US1356334A

US1356334A - Joseph berger

Info

Publication number: US1356334A
Authority: US
Publication date: 1920-10-19
Anticipated expiration: 1937-10-19
Also published as: DE314614C

Description

J. BERGER, im

SEWING MACHINE` APPucATioN man :uw 2c, :915.

Patentd Oct. 19, 1920.

r y SSREET l A10"? fen (al i (fi/A3672# Hfylqif J7".

MLLML l. BERGER, Jn.

SEWING MACHINE.

APPLICATION FILED )ULY 20. 1915 Patented Oct. 19, 1920.

l0 SHEETS-SHEET 2 L BERGER, JR. SEWNG MACHXNE. APPglcAloN man 1uLY2o.1915.

1,356,334. 'Patented Oct. 19, 1920.

l0 SHEETS-'SHEET 3 J. BERGER, Je. SEWlNG MACHINE. APPLscATloN man 1uLv2o.l915.

1,356,334. Patented Oct. 19, 1920.

l0 SHEETS-SHEET 4.

1. BERGER, 1R. SEWING MAcHlNE.

APPUCATIUN YILED JULY 20. 1915.

l,856,334, Patented Oct. 19, 1920.

Jij/96. U5 155 J. BERGER, Je* SEWWG MACHENE. APPLICAUQN mw www, ma.

1,356,334. Patented Oct. 19, 1920.

OISHEETSMSHEET J. BERGER, 1n.

SEWING MACHINE.

APPLICATION r\|.ED1uLv2o.19|5.

1,356,334. Patented Oct. 19, 1920.

I0 SHEETS-SHEET l'.

AJ. BERGER, JR.

SEWiNG MACHINE.

APPUCATIGN mio 1uu2o.|915.

1,356,334. Patnted Oct. 19, 1920.

l() SHEETS-SHEET H.

J. BERGER, Jn. SEWING MACHINE. APPLICATION FxLEn1uLv2o.1915.

Patented Oot. 19, 1920.

)D SHEETS-SHEET 9.

J. BERGER, JR. SEWING MACHINE. "APPLxcATxnN nLEo1uLY2o,1915.

1,356,334, Patented Oct. 19, 1920.

' 'M' 1o SHEETS-sneu zo.

' 'UNITED STATES PATENT optics- JOSEPH BERGER, JB., F UTICAfNEW YORK, ASSIGNOR T0 UNION SPECIAL MACHINE COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SEWING-MACHINF of whichthe following is adescription, reference being had tofthe accompanying drawing and to the figures 0i reference marked thereon. 1 l

The invention relates to new and useful improvements in sewing machines and more particularly to a sewing machine adapted to make a flat scam for covering or Joining the edges of fabric,` f

An object of the invention is to provide a sewing machine' of the above character having a standard and an overhangin' arm supportingthe needles and cross stitc ing mechanism, with a supporting arm which is carried by the standard and which projects outwardly and upwardly from the standard and carries a depending portion which supports at its'lower end the work supporting arm proper, whereby, small tubular articles may be formed about said Work sup porting arm :md fed ofi' from the end thereof las they are stitched.-

A further object of the. invention is to provide a sewing machine' for formino' a lint scam with stitchi'ng'mechanism whic com prises in effect two independent sets of stitching mechanism, 'one operating in the rear of theother, and so Varranged that each forms parallel rows of connected needle. loops, the needle loo s and connected threads formed .by one 'ing mechanism overlying in part or in wholethe needle 4`loops and connecting threads' formed by the other stitch forming mechanism. I

A further object sans .invasion ig to 'provide means for guiding the edges `oftwn sections of a fabric to be joined or covered, so that the edges 'of said sections moet substantially midway between the outer needles of the stitch forming mechanisms. t

A still further object of the invention is to provide means for ,trimming the edges of [two sections of a'fabric to be joined prior to the lioinng or covering of the rsame by the stitching mechanism. l

A still further object of the invention is to provide a stitching' mechanism of the above character which consists of two setsof i spaced needles, one set being arranged and Spcicaticn of Letters Patent.

Application tiled July 20, 1915.

Patented Oct. 19, 1920.

Serial No. 40.895.

operating in the renr of the other'n'ith se )arate romplcmentnl stitch forming mec anism for cach set oi needles.

A still further object of the invention is to provide ai stitching mechanism of the above character with separate thread la ing'devices above the fabric for euch set o needles.

These and other objects will in part be obvious and will -in part b'e hereinafter more fully disclosed. y

In the drawings which show by way of illustration one embodiment of the invention,-

Figure l is a plan view of a sewing machine embodying my improvements;

Fig. 1a is a plan view of one of the cover plates,"

Fig. Qis a rcar elevation of the machine;

Fig. 3 is an end elevation of the same;

F ig. 4 is a sectional view on the line 4 4 of Fig. l;

Fig. 5 is a vertical longitudinal sectional view of' the` work supporting arm and the de )ending arm which supports the same;

ig. G is n horizontal sectional View through a portion of the work supporting arm. the throat plate being shown in plan;

Fig. 7 is a sectional view on the line 7-7 of Fig. 5;

Fig. 8 is a sectional view on the line 8--8 of Fig.V 5;

Fig. 9 is a sectional View on the line 9--9 of F ig. 5;

Fig. 10 is asectional view on the line- 10-10 of Fig. 9;

Fi 11 is a sectional view on the line Il 1 of Fig. 6;

Fig. 12 is s, detail of the lo er end of the depending arm, showing the cans for adjusting the 'stroke of the diierential feed igfil is a detailI partly in section and partly in plano an enlarged scale, showing the endA of th worksupporting arm, the

`presser foot, tire needles, the thread laying.

devices copefating with the needles and a portion ci??? mcheni gior operating, the

give access to ttd lines the strip` 417, but showing the thread laying hooks when brought into engagement with 4 the cross threads;

