US1252931A - Sewing-machine. - Google Patents

Description

s. WgNELSON; SEWING MACHINE. APPLICATION FILED IAY2I. I912;

I is,

I s I:

maex I I I Inn/enter;

'Patenmd Jan. 8,-1918.;

e..w. .NELSON.

SEWING MACHINE. APPLICATION FILED a snirs-suin 2.

s. w. NELSON. sswm'c mcmne.

7 APPLICATION FILED IMYZI. I912- enonen w] mean, or cnnvnnmn, 01:10, cmvnmnn,

of various types'the main features Cleveland, in the county of Cuyahog State of Ohio, have invented certain new mcnnm comrm, or

assrenon To [run s'rnmmn snwm'e 01110,; conrona'non or 0:810.

snwnte-naenmn.

To all whom it may concern Be it known that I, Gnonon W. NEIBON,

citizen of the United States, and'resident 05 a an and useful Improvements in Sewing-Machines, of which the following is a specification. V

This invention relates to sewing machines, and particularl. to" that class ofsewing machi es in wh d su ess e r up sries ofstitches are made at separated points'in thework, as for example, in hntton sewing machines, etc. a

While certain features of the present invention are applicable to sewing machines of the invention are especially adapted to 'ma-' chines of the class justmentioned for form- H this class'it is customary on the completion of {a group ing series or groups of stitches at separated points in the wor and particularl to Ina-- chines of this class in which a sing e thread is used, that isto say, in button sewing and similar machines for forming groups of chain-stitches. In chain-stitch machines of w sever the thread orseries of stitches bya suitable" means under the control of the operator.

in such chain-stitch machines provision a preferably'should bemade for certainnecesw m ipn e n of the thre r b that means from thesourc'e of sn 85x be employed for pullingofi of thread to."pe rinit t e forming ofthe} 7 I stitch ofaeseries without drawing down the end of the thread below the upper surface I i of the work, lthat *the length of the thread beyond the needle eye "at the beginning of the makingof suclra seriesef stitches should be,;,determined in order that ther ma be Qno excess thread beyond whatis necessary 681,208; filed. closed a machine of t'his same, so far.

for the formation ofthe first stitch, and that.

; o n the-completion of=a; seriesor. cup-of ing in the material 0 such stitches the-"end of the threa remaintied or knotted in or r to preventraveling out of the, stitches.

In a prior application of mine, Serial No.

March2,1 1912, there, is disas the structure"and general organization of its parts are concerned, and in, which means Lil-1'6 prov ded tor, controlling with precision the amount of thread drawn of! I Specification of Letter-is Patent.

Application. ma Key 21, 1912. sum in. 698,690.

.It has been found that rated upon should be I Patented Jan.s, ,1918;

irom, the

series or roup and for also regulati L the length of ng yond the eye of avoiding the use of each new series. In the machine of, said application a thread-restrainin device or thread-clamp is associated with suitable pull-off; means and with a work-holder in such a manner that on the completion of a series of stitches, and before the severing of .be drawn off from thesour'ce ofvsupply to permit the proper formation of the first stitch of the nextserics,

supply for the first stitch of a the thread, a 'sufiicient length of thread may I ear-sew. omenthe end of thread extendinghbef oi the needle, for the purpose of an excessive amount so of thread in making the first stitch or loop after which the thread is broken'and the severed endoi the Y thread is drawn back untilthe'p'ortion be yond-theeye :of the needle is; substantially ]\1St sufiiclcntto permit the firststitch of the {new series to be application, however, the device- 01 thread-clam means, which include "asonezof its functions thedrawing back of the severed end of the thread, were associated and connected threadrestrainin with the work-holder for actuation by the operator after the automatic stopping of the machine at the end ofaseriesofstitches.,

