US1002217A - Wax-thread machine. - Google Patents

Description

O. E. BROWN.

I WAX THREAD MAGHI NB. APPLICATION FILED 1 33.11, 1009,

1,002,21 7. I Pat ented S'eptF5, 1911.

3 BHEBTFBEEBT 1.

MTOHNEY 0. E. BROWN. WAX THREAD MACHINE. ,APPLIGATION FILED FEB. 21, 1909.

Patented Sept 5,1911.

3 SHEETS-SHEET 2. 4

WITNESSES 5 nvvsnron 7 T WK/M mamy 0 E. BROWN.

WAX THREAD MACHINE. APPLICATION FILED rn1s.27,1909.

1,002,217, I Patented Sept 5,1911.

nmmver zen of the United States, residing at Brocli,

UNlTED STATES PATENT OFFICE.

OTIS E. BROWN, OF BROCKTON, MASSACHUSETTS, ASSIGNOR TO THE SINGER -M ANU- FACTURING COMPANY, A CORPORATION OF NEW JERSEY.

WAX-THREAD MACHINE.

Specification of Letters 1atent.

Patented Sept. 5, 1911.

Application filed February 27, 1909. Serial No. 480,338.

To all whom. it may concern: I

-Be it known that I, (has E. BROWN, a cititon, in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in lvax Thread Machines, of which'the following is a specification, reference being bad therein to the accompanying drawings.

This invention has for its object to provide an easy running and efiicient ,mechanism particularly adapted for machines for StltClIIIIgWlth the use of waxed thread; and it consists in the combination and arrange ment of partsherein shown and described and pointed out in the appended claims- One of the characteristic features of the present improvement is the employment of cranks and eccentrics for actuating the thread-handling devices in lieu of the cams commonly employed for such purpose in stitching machines for the heavier class of work, whereby 'lightrunning and freedom from excessive noise is assured, while the avoidance of harsh movements of the parts 7 insures durability of the mechanism.

In the accompanyin' drawings, Figure 1 is a sectional front si e elevation of a machine embodying the present improvements and Fig. 2 a plan of the-same. Fig. 3 is a. perspective view of the machine with the frame indidated mainly in dotted outline, and with the rear side ofthe wax-pot broken out to expose its internal construction; .Eig.

4 is a front end view of'the forward onies;

of the machine, Fig. 5 a rearend view of the actuating mechanism for the thread handling devices and Fig.6 a transverse section of the head of the bracket-arm and mecha-;

nism contained therein, looking forwardly. Fig. 'Z-is a detail-view of the feed actuating 'mechanism and Fig. 8 an enlarged crosssection representing the feed regulating means. Fig. 9 is a perspective view showing a portion of the Presser-foot lifting-device and Fig. 10 a perspective'view of the clutch mechanism therefor. Fig-11 isa plan view of the thread retainercoiiperating with the take-up ,cont-rolling thenpper thread. 50. arm and. parts carried thereby.- Fig. '13 is a transverse section of the wax-pot and thread.

Fig. 12 isa perspective view 0 thetake-up leading and stripping mechanism contained therein, hudFig. 14 a perspective view-of needle 5 is mounted in the reciprocating needle-bar 6 journaled in the upper and lower bearings 7 of the laterally movable needle-frame 8. The needle-bar carries the usual collar 9 with lateral stud 10 embraced by one end of the iink 11 whose opposite end is connected withthe stud 12 carried by the forwardly projecting crank-arm 13 of the needle-actuating rock-shaft 14. mounted in suitable bearings upon and longitudinally of the overhanging bracket-arm 3. At its rearward end, the rock-shaftM is provided with a de' nding crank-arm 15 connected by means ofa link 16 to the upper end of a linkbar 17 whose lower end is provided with a strap 18 embracing the actuating crank 19 formed in the driving shaft 20 which is journaled within and transversely of the standard 1 parallel with the needle-actuating rock-shaft 14. v i

Loosely mounted \upon a shaft 21 journaled upon center screws 22 in the bearing lugs. 23 extending rearwardly from 'the I standard 1 is a sleeve'24: confined between thrust-collars 26 and constituting a member therotary movements of the actuating cran the dri ying shaft, the linkbar 17'is t "usadapted to move bodil' upon the axis of oscillation of the yoke orradius-bar 27, whereby the upper end-of thelink-bar '17 connected, wit-Hthe link -1fi...is..mQred in. a

substantially elliptical path with a'nearlyvertical major axis'adjacent the rockshaft 14.