Fig. 19 is a View similar to Fig. 18, but showing the thread layin ho ks moved to a position where the neet les pass between the strands of the loops car edby the respective hooks;

Fig. 2O is a detail in pers ctive showing the auxiliary feed dog and its supporting bar;

Fig. 21 is a detail in perspective showing the main feed dog and the supporting bar therefor;

Fig. 22 is a sectional view on the line 22-22 of Fig. 20;

` Fig. 23 a detail in perspective showing the end ofthe looper shaft and also showing one o the looper carriers detached;

Fig. 24 is adetail partly in section showing the needle bar and the manner of supporting the needles. said View being trom in front of the needlebar;

Fig. 25 is a detail showing the needle bar and the needle supported thereby as viewed from the left in Fig. 24:

Fig. 26 is a similar View from the 'rear of the needle bar;

Fig.`27 is a View of the needle bar and needles from the right, as viewed in Fig. 24;

Fig. 28 is a sectional view on the line 28-28 of Fig. 27;

Fig. 29 is a plan view ofgthe needle clamp7 the needle bar being in section;

Fig. 30 is a top plan View of the presser foot;

Fig. 31 is a sectional View on 31--31 of Fig. 30;

Fig. 32 is a detail view partly in vertical the line section, showingthe manner of attaching the trimmer arm to its operating yoke;

Fig. 33 is a detail 4partly in front elevation and partly in'yertical section; showingV a modified form of stitch forming mechanism; f 1

Fig. 34 is a plan View, more or less di'agrammatically showing the loopers and the loop retainer whichcoperates with one of the loopers;

Fig. 35 is a planV View of a'lthroat late used in connectionwith Vthis modified crm of stitch formingmechanisin;

- dies.

Fig. 36 is a front elevation of the needle clamp and needles;

Fig. 37 is a bottom plan View; and Fig. 38 is a top plan View showing the seam made by this stitch forming mechanisin.

(fle/neral structure.

The intention consists generally in a sewing machine having a supporting standard which carries an overhanglng arm in which reciprocates the n'eedle bar carrying the nee The operating shaft for the machine is located in the standard. Also mounted in the standard and extending outwardly and upwardly therefrom is a supportinv arm and this supporting arm at its tree enA carries a horizontal arm which is parallel with the overhanging arm of the machine and it is also raised above the plan of the base of the machine. so that an operator may readily reach beneath said horizontal arm. The horizontal arm at its free end carries a depending arm and this depending arm at its lower end carries the work snpporting arm proper of the machine which is [u'eierably cylindrical in cross section. This work supporting arm projects toward the over-hanging arm and the free end thereof is substantially beneath the free end of the overhanging arm, so that the looper mechanism which cooperates with the needles may be located in this arm. The horizontal 'arm carries a rotating shaft which is operated from the main shaft in the standard and the loopers are operated from the rotatingshattin the horizontal arm. Also located in the Work supporting arm is a differential feeding mechanism which is operated by suitable mechanism from the rotating shaft in the horizontal arm. A trimmer is carried by the overhanging arm and operates to prepare the fabric edges for the stitching mechanism. The fabric has its edges brought together on the upper side of the work supporting arm and the feeding mechanism operates to feed the joined edges off from the arm. The said edges are fed tothe trimming mechanism Where they are trimmed and.; hey arar then brought into abutted relatie lftoneac` f other and joined by the stitehin /mecha ism.;

The stitching mechanism consistsfof two pairsol" spaced needles, one pair being in rear of the other. 'There is a looper for each pair of needles Within the work supporting arm and thread laying devices for each pair of needles carried by the overhanging arm, soy that the` stitching mechanism forms in effect two independent lines of needle loops which are connected above (iis and below the fabric, and these pairso 1 I needlesfare so arranged that the connectin threads 'of the needle loops of one pair o needlesjoverlies in part or in whole the connecting threads of the needle loops o 'f the other set of needles.

Work supporting mechanism.

lReferring more in detail to the drawings, my improved-sewing machine consists of a standardl, which is carried by a supportingl base 2. 0n this standard is mounted an overhanging arm 3. Within the standard i1 is the main .operating shaft 4, which is drawings, the arm 6, projects outwardly in a plane substantially at right angles to a plane containing the overhanging arm 3. The horizontal arni'7 at its free end carries a depending arm 8, the dependin arm at its lower end carrying the cylin rical work supporting` arm 9. This cylindrical work supporting armi) projects forwardly from` the depending arm 8 to a point substantially.

underneath the free end of theoverhanging arm 3. i v

My machine is especially adapted fol' stitching.;r the edges of fabric to form tubular articles. Ii'he fabric having, the edges to be Ijoined is placedunderneath the cylindrical work supporting arm 9and the edgesn are brought up around each side of the armt until they meet at the upper side of said arm. The horizontal arm 7 is located some dis tance above the base 2` or the table on which.

`said base rests, and this alfords a space for the arm ofthe operator so that' the fabric I l' may he readily placed around the cylindrical work supporting arm 9 and properly guided to the stitch forming mechanism.-

Stitchr forming mechanism.

At the forward Vend of 4the overhangin'g nrm 3 is a supporting head 10 in which vreciprocates a needle har 11 carrying, as here- .in shown, four needles. The needles 12 and E13 form one pair of needles, while thee needles 14 and l5 -iorm another pair. The needle har llis reciprocated by a needle lever lf3 which is pivoted at 17 to the overhanging: arm and is oscillated by a link 1S coiperating with an eccentric on the main shaft 4. The needle lever at its outer end is connected hy a link 19 with the needle .har l1.

shaft 23 is mounted to oscillate in suitable bearings 24 and 25 located within the Work supporting arm. The lopper carrying head 22, as clearly shown in Hg. 23, has a projecting stud 26, on which is clamped an auxiliary-looper carrier 27. The looper 2l is mounted in a suitable socket 28 inthe carrier 2l'. While the looper 20 is mounted in a suitable socket 29 in the looper carrier- 22, and is locked in position by a set screw 20 which extends throughthe stud'26. The looper carrier 22 is cut away, as at 30 to form a clearance space for the needles. 'llhis construction permits either looper to be removed without affecting the other looper, and also permits of the looper being succes sively adjusted relative to the respective pairs of needles. The carrier 2? can be moved about and along the stud 26.

