US1435929A - Sewing machine - Google Patents

Description

I. KORNAS.

szwme MACHINE.

APPLICATION FILED AUG-2, 1920.

Lgfiflgg Emma NW, 211 11.922

3 shins-sum 1. N

3. KORNAS. SEWING MACHINE-' APPLICATION men nus-2, I920.

MW M m w P 94% M llllll Patented Nov. 21, 1922.

unirsn stares JOSEPH KORNAS, OF LINDEN, NEW JERSEY, ASSIGNORTO FELDIVIAN MACHINE WORKS,

INC., A CORPORATION OF NEW YORK.

, SEWING MACHINE.

Application filed August 2, 1920. Serial No. {100,635. b

To aZZ whom it concern:

I Be it known that I, JOSEPH KonNAs, a citizen of the United States, and resident of Linden, in the county. of Union and State of New Jersey, have invented certain new and useful Improvements in Sewing Machines, of which the following is a specification.

The invention relates in general to certain improvements in sewing machines of the type identified in the trade as wiring machines of the zigzag stitch commonly for use in forming diagonal or cross stitching.

The primary object-of the invention is to provide a simplified form of construction of such machines in which the number of parts heretofore found necessaryin similar machines have been reduced in number with incident economy in manufacturing cost.

Another object of the invention .is to provide such a construction in which compactness of parts have been featured, so as to reach ,into confined spaces in small sized hats, and other structures upon which it is desired to operate, and at the same time to provide in such limited ,constructions a rigidity andruggedness of parts to withstand the severe strains incidental to the use of such machines in factory Work where the machines are run at high speed.

It is understood that such machines nec-. essarily comprising a number of reciprocating parts. are apt to set up vibration and rattle especially when man high speed. This vibration tends in known forms of such machines to loosen and wear the parts all of which gives rise to an unpleasant noise! which makes such machinesunpopular with the operators. v,

\ccordingly, another object of the invention is to provide a type of machine of the class outlined in. whichmovable parts are nicely balanced, securely. journallcd to fix the.axisofrotation and inter-driven in a manner to minimize looseness of play and noise. 1

WVith this object in view the disclosure features a construction in which the rotat ing shafts are provided with long or spaced apart bearings; reciprocating members are closely guided in their movement and at the same time wearing surfaces have been mini mized as far as is practicable. I

Still another object of the invention is to provide. a form of construction in which necessary adjustment maybe made quickly,

.the invention will be'in part obvious from an inspectlon of the accompanying drawings and in part will be more fully set forth in the following particular description of one form of mechanism embodying my invention, and the invention also consists in certain new and novel features of construction and combination of parts hereinafter .set forth and claimed.

In the accompanying drawings.:

Figure 1 is a View in front elevation of a machine of the class described including preferred physical embodiments of the invention.

Figure 2 is a horizontal sectional View taken on the line 22 of Figure 1 and showing most of the novel elements of the ma- 1 chine in plan.

Figure 3 is a vertical sectional view taken axially of the main shaft and taken on the line 3-3 of Figure 2.

Figure 4 is an enlarged detail view in axial section of a part of the main shaft and taken on the line 4.--4 of Figure 5.

Figure 5 is .a transverse sectional view taken on the line 5--5 of Figure 4.

Figure 6 is an enlarged view partlyin section of the needle rocker bar frame adjustment taken on the line 6-6 of Figure 1.

In the following description and in the claims, parts will be identified by specific names for convenience of expression but they are intendedto be as generic in their application to similar parts as the art will permit. V

The device illustrated follows along somewhat conventional designs of the zigzag type of sewing machine now known and. includes a supporting base 10, frame 11, to gether with the usual arm 12, which supports the working parts of the machine. A. main shaft 13 is mounted in spaced apart bearings 14 and 15 constituting massive parts of the frame and is provided with the usual driving pulley 16,'eccentric 17, which, through the pitman 18, lever 19 and link 20 imparts to the needle bar 21, its vertical or substantially vertical reciprocation. The needle bar 21 is arranged to carry the needle 22 and is mounted to reciprocate in a substantially vertical direction in a needle bar frame; It is understood that; the needle bar hereinafter'n ore fully'described' The opposite end of'the link isj p'ivo'ted'bymeans of the pin and 'slotconnection 27 to the upperend of a vertically disposedlev'er 28 which lever'is fulcrumed intermediate its length on the 'pin 29 constituting aihori frame 23 mounted to oscillate in a plane parallel with the arm about pivot pin 24 defining a horizontal axis of swing of the frame is oscillated so that-the needle shall be directed first to one side and then the other side of its normal positionby' means of a link 25, one end of which is pivoted to the needle bar frame adjacent to its upper end through an' adjusting connection 26 zontallyf' projecting" extension from I the frame 11' of the machine.

