USRE410E - Improvement in sewing-machines - Google Patents

Description

'.22, A. "D, '1856, have been A combined in a double-,loop

1C. TOlVNSlLYD, OF BOSTON, MASSACHUSETTS, ASSIGNEE OF A. SWIGLE.

IMPROVEMENTIN SEWING-MACHlNES.

Spvcilicntilm forming part of Letters Patent No. 15,3%, aal-fai .my 22,

lrf; Reissue No. 4 l0, lated November' 4 1856.

To cal w/wm t may concern:

Be it known that ALFRED S'wrNeLE, late oi' Boston, in the county of Suliolk and State of Massachusetts, invented a new and Auseful or Improved Machine for Sewing Leather or other Material, such being particularly adapted to sewing with two waxed threads; and whereas Letters Patent ofthe United States of America, numbered 15,396, and bearing date July granted to me, EL- MER TowNsEND, of the aforesaid place, 'as the assignee oi" all the right, title, and interest of the said SWINGLE in`the said machine or inve1ition 5 and' whereas Said Letters Patent have been deemed inoperative or not fully available by reason of an insuilicient description or speciicati'on :,N ow, therefore,l I, the said ELMER TOWNSEND, do hereby declare' the said niachine or invention to be fully or more perfectly described and represented in the following specification and the accompanying drawings,

l of which- Figure l exhibits a top View of said machine Fig. 2, a front elevation ol'it; Fig. 3, a bottom vor under side view; Fig. 4., a transverse and vertical sectio11,`taken somewhat in front of the hook and looping-needle and so as to exhibit them; Fig. gitudinal section of the machine. In the said machine I perform the operation of sewing by by them what is termed thedoub1e-loop stitch. I do notclaini as the invention of the said SwlNenE making withtwo needles and two threads a'double-loop stitch wherein the loops are upon one side of the sewed material or cloth. ANor do I claim as the invention of the said SwiNGLn making a seam or uniting two pieces of cloth by nieahsof two threads so stitch that the loops ot' the thread may be enchained on one side of the cloth, whilea single thread only will be exhibited-on the opposite side of the cloth,` as

'such have been accmplished and made sub jects cfa-patent granted February 22, A. ',D.

alleged to have been y 1853, on an invention made by NVilliam H. Johnson. In suchmode of sewin g with two needles they were arranged' toop'erate on opposite sides of the cloth-that y istosay, the needleffor puncturing the cloth made to enter the same atthat .side ofthe o, a `central vertical and lon-vv of a common needleinade with an into the cloth at means of two threads and form i motion. AB. The cloth or leather to be sewed is shown cloth opposite to the one on which the other or 'looping needle was disposed.

In carrying out the said SwiEeLEs inven tion or improvement on such mode oise-wingv or on mechanism to effect such, I employ to enter the cloth or material a hook in the place eye eXtending through it near its point, and I arrange said hook so that when operated it shall pass the same side of the cloth on which the looping-needle is situated and works.l By so doing I gain important advantages, as I am enabled t0 operate or sew with waxed threads, and to'so closely draw into the clot-h ormateria-l the leave but three layers of thread on one face of the cloth, whereas when two needles are employed four layers of thread are so left. Besides this, the hook, during the process oi drawing a loop through vthe cloth, passes entirely below the path of the looping-needle, presenting the loop' to it to great advantage,

and so moving out'of the way of the loopingneedle asto overcome the liability of said nee die being carried into contact with it, so as to become broken or injured. Other advantages might be enumerated as resulting from the Y employment of 'a hook and its peculiar ar-y r( ngement and operation'with respect to the cloth and looping-needle.

.In the drawings, A is the bed-plate o r table ofthe machine; B, the-hook or hooked needle,l7 as it is so netimes called; C, the awl or piercer arrang above the hook; I), a loop ing-needle; E, a clamp for holding the leather or'material to be sewed. F is a bearer or curved rest, as ,ranst which the elampis borne; during the operation-of sewing with the machine, and on which the leather rests while- .beingllsewed -G isa friction presser or wheel pressed down upon the clamp for the purpose ofkeeping it in place when the machine is in H is the thread-carrier for the hook by redlines at I I in Figs. 10 and 5. The hook- B is supported in a carrier, K, to Which vertical. motions are imparted by a grooved cam, L, fixed-'on the driving-shaft M,

` a view of said cam being givenl in Fig. (i.

'The hookf'carrie'ris supported by a carriage, N, fromwhichastud, YO, projects and entends.

thread of the hook as to in the grooveof the eam-L enable its hook to be turned around while it is neath said barb. In order to accomplish this hook has a helix groove, a, formed init, as

hook and its carrier. jection or stud,.b,"

' but to guide it, during its vertical movements.

. ner in which the thread extending from a y and needle, and representing the parts or feed- 1 be operated or moved by'al -grooved cam, W iixedrupon being made to extend into the groove of the? the awl and thread-carrier lof the hook does? notdrider essentially from such as is in common use for such purpose.