As above noted there is a separate loo er which cooperates with each pair. of need es, und, therefore, the needle loops oi` one pair of'needles will he joined beneath the material by a looper thread which serves not only to lock the needle loops but also to connect the needle loops across the Vmeeting edges of the sections of fabric to be joined, as will be hereinafter more fully disclosed.

The looper shaft 23 extends lengthwise of the work supporting;r arm to a point within the lower end of the depending arm 8. shaft 31 is mounted to rotate in suitable hearings in the horizontal arm 7. This shaft is connected by two

operatincr links

32 and 33 with the main shaft 4. 6u said main shaft fl! are two staggered cranks` while the shaft 31` also has two staggered cranks. and, therefore, these links will oper ate to impart a positive rotation to the shaft 3l from the shaft 4. 0n the outer end of the shaft 3l is a. crank piu 34 to which is connected a link 35. This link 35 atY its loivcr end is pivoted to a crank arm 36 rigid with the end of the looper shaft 23. The said link 35 is pivoted to a rod 37 at 38 and this rod 37 slides in a 'sleeve 39 which sleeve is mounted Aon an oscillating support 40. The axis of the oscillating support 40 is at right angles to the plane of movement 'of the rod 37. As the link 35 moves u and down, this rod becomes a movable fullnnm for the link 35 and in effect converts the link into a lever fulcrumed between its ends, so that the 'link 35 imparts not only an oscillatina` movement to the looper supporting.,r shaft V23, hht also ah endwise movement thereto. The loopers are Aby this mechanism moved Yinto their needle loops, then given a sidewise orV lateral `needle avoidingv movement, after which they are retracted to shed their needle loops and then again moved laterally for entry of the'next needle loops. This looper mechanism per Re forms no part of the invention and further description thereof is not thought necessary.

f pair ot' needles is l forward. as shown in Fi .it the lower end of the needle bar 11 is a needle clump For supporting and positioning the needles. Said needle clamp consists oi' e needle head +11, which is clam ed to the lower end oi' the needle bar 11. TPhe needle 1; is mounted in said needle head and held therein b v a set screw 42, see igs. 24 to 29. The needle 13 is located 1n tlie lower end of the needle bar and is held therein by a set sez-ew 43. The needle 13 has its point raised above the point of the needle 12, as in the well known manner where the needles are n idely spaced and a single looper co erates with both needles. The needle 14 of t e rear mounted in the needle head il and is held therein by a, set Screw 1+i. Directly above the needle head 41 is a collar 45 which. is also secured to the needle har and this collar serves as a stop for vertically positioning the needle 14. The needle l is also carried b f the needle head 41and a set screw 46 holds the same in place. A projecting lug 47 on the collar 45 determines the lvertical position of this needle 15. Said needle is set With its point somenhat above the needle 14, for reasons above stated.

` .Xs clearly shown in Figs. 17 to 19, inclu` sive, each pair of needles has separate thread laying devices co erating with the same :dime the fabric. lJn Fig. 17, the fabric is indicated at F. The meeting edges of the two sections of f-.lbric to be joined are indinrell et f. A thread o, is uided by a thread guiding linger 48 and t e thread is laid hoek end forth so as to be stitched'to the fabric by the needle threads carried by the

respective needles

12 and 13. A second thread L is carried by a thread uidin finlii and this thread is laid baer and orth on die opper 'face of the fabric and joined limoni 'oy the threads of the respective needles il and 15. The

thread fingers

48 and 49 ien e movement in a direction substantially parallel with the line of `feed. Coperatin with the thread finger 48 is a thread hoog Jil, while a thread hook 51 cooperates with 1h." thread finger 4l). The thread lingers 48 :and Alll ire brought to the position shown in Fig. 17. and then the thread hooks move 18, engaging the ilu-ends o and respectively, and forming loops, as shown in Fig. 19, 'between the .sir/[nds oi' which the respective needles 12 and 1l pass, the threads of course passing mehr ille raised

needles

13 and 15.

'linee thread hooks 50 and 51. are carried an :we 52. Said hooks are adjustabl ii ...il to the arm for lateral and vertical a ilrwmonls. und said arm is pivoted at 53 berri-wn suitable spaced supporting lugs proieving Yfrom a bracket 54 which is attached lo the supporting head yon the overhanging arm. The pivotal point 53 is considerably lo wwof the needle bar. The thread hooks:

are lixed to the arm 52 and are so positioned that, when the arm swings about the pivotal point 53 the hook 50 Will pass in front of the

needles

12 and 13, While the hook 51 passes between the pairs of needies-that is, in rear of the

needles

12 and 13 and in front of the

needles

14 and 15. The erm 52, as herein shown, is integral with an arm *55. At the rear of the mahine, as clearly shown in Fig. 2, there isa rock shaft '56 which