, In the present-machine the principal devices jnst referred to,

"properly formed: m In said and the pull-o p V, to ,a thread restralning' device for clamping "the thieadzatp a suitable time afterthefcompletioii of a,

drawing rfiff from"the, source of supply. a

series" ef stitches, and pull-elf means for sufiicient length of thread for thefirst loo p y of a -hew series,and for also drawing-b e towardthe source severed; thread,

the. rincipal chines of the prior art,

vof these functions of clamping theread beencoin'pleted and thea'ction oIf the'needlebar mechanism is-substantiallyfinis'hed and "befo ejth next series" is started. I pthep wordgthe' machine isdisting l'fihed p fltlon m m-y irointha't ofsaid prior of supply 7 the end jof the" v may be retained", but 1 feature which distingu1shes.,-a5 this "invention from that of said prior ape plication and in general from other 1 1a is the employment of means for automatically,performinggeach andpull-ing ofithe thread in oneldirection or therother after'oneseriesof'stitcheshas of the fact that antoniat'ic' instead f of'manilalzmeans isemployed forpertorm ingggertainrunctions'whichfwem, iornierly iie" 20 hasibeen rclamped,

Y manually related to operation of severing the thread, but which in the. present 11.1%-

. 7 chine aremahually unrelated to the threadsevering-function, and are separated there r 6 from lantl- ,erformed whollyv automatically without re erence to'when the'severing op eration rnaytakeiplace.

,Another. feature of the invention relates ,to'the; ofthes'e various automatically 7 1 10; controlled operations just referred to.

' threfad restraining device of the aforesaid The application was timed to come into action from the' sourr'm ofsupplly of sufficient thread -15 x-for the formation of t efirst loop of a new series; Infthe present case, however, this threadtstrainih'g device is timed to permit device to. draw-bfi this amount of from-the supply after the thread and-to pull off the thread from'a' point inthe rear ofjthat atwhich the thread is'clamped, instead of from a point :in' advance of the thread clamping device as was the case in said rior applica- 25tion. Furthermore, the three -clamp of the machine preferably engages and olds thethread-at a pointfon the face-plate I -oftthe-inachine and at a comparatively short from the needle,- so that but a short 1 V so. ,--1ei1 gth of thread locatedbetween the two ge es-whenc i su a a y ed before it; isfsevered.

' "Otheji'f-fea tures of therinve ntion not hereinbeforejreferredto will be herei after 'de- 'ed an'd than" of sewing of them are ape orally 3}?)11081118 to that class of sewing machines or or'ming groups of separated stitches, and particularly to button-sewing machines, for which reasons the various featur'espf the invention are illustrated in the draw ngs as embodied in. a button-sewing mach ne. Most of the parts of this machine are or may be similar to those of other button-sewing machines heretofore used, such for exam 1e, as the Standard button-sewmg mac inc, and particularly to those of the specific type of Standard? machine shown in the a oresai'd application. In the construction illustrated the main frame comprises upper and lower portions, 2 and suitably connected and containing suit- 3 .ahle chambers, bearings ete, for the various operating arts. The main driven member, for examp e, is shown-as a fast disk, 4, associated with a loose pulley, 5, these being, as usual, in the form of hand-wheels. to ermit them to be readily mani ulated. he disk 4 is carried by a suitab e main shaft (not shown) having at its extreme forward end alooper, such as 7, of well-known chainstitch type. Associated with the disk Land pulley 5 is so'me'suitable meansfor starting and stopping the machine; 8 and 9 designate respectively the usual needle and needlerbar, the latter of which is intended -.tobe operated from the main shaft .,sub-. stantially in the well-known manner. ,Suitable 'r'neans are also employed for eifecting the tensioning, taking-up and guiding of the" thread in the normal operation of forming suecess1"" "ve stitches, 11 and 12 indicating a pair of tension devices locatedon the button-sewing ma hme, 'in p on they r a. w" siau mms apping issass,=o .v I hereinbefore "reh m s 1 the :same 110811310118 as of :thezi'liachine', with the t r l" rams t re" and 1 0 etin the, three eelemp s ev e. m n e.

