US1469675A - Work-presenting mechanism for sewing machines - Google Patents

Description

H. (l. MOULTON WORK PRESENTING MECHANISM FOR vSIEWNG. MACHINES Filed Oct. 20, 1919 -4 Sheets-Sheet 1 Ila IOS

In 'en or. Harey C.Mou\ori Mdm H. 'Z3` MOULTON woRK PRESENHNG MECHANISM Fon SEWING MACHINES 4Filed oct. 2o, 1919 4 sheets-sheet 2 lnvenor.

Hurley C. Moulon -Y A'iys.

Get.A 2 1923. y H. C. MOULTON wonx PRESENTING MECHANISM FoR SEWING mwmrms` l 4 Sheets-Sheet 3 A ymad dat. 2o, 1919 -lnven'ror.

HcrrIe .by y

Q Moulon Oct. 2 1923.

H. C. MOULTON v woRK PRESENTING MECHANISM FOR SEWING MACHINES I 4 Sheets-Sheet 4.

y lFiled 0G12. 20, 1919 Fig. 4.

lnvenn 73 HorleyQM'ouTon 58 bylaw/MQ? Anya.

i ic

Patented Oct. 2, i 23.

AHARLEY-fc. livrountren,VV or ponen-ESTER: iirsssaorrusnr'rs, As'sIsNoR, BY, iunsiinf'ns- Applicatioaaiea oetober 2o,ni919. -seri1 iro. 532,525. l

T- aZZ (whom t mzlyconcem:

Be it known that', HARLEY C. MoULroN,

through vthe bed, standard" andk arm' acitizen of .the United States, 'andresident Vof Dorchester, county of fSuiiolk, State Vof .Massachusetts have invented an Improvement in VVork- Presenting Mechanisms '.for

Sewing-Machines,-ofwhich the following i description, "in connection with the accom- ;panying drawing, is a speciicatiomv like rcharacters on the" drawingrepresenting dike parts.

Vr"his invention:-relatesffto improvements lin Work presenting. mechanisms .for sewing v`machinesand Vthe object thereof `istoprovide a sewing machine. having an overhangarm: andv Ihead carryingY stitchforiningj mechanism and eedinfgniechanism with a )novel form. Vor Work support and bender mechanism adaptedgto `co-operate withfthe' feeding mechanism im-presenting the, Work 'to the lstitch formingmechanism.

f.- furthermobject of the` invention is to :provide a novel means .of adjustingfthe benderimechanism, the regulation of which may be accomplished -con -Veniently by the operator vfrom above. t-he .rbe d plate of .the machine :in which the adj usting, means .will

a be' out of the wayroi worlrlying. upon Athe bed plate of themafehine. .Morespecifically the invention includesa bender actuating lever having an.Y adjustable ulerum' by i means oi which v theielcho.f. movement of the bendervmay beadjustedjv v A 'further feature ot the invention con- .ists in providinganovel resilient `connectie-n 4between the vbender engaging arm vand thenieans oraetuating saidarm.

A' further object of ,the inventiongis to -provide a novel Iform of Work support which may -beadjusted .to-. position'the bender in' co-operative relationrto theneedle throat,

i vc uived oscillating needle 11V iixje'clly secured foot and stitch `forming mechanism.

Other objectsand vfeatures of the intention Willifnore yfully appear from the' tollowing` description andthe accompanying); drawings -1 and twill. befparticularly pointed oui-in the annexed claims. The preferred embodi nent of the invention -is disclosed herein as a-p'plied. t o a sewing f machine of the A-rbetter type-f for" felling a superimposed layer .upon a base layery of material but .it will be .underestood that the ini/ention,imay be v@embodied in other types of machines to Which it mfay' 'bei ap plicable. f

Fermi of the me'Che'Sm'slbeingshown iii velevation,

iever Shownin 'elevation, f

throng-h 'the Work support, and, 'lor adjusting the fulcru acti'iated through a pulley Which d 4is 4rot'atably mountedupon arfsleeve X'edl secured `to one endofvthe shaft,"thelpulley In 'y the drawings:

