US2329484A - Sewing machine - Google Patents

Description

Sept. 14, 1943. Q QUIST 2,329,484

- Y SEWINGAMACHINE Filed Maljch 30, 1940 3 Sheets-Sheet l nf/m1555135.- v INVENTOR.-

l Oscar Qus,

A TTORNE YS.

sept. 14, 1943.

SEWING MACHINE Filed Maron so, 1940 W I TNESSES:

3 Sheets-Sheet 2 BY @mf/@2M A TTORN E YS.

Sept, 14, i943. o. QulsT 2,329,484

y SEWING MACHINE Filed March 50, 1940 3 sheets-sheet s 1NVENToR. -Oscar Quasi;

BY 1mm ATTORNEYS.

turing andlassembling costs, andtowardsecurchine :conveniently embodyir Patented Sept. 1.4, 1943 assignorto Union Spef cialMachin'efConipany, Cljicagf,Ill., a corpo? y.

ing morexsilentan'defcientoperationf Thiso jectiVe/I attain fas vhereinaftermore -fully dislclosed; by coordinating the needlefa'nd -feed 'opl erating means for actuation `by a r4single .flflzonnection withv a 'sewinglmachine having theabve attributes,l I further aim' to -majlefit possible, '.through 'provision' of a single regulating means such as hereinafter disclosed, whereby'the 20 feeding movements of the needle' andthe -feed e;

) y' dogmayf;beicornpensatively and simultaneously :increased "or; decreased to' variy the stitch` length.

i. .Otherobj'ects'liand corresp'ondingadvantaesof invention. iwill iappear.; from the following-detailed .zldescription l 'o'f :1 the: a'ttacheddifavizing's,l Whereinij, '1.1 Fig.-1'isa'yiewppartlyjntf nt elevatio' nd ."partlyyinlongitudinaliisection; f Iail'sewinglmath re ent/'mfnprovement'sxfA .l ,:zfg i- Fig. 2 shows the machinein' inverte :plan Nvlth .thecoverof 'its' oil isumpi remfoved tofexpdse m- .nrtantgpartswvithin thepmachine' frame 3 L FigsljgB Vandil aretransversexsectionstaken4as indicated respectively by.. i the'f ang'fleda` i'arrows III-f-III and I VIV in Figsfll and i2;

- 'Fig.;,5, is a fragmentary Viewinsidej: elevation l .showing the regulating meansabywhich; the feed- ,ing movements'of;` the needler :and the, Ifeed. dog canbe adjustedyandlr'; '51:1 e1: f fif Fig. 6 is a yiew,`partly ingperspective.andpartly in' section, showing the.regulatingmeans anclcere' tain parts of the needleandffeedact atingmechanlsmj Y .i 155 ,.l c

. t'llheiframei o f, thei'sewing machine hereinillusrltrated"gprovides a4 horizontal .work- .spportn 0y l Y Wherefzom y rises, at, one gend; la., gholldwcstandard f glfl ;,v .vgzliichsustains; an '-,oyerhangingjin'eed eza'rm Vstandard .1 lily arercontinued below. the;.W`ork supireciprocatory' move'ments farejirnpartdt. .the 'needle-bari 28 kin aenerally' Wellfknown manner,A Awhereby the needles .31 at ythe flower end ofsaid bar. are" Ypassed. up 'and dowln through ia throat VSecured the left jfhandfendi Aof thers'lee'ie! Af2 I iwithin' the` needlehead r |3 isi a'p'endant. arm-.40, which; through@ a" horizontailink .4 I', Ais k.coupled Awith the needle bar carrier29. '.Thusgas the sleeve -2|' is oscillated, the needle barlis'sw'ung laterally inlgt'he direction of feeding faboutthe fulcrum axis 30 'of the carrierizll."V Arranged to vcooperate with th'eneedles 31'inthef'stitch.formation bel-OW 'the vWork support L li,is' a pair.' Iofl verticali Aaxis .ro- :tary' hooks. 42.` l Secured to lth'e' shaft's143 lofi the r'otary lo'oks '4 2 lare' spiral? 'gear y pinionsl44 ..which Amesh respectivelyWithespiralgears'4 Bion a rotating shaft`46` suitably j-ournalediin the? fmachine Lfram'e'f-'below 'Y thellwork l support: From! lFigs. l and l 2 it ,Will bei' noted .that I thel y"shaft S 46 lextends "through'af bearingill'l intol` the oil' su1np`1t5,;r'f,and "moreover that it isfvdriv'fthrough-af'train-of spur'gea's 48; 49 and llwithin the.y hollow yof the "of the gears 'being such'fthatl the f-tfWo shafts .are