" The main shaft, or at least) that aortion thereof wh'ich prbjeas through the caring "'15, is hollowed as shown in Figure 3 and a' relatively long solid looper shaft 30 is slidaloly mounted in the hollow portion and extends beyond the end thereofand beyond the forward face 81'of the bearing 15[ which extended portion is provided withthe usual looper 32 ,"dis'posed 'inthe usual operative relation to the needle. 7 The looper'sh'aft reciprocated axially in the. main shaft by thelever 28 which has a roller 33 pivoted to the lower end thereof (showniii Eigure 2) fitting,- in aperipheral groove 3 l'f'ormed ,in a split collar 35 slidah'ly,mountedon the" main shaft? The lever 28. is'provided intermediate its ends with' a pair of laterally extending parallelfl and vertically ;spaced apart bearing fianges 36 and"3 7 positioned on opposite sides of a cam suppo rting post '38 extending forwardly from 'thefi.am e ll A cam member 39 is rotatably mounted uponthe post 38 and is provided with a barrel, cam 40 which: engages between the lfiahges and rocksthe'lever as the carn 'inem- ,bei' is rotatedj-The'cam member is pro-.

vided with a relatively large gear ll which ,is disposed at right angles to and meshes fwithalgearltQ on the main shaftsoas to be driven thereby; The gears 41 v a'n'd lZ form aireducing gear train and to fe ature the desideratum' forsmooth runninggears the teeth of-the members are of the herring bone type,

' The collar 35 is pinned directly"tothe' 'looper shaft (Figure 5) by' means of a screw pin 43 which screw is passed through a slot 4% formed in theniain shaft. I

One of the features of this disclosure is to provide a broad bearing surface between the .sleeve and the driving shaft and for thispurposethe sh'aftis provided on oneside with a'fiat surface'45 and the sleeve 1 ispartially split in advanceoftheggro'ove ,to form a segmental-piece 4 6 with 'a flat surface engaging the flatjsurface on the main shaft so as to extend over a materialstructures.

area thereof. Thedsegmental: :piece is secured in position by'rneans' of set screws 47. It is understood that the fiat surface 4E5 extends len-gthwise lof -the ;Ir l ain .shaftsfor a distance to accommodate the sleeve in its limit'of movement in both directions under lthe r eciprocatory action of the lever 28.

The portion of the main shaftimmediately -in'-a'd'v'ance*of the flattened portion is provided with a relatively, short eccentric cam {8 for actuating a feeder reciprocating mechanism49 secured to the feeder 50 as is usual in such constructions. The length of th'e cam is limited to the width of; the arm "49"engaged thereby and is providedjon'its left side with a bearing-flange e8. ,A lscrew 50 is passedthrough the thick part of" the eccentric cam and intothe main shaft. so

as to transmit rotary movement"frondthe shaft to the cam. "The portion of theshaft' plate guideway 54 within which? is fittedthe body portion 55 of aneedle-'plateifid therear end er whichplate is provided with a depend-ingpin 57' designed-to engage in the groove 58 formed on the sleeve '52. "The forward end of the needle plate is provided with an'upwardly extending projectionfiil.

provided with a needle) receiving hole-"60. The needl Plate is demountably held in position by meansof a- 'work'plate 6l-fastened tothe bearing '15 by' ineans of locating pins 62 anda set screw-'engaging' the screw hole 63.'The work plate extends'forwardly ofthe bearing *15 so asto overlap the feeder and looper as'is usual in such Thework plate constitutes a means for'securing'the needleplate in position in its guideway 54. The" work plate is'provided with two slots-or rather with an' l.. shaped' opening 64 inone slotted portion* 65, of which the projectioir'tgfrom the needle plate/is" designed to reciprocate and to be guided substantially free of vibratory movement. The other slotted portion 6.6 is designed to contain the feeder 50" which likewise is mounted for reciproeatory movement transversely of the length of the main shaft and designed likewise tobeheld against vibratory movement while f free to reciprocate in its usual functional manner.

