USRE9698E - Chester - Google Patents

Description

'3 3 Sheets-Sheet 1. S; SAWYER 8!. W. ESTY,

, Assignors by mesne assignments, EOTHE AMERICAN STAPLE SEWING MACHINE G0.

Machme'fqrsewing Shoes. No. 998. Reissued May 10,1881.

Wz'tneses. T19 L In w-eniors;

Vamp/A S. SAWYER & W. ESTY Assignors by mesne assignments, to THE AMERICAN STAPLE SEWING MAGHINE G0.

a Sheets-$119M, 2.

Machine for Sewing Shoes. No. 9,698.

Re issued May 10,1881.

Fig.

3 Sheets-8heet 3.

'SQSAWYER-SL w. ESTY. Assignors by mesne assignments, to THE Amman STAPLE Sswnm MACHINE 00.

Machine for Sewing Shoes." No. 9,698 Reissued May 10,1881.

Witnesses; Fig.6, 72 went/Ms. W WM by. MQ/M 0 ufttorney.

I ment of a presser-foot upon the side of the needle opposite to the feed-point and adapted to bear uponthe last stitch made, in combination with a feed-guard mounted upon the same bar withsaid presser-foot, and movable therewith, and adaptedto serve as a guard to the feed-point.

Our invention further consists in a peculiar device for lifting the resser-foot from the work while it is being fed, whereby the presser-t'oot is always lifted the same distance above the surface of the stock, whatever may be the thickness of the stock. For this purpose the presserfoot'bar, which has its lower end square or of suitable shape in its lower bearing to prevent rotation thereof, is extended upward some distance above the cam-shaft. This upper end is made round and provided with a spline-groove to receive a feather set in the socket of an arm fitted to embrace said rod, so as to. slide freely thereon. This arm is slotted andcontains an elbow-lever, the perpendicular arm or we of which is provided with a series of fine teeth on the side contiguous to theside of the presserfoot bar, which is also provided with a series of similar teeth. The arm rests upon the hub of a cam on the cam-shaft, against which it is pressed by a spring surrounding the upper end of the presser-bar and pressing upon said arm. A cam acts upon the horizontal arm of tllB'BlbOlV-lBVOI, and, raising it, causes its teeth to engage with the teeth onthe presser-bar,

and then raise the bar and presser-t'oot. Our invention further-consists in mounting the feed-point bar in avertical position in suit able bearings in a plate arranged to be recipro'cated' in a horizontal direction by means of acam and lever, .or their equivalents, in com-,

- binationwith a cam-slot connected to or formed in the presser-foot bar, all so arranged thatthofeed-poiut-will be moved down an incline till it enters the stock andthen move in a horizontal line to feed the stock, byir'nparting a horizontal motion to said plate, the feed-bar being provided with a' projecting pin fitted to and workingin said slot. I Qurinvention further consists in so arranglng theneedle-bar, and feed and; combining .theniwith a reciprocating plate or bar that said plate or bar shall'opcrate the feed'point. and impart an intermittent semi-rotary motion abo ut its axis tosaidneedle-bar.

, 'Ouninyention furtherconsistsin so arrangin-g and operating a barbed needle, a whirl, or

othersuitableiloop-formin g device and feedin g .devicein asewing-machine that the needle shall enter the stock with'its barb. toward the ,fced -point, make ahalf -revo1ution about its axis, where it remains stationary till the whirl,

the thread-hole in which is on the right of the needleyor on the same side as the feed-point, has made a complete rcvolu tion about its axis, carrying the thread around the needle above the barb when the needle is moved upward,

the barb engaging with the loop formed in the thread and drawing it up through the material. The needle is then turned back a halfrevolution, so that the barb is again ontlie side toward the feed-point and still engaged with the loop when the feed-point is moved toward the needle,-moving the stock with it a distance equal to the desired length of stitch. The needle now desceuds as before, still holding the loop 'just made, turns as before, and, rising the second time,draws up the second loop through the first without danger of catchin g the thread of the previous loop, and so on, making a perfect chain -stitch without employing a castoff.

