US1158391A

US1158391A - Scallop-stitching machine.

Info

Publication number: US1158391A
Application number: US76844013A
Authority: US
Inventors: John C Ringe
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1913-05-19
Filing date: 1913-05-19
Publication date: 1915-10-26
Anticipated expiration: 1932-10-26

Description

1. c. RINGE.. SCALLOP STITQHING MA CHINE.

'APPLICATION FILED MAY I9. 1913.

'Patented 0t.26,191.

3 SHEETS-SHEET l- Mmmm WITNESSES:

l. C. RNGE. scALLoP sTlTcHlNG MACHINE; .APPLICATION FILED MAY 1'9. l9l3.

.Patented 0d. 26, 1915.

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3 gEETS-SHEET 2.

Don... wl N. V N l.

. J. C. RINGE. SCALLOP STITCHING MACHINE. APPLICATION IILED MAY I9. 1913.

tented 0ct.26,1915. 3 SHEETS-SHEET 3 'nqngus Fmns. nig. um.. wwwrun, u. 4c.

l ramener?.

iiNiTnn sTaTns raTnNT orricnj 'JOHN C. RINGE, or BRIDGEPORT, CONNECTICUT, assrCrNon To THnsTNGER MANU-- vFACTURING COMPANY, A CORPORATION OF Nnw JERSEY.

sCALLoP-STITCHING MACHINE.

Specification of Letters Patent. Patent-@d @at 26, 1915.

` Application led May 19, 1913. ScrialNo, 768,440.

To all'uflwm tf/my Concern:

Be it ,known that 1, JOHN C. RIN-GE, a 'citizen of the United States, residing .at

Bridgeport, in the county of Fairfield andV State of Connecticut, have inventedcertain newy and useful Improvementsin Scallop- Stitching Machines, of which the l 'tollowing is a specification, reference being had there in to the accompanying drawings.

This invention relates to an in'iprovement.

on, or modification of, the Singer scalloping machine forming the subject of the patent ot Martin Hemleb', No. 1,102,405, dated July 7, 1914, and is designed, like saidl machine, for production or' series ot' substantially parallel seams, l/whetherrectilinear, -zigzag or scalloped, with, an embroidery thread led in a sinuous path and secured upon the tace of vthe ivorl by means of said parallel seams,

the formsl of said seams being controlled 'by a 'patterncam vvhichf imparts sidewise workshifting movements to the feed-dog and therewithlalso Lto.l the y,throat plate.t p

The present'i'nvention has for its primary objectto provide for the production of scalloped lseams of enhanced appearance and conforming more strict-ly than has been usually possible heretofore with the pattern represented by the pattern-carn-y In accordance Wit-h the invention, in order to eliminate liability toy drag upon the goods being shifted sidewise, occasioned by fric-y tion due to the engagement ofthe upper tace thereof by the presser-toot, which tends to destroy. the form of the scallops, the presser-foot is arranged to participate in the sideivise shifting movement, and it is lfurther adapted to conform With the surfaceofthe work in its variations in thickness, produced by the scallop, Aby construction in several sections arranged side-by-side cachindependently mounted, with the outermost sections connected together tor `reciprocal rising and falling movement and the. intermediate section or sections adaptedto yield directly inthe 'path ot'pthe stitch-forming mechanism. I p

vThe presser-'toot preferably carries in advance of Vthe stitching mechanism a smooth.- ing plategformed4` with an 4inspection aperture, abo'yel which '-isarraniged `an ,inclined tubular stripper-fingerv adapted notA only to strip the Worlcfrom `theiinecdles in their ascent but to supply, when desired, a filling cord beneath the embroidery thread. i

It a desideratum to vary the length of the stitches oi the scallops so as to overcome to effect, on the sidevvise shifting movement tion between the actuating means anda crank-armen said rock-shatt..A 'p 1n the"productionot seams involving comparativelylabruptlcurves, it is desirable to relieve the pressure' of the presser-toot,l up'on the workfwhile-the needlesare in the the effect otOpticalillusionproduced byapparent increase of the spacing apart of the yseallop-stitches tow-ard the points of' each sci illop.`^ To thisendpmeans are provided. lffor varying the extent of rocking move-- iinents ofthe teedactuating lrock-shaftl so as latter, so that.'- tlie'xfabric may be turnedl l slightly around the -needlesunder :its O Wn elasticity without ithell'resistance theretoinormally imposed' by the .presser-foot. v.Autoinatically acting means are provided for im-4 parting this lifting movement to the4 presserfoot, such means `being'adapted to -be ren.- ldered ineieotive so long as the generaldirection of feed is ina straight line`,but adaptedtov be thrown into action when a short curve is to be made.- I

