US746303A - Blindstitching attachment for sewing-machines. - Google Patents

Description

' PATENTED mac. 8,1903.

B. DONALDSONU BLINDSTITGHING; ATTACHMENT FOR SEWING MAEHINES.

APPLICATION FILED we. 12. 1902.

's SHEETS-SHEET 1.

NO MODEL.

TH: NORRIS PETERS 0, vno'rouwo. WASNlNGTON.-D- c.

PATBNTED BBQ-8, 190s.

' E. DONALDSON. BLINDSTITGHING ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED AUG. 12, 1902.

3 SHEETS-SHEET 2.

H0 MODEL.

PATENTED DEC. a, 1903,

E. DONALDSON.

BLINDSTITGfiING ATTACHMENT FOR SEWIN G MACHINES.

' APPL'IOATION FILED MIN}. 12. 1902.

3 SHEETS-SHEET 3 N0 MODEL.

$54 Shiva 1cm x we Moms PETERS 00., Pum'ammv msumsim, u. c

'No. 746,303. Patented December 8,1903.

EDWIN nountnsou, or 533mm, NEW YoRK Assienon' OF ONE-FIFTH "r DANIEL T. WORDEN, on NEW YORK, N. Y.

B'LFINDSTITCHVING ATTAC-ILIM EHNT FQRFSEWVIFNFG-MACHINFES.

SPECIFICATION forming of Letters Patent No. 746,303, dated December 8, 1903;

' Applicationfiled'hngust12,1902. Serial K031191373. (N0 model-l M? -WWW?! wns: E1 6:1 re i y d d? Th si e nsjb co p i Be itknown th t1, EDWINDONALDSQN, a the attachment to a fixedpart of the sewingcitizen of ,the United S,tates,.and a resident of machine is advantageous, inasmuchas it perg the borough of Brooklyn, 'city of New-York, mits of theattachrnent being first placed in 5 county of Kings, and State of New Yorkghave; any position most .conven'ent for the'accom invented certain new-andj, useful Improveplishnnent of the coupling and" thereafter ;ments in Sewing-MachineAttachments for; swung around ho 'zontallyjintoits final loca- .Blindstitching pf lwhich; the; following is a tion, in which the thumb-screw -C, passing specification,reference being had to the ac-- through thefpel'foration 6, Fig. 4, ilk-1119 base 1o companying-drawings,- in which- I 1A, is brought to register with asuitably- Figure 1 isa side-elevationof my attach- ,threaded perforationinthe bed-plate B of the ment with itsaccessories; Fig. 2,."ajside view machine and the attachment securedinits of front part of the attachment", showing cer-. .fixedgand final positionby turning the said tain parts in 'section, taken on the line a: a of thumb-screw downtoplace.