tia

of the machine ,arm, the second being the usual automatic tension deities, while 13. is 'a-jt esp-fl a ed and a es ythe needs-bar, anal-'4, 15, 16; 1T'and 18 'are a eries of for properlydii c gz he t read n i pass ge fr m ours e he' fl e, b ng e s bs anrim rcoh r io an rew; {as found ,in machines oflthis machinesthere is also adjacent tdtheneed and. looper a suitabIe-work holder or but clamp, which is or may be suhstan al similar tothose of prior machinesQanj' tieularly to that shown in the aforesaid pplieation, this button-clamp "being desigf nated, f ner'all'y by H.

. Refs ,ingflfirstto Figs. 1 and"2, t in the needleathrea-d', which in this eas I machine. This thread is passed thro ,gnides, tension devicea -j take-up d 1n the mannerillustr'ated'in the -v 'le thread "f a. chain-stitch button sew In o in'juxtaposition with the. forward side of briefly" described.

machine on the work, and at the beginning,

On the st ping of the machine the operator thenvusua 1y has to perform one or more operations manuallyin order to complete the ork being done at one point. in the length ofthe material. operated upon, and

then has to shift thework to a new position.

Before considering in detail the manner in which thethreadis to be acted upon on the stoppingfof the machine, the" mechanism pre erably employed for bringing about the automatic stopping of the machine'will be,

A A "the beginning of the operation of. the

of theoperation of making any new series or group of stitches in the work, as, for example, in sewing on a button, such as b, the

mechanism for starting and stopping the machine will be in the, position shown in. Fig. 1. The main element of this mecha nism is, of course, the disk 4. In the present case, asv in the aforesaid prior application,

this disk is intended to be engaged at oppositesides thereof when the machine is to be automatically stopped. Two braking surfaces iare provided for this purpose, which surfaces are of course clear of the driven-1v member 4 when the machine is in operation.

\ They serve to clamp the disk 4 between them at the proper moment, this action being preferably controlled by a strong-spring for applying-them substantiallyinstantaneously I to opposite sides of the disk 4-'When the machine is to be stopped. Here the disk 4 and pulley 5 are forced into engagement with each other by'a suitablersta-rtin lever, 19, having in line with the center 0 the pulley 5 a cone-pointed pin, 20, holding the two r intended to be moved together in opposite pulleys firmly together during the time that the operator desires the machine to be runnin Another lever, such as 21, of substantial y ringform, surrounds the disk 4 and pulley 5 and is substantially parallelwith I p the lever 19. These two leversare pivoted at their lower ends to the lower frame portion 3 of the machine. At its upper end the starting lever 19 has a forwardly and downwardly extending or overhanging arm, 22,

the inner face of the depending portion of which carriesa suitable braking device, 23,

the'disk 4. The ring-shaped lever 21 has near its upper side a corresponding braking device, 24. The two levers 1 9 and 21 and the braking devices or pads carried thereby are directions, the main portions moving away from each other to apply the brake and to- \vardf'each other when the brake is removed and the pulleys coupled together. Any suitable means may be employed for operating vsaid levers in this manner, provided it is such' as to effect a quick and powerful application of the brake. Here a toggle connection is combined with a strong spring, 25,

the spring serving to apply the braking de-; vices quickly to the disk 4hwhile the toggle serves to obtain apowerful grip through said braking devices upon opposites; sides of said disk. The togg e connection shown com rises links, 26 and 27, connected respec-' tive y to the starting lever 19 and to a fixed point on the upper frame member 2. At

their point of connectionthese links. are also pivoted to athird link, 28, the upper end of which is pivoted to a rock-arm, 29, on a rock-shaft, 30, journale'd in lugs at the upper rear end'of the mainframe 2. This rock-I shaft also has secured toits frontend two rock-arms, 31and 32, and at its rear enda rocking pawl, 33. The rock-arm 31" is in;

