US77889A - Impkovement in sewing-machines - Google Patents

Description

2 Sheetf-Sheet 1.l 0. C. KERR. 8

Sewing Machine.

No. 17,889. v Patented May 12, 1888.

2 Sheets-#Sheet 2.

O. C. KERR.

Sewing Machine.

Patented May 12, 1868.

c D m. M n w. m m s u n P N.

@einen tsfs getint. @fitteA OSCAR o. KEER, 0E' PHILADELPHIA PENNSYLVANIA.

Letters .Patent 1No. 77,889, dated May 12, 1868; antedated .May 4', 1868:

IMPROVEMENT 1N- SEWING-MAGEINES.

To ALL WHOM IT MAY CONCERM- I I l Be it known that I, OSC/tit C. KERI, of Philadelphia, county Iof Philadelphia, State of Pennsylvania, have i invented an Improvement in SevinglMachines; and I do hereby declare the following to -be a full, clear,land

exact description of the same.

My invention consists of certainA sewing-mechanism, constructed,garranged, and operating in the peculiarl manner -i'ully described hereafter, so-as to produce stitches of. a novel character. p

I In order to enable others skilled in the art to make and use my invention, I will now proceedito describe its construction and operation, reference being had to the accompanying drawings, which form a part of this speci fication, and in whichi y v Figure 1 (sheet 1) is a side'elevation of my improved sewing-machine; Figure 2, asectional plan on the line 142, iig. 1. l Y Figure 3, a sectional elevation on the line 8 4, fig( 1. Figures 4 to 14 (sheet 2) are diagrams illustrating the manner in which thestitch is made. Figure 15, a view'illustrating the stitch produced when one thread is used; and Figures 16 and 17, viewspillustratin'g the stitches produced when twotihreadsare used; A is the base-plate, B the workLplate, ali C thefoverhanging arm ofthe machine, arid on a pin at the rear i of the arm G turns a driving-wheel, D,.a'cognheel,-E, nt 'the 4side of which gears with pinonsFF, thefformei;

being secured to an upper driving-shaft, G, turning in` the armi-@and the latter to a shaft, H, turning in projections a a on the hase-plate. l j i t i Beneath this base-plate A extends a shaft,I,- at the rear end of which is secured an arm, J; a pin, b, prov jecting from the latter into a groove in .a cam-wheel, K, secured to the sideo'f the lcog-wheel E.

To the'front end of the shaft G are secured two cams kL L; a pin projectingfrom the latter into a henri zontal slot inra needlehar, M, which slides in the front end of the arm C, and has at its lowen'end an eye-'- pointed needle, n; and on a rod, at the upper end of the needle-bar, turns a `bohhin, su, containing theuppver thread.' Y I y 'In the arm C, at the rear of the bar M, vibrates a lever, N, to the lower end of which is secured a serrated i presser-foot, N', and into an opening in the lever projects the. cam L', by Which'the levermis so operated that an intermittent. motion in the direction of the arrow (tig. 3) will he imparted to a fabric confined' between the A presser-foot and the, Work-plate. l

To the arln C is secured a spring-plate, d, one end of' which projects beneath a lip, c, on the lever N, and` to the side of the arm C is hung a lever, O, apin, d', on which projects beneath the plate i, and, when the lever O is elevated, bearsagainst an'd raises the said plate, and 'with it the lever N and'its presser-foot`.

To the front side of the projection a is hung a lever; P, into a slot in which projects a pin, onithe crankend of the shaft H,fand at the upperend of the lever is a pin, `e', which fits between'two projections on a rod,.

Q,Is1iding in a detachable block, B', secured to the underside of the plate IB.I At the inner end of the rod Q is o forked loop-holder, W, o ne prong or armof which is longer than the other, and has in' it two perfora-v tions, fo`r n. purpose described hereafter.

-The 'rod Q passes through an arm, f, which vihrates in an opening in the block B, a projeetionon the arm extending intoa longitudinal groove iu the rod, so that, although thelatter can slide freely in the said arm, one cannot turn 'independently of the other. v A y To the armfis connected one end of a rod, g, the opposite end of which is jointedto 'alever,'h, hung to the base-plate oi' the machine, a pin at ,the side of the said lever projecting into ar'gro'ove in a cam, R,ou`l the d'rivingshnft H. i i Y A `portion of the cam RJ is cutaway so as to forma second cam, R', against whichibears anarm, S, secured to a shaft, S', the latter extending through the projection a, and to thefront end of the said shaft. is secured the upper end of anarm, T

To the loweryend ofthe arm is jointed thelower end of a lever oryloop-carricr, U, vat the upper end of which are two projections z'z', and intola slot in the said loop-carrier projects a pin, m, on an arm, V, secured by a set-screw, 7c, to the front end of the shaft I, so as to be adjustable thereon.. l

On a rod, Xsecured at one end 'to the work-plate B, turns a bobbin,'Y, carrying, the lower thread When the driving-wheel D is turned in the direction of its arrow, a reciprocating vertical motion will be imparted tothe needle-bar. A vibrating motion will 'be imparted to the lever P, and also to the arm f, and the rod Q will be carried backvand forth in the direction of its length, and will also be turned a quarter of a revolu- ,tion and back at each motionl A vibrating motion willbe imparted to each of the arms Tand V, and the loopcarrier U will be' moved back and forth towards the needle, and will also reciprocate vertically to a slight extent.