bearings

57 and 58. This shaft 56 is oscillated by a link 59 which coperates with an eccentric on the main shaft 14., see Fi 4. Loosely mounted on the shaft 56, but eld from endwise movement thereon, is a sleeve 60. This sleeve carries a downwardly projecting arm 61, end to a link 62, see Fig. 13, and this link 62 is in turn pivoted. to an arm 63 teleseo ing Within the arm and clamped therein by a screw 64. Also mounted on the shaft 56 is a second sleeve 65, which is likewise loose on the shaft, but held from endwise movement thereon. 4In other words, the shaft 56 is merely a bearing support for the sleeves and 65 and the movement of the shaft 66 is in no wise imparted to these sleeves. The sleeve has a forwardly projecting arm 67 see Fig. 1. This arm at its outer end is pivoted to a link 68, which in turn is pivoted to a rhall stud fixed at 69 to the needle lever 16. This ball stud is on the rear face of the needle lever and the overhanging arm is provided with a recess 70 to permit free oscillation of the needle lever. As the needle lever oscillates, the sleeve 65 will be oscillated on the supporting shaft 56 therefor. The sleeve 65 has a second arm 71, which `projects downwardly therefrom, while the sleeve il() likewise has a downwardly projecting arm 72. The arm 71 carries a spring-pressed plunger' Til, see Figs. 15 and 16. This plunger is formed with a hand-piece 74 and a spring 7 5 is housed in the arm 71 which normally forces the )innger toward the arm 72. The arm 2 is formed with a tapered recess 73" to receive the tapered end of the plunger, thus providing means for taking up any Wear and there by prevent any loose movement. Said arm is alsov formed with laterally projecting spacedribs Til-76. The purpose of this detachable connection between the

arms

71 and 72 is to permitthe sleeve 60 to he disconnected from its oscillating n1echanism,'sp that the thread hooks oscillated b this sleeve may be moved 1' a limited d1stance away from the needles.; IThis is for the purpose of giving access to the iff-elles for threading or renewing. lf the machine should be started with these parte disconnected, the arm 1 will he rocked and the spring plungetV vill be forced into the socket or opening in the arm 72 as soon as it cornes is mounted to oscillate in.

which is pivoted at its lower i into register with the plunger and, therefore, the partsl will be automatically connected on the starting of the machine.

The thread fingers-mand 49 are carried at the lower end of a lever T6' and are held in place by suitable clamping means, The lever 76 is pivoted to "a bracket arm 7T at its lower end and this bracket arm TT may be formed as a part of the bracket 54 which Supports the thread hooks. Said lever 76 is connected to a link 78 and this link 78 is in turn connected to a downwardly projecting arm 79 see F ig. 3, mountedon the cross shaft 56. -As the cross shaft 56 oscillates the arm 79 will be'moved back and forth and this will swing the lever TG in a plane substantially parallel with the line of feed. The thread fingers. therefore, move ina.' direction substantially at right angles tothe direction of movement of the thread hooks` andsthis enables the threads carried by the iruiding fingers to be properly positioned for the thread hooks and also to coperate with the thread vhooks in properly laying the Vcross threads relative to the needles. The threads for the .needles are led from the supply through suitable tensions T mounted on a bracket. 8() and thence through guides to the needles. The threads are not shown in the drawings. The tensions may be released by a suitable releasing arm 81. which is operated `from the presser foot lift ing mechanism.

In Figs. 33 to 38 inclusive I have shown a modified form of stitch forming mechanism. 'In this form of the invention the needles l2 a d' 13 forming the front pair of needles are'widely spaced while the needles 14a and 15 which form the rear pair oh needles are comparatively closely spaced.

"Fach ,of the rear pair of needles is set in a linev which is parallel of the line of feed and passes between the front pair of needles.

while a looper 21 coipe'rates with the rearY Coperating with the

needles

12 and 13 beneath the Work support is a` looper 20 pair of needles i4 andpl.

The needles i4 and .15 being very closely spaced are also provided with a loop. r'etaiiier 2l". This loop retainer has a projecting' finger 9i which is adapted to cooperate with the loiper 2l and hold the needle loops formediiu the threads of the needles 14a and l5 spaced as shown in Fig. 514. which permits the needle l5 to pass between the. needle loops. This loop retainer is of the well known construction and further description thereof is not thought necessary. 'Said loop retainer is mounted inthe bearinglsupport on the front end of the vork supporting arm 9.

The loopers 20 and 2l are mounted in the same manner as above described in cony Iiertion with Figs. and 23.

' presser bar.

Trimming mechanism.

The sections of fabrieF, as clearly shown in Fig. 17, when .'oined have-their edges abutted, so as to ma e a flat seam. In order to prepare ,the edges, so that they may be abutted, I have provided a trimming meeh anism which consists of a stationary trim ming blade 82 and an oscillatingtrlmming blade 83. The oscillating trimming blade is clamped to an arm 84. Thisrarm 84 is in turn clamped to an extended bearing 85 on the lower end ofthe yoke 86, see! Fig.

32. This yoke 86, is mounted on the presser bar so as to oscillate about the axis of the Said yoke has two spaced bearings through which the presser b'ar passes and one, of the arms is connected to this extended bearing 85. A spring 87 surrounds the presser bar and forces the yoke downward along; said presser bar so as to hold the movable trimmer blade in `shearing Contact with the stationary trimming blade 82. Said movable blade has a projecting part at the rear side thereof which continuously overlaps the stationary blade. The yoke SG has a forwardly rojeeting arm S8 which carries a hull stud) which is pivotallyy connected to av link 89, see Fig. 4. This link 89 is pivoted at 90 to a rocklever 91 which is mounted on 'a suitable bracket 92 carried by the standard. The other arm ot' the roek leverV is pivoted to alink 93 which in turn is pivoted to a'ball stud 94 carried by the needle lever. As the needle lever is ostiilated the link 89 will impart oscillations to the yoke S6 and this will in turn oscillate they movable ltrimming blade..