()ur invention further i'onsists'in so arranging'and operating-a barbed needle, a whirl, 'or other suitable loop-forming device, and afeeding device in a sewing-machine that the needle shall enter the stock with the barb on the side farthest from the fced-poin it, make a half-revolution about its axis,where itremains stationary till the whirl or looper has carried the thread around the needle above the barb, from a point upon the side of the needle farthest from the t'ecdpoint to the same point again,

when the needle is moved upward, the barb engaging with 'the loop formed in the thread and drawing it up through the material. The needle is then turned back a half-revolution, so that the barb is on the side farthest from the feed-point. The feed-point is now moved IOO forward, carrying the stock with it, and as the barbot the needle is turned away from the bite of the loop the loop is pulled off from the needle, and the needle, in its next descent, en-

ters the stock outside of the loop, between itand the feed-point, the portion of the loop projecting above the stock being forced under the presser-i'oot, by which it is held from bei-n g drawn out by the needle in drawing up the next loop, thus forming a series of loops,drawiitg; them through the material and releasing them, and thereby forming a seam composed of staple-stitches, substantially like these describedin the Paton ts Nos. 124,293 and 135,047, granted to George V. Sheifield March 5, 1872, and January 21, 1873.

In the drawings, Figure l is a side elevation of a machine embodying our invention. Fig. '2 is a front elevation. Fig. 3 is a vertical section taken-on: line 1-1 on ,Fi 2. Fig. 4 is a partial section of the head on line 2 2 on Fig. Fig. 54s a horizontal section on line 3 3 on Fig. 2. Fig. 6 is a partial section on line 4 4 on Fig. l. 1 Fig. 7 is a horizontal section on line intermittent motion to thcwhirl.

Fig. 11 is a transverse section through the horn'on line 6 6 on Fig. 3. Fig. 12 is an elevation of the back showing the base of the horn in elevation, and

illustrating one mode of connecting the steampi pee in the born with a proper supply and discharge. Fig. 14 is a vertical section of thetip of the horn, and Fig. 15 is a horizontal section on line 7 7 of Fig. 14.

Ais the frame, mounted upon legs B B to raise the baseA' above the floor. v

O is a pipe-hearth g secured to the upper side of theprojecting portion of the base A, as

' shown,and serves to support the'horn l), which is so fitted thereto as to be so ceptible of be' ing rotated therein. The horn l) is made hollow to receive ,the necessary mechanism for operating the whirl, and has its lower portion inclined from a perpendicular at an angle of about thirty degrees, and its upper portion inelined in the opposite direction at an angle of about forty-five degrees. varied somewhat from the above by circumstances, such asa variable heightot the horn, &c. This arrangement of making the horn in the form of an elbow with both portions inclined to a perpendicular, but in opposite directions, is a great advantage in the facility with which the work may be manipulated,especially when it is desired to sew around the heel, which involves turning the boot or shoe on the horn.

E is the driving-shaft, to which power may be applied in any we ll-know n manner, and havin g tirml y secured thereto the bevehgear wheel a, which meshes into and drives a similar gear- .wheel, b, on the lower end of the vertical shaft '-F, located within the hollow of the frame A, in

suitable bearings for the purpose, and carrying at its upper end the bevel-gear wheel a, which meshes intoand drives a similar gear, d, on the rear end of the horizontal shaft G, mounted in suitable bearingsin the top of the'frame A.and carrying onits front endthe cams e and-f and the crank- 9.

His the needle-bar, fitted to receive a barbed needle, h, which is secured in any well-known manner. The needle-bar H is provided with a spliue-groove, h, in the upper portion of its length, to receive a feather set in the pinion 6, through whichthe said needlebar H is free. to move endwise, said pinion being prevented from partaking ot' the recipnbhatiu g motion of the needle-bar by being laced. between two portions of the cap'plate A of the frame A. 'lhe'needle-bar ii. is made cylindrical in form,

'- and has a bearing in the sleeve I, the exterior of which is made square, or of any other suitabl orm, ;n e'ross-sectiointo preventrotation thereof in its hearings in the cap-plate A. This sleeve isconfiued between tlvo shoulders oncollarsJ k, formed upon or secured to the The angles may be.

needle-barH in such a manner that thesleeve and needle-bar will reciprocate together,while' the needle-bar is free to be revolved within the sleeve. A small portion of the upper end of the sleeve I is made round, and has clamped thereto by the screw 1 the wrist-pin m, so as l I lower end of the pitman J is provided with a regulating-screw, o, for varying the time of contact of the pitman with the wrist-pin m in its upstroke,-a similar adjustment of the time of the pitman, coming in con tact with the wrist pin in its downward stroke, being obtained by adjusting the wrist-pin m at a. higher or lower point on the sleeve 1. This arrangement of the pitman of the crank makes a very cheap and efi'ective mode of obtaining an intermittent reciprocation ot' the needle-bar, and adjustment 0 of the length of the standstillof the needle.