' bars a rack of teeth Y gear, z,

.l The hookear` rier Valso has a partially-rotary motion in a.

horizontal direction impartedfto itin order to rising upward, and so as to bring its barb intov a Convenient position vfor the" threadcarrier to lay the threadacross the hook and Inder-f last motion of the hook, the carrierof said.'

seen in Fig.,f7, which 'is a side view of thev Into the groove a proextending from the lsupy Fig. 5) enters, the" said m being formedl so as not only slide forcarriage of the carrier,

portingarm P A(see supporting-ar to sustain the The looping-needle D- `s constructed as shown in section in Fig. 4,1also in'top view in Fig.A 8.' Itshould be made of springsteel', and may have .two eyes or threadguides formed through it, .as seen' at` c and d, and particularly in Fig. 9, whichis a horizontal section of the needle, and exhibits the 1nan bobi n. 1854, the

ori-,the 'shaft yof the feed-wheel and has a refciproeatin'gmotion iniparted.t0 it by means 'of a stud, e, anda-grooved plat-epm, `work-ingr intheslot or groove-of said plate, -and projecting from the superior arm of the long lever- U. The yslotted plate in whichl said studoperates-Viscarried by or fastened kto the rocker ar'rn above mentioned. By .arranging the rack of the 'eeding-clamp on the vertical edge of said clamp, as described, and disposing or arranging the-pinion ofv said rack horizontally on` the top of the table, we are not only enabled ,to move theelamp longitudinally, but itis maintained close up to its guide or rest F; and, should the same be 'necessary, asis oftentimes the case, it Y,

moved a little` laterally-in order to accommodate the work or vary its position with respect toth'e hook, as occasion may, require.

.I am aware -of theprineiple of the inventionas patented by EdmundShaw, August 22, A.' invention of said SWINGLEin th'e' arrangement of the feed motion or mechanism being an improvement thereon, or one which bin, Q, is passed through said needle. The v needle 'is supported on the top of a lvertical projection or post, ltvwhieh extends from a horizontal slide or carriage. (See Fig. 3,also1 Fig. 10, which is a vertical andtransverse section ofthe machine, taken through the hook ing lapparatus infront of the saine.)

The slider S'of the needle is operated bymeans of two levers, `T and U, arranged as seen in Figs. 3 and 10, the `leverUbeing made to turn vupon a fulerum, V, (see Fig. 4,) andl 7 the driving-shaft, a projection or stud, d', from the interior arm of said lever cam. In Fig. 1l is represen-ted the form of` the groove. of said cam as it would appeary when .developed upon a plane surface. TheI mechanism which is employed for operating In this machine the clamp E for containing the leather or material to` be sewed has the necessary form given to it for holding the parts of a'boot-leg'in order to side up 7 the same. It is constructed of two bars or portions, cj", the upper of which is forced toward the lower by ymeans of screws and nuts,l as shown at g g; On lthe outer vertiealedge of the lower of said or cogs, h, is arranged, the same being made to engage with a feedingdisposed horizontally above the upper surface' of the table of the machine and fixed to the upper end of a vertical shaft, 7c, to which an intermittent rotary-motion is imparted by means of a ratchet-gear, Z, affixed .to the shaft. The said ratchetgear receives motion from a paw] or click, u, that is carried bobbin, a, arranged as seen in Fi tirely below secures new and important ladvantages in the operation of feedingVv the'leather or'material along during the.processv improvementbeing snbordinate to the device -which is the subject of the claim said Shaw in his patent.

ln operating with the -and is passed .through the thre said hook, the work or material to be sewed being sustained on the top surface of the support or restF. After the awl has descended and punched a hole through the Work the said and the hook follows up through said awl rises, hole, and immediately after the barb has been elevated above the work little toward the thread-carrier in order that during its next downwardv movement it'may seize the thread. the thread is drawn inl the `form of a loop through the the .horizontal needle, which next passes into the loop, and tTi-e'gremains long enough to permit the hook to risefand pass between said needle/and the thread carried by it. The horizontal needle next'falls back,` having looped its thread around the shank of the hook. Next, the hook loop down with it through the cloth and the loop previously formed upon its shank. Thus the operation double-looped stitch. produced, as hereinbefore described.

In consequence tant by the action-of a hook, and alter said hook has .passedont of the hole into which it has pulle the thread, it will readily be seen that it wi l operate to much better advantage than an eye-pointed needle in drawing"v its thread closely into the work, and for the reason `by a-rockerarm, r, which turns horizont-allyl that the needle while drawing a thread is al the stud may bej of sewing it, suchniade by the above-described v chine the thread for its hook ishtaken from/a:

1 and2,' -earrier ofv the hook is turned a On the'xlescent o'f the hook work, the hook descending endescends, as before, drawing a v of sewing is carried on and the of the thread being drawn 'ways in the holewith the thread, and par-kl ticularlyif said thread is waxed the friction of the thread against'the sides of the-'hole is so great .as to make it extremely diicult t6 draw thethread closely into the -work with- 'out dangenof breaking such thread. Thus when two needles are us'edfto perform the double-looped Stitch theloops f theneedle by Vwhich the materiaI is punetured enerally project from the cloth and interlo'c the other needle aboutmidwgyrbetween each two holes in thematerial, the same serving to produce agreater projection of the loopings upon the surface ofthe cloth-or materialthan `takes 'place when a hook is need in the place of the puncturing-needle.

Congeqne'ntly the improvement or machin- .ery formaking'gthe double-looped Stitch, and

what I claim as of the said SWINGLES invention isf N f the loops of v Witnesses:

1. The employment of ahook in connectionI With the looping-needle' and arranging said hook so that it shall pass into the cloth or ma terial from the same-side of it on which the loopingfneedle worksor is situated.

The hereinabove-described new` or improved method of arranging the feed motion orv mechanism, the feed-wheelthereof being disposed horizontally, and its teeth made to engage with those of therack situated on the vertical side ofthe clamp', the whole being` substantially as specified. y I In testimony whereof I have hereunto set my signature this 5th day 'of Augst, A. D. 1856. l

-ELMER TOWNSEND," Assignee QfHA. Swugle.

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