tended to be operated by connections'from a treadle or other suitable part to start the machine, while the pawl 33 constitutes one element of a holding device or detent adapt ed to beengag'edfl by a complementary element, such as the hooked upper end 34, of a long lever, ,35, pivoted near its center on a suitable fixed part of the frame and having itslower end faced or beveled, as indicated at '36, to cooperate with tripping means for 1 L bringing abouttheautomatic stopping of the'machine. The rock-arm 32 is connected by meansof a rod,-37,'""to the free end ofa rock-arm 38" secured'to one end ofa rockshaft, 38, journaled in bearings at the rear 38" for operating a pair of substantially horizontal links, 39, the rear ends of which are connected to the ring-shaped lever 21.

near the upper end thereof. The construction and organization of these parts are such that when the starting lever ismoved. rearwardly or in a direction to release the driv ing'pulley from the driven disk the toggle is straightened and at the same time the links end of the'machine.andcarrylng eccentrics 39 are moved forward slightly, theirmove- 'ment being small as compared with the rear' ward movement of the starting lever, and

the two braking devices 23 and 24 are brought instantaneouslyand with powerful a combined spring and toggle act pn' into osite. sides of braking engagement with o i the disk 4 to stop the mac me. The machine isintendedto be, stop ed each time :with all of the parts in a pr etermined position, to wit, with the take-up 13 in a raised position and the needle at-or about the limit of its up stroke, in readiness forthetaking of 1 the first stitch of the next succeeding series. The means used is a-wedge, such as 4',- on 1' the disk 4 for increasing the friction opposed eter-' to the rotation of the parts at a pre mined point. It cooperates with the braking I i 125 the braking surfaces and bring the Inal- V gradllg ated action, to a stop at theexact point desired. To start the machine'the o ra'tor devices 23 and 24 to wedge thefidisk between chine quickly, but with a properly presses a treadleor otherdevice and t rough mediately brin 34 of the lever 35, when it is engaged b a hook said hook, as-shown in Fig. 1, sai being normally forced toward saidpawl, as

by means of a spring 40. This movement of the rock-arm 31, etc., serves to strike the toggle and withdraw the braking devices from the opposite faces of the disk 4, and in these positions the parts are held as just described until the lever 35 is tripped automatically on the completion of a predetermined series or group of stitches.

Any suitable meansmay be employed for tripping this lever. Preferably the tripping means is operated from the main shaft (not shown). through a cross-shaft 41, driven from said main shaft by gearing (not shown) by means of which a relatively slow rotary movement is imparted to this, crossshaft. On the completion of the predetermined grou of stitches the cross-shaft is intended to ring into operation a releasing device. This releasing device is shown as carried by a disk, 42, and 1s in the form of a radial pin, 43, slidable in and out of operative position and suitably held in place. When projected into the position shown in Fig. 1 the pin serves to trip the lever 35 automatically once at each rotation of the disk. When not pro'ected the ma:

chine may be used for straig t-away stitching. When the pin 43 reaches the position shown in Fig. 2 it rides over one of the beveled faces at the end 36 of the lever 35 and rocks said lever, releasing it from the pawl 33, whereupon the spring 25 will imabout the automatic stop-- pir ig of the mac ine as reviously described.

he parts just s eci-cally described are, as before stated, su bstantiall those of previous machinesof this genera class and ticularly of the machine shown in the a o said application. From any .suitablepart of the mechanism so described the automatic control ofthe thread-clamping and pull-off devices before referred to may be effected. In this construction, however, the automatic stop mechanism of said rior machine is utilized for this purpose. n order that it may be so used the shaft 30 is illustrated as having in addition to the parts previously mentioned, a cam,44, movable from the position shown in Fig. 1 to that illustrated in Fig. 2 for the purpose of actuating connections between said cam and the thread-clamp, pullofi devices, etc. The connections employed may be any suitable for the purpose, 'rovided that the timin of the operation 0 the arts actuated there y is that which is herein described. The specific connections shown comprise a lever, 45, secured ma fixture at the upper rear end of the frame of the ma.-