K is a plate, titted to suitable hearings in the head of the frame A, and. partially covered and held' inplace by the cap-platcA. Said plate Kis provided with projections 11 g on its back side, in which is mounted, ina vertical position, the feed-bar L, and also has secured to its front side the toothed rack i, arranged to engage with and act upon the pinion i to rotate the needle-bar H. The plate K has an intermittent reciprocating motion imparted thereto by the cam c, acting upon the upper end of the lever M, pivoted to the frame or cap-plate A at r, the lower end of which is connected at s to thelink hi, the opposite end of which is pivoted to the plate K. The link N is connected to pin 8 by means of an open slot or notch, s, so as to be readily disconnected so as to move the plate K by hand. The length of strokeot' the plate K, and, as a consequence, the length of the feed, may be varied at will by adjusting thc'pin s iu'the lever M. The

IL, in which position it is retained .by the spring 10, the, purpose of said spring being to hold the feed-point in position to engage with the stock when feedings-n 1 to allow said point to rise and pass freely over the stock when it is being moved back-preparatory to feeding an- 1' other stitch.

P is the presser-foot, located upon the side :30 of the needle opposite the feed-point, and secured in any wellknown manner 1 1 the lower end of the presses-foot bar 1?, mounted in suitable bearin gsin the cap-plate A in such a man- ,ner that whileit is free to be reciprocated raised from the stock by the lever Q,which may be operated by hand or connected to a treadle beneath the base and operated by the foot. The bar P has adjustably secured to its lower end the feed'gnard R, which extends in a horizontal direction some distance beyond the needle-bar, (it being so constructed that the needlebar passes through it,) and is then. bent downward and inward towardthe needle till its point is about the length of the longest stitch from the needle and about level with the-upper surface of the stock, as seen in Figs. 2 and 12.

When the machine is making the staplestitch the guard R is so adjusted as to not press with force upon the-stock, its only officc then being'to serve as a guard for the feed-point; but when the chain-stitch is being sewed it serves the purpose of aprcsser-foot, as well as guard for the feed-point, the presser-foot P being then removed, andthe guard B being so the feedbar L.

adjusted'as to bear with suflicient force "upon the stock to hold it firmly in place.

S is a plate formed in one piece with or firmly secured to the guard B, so as to move with it when it is adjusted or when the presser-foot is raised from the stock by the action of the lever Q, and is provided with the inclined curved slot 0', which controls the downward motion of the feed-point u by acting upon a truck or roller mounted upon a pin, (1, set in the front side of The upper end of the presserfoot bar P is maderound and provided with a spline-groove, e, as seen in.l3ig. 7.

Tis an arm fitted to the round upper portion of the bar P so as to be free to move up and down thereon, andprojectin'g therefrom in a horizontal direction, with its under surface resting upon the hub of thecam f, as'shown in Figs.

1, 2, and 3. The arm T has a slot,f', (see Fig.

5,) cut vertically through it, extending outward from the eye which receives the bar P and has pivoted therein a small pawl-lever, g, the short tion of the motion of tl1e' cam f will cause the arm T, bar P, and presser-foot 1 attached thereto to be raised together. '7 NVhen the point of the cam f has passed from under the pawl g and armT, the arm T, bar P, and presser-foot P will descend again till the presse'r-foot rests upon the stock and the arm T rests upon the hub of the cam f. If thicker stock is fed under the presser-foot, so that it cannot descend to the point from which it started, the arm .T will de scend till it rests on the hub of the cam f, being forced along the rod P by the combined action of gravity and thetension of the spring h, thus automatically adjusting the presser-foot audits lift to the thickness ofithe stock being sewed.

The tip of the born I) has mounted in a suit- I able socket formed th'erein for the purpose the whirl i, provided with a central holefor the passage of the needle, and a hole, i for the passage"of the thread, said whirl having its upper surface cupped .out around the central hole, as shown in Fig. 14, and provided with bent pin 0 which has its hearings in the plate 0 and the upper end of the incline I shaft 70, i as shown in Figs. 3 and 14. The intermediate gear iiis alsoprovided with a series of bevelgear teeth, corresponding in number and size at their large ends with the spur-gear teeth, and arranged to engage with a bevel-gear, j, formed upon or secured to the upperend of the inclined shaft 70, mounted in suitable hearings. in the hollowof the upper portion .of the horn. To the lower end of the shaft k is secured a bevel-gear wheel, l, which meshes into and is acted upon by the bevel-gear wheel m, secured to. the upper end of the shaft n, inclined in the opposite dircctionto the shaft k, and mounted in suitable hearings in the hollow of the lower section of the horn D.

