US1252169A - Straw-sewing machine. - Google Patents

Description

R1 L. PLUMLEY,

STRAW SEWING MACHINE. APPLICATION FILED 1\Pn.|7.1915.

Patented 311.1; 1918.

2 SHEETS-SHEET I.

INVENTOR A'rronNzY R. L. PLUMLEY.

STRAW SEWING MACHINE.

APPLICATION mm APH. H. 19|5.

. Patented Jan. 1,1918.

2 SHEETS-SHEET 2 INVENTOR v/M .IP/R51 AT'I'CRNIY fin@ theh'fead Af ofthe frame-A are menne*v ed a verticali'rebipi'ocatingneedlibar`H and presser bar I. The needle bar mounted are clamped in split ear portions A2 and A2? and down movement by meansr-ofgas-yokelflff, adjustably clamped to the needle bar H between .the t bushings hf f andl JLG; andy Ylinks f D2 `connescjting thegyoke H :tofithe-.free-z endg-of thedewelreD The presser barxfI; vvhi'chcar.n riesfthefusual presser foot i at. its lower end, isheldfagainst rotative movement by. means .ofa-a crosshead or 4yoke member J `which is adjzustabliy clamped to -the- .bar Habove the r-amei head f A. J 5 represents the split clamping ears by Which thisadjustable connection of the'member A to the upper end of the needle .bar I is effected The member vJ comprises an arm J2 formed with a lpassage `vvay nearfits vfree end receiving. theupper endy of -thel bushing. h which is extended above the upper end of' the. frame head A fer .this purpose. To permit of the adjust.- Iment Eef ythe; bearing between; thev bushing h and the arm J 2,.:theflatte'rl iS- splitthebifurcations being-f connected by.` a :elamping. screw Jtl; f'lo insurethe exact adjustmentdesired a shimiJ :is interposedbetween the bifurcai .tionsl o fftheaarm J 2 `atene sidelof `the -bushinf'g h; Tliez'useof'fashim inla split bearing of this kind' permits of -a very easi'lyfmade .and accuratefadjustment.' As the parte Wear and the bifurcations of the .arm J2 need to be drawn closer. together .the shim :isVv removed andflled or ground awaya vtrifie andthen replaced.'` Should yawshim-be made too thin in-eifectingnany.adjustment of'this sort,v it is a simpler andfinexpensiveumatteri .to :replace the; th-in shim @With-1I a thicker one Byf proeeedingfin! this y:marinera'the bearing may be adljusted'ite the -exact size required r in iwhich lcase" f'iit is'a'neitheriatoo lo'ose lo-n'fhe; .one hand,

.l he presser ban l isz-very- :accu-1'at'elyAv fheld against rotation not onlylbeeausefothe tightglSSaQ-' the-bearing vorf the syoke yn iembelvn I' J -1 f en e the 4able distance between the presser bar and fbus'hir'i'gh. Giving to thadjustble eeniecy formedrby the clamping ears J the presser barm'ay*be2 raised and lowered with referenee'towyoke J and the mechanism engag- 'li'i'g'theltter as hereinafter exprllnetl; in ia As shown, the member J is provided With an extension J 5 at-therean side'o thepnessjer bar... `This. 'extension 51S; @HaagedL thef 11pper; side. by .thef bar spring; IQwhieh .tends to hol-d the presser.. foot. down ;against the `Work,

andhas its .tension adjusted bythe adjust stud A* carried bythe. frame A5 also en ages 2 .the under Side i olf.- fth'e Ilflelflfller.l JM@ lit the presser ect Whenjthe cam- :M isv normally rntated` units. bearing etudier this purr-Oseln .Certain -operitens periormed-withfsewing machines ofi this type, forf instance, in .fermiugffthe `usual-ff? button .attle center .ofthe croWnfo .afstraw hatyit isneeessary tolift thepresser footi Oiffromthe Work to permit the adjustment offthellatteronee for each; stitch taken My l presen-t. invention comprises .a nofvel form. ,of tipping mech.- anismr for automatically accomplishing Fthis .purpese .As show-r1., this.` mechanism; cem- .prsea a two armed.- ykwel?-;allembar? .fNf which cur-edito the framefe'f theffmachifne Kand is .axially gmovabletheren from the position shown fin full i lines ftQf'thef position shOW'Ilf lin dotted lines in fFigs. yAspringY arm passe ing through an apertureformed, in the lower .g v:f

arm N2 (see Fig. fa-Qt thelmernberfN, tends to hold-the :latter ill-whichever of its tatapositions it xisfmoved accordingly Tas the hump AOV sof. the.,-=: p'ring is airone side or jthe f other of the arm N2. The arm N of the niember'zN 'extends limiterthearm-.Jtv of theamem'ber J, and when the lever N is turned in a gvclqekidirectnma the g f crosshead J is engaged by the arm N.l and the resser bar ,and

presser foot-are thereby.lited. .,rlheqoscillatmg Ein@.ve-.ment ef the member; lN is brought about, When the member is adjusted :into Athe .fulltime apQSi/OIMQ Ag-gn thrQllgl blickengl-gement Alf.V the arm z :Nye-i leva reeiproeatng member; BsiAszShQwnM muy? engaged-(bm screw ,Pe .ad-jiusnably se @uredinlt 111g 1.22. picketing frfmene-Side .of theimember Rwhieh; has. an extensies-Bi loosely received; and 'sldngein .a ernespond.-

armi Nais fac? s needle lever.