Fi'g. l isla vertical mediansectionalyiew sewing,l -ma'chinejembodyiig my'` inv'en ion,

ofthe sewingma'chine, I

Fig. B isan underneath plangviem 1 f Fig 2 an 'end 'elev'ation'o'f i "Fig, 5 'is av detail ltr'ans'yer actuating- 'lever, thielbed plate l preferably havingfafdjacent "o nejl eifid standard 3 Which'is integral arm d extending over' :the bed 'platef and haring at'its enda head' Which"contains'rsup- Fig. 4 is a detail Verticalsectionlal i5ie`ijv through the Work support, tliebed`p1g b .ingjbrolen 'away fand 'the "bender actuating.

i of the""be1ider ports the stitchj forming-mech'anisiland bearings in thearinai'id standardaiidfis any 7= being releasablyfclamped to the sleeifeby a nut' 9 having a millediiang'e' vl\11 LaJI' 1 s are; provided atY the @opposite -end'ojfjthe shaftf forv actuating the Vstitch forming .mechanism and the feeding mechanismg'f' The stitch formingv mechanism 'comprises a allyv mounted upon a "stud: 18 extending f across lthe rbifurcfated 4lovver end ofa bracket 14e Which isadjustably secured to the fl end of a needle-bar supporting' leve" which preferablyis ournalled at itsl upper end upon a Ytransmrse shaft'lextending across 'the headV of the 'inaehifrie,v preferably 'substantially inthe plane offthe" line 'ot stitching, whereby theleverfmayLbe'shogged lio Yconnected by a universal joint 17 tothe I lower' end or' a linlr 1S which is connected at its upper end by auniversal joint 19 to the .tree end of aneedle actuating lever 2O which is mounted rat its opposite end upon an adjustable pivot secured to the head of the machine. Y

As illustrated in the accompanying drawings `the end of the lever 2O is provided with a boss21'which is mounted on a pivot 22 having an eccentric stud 23 Vadjustably secured. by a set screw, in a boss projecting from the inner wail of the head of the ma chine. The needleactuating lever is connected intermediate of its ends to the upper endV of allinlr 24, the lower end of which is pivotally mounted upon a stud'25 having a stem 26 lixedly secured 'in the end or' the shaft 6 but eccentrically in respect t0 the axis thereof. Y

By reason of this construction rotation ot the main shaft causes an oscillation or' the vneedle actuating lever 2O about its pivotal support therebyvr reciprocating the link 18 and Oscillating the needle bar and needle in the usual manner.

By reason of the adjustment ofthe pivotal end of the needle actuating lever 2() the stitching point, or point of entry of the Vneedle into Ythe goods and point of emer- 'the lower portion oii the head or the machine. A boss 30 extending upwardly within the head of the machine serves also las a bearing 'for the shaft 28. rThe upper end of the shaft 28 is provided with a gear B1 which meshes with a gear 32 lixedly se- .cured upon the end ot the driving shaft.

'The relation of the gears 31 and 32 desirably aretwo to one so that .the revolving loop talferA or hook will malte two rotations to every reciprocation of the needle as is .usual in the Arbetter7 type of machines.l

ln order to set the stitch which is formed 'bytheco-operation oithejneedle and loop taker and Yto maintain proper timing rela tion between the parts, the taire-up Vdesirably .is driven from the same stud Yas that which actuates the needle mechanism. To this en'd the link 24 is provided with an offset extension 33 having at its end a stud 84 to which the take-up. actuating bar 35 is piv- V@tally/connected.

The bar 35 is siidabiy jouniauea in a Suitable ina block 36 which is pivotally mounted upon trunnions 37 in the arms of a bracket 38, the lower ends of which are secured to the upwardly projecting boss 30 in vtion of the stud 2.5, which is eccentrically oi the main Vshaft 6, will cause the operation or' the needle mechanism and also the take-upmechanism and that the movements of these mechanisms will be always maintained in proper timed relation.Y

Suitable means may brating the needle laterally to ormtwo parallel lines of stitching such are employed in telling, padding and overseamiing. 1n the construction illustrated in the accompanying drawings this is accomplished by means et a pitman comprising a rod 41 having a reduced extension 42 eX- tending through a suitable aperture in the needle bar supportingvlever 15, a spring 48 surrounding the extension 42 beingV clamped between the needle bar supporting lever 15 and a nut 44 0n saidrextension.