Y The several members of the mechanism are so proportioned and arranged that when the upper end of the link-bar is rising from its extreme lower and rearward osition, a little below the position indicated indotted lines in Fig. 5, its relation tOlth de nding arm 15 of the rocks'haft is'suchtiat'the needle is in its lowest position. 'As' the linkbar. rises'to and slightly above the dotted ion line position of Fig. 5, the arm '15 is swung slightly forwardly to raise the needle sufliciently to throw out its loop for the shuttle, after which it moves upwardly and forwardly practically in an are described by the link 16, whereby the arm is maintained T stationary for a time sufficient to permit the distention of the needle-thread loop bythe shuttle and the advance of the material under the feeding action, after which the approach of the upper end of the link-bar to the rock-shaft and its continued movement beneath the same causes the rapid move ment of the crank-arm 15 to extreme forward position and conscquent rise of the needle to its highest )osition.

The lower portion of the linlcbar 17 is provided adjacent the strap 18 with a rearward offset or extension carrying a st'udscrew-i embraced by one end of a pitman 31 whose opposite end embraces a similar stud-screw 32 carried by a lateral crank-arm 33 of a rocking sleeve 34 which is provided with a forked arm 35 which embraces a roller-stud 36 carried by a crank-arm 37 upon. the ream 'ard ,endof the shuttle actuating rock-shaft 38 which is journaled in bearings 39' within the cylinder arm and carries at. its forward end the shuttle-driver 40.

The shuttle 41 is of the wellknown Singer oscillating type, provided with the barrel thread-case 4'2 and fitted to oscillate w thin a race-43 at lvhe forward end of the cylinder arm 2, the throat 44 and heel 45 of the shut-- tle being alternately-engaged-by the arms ofthe shuttledriver in a \vcll-know'n manner, By tljle particula-r arrangcn'icnt of the'lmk connection 31'with the link-bar 1'? described above-,- the shuttlemovei'ncnts are timed,

' before recited, so as to cooperate with the:

needlev in the manipulation of. the upper threadsqgrsto seize and dist'end the needles 'ihreadloops while theneedlc-eye is beneath the work, thus avoiding any undue straii'i upon the thread in the loop-seizing and casting operations which would be produced-1n 'zase the rise of the needle was hastened or the-action of'the shuttle upon the needle thread was delayed.

' Mounted loosely upon-the rock-shaft l lbetweenthe thrust-collars 46 is a' rocking sleeve 47 having two. rearwardly projecting and angularlydisposed arm's 48.an d 49, the formcr ofwhich is connected by means of the link 50. withtl-le upper end of the link-bar 17 by means 0f the send-Sewer to which the link 16 is connected. Thecrank-arm 4 9. y

of the sleeve 47 is connected by means" of a bent link 59. with a. cranlear'm fixed upon the take-up rock-shaft 54- rnounted in suitable bearings 55 upon the bracket-arm 3. The roek-shaft 5 1- is provided intermediate said bearings, for a reason presently to be described, with an otl'set portion 56 between which and its extreme forward end it'i s formed with an axial thread-aperture 57.

Upon the forward end of the rock-shaft 54 is fixed the hub 58 of the take-up arm or y lever 59 carrying the grooved tension-wheel 60 one side of which is dlsposed substantially in alinement with the thread aperture of the take-up rock-shaft, the tension wheel being jo n-naled upon the pin 61 fitted to a suitable transverse bearing of the take-up arm and having a head 62 normally resting upon the outer face of the take-up wheel, or a washer 63 intermediate the same, a spring 64 being interposed between the bearing in the arm 59 and a washer 65 confined ad justably upon the pin by means of a nut (36 applied to the threaded opposite end of the pin, whereby the tension wheel (50 is normally subjected to a slight frictional drag. The take-up arm carries at its outer end a grooved threadwheel (3.7 mounted upon the sl'iouldered studscrew 68 and intermediate its ends a simi larly g t bored thread-wheel'tif) mounted upon the stud-screw 70, each of said thread-wheels being embraced between the expanded adjacent ends'of the guard loops 71' and 72, respectively.

Adjustably fixed upon the head of the lu'ackctarm by means of the fastening screw 73 is a dowrmardlyand forwardly inclined arm 74 carrying at its outer end a stud screw 75 upon which is journaled a stationary thread-wheel 76-en1braced withina thread guard-loop 77 similarly to those car ried by the take-up arin. Adjacent and above the stationary thread-wheel is arranged a pair of thread retaining plates 78 79, the one being rigidly connected to and preferably integrally forn'ied with the bracket-piece 80 secured by 111011.119 of a suit-v able fastening screw to the head of the bracket-arm, while the other, formed of s'prii'ig metal, is secured to said bracket by means of the fastening screws 81.