in this mannerposs thing the velocity ofthe stud I)5 and consev quentlyofthe'memberh isyer'y *much"lower` than `the velocity `of the front end ofthe `'noise and weer. l. i

Coperetingv with theneedle carried by, l `the needle bar Hv and located beneath the o work bed or table ofthe machine may be any i euiteble Stitchk forming meclmnism,butin'-` `aSmuch`-jas the features' "of novelty claimedfl t y herein [do not pertain toI the character-'of ff this "stitchv forming nfiechnnism!'orl to (they.

f character ofgthework guiding mechanism j and work feeding mechanism'. collectively deeignatedy byv the ysymbols S yand Rl respecively,` no imore kspecific reference to v,thesf'e j parte of the Sewing machine disclosed need be l i lWhile` in, accordencey with theprovisione of vthe y :statutes have y illustrated and de y ribed the y-bes'tlform ofgmyfinventionnow n `urthermore,v the connection" y, of.. thetipping-mechanism to the rneedle lefver adjacent the pivotal support of the le l ver, vinstead of near` the -front end of the letter, permits v aI reduction in Weighty ofthe l leverespecielly at its front end and thus- `permits of fa Substantial `reduction 4in vthe inertia` ofl the lever.vr The vreduction in level- -inertie,` and"` the reduction of the velocity;y

` f of operation of the ftip ingmechanism both contributeto an evoi ance of vibration,

bar when oscillated.

leverzmonnted 'on said frame endedjustable .relative to said memberfinto 'and ont of a" position in which itis engagedyandoscil-f lated bySaid lmember as thelatter is recipro-v ceted, ndprovidedfwith an arm adapted to engage said .yoke endm'lift seid presser 3.111 a Sewingv machine,thefcombination l with the rframe and the 'oscillating needle le" ver pivotally connected thereto,of a

bar' mounted in seid frm'neya ytension device mounted'on seid Iframe, aftension releasir'l n t y device comprising e member havingone en x pivotally [connected to they said vlever edja-l centand above the pivotal axisfjofthe latter and .its yother 'endfinj guided relationf-with'` Seidj'fra'meWherebylsaid member islrecip 'i `cated 1in" the direction of its length by :oscillation of said leYery. a y,tippinglever"- monnted on said frame jandfexilly adjust able" in a directiontransyerse tothe linen movement Aof saidymernber }into,.a1d'y out o the position in. which said leverfis en and oscillated by said "member es thette reciprocatesand a 'yoke secured to;thehllpl'zuer` ,end-- of y ySaid presser `liar' and engaged by the` lever, and thereby oscillated as'said leveris oscillntedQp` f l i` 4.' vIn e Sewingtmnchi parallel to the needle bar, a yoke adjustably secured to the upper endof the presser bar and formed with la bearing slidingly receivs ing the projecting upper end of the bushing and mechanism adapted to engage said yoke and lift said presser bar. v

5. I n a sewing machine, the combination l j with the frame yand the needle bar mounted bar comprising a lever pivotally mounted iny said frame and having an arm adapted to engage `said yoke, and an operating connec-v V tion between said lever andthe needle lever.-

6, In a sewingmachine, the combination Copies of this'patentmsiyrbe obtained for vefeentsleach', addressing thegfGonimssionerrof liatents, l Y

' p c y Wash1ngton,D. GJ; II 4 with the framegamd the needle bar mounted therein, of a bush-ingA forming a bearing ,sleeve forthe latter mounted in'said frame and projecting abovethe` upper end of the latter, aA presser ,bar` mounted vin Asaid frame parallel to the needle bar, anda yoke secured to the upper end' of the presser b ar and formed with a bearing slidin lyrlreceiving the guiding shaft formed by. t upper end of saidfbushin'g.k 1

e vprojecting 7. A In a, sewing machine, the combination Y with the frame and theneedle'bar mounted there`1n Yof 'a y bushing formingla bearing sleevefforthe needle bar Vand mounted in said frame and projecting labove the upper endrof the latter, a presser bar mounted in said frame parallel to the needle bar, and a okey seeuredto` the upper endof the presser ar and formed with an adjustable split n lbearing, slidingly receiving they projecting j upper end of the bushing.

` 'RAYMOND L.k PLUMIEY.

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