The" movable ,trimming blade 82 is carried .by the presser' foot and. tiierel'ore. both y trimmed said edges are abutted and directed to the stitching mechanism. The trimmed ofi' strip is guided away from the stitching mechanism b v a strip delieetor. This strip deflector is provided with a fixed section 9G which is secured to the presser toot and spans the slot through which the edges of the fabric are guided. A section 9T is carried by a movable arm 98 which is pivoted to a lng 99 on the presser foot. A spring 10U carried by the arm 98 bears against n square shoulder on this lug 99 and serves to hold this movable section of the strip delieetor in the full iine position shown in Fig. 30 or in dotted line position shown in Fig. 13. The purpose of this movable section of the strip defieoini is to give access to the needles for threading or renewing.

Presser foot mechanism.

The presser toot 101 is carried by the presser har 109. on which the `yoke S6, above described. is mounted. This presser han' is mounted to slide in the snpiiorting head of the overlianging anni and may he raised either h5 the hand lever or by '.1 lever 101 which is connected to n suitable trendle. This presser foot hns two needle openings 105 and 106. The needle opening 105 is for the needles 11 und 15. while the needle opening 10G is for the needles 1.3 and 15S. 'l were is n stitch tongue 10T Carried h v the presser foot und projecting into enel; needle open ing. This stitch tongue extends between the needles und the thi-ends a and 5 :ire luid across the respectivo stitch tongues :1 nd slide olf from the saune in n. well known way.'

The stationary trimmer 8:2 is mounted in ri groove in the presser loot und is Clznnped therein by suitable mechanism. The presser font is Formed in two tions. n fixed sew tien 111% .fin-l :i yield' C section lilik see 151g. Ill), This yielding sei-lion moves bodily 11p-:ind down it one sidix oi' the lifted sev tion und :i sililnhle sp1-ing 11() noi-madly holds said yielding section on the fzilnie. There :i spnc'e between the sections 10H :1nd lili! est the torwznd end whirl: provides n gniding l'lninnel 111 for the nptnrned edges of the hdn'io seeiions whirl] :ire to he irinnned. The lined section 9U o1' ille strip defini-tor is secured to the lixnd svetion nl' the presser tool :ind merely reels against nn np turned lug 11:50u the .Inomhli- .wl ion ol' the presser ioni. This fixed section o1' the strip 11911111.1111' is nlm spnllll sllg'llllj' :lleno Lin' nnnnlile sei'tion ol' the presi-v1 font. so that' mid lnovrdilo .sefiion muy Vivid in :in upward direetion. The purpose ot this niovnllle see-- lion of the presser Forli is to permit :en edge having n i-ross sonni. or ni' more than one ihielness. to in; properly held while il is lieing stitfhed to :in edge oi n :single thic'kness ;..l.s-ing beneath the presser foot.

Tfr/ont More.

Dil-eel l v beneath the presser foot und enrried h v the work' sinipoiting erin 9 is a throat plate 113. This thi-ont plate is secured to the work supporting arm hy suitable screws 114. Seid throat plate is provided with feed slots 115 and with openings for the needles. The openings 117 are for' the

needles

12 and 13 and the o )enings 116 are for the

needles

14 and 15. v etween the needle o enings for each set of needles there tongue 118. The needle o )enings of the need e openings 11.7 so that there is a solid portion of hroet plate which supports the rear stitch tongue 118.'

he louper threads which join the needle loops beneath the work support are laid across the respective stitch tongues und are fed oil' the ends of the sinne. lt will he noted that these openings for the needles in the throat plate and also the openings in the presser 'foot are :1i-ranged so that the pairs of needles at the rear are slightly offset relais live to the pair of needles in front. the pening 116 for needle 11 being disposed in a plane extending between the openings 11 T. This results in the formation of the seam shown in Fig. 17. The front needles forni what might he Called :i separate and inde pendent seam from that formed by the reni' needles. The needle 13 enters the sections of tabl-ie eloser to the meeting edges f than the needle 12, and likewise the needle 14; enters on the other side of the meeting edges substantially' the same distance from the meeting edges ns the needle 13, While the needle is on the other side and substantially the sume distance from the meeting edges :is the needle 12. l

.is shove noted. the pairs ot' needles are positioned one in reni* of the other. and there nre independent oo el'ating elements 'for eneh pnr oi needles. he stitches formed h v the needles 14 und 15 overlap the stitches formed hy the needles 12 und r he notering and joining stitches, therefore. have nnvhoring loops located :it some distnnf-e hawk from the meeting edges and @ov-- ez-ing flu-ends which cross the meeting edges :ind extend lengthwise of the meeting edges :it points ndjzwent sind meetiner edges.

ln Fig. 35 of the drawing have shown n tln'ont plate 113" which is ada )ted for the .stitching ineehanism shown in ILigs. 33. and IH. Suid thront plate is also provided with nn opening 116n for the needles 12 :ind 13a sind a, stiff-h tongue 1155a carried by the throat plete projects between the needles into these openings. Seid throat plete has :In opening 14g for the needles 14 :md L13n and n stitch tongue 118*l carried by the throat plete projects into this needle opening. This rear stitch tongue may be omitted if desired.

Feeding mechanism.

The fabric sections to he joined are fed to the stitching mechanism by a feeding meehanism which consists of a main feed dog d an auxiliary feed do `120. The main feed dog is carried by a eed bar 1215 screw 123. The main feed bar 121 is located in the work supportingarm V9 and extends substantially from end to end thereof. Said feed bar betweenv its ends is pivoted to a forked arm 124. Said arm is mounted on a Sleeve 126 having an eccentrically positioned opening therethrough which receives. the bearing pin 128. Said pin is locked to the work supporting arm by a screw 129. `By loosening this screw and turning the pin by a. tool in the slot 130, the sleeve which is keyed to the pin can he rotated and thus the feed bar raised or lowered. The rear end of the main feed bar 121 is in the form of a yoke having two

arms

131 and 132, see Fig. 21. These arms straddle4 the louper shaft 23, which also passes through the forked arm 124. The .