The needlc threi'nl is led from the hollow forward end of the take-up rock shaft 54 7 around thetension-wheel ($0, thence beneath a guide rollcr 82 upon the talcc-up arm 59 below the same and between the gr0OY l guide-rollers 83 mounted uponstud-screws, 8,4 m the bracket-piece 55 secured to the needle-franui 8 by the fastening crew, 86, and

eyc of the needle 5'. Between the fg uide rolll f "SQ-and thc rollers 83 t'lie' thread 7 against 'disarrangemcnt by" passing through the guard-loops 71,. '(7 and 72. The takethence .lhrough the guidc-strul'r 87 embrac I up arm assumes its lowest position just after the pointof the shuttle has seized the needle-thread loop, and starts its 11Sl11g 1110\- m nt without any immediate effect upcn the thread extending from the .roll 82 to the grooved rollers 83 until the shuttle has reached its mostadvanced position and the eye of the eedle has risen above the work, when the grooved rollers 67 and 69 engage the thread below and u on oppositefsides of the stationary roller 76, when the continued rise of the takemp arm 59 causes the bending of the thread around the stationary roller 76 for taking up the slack needle-thread and setting the stitch, the lat ter bein effected as the take-up arm and i the need e reach their highest positions. In

the rising movement of the take-u p arm, one of the limbs of the needle-thread loop betweenthe stationaryroller 76'and the roller 67 is drawn between the flaring forward edges of the thread-retaini'ngi, plates 78 and 79, between which it is lightly grasped. As

' the needle and take-up arm perform the first art of their descending,movements, .the ooped portion of needle thread engaged by the take-up arm is released more rapidly .than it. can be accommodated by the delightly retained scending needle, but bein (9, that portion betweenthe plates 78' an of the thread between the, same andthe neeing a diametricalslit 90 in'i tsforward end 1e eye is not slackened to such extent as to endanger the entangling of the thread while the needle is descending, but as soon as it is engaged by the point of the shuttle, it is rea di drawn out of the retainer in the expansion of the loop in the loop-casting op eration.

by which arrangement its supporting. pin 61 .in a suitable-fixed bearing 88 uponthe head of the bracket-arm is a rocking pin 89 havm which is inserted one end of-a coiled spr'ing 91 whose opposite end rests against afixed shoulder afforded by a stud-screw 92 upon a stationar part of the machine. The pin 89 is provi ed with an upwardly proecting arm 93 which carriesa contact screw 94 Whose point is adapted to normally rest upon a lug 95 upon a fixed part of the head of the bracket-arm, the circular adjustment of the rocking pin89 being effected by turning the contact screw 94 in one" or the other irection, as will be readily understood. 'Within the slit inthe forward end of the rockin pin 89 is inserted one end of asub stant ia 1y U-shaped spring nipper-lever 6' w ich is secured in p ace by means of the clamp-screw '97. The free longer limb of the nipper-lever 96 is'formed with asegmental contact portion 08 adapted to receive the rounded head of thejournal pin 01 of the tension wheel 00. As the takeup arm rises for setting the stitch, the head of the pin 61 engages the bearing portion 98 of the nipper-spring 90, and thereby yield ingly forced harder against the adjacent face of the tension wheel, serving to practicallyl'ock it against rotation under the actionof the take-up upon the thread, whereby the final portion of the take-up movement is exerted in merely tightcning'the portion of thread between the take-up wheel and the work, and thereby setting the stitch firmly inathe'latter.

The rearward side of 'the bracket-arm 3 is provided with a projecting lug 90 embraced -by the alined centering screws 100 carried by spaced lugs 101. projecting from one end of the wax pot 1 02 fOI'lHQCllIl two compartments separated by avertical par-- tition 103 with a series of apertures 104: near the bottom for conn'nunication between such compartments. The larger of these compartments constitutes a reservoir for 111- ceiving the wax and the. smaller compartment is that into which the thread is led for the waxing operation.

As herein shown, thethread-guiding devices are mounted upon a bracket 105 se cured to suitable seat uponone edge of the waxing compartment by meansof screws 106 and dowel pins. 106". The bracket 105 is provided with an arm or standard 107 carrying the disk tension device 108 of wellknown construction, the thread being led to the same through an eyelet 109 whose shank l is secured to the bracket by means of a The tension wheel has ibecn described as "having one side in alinement with the thread delivery aperture'of the take-up rock-shaft,

screw 1 10. Depending from the body-0f the bracket is a rigid arm 111 carrying a- 105 fulcrum screw-stud 1121113011 which is journaled a rock-lever having mounted upon its lower arm 113 a stud-screw 114 affording a bearing for the grooved thread-wheel 115 mounted within a peripherally slotted cylindrical housing 116. To the upper end of the other arm 117 of the rock-lever is secured by means of a, screw 118 the shank ofthe movable stripper-blade 119 provided with a thread notch 120 in its forward edge and curved concentrically with the pivotal stud 112 to cooperate with the similarly curved fixed stripper blade 121 formed in one edge' with a thread-receiving slit 122 with longitudinal thread-engaging portion 123 in alinemcnt with the thread-notch 120 of the blade 119. The blade 121 is secured by m means of a screw 124 upon a seat formed therefor on the bracket'105. The Waxing compartmcnt'is provided near the top with a 125 forward extension 125 extending beneath and beyondthe ofi'set ortion 56 ofthe takeup rook-shaft 55, .anrfizom the bottom of this ext-ension'risesa 0st .126 upon which is mounted by' means 0 thescrew-pin 127 the 130 a register. with the thread aperture 57 of the rock-shaft 54.