. 5 15 Fig. 4: and seen in the direction eithefarrow- The fabrics to be sewed are while under nearest that line. Fig. Sis a detail,;being a suitable tension, hereinafter described, fed, plan viewofcertai'n parts;..-Fig. 4,"a plan or presented to, and moved laterally relatively topview of the attachment and itsaccessories to. the needle Z and to the'direction of the generally; Fig.5, an enlarged sectionalview feed by the rotating and oscillating arbor D. 2010f thearbor and itsspurs; @Fig. 6, a detail eley Said arbor is provided with a plurality of re.- vation of certain parts; Fig.7, a detail showdially-disposed, spurs d d. The central axis ing lever N and connections from opposite of each spur should avoid pitch oran'gle relaside to that shown in Figs. 1 and 2; Fig. 8, a tively to theradius of a cross-section'of the detail side view bfthread-controlling device; .arbor, and the exterior of. the spur is pref z 5 Fig. 9, adetail sectionalview of certain-parts; .erably' coneqshaped. Said spurs engage and Fig. 1Q, a perspectivei view, of parts of the control'the fab cs not only for.the purpose arbor and mandrel showfing position of the of 'feedingthe' same, but also duringthe lat-- fabric asapplied.theretoduring operation of oral or transverse movementsimpartedtherethe attachment. 1. F to by the oscillation of the arbor. 1 It should 8c 0 Similar characters refer to similar parts. also be noted that three of said spurs equidis- A is the base;of,the attachment, to which tantly disposed on the same cross-section of I are secured directly or medially the other the arbor, as shown in Fig. 5, are suflicient parts of the device and which is itself movfor-thepurposesrequired of them and give ably secured to the bed or work plate B of the best results. The arbor D :is also pro- 8 5 the machine by thumb-screw Qand also by vided with.two circuml'erentiallydisposed rethe following-describedmeans,;viz A lug or cesses d, d for the accommodation of the post a, having a vertically disposed cylin-r needle I r I 7 drical recess, is secured to the base of the at-. 1 The anbor D- issupported and actuated as g. tachment. (See Fig. 6.); Withinthisrecess. I follows A plateE, normally inclined during 40 and adapted to be moved vertically therein the operation of the attachment'to the plane of F .is a cylindrical extension or pin 0/, (indicated the base A, (see Figs. 1 and 2,)ishi'nged tothe by dotted lines lll'Flg. 6,)'attached to and latterbymeans ofa shaftF,journaled-in l ugs projecting from a coupler-piece a, Fig. 6, the, ac on said plate and in lugs a a, securedto upper part of -which contains a cavity or 1'6 the base A. w- The plate E is movablyl held. in 9 5 cess fitted to and adapted to. receive the its normally inclined position by the stress of l w-presser-foot bar a of the sewing machine, a spring f, helixed around shaft E-and haV- I (the presser-foot being removed; see, Fig. 6,") ing one of its-extremities insertedgin; an eye he said, bar and coupler-piece being secured .f secured to base-A, and the other in anfiye together when the attachment hasheenad fflsecured to plate E; (see Fig.2.) x

5- vjusted to the required position by-means of G G are apair of vibrating arms; each pivthe presser-foot thumb-screw a, as will be otally connected at one of its extremitieaas hereinafter more fully described, with the plate E and each provided at its opposite extremity with an extension g g, pivotally secured thereto and carryingjournaled therein reduced or circumferentially-recessed portions of the arbor D, said portions being shown by the dotted lines in Figs. 3 and 4:. G is pivotally secured to the plate E by the screw g The arm G is adjustably secured to the plate E, as follows: The inner extremity of arm G is pivotally secured to one arm of a bell-crank lever H. H is by means of the screw 7t pivotally mounted upon a post (not shown in the drawings) secured to and rising from the plate E. To the opposite arm of H is secured a downwardly-extending post h To the post h is secured one extremity of a rod h Said rod it is supported near its opposite extremity by passing through a retaining piece or collar 72 Fig. 4, secured to plate E, and within which retaining piece or collar the rod 72, is loosely journaled. This end of 72. extends beyond the collar 77, into a slot or recess in plate E and is threaded. The threaded portionof 72 within the said recess coacts with a correspondingly-threaded knurl-nut 72, which turns upon said rod it within the said recess. By turning the nut h rod h is moved relatively to plate E, the bell-crank lever H is correspondingly actuated, also the arm G, and the arbor -D thus caused to change as required its position relatively to the needle.

The knurl-nuth is provided on its outer face with a plurality of small circular depressions 77. 72 ,annularlydisposed. Adetent-springand h is secured to the plate E by a screw 72. A pin 71*, secured in plate E, presses the extremity of said spring normally into contact with the face of the nut 72 and causes the end of 'the spring to enter in turn as knurl-nut 72,

the said circular depressions 77. h, whereby the knurl-nut 72 is locked against movement under ordinary pressures and the rod h and its connected parts held at the required adjustment.

6 Fig. 4, is a guide-plate secured to the plate E, as shown, and having at both extremities elevated extensions overlying the arms G G, which vibrate underneath the same and are thereby held down against upward displacement. The arbor D is provided at one end with a geared extension d Ashaft M is journaled in lugs mm, secured to and projecting upwardly from the plate E. m is a geared portion of shaft M, superimposed over and intermeshing with the geared extension 01 of the arbor D. m is a trundle-wheel secured to shaft M and provided with a plurality of projecting arms (in the present instance six) 8 s, &c. Rotary motion is communicated to the said trundlewheel m shaft M, and so to arbor D, as follows: Rock-shaft K is journaled in lug k and in post 70, secured to and rising from the base A of the attachment. To the upper end of post k is pivotally secured a two-armed lever directions.