The pitman rod 41 is adjustably secured in the end of a member 45 havinf/` ways 46 and a cap 47 embracing a cam 48 upon a shaft 49 mounted transversely 4in the head 'of the machine, said shaft. being operated by a gear 50 ixedly secured upon the hub of the cam 48 Vand engaging a complementary gear 51 upon the end portion of the main shaft 6.

In the operation of the m'achinefthe gear 51 which is Vsecured'upon the shalt 6, et

be provided tor vi-V course, rotates in unison with. theV needle actuating mechanism and through the 'gear 50 actuates the cam-r46V to recign'ocateY the.. vpitman 41. The shoulder on the pitman 41 formed by the reduction required to provide the extension 42` abuts against the side of the needle bar supporting lever 15 andas the pitman is reciprocatedV in one direction serves to Atorce the needle Vbar actuatinglever laterally. As the pitman reciprocates in the opposite direction it reciprocates the needle bar actuating lever through the action of the nut 44 on the extension 42 lupon the spring 43. By adjusting the pitmanrod 41 in its socket in the member 45. the field oi cation of the pitman without actuating'theY needlebar supporting lever while, during" the reciprocation of the pitman in the other direction the extension. will. play. freelythrough the aperture in said lever;

Any suitable means may be providedfor locking the needle bar supporting lever. convenient means which is disclosed herein comprises a .set :screw 52'seated `inthe rtrgont wall of the'loweraportion'of .thehead ofthel sewing 4machine andfhaving its "end positioned to engage the side of a cross .head .on

the .needle barsupporting lever l5 which :is

chine is adapted to 'be operated. either-to form two parallel lines vof stitching-such as are employed in Ablind stitching or toaproduce straightaway blind stitching. f VThesewing` machineis providedwith a rigid presserfoot which is carried by the hook bracket'. 'The work is'presented to thefstitch `forming mechanism by -feeding mechanism which is carried by the headof the sewing machine and .operated by mechfanismrmountedin saidV head. l 1

The feed dog thus carried by the header Vwedge shaped adjusting member 72' 'being suitably secured in positionbyscrews't (.see

theH sewing. machine lco-operates `with a yieldablework support to advance the 'work for the successivevstitches. 'The base layer is presented in the'path of ythe needle bya bender which is thrust 'throughthework support a suliicient distance -to bend it up- 'wardly intoV the `path of 'thee-oscillating needle. Bygthus providing an upper feeding mechanism all the difficulty `which. herve-V toiore has been'fencountered jby reason of `the bender'interferingy with vthe proper feeding of the goods is eliminated.l y

The present applicationis addressed more particularly to the novel work supporting means and bender mechanism as will hereinafter more fully appear.

The work supportvcomprises a work supporting plate 53 which is ltixedly secured fit.

upon the upper end of va hollow stem 54:

Awhich is slid'ably mounted I-ina tubular standard 55 which is Xedly secured to an arm-'57 at the lower end of a bracket l58 which is secured to the `under-surfacev of the bed l by'sui't'able` screws 59, one of which passes through a slot 59X'in the bracket 58 thereby providing means 2for advjusting the tubular standard and Yconsequently the bender forward or backward in the line of stitchinggso that it may be properly positioned in Vrelationjtothe needle lorl different widths of needlethroat required for different kinds of work. guide, vembracingv said standard.7 which -is slidably mountedV in said bed to 'permitamovement of the standardl and bender tov adjusted' positions along the lineV ofz's'titching,v serves to prevent lateral vibration of said standard and the bender'which is supported by opposite guide slots 60 which receive' the -cylindrical ends of screws 61 which 'are seated in the 'wall of Ethe standard The work support 53 isnormally sustained in extended position 'to' co-operate with the arnesi-evs TheV hollow stem 5l is' Yprovidedwith f A 'yielding movement ofthe bender'when'an "obstruction 2 is encountered* kdaring its actua- :bears :npon' .the sunder. wall' :642 of .theqwork .Suipportl and at .its 'lower rendl fis, seated .fupon .av-bender':guidinggsupport.` 65 fwhiohfzis lcon-` fvfeniently secured` inzplaceby screwsfgihaving conical ends entering corresponding Asockets in the Walls .of thefsupportft.