1n thel `accompanying drawings, Figure '1 is afsectional side elevation of a machine'em-- bodying the present improvements; and Fig. 1a an external view1v ot'v a portion of the bracket-arm head andy thepresser-foot litter with its tlirw-out device; FigrZ is aplan of portions of the machine beneath the bracketarm; and Fig.`2a a plan, upon an enlarged scale, of a portion of the throat-plate and the stripper-finger. Fig. 3 isa View ofthe under side of the machine.l Fig. i is a front elevation "of the machine in lpartial transverse section with the base-plate in section. Fig. .is an edge view vof the pattern cam` Wheel and its actuating means, and Fig. 6 a4 side elevationfof the feed-actuating means.

Fig. ,l is a perspective view of the stripper: inger a nd its supporting arm. F ig. 8,.' isan elevatii, of the presserfoot and slide-block i to' which kit is attached, Fig. 9 a rear side Fig. t'. Fig. 11 is afperspectivegview,offthe' work-engaging members each entering its kn: i.

central presser-foot section and F ig. 12 a j similar view of one of foot sections.

The machine frame comprises the bed.

the lateral presserplate 1 and overhanging bracket-mm2 with head 3.* in which is journaled the main-shaft 4 ca I yingf at vits rearward end the balancelwhee 5 and. belt-wheel 6. At its forward .endl the `main-shaft has the -takefup camcylinder 7 with crank-pin 8 connected by v the pitman ,9 with the lateral stud l0 upon' collar l1 fixed'upony the needle-bar 12 Suiv connections "with whichisprovided withthe needle-clamp 13 carrying the spaced needles 14 which are in practice disposed in a line parallel with the-mainfshaft. Coperating with the'nee- :iles-in the production of parallel seams is 'the-shuttle .1 5 fitted in "the shuttle-race 16y and carrying the thread-case 17, theshuttle being actuated'fthrough .usual orf suitable the actuating cran-1g 18 of :.tle" mainshaft.

.g'rhe feeding mechanism comprises the i usual feed-dog19fwhieh is in practice'pro-4 vided with a series of "serratedparallel respective...slot 20 inthe throat-plate2l,

e lwhich is shown provided' (Fig. 2a) with the -slidinalyf mounted, ybeing confined thereony elongated transverse needle-aperture 22. The top of the bed-plate'is recessed to form -a seat 123 upon which the throat-plate 1s by means of. the guide-strips 24 secured in position' bythe fastening Uscrews 25. -v

.Slag

ingmovements are imp-arted to the feed]` rock-shaft, through the Vlongitudinally slot- -ted 'crank-arm 32-'fixed vuponits rearward end and havingy fitted thereto the slide-block carrying` the `stud-screw 33 entering the `ape'rtured lower extremity of'the link-bar.

34. whose opposite end jis provided with the yokeiembracing `the'collar 36 fitted up'on theeed-a'ctuating.eccentric 37 carried by 'thejlmainshaft As other Singer ma'- ichines, the' link-bar 34 carries the lateral stud 38 embraced byone end of the link 39 whose apertured opposite end is entered by the stud 40 carried by the arm 41 of the feed-regulating angle-lever whose other arm has a lreduced and flattened outer end portion. 43 confined between the adjusting screws44 and 45 mounted in' the fixed 4lugs Qe6-yand 4.7 sustained by the bracket-arm lower side of the feed-dog carrier 27 isizlformed witha longitudinal groove 48 entiered by the sidewise tiltingr roller 49 which is'carried by the lateral arm 50 whose-hub -59. .Secured upon its lowery extremity by -64-(Fig. 10).- Fitted within said slideway .extremity 63 of the screw-pin 64 to lock the the fulcrum-stud 8 1 with a vertical socket the bearing-pins 52 and has fixed upon its rearward end the crank-arm` 53 pivotally connected by the pin 54 with the lower end 70 .of the-pitln-an-rod 55 which has at' its uppler end the strap 56 .embracing the feed-lifting eccentric 57 upon the main-shaft. The feeding mechanism imparts to the work its advance movement crosswise of lthe bedplate and of the line of the needles.