N, so disposed that its superior arm projects, as shown in Figs. 1 and 2, over the set-screw 0 of the needle-bar 0 of the sewing-machine, the said set-screw being sufficiently extended to insure when the needle rises its engagement against the one side of said superior arm of lever N, whereby said lever is caused to rock upward. Said superior arm of lever N is maintained in normally depressed position by the spring a, bearing at one extremity against the top thereof and near its other end loosely helixed around rock-shaft K and hearing at its opposite extremity against base A. (See Fig. 4.) i The inferior. arm of lever N is forked, as shown by dotted lines in Figs. 2 and '7. Fixedly secured to one end of said rock-shaft K is an upwardly-projected lever 10 (See Figs. 2 and 7, Fig. 7 being an elevation of the parts in question as seen from the section taken on the dotted line y y of Fig. 4 looking in the direction of the arrow marked 8'.) A horizontally-projecting pin is secured to'lever k and engages with the bifurcation of the inferior arm of the lever N. When the superior arm of the lever N is raised by the needle-bar, lever 10 is consequently caused to rock in one direction and in the opposite direction by the return of lever N to normal position under stress of spring at. The extent of rock movement imparted as aforesaid to lever 70 is limited by projections or studs 70 7.0 secured thereto and which in turn engage against baseA and respectively check its movement in opposite To the opposite end of rock-shaft K is rigidly secured an upwardly-projecting arm or lever it, to the upper extremity of which is pivotally secured a pawl 19, maintained in normally depressed position by spring 19, secured to said pawl and to a projection p on arm is and restrained against undue depression by engagement of a rearward projection 19 against a stud 70 on the arm 76 The pawlp is provided with a pin 19 which contacts intermittently with the rim of the trundle-wheel m and prevents the pawl from dropping too far between the arms 3 s. It will be understood from the foregoing that at each inward movement of rockshaft K the pawlp is caused to engage against one of the arms 8 s and to turn the trundlewheel m together with shaft M and also the arbor D, onesixth of a revolution, the arbor being turned in the opposite direction to the shaft M, shaft-M turning in the direction of the arrow shown in Fig. 1 andarborD in the direction' of the arrow shown in Fig. 2.

Trundlewheel m is prevented from overrunning by a detent m loosely pivoted to a post of, secured to the incline plate E. A spring m", secured to plate E, presses against one side of detent m to cause it constantly to press against arms 8 s of trundle-wheel m and the edge of the detent contacting with said arms is so curved and shaped, as shown in the drawings, as not only to facilitate the arms passing over or by such edge, but also so as to prevent after one arm has once passed it its return in the opposite direction, the detent thus serving not only as a yielding but also as'a positive brake upon the trundlewheel m r The required oscillation is imparted to arbor D as follows: A vibrating arm' G is pivotally secured to the inclined plate E by a screw 9 The opposite end of arm G? is bifurcated, each bifurcation being provided with an-upwardly-extendiug horizontally-rd tating cam-roller g g", (indicated by dotted" lines in Figs. 3 and 4,) one, of them, g shown in section in- Fig. land in side elevation in Fig: 1. The vibrating arms .G G are conheated by a link 9 pivotally secured to arm G and adjustably to arm G2 by screw 9 passing through said link, through slot 9 in arm G and coacting with a plate or nut g provided with a correspondingly-threaded aperture to receive said screw and underlying arm Gr within a recess 'in plate E. (See Fig. 4.) By this means, as will be readily understood, the connection between G and G may be somewhat extended or shortened at will and the extent of transverse throw or oscillation ofarbor D correspondingly regulated:

Rigidly secured to shaft M and rotating between the cam-rollers g g is'a cam-wheel Q, having two cam-faces, each respectively bearing against one of the said cam-rollers.

These cam-faces are computed and shaped'so as to impart to the arbor D, through the connectin g means before described,'one complete i of the needle.

movement in the line of oscillation in one direction at one rise of the needle-bar and in the opposite direction on the next successive rise of said needle-bar, andso on indefinitely.

