheel into engagement With the pulley 29 and the latch 18 is engaged with the portion 13 of the latch-plate'll. As soon as the desired amount of thread has been wound on the bobbin the blade 19 ismoved automatically and the sleeve 16. and arm 18 rocked to release the bobbin Winder so the latter returns to its inoperative position; The operatormay then remove the bobbinfrom the upper end of the spindle 64 and close the cover 4I, whereupon the bobbin Winder is completely concealed.

From the foregoing detailed description of an embodiment of the invention it will have been seen that all of the objects enumerated earlier herein are fully attained, together with the advantages incident to the construction.

'Although sp'ecic constructions have been illustrated and described herein, it should be understood the invention is susceptible of various modications and adaptations Within the scope of the appended claims.

Having thus described my invention, I claim; l. In a sewing machine, an arm bracket having a vertical portion and a horizontal portion the free end of which mounts the needle bar,

take-up and tension device, said horizontal por-l tion being provided with a cavity therein, a closure for said cavity, and means in said cavity and upon which a spool of thread may be mounted, housed and concealed Within said horizontal portion.

2. In a sewing machine, an arm bracket having a vertical portion and a horizontal'portion the free lend of which mounts the needle bar, take-up and tension device, said horizontal portion being provided with a ca vity therein and having an opening in one Wall communicating Withsaid cavity, a closure member for said opening land hinged to said horizontal portion, vand means in said cavity and upon which a spool of thread may be mounted, housed and concealed vwithin said horizontal portion.

3. In a sewing machine, an arm bracket having a vertical portion and a horizontal portion, the free end of said horizontal portion being pro. vided with a cavity in which the needle bar, takeup and tension device are mounted, a closure for said cavity, said horizontal portion being provided with a second cavity therein, a closure for said second cavity, means inv said second cavity and upon which a spool of thread may be mounted, housed and concealed within said horizontal portion, and means for guiding the thread from said spool to said tension device, take-up and needle bar While concealed withinl said horizontalportion.

4. In a sewing machine, an arm bracket having a vertical portion and a horizontal portion containing a plurality of cavities therein and provided with wall openings communicating -with said cavities, said horizontal portion mounting .a needle bar, take-upl and tension device, closure means for said openings, means in one of said cavities upon which spools of thread'may be mounted, housed and concealed within'said' horizontal portion, and abobbin Winder mounted and concealed Within another of said cavities.

5. In a sewing machine, an arm lbracket -hav, ing a horizontal portion provided with a plurality of cavities therein open on one side, closureV means for said cavities, one of said cavities .having va take-up and tension device mounted therein, another of said cavities having mounted therein a bobbin Winder and a third one of` said. cavitiesy having means therein upon Which spools of thread may be mounted, said portion being providedwith means for guiding the thread from' one of said spools to said tension device andtake-up and with means for guiding the thread upon another of said spools to said bobbin Winder.

6. In a sewing machine, an arm bracket having a horizontal portion the free end of which mounts the needle bar, take-up and tensionde'- vice, said portion `being provided withI a plurality of cavities therein, closure means for said cavi'- ties, means in one of said cavities upon4 which spools of thread may be mounted, abobbin' winder in another of said cavities, means carried by said portion for leading thread ifrom one` of said spools to said tension device, take-up and needle bar, and means carried by said portion for leading the thread from' another of said spools to a bobbin mounted on said bobbin Winder. f

'7. In a sewing-machine, an arm bracket having a horizontal portion in the free end of which the needle bar, take-up and tension `device-are mounted, said portion being substantially hollow and open at the top thereof, closure means for said top, means in said hollow portion, andA upon which spools of thread may-be mounted, a" bobbin Winderin said-hollow portion,l and means carried by said portion for guiding threadfrom one of said spools to said tension device, take-up and needle bar and from another of said spools to a bobbin mounted on said bobbin vvinderl,Y