The Apresser-bar 58 is'journaled in the head of the bracket-arm and is normally pressed downwardly by means of the spring means ofthe clamp-screw 60 is the split hub 61 of a cross-member 62 formed in its lowerl "side with a slideway entered atone side by the reduced4 extremityv 63 of the screw-pin.

is, the tongue 6 5 upon the-upper side of the Slide-block 66 having 'at one end the aperture 67, said tongue being provided ,with a lateral channel which is entered by the reduced slide-block within said slideway. As rep# resented in Figs.`8 to 12 inclusive, the slideblock 66 has -secured'to a depending portion thereof by screws 68 a bar 69 which .is provided in the inner face near the opposite ends with the parallel vertical recesses 70 in which are fitted the blocks 71 each carrying a pivotal stud 72 which enters an aperture inthe lug 73 of the plate 74. The plate 74 has its opposite edges fitted between the `walls'ofthe channel 75 formed in the upper face of the pressure plate 76 to which it is pivotally secured by means of the cross-pin 77 dispose-d transversely to the stud 72, whereby the pressure plate 76 is adapted to rock either crosswise or lengthwise to accommodate itself to unevenness in the fabric.

Each of the blocks 71 carries a forwardly projecting stud 78 passing;` through the slot 79 of the bar 69 .and entering the forked extremity ofthe rockingplate 80 fulcrumed by means of the screw-stud 81 upon the bar 69 intermediate the recesses 70. The rocking element 80 thus forms a compensating connection between the outer presser-foot sections whlch permits them to accommo- 'date themselves to different thicknesses of fabric upon opposite sides of the stitching point.

The slide-block 66 is formed rearward of 120 82 entered by the tubular boss 83 of a rectangular block 84 fitted between the parallel upturned flanges 85 ofthe central pressure plate 86 which isr pivotally connected 125 with said block by means of the cross-pin 87 so as to rock thereon. The pressure plate 86 isy ,normally pressed downwardly by means of thespring 88 within the hub 83, which latter is formed with Vaslot 83 en- 13G `tiered by the reduced inner end of the screwlstud 89 whereby the parts are looked to igather and prevented froml turning relatively The aperture 67 ofv the slide-block 66 is entered by the screw-bolt 90 by which the slide-block is pivotally connected With one 1.0 f the 'apertured ends of the arched link 91 Whose other end is similarly'connected by vmeansfof thescreW-bolt 92 with a post 93 Whose foot 94 1s secured upon the lateral-extension' 21. of the sideWise movable throatplate 21, the latter being provided `With' depending guide-blocks 95 secured thereto by `screvlvs 96 and embracing the opposite edges of the feed-dog 19 (Figl), so as to partake of lts lateral'movements.

Formed upon the outer portion oftheI take-up cam-cyl1nder-7 is the eccentric camtrack 97 adapted for engagement by the roller 98 which is mounted upon` the pin 99 Within the forked extremity of the swinging arm 100 loosely mounted upon the rocking pin' 101 which is journaled in the bearing boss V102 ofy the bracket-arm head 3. The arm 1 00 is normally maintained by means of the spring 103.With the roller 98 Withdrawn from operative relation with the cam- 1 The arm 100-is formed with a transverse aperture 104 which, When .said arm is pressed forward into operative relation with the cam-track 97, is entered by the head 105 of the spring-pressed coupling pin 106 journaled in the apertured boss 107 of an arm .108..secui'ed by means of the set-screw 109 upon the rearward end of the` rocking pin 101'. 'The coupling pin 106 is formed With a head 110 'having a groove 111 entered by the rounded extremity of the arm 112 of an velbow-'lever mounted upon the fulcrum-pin 113y betweenthe spaced lateral ears 108 of 'thearm 108. and ,provided with a lateral arm 114.