chine and the lower end of which cofiperates dlrectly with the cam 44 while the upper end is in position for engaging and actuating a controlling member, such as a rod 46, mounted to slide in guide-wayppreferably at the upper side of the mac inc and extending from the front to the rear thereof. Various guides for said rod are indicated at 47 48 and 49. A stop is shown at 50 for limiting the rearward movement of this rod, the forward movement being determined by the throw of the lever 45. In this construction the rod 46 constitutes the immediate actuator for various elements in which the main features ofv the present invention are embodied. One of these is a suitable threadclamp for clamping the thread automatically on the comp etion' of a predetermined group of stitches and the consequent stoppm of the feed movement of the thread,

whi e another is apull-ofi device for auto- 1 matically pulling ofi from the source of supply a suitable length of thread for the first stitch of a new series, and two others shown are a device for automatically releasin the automatic tension device of the machine and a pull-ofl" device in"the-form of a, check-spring for automatically drawing up through the e e of the needle the long depending severe end of the' thread after said thread has been properly clamped and severed.

In the machine shown in the aforesaid application the thread-clamp and pull-oil .devices were manually actuated by the. operator in predetermin timing and the thread was severed after such manual clamping of the thread following the completion of a group of stitches and the knotting of the thread. In the present machine these devices are not operated manually but automatically in predetermined timing, and the functions of clamping the thread and pulling, oif thread for the first stitch of a new series are entirely separated from the function of after the clamping and pulling ofi operations have been fimshed. 1:

The thread-restraining device'or thread clamp for clamping the thread on the commanually severing the thread, lwhich; severmg operation may take place at "any; time pletion of the predetermined group of stitches may be of any suitable type, but is here shown as comprising fix which is fixed to the front plate of the ma:

chine, while the latter is illustrated as form- '5 and 6.)-

ed and movable p g j w 52 and 5a, the former of At its upper end this angle ever has an opening in which the actuatingrod 46 works, the movement of this lever being controlled by said and by a spring, 57, thereon .workin between the upper end of the lever which 1s normally stopped against a head, 58, at the forward end 'of said rod and suitable fixed stop. In the normal position, shown in Figs. 1 and 6, this threadrestraining device or thread-clamp is open .tion shown in and. the rod is in its retracted pos'itlonn When the detent 33 is released, however, said rod is shifted uickly forward to the posiigs. 2 and 5 in which "the spring 57, which actuates it to that position,

holds-the mo able member of the threadrestralning device against the fixed member 52. and clamps the thread in place be tween them; Thcthread is, of course, released by the return of the rod to its normal 3 position, that is, by the resetting of the Pa s I J a The rod 46 also carries in this casemeans for operating, a "pull -ofi device for pulling off sufiicient thread for the first stitch of anew group or series. This pull-oil device also may be any suitable for the purpose.

It is illustrated at 59 as an angle-lever movable in a substantially horizontalvplane a and having a vertical finger, 60, for engaging the thread and pulling itaside from 1ts normal position to the dotted line position indicated in Fig, 4 topull oil the necessary length of'thread. The short arm of thislever isshown as. bent and pierced for the receptionof the adjacent portionfof the putunder compression between a fixed stop red 46, a spring for normally holding this pull-01f device, in, the full-line position shown in Fig. 4, beingillustrated at 61. As shown, this spring is normally extended to hold the pull-01f devicein the position indicated by full lines in Fig. :4. When the pawl 33 is. tripped, however, said spring is face on the head of the machine and a stop face on the rod 46. The stop on the rod is preferably adjustable and is illustrated at 62 in colnjunction with means, such- 63, for locking it in any deSll'fldfldJllStBd position fora-e lating the length of throw of'tlie pull-off evice and thereby the length of thread drawn oil from the spool or thread-supply. It will beobvious that the spring 61 Wlll bereleased and, expanding, willrestore the pull-off device to its nor- A mal position when the parts are reset for a: new series of stitches, as shown in Fig. 1. The automatic tension device 12 at the .momentithe' pufisofl' device 59 is operated to matic tension device12 for the purpose of,