The needle-thread is led. from the source of supply through the guide-eye 109, between the tension disks 108, thence downwardly around the thread-wheel 115, u)- wardly through the thread-slit 123, over t e guide-rollcr 128 and through the forward portion of the rock-shaft 5-4 to the tensionwhcel 60, whence it passes. to the needle as before explained. The several parts just described are so arranged and proportioned that when the movable stripper blade 119 is in retracted position, in which the inner portion of its notch 120 is out of register with the thread-slit 123, represented in F 14, the lead of the thread between the slit and the thread-wheel 115 is nearly parallel with. the rock-lever, while the lead of the thread between the thread-wheel 115 and the initial. tension device 108 is oblique to the length of the rock-lever. Hence, when the thread is drawn through the waxing' chamber or compartment to the'stitc'hforming mechanism, the tendency is for the thread passing around the thread-wheel115 to throw the same rearwardly, thereby advancing the stripper-blade 119 into engagement with the thread leading through the slit 128, thus itself pressing upon one side of the thread and forcing the other side of the thread against the forward end of the slit 123, the feed of the thread causing the stripping of the same by this means of superfluous wax in which the roller 115 is nor mally submerged. It will be further observed thati the greater the tension upon the thread the more intense will bethe engagement of the stripper blades 119 and 121 upon the thread.

As in other machines employing hard wax for" the needle-thread, portions of the frame are made hollow to form chambers for steam or other heating fluid. .As herein shown, the

head of-the-bracket-arm is formed in its upper portion with a steam chamber to which steam is admitted by means of the inlet pipe 129 from the source of supply. Circulation is established in this chamber through an exhaust fitting 130 tapped into the rearward side-of the head 4, andthrough a circulation ipe 131 passing horizontally iuternlediatet-iearm 3 and the wax-pot and. H downwardly and then forwardly where it enters at 132 the stoamcluuubcr provided at the outer end of the Work-supporting arm 2 the last mentioned steam chamber through the exhaust-pipe 133'.

The waX-ing'chamber "is formed 1n the lower portion at the forward side with an external recess 134 to receive a heating block 135 which is formed with an upwardly and forwardly extending portion 136 having an aperture fitted to, the pipe 131 by which it is supported. The end wall of the recess 134 is provided with a set-screw 137 which passes through the same and engages the side of the block 135 so as to press the same against the opposite end Wall of the recess orcavity in order to establish a firm metallic contact between the two, Aswill be observed, the hanging of the block 135 u on the heated steam pipe 131 causes thecon uction of heat from the one to the other, this heat being further conducted to the walls of the wax pot by contact of the block therewith as described. By this means, no special. steam fittings are required for heating the wax, which latter is in practice kept of the required-degree of consistency for permeating the needle-thread without injuring the same by overheating. As will be observed, the wax is introduced in the required quantity into the'receiving compartment or reservoir of the wax-pot in lumps in the usual crosswise of the cylinder bed 2. To this end,

the. driving shaft is provided adjacent the actuating crank 19 with a. so-called triangular cam 138 formed with outer and inner concentric portions and intermediate eccentricor active portions. This cam is embraced by a yoke 139 formed at the lower end of a swinging lever 140 whose'u per end is pivotally connected by meanso the screw-stud 141 with the depending crank-- arm 142 at the rearward end of a rockshaft 143, mounted upon the front side of the bracket-arm 3 and carrying at its fo' ward end a depending crank-framecompri ing the collar 144, parallel arms 145 and connecting boss 14(3. The forward edge q'f the needle-frame is provided witha pelt forated lug 1.4;? in which issecuredjby means of the nut 14.8 the shouldered pin 149 which. enters an aperture in the boss 146, and serves to pivotally connect the cranlcframe of the rock-shaft- 143 with the needle frame. The needleframe 8 is provided also with a rearwardly projecting lug 150 having a split socket in which is clamped by means'of a screw 151 a bushing 152 with threaded per-. foration in whichv is .fitted the threaded shank of'a screw 153 passing through a slot 154m the segmental member 155- of a de pending arm 156 of the frame and having its head 153 'countersunk in the rearward i .=ipondingly shaped fulcrum-blocks 162 face of a slide-block 15f fitted to 21 seg -mental seat 158 of taper cross-section in' the i -member155. As the fixed segmental seat 1 158 for the needle-frame slide-block 157 has substantially the same curvature as the arc of movement of the pin 1&9, it will be ob- 1 served that in the lateral movements of the frame derived from the eeuni 138 its parallelism will be maintained. The stitch regulating lever 159 is fixed at one end upon the rock-shaft 21, its other;endl'projecting through a suitable aperture in the standard 1 at the frontof the machine for convenient access by the operatorfwhile itsdntermedi- '16 ate portion is divided 01y( )l 8d=tlt 160 to --embrace the'jeentral portion of tht; vibrating lever 140, which latter is formed in opposite sides with 'b'seginental grooves 161 of V-shaped cross-section ;entered lby correformed with conical epertu-res which are entered hy the center-screws 163 mounted in the. yoke portion 1'60'of the lever 159. As will he oliserveth' the position ofthe lever determines the location of the fulcrum points 163 upon which the lever 140 vibrates, -a11d hence leterniinels thetange ot' lateral i-m'ovel'nent in the line one-amofftlie'iieedleframe and the needle. 7 Tlie'feed-ciiin 138 is Q sojifixed upon the Shaft as; .tocauee the (lateral or feeding; movements 1 to he im-r' partied to the needle ,-\\"h i l'e still in the goods "dafter gthe needle-threni "00 has-been seized 3 The pm foot: 164 is provided with vthei us uufl elongfted needle-hole 1.65 and is prof videtl witlnalshank lfifl havingat. its upper cnilaftrausversely groovedmember with a slot 1d? entered, by the fastening screw 1 68 410 and. securing the same adjustably to a cor res iondingly shapedeeat1U!) formed upon. a

