US949729A - Sewing-machine. - Google Patents

Description

5.9. GREENE 9 L. E. A. E'UEHNEE.

SEWING MACHINE.

APPLICATION FILED MAY 29, 1909 Patented Feb. 15, 1910.

2 SEEETS-SHEET l.

lllllll Emlmw ATTORNEY llllll WITNESSES:

J. G. GREENE & L. E. A. BUGHNER. SEWING MACHINE. APPLICATION FILED MAY 29, 1909.

Patented Feb. 15,1910.

2 SHEfiTS-SHEBT 2.

WITNESSES external 1 earns itm;e1a

Fl l@a JAMES G. GREENE AND LOUIS F. A. BI TCHNER, OF ELIZABETH, NEH/V JERSEY, AS-

SIGNORS TO THE SINGER MANUFACTURING JERSEY.

COMPANY, A CORPORATION OF NEW SEWIN G-MACHIN E.

Specification of Letters Patent.

Patented Feb. 15, 1910;

Application filed May 29, 1909. Serial No. 499,076.

fornnng mechanism, and it has for its principal object to provide needle-jogging mechanism which shall be simple and effective in operation and capable of accurately controlling the lateral position of the needle to insure uniformity in the alinement of the needle punctures along opposite sides 'Of a buttonholc.

In its preferred form the improvement is cn'ibodied in a buttonhole stitching machine of that class comprising stitch-forming mechanism mounted for effecting a semirotation in stitching'the rounded end of an eyelet buttonh'ole in conjunction with a traveling non-rotary work-clamp; and it comprises a rctdilimrarly reciprocating needlebar journalcd in and adapted to partake of the circular movements of an oscillatory bearing sleeve or bushing mounted. in the sewing machine "frame. The needle-bar is provided with a fulcrum parallel with its 'direction of reciprocatioin upon which is mounted a swinging needle-clamp block carrying a parallel guide-rial embraced by a guideblock pivotally sup iiorted upon a depending arm of an elbow jog-lever fulcromed upon said bcarin sleeve and having a lateral arm connected by means of a link with a substantially parallel swinging arm also fulcrumed upon said bearing sleeve. The said link is provided with an grooved ring embracing the needle-bar and entered by a roller-stud of an actuating rock-lcrer deriving its operative movementsfrom connections with the main-shaft of the machine, the to-and-fro movements of the link derived from said rock-lever being communicated to the jog- ,lever to impart the sidewise movements to the needle. The rock-lever actuated by a cam serv ng to maintain the same stationary exceptingwhile the point of the needle is above the work, when it serves. to impart the sidewise movements to the needle alter nately in opposite directions.

In the accompanying drawings, Figure 160 is a perspective view of the frame of a buttonhole stitching machine provided with stitch-forming mechanism embodying the present improvements, and omitting certain other parts of the mechanism.

perspective view,-from another viewpoint,

.of the needle-bar and its rotating and jog.

ging means, and Fig. 3 a bottom plan View of the same parts. Fig. 4 is a face view of v the cam-Wheel for imparting the movements to the needle. I

The machine is constructed with the bedplate 1 from which rises the standard 2 with overhanging bracket-arm 3 formed at its forward end with the vertically alined bear- 75 mg bosses 4 and 5 in which are mounted the oscillatory bearing sleeves G and 7 each affording journals for the rcctilinearly reciprocating needle-barS. Secured upon the needle-bar 7 by means of the set-screws 9 are the spaced thrust-collars 10 and l0 with intermediate block 11 loosely mounted upon the needlebar and having oppositely extending studs 12 upon which are mounted slide-bldcks 13 85 entering the parallel slotted members 14 of the bifurcated needle-actuating lever 15 fulcrumed intermediate its ends upon the stud-screw l 6 carried by the machine frame and pivotally connected at its opposite end 90 by means of the screw-pin 17 with the upper end of a link 18 whose opposite end is con nccted by means of the stud screw 1,9 with the circular crank-plate 20 which is mounted upon the transversely disposed main-shaft 95 21 journalcd in the machine frame and carrying the belt-\vhecl 22. The needle-bar thus derives a complete reciprocation for each rotation of the main-shaft.