-iotated` inithe `Asaineidirection andlatithegsame spe-edil operating upwardly through asiotsfm the throatfplatef38is"afe`eddog'5'lwlichis'a'djust; y y ably secured to the feed bar 52.

52 has anY arnizwhich underreache's fthe' shaft 46 aridi which is connected tothestrap link 15,3 'ofi an eccentric 54lon said shaftfwiththe 'resultt'nat4 up 59, see Fig. 4. By means of a vertical link the arm 59 is connected to the horizontal 'extreme ity 6| of a bell crank lever 62 secured tothe right.-

hand end of the sleeve 2|, 'see Figi-"1j standard II. The dependent Iarm`63 of lthe bell crank lever 62 is pivotally connected at 64 to a due to connection of the bell crank lever 62 to the slide collar 65 at the lower end of said rocker, oscillatory movements are concurrently imparted to the sleeve 2| and to the feed rock shaft 51. As a result, the needle bar carrier 29 is swung to and fro in the direction of feeding in synchronism vwith impartation of feed `movements to the 'feed dog 5I. Upwardadjustinent ofthe fulcrum '68 of the rocker 61 loynieans of the regulating screw 16 from the. position shown in Fig. 4 will obviously be attended by concurrent compensative increase in the amplitude of the needle swing and the feeding movement of the feed dog I, while,

conversely, downward adjustment of said fulclevised sleeve 65 which is slida'ble on the lower f i end 66 of a rocker 61 whereof the vfulcrum is'indi-` cated at 68. The upper portion 69 ofthe'rocker 61 is engaged Vby asleeve 1D having a lateral strap portion 1 I Aeng-aging an` eccentric 12er; the `shaft 25 withinthe standard II betweenthe ybell 1crank 62 andthe spurpinion 5D. [The f-ulcrurn {58,see Figz 4, has Yits ends secured in a yo'ke collar 13 at the, lower endof -a cylindrical-slide145coniined -forlendwse shifting in a boss 1 5 at thef-rontfof the `standard I I-. The slide 14 gisinterna;lly `threaded for engagement by a regulating lscrew 16 having va -manipulatinglknob 11atjits upper end. Secured by-set screws 18 vertically within; a bore in the boss `alongside thebor-e 'for theslide 1,4, isarod 19 which *extendsfabove said boss-and which has its upper end bent laterally -and forked,

as a-t 80, Vto engage-between the manipulating knob 11 `a-ndna shoulder adjacent the top O f. the scr-ew 16'. As shown Ain Fig-6, thecollarV 131s formed with alateralflug projection v81|; atright angles `to its vclevis which engages a longitudinal slot 82 in the lower end of the rod 1-9 whereby the slide "14 is h eld against irotation inpthe 'boss 15. A Vset ;screw;83y ,serves to :prevent displacementfo-f the slide 14 in vertically adjusted posit-ions.

vOperative to oppose the feed ydog 5 I is `a presser foot -84 which-yispivoted vat ,8,5 to 4a shank member 86,:secured to the lower end ofa presser bar 81. After more or vrlesscom-m'onpractice, the .presser Yloar;8f'| is guided for endwise movement-*inthe needle ,head I 3 of the machine and is subject to the pressure -of aA-helical "spring 83. At its flower end the `spring '88 bearsuponv a collar r89 secured -to the presser bar 81 Awith-in the needle -head I3,

and, at itsftopgabutsgthe lower end'ofna guide bushing 90 which is ,screwed into-the needle .head