The tubular. stand vr'55 isnormally heldnfin "rhs boss e8 is Aprovidedwith; gaat guidnelev'atedlpositionfbyf ai member GZwhichzris secured itofsaid tu'bular .membersandis vprovided with a hollow yboss .68 whichfreceives ,thefjupper tend of@ a1 helical; springt-69,"the lower 'end of which is seated .in aA socketfin VAanfadfjusting. screw' 702m the lower-:arm-57 sof .the `bracket 58.

ing' surface 71 which engages :anadjustable guideway preferably inthe form of a .wedge :shaped member 72 ftheinclined acefoif-fwhich engages the correspondingly linclined fifa'ce of the verticalfwall-of the bracket 58,'the

Fig. V5).

Means lare provided for depre'ssirig` the stand and workfsupport-to permitthe'intro- 90 1 duction and removal-ofthe work.;v Aflconvvenient 'mechanism ,for accomplishing this.

purpose comprises a lever 74 which oted at itsloute'r endupona stud Q75 secured 'to theV lbracket 58` andy rests upona rib :7-6` which entends transversely across the top-of `the Yboss i68. The-'opposite end'of the ile-ver 74 is engaged by the end of anyarm 5K7 eta.

rock-shaft 78 to which aV knee" lever 79-iSVv pivotallysecured; vSuitable *set screws "180 torY byf pressing the kneeupon the" lever? 579 ica-n depress the stand55 andfworkfsupport to 'any desired distancefor' fthe purpose vvor" introducingor -Temoving f lthe Ywork fronti stitching position f. 4 Thebendermechanismcompiises afbe'nder 82 preferably lhaving a 'lV-shaped work `en'- gaging end83 vand an enlarged Vstem f8ltralslot 86' through which toV receive the cylindrical endv ofy abender actuatir'iglarm '88 which is rotatably mou-ntedfupon a -rock "shaftf89-f l v `1 is Vvprovided with an extension l '-90 which extends parallel to and engages an f Var`n19l having aicollar rigidlyl'secured to the rck shaft 89. In order toprovideora tion vyieldable ineansare providedy for conico 1 :which reciprocably Vjournall'edin the y guidefb5. The-lower end of the benderk is connected tov a cross. head V85' having a 'cen'- meeting `:thefarnis9Of and Y' 91*together. A 'l convenient means `comprises a rod- "fi'a'edlyY vsecured tothe arm 90-and extendingthro'ughf an aperture in the arm 91 and provided with a helical spring 94 surrounding it which may be compressed to any desired amount by a nut 95 adjustably secured upon the rod 93. w

In order to prevent jumping of the bender and to take .up any wear which may occur "a rody 96 attached to the cross head 85 extends actuating arm 88 and the proper operation of the bender insured.

The rock shaft 89 is journalled insuitable bosses 100 and 101 extending downwardly from the lower face of the bed plate and is provided at its end with anrarm 102 which is connected by a universal joint 103 to the endV of a bender actuating lever 104 which has at its opposite end a fork 105 embracing the vbender actuating cam 106.