Special thread-controlling means are provided. The rotation and oscillation of arbor D, carrying with it the fabrics, would otherwise carry the thread with it between the eye of the needle and the last stitch backward and forward in directions angular to the vertical line of the needle. control the thread and keep it as closely as possible to the fabric during the upward rise A slightly-vibrating arm R is loosely secured by screw 4' to side of post or stationary part a. One end of said arm R is provided with an aperture or eye r, normally disposed so as to be entered and passed through by the needle on latters descent. Arm R is maintained movably in its normal upwardly-rocked position (shown in Fig. 8) by a spiral spring rfihoused in post a and indicated by dotted lines in Figs. 4 and 8, said spring r pressing against a lug 4", projecting transversely from a rearward extension of arm R-'- Vibration of-arm R down wardly is limited by engagement of lug r against the rear of post a. Vibration of arm R upwardly is limited by engagement with rear of post a of another lug, r projecting transversely from a downward extension of arm R. The needle on descending enters eye r of arm R, carrying with it the thread, and

It is desirable tovibrates arm R downward -in'to the'position shown in Figs. 1 and 2-. After-the fabrics have been split bythe needle and the stitch formed the needle rises out of eye r, spring r causes arm R to vibrate upwardly into the position shown inFig. 8, and the simultaneous oscillation of arbor D carrying with it the fabrics and the last stitch therein secured laterally and transverselyof the vertical'line of the needle, the thread is, nevertheless, by

reason of its engagement against the side of eye 0" maintained at a more acute angle than wouldoccur were it not for the interposition of the thread-controlling arm R, and there is thus secured a condition and control of the thread of important advantage. In Fig. 6is illustrated the operation ofthe devices in the particulars last mentioned, the thread 6 being shown held as described, while arbor D (fragment of which is indicated in the drawing by dotted lines) is moving in the rotary and oscillatory directions respectively indi-' cated by the arrows. Means are also provided for raising the inclined plate E-to a horizontal position to facilitate the presentation and application of the fabrics to the arbor D. A lug 1*, (shown in section in Fig. 9 and by dotted lines in Fig. 41,) downwardly projecting from one side of inclined plate E, is movablysecured by pivot l to a lever'T,

provided with a rearward extensiont and a convenient finger-piece E. On raising lever T projection t'presses against the top of base A and as the lever is rotated 'upwardcause's too Y theinclinedplate E to riseto horizontal po- I sition.

Many articles of fabrics adapted to be stitched bythe use of my attachment are tubular-as, forinstanee, particularly,trouserslegs, the lower edges of which are required" to be inwardly folded and seamed 'on the in so that the stitches shall not appear on the outside. In Fig. 10 isillustrated the lower partof a trousers-leg J ,the remainder of the trousers being brokenjaway and the lower,

part of the fabric J "being, as shown, folded over to constitute the bottom plait or hem. Means are provided for facilitating thepresentation and application of such articles to side of the log by so-called blindstitching,

jecting flanges'a a a a Fitting between said flanges and resting upon the said rearward extension of baseAand secured rigidly thereto by screw Z is a rearwardly-extending supplementary plate or'base L, provided with a slot Z.; To the rear of supplementary plate L is movablysecureda movable base LV-by means of headed screw v passing loosely through slot Z and through base V and 00- operating with thumb-unto" to clamp the parts together, thus providing for the adj ustment and securing of base V at such point on plate L as may be required. Base Vis' provided on each side with downwardly-projecting flanges 41 bearingagainst the sides of plate L, and by which base V is guided in its movements relatively to plate L and rotary movement around screwv is prevented. The movable base V is provided with two upwardly-projecting lugs 12 Within suitable journals in thesev lugs v v is rotatively secured an axle o, to which axle is. rigidly secured an upwardly-extending arm 0 To upper end of arm 2: is rigidlysecured a sleeve 1 Supported and rotatingwithin said sleeve and projecting from each end thereof is an axle-rod 1%, upon one projecting end of which rotates a mandrel o sleeved thereon, and on the other end a handle o A spring 42 helixed around axle v and pressing at one of its extremities against upwardly-extending arm 12 and at the other against base V, as shown in Fig. 1 partly in dotted lines, opcrates constantly to press backward away from the attachment the arm n and mandrel '0 connected therewith, as aforesaid. A backwardly-extendiug projection or lug v rigidly secured to arm '0 limits the-backward movement of the latter under stress of: spring 0 by hearing against base V when arm 0 is forced backward sufficiently for that to occur. tremities to the axle-rod '0 and at the other end is adjustably connected with a, rod 4), which latter rod is pivotally secured ato to an upwardly-projecting arm of the lever T.