. collar fixed it; the over endof the prcsser- :har 170 which ifhtted tog suital le hearings ii llu' lnegul-irl flhthe lna :l et-urrn:an'd proltlegl at th'c' top with a HlHHIlIlOI'LKLCtIp171, ethel 'lmver end of aeoiled coii lpres p lurly littetl to :vl'shouldcred phig' l 73 formed -u tlybiiqwerendroff the adjusting screw i the he I a ainst ';i-o tation hye I threaded hose "r'wi'secured in a boss 178*upon I'aclCot-u rm niemher :GW "179. v The prgcsser- 'att'eiied uponpne side at 170" ll-lithium, t, slhl-nug-ly 1;] h nted thereon the 'sleeveyi tig provided "with 'laterally"projecting Spam; cars lSlhetWcen whichis pivoted hy meeinsi v u La slot 188 in the lower 'cndof the. sleeve 1180 presser-bar. TheTlever 18B is formed with an upward extension or lug 189 in Whitih" is adjustably secured and locked by means of the nut 190 the threaded outer end ofi a stop-screw pin 191 whose point-entersI a lateral cavity 192 in the 'sleeve 180. Byutdjusting the stop-pin/flQl, the initial-position of the lever 183," is determined and .athe; point of operative engagement-of the dew 187 of the lever 1816 with the pl'esservhnruis 76 fixed. v Y W The apertured outer end' of the-cramp.- lever 1'86 embraces a pin 193 byumeainsrpfii rwhich it is ')iv'o 'tally eonnectedwit he forked lower endof'a link 194wvl10seuupper end 'is pivotally' connected by. meansxottma pin 195 with a lateral crank-arm lilfiws'ecured to the forward end of a rock-shaft?! l9? journaled Within and longitudinally-inf the bracket arin 3 and having .fixed :u'ptin 'its rearward erui'the lateral crank-anm-r198 connected by means of the SCI'BWEStUdHIQQ" with the :eccentric-rod 200 having n witsiu lower end the strap 1201' embracing tlieriao tuating eccentric 202 upon tlie' driv'ing shaft 'llhe. eccentrici202imparts to -the reek! 'Qsl aft i197, through'tlie eccentric-rQdZQO atid' erniikarm 198, rocking n ovemntsh Whichit; are communicated to the-crampinglever 1 186 throu'fil the crank-arm 196 'and' link 19 4, which hioveinents are ineffective fo he greater part, butvwhioh become effective? in. lifting the resser-bar and the: presseiz-foiit -fi when the cramping lever 186 is 'rais ed gsulfi cicntly .to-seat its zjavv 187 firmly 1113011 316 9 flat portion 170"; ofthe presser-hstrpwliich causes these parts (to become locked together and to he lifted bodily in the continuednl 1, ward movement of the link 194wifli t e crank-arm 1-96. "-lhe presserbar is adapted to rise independently of-the 'sleeve180miii order" to :permit" the PIQSSBf-fbOt .to titxkiirimoda-te itself to different thicknesses'fif flili f teitiul without afi'ect-ing'the action of jth.

lifting inechanismthereon, and'the 'sle tfe i is normally pressed downwardby ajspiitig 203 surrounding the presser-barand Inter posed between the top of the sleeve andth tipperbearing of the p'resse'r-ban zwhel 'eby the forked lateral GXtQIlSlOI1i184 a't ffli'e .115

i loive r end "of thellever 183, whi-chembrttc's;

the presser-bar 1-70, is 'caused to-fiori'nilly rest upon the top" of the series of ielding Washers 204. interposed between the .same 341L the' resser-bar and thetop of the 129 dower resser-bar bearing, whereby noise and shock areupre'vent'ed in the actulitionof -..t-he' presser-bar. The eccentric- 202 i'eso set (upon the shaft 20 as to causetheliftingnf thefpresserefoot just as the needle is about to 1 5 begin itslaterul or feeding movement, so 'as to permit the work to, be advanced bythe eedle without; resistance.