The needle-bar has secured upon its lower 100 tlidcollar end by means of a set-screw 2? Q-l having the forked bearing boss 25 for the fulcrun'1pii1 26 arranged parallel with the path of reciprocation of the needle-bar but laterally ofl'set therefrom. fulcrum-pin 26 by means of the set-screw 27 is a, lateral lug 28 of the swinging: needle clamp block 29 formed with the usual socket in which is secured by means of the setscrew SOthe shankv'of -tlieeye-pointed needle 1.1555

Fig. 2 is a jogging 70.

intermediate the sleevesG and' Fixed to the needle-bar The side of the needle-clamp block 0pposite the tuicrum-pin 26 is formed with a nudinal web or tin 32 to which is at uide-rod fitted within and partially emby a transverse slideway in the guide-block 3 L forming the head of a .tul- ..rum-pin which is journaled in a transerse hearing boss 36 upon the lower end of! depending arm 87 of the needle-jogging elbow lever which is tulcrumed upon the stud-screw 38 carried by the depending lug 39 of the bearing sleeve 7 and having a lateral arm 40 with. forked extremity 41 beeen the spaced members of which is pivted by means of the pin 4-2 the lower end of l; 433 whose opposite end similarly iced by and pivoted by means of the set w-pin all within the forked extremity of a swinging arm or lever 46 fulcrumed at its opposite end by means of the pin Ll-YT to an upwardly extending lug 48 upon the top of the sleeve 7. As the needle-joglever has in. practice only a slight rocking motion, it will be observed that the parts t3, constitute practically a parallelmotion device in which the connecting link has a substantially rectilinear to-and-t'ro motion. p

The link as is provided near its upper end with the preferably integral laterally extending ring or yoke 49 loosely embracing the upper portion of the sleeve 7 and the and provided with the external annular groove 50 which is entered by a roller-stud 51 carried by the forwardly extending arm 52 of a rock-lever fulcrumed upon the bracketarrn at 54 and having a rearwardly extending arm 53 carrying at its extremity stud 55 embraced by theupper end of a .nnlr 56 which is provided atits opposite end with a studbT carrying a swiveled block 58 fitted adjlustably within the.

under-cut segmental groove or slot 59 in a segment-lever 60 which is fulcrumed upon the machine frameat 61 and has a rearwardly extending arm 62 carrying a rollerstud 63 which enters the cam-slot 64s in the cai n-wheel 65, which has in practice the usual two-to-one connection with the main shaft. Thus the ring 49 with groove 5(3 and the stud 51 of the rock-lever 52 which enters said groove, together constitute, with the link 43, a universal-joint connection between the vibratory actuating member 52 mounted upon the fixed stud 54: and the joglever 37 fulcrumed upon and artaking of the turning movements of the s eeve or support 7 for the needle-bar 8.

As will be observed by reference to Fig. 4, the cam-groove 64 is formed at opposite sides concentric with the supporting stud 65 of the cam-wheel 65, the inner and outer concentric portions being active while the needle-bar 'is in its lower position and the point of the needle is in the work, while the connecting eccentric portions act upon 6 ithe stud 63 of the grooved sogmentdever .ached one side of the lower portion oi the when" the needle-bar is in its upper position and the point of the needle is withdrawn of the parts will be so reduced in transmission to the needle as to be inappre'ciable in the stitching. As the slide block 34; so e1nbraces the cylindrical slide-rod 33 that it par-takes of the latters movements in a circular are about the fulcrum-pin 26, it will be observed that the pivotalpin 35 forming the shank of the slide-block will have a slight endwise motion in the movement of the needle from one to the other of its extreme positions.

In the initial lateral position of the needle for the edge thrust, the lateral arm 4-0 of the jog-lever is raised and the depending arm is in position to bring the guideway ot' the block 34; nearly in alinement. with but slightly eccentric to the axis of the needlebar and the fulcrum-pin 26, while in the opposite extreme position of the needle,'as represented in Fig. 3, the eccentricity of v the latter to the needledoar is increased by the width of the overseam to be. stitched. It will be seen, however, that when making either its edge or depth thrust the needle is never removed far from axial relation with the needle-bar, the side pressure upon the journal of the needle-bar in the bearing sleeve 7 being inappreciablc; and the'durability of these parts of the mechanism is tliuspractically the same as that of the ordi nary straight-way stitching mechanism in which the needle is arranged permanently substantially in the axial line of the needlebar.