I3, from above andlwhichvhas Va manipula-ting knob 9| onitsprotrudingend lnorderethat the Apresser footx84 maybe elevatedfor Aconvenience `of initially 'inserting Ythe Work beneathait, there connected, 'by means ofalink 95, with the -collar -89 on the presserbar .8:1; and's'ec'ured t'o saiclfshafit within. ythecentral Ihol-low of the needlesarm I2 `is. a` leve'r 96 which projects horizontally youtward through a :clearance-opening `Ainthe rear side of .the needle arm `I 2 foriconnection thereof, through meansvof a linknrod shown V-at 911m Figs. 3. *and 4 to a suitable kneev press oryfoot `tread-lenot illus;-

t-rated. .1; .i The operation of :the frnachineis as follows:

yByaction of the eccentric` 12 'on the upper rotating'fshaft 25, the double endedfrocke'r 61, -is constantly oscillated about the fulcrum pin 68, and

"Crum will bevattended by compensative decrease in the amplitude of the needle swing and shortern-ng ofthe :feeding stroke oi the feed dog 5I.

Such adjustments are facilitated by virtue lof the provision of numbered graduations (Figs. 5 -andxiil` von the protruding upper end ofthe :gauge bar 1,9l forcoord'ination with the top of Vthe cylindri cs'lide'v14,.g i i The parts within ythe ystandardjl `are all v,lubricated with loil dispersed by the transmission gear .trainY whereof `the lower ,wheel 48 dips linto 1.a supply of oil at the bottom of the sump AI5 which is normally maintained at the glevel indicated at L in' Fig. 1, Thebearings -I9and A`2|) forqthe ,sleeve 'Y2-I .are individually lubricated with oil introduced by Way of vertical ducts l98 and -99 `in the partitions- I1 and I- 1below a retractable covel` |03, some of suchen-finding its Way to the inner bearings 22 and -23 for the rshaft 25 by Wayfof communicating ports lvshow-n atl and |01 respectively in Fig.` l. The intermediate-chamber within the 1overhanging arm lf2 Vmay bexutilized, as shown, to 'house the needle, thread tensions 4|02 which K are accessible upon retraction of the vcoye1 |ll3. ,y 1, .l Havilngthus -desonibed my invention, I claim Y yApsewing machine, :comprising angendwi'se reciprocative needle bar; a` carrier guide forV the needlebar suspended from'a xedpivot for movement lto and 'fro laterally irrithe vline of-feed; a work feedingmemberya rotary :shaft with means for reciprocating the needle bar in its carrier vIguideg.. an. 'oscillatable sleeve coaxial. with. 'the sha'ftypmeans -for oscillating the sleeve; and means-'connectingthe'sleeve with-the needle bar carrier guide and the feed member-'forconc'url'rentactuation'thereby. i.. L.

, :2. `A sewingi-*machine v-aoco'rdi-ng .tofifclaimL wherein .the needle. 'carrier'. zg'uid'e' isf suspended from fa :station-arytpivot fstu'd:.. in the 'needle head wall sabovefthellevel of the rotarys'haft. f f

3. A sewing machineaccording clairnl, .wherein the sleeve is oscillated throughconnections interposed between it and the rotary shai-t.