Secured upon the forward end of the rocking pin 101 by means of the clamp-screw 115 is the split hub 116 of a lateral arm 117 whose rounded extremity is extended beneath the hub 118 of the rearwardly eX- tending lifting lug 119 secured upon the presser-bar 58. When the arms 100 and 10.8

are coupled together, the presser-bar receives short lifting movements bythe action -of the cam-track 97 through the connections designed for use only in stitching aroundA curves which are sufficiently abrupt to ren-A der it diiicult to properly guide the Workv without release of the pressure of the presser-foot thereon.l Y

As represented in the patent above referred to, the 1nainshaft carries yat its forward end a cam 120 which' is embraced bv the forked upper arm 121 of a rock-lever fulcrumed upon the pin 122 and having a tension 124 formed with the downwardly in! clined and apertured yend portion 125 adapted to carry the covering or embroidery thread and receiving yfrom the cam 120 operative movements in the direction 0f feed. The Spreader comprises the stem 126- having the depending thread-engaging spur 127y and the upturned thread-deflecting finger 1128, the stem being secured by screws 129 to a depending extension of the lateral armv 130, whose hub 131 is journaled upon the presser-bar between the thrust-collars 132 and is provided with a second arm 133 con` nected by the link 134 with the crank-arml 135 upon the vertical rock-shaft 136 having at its upper end the crank-arm 137 carry-- ing the stud-pin 138. The stud-pin 138 is embraced by the strap 139 at one end of a pitman 140 having at its opposite end the strap 141 which embraces the stud-pin 142 carried by the upper arm 143 of a rock-lever fulcrumed at144 upon the bracket-arm and having the'depending arm 145 carrying the roller-stud 146 which enters the cam-groove 4147 of the cam-cylinder 148 which acts, through the described connections, to vibrate the spreader in an arcuate path oblique to the line of the needles, .or around an axissituated behind and unsymmetrical'ly in relation to, 'the line of the needles.

Upon the main-shaft is kfixed a collar 149 having whichis fitted the block 150 carrying the eccentric 151 formed with an elongated clearance aperture 152 embracing the shaft, the block 150 being adapted to beshifted crosswise l0f the shaft 4 by means of the adjust- `depending arm 123 provided with van exa transverse undercut groove to ing Screw 153, to change the-throw of the eccentric 151 in a manner well known. The eccentric 151 is embraced b v the strap 154 at the upper end of the rod 155 whose lower end carries the lateral stud 150 embraced vb v a strap 157 of the lateral arm 158 of an v elbow-lever whose hub 159 is journaled upon the shaft 160 mounted in the bea ring bracket 161 and provided with an upwardly ex-A tending arm 102 carrying the stud-screw 163 upon which is mounted the actuating pawl 104 having an angular hub 105 upon which rests' the free end of a spring 100 by means of which the operative end of the pawl is maintained in engagement with the' peripheral teeth 10T of the ratchet-wheel.4 16S loosely mounted upon the stationary shaft or stud 160. The foot of the bearing; bracket 161 is formed with a socket 169 in which is fitted the detent plug 170 normally pressed upwardly b v means of the spring` 171 and provided `in its. upper end with a tooth 172 adapted to engage the ratchet-teeth 167 to prevent retrograde movement of the ratchetwlieel.

Mounted upon the` forward end of the. ratchet-wheel hub and detachably retained thereon by means of the nut 173 upon the threaded end of the stud 160 and the interposed plural-armed spring-plate 174 is the cam-disk 175 which is shown in Fig. 1 formed with the triangular' cam-groove 176 entered by the roller-stud 177 upon the upper arm 178 of a rock-lever mounted upon the fulcrum-stud 179 .sustained by the bracket 161 and having' the depending` arm 180 extending through an aperture 1 of the bed-plate and provided with the longitudinal slot 181 extending; lengthwise thereof. liithin the slot 181 is adjustably secured yby suitable means the' stud-pin 182 embraced by the strap 18? at the rearward end of the-pitman 184 provided at its forward end with the strap embracing the stud-pin 186 which is sustained by the depending' lugl 187 of the feed-dog carrier 27. By the described connections. a slow sidewise movement is imparted to the feeddog, and through it to the sectional presserfoot.4 by means of the cam-disk 175, the

4speed of rotation of which may be varied 'by adjustment of the position of the actuating eccentric 1-51 relatively to the mainshaft. ABy turning the pawl 161 upwardly, the rotation of the cam-wheel may be discontinued so as to produce a straight-away seam.