Three different stitches, illustrated in figs. 15, 16, and 17, may -be-producedby the'ahove-described machine. When a stitch, similar to that shown in fig. 15, is to be made, the upper thread a: is passed through the eye of the needle n, and the parts of themachine are arranged as shown in g`. 3, the needle, loop-carrier, and holder are brought to the relative positions shown in iig. 4, when, the operation will beras follows:

The needle willfiirst rise, and the loop-holder will pass through the loop of thread x at the back of the needle, which continues its ascent while the loop-holder turns toI the horizontal position shown in iig. 5, thus distending the loop while the needle rises above thefabric. i l

The fabric now moves' the .length of one stitch in thc direction of its arrow, (lig. 3,) the loop-carrier U.

l moves forward in the direction of its arrow, (fig: 5,) so that the projcctions'i.' z' pass into the loop :awhile the needleagain descends through the fnbric infront of the loop, and between the prongs of the loop-holder W'.

The lloop-holder nowfrecedes from' the needle, disengaging itself from the loop, which, asthc needle continues its descent, is drawn up round the projections z' z', (fig. 6,) The needle 'then again commcnces'toascend, the loop-holder is'turned to a vertical position, andmoved forwardso as to penetrate the new loop, of thread at, the rear of theneedle', 7.) z 2 l v v As the needle `passes upward and fron contact with the fabric, the loop w', left upon the holder W, (fig. 8,) is distended by the latter, which turns to a horizontal position,as shown invfig. 9, after which the fabric moves inthe direction of the arrowlig. 9). the length of one stitch, l.and the carrlergU movies in the direction of itsv arrow, (fig. 10,) so that the projections z' z', with the loop :v upon them, are carriedthrough the loop The needle now 'descends between the projections z'z', through the loop x, and infront ofthe lo'op 1v', as shown in tig.' 11, after which` the carrier U moves back and upwards so that the projections 1.' are withdrawn from the loop x. The carrier'thon moves forward and downward, the projectionszo' passing into the loop x', while the holder` W rccedes from this loop, whichpis drawniroundthe projections, as sho-wn in iig. 12.

The holder now again assumes a vertical position, passes into anew loop,'.?r, at' the yrear of the needle,

(fig. 13,) the latter aseends, and thecarrier U recedesfrom the loop z, which isthen drawn close to the under v side of the cloth and rou-nd the central part of the loop x', while the latter encloses the ,new loop 2:, which is distended ,by thel holder W (fig. 14) prior t0 the projections t' i passing into the saine, as shown in fig. 5.; after which, the above-described operations are repeated, producing a stitch similar to that shown in figll.

When a moreornamental stitchl is to be made, thelower. thread y ispassed through-the perforations in the loop-holder W, the inachine is operated as above described, when a loop of thread, y, will be carried through each ofthe loops and round onepart ofthe latter, as the holder penetrates the said loop, and the succeeding loop :v willv be carried through the loop of underthread as the-needle descends,'a stitch, similar to that illustrated in tig. 16, being thus produced A l Another'stitch may :be formed by moving back the arm Y (the set-screwxc being rst`loosened) until'the projection m is free freni contact with the loop-carrier, and then adjusting the carrier to the 4 position shown 'in fig; 3,'red lines, out of the way of the threads. .The lower thread is then p'assed through the eyes of the holder, and the machine is set in operation, when the holder, withits loop o'f under thread, `vill be passed through a loop of needle-thread, and the needle, at its next descent,will pass through the loop carr'icdt by the holder. The holder is, then withdrawn through tlieloop of needle-thread, leaving -a loop of thread, y,`in the same, and moves forward into a new loop at the side of the needle; sthestitch thus formedbeing represented in iig. 17

Although I have illustrated in lig. 15 a peculiar forni of stitch, and havedcscribed the manner in which' it may be produced, I do not here claiml the same,as it will form the subject of another applibation for a patent.

`Without coniining myself to the preciso. construction and arrangement'of parts herein described, I claim as Anly'invention, and desireto secure 'by,LettersIntent--v u 1. A loop-carrier, U, constructed'substantially `as described, and operating in conjunction with an eye l pointed needle and a' loopf-holder, W, to produce', from the needle-thread, the stitch, iig., 15, in the manner set forth.A v

2. A needle, n, ano. loop-holder W, in combinationv withan adjustable loop-holder, U, the whole being constructed and operating substantially as and for the purpose specified.. o

In testimony whereof, I have signed myname tothis specification in the presence of two subscribing witnesses. f "OSCAR c. Kenn.

v Witnesses: 'Y

CnAnLnsE. Fosrnn, Y A W. J. Rf lDnLANY.

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