Upon the lower-end of the shaft a is secured the bevel-gear wheel 0, which meshes p, secured to the upper end of the hollow shaft qr, mount-d in a VBl'ilCal position in the base of the bprn D,'with its axis concentric with thejonrnal of said horn and in line with the axis of the needle-bar.

Upon the lower end of the hollow is secured the bevel-pinion r, havin g teeth formed around about threefourths of its cirshaft q i cuml'erence, and the remaining portion made smooth and tangent to-the pitch-'circle at a point. equidistant from the teeth upon either side thereof, as shown in Fig. 10. The pinion r meshes into and is acted upon intermittently by the'bevel-gear wheel U, of considerably larger. size than the pinion)",- and having the same number of teeth formed upon one side thereof as there'are spaces in the pinionr. The remaining portion of thewheel U is turned to the same bevel asthe teeth and to the same diameter as the pitch-circle, with the corners contiguous to the first space upon either side rounded, as seen at r r, Figs. 8 and 9. The wheel U is secured to the front end 'of'the driving-shaftE, and rotates about itsaxis, with its smooth surface in contact with the smooth straight or slightly concavesideof the pinion":

1* till the first tooth on the wheel U --s trikes. against the projecting corner 2 of. the pinion 1', when the pinion r -will be revolved by the continued motion of the wheel U till it has oscillation about its axis, a whirl or looper ill turned-a complete revolution, when its flat side again comes in contact with the smooth snr-- face of the wheeljU, and the pinion remains stationary till the corner 2 again engages with ftheforward-tooth in the wt A] steam-pipe, a, is place-i in the hollow of the horn D, bent as showm- One end of said communicates with the annular chamber a, formed in the interior surface of the bearin g (l,'throu'gh passage sfiformed in the base portion of the'hornwD,jand the other end in like manner through passage t, with the annular "chamber t in said bearing 0. The vertical s.- l t under side of the bearingO, (not shown in the ge s,.lesding from the' chamber a, .communicates, by meansof a pipe screwed into the suitable-place for discharging the waste steam andthe water of condensation. I

Instead of the chambers and passages'in-the bearingp, flexible pipes may be connected directly It'othe two'cnds of the steam-pipe 8 or to passages in the base of the horn D, above or below the bearing 0, leading to with suitable fixed pipes leading to the steamwaste steam and water. V

lfit isdesirable to make the staple-stitch, the relative position of the presser-foot, feedpoint. and needle are the same as shown in with the thread-hole in the'whirl to the die directly opposite the feed-point, and the operation is as described in the statement of invention.

. To make the chain-stitch thei presscr-foot P tion, what we claim as is removed and the needle turned in the necdle-bar so that its barb shall be toward the teed-point; as shown in Fig. 12, andthe whirl is removed from its beari n g, turned half round, and inserted iriits bearing again with the thread-hole between the' needle and the feedpoint, and the operation is the same as described in the statement of invention.

Having thus at length described our invenne'w, and desire to secure by Letters Patept ot'the United States, is

1. The combination, .in a sewing-machine, of

- a needle-bar carrying a barbed or book needle,

mechanism for imparting to said needlebar and needle a reciprocation in the direction of their lengths and an intermittent semi-rotation or of the needle after each descent of the needle and while the needle is in a stateof rest, substantially in the manner and for the purposes described.

shoe, a barbed needle and its bar,

2, In combination with 'a'work'supporting hora adapted to enter the interior of a boot or and mechsaid pipe, I the other ends of said flexible pipes connecting sages s and ani sm for imparting to said needle a reciproeating motionin the direction of its length and a semi-rotation aboutits axis, a whirl or looper mounted in the tip of said horn,withits axis vertical and in line with thecentcr of the uectile, and mechanism, substantially as set forth,

for'imparting thereto a single complete revolution about its axis after'cach descent of the needle, and a period of rest after each revolution, said revolutions being always inthe same direction, as and for the purposes described.