The rock-lever arm 181 is formed on its rearward edge with a lug' 180 carrying' the stud-pin 188 embraced by the strap 189 at one end of a pitman 190 having at its opposite end the strap 191 emliracing the studpin 192 which is carried by a lever 193 mounted upon the fulcrum screw-stud 194 tapped into the bottom of the bed-plate 1. The lever 193 yhas a lateral arm 195 carrying' the depending stud-pin 196 which is embraced by the strap 197 at one end of the pitman 198 having' at its opposite end the strap 199 which embraces the stud-pin 200 tapped into the slide-block 33 of the feed rock-shaft arm 32. The parts are so arranged and proportioned that as the stitchingr al'iproaches and recedes from the points of vthe scallops the point of connection of the link-bar 31- with the feed rock-shaft. crank-arn'i 23? coi-respondngly approaches and recedes from said rock-shaft. thereby effecting" a slight progressive increase and decrease. respectively. in the spacing' of the stitches so as to prevent their apparent excessive crowding' especially in the case of deep scallops with comparativelv points.

Rigidly secured upon the top of the crossmember 62 by means of the screw 201 is the` shank 202 of a bent arm 203 carrying' at its lower end athin spring blade 201L provided with the tubular stripper-finger 205 and the apertured cord-guiding lug 206 in alinement therewith. rl'he finger 205s arranged in advance of the presser-foot and inclined downwardly toward'and extends partially across the needle-aperture 22 between the needles. This stripper-finger exercises an important function ,in stripping' the fabric from the needles in their rising movement,A as'the presser-foot is arranged entirely be-A hind the needles. B v passing a filling cord through the, g'uide 206 and tubular linger 205, the cord is caused to be enibraced within the covering' seam `)soms to assist the coverin'g or embroidery thread in effectivelycovering the face of the woi'l( between the attaching` lines o f stitches while producing an ornamental raised appearance of the seam.

Secured to the end of the slide-block 66 by means of the fastening screw 207 is a. rigid arm 208 having secured to a lateral extension 208 at the outer end thereof by means of thescrews 209 the spring smoothing' pl'ate210 whose forward edg'e is adapted. lwhen the presser-foot is depressed. to rest upon the throat-plate beneath the operative end of the stripper-linger 205 and in advance of the needl aperture 22. The plate 210 is formed with an inspection aperture 211 to enable the operator to readily see the part of the fabric to which the stitching is to be applied. the free edge of the smooth` ing plate performing' the function. as the terni implies. of maintaining the surface of the fabric flat and free from wrinkles immediately in advance of the stitching' point. A backing' mem'.` r Q12? secured in position hy the screws 269, is preferably employed to support the plate'210 when the presser-fopt 110 is lifted.

Having thus set forth the nature of. the invention, what 1 claim herein is:`

1. In a sewing machine, the combination with' a throat-plate. stitch-forming' mecha- 115 nism. and feeding mechanism including a feed-dog and means for imparting' thereto longitudinal work-advancing 'movements sharp `and sidewise step-by-step movements. of a presser-bar movable toward and from the 12o throat-plate, presser-foot mounted upon said presser-l ar and comprisingr a mei'nber movable transversely of and maintained in i-xcd angular relation with the presser-bar, and means connected withsaid transversely movable member for imparting to the presser-foot sidewise movements corresi'ionding with those of the feed-dog'.