'VVith reference: to the adjusting connection 26 (Fig.- 6), an-eccentric pin amonnecjts the link 25' with" the rocking needle vbar frame. The pin is provided-with a spherical head 68 and socket 69" formed' partly in the front face of the link 25 and erations of zig-zag stitching machines of the type disclosed, in which a long dwell follows each lift of the needle and the looper, together with the needle plate, is shifted with the shifting of the needle. In the present disclosure power is taken off the main shaft through the reduced gear connection to re--.

ciprocate the upstanding lever, the upper .end of which lever is connected directly to the rocking needle bar frame and the lower end of-the lever is connected through the sliding collar with the looper bar. It is appreciated that in this way the looper shaft and the rocker arm reciprocate in synchronism. Power is transmitted directly from the main shaft to the looper bar housed therein through the broad bearing connection provided by the split sleeve 35 so that the looper shaft is both reciprocated and rotated through the agency of this sleeve. As the looper shaft is contained within the maindriving shaft a long bearing is provided therefor thus tending to minimize relativevibratory movement and the compact construction resulting therefore permits of the use of a relatively narrow work plate.

The parts on the main shaft between the long bearings 14 and 15 so apportioned among the parts taking power off of the shaft that all of this space is completely utilized thus tending to reduce the length of the machine as a whole and to take power off of the shaft at points most conveniently available to the parts actuated therefrom.

lVhile I have shown and described, and have pointed out in the annexed claims, certain novel features of my invention, it will be understood that various omissions, substitutions and changes in the form and details of the device illustrated and in its op eration may be made by those skilled in the art without departing from the spirit of the invention.

Having claim 1. In a sewing machine of the zigzag type, the combination of a main shaft, a .looper shaft slidably journalled therein and having an engagement with the main shaft whereby it is rotated therewith and is free to move longitudinally with respect thereto, an upstanding lever fulcrumed intermedithus described my invention, 1

ate its ends, a needle bar frame pivoted to rock about a horizontal axis and thus cause a needle bar and needle carried thereby to trace a zigzag stitch, a link connection be tween the upper end of the lever and said needle bar frame, a cam driven from the main shaft and connected to said lever intermediate its ends to rock the same, and means connecting the lower end of the lever with the looper shaft to reciprotate the same longitudinally as it is rotated directly by the main shaft.

2. In a sewing machine of the zi zag type, the combination of a main shaft, a looper shaft slidably journalled therein and having an engagei'nent with the main shaft whereby it is rotated therewith and is free to move longitudinally with respect thereto, an upstanding lever fulcrurned intermediate its ends, a needle bar frame pivoted to rock about a horizontal axis and thus cause a needle bar and needle carried thereby to trace a zigzag stitch, a link connection between the upper end of the lever and said needle bar frame, a cam engaging the lever to rock the same, a reducing gear connection between the cam and the main shaft and means connecting the lower end of the lever with the looper shaft to reciprocate the same longitiulinally it is rotated directly by the main shaft.

3. in a sewing machine of the zigzag type, the combination of a main shaft, a looper shaft slidably journalled therein and having an enggement with the main shaft whereby it is rotated therewith and is free to move longitudinally with respect thereto, an up standing lever fulcrumed intermediate its ends, a needle bar frame pivoted to rock about a horizontal axis and thus cause a needle bar and needle carried thereby to trace a zigzag stitch, a link connection between the upper end of the lever and said needle bar frame, a cam driven from the main shaft and connected to said lever intermediate its ends to rock the same, means connecting the lower end of the lever with the looper shaft to reciprocate the same longitudinally as it is rotated directly by the main shaft and a needle plate mounted for reciprocatory movement with the needle bar frame and operatively connected with the looper shaft to move therewith.

4-. In a sewing nnichine of'the zigzag type, the combination with a support and mechanism mounted for reciprocatorv movement, of a main shaft iournalled in said support and providing a suoport for the reciprocating mechanism, a gear on said shaft, a lever provided with a ram engrging extension projecting laterally of its fulcrum, a cam member geared to the main shaft gear and engaging said extension to rock the lever and means including a split sleeve slidably mounted on the main shaft, pinned to the same to turn therewithand provided with a 1 peripheral groove for receivingone end of the lever and connecting the lever with said reciprocatory mechanism on the main shaft to cause the same to function.

5. In a sewing machine of the zigzag type,

the combination of a main shaft, a looper" shaft slidably mounted therein and, c'onnected to rotate therewith, apower pulley fixed to said shaft, a cam controlled lever, a gear on said shaft, a needle bar frame op- F eratively connected to be rocked from said" lever, a collar slidably mounted on the main" shaft actuated by said lever and operatively connected to the looper shaft to reciprocate the same, a feeder actuating cam on said main shaft, a'needle plate actuating cam slidably mounted on said mainshaft and a pin passing through the main shaft and connectingthe cam with the looper shaft to reciprocate therewith. v

6. In a sewing machine of the zigzag type, the combination of a main shaft, means for rotating the shaft, a looper shaft slidably mountedin the main shaft and. having a long bearing therein, mechanism for reciprocat ingthe looper shaft from the rotary movemovement, apart of said main shaft pro-' surface, a split sleeve slidably the main shaft and including ment of the main shaft said mechanism including a yoke collar slidably mounted on the main shaft, a lever pivoted intermediate 3 its length and with one end engaged in the collar to reciprocate the same, means for fixing the collar to the looper shaft, means for driving the collar from the main shatt, a

gear on the main shaft and a cam driven from said gear and operatwely connected to the lever to reciprocate the same.