The adjustable connection between the rods 11 and 2: is efiected by headed screws 4;" and v in the former, the shanks of. which screws pass through an extended slot '0 in the latter and which when screwed tightly in place clamp the rods 11 and 0 together and when loosened permit them to be moved relatively to each other and their combined length extended or shortened,.as will be readily understood.

The operation of the devicesdescribed is as.

follows: The attachment having been. secured in the required position to the bedplate of the machine, as before described, the fabrics to be stitched (taking for illustration the lower part of a trousers-leg to be seamed, as before described) are first folded, as re.- quired-forinstance, as at J in Fig. 10. The inclined plate E is brought into horizontal position, as before described, thus liftingarbor D conveniently for the application thereto of the goods. the arbor D into the end of the trousers-leg and so that the fabric is bent over the arbor, as shown in Fig. 10. The operator next presses forward the mandrel n against stress of spring 0 toward the needle until the mandrel is brought into a position such as to enable it to be inserted conveniently into the opposite side of the end of the trousers-leg, as shown in Figs. 1 and 10. On the operators releasing the mandrel '0 the stress of spring 12 will force the mandrel backward toward normal position as far as thefabric will permit, as shown, for instance,in Fig. 1,

A rod 12 is secured at one of its ex The operator next inserts and. the goods are thus subjected to and:au.- tomatically held at the required tension. forstitching- The sewing-machine is thenset in motion, the. needle. descending passing through the fabric by splitting it without passing completely through. to. the. opposite side thereof. The threadas the. needlerises: forms temporarily a loop below the perforation of the fabric, through which another thread is passed, as by a shuttle or inrany convenient manner. As the needle risesrthe. set-screw or other projection of. theneedlebar engages with the. lever N,andther.eby causes, as before described, the. arbor" D not only to rotate one-sixth of arevolution, but; also and simultaneously to. oscillate intone direction, the spurs d d' engaging with, the: fabric, and the fabric is thus. fed forward around the arbor, the rotationofi mandrel 41 enabling the fabric to accommodateitself. readily to its new position,.an.d. the-fabric is also simultaneously carried sidewise on trans-- versely relatively to the. feed thefoscillas tion-of the arbor D. W hen.the. needlenextdescends, it punctures the; fabrics,,as.bofore,.. butzin a new placein advance. of thepnevious stitch and. located. diagonally thereto when viewed in relation. to. the. generalidirectionof theseam or feed; The continuedloperationr of the machine. repeats the; results described; indefinitely or until. the same is; finished, a. zigzag line, of stitches being.produced,.as: shownin Fig. 10, the needlesth readbeing rep resented. by t t and. the. under thread. by Afterv the seam. isfinished. thetgoodsare-re: moved from the .attachment,. as followsa. The. operator first. pushes fonwards toward. the needle the mandrel/21 W He. then pulls-the mandrel backward, which. Iattewbeingconnected, as aforesaid;. with the; leversT raisest the plate E to horizontalpositionandelevates. the arbor D,- sothat. thegoodsmayrbe readily removed. therefrom.

The fabrics while being stitched. maybe an tomatically supported. and tensioned, aside-- scribed,.on the requisite. supportandmension. may be afforded by handorin any other con-. venient manner,nand. the devicessdescribed' may be secured directly andpermanently.to a sewing-machine instearhof beingorganized as aseparate attachment, all w ithout'departz ing from my invention.

Instead of spurs, d d. 01. other. projections. from the arbor D may. be; employed toae-ngage and hold the .fabrics in the required relation thereto, and the requisiteoseillation of the. fabrics and. arbor'D relatively. to. the. needle may be secured by other meana-thaulhose, specifically pointed out, or thelfeediugmay be accomplished. by means-other than the en.- gagement of the. spurs on the arbor with the, fabrics.

What I claim as new, and desire to secure; by Letters Patent, is the following, viz:

1. An. attachment for. a sewing-machine comprising a rotating and oscillating arbor,.to bend, feed and oscillate the fabrics relatively .neabs arbor to bend, feed and oscillate the fabrics,

relatively .tothe needle, .means to support, said arbor in required relation to theneedle and mechanism operativelyconnecting said.

arbor with said needle-bar.