Fix'edttoth lower portion'ofthe resser barlZQ new the resser-foot Shani; and; t

to the lower end of a vertical slide-bar 205 is the perforated boss 206 of a bracket having a re'arwardly and upwardly extending arm 207 with a split bearing 208 in which is adjustably secured by means of the clampscrew 209 the hub 210 of a depending lever 211 carrying at itslower end a stud-screw 212 connected by means of a link 213 with a similar screw214 tapped into a rearwardly projecting ear of a lever 21 5 having at its lower end a slot 216 entered'by a. fastening screw 217- tapped into the upper end or shank of the stitchsetting blade 218, whose lower end is shaped to embrace the individual stitches of a seam intermediate the needle punctures, in a manner well-known. The upper end of the lever 215 is pivotally connected by means of'the stud-screw 219 with the lateral arm 220 of a rocker 221 carrying the center screws 222 which enter conical recesses in the opposite ends of the hub 210 of the lever 211 by means of which said rocker is mounted to oscillate upon,.the frame 200 207. The rocker 221 is provided with an upwardly projecting arm 223 connectedby means of a screw-stud22 1 with one end of'a link 225 whose opposite end is connected by means of the screw-pin 226 v with 0. depending crank-arm 227 fixed upon the forward end of the rock-shaft 197, which 'is preferably forxiiled in practice integral the needle is descending into the forward stitch-setter upon the bracket 206 207 rig-. 5.

end otthe needle aperture in the presserfoot to makefa new puncture. In order that the stitch-setter may have a lateral movement' inthe'line of seam to avoid interfer: ence with; the needle, the link 213 is made shorter than the crank-arm 220, whereby the stitch-setter is drawn backwardly by the linkas the crank-arm 220 rises to withdraw it from contact with the work, and is correspondingly advanced in its descending movement.

j As will he observed, the support of the idly connected with the resser-bar 170 -'c' auscs it to partake of the rising and falling movements of the latter, and insures that" boththe presser-foot and the stitch-setter shall be disenga ed from the work while the needle is; per orm'ing its feeding .m'ove- 1\u-.nt it also insures that both shall be lifted clear of the work when the 'presser-bar is raised. for the introduction orre'moval of the same. To provide for the manual lifting of the presser-bar, the slide-bar 205 is pro- The crank arms 196 and 227 are so proportioned and ar'- and stitch-formin vided upon its upper end with a fixed collar 228 carrying a lateral stud 229 upon which is mounted an anti-friction roller 230 adapted to be engaged upon the under side by a flat wearing face upon the forward end 231 of a lifting lever 232 mounted upon, a fulcrum-stud 233 projecting from the bracket-arm 3 and havin at its rearward end an eye 234 for attachment of a treadle rod in a manner well-known.

To adjust the point of application of the stitch-setter 218 relatively of the .needle path, the lever 211 is provided with an as" 235 which is engaged upon the rearward side by an adjusting screw 236 carried by a depending ear 237 of the frame member 207 and upon the front side by the point of an adjusting screw 238 Passingthrou h a lateral car 239 of the boss 206. To a just the fulcrum-point of the link 213 in the direction of scam, one or the other of the adjusting'screws 236 and 238fis withdrawn to the required extent and the other advanced press the depending ear 235 firmly against the same, the path of movement of the stitch-setter carrying .levcr 215 being 1 thus modified to suitthe requirements of the workin bringing the stitch-setterinto exact register. with the stitches.

Having thus set forth the invention, what I claim herein is 1. Ina sewin machine, the combinationwith the main-shaft provided with a crank mechanism including a reciprocating needle and a cooperating looptaker. derivin operative movements from said main-sh'at, of a pitman-lever connected with saidcrank, a movable fulcrum for said pitman-lever with means for guiding itin a defined path, a rock-shaft, a token arm" mounted upon said rock-shaft, a. cran -arm also mounted upon said rock-shaft, an intermediate rocker provided with two crank- 7 arms, a' pitman connection between one of the crank-arms of said rocker and the.crankarm of-said rock-shaft, and a it'man -conneotion intermediate the secon of said rocker and the itman-lever.

2. In a sewing machine, the combination with the bracket-arm, a needle-actuating with a thread-engaging member, thread- I guides cooperating with thetl1read.-engag mg member of said-take-np arm, and-a continuously acting tension =-=dev1oe mounted 'upon said take-upariniadjacent its supporting rock-shaft and deriving rocking movem ents therefrom.

crank-arm All) with stitch-forming mechanism including a 3. In a sewing machine, the combination reciprocating needle and a cooperating looptaker and means for actuating them, of a rocksha ft, a-take-up arm mounted thereon and provided with a thread-engaging member, thread-guides cooperating with the thread-engaging member of said take-up arm, a variable tension device mounted upon said takeup arm adjacent its sup )orting rock-shaft, and means mounted in ependently ofsaid rock-shaft for'controlling'the action of said tepqion, device.