3. In combination with a barbed needle,and

mechanism for imparting thereto areciprocating motion in the direction of its length and a 8,0

semi-rotatidn about its axis, and a whirl mounted in the tip of a born, with its axis vertical and in line with the center of the needle, aninclinedshaft mounted in hearings within the said inclinedshaft about its axis, a bevel-gear wheel mounted upon the upper end'of said inclined shaft, and an intcrmediate'gear-wheel provided with a series of spur-gear teeth to en hollow of the horn, mechanism for revolving 85.

gage with the whirl, and a set of bevel-gear 0 teeth to en gage with the bevel-gear on the shaft,

substantially as and for the purposes described. 4. In combination with a work-supporting horn, a'whirl or looper arranged to be rotated in the tip of said born, with its axis vertical 5 and in line with the center of the needle, the pinion r, and wheel U, and mechanism, substantially as set forth, for connecting the pinion r and the whirl i constructed and arranged to work together, as and for the purposes described. 5. In combination with a work supporting horn adapted to enter the interior of a boot or shoe, and carrying in its tip a whirl or looper, a steampipe. placed within the cavity formed in the horn, and bent, as set forth through which steam passes, entering at one end and being discharged at the other, substantially-as and for the purposes described;

6. In combination with a work supporting IIO horn and a steam-pipe arranged within the cav ity thereof, as set forth, the bearingO, provided with the annular chambers s and t and past leading therefrom, substantially as and for the purposes described. 7. The combination, in a sewing-machine, of the pitman J, provided with'the slot 11 and regulating-screw 0, and the needle-bar provided with the wrist pin m, adjustably connected thereto, substantially as and for the purposes described. Y

8. In a sewing-machine, the combination of the presser-foot P and presser-bar I upon one side of the needle, and the fced-guard-R, arranged upon the opposite side of the needle and adj ustabl y secured to said prcsser-bar, an d adapted to be raised with said presser-bar and pivoted th erein the s I aces hiirizontally, apresser-foot placed'npon th sile orthe needle opposite to the feed-point,

d a feed-guard placed upon the same side of t e needle with the feed-point, and adapted to serve thedouble purpose of a 'presser-foot and teeth, as shown, and the cam f, all constructed,

- lmdhavingmounted in on the. feed-bar L, v

plate K a reciprocating motion, and the arranged, at i operating substantially as described. u 11. The combination of the plate K, mechanism for imparting to said plate a reciprocatinemotion, feed-bar L, mounted in bearings on said plate K, feed-point u, and plate S, provided with the inclined curved slot 1/, all adapted to operate substantially as and for the purposes described. 12. The "combination of the needlebar H, provided with a spline-groove, h, the pinion 2', provided with a feather'or pin to fit said groove, the plate K, having secured thereto the rack i,

suitable bearin gs theremechanism' for imparting to said plates, provided with the c, all adapted to operate scribed.

curved inclined slot substantially as de- .13. The combination, in a sewing-machine,

of an intermittinglymcting feed mechanism, a needle-bar, mechanism for imparting to said needle-bar a reciprocating motion and an oscillating motion about its axis to the extent-of half a revolution at each extreme of its reciptoward the feed-point and mechanism 1y around its axis and the axis of the needle rocation, a needle set in said bar with its barb when the needle-bar is up, anda whirl or looper s ot with the threadeye between the needle and the feed-pointwhen the needle is descending, and mechanism for revolving said whirl entirely around its axis and the axis of the needle after each descent of the needle, and then hold it in a state of rest till the needle is withdrawn from the stock,'

turned a half-revolution, and descends again, substantially as and for the purposes described.

l4. The combination, in'a sewing-machine, of an intermittingly-acting feed mechanism, a needle-bar, mechanism for imparting to needle-bar a reciprocating motion and an oscillating motion about its axis to the extent of halt a revolution rocation, a needle set in said bar with its barb on the side opposite the feed-point when the needle-bar is up, and a whirl or looper set with the thread-eye on the side farthest from the feed-point when the needle-bar is descending,

for revolving said whirl entireat'ter each descent of the needle, and then holdit iua state of rest till the needle is withdrawn from the stock, turned a halfvrevolution, and

descends again, substantially as and for the purposes described.

at each extreme of its recip- Executed at Manchester, New Hampshire,

this 17th day of January, 1879.

SYLVANUS SAWYER.

WILLIAM Es'rY. Y

, Witnesses L. B. CLAUP, H. E. WEBsTER.

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