8. In a sewing machine, `an armrbracket having a horizontal portion in the free end of which is a cavity housing a tension device and take-up, said cavity being open on the side of the arm bracket normally toward the machine operator, a closure for said open side of said cavity, said horizontal portion being provided witha second cavity open at the top of said portion, a closure for said second cavity, means in said second cavity upon Which a spool of thread may be mounted, and means within said portion for leading the thread Vfrom said spool to said tension device and take-up. Y

9. In a sewing machine, an arm bracke'thaving la horizontal portion, the free end of which-is provided with a'cavity having mounted therein a tension device and take-up and having an open side facing toward the operator of 'the machine, a closure for said cavity, said'portion inwardly of its free end being substantially hollow and open on one side, a closure for said open side, a bobbin Winder mounted within the substantially hollow portion, means within said substantially hollow portion and upon which spools of thread may be mounted, and means within said horizontal .portion for leading the thread upon one of s-aid spools to said tension device and take-up and from another of said spools to a bobbin mounted on said bobbin Winder. f

i '10. In a sewing machine, an arm bracket having a horizontal portion, said portion being provided in its freeend with a cavity opening toward the operator of 'the machine, va closure'for said cavity, said portion being substantially hollow .and open `at .the top, a closure for said-top and extending substantially the length of said portion, said cavity having mounted therein a tension device and take-up, a bobbin Winder mounted within said horizontal portion, means within said.

horizontal portion upon which spools of thread may be mounted, and means within said horizontal portion for guiding the thread from one of ,said spools of thread to said tension device and take-up and from another of said spools of thread to a bobbin mounted on said bobbin Winder.

11. In a sewing machine, an arm bracket having a horizontal portion provided with a cavity open at the top, a closure for said open top of said cavity, a needle bar shaft rotatably supported in said horizontal portion and extending through said cavity, a. false bottom mounted in said cav'- ity and having a part overlying said shaft, and means carried by said bottom and extending at an angle to the perpendicular and upon which a spool of thread may be mounted.

12. `In a sewing machine, an arm bracket having a horizontal portion provided with a cavity open at the top thereof, a closure for said cavity, a needle bar shaft mounted in said portion and extending through said mounted in said cavity and having a downwardly and inwardly inclined part and an upwardly and outwardly inclined part avoiding said shaft, a post carried by said iirst part and arranged at an angle to the perpendicular and adapted to have a spool of thread mountedl thereon and concealed within said horizontal portion.

13. In a sewing machine, an arm bracket having a vertical portion and a horizontal portion provided with a cavity open at the top of the horizontal portion, a closure for said cavity, and a bobbin winder mounted in said cavity and havcavity, a false bottom' ing a bobbin receiving spindle extending vertical.. 1y of the cavity.

14. In a sewing machine, an arm bracket having a horizontal portion provided with a cavity therein open at the top, a bobbin Winder mounted in. said cavity and including a bobbin receiving spindle extending vertically thereof and having xed thereto a friction wheel, said arm bracket including an end Wall provided with a bearing through which a needle bar shaft rotatably extends, a driving pulley mounted on said shaft exteriorly of said wall, said wall being provided with an opening through which said friction wheel projects into driving contact with said pulley, when said bobbin winder is operating, a driving connection to said pulley exteriorly of said wall, a closure member cooperating with said wall to conceal said pulley and driving connection, and a closure member for said cavity and cooperating with said first named `closure member to provide a symmetrical appearance to the arm bracket.

15. In a sewing machine, an arm bracket having a ventical portion and a horizontal portion, a needle bar mounted Within the free end of the horizontal portion, a take-up and a tension device mounted on the exterior of the free end of the horizontal portion, said horizontal portion having a cavity therein, a closure for said cavity, means in said cavity and upon which a spool of thread may be mounted and housed within said horizontal portion, and means carried by said horizontal portion for guiding the thread from said spool of thread through the cavity and to the exterior of the horizontal portion and to said tension device.

CHARLES E. COLEGROVE.

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