4. .An, attachmentfor ,a sewing-machine comprising a rotating and oscillating arbor to bend, feed and oscillatethe fabrics, means-to support said arbor in relatiomtotheneedle and to withdraw, saidv arbor-from the needle, and A mechanism to operatively; connect, said arbor with the needle-bar of the machine.

5.; Anattachment: for a, sewi g -machine comprising a rotatingand oscillating arbor to bend, feed and oscillatethe fabrics relatively to the. needle,a movable inclinedplate, means: carried by said plate tosupport saidarbjor in;

required 1' relation. to theneedle, and mecham ism to operatively connect said arborwith the needle-bar ofthemachine. 111' 6. .Anattachmentfor a sewing-machine bend, feed and oscillate the fabrics relatively to the needle, a movable inclined plate, 0s"cil-. lating arms carried-by. said i .plate andsup-; porting said arbor, and mechanism; to opera tively connect said arms and said. arbor with theneedle-bar of themachine. .l i

t 7. An attachment fora sewing-machine comprising a rotating and. oscillating arbor to bend, feedand. oscillate thefabrics relatively to the needle, means tosjupportr said. arbor in required relation to. the :needl'e,;a. gear upon said arbor, a shaft rotatably supported in proximity tosaid arbor, .a gear upon said shaft. intermeshing with. thegeariupon said arbor,

a cam carriedbysaid shat-tan arm oscillated by 'said"cam.and "op'eratively connected with said means supporting said arbor, andm'e'chanism to operatively connectisaidsh'aft with the needle-bar of the.machine ;.tonrotate said shaft. I

8. An attachmentfor a sewing-machine comprising arotatingand oscillating arbor to bend, feed and oscillate the fabrics relatively to the needle, means to support said arbor in required relation to the needle, a gear upon said arbor, a shaft rotatably supported in proximity tosaid arbor, a gear upon said shaft intermeshing with the gear uponsaid arbor, a cam carried by said shaft, an arm'oscillated by said cam and operatively connected with a d; m an supp t n cida rbq satru wheel upon said shaft, a pawl intermittently actuating said trundle-wheel and mechanism to. operativel-y connect said pawl withthe needle-barof the machine to rotate said shaft.

1 ,9. An attachment for, a sewingmachine comprising a rotating and oscillating arborto bend, feed and oscillatethefabrics relatively to theneedle, means'to support said arbor in required relation ;;to the needle, a gear upon said arbor, a, shaft rotatably supported in proximity to said arboryai gear upon said shaft intermeshing with the gearupon said arbor,

a cam carr ed by said shaft, an arm oscillated by'said cam and .operati'vely connected ;with said means supporting said arbor, a trundlewheel upon said shaft, apawl intermittently actuating said trundle-wheel, a rock-shaft provided with .anarm carrying said pawland mechanism to operatively connect said rockshaft with the needle-barof the. machine.

10 An attachment for a sewing-machine, 7 comprising a rotating and oscillating arbor to bend, feed and oscillate the fabrics relatively tothe needle, means to support said arbor in :required relation to the needle, a gearupon said iarbor, a shaft rotatably supported in f proximity to said arbor, a gear upon said shaft jintermeshing with the gear. upon said arbor, ;a cam carried by said shaft, an armoscillated by said cam and operatively connected with {said means supporting said ,arborfa trundlewheel upon said shaft, a pawl intermittently actuating said trundle-wheel, a rock-fshaft provided with an arm carrying said pawl, an- ;other arm upon said rock-shaft, and .mechan-. -Iism to operatively connect said lastmen- Etioned arm with theneedle-bar of the machine. 1 11. An. attachment for a sewing-machine comprising a rotati'ngandoscillating arbor to bend, feed and oscillate thefabrics relatively .jto the needle, means to support said arborin required, relationto the needle, agear upon said arbor, a shaft rotatably, supported in proximity to said arbor, a gear upon .said shaft intermeshing with the gear upon-said arbor, a cam carried by said shaft, an arm. oscillatedby said cam andoperativelycon 'nected with said means supporting saidarbor, a trundle-wheel upon said shaft, apawl:

intermittently actuating said trundle-wheel,

a rock-shaft providedflwith an arm carrying said pawl, another arm upon said rock-shaft, .a post, .alever imovably pivoted to said. post and engaging at one end with the needle-bar of the machine and .at the otherwith said last-mentioned arm.