It will be observed that, block 58 in the segmental groove 59 ot' the lever 60 toward and from the fulcrunrot said lever, the'range of vibration of the rock-lever 52 5*; may be varied in the required degree to change the amplitude-of by adjusting the are in substantial alinement, the' lateral movement of the needle 31 propor- 'sleeve or support having spaced upright arms 67 68, in which is journaled the transverse looper rock-shaft 69. Upon the rock; shafi 69 is fixed the plural armed looper- July 1903.

and 08' to coiiperate with said loopers and the needle in the formation of overseam stitches, substantially as shown and described in the United States patent to J. (l. Greene No. 304 638 of Sept. 2, 1884, and the patent to E. E. Allen No. 734,794, of p The oscillatory movei'nent of the looper reek 'liaft 69 fro1n which the operative movements of the loopers and are derived, is communicated crmned upon the michinc fran'ie at '76 and formed 'h a lateral arm having a univ versal-j at connection 77 with one end of a vertically reciprocating connecting rod 78 whose'soo osite ene is'attache to alateral arm of the'looper-carrier 70; while an upwardly extending arm of the actuating POCiclEl/QZ carries a roller-stud 79 entermg a cam-groove 80 in a rotary CtH11\l18Pl -81 (represented in dotted lines only in Fig.

1) turning at one-half the speed of rotation of vthe dri 'ing shaft 21 to which it is; inv

practice connected by any usual or suitable ggearin The looper mechanism is so actuated that the thread-carrymg looper 71 lillifis a thiead-loop from the needle in each *z ecipiocation of the latter in one of its littoral pos tions a d the non-threaded ljooper takes a theeawloop from the needle of the same in the in each reciprocation thereof. The

other extreme lateral position ithread-carryin looper. passes through its respective needle-thread loop and the loop 4 v s 1 I, I of its own thread .ZS distended tor subsequent passage of the needle while the non-threaded looper seizes respective needle-thread loop which is distended by the respective reader for passage of the needle in its receding descent, whereby a three-thread overseam is Jroduced similar to that of the well-known singer H. machine as described in the United states patents to J. Greene No. 804,638, of September 2, 1884, No. 360,484- and No. 360,435, of April 5, i881 l p The upper end of the bearing" sleeve 6 is formed with a flange 6 upon which is secured by means of screws $2 the bifurcated foot 83 of an upright post Stformed with a vci tical channel or guideway 85 which isentered by the split stud 86 extending laterallvfiem -& collar 87 fixed upon the upper id of the needle-bar by means of the set-s. v 88, By this means the needle bar is permitted to reciprocate freely within its 'journal in the sleeve 6 but is caused to turn therewith by engagement of the lug v86 with the slideway in the post 84.. he

said shaft which meshes with a similar split lug S6 is formed with a screw-socket entered by a tapering screw 89 by which the same may be expanded to take up wear when required.

The collar is provided with a lateral lung 00 from which depends a guide-pin 91 parallel with the needle-bar and adapted to enter a slideway formed in the upwardly extending post 92 upon the top of the sleeve 7 and within the body of said sleeve; whereby the needle-bar is caused to partake of the circular movements of the oscillatory hearing sleeve 7.