arms

131 and 132 are pivoted to 'a lever 133.' This lever engages an eccentric 134 at its up er end and the eccentric 134 is carried liy the rotating shaft 31 in the horizontal arm. This eccentric carries the crank pin 34 of the loo er operating mechanism. The lever 133 is ulcivumed on a pin 135'. -This pin is carried by a second lever 13G which is -fulcrumcd on a vertically adjustable pin 137 carried by the depending arm 8. The upper end of the lever 136 has a forked engagernen*t jith a block 13S. which in tum coperates with an eccentric 139. fixed on shaft 31, see Fi". 10. The pin 137 extends into a fnlcruni block 140 which is adapted to have slidirig engagement in a slot in the lcver'-136. .\s.the

shaft 31 rotates the eccentric 134 will bodily ed to the feed bar is. therefore. au up and down movement and a longitudinal niovenient. ln other words. the main feed dog will be raised into engagement with the fabric` will inove 'forward to leed thc fabric, will then drop l'roni 4engage'mcnt with the fabric and be retracted for thc next feeding movement. l

The ba r 122 which carries the auxiliary feed dog 12|) is slidabl'v mounted in .a groove or recess 142 in the main feed bar 121. The up and down movements, therefore. of the main feed bar willbe imparted to this auxiliary feed Tau'. Said auxili'arv feed bar may be given a differential feeding movement relative to the main feed bar `through the following mechanism. A link 143 is pivoted at 144 to the auxiliary feed bar 122, see Fig. 5. The other end of this link is pivotedat 145 to a rock arm 146, which inturn is mounted at 147 in bearings carried b the work supportin farm 9. A link 148 is pivoted at 149 to a ug 150, carried by the main feed bar 121, and the other und of this link 148 is pivoted at 151 to a block which slides in a se mental groove 152 in the' rock arm 146. y y shifting the link 148. so as to vary the pivotal connection of the link with the rock arm, the oscilla tion of therock arm, due to the bodily movement of the link 14S, travelinvI with the main feed bar, may be varied. The oscillations of the rock arm`146 are imparted` throuvh the link 143 tothe auxiliary feed bar. T e link 148 is shifted b a hand lever 153 which is connected by a hnk 154 to said link 148. This hand lever is fulerumed on the work supporting arm and at its rear end is connected to a stud 155 which projects through a slot 156 in the arm of the machine. On the outer faceof the work arm there is a serrated plate 157 which is secured to the arm by suitable screws 158. The stud 155 carries a hand 'piece 159 which is pressed by a spring 160 into contact with the serrated plate 157 and the serrations serve to lock the stud in an adjusted position. The hand piece, however, may be moved out of engagement with the serrated plate and the lever shifted in order to vary the position of the link 148 and thus vary the stroke of the auxiliary feed dog.

It will be understood thatI there are snitable removable cover plates for various portions of the arms which contain the mechanisms for operating the loopcr and the feed, but these cover plates have not been dei.scribed in detail. lt will also be understood that there are suitable thread controlling devices for the looper threads which are indicated generally at L and L' see Fig. l. There is also a thread clamp for the looper thread indicated at (l. this figure.

ln Fig. 3R of the drawingl l have shown two sections of fabric indicated at F which are joined by in v improved scam made on the stitch forming mechanism .shown in Figs. 33 toB inclusive. The front pair of needles are indicated in 'this ligure at 12 and 13a whih` the rear pair of needles are indicated at 14 and 15, The cross thread n is laid back and forth about the needles i12 and 13`vihile the cross thread 7; is laid back and forth about the needles 14u and 15.

(ll/million.

ln the operation of my machine. the fabric sections to be joined are guided underneath the horizontal arm T; the o icvator reaching beneath the arm guides tlic sections of the article about the work supportinf.r arm 9. so that the edges to be joinedwill be directed into the receiving channel ol" the presser foot. The feeding mecha- ,.lisn) opt-initieel upon these Sections und prei: ne the nnfirst to the trimming mechanizen, ivhere the, "e1-tieni edges are trimmed, and thenre to the stitching mechanism Where :seid edges are nl ntte lfind joined by the stitrhinfg threads. The auxiliary feed den' is preferuhlj; so 'clnlirolled :is to operate upon the .nniterinl ut a. slightly greater 'perfl than the 11min leed. dog `which gnthers in the materiel enllicientlyv to prevent j etohing the genie when operating upon istie or knit material. The edges after they me trimmed are first joined by the needle threee ot' llnneedles l2 and 13, ioALether with the renner-ting' threads. whirl), i' srrilied idiom, mooiste of the looper thread helma' and the L''ose thread above. lter the edges have been joined, thgLu are Uien, pz'eeenied to the seeond pair oi' needles wLuge the lil-:lees are again joined by the needle ihre-nde together with the connecting louper three-il :and Moss thread und this mir of rxr-edles is so positioned that the resulting' linee` of etitfjiing overlap, that is, the (wie thread and ,louper thread of the mir nlI air-edlen.. overlie in part or l timeoverlap the looper thread 1 ein :hrend of the Afront pair of needles on' hereliy forms .-i Ver); strong and dnrn- Het -iezin'i whirh eonneets and covers the e il the motorini.