4. In asewing machine, the combination with stitch-forming mechanism including a reciprocating needle and a cooperating looptaker and means for actuating them, of a 'rock-shaft, a take-up arm mounted. thereon and provided with a thread-engaging memher, thread-guides cooperating with the thread-engaging member of said take-up arm, a' variable tension device mounted upon said takeup arm adjacent its supporting rock-shaft, and means mounted upon a stationary support into engagement with which .said tension device is brought in the operation of thetake np arm for varying the action of the tension. j 5. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle and a cooperating loop taker and means for actuating them, of a rock-shaft, a take-up arm mounted thereon and provided with a thread-engaging member, thread-guides, cooperating, with the thread engaging member 'of' said take-up arm, a tension, device mounted upon said take-up arm, and provided with uniformly.

= acting means whereby it is caused"'to impose a drag upon the threadfan'd means mounted upon a stationary support into engagement with which said tensionxdevice is brought in the operation of the takeup arm for increasing theno'rmal action of the tension device. L i v I 61 In a-sewing machine, the combination with stitch-forming mechanism including a reciprocating needle and a'coiiperatinglooptakenjand means for actuating "them, of a rock-shaft, a take-up arm mounted thereon and provided with a, thread-engaging member, thread guid'es-' -cotiperating with the thread-engaging member of said take up arm, a.= tens1oh device mounted'fupon said take up armfa springajpliedto said takeup device and acting um irmly; to maintain a constant drag-uponzsaid tens on device,

and a yieldingcontrolling member mount-- ed upon a stationary saip'port within the pathtof'movementof, said tension device and. acting periodically upon the tension device. to an ment the 'action 'ofsaid spring thereon.

7.! n a sewing machine, the combination with stitch-forming mpclianlsm including a reciprocating tneedlnmif'dgoooperating loop:

upon a stationary support within the path of movement of said tension device and acting periodically upon the tension device j toaugment the action of said spring thereon, and means for adjusting the position of said controlling member. r 8.11m a sewing machine, the combination with stitch-formingmechanism including a reciprocating needle and a cooperating looptaker and means for actuating them, of a rock-shaft, a take-up arm mounted thereon and provided witha thread-engaging member, thread-guides cooperating wit-h the thread-engaging member of said takealp arm, a tension device mounted upon said take-up arm, a spring apfplied to said takeup device andacting um o' a constant drag upon said tension device, a rocking pin mounted upon a lixed support, a spring lever' having one end secured to said roc'king'pin and the other end'extended into the path of movement of said tension device to augment thetaction of said spring thereon, a lateral arm carried by said rocking pin, a stationary abutment adjacent'the same, an adjusting screw for determining the normal position of said lateral arm relative to said abutment, and a spring for maintaining said parts yielding lyin saidre rmly to maintain a ber, thread-guides cooperating with they th'read-engaging member of said take-up,

arm, a variable tension device comprising a thread-engaging member with one side in substantial aiinement with the'a'xial thread aperture .of said rock-shaft, a supporting;-

pin, for said thread-engaging member jourapplied to said supporting pin and actin through it to imposexa-drag nlpon the threa c'ngaging'member, and a. ylel ing controlling member mounted" upon astati'on'ary support with stitch-formingmechanism including a also naled uponsaidtake-up arm, a spring recil'nocating needle and a cooperating looptaker and means for actuating then't, of a roeleshaft provided with an axial thread aperture, av take-up arm mounted thereon and provided with a tln'eac l-engaging memher, threadguides eoii 'ierating with the Humid-engaging member of said take-up arm, a. variable tension device comprising a rotary peripherally grooved threadwrheel' having one side in substantial 'alinement with said axial thread-a 'ierture, a. headed supporting pin journaled upon said take-up arm and upon which the thread-wheel is mounted, a, spring acting upon said su orting pin in pressing the head of the latter upon one side of the thread-wheel, and ayielding controlling men'iber mounted upon a stationery support within the path of movement of said pin and acting periodi cally through the same upon the tension device to augment the action of thereon.

ll. In a sewing machine, the bombina-tion with Stll1(.l1f0l11lll],f mechanism. including a reciprocating needle and a cooperating loop taker and means for actuating them, of a rock-shaft, a take-up arm mounted. thereon and prorided with two longitudinally spaced thread-engaging members, a fixed thread-engaging member disposed intermediate the paths of'morement ofsaid spaced. members, a relatively stationary thread-guide disposed beyond the paths of moven'ient of the spaced thread-engaging membersrelative to said rock-shaft, and a thread-guiding member carried by the takeup arm :icljaet-int the a .d rock-shaft from which the thread is led to said relatively stationary thread-guide.

l2.' In a sewing machine, the combination with stitch-forming mechanism. including a reciprocating needle and a cotiperatinglooptaker and means for actuating them, of a rock-shaft, a take-up arm mounted thereon and provided with. two longitudinally spaced threadrengaging members, a fixed thread-engaging member disposed intermediate the paths of movement of said spaced members, a" relatively stationary threadguide disposed beyond the paths of movement of the spaced thread-engaging members relative tosaid rock-shaft, and a, tension deviee mounted upon the take-up arm adjacent said rock-shaft.