2. 1n a sewing' machine, the combimition with a throat-plate, stitch-forming niechanism, and feeding mechanism including a feed-doe' and means for nniartiner thereto 2". b longitudinal work-advancine' movements b b l and sidewise step-by-step movements, of a presser-bai' movable toward and from the .throat-plate, a presser-foot mounted upon said presser-bar and 'comprising a member movable transversely of and nniintained inl iixed angular relation with the presser-bar and `carrying laterally7 spaced "and positively connected compensatingpressure members,

and means connected with said transversely movable member for imparting to the presser-foot sidewise movements corresponding` with those of the feed-dog. i

3. In a sewing machine, the con'ibination with a throat-plate.v stitch-forming mechanis-m, and feeding mechanism Aincluding a feed-dog and means forimparting .thereto longitudinal work-advancing Amovements and sidewise step-by-step movements, of a presser-bar movable toward and from the throat-plate, a presser-foot mounted upon. said presser-bar and comprising a. member movable transversely of and maintained in fixed angular relation with the presser-bar and carrying laterally spaced and positively connected compensating` pressure mei-nbers and an intermediate independently yielding member, and .means connected with said transversely movable member for imparting to the presser-foot sidewise movements corv responding w'ith those of the feed-dog.

- 4. In a sewing machine, the combination with stitch-forming mechanism and'feeding mechanism including a feed-dog and vmeans for imparting thereto longitudinal workadvancing movements and sidewise movements, of a spring-pressed presser-bar mounted in fixed bearings and provided with a. transverseslideway, a slide-block fitter to said slideway, a presser-foot sustained by said block, and a link' pivotally connected with said block vfor imparting' to said presser-foot sidewise n'iovei'nents.

5. In a sewing machine, the combination with stitch-forming mechanism and feeding mechanism including a feed-dog and means for ii'nparting` thereto wink-advancing and sidewise movements. of a .presser-foot composed lof a plurality of independent sections 4 arranged crosswise of the direction of feed, a compensating connection between the outermost sections` and means for yieldingly si'istaining an intermediate section.

In a sewing machine, the combination with Stitch-forming mechanisn'i andfeeding mechanism including a feed-dog and means.

for im iart'ine" thereto work-advancing .and

y b l i sidewise movements, of a presser-foot coinposed of aplurality of independent sections arranged crosswise of the direction of feed, and a rocking element pivotally connected with each of the outermost sections and having an intermediate fulcrum.

7. In a sewing machine, the combination with stitch-:forming mechanism and feeding mechanism including a feed-dog and means forv imparting thereto longitudinal.work-advancing movements and sidewise movements, ota presser-bar provided with a cross-meinber formed with a slideway, a slide-block itted within said slideway and foi-ined with aseries of parallel recesses, a presser-foot `constructed with a plurality of imlepei'identsectionsv each ,having a shank fitted within one vof said recesses, a rocki'ngrelement fulcruined-iil'ion said slide-block and pivotally connccli-idl with the outermost. presser-foot sections,ga-sln'ing interposed between ran intermediate'section and theslide-block, and a cimnection betweenthe feed-dog actuating means and said sliile-blo'clcifor'imparting to the latter sidewise movements.

b. In a sewing machine, the combination with stitch-formingn-iechanisin and feedingmechanism including` a feed-dog, and means whereby they are adapted. to produce paral tomatically acting means including opera-- tive elements connected together by a coupling device and operating while the needles are in the work for lifting the presser-foot, and means acting` through said coupling device to lisconnect said elements for rendering said lifting means inetfective while the stitching proceeds.

l0. In a sewing machine, the combination with stitcli-forming mechanism comprising a pluralit)Y of spaced needles reciprocating in unison, and feeding mechanism including a feed-dog, and means whereby they are adapted fin'- production of'parallel seams, of a messer-foot opposed to said feed-dog, and presser-,foot lifting means coi'nprising a'rock-shaft operatively connected with the presser-foot,y an arm fixed upon said rockshaft, an. adjacent arm loosely mounted on said rock-shaft, and a coupling element af- `foi-ding a detachable connection ,between said fixed and loosely mounted arms.

11. In a sewing machine, the combination with stitch-forming,mechanism and'feeding mechanism including a feed-dog and means for impartingthereto longitudinal work-advancing movements whereby parallel seams stitches between the middle may beprodu'c'ed,`of shifting means for producing relative sidewise movements between.

thestitch-forming mechanism and the feed- .dog whereby said seams are produced 1n K jtheforln of scallops, and means controlled 'bythe lateral position of the feed-dog relatively to the stitch-forming mechanism for .progressively varying. the spacing apart of the stitches between the middle portions and ends of the scallops.