I4. A` v"sewing 'machine accordingfito "claim vLl, wherein the means for oscillatingvthesleeve fin- 'cludes 'ai y'bell crank v=lever onhth'e latter,` a -rotary 'actuator 1lon .`tl'1e:shaft,v .and mear-1s connecting `saidlevend-,o the rotaryfactuator. y

5. AA sewing machine according to claim ll, wherein/the means vfor 'oscillating the :sleevelinlcllldesia' -leve-non the latter, an eccentric on lthe rotary Sharma .m'edialiysfulcrumeeromanian;a collar :slida'ble alongioneend-orftneiroekrkair and Apivotallyiconne'ct'e'd o the lever, 'anth-'Jlcollar slidablei along 'the z 'other' end. iof the 'Iro'ke'r Jbar and. hav-ing a strap connection with f the .'fecc'entric fon'lhefshaft. v '.'1

6. A sewing ,'.machme acc0rdir1s-to01aim 1, .wherein fthe means :for-foscillating theleeveflincludes a lever on the latter, an eccentric on the rotary shaft, yav medially fulcrumed rocker '.bar,

`a, collar slidable along one end ofthe'rocker bar and pivotally; connected to thelever,y another collar slidable along the otherend ofthe rocker. bar

and having a strap'connectionwith the eccentric .j-

on the shaft; said .machine furthen` comprising means forshifting the fulcrum forthe rockersbar bar andhaving a'strap.connectionwithgthejecf tovary the oscillatory movements of the sleeve Y and in turn the lateral movements impartedfto kthe needle har carrier guide. f

7.*A sewing machine according to claimtfl' wherein the means for oscillating the sleevein.- cludesl a lever on the latter, an veccentric onthe rotary shaft, a medially fulcrumed'rocker/.ban a collar slidalole'along-oney end-of the rocker Ahar `and pivotally` connected to `the* lever;v another collar -slidable 4along the other end of the rocker bar and having a strap connectionwith the-eccentric on the shaft; said machine furthercomprisingvmeansfor shifting the fulcrum jforgthe rocker bar to varythe oscillatory movementsof the sleeve and in turn the lateralmovements imparted to the needlebar carrier guide, the latter means including a slidewhich supports the fulcrum for the rocker bar and whichisconnedin means for shifting said slide. i y

GIO lthe oscillatory movements of thevsleeveandern collar slidablef'along the other vend of; ther rocker centric on the shaft; wherein the,feedingfmeans includes .a1 horizontally reciprocating feed dog; wherein ,thel interposed connections whereby the feed dog is .actuatedy ini synchron'ism` withthe needlegb'argcarrier guide id erive, their movement `from, the-Jever; and; wherein; there'. is-means -for shifting; the fulcrum for :th'ef rockerbarzto :vary

turn the f eeding .feeddoaV f A 1,2.A sewing machine comprising, in Combination; afrarne withfa work; support and a lh'orizone movementsof the needle and -the 315 tal arm overhangingthe worksupportyafhorizon- :tal rotary shaft journalled on said arm; a vertical needle bar;,meansfwhere by theneedle bar is reciprocated endwisefro'm therotary shaft; a kcar- I rier guide fortheneedle lharisupported atgthe go end of the overhanging arm with capacity for being movedrto andvv fro laterally in` thedirection kof feeding.; ,an oscillating.,sleevesurronndinggthe vsh-aft; interposed .connections .at the ,freer Llend ofv thefoverhanging arm ,whereby-the; needle fbar i 25 carrier guide is moved :is-aforesaidl :fromgthe a fixed portion yof the machine, and regulating 8. A sewing machine kaccordingutoi claimY 1,

rocker-bar to vary the oscillatory movements of the sleeve and in turn the lateral movementsimparted vto the needle bar carrier guide, the. latter sleeve;vmeans at thev anchorage endg-of theoverf `hanging arm; for oscillating the sleeve. A including -v alever on the latter,` an eccentricgon 'the'.ar'otary shaft, 'a medially `fulcrumed t rocker bar, ,a ,collar slidable along one endpofv the rojcker banandlpive otally connected .to the lever, and anotherecolla-r Y slidable.. along the other end of the rockeri 'bar and having a strap connection lwith thev eccentric on the shaft; a feeddog operative upwardthrough the. work support at thev regionof,l stitohsformagtion `a ,ro ck shaft extending longitudinallygof'the machine and having a rocker thereon for imparting horizontal-feed movementsftosthe feed. dog;