7. In a sewing machine of the zigzag type, the combination of a main shaft, means for rotating the shaft, a looper shaft slidably mounted in the main shaft and having a long bearing therein, mechanism for recipro rating the looper shaft from the rotary movement of the main shaft, said mechanism including a yoke collar slidably mounted on the main shaft, and having a. 1'ieripheral, groove. a lever engaging in said groove to reciprocate the collar, a cam' controlled -Ineans driven from the main shaft and opv idecl on the outer side thereof with a flat mounted on a segmental part with a flat face engaging the flat sur face on the shaft thereby to provide a broad bearing between the sleeve and shaft to nect-ed looper shaft.

main shaft to transmit the rotary-movement I of the shaft to the sleeve-,theflat contacting main shaft connected to thelcopenslfaft 'and y transmit rotary torque' from one to the other, means connecting the sleeve withthe looper shaft 1 and means driven from the main shaft for reciprocating said I sleeve and its con- 9. In a sewing machineof the zigzag-type, thecombination: of a main sh'aft p-rovided with a longitudinally extending slot; a looper shaft mounted in the mainshaft for relative longitudinal movement, awokesleeve slidably mounted on the main -fishaft and splitalong aplane offset from-its axes of rotation, means passing through the slot for connecting the sleeve and looper shafta-th ereby to reciprocate the-looper shaft from-tite sleeve, means for reciprocating the 'yoke sleeve, and said sleeve and: shafthaving a flat contacting portion providing a broad bearing connection between thesleeve-and portion between the sleeve" and: main shaft being offset from the split betweenthe parts of the yoke sleeve.

10; In a sewing machine of thewzigzagwo type, thecombination of a 'main 'sh aftg a looper shaftjournalled therein for relative "longitudinal movement, means including a sleeve slidably mounted on thefmain sliaft, directly rotated 1 thereby and pinned te t-herlooper shaft for reciproc'ating the looper shaft fromthe main-shaft, .a-'-"needle--'plate' mounted for reciprocatory movement, apl ate control-ling sleeve slidably mounted "on the to the needle plate to cause the needleplatc" to reciprocate with and by the 100136 1" shaft! 11. In a device of the-class -desc'ribed-, 'the* combination of a frame, a main shaft-jour-' nalled in the frame, a looper shaft having long bearing inthe main shaftg -means for rotating the main shaft, arota-ry-' driving; connection between the mainslfa'ft' and= thej contained looper shaft, means-driven from the main shaft for reciprocating-' the loo er shaft and aneedle plate mounted for recip ro'catory movement and connecting? *meansf passing through the mainshaft for a'ctuat ing the needle plate fromtheloopen-shaft.

12. In a device ofthe class described, the

combination of a frame, a main sh aft journailed in the frame, a loopershaft having a long bearing in the mainshaft, means for rotating the main shaft, a rotary-driving connection'betweenthe main shaft and the contained looper shaft, means driven from on the main shaft between said reciprocating needle plate connectingmetrns and the looper shaft reciprocating'means, I

13. In a device of the class described, the combination of a support provided with a needle plate guideway, a needle plate'slidably mounted in said guideway and provided with an extension having a needle receiving hole therein, a work plate positioned on said support and acting to secure the needle plate in the guideway, said work plate pro vided With a slot for receiving said extension from the needle plate, a main shaft journalled in the support, a looper shaft journalled in the main shaft, a looper carried by the looper shaft below the work plate and means for reciprocating the needle plate from the loopershaft.

14. In a device of the class described, the combination of a support provided with a needle plate guideway, a needle plate slidably mounted in said guideway and provided with an exiension h aving a needle re ceiving hole therein, a work plate positioned on said support and acting to secure the needle plate in the guideway, said work plate provided with a slot for receiving said extension from the needle plate, a main shaft journalled in the support, a looper shaft journalled in the main shaft, a looper car ried by the looper shaft below the work plate, means for reciprocating the needle plate from the looper shaft, said work plate als provided with a feeder slot, a feeder mounted to reciprocate in said feeder slot and means for actuating the feeder.

Signed at New York city, in the county of New York and State of New York, this 26th day of July, A. D. 1920.

JOSEPH KORNAS.

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