:hfl* l1 in the horizontal member is ,irm'hled with e mind wheel 161. which lirwilitiites the tartine of the machine hv 'he operator who site. in front of the hori- :aoniol firm. Vhen this hand wheel 161 is tnrned it not only rotates the shaft 31, but through the connecting

links

32 and 33 will rotate the mein shaft and start the Sellin'. 'k

lt is: olnious that minor elmnges in the ii-mile of rontrnetion and arrangement of wmf. 'f mrtienhtrljv the position of the needless. only be lne-le without departing' trom the spirit of the invention :is set forth in the appended rlaiins.

lfeviog thus ries-vrille] what l rlniin :in new :im desire to Serure hv Letters Potent. is:

l. The;eoi'nhinntion oi :L standard, :in overlnunjiiig: :lrin rorried thereby, a. needle lor rerlgirorziting in seid, overlnmging arm, und ,l needle married by ,said needle bar, an i'nitwardly and upwardly mm the mandami. :l depending arm supvoted in' seid hist named .'o'in, und a work eiiiporring zii-n1 rariied it the lower end nl' :miel depending erm und having its free rnd @tending underneath the free end'of seid overh'nffing drm. l The, Forniinolion of a standard, an overlienging arm rerried thereby. o needle *our reeiinoceting in saidoverhe-nging arm,

my invention,

Lesesaal and a needle earried by seid needle her. :in arm projecting outwardly end nimma-diy from the standard, a depending erm sul ported by Suid last lnnned arm. :l work sogportinff arm carried at the lower end of said depending arm and having' its free end e.\- tending underneath the free end ot' mio', overhanging arm, a looper mounted in the free end of s-,Lid work supporting; erin, and means extending through said :nine` pio jerting from the standard for operating said looper.

3. The Combination ol :i Standard, :in overhanging armnrried therein'. i needle hun' reoiproonting` in Suid overltengingf erin, and a needle carried by said needle imi', :in arm projectingr outwardly and npivzniliif from the Standard, :i depending erin mijn ported by :said last named erin. n work my portingr arm carried at the lower end oi said depending erin and haring its free end attendingr underneath the free end of said overhang-ing arm, a lei-iper mounted in the free end of said Work supporting erin, menne enrolling through said :mns projecting from the standard for operating' Said looper, a feed dog carried hy' said work supportingr erin and disposed so ne to fer-l the Work oil" from the end of the arm, and means extending through said urinei .Sno ported by the standard for operating said feed dog.

l. The combination of :i standard. on overhnnging arm carried ,by said :Standard a needle bar reciprocating in seid overhang" ing,r arm, and ar needle carried by seid needle, har. on arm carried by the standard sind pro jerting outwardly and upwardly therefrom, :L horizontal arm. parallel with the oven hanging erm and carried by seid erin pro-- jectin from the standard, nv depending non carrie ,by said horizontal erin :it the free end thereof, and a Work supporting erin c'arried attl1e lower end of seid de'ieniling; erm :ind'hnving its free end extending' un derneath the free end oi the merlninging arm.

The `combination of fi overhonging arm carried by a needle bar reciprocating in Sai-.l overhang. ing arm, and a needle carried by Said needle bei'. an arm carried by the .standard and projecting' outwardly and upwardly there from, a horizontal arm parallel wit-i1 the overlmnging arm end carried by mid anni projerting from the standard, a depending arm carried by Said horizontal iirni at the free end thereof. a work snl'iporting erm Carried at the lower end of said depending' arm and having its free end extending nnderneath the free end of the, overhanging arm, nlooper mounted Within the free end of said Work Supportingfafm sind, egpey-ai-,- ing with said needle, and means extenofng liti through said arms supported by the standard for operating said looper.

(i. The combination of' a standard, a overhanging arm carried by said standard, a needle bar reciprocating in said overhan ing arm, and a needle carried by said need e bar. an arm carried by the standard and projecting outwardly and 4upwardly therefrom. a horizontal arm parallel With the overhanging arm and carried by Said arm projecting from the standard, a depending arm carried by said horizontal arm at the free end thereof, a work supporting arm carried at the lower end of said depending arm and having its free end extending underneath the free end of 'the 'overhangin arrn` a looper mounted within the free en ofsaid work supporting arm and coperat-A ing with said needle, means extending through said arms supported by the standard for operating said looper, a feed dog at tlie free end of said Work supporting arm arranged for feeding the-material o from the arm. and means extending through said arms supported by the standard for operating'said feed dog.

7. The combination with 'a standard, an overhanging arm carried thereby,xa needle bar reciprocating in said overhanging arm, a needle mounted on said needle bar. an

arm carried by said standard and projecting outwardly and upwardly therefrom, a horizontal arm carried at the outer :free end of said projecting arm, a. main shaft inv said standard, la shaft in said horizontal arm, and means for. positively rotating the shaft in the horizontal arm from theshaft in the standard, an arm depending from the outer end of the horizontal arm, a work supporting arm carried at the lower end of said depending 'arm and having its free end extending underneath the free enrd of the overhanging arm, complementa] stitch forming mechanism located within said work supporting arm, and means for operating the same from said rotating shaft in the horizontal arm.

8. The combination with a standard, an overhanging arm carried thereby, a needle bar reciprocatingv in saidoverhanging arm,

a needle mounted on said needle bar, an arm carried by said'sta-ndard and projecting outwardly and'upwardly therefrom, a horizontal arm carried at the outer free end of said projecting arm, a main shaft in said standard,` a shaft in said horizontal arm,

and means for positively rotating the shaft A in the horizontal arm from the shaftin the standard, an arm de ending from the outer end of the horizonte arm; a work supporting arm carried at the. lower end of said depending arm and having vitsfreo end extendpg underneath the free end .of the over-`V hangmg arm, complementari stitch forming rfor operating said main feedi mechanism located within said work snpporting arm, means for; operating the same p from said rotating shaft in the horizontal arm. a feed dog at the Afree end of said work supporting arm, and means for. operating said feedV doo from said rotating shaft in' the horizonte arm.