The bender actuating cam 106 issecured to the end of a vertical shaft 107 which journalled in suitable bearings 108 and Vv10.9 in the boss 2 which forms a part of the bed of.' the machine. Anarm 110 which is sef" cured to the upper end of the shaft 107 is connected by a link 111 to an arm 112 of a shaft 113 which is axially out of alinement Vwith the shaft 107 so that the rotation of the l shaft 113 will impart a variable rotative fmovement to the shaft 107. The shaft 113 is jour-nailed in suitable bearings in webs 114 and 115 extending aerossrthe standard 3 of the sewing' machine and 1s provided at its upper end ywith a mitre gear 116 which engages a complementary mitre gear 117 upon the main shaft ofthe machine. The gear 116 desirably is twice the diameter of the gear 117 thereby causing one reciprocation .of the bender upon every second rotation of inasmuch as Vthe needle is the main shaft. reciprocated upon every rotation of Y the main shaft the bender will be elevated upon alternate reciprocations of the needle, thereby providing means for presenting 'the base 1t will be understood however, that by substituting gears of equal diameter for the gears 116and 117 the bender may be causedV to reciprocate upon each revolution of the main shaft and consequently in unison with each oscillation of the needle. Thus the machinernay be adapted for padding or for straightaway stitching or for other purposes.

It will be noted that the variable movement imparted to the shaft 107 by reason of. the linkage between the shaft 113 and Ythe shaft 107'will cause the cam l106to have a movement which will produce a longer dwell in its action upon the: fork of theV bender Vactuating lever 105 than kshould be produced by the configuration of the cam itself. Thus the bender may be. given avery rapid reciprocation with prolonged periods of dwell at the time the needle-is entering and emerging from the work and Valso when the bender is depressed and thel accomplished. j

feeding operation being Thus interference with the freeA feeding movement kof the goods is avoided.

1t is desirable that means shall be provided for varying the amplitude of recipro-` cation of the bender to enable it properly to present work of different thickness to the needle. Thexpresent invention contemplates afnovel adjusting mechanism which will permit a very Vaccurate regulation of the field o f reciprocation of thev benderV and Ywhich will be so removed from the stitch forming mechanism as not to interferewith manipulation of Vthe work.. This is accomy plished by providing means` for adjusting the fulcrum of the bender actuating lever.

In the preferred construction illustrated in the accompanying drawings the bender actuating lever 104 is provided centrally Ywith a boss 118 provided with a journal which .is mounted upon a stud 119which projects eccentrically from theend "of a supporting shaft v120 which preferably is journalled in a split bearing 121 ina bracket 122 which is secured to the under' surface of the bed plate by screws 123. A collar 124 fixed to the upper end of the shaft 120'and Y resting upon the upperend of the bearing 121 serves to support the shaft 120, and nuts leo i 125 upon the end of the extension 119 to j support thebender actuating lever 104.

The collar 124 is provided with an arm 126 which projects through a slot 127 in the side of the boss 2 and ispprovided with a handle 128by means of which it may conveniently be adjusted. An index 129 secured tothe lower face ofV the lever 126Y and passing over a dial 130 on the bed plate serves to indicate the adjustment of the shaft which forms the fulcrum for the bender actuating lever 104. rlhe index 129 may i be provided with a projection 131 adapted to engage the serrated edge 132 of a plate 133 secured to the base plate or" the machine, the engagement betweenA the projection 131 and said serrated edge 132 serving; to retain' the lever 126 in adjusted position. Y

It will be apparent that by rotari'ly adjusting the shaft 120V in the manner above described the position of the stud 119 which forms the fulcrum of the bender actuating lever 104 may be varied, thus varying the position ofthe arm 102 of the rock shaft,Y thereby causing the bender actuating arm 88 to be raised or lowered as the case may be so that the field of reciprocation of the said hollow standard having'a cam engaging l said bender actuating lever and means for rotating said vertical shaft from said main shaft.V ,i y A A'12. In a sewing machine comprising a bed,

hollow vertical standard rising therefrom lcarrying an overhanging` arm and head, a

main shaft journalled in said arm, a lwork support and a bender reciprocably mounted Y alinement mounted in said hollow standard andbed, means for rotating the upper section of said vertical shaft from said main shaft, means connecting said shaft sections to impart a variable rotary movement to the lower section and a cam on said lower shaft engaging said bender actuating lever.