releasing the tension. Normally this deviceis retracted to a position in which it exervice, in the form o cises no control over the automatic tension device, it being held in tlllSjllOIIIlfil position,

as, for example, "by means of: a suitable spring, 65, between a cheek ofthe combined a v guide and bearing'48 and one face of the releasing device itself. Normally this spring is extended as shown in' Fig. 1, but when the machine is stopped b the tripping of the detent 33it is put un er compression as illustrated in Fig. 2.

In addition to the thread-clamp, the main pull-01f device, and the release for the automatic tension device just described, the con,- trolling rod 46 also preferably governs; the

o eration of another ull-ofl' or take-up de- I a check-spring, for pulling back the thread t through the eye of the needle a predetermined distance after the same has been severedat' the work. The device employed for this purpose is shown in detail at 66 in Figs. 5 and 6, from which it will be seen that it will operate during the regular operation of the machineto perform the usual function of a check spring, a

that is, controlling or taking up slack thread during the descent. of the needle, and "also serves, on the severing of the thread at the work, to perform the additional function of pulling back the severed end of the thread through the eye of theineedle until only asuflicient length. of thread is left beyond said eye to permit. the proper formation of the'firststitchof a newseries. v

From the foregoing description of the thread-clamp, thepull-oif devices, and'the release for the automatictension device, 1t

will be seen that the rod 46 exercises, a through the action of a suitable part of the mechanism of the machine, which in this instance is the stop motion, an automatic control over the action of all of these parts which are therefore caused to operate 1n a predetermined timing. The timing in I this case is such that on thejcompletion ofthe predetermined series or group of stitches,

anism is substantially finished,the thread is first clamped by the thread restraining device 52- 5 3, the automatic tension 12 is then released,the pull-ofi device 59"between' this tension device and the thread-clamp is actuated to the position shown in dotted lines in Fig. 4 to draw 05 fromthe source" of supply a suitable length of thread, and the sec ond plull-ofi device, or check-spring, is brou t into position and ut under tension (see i 2) so that .it wi 1 be in condition for ul ing up the loose end "of out e severingof the same. a

The severing of the thread ma be performed substantially infthe usua manner,

the; thread that is to say, by a suitable manual 'or 110 a and when the action of theneedle-barmechtreadle connection to the usual 0 crating lever, 67, connected to the buttonamp by a suitableconnection The severance of, said thread close to the under side ofthe work- What I claim is 1. A sewing machine, comprisin means for forming a group of stitches sai means including a needle, a work-holder, means for severing the thread, a thread-restraining device cooperating with said severing means located in positlon for clamping the thread at a point above said needle, and automatic means for rendering said thread-restraining device efiective on the completion of saldgroup of stitches and the stopping of thee-feed of the thread.

2. A sewing machine, comprisi means for forming a oup of stitches sai means including a nee 1e, a,work-holder, means for severing the thread, a thread-restraining de vice cooperating with said severing means located in position for clamping the thread at a point above said needle, and automatic means governed by said stitch-forming means for rendering said thread-restrainin device efiective on the com' letion of sai grou of stitches and when e action of the need e-bar mechanism is substantially finished.

3. A sewing machine, compris' means for forming a cup of stitches sai means including a ne e, a work-holder, means for severing the thread by the lifting of said w-orkholder, a normall inefiective threadrestraining device opera le independently of said severing means located in position for clamping the thread at a point above said needle, and ,automatic meansgoverned by said stitch-forming means for rendering said thread-restraining device efiective on the completion of said group of stitches and when the action of the needle-bar mechanism is substantiall finished.