means including Y,a slide which vsupportsthe'ful'- crum for Vthe rocker bar and which is confined in a fixed portion` of thezmachine, and a regulat.-

ing screw heldv against endwise movementljand threadedly engagingsaid slide. i L 9.A, sewingmachine comprising, inzcombina.- tion, alvertical needle bar; workfeedinglmeans; a .carrieng'uide for theneedle .bar movablev toland frolaterally in` the line of feed; a rotary horiy zontal shaft with an actuator thereon for imparting endwise movement tothe needle bar; an oscillatable sleeve surrounding the shaft; separate connections interposed between the Vsleeve and the work feeding means and the needle bar carrier guide for actuation thereof in synchronism; and means for oscillating the sleeve.

10. A sewing machine according to claim 9, wherein the means for oscillating the sleeve includes a lever on the latter, an eccentric on the rotary shaft, avmedially fulcrurned rocker bar, a collar'slidable along one end lof the rocker bar and pivotally conneotedto the lever, another co1- larv slidalole along the other end of the rocker bar and having a strap connection .with the ec-l centric on the shaft; wherein the feedingmeans includes a horizontally reciprocating feed dog; and wherein the interposed'connections for actuating the feed dog derive their movement from rotary shaft, a medially fulcrumed rocker'bar, a collar slidable along one end of the rocker bar and pvotally connected to the lever, another chronismv with` the to and fro movements Jofthe anda Aconnection Vextending ,down from. the ,lever movements-are imparted to the `feed dog inf synneedle barcarrierguide, j ,Y Y, 13. A sewing gmachineaccording, ,to claim, v2, wherein ,the voverhangingi;frame 'armnis hollow and sustained by a hollow*standard-fromv one lend .of the'work support;1wherein ,thefeedrockJ-sha'ft extends A into4 `a downward prolongation pf Jthe standardkbelow; .theg-gwork support; wherein` the rotary shaft, the sleeve and the needle bar and the carrier guide actuating parts are all enclosed within the hollow of the overhanging arm; and whereinl the sleeve oscillatingl parts and the downward connection from the lever to thek feed bar rocker shaft are all housed within the standard.

14. A sewing'machine according to claiml 12, wherein the overhanging frame arm is hollow and sustained by a hollow standard from oney end of the work support; wherein the feedrock shaft extends into a downward prolongation of the standard -below the work support; wherein the rotary shaft, the sleeve and the needle bar and the carrier guide actuating parts are al1 housed within lthe hollowof the overhangingarm; and wherein the sleeve oscillating parts 'and the downward connection from the lever to the feed bar rockershaft are all housed within the standard; and wherein means takes lubrication oill from a sump in the bottom of the standard and dispe'rses it to automatically lubricate the parts enclosed in l said standard.

r15. A sewing machine according to claim 12, wherein the overhanging frame arm is hollow and Vsustained by a hollow standard from one end of @aforesaid tothe feedv rock shaft wherebyth'elfeed 'the carrierguideactuatingpartslarefall enclosed within fthe Ihollow -ofr-'the 'overhanging arml; wherein 'the sleeve Voscillating partsandithe :down- Vwhereiifrmeans is .provided .for shifting 'the ule crum `for .the rocker bar to vvary the .oscillatory movements of 'the sleeve and in turn the feed 'movements imparted .to 4the -needle .and .the feed dog, .the latter .means including va slide conned lito'ventical movement in a `lug at the :side of the 'ward connectionfrom the lever 'it'olthe feed bar rocker shaft .are 'all housed Within the standaml;` wherein looper means cooperate with fthe 'needle' 'below the work support; `.whereina 'rotary Sloop actuating shaft extends longitudinally 'beneath `the work support and enters the downwaifdipro- -longation` of the standard; 'wherein a train lof gears :connects vthe looper :actuating shaft. with I1 the vfirst mentioned .rotarylshaft and-wherein lone of the gears of the ltra'in fdipsinto-a supply of -oil in the bottom -of ith'e standa'rdu-and :dislp'erses iitto automatically .lubricate 4thetp'arts within the'standard.