13. In a sewingmachine, the combination with stitchforming mechanism including a reciprocating needle and a eoti 'ierating ptaker and means. for actuating them of a rock-shaft, a take-up arm mountedthereon and provided with two longitudinally spaced threadmngaging members, a fixed threadengagmg member d sposed intermediate the paths of movemeiitof said spaced members,

a relatively stationary thread-guide dis-.- posed beyond epaths' of movement of the-x adjacent the said rock-shaft with stitch-forming n'ieehai'iism including a i reciprocati11g needle and a cooperating l0op taker and mums fo' actuating them, of a rock-shaft, a take-up arm mounted thereon and provided with two longitudinally spaced. thread-engaging members, a fixed thread engaging; member disposed intermediate the said spring 5 taker and means for paths of .movei'nent of said spaced member's,

and provided with means of adjustment insubstantially the direction of movement of said spa eed members, a relatively stationary thread-guide disposed beyond thepaths of,

moven'ient of the spaced thread-engaging members relative to said rock-shaft, and a thread-guiding member carried by thetakeuparm adjacent the said rock-shaft from which the thread is led to said relatively stationary thread-guide.

15. In a sewing-machine, the combination- "fi'ltll stitch-forming mechanism including a reciprocating needle and a cooperating looptakei and means for actuating them, of a rocleshaft, a take-upajrm mounted thereon and provided with two longitudinally spaced thread-engaging members, a fixed threadcngaging member dis osed intermediatethe paths of movement- 0 said spaced members, a rigid arm affording a support for said intermediate thread-engaging member, a studscrew by means of secured for lateral adjustment upon' a stationary member of the machine, a relatively stationary thread-guide disposed beyond the paths of movement of the I which said rigid arm is.

spaced threadengaging members relative to said-rock i shaft, and a thread-guiding member adjacent-i thesaid rock-shaft from which the thread "isled to said relatively guide.

16. In a sewing machine, the combination with stitclrforming mechanism reciprocating needle and a. cooperating loopaetuating them, of a;

rock-shaft, a take-up arm mounted thereon stationary thread including and carrying a thread-engaging member,

stationary threat'l-engaging member intermediate the path 'of'movement of thefirstr named. thread-engaging member and said-i roek-sl'iaft, a.-relat'vely stationary threadguide dlsposed beyond the range ofinovement- 'of the first-named thread-engaging member in relation to the stationary thread: 9-

engaging member, guard-loops embracing said thread-engaglng members, that embracing the first-named member extending in the direction of its operative movement and that embracing the stationary member lying in the 0p )osite direction, and a pair of spring pressed thread-retaining plates extending intermediate said stationary thread-engaging member and. the stitelrsetting position of the first-named. thread-engaging ii'm rn'iber.

17 In sewing machine, the eon'ibination with stitch-forming mechanism. including a reciprocating needle and a cooperating loop? taker and means for actuating them, of

rock-Shaft formed intermediate it's ends with alateral cavitv and. with an axial thread aperture leading from said cavity to its forvward extremity, a take-up arm fixed upon the forward end offsaid rocleshaft and carrying a thread-engaging member, thread guides cooperating with the thread-engaging member of said take-up arm, a tension (ll-rice mounted upon the take-up-arin and having a thread-engaging member with one side in substantial almement with the axial thread-apertureof said rock-shaft, a Waxpot extending beneath said rock-shaft, and a thread-guide disposed above said Waxpot and extending within the lateral cavity oi the rock-shaft and in alinement with its tlu ead-a 'iert-ure, and adapted to guide the tl'n'ead from the Wax-pot through said aperture to the tension device. a

1.8. In a sewing-machine, the combination with stitch-forming mechanism including a reciprocating needle and a cooperating looptake' and means for actuating them of a rock-Shaft formed intermediate its ends with a lateral cavity and with an axial thread-aperture leading from said cavity to its forward extremity, a take-up arm fixed upon the forward end of said .roeleshatt In teatimony" \rlmrooi, l have signed my name to tilt; a ieeitieatlon, in the pros'ence of two ,SllbSUill'Jlllg Witnesses.

' OTIS E. BBQ).

ll mun J. MILLER, ,l-l. A. BIURNEMAIYN.

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