4. A sewing mac ine, comp'risingmeans for forming a group of stitches, a workholder, means or severing the thread, a thread-restraining device cooperating with said thread severing means, a pull-01f device independent of said thread restraining device, and automatic means for rendering said thread-restraining and ull-oif devices elfective on the completion 0 said group of stitches. v

5. A sewing machine, comprising means for forming a grou of stitches, a workholder, means for li ing said work-holder, a thread-restraining device to positively clamp the thread, a pull-off device between which and the work-holder said thread-restraining device is located, and automatic means for rendering said thread-restrainin device efiective on the'completion of sai groupof stitches 6. A sewing machine, comprising means for forming a of stitches, a workholder, means a thread-restraining device to positively clam the thread, a pull-ofi device between which and the work-holder said thread-restraining device is located, and automatic means for rendering said thread-restraining and pull-01f devices efl'ective on the completion of said group of stitches.

7. A sewing machine, comprising means for forming successive groups of stitches said means including a needle, a workholder and means for automatically stopping the machine upon the completion of each group of stitches, in combination with a thread-restraining device to positively clam the thread at a int above the needle, a flu -olf device, an means for automatica y rendering said thread-restrainin and pull-olf devices successively efl'ective 1n the order named upon the completion of each group of stitches.-

8. A sewing machine, comprising means for forming successive groups of stitches said means including a needle, a workholder, and means for automatically stopping the machine upon the completion of each group of stitches, in combination with a thread-restraining device to itively clam the thread at a point above t e needle, a p Loif device between which and the work-holder said thread-restraining device is located, and means for automatically rendering said thread-restraining and pullofl' devices successivel efl'ective 1n the order named upon the comp etion of each group of stitches.

9. A sewing machine, comprising means for forming suve grou s of stitches said means including a n la a work-,

holder, and means for automat cally stopping the machine upon the completion of each group of stitches, in combination with a thread-restraining device to positively clamp the thread at a point above t e needle, a ull-ofi device operatively connected with said thread-restraini device, and means for automatically ren ering said thread-restraining and pull-off devices successively effective in the order named upon the completion of each group of stitches.

10. A sewing machine, comprising means for forming successive groupsof stitches said means including a needle, a workholder, and means for automatically stopping the machine upon the completion of each group ofstitches, in combination with a thread-restraining device to positively clamp thethread at a point above the needle, :1 pull-0E device connected with said thread-restraining device and between which pull-off device and the work-holder said thread-restraining device is located, and means 'for' automatically rendering said u f r liiting said work-holder,

cessively effective in the order named upon thread-restraining and pull-off devices suc the completion of eachgroup of stitches.

11, A sewing machine, comprisin means for forming a group of stitches sai means including a needle, means for automatically stopping the machine upon thecompletion of said'group of stitches, means for severing the thread, and automatic means operative subsequent to the stopping of the machine 1 and prior to the restarting of the same for pulling the severed end of the thread backward through the eye of the needle a pre determined distance. a

" 12. A single thread sewing machine, comprising means for forming a group of stitches said means including aneedle, means for automatically stopping the machine on the completion of said group of stitches, means for severing the thread at the under side of the work, and automatic'means operative subsequentto the stopping of the ma- 1 chine and prior to the restartin of the same for pulling the severed end 0 the thread backward through the eyeof the needle a predetermined distance.

13. Asewing machine, comprisin means I for forming a groupof stitches sai means for. forming a group of stitches sai including a needle, a work-holder, meansfor severing the thread, a thread-restrainingdevice, a take-up device for pulling the severed end of the'thread backward through the eye of the needle a predetermined distance, and

-means for automatically rendering .said

thread-restraining and take-up devices suc+ cessively efi'ective in the order named on the completion of said up of stitches.

14. A sewing mac ine, comprisin means for forming a group of stitches sai means including a needle, a work-holder, means for severing the thread, a thread-restraining ide a vice, a spring take-up device for pulling the severed end of the threadbackward through the eye of. the needle a predetermined dlstance,and means for automaticall rendering said thread-restraining and ta e-up devices successiveljy effective in the order named 3 on the completion of said group of stitches.