The bearing sleeve 6 has secured at its lower end beneath the bearing boss it the pinion 93 meshing with the rack 9% at the forward end of a reciprocating bar 95 which is held in contact therewith by means of the guardplate 96 secured by screws 97 to the side of the bearing boss at. The rearward end of the bar 95 is provided upon the oppo- 'site side with rack-teeth 98 meshing with a shaft 104 and provided upon its opposite end with a similar rack member 105, the teeth of which are hidden by the bearing boss 66 in Fig, 1, meshing with the segmental gear 106 tixed upon the lower end of the oscillatory sleeve carrying the loopci' shaftsupport 67 68. The actuating means for imparting oscillatory movements to the shaft 100 comprise the bevel-pinion 107 fixed upon pinion 108 upon a, transverse shaft 109 jOUl': naled in the standard 2 and driven alter nately in opposite directions in a suitable or well-known manner by means not shown in the drawings. As is 'conni'ion in the class of machines referred to, the stitch-forming mechanism perforn'i's its overseaming stitchforming operation for the Stitching! of the first side of the lmttonhole without. circular moven' ent, but at the ,l'aeginniug of thc.e ve stitching operation the shaft. 100 receives a step-by-step semia-otation and through the described connections innoarts correspond ing movements to the stitch-forming members in order to lay the ov rseam stitches substantially radial to thereunder}. end of the buttonhole eye, after which the stitching of the second side of the buttonhole progresses without fui'ther returnmovement of the stitch-forming devices which are however, returnedto initial position at the completion of the stitching operation.

As herein shown, the machine is provided with the usual work-plate 110 formed with undercut transverse ways to which areiitted I the ends of the slide-plate 111 having'tongues ill;

112 fitted to said ways; and the slideplate 111 is formed with a central opening having longitudinal undercut ways 113 in which are fitted the tongues 114 along the edges of the sliding clamp carrying plate 115 formed with roughened or serrated portions 116 atl'ording the lower jaws of the work-clamp whose upper jaws are provided by clamping feet 117 pivotally mounted uponthe spring-arms 118 of a clamp-lever operated by means of the finger-lever 119, substantially as shown and described in the patent to J. G. :ll'POllQ No. 319,7OQ, of June 9, Y

Thc traveling work-clamp receives its stcp-by-step longitudinal feeding movements by connection of the slide-plate 115 with an endwise moving bar 120 actuated by means not shown, and it has imparted to it also the usual sidcwise movements for spacing the parallel lines of side stitches by laterally shifting the transversely movable slide-plate While the needle-jogging mechanism of.

the present improvement is herein shown and described in connection with a buttonholc stitching machine of a particular-type, it is to be understood that in certain of its features it is adapted for embodiment in other classes of overseaming machines, while its details of construction are susceptible of material modification, without departure from the scope of the present invention.

Having thus set forth the nature of the invention, what we claim herein is:-

1. In a sewin machine, the combination with the work-plate, circularly movable sups ports disposed respectively above and below the same, and means for imparting to said supportscircular movements in unison, of stitch-forming mechanism comprising a rectilinearly reciprocating.needle-bar journaled in one of said supports, a needle-clamp mounted for transverse movementthereon, a guide-rod fixed to said clamp and disposed parallel with the needle-bar, needle-jogging means including a jog-lever fulcrumed upon said support and having a slide-block pivotally mounted thereon and embracing said guide-rod, arock-lever mounted upon a fixed. fulcrum, and a link-connection intermediate said jog-lever and rock-bar, a needle carried by) said needle-clamp, a loop-taker mounted upon the other of said supports and cooperating with said needle in the production of stitches, and means for imparting reciprocating movements to said needlebar and operativemovement-s to said looptaker. a

2. In a sewing machine, the combination with the work-plate, circularly movable supports disposed respectively above and below the same, -and means for imparting to said supports circular movements in unison,

l l l l 1 clamp pivotally mounted u on and at one side of the axialsline of sai needlebar and movable transversely thereof, a guide-rod fixed to said clamp at the opposite side of the axial line of the needle-bar and disposed parallel therewith, a jog-lever fulcrumed upon said support independently of said needle-bar and having one arm provided witha slide-block pivotally to embrace said guide-rod and a laterally extending arm, a reciprocating member supported independently of the said support and pivotallv connected to the lateral arm of said jog-lever, a needle carried by said needle-clamp, a loop-taker mounted upon the other of said. supports and cooperating with said needle in the production of stitches, and means for imparting reciprocating movements to said needle and operative movements to said loop-taker.