wherein the overhanging .frame arm -islhollowl'and sustained fby ahollow vsin'ilndard ifromzone end of the work support; `4Wherein the feedero'ck :shaft extends .into Aar downward 'prolongation of '.t'h'e.;

standard below the kwork support; i kwherein the Irotary shaft, :the sleeve, the :needle Jbar fandlthe carrier:guide:actuating parts are allfhousediwith- 'in the holl'o'wof the overhanging .armrand whereinthe sleeve oscillating :parts and the idownward 1' connection from the lever 'to @the :feed bar rocker vshaftare all.lhoused xwithin the standardixan'd wherein means `is fprovi'dedfior shiftingthe Ifulvcrum 'for *the rocker ibar tovar-y the oscillatory movements of the sleeve .an'd lin iturniwthefeedmovements .imparted to the :needle :and ltheilfee'd dog. i

1.17. A .sewing machine' .according to o'laim' :12, whereinthe-overhanging frame 'armsisahollowand :sustained 'by 4a hollow standard from one end of.I

the work support; wherein the feed '.rockfshaft lextends `.into :a downward: :prolongation :offthe standard below the work support; wherein they rotary-shaft, 'thesleeve, and fthe-'needle bar and 'the carrier guide actuating parts .are all :housed `Within the overhanging'arm; andwh'erein :the

'sleeve oscillating'parts and the downwardtconlnection Vfrom the rl'ever 'to the feed bar .roc-ker Y f 16.7A sewing machine according `to .claim 112,

standard, and vregulating lmeans .accessible at theexterior of the. standard 'rior adjusting. the

slide; t

18. A sewing machineY according to claim l2, wherein the -overhanging .frame .farm is Ahollow Yandsustained by .a hollewfstandard fromlone end ofthe worksupport; 'wherein sthe feedaockshaft Aextends into la .downward :prolongation of .the standard Ibelow the Work support; wherein .the `rotary shaft, fthe sleeve, -lthe needle ibar, `and .the carrier guide actuating -partsare .all ahoused wvit-h- -in the. hollow oflthe -overhangi'ng 1arm; r.wherein the .sleeve :oscillating lparts. and the :downward connection `from the lever lto the feed :barfrocker shaftare all housed withinthe standard; whene- Iin means vis provided forfshifting @thezfulcrum for the Arocker bar tto :vary fthe oscillatory movements `of-the sleeve andfin turn fthe feed 'move- .ments :imparted .tof the :needle .and the feed fdog, the latter :means including a slide 'confined to v vertical movement .in `a :lug 'on Itl'ie outside .of

shaft 'arefall housed lwithin `'the'.standard;andl C rthe standard, a `regulatingscrew fengagingzthe `'slide and :extending .up :in the .illlg :to 'the Vexfterior, andmeans for .preventingLaxialzmovement ofvsa'idscrewf 19..In a :sewing machina :a work ssupport; a rotary drivesha'ft;l stitch :forming mechanism includingV an axially .reciprocative needle which passes down through the Worksupportzand .com- 'plemental instrumentalities .to cooperate there.- vwithbelow theY work support; workeeding means `includingva :presser .foot :and an opposing '.four -motionfeed .dog; .and mechanism for .simultaneouslylactuating the feedv dog and imparting work feedingfmovements .to theneedlesaidvmech- 'anism `including .a .rotary actuatonon the drive shaft, :a member yoscillated by said factuator, .0pferating connections 'interposedbetweenthe.mem-

ber and the feedxdog, tand `separate .operating |connections extending .betWeenZsaidmember `and the needle, .the .last mentioned connectionsincluding za sleeve .coaxial withathe drive shaft.

Y OSCAR QUIET.

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