15. A sewing machine, comprisin means means including a needle, a,workholder, means for .severing the thread, a thread-restraining device, a pull-oif device in the rear of said thread-restraining device, a take-up device in front of said thread-restraining device for pulling the severed end ofethe thread backi ward through the eye of the needle apre determined distance, and means for automaticall renderlng said thread-restraining, pull -,0 and takeup devices successively effective in the order named on the completion of said groupof stitches,

v16. A sewing machine,.comprising means for forming a group of stitches'and severing the thread on the completion of the'stitches of said group, a thread-restraining device, and automatic 'means m the rear of the hread-restralnm devlceand operative on )the completion 0 said roup for pulling off thread for a stitch w ile said thread-re .istrainiiig device is in its effective position, and automatic means in front of said threadrestraining device for. pulling back the severed end of said threadautomatically while I the thread restraining device is in said posit1on. p H

17. A sewing machlne, comprising means for forming a group of stitches, an'automatic'tension device, a work-holder thread severing means, and automatic meansinde pendent of said thread severing means for clamping the thread at the end of a roup of stitches and for pulling ofl thread 1n the rear of said clamping point; while the auto matic tension device 1s inits ineffective position.

18. A sewing machine, comprising means for forming a group of stitches, an automatic tension device, a work-holder thread severing means, athread-clamp independent of said thread severing advance" of'the'automatlc tension device, a pull-ofl" device between said thread clamp and the automatic tension device for -pulling off thread in the-rear of the thread-clamp means located in when the automatic tension device is in its inefi'ective position, and automatic means for.

rendering said thread-clampin and pull-off devices successively effective 1n the order named on the completion of said group 01"" v stitches.

19; A sewing machine, comprisingimeans for forming a group of stitches an automatic tension device, a work -holder, a con-: trolling rod, and means for automatically shifting said rod to its operative position on p the completion of said group of stitches, in combination with the following instrumen+ talities governed b controlling. rod an successively efiective. in

device in the rear of said thread-clamp.

said movement of the y the order named viz.-a thread-clamp, inde pendent of said tension device anda pull-off 20. Asewing machine; comprising means a for "forming a group of stitches, an automatic tension device,a work-holder, a controlling rod, and means for auotmatically shifting said .rod to its operativeposition on the completionof said oup of stitches, in combination with the idllowing instruxmentalities verned by said movement of said control ing rod and successively effective in the order named vim-a thread-clamp, means forreleasin said automatic tension device, andapull-o device betweensaid automatic tension device and thread-clampQ 21. A sewing machine, com rising means a for forming a group of .stitc es, an automatic tension device, a work-holder, a con troll ng rod, and means for automatically 13o [shifting said rod to its operative position cup of stitches,

on the com letion of said in combinaiton with the ollowing instruinentalities governed by said movement of the controlling rod and successively efiective in the order-named viz.a thread-clamp inde endent of said tension device, and a chec spring for pulling back the thread at the needle after the thread has been severed.

22. A single thread sewing machine, comprising means for forming a group of stitches .said means including a needle, a workholder, a thread-clamp to positively clamp the thread located adjacent to and above the needle and substantially in vertical alinement with it, a pull-off device for pulling ofi thread in the rear of said thread-clamp, means for rendering said thread-clamp and pull-off device successively effective on the completion of said group of stitches, and

means for raising. the work-holder while the thread-clam is in' efiective position to sever the three at the under side of the work.

23. A sewing machine comprisi stitch forming means, a thread tension, an a pair of complemental thread breaking devices both located above the work, mechanism for actuating the stitch forming means, connections between the actuating mechanism and one of said devices for actuating the latter, and connections for manually operating the other of said devices. v

Signed at Cleveland, in the county of Cuyahoga, and State of Ohio, this 14th day of May A. D. 1912.

GEORGE W. NELSON. Witnesses:

CHAS. C. EMMONS, H. R. KNAPP;

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