3. In a sewing machine, the combination with the frame comprising a bracket-arm formed with a bearing boss for the needlebar, of a reciprocating needle-bar embraced by said bearing boss, ed upon said needle-bar and carrying a laterally moving needle, an angular jog-lcver fulcrumed below said bearing boss and independently of the needle and comprisinga lateral arm and a depending arm having a sliding connection with. said needle-clamp,

swinging lever disposed substantially parallel with the lateral arm of said jogdever and having a fulcrum above said bearing boss and substantially parallel with the tulcrum out said jog-lever, a link connecting said swinging lever with the lateral arm of said jog-lever. actuating means applied to said link for jogging the needle, and means for reciprocating said needle-bar,

4. In a sewing machine, the combination with the frame comprising a bracket-arm formed with a bearing boss, and a circularly movable sleeve journaled within said bearing boss, of a reciprocating needle-bar embraced by said sleeve and connected. therewith to partake of its circular movements, a needle-clamp mounted upon said needlebar and carrying a laterally moving needle, an angular jog-lever having a fulcrum mounted upon and depending from said sleeve transversely of said needle-bar and comprising a lateral arm and a depending arm havinga sliding connection with said needle-elamp, a swinging lever disposed substantially parallel with the lateral arm of of ating means applied to said link for jogging mounted thereon a needle-clamp mountsaid swinging lever I the needle, means for imparting circular movements to said sleeve, and means for reciprocating said needle-bar.

5. In a sewing i achine, the combination with the frame coi'nprising a bracket-arm formed with a bearing boss, and a circularly movable sleeve journaled within' said bearing boss, of a reciprocating needle-bar journaled within said sleeve and connected therewith to partake of its circular movementsa needle-clamp mounted upon said needle-bar and carryinga laterally moving needle, an angular jog-lever having a fulcrum mounted upon and depending; from said sleeve transversely of said needle-bar and comprising a lateral arm and a depending arm having a sliding; connection with said needle-clamp, a swinging lever disposed substantially parallel with the lateral arm of said joglever and having a fulcrum mounted upon and disposed .above said sleeve and substantially parallel with that of said joglever, a laterally extending ring carried by said link and adapted to embrace the needlebar and provided with an external annular groove, a rock-lever mounted upon a fixed fulcrum and having an arm carrying a stud entering the external groove in said ring, means for actuating said rock-lever, means for imparting circular movements to said sleeve, and means for reciprocating said needle-ba r.

6. Ina sewing-machine, a stitch-forming mechanism COITIPIlSHlg a reotilinearly reciprocating needle-bar, a circularly moving support in which the same is journaled to reciprocate and with which it is adapted to turn, .means for imparting circular movements to said support, a'needle-clamp pivotally mounted upon and at one side of the axial line of said needle-bar and movable transversely thereof, means upon the opposite side of said axial line for imparting transverse jogging movements to said needleclamp, and means for reciprocating said needle-bar.

7. In a sewing machine, the combination I I g l l l with the frame, of stitch-forming mechan ism'comprising a rectiiinearly reciprocating needle-bar, a circularly moving support in which the same is journaled to reciprocate and with which it is adapted to turn, means for imparting circular movements to said support, a' needle-clamp pivotally mounted upon and at one side of the axial line of said needle-bar and movable transversely thereof, a jogging member mounted upon said support and connected with said needle-clamp upon the opposite side of said axial line for imparting transverse movements to the needle, an actuating member mounted upon saidframe independently of said circularly moving support, a universal joint connection intermediate said actuating member and jog ging member, and means for reciprocating said needle-bar.

8. In a sewing machine, the combination with the work-plate, circularly movable supports disposed respectively above and below the same, and means for imparting to said supports circular movements in unison, of stitch-forming mechanism comprising a rectilinearly reciprocating needle-bar journaled in one of said supports, a needle-clamp pivotally mounted upon said needle-bar and movable transversely thereof, means including a vibratory member piv'otally mounted upon said support for imparting jogging movements to said needle-clamp, a needle carried by said needle-clamp, a loop-taker mounted upon the other of said supports and cooperating with said needle in the production of stitches, and means for impart ing reciprocating. movements to said needlebar and operative movements to said. looptaker.

' In testimony whereof, we have signed our names to this specification, in the pres ence .of two subscribing witnesses.

JAMES G. GREENE. LOUIS F. A. BUCHNER. Witnesses:

HENRY J. MILLER, JOSEPH F. JA UITH;

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