12. An attachment for a sewing-machinev comprising an arbor provided with a plurality of conical radially-disposed spurs each havingits central axis coincident with a radius of a vertical cross-section of the arbor to hold the fabrics and impart thereto the movements of the arbor, means to support said arbor in required relation to the needle, and means to operatively connect said arbor with the needle-bar of the machine to cause said arbor to rotate and move longitudinally.

13. An attachment for a sewing-machine comprising an arbor provided with circumferential recesses for the accommodation of the needle, means to support said arbor in required relation to the needle, and means to operatively connect said arbor with the use die-bar of the machine to cause said arbor to rotate and move longitudinally.

14. An attachment for a sewing-machine comprising an arborprovided with a plurality of conical radially-disposed spurs each having its central axis coincident with a radius of a vertical cross-section of the arbor to hold the fabrics and impart thereto the movements of the arbor, and with circumferential recesses for the accommodation of the needle, means to support said arbor in required relation to the needle, and means to operatively connect said arbor with the needle-bar of the machine to cause said arbor to rotate and move longitudinally.

15. An attachment for a sewing-machine comprising a rotating and oscillating arbor to' bend, feed and oscillate the fabrics relatively to the needle, means to support said arbor in required relation to the needle, mechanism to operatively connect said arbor with the needie-bar of the machine to cause said arbor to rotate and move longitudinally, a rotatory mandrel to automatically support and tension the fabrics relatively to said arbor, and means to support said mandrel and force it constantly away from said arbor.

16. An attachment for a sewing-machine comprising a rotating and oscillating arbor to bend, feed and oscillate the fabrics relatively to the needle, means to support said arbor in required relation to the needle, mechanism to operatively connect said arbor with the needle-bar of the machine to cause said arbor to rotate and move longitudinally, a retatory mandrel to automatically support and tension the fabrics relatively to said arbor, an arm at one of its ends rotatively supporting said mandrel and at its opposite end pivotally secured to a post stationarily fixed relatively to said arbor, and a spring actuating against said arm to rotate it upon its said piv- Jtal connection away from said arbor.

17. An attachment for a sewing-machine zomprising a rotating and oscillating arbor to bend, feed and oscillate the fabrics relatively to the needle, means to operatively connect said arbor with the needle-bar of the machine, a stationary part vertically disposed, and a vibrating arm pivoted to said stationary part, and provided with an eye disposed to receive the needle and control the thread.

18. An attachment for a sewing-machine comprising a rotating and oscillating arbor to bend, feed and oscillate the fabrics relatively to the needle and mechanism to operatively connect said arbor with the needle-bar of the machine, said mechanism comprising a pair of oscillating arms supporting said arbor and pivotally secured, a bell-crank lever pivotally supported and having one of its arms pivoted to one of said first-mentioned oscillating arms, a fixed collar, a rod secured to the other arm of said bell-crank lever and passing through said collar, a threaded portion beyond said collar and a knurl-nut coacting with said threaded portion of said rod.

19. An attachment for a sewing-machine comprising an arbor provided with a plurality of conical radially-disposed spurs each having its central axis coincident with a radius of a vertical cross-section of the arbor and the sides of its cone, to hold the fabrics and impart thereto the movements of the arbor, means to support said arbor in required relation to the needle, and means operatively connecting said arbor with the needle-bar of the machine to cause said arbor to rotate and move longitudinally.

20. An attachment for a sewing-machine comprising a rotating arbor having radiallyextending projections to bend, engage and feed the fabrics relatively to the needle of said machine, means to support and rotate said arbor in required relation to said needle and means to move the arbor longitudinally.

21. An attachment for a sewing-machine comprising an arbor to bend and support the fabrics under tension relatively to the needle, mechanism to feed said fabrics relatively to said arbor and needle, and means, operatively connecting said arbor with the needlebar of the machine, to move the arbor longitudinally alternately in opposite directions transversely of the direction of feed between each descent of the needle.

EDWIN DONALDSON.

Witnesses:

PHILIP O. PECK, WILLIAM STAHL.

IOO

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