12. Ina seWi-ngmachine, the combination with stitch-.forming mechanism comprising a pluralityof needles mounted in fixed spac- 4 ing apart, andfeeding mechanism including l5 a feed-dog and means for impartmg thereto longitudinal workadvancing movements whereby parallel seams may be produced, of shifting means for producing relative sidewise-movements between the stitch-forming '20 1nechani'sm and the feed-dog whereby said seams are. produced in the form of scallops, and means' connected with sai-d shifting means and acting through the'work-advancing'ineans" for progressively varying the 25. spacing apart of the stitches between the middle portions and ends of the scallops.

13. In a sewing machine, the combination withv stitch-forming mechanism comprising aplurality of needles connected to recipro- 30. cate in unison, and means' coperatingtherewith in producing parallel' seams connected by thread overlying the face of the work I, intermediate said seams, and feeding mechanism including a 'feed-dog and means for iinparting thereto a longitudinal work-advancing movement following each simultaneous reciprocation of the needles whereby parallel seams may be produced, of shifting means for producmg relative sidewise move- 44): ments between the stitch-forming mecha- -nism and the feed-dog whereby said seams are produced in theform of scallops, and

means'controlled by the lateral position of the feed-dog relatively to the stitch-forming mechanism for progressively varying the 'spacing apart of -the stitches between the middle portions and ends of the scallops.

' 14. In a sewing machine, t-he combination .with stitch-forming mechanism 'and feeding .mechanism including a feed-dog and means for imparting thereto longitudinal workadvancing movements whereby parallel seams may be produced, of shifting means forl imparting to the feed-dog sidewise movements vwhereby saidl seams are pro- `duced in the form of scallops, and means nism including a feed-dog and means for imparting thereto work-advancing' movements, and a thread-carrier movable crosswise of the direction of feed and acting to lay a thread upon the face of the work between the needles, of means for imparting to the feed-dog sidewise movements in the same direction during a succession of stitchforming periods, and means connected therewith for varying the extent of advance movements of the feed-dog correspondingly with its lateral displacement from an initial position.

1G. In a sewing machine, the combination with stitch-forming mechanism including a plurality of spaced needles, feeding mechanism including a feed-dog and means for imparting thereto workadvancing movements, and a thread-carrier movable crosswise of the direction of feed and. acting to lay a thread upon the face of the work between the needles, of means having independent connections with the feed-dog and its actuating means and adapted to simultaneously shift the lateral position of the feed-dog and change the extent of its workadvancing movements.

17. In a sewing machine, the combination with stitch-forming mechanism `including a plurality of spaced needles, feeding mechanism including a feed-dog disposed rearward of said needles, a thread-carrier movable crosswise of the direction of feed and act-ing to lay a covering thread upon the face of the work between the needles, and a throat-plate, of a. presser-foot disposed rearward of the needles, a downwardly inclined smoothing plate adapted to yield independently of the presser-foot and having its operative edge opposed to the throat-plate `and in advance of the needles, and means for imparting step-by-step sidewise movements to the feed-dog, throat-plate and smoothing plate.

18. In a sewing machine, the combination with stitch-forming mechanism including a plurality of spaced needles, feeding mechanism including a feed-dog disposed rearward of said needles, a` thread-carrier movable crosswise of the direction of feed and acting to lay a covering thread upon thc face of the work between the needles, and a throat-plate, of a presser-foot disposed rearward of the needles, and a downwardly inclined spring smoothing plate formed` in its central portion with an inspection aperture and having its operative edge opposed to the throat-plate in advance of the ncedles.

19. ln a sewing machine, the combination with stitch-forming mechanism including a plurality of spaced needles. feeding mechanism .including a feed-dog disposed rearward of said needles. a tlnead-carrier movable crosswise of the direction of l'ced and acting` to lay a covering thread upon the face of the work between the needles, and

the work between the needles, and a presserfoot opposed to the feed-dog and movable sidewise with the same, of a downwardly inclined tubular stripper-linger directed intermediate and having?r its extremity in substantial alinenient with said needles, and adapted to lay n. cord beneath said covering thread.

In testimony'whereof, l have signed my name to this specification, in the presence of two subscribing witnesses.

JOHN C. RlNGE.

Witnesses STANLEY N. SMITH, HENRYJ. MiLLEn.