supportingarm carried at the lower end of said depending arm and having its free end extending underneath the free end of the orerhanging arm, complemental stitch forming mechanism located within said work supporting arm, means for operating the saine from said rotating shaft in the horizontal arm, a mai-n feed dog at the free end of said work supporting arm,

means for operating said main feed dog from said' rotating shaft, an auxiliary feed dog at the free end of said work supporting arm, and meansV forgiving said auxiliary feed dog a differential feedingV movement. y Y

lll. The combination with a standard, an overhanging arm carried thereby, a needle barl reciprocating in said overhanging arm, needles mounted on said needle bar, an arm carried by said standard and projecting outwardly and upwardly therefrom, a horizontal arm carried at the outer free end' of said projecting arm, a main shaft'in said standard, a shaft in said horizontal arm and means for positively rotating the shaft in the horizontal. arm from the shaft in the standard, an arm depending from the outer end of the horizontal arm, a work supporting arm carriedat the lower end of said depending ann and haring` its free end extending underneath the end of the overhanging ar'm, complemental stitch forming mechanism located within said work supporting arm, means foiroperating the same from said rotating shaft in the horizontal arm,a main feed dog'at the free end of said work supportin arm, means rotating: shaft, an auxiliary feed dog at thefree end of said? worksap'porting arm,l and means. for giving said auxiliarjr ined dog a differential feeding movexnen moans for operating. the auikilaiiliyl y adjustabe at the vrill-n :t

u hereby the dflereutird throrv oi seid iced log muy be Varie-(L ll` The conililnution with u standard, un overhnngnnf umn carried thereby, 'f1 needle bnr reeiproouting in said overhanging erin, tuo gni" i' spared needles enrried by said neellie nurA one mir being arranged in rear of the otherz n work supporting arm extend ing in u .lirection at right angles to the pinne of the overhnnging arm and having its free end underneath the free end of the ovcrhanging erm, means for suspendingr seid work supporting.: erm, whereby there is u free space underneath and et the sides ol' the sume from end to end thereof, a looper shaft extending longitudinally oi' seid Work supporting; arm,.two loopers on smid shaft, one for each pair of needles` und means operating through said suspendingA means for oseilleting seid looper shaft.

l2. The rombinstion with e standard. en orerl'mnging ar'rn carried thereby, a needle bar wriproeating in seid over-hanging :um` two pairs of spared needles carried by said needle bar, one 'pair being* arrsngedin rear of the other, u work supporting, arm extending in fr direction et right angles to the pinne of the overhunging erm and. havingr its free end underneath the free end of the overlnlnfing erm, means for suspending said work supporting arm, whereby there is u free space underneath and at the sides oi' the same from end to end thereof, a louper shaft extending longitudinally of said Work supporting arm, two loopers on said shaft, one for each pair of needles,

means operating through said suspending means for oscillating said looper shaft. a renin feeddm'gs :1 feed bnr located Within said nor-k supporting arm, and supporting suii eed dog. und means operating through said suspending means for actuating the feed lmr. t l

13. The Combination with au standard, on overwinning arm carried thereby, aneedle bur m-iprocetingf in said overhang'ing arm. two noirs of spared needles carried by said neednbn 1; one pair being,lr arrnged in rem'V oi' thv other. n work supporting,` :irmextending in L llirectigm at right angles to the plone oi' the o\i;=.h:1nging arm and having its irl-s curl nnderneuth the free end of the overlmnging erm. means for suspending said work .sufnlortng arm, whereby there is a free eprice underneath and at the sides nl the saune from end. to end thereof. aA louper shaft esending' longitudinally of4 said work supporting arm, twos looperson sind `@hehe one 'for each pair of needles, ineens operuting through said suspending means for oscleiing sfnelooper shaft, a

moin food flog; s feed berloeatefi within said work supporting erm,L and supporting seid ire-.l dog. means opersing through solo' suspending ineens forL actuating the feed hun un, auxiliary feed dog :et the free end oi suiel work supporting arm, und ineens i'or ji\in said auxiliair); feed dog a differential movement from the feed bur of the umili iced dog.

ll. The combination ol' :i standard. :1n owrbanginif :nin lurried ily smid stundard, n needle brr reciprocating in. the outer end of said Work supporting urn). two pairs of spaced needles, one pair being arranged in rear of the other and curried by said needle ber, u work supporting erin ioeeted in e line et right angles to the plane of the overhunging arm. means for suspending seid Work supporting urln, whereby there is a Atree spare underneath the sides thereof from 'end to end of said work supportino arm,

complemented stitch forming: mec lanism located Within said work supporting erm. feeding mechanism carried by seid Worl supporting arm, trimming 'rneohanisnl located in front of said needles and includingr :i` movelfle trimmingv elude operating in a horizontal plane for prepari-ing the edges of the 'fabric lo be stitched by the needles.

15. The combination of e standard. en overhanging erm eerried by seid standard, n needle bar reciprocating in the outer end of said work. supporting erm, tiro pairs of spaced needles, one pair being; arranged. 'in rear of the other and carried by said needle ber, e work supporting arm loented in a line at right angles to the. plane of the over hanging arm, means for suspending seid work supporting arm, whereby there is "a free spese underneath the side thereof from end to end of said work supporting arm, coznplementsl stiteh forming mechanism located Within said Work supporting arm, feeding mechanism carried by said work suppm'ting erm, trimming mechanism lo cated in front of said needles and includingV1 e movable trimming blade operating in a horizontal plane for preparing the edges of the fabric to be stitched by the needlese presser foot, and a deflector carried by the presser foot for guiding' the trimmed oil' Strip away from the needles.

1G. A sewing machine, including in combination, two pairs of gspneed needles, a` threaded looper for each pair of needles, one pair of needles being arranged in rearl of the other pair, the needles of onepnl beingF 'offset relative to the needles of the other pei' and thread laying devices for each pairof needles, said pairs of needles being sofdisposed that the loops inthe looper t eed of the looper cooperating with Athe rear;I pair of needles overlie the' loops formedin the looper threeii by the looper eogerefing with front panol needles.

s sewing machine including in coin-` binntion, wo miss of' spaced needles, :t Looper 1for envi pair of needles. one puir of needles being arranged in rear of he other.

the needles of one pair being offset relative