13. In a sewing machine comprising a bed, a work support having a standard extending through said bed and a bender reciprocably mounted in said standard, means Jfor actuating said bender including an oscillating rock shaft having an arm rigid therewith, a bender engaging lever rotatably mounted on said` rock shaft, resilient means connecting said arm and said lever capable of permitting a yielding movement therebetween when the bender is subjected to pressure in excess of a predetermined amount 14. In a sewing machine comprising a bed, a work support having a standard eX- tending through said bed and Ameans for depressing said standard, a bender reciprocably mounted in said standard, means `for actuating said bender including resilient means capable of permitting said bender to yield when subjected to pressure in excess of a predetermined amount and a spring connected to said bender acting to take up wear and to maintain the bender in proper operative position.

15. In a sewing machine comprising a bed, a work support having a tubular standard extending through said bed plate, yieldable means supporting said standard and means for depressing said standard, a bender having a crosshead reciprocably mounted in said standard, means tor actuating said bender including a yieldable arm engaging said cross head, a spring mounted in said standard connected to said cross head capable of yielding under the normal action of said bender actuating means and acting to take Yup Wear and maintain the bender in proper operative position.

16. In a sewing machine comprising a bed, a bracket depending'therefrom and a Work support having a standard slidably mounted in said work support and bracket; a member rigidly secured to said standard, a spring on said bracket supporting said member, mea-ns for depressing said member, a guide on vvsaid Abracketengaging said member and means for adgusting said guide.

17. In a sewing machine coniprisingla bed,

a'bracket depending theretromand a work support having standard slidably mounted in journals in said bracket;amemberVv tace engaging said member anda surfacev disposed in angular relation thereto engag-l ing said bracket withV means for securing said plate in adjusted position.

18. In a sewing machine comprising a bed, a tubular standard for a work support eX- tending through said bed, a Vwork support having a. hollow stem slidably mounted in the upper end of said standard, a bender guide in said standard, a spring seated on said bender guide yieldably supporting said work support, a bender reciprocably mounted in said bender guide and means for reciprocating said bender. p 19. In a. sewing machine comprising a bed, a tubular standard for a Work support eX- tending through said bed, a work support having a hollow stem slidably mounted in the upper end of said standard, a bender guide in said standardfa spring seated on said bender guide yieldably supporting said Work support, a. bender reciprocably mounted in said bender guide, means for actuating said bender, and a spring in the lower end of said standard normally acting to hold said bender in engagement with said bender actuating means.

20. In a sewing machine comprising a bed, a tubular standard for a work support eX- tending through said bed, a work support having` a hollow stemi slidably mounted in the upper end of said standard, a bender guide in said standard, a spring seated on said bender Vguide yieldably supporting said work support, a crosshea-d in said standard connected to said bender, means including an arm for reciprocating said crosshead and a spring connected to said crosshead located in the lower portion of said standard acting normally to hold saidcrosshead in engagement with the means.

21, In a sewing'machine comprising an overhanging arm and head, a curved oscil lating needle and complemental stitch forming mechanism-carried by said head, work carried by said head; a bender, means for actuating same to co-operateV with said needle and means for'adjusting said bender relatively to said stitch forming mechanism in the 'eneral direction of the line of feed.

23. n a sewing machine comprising a bed, an overhanging arm and head, a curved oscillating needle and complemented stitch forming mechanism carried by said head, a bracket depending from said bed, a bender carried by said bracket and means for adjusting said bracket to vary the position of 5 the bender relatively to the stitch forming mechanism'Va-nd means for actuating said bender. v Y

24. In a sewing machine @comprising a bed, an o-verhanging arm and head, a curved oscillating needle and complemental stitch bracket pivotally connect-ed to thefunder side pivot to vary the position of lthe benderjin *'20 forming mechanism carried byY said head,a, f

the general direction of the line of stitching l and means for actuating saidfbender.

Y In testimony whereof, I have signed my name to this specication.

HARLEY o. MoULToN.

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