USRE7154E - deake - Google Patents

Description

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- SEWING-MACHINE. No. 7,154. Reissued. June 6,1876.

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SEWING-MACHINE. No. 7,154. Reissued June 6,1876.

- UNITED STATES PATENT OFFICE.

ELLIS DRAKE, OF S'IOUGHTON, MASSACHUSETTS, ASSIGNOR, BY MESNE .ASSIGNMENTS, TO THE DRAKE SEWING MACHINE COMPANY.

IMPROVEMENT IN SEWlNG-MACHiNES.

Specification forming part of Letters Patent No. 155,932, dated October 13, 1874 reissue No; 1', 15 1, date Juuefi, 1876; application filed May 17, 1876.

DIVISION A.

To all whom it may concern:

Be it known that I, ELLIS DRAKE, of Stouehton, in the county of Norfolk and State of Massachusetts, have invented certain new and useful lmprovementsin Sewing-Machines, of which the following. is a specification:

My invention relates to a sewing-machine for forming a new and improved stitch which I have invented, said machine and stitch bein g especially designed for sewin g leather and other heavy work, being particularly adapted to lnn'ness-making, Shoe-making, and thelike.

My invention consists in various new and improved combinations and arrangements of devices for producing said improved stitch.

In the construction of this machine I employ an eye-pointed needle, in connection with a work-supporting arm adapted to enter any portion ot' the interior of a boot or Shoe. A reciprocating locpcr (or the under or stitch thread cooperates with a guide for said thread, so that a loop of the under or stitch thread will be passed through a loop of the needle-thread, and in. which the looper and the guide are independently carried by the work-supporting arnn In the operationof these parts thc under thread forms the stitch loop, while the needlethread serves as the carrier for said 'loop. In this combination the employment of an eyepointed needle enables me to use two threads with a work-supporting arm adapted to enter the interior of aboot or shoe.

In the combination with the eyepointed needle, the looper, thread-guide, work-supporting arm, and presser-i'oot, I employ a swiveling feed device, mounted upon pivoted arms, the object of which is to enable me to sew any portion of the interior of a boot 0r shoe by the employment of two threads, i'rom ,onc offwhich only the stitch-loop is formed.

In the formation of this stitchloop, it is necessary that it should be automatically regulated in length to correspoml with the thickness of the work; and this I accomplish by a new combination otmcchanism, in connection with the feed device, presser-foot, and loopei',

' whereby the thickness oi the work-determines the length of the stitch-loop. In effecting connection allows the presser-footand feed device to be swiveled in accordance with the required direction of the work-such as sewinground the toe and heel of a shoe. Gonnected with this automaticadjustment I combine an independent adjustment to adapt the machine to the various classes of work for which the stitch is applicable.

In some classes of work it is desirable to conceal the ends of the stitch-loops, that the face of the stitches may give the appearance of handsewed work, while in other classes of work, where the face of the stitch is not exposed to View .in wear, and where greater strength is required, the ends of the stitchloops may project beyond the surface of the work, which are subsequently riveted in the operation of rubbing down the seam formed thereby. V

The independent adjustment referred to is to conform the length of the loop to these conditions; and when once this adjustment is made, the lengths of the loops are determined automatically, the same as it they were equal in length to the thickness of the stock.

The feed-points are provided with double slots, and so connected with the presser-foot and the needle-bar that a downward and forward motion will be given them at the same time to feed the work.

Tlie' eoimection of the loo-per and presserfoot with the double cam is made by a yoke, through which the said double cam imparts the proper movement to the ieoper. These movements are peculiar in order to form and give the stitchloop the right length and cast it off.

The looper and thread-guide are arranged to operate on opposite sides of the work-sun porting arm, and both thcsedcvices are somewhat peculiar in construction, toadapt them for joint operation with an eye-pointed needie and the small end of the worksupporting while a single thread has been used in connection with a barbed needle to form what is kno'wn as the chain-stitch)? But the'em- ,ployment of two threads for forming a stitch which passes directly from the exterior tothe interior of a hector-shoe, omits'bottoml, has not hitherto been done in sewingnmachines, to my knowledge, and this is the distinguishing feature ot my' invention, inconnection with the peculiar stitch formed by my machine. V p

In the accompanying drawings, Figure '1 represents a side elevation of my improved sewing-machine, adapted for orming my new stitch; Fig. 2, a front elevation of the same; Fig. 3 a detached view of the double'cam or eccentric, in connection with the yoke "of the looper-rod;v Fig. 4, a detached ViW 0f the marker or creaser and feed-point, for marking between and raising the stitcheswhile feeding the work, when used inthe place of the feed device shown in Fig. 1; Fig. 5, adetail side view of the work-supporting arm, showing the looperprojected; Fig. 6, a horizon tal section of the same, showing the threadguide projected and the looper in position to take the thread therefrom; Fig. 7,v a similar view to Fig.'6, with the looper retracted in position to advance and form the stitch-loop; Fig. 8, a horizontal section of the same, showing the thread-guide retracted; Fig. 9, a sectional view, showing the formation of thestitch in uniting the work; Fig. 10, a crosssection thereof through one of the stitches;

. and Fig. 11, a portion of the bottom of a boot or shoe sole, showing .the appearance of'thc stitch in-the channel. r

A represents the frame of the machine, and which supports the various working parts of 'the same, and B the drivingshaft, provided with a fly-whecl, 0, and from which shaft the proper motion is transmitted to the various parts, as will be hereinafter explained.

D represents a reciprocating needle bar, mounted-in guides in the head of the machine, and operated hya pin or cam,,E, upon the end of the driving-shaft, working in a slotted cross-plate, F, secured to the needle-bar. Up-

on the lower portion of the'needle bar is see cured a collar, G, which may. be adgusted vertically thereon, the'object ofwhich is to operate and regulate the feed devicc,-in connectiou with a shoulder, S, on the needle-bar above the collar.

The said feed device consists of two feedpoints, H, secured near'their front cnds to the presser-foot P, by means of bolts K passing through slots L L in the feed-points, and

connected at their outer ends to the lower end of a curved feed-arm, M, in a similar manner, so that the action of. the two slots will allow the said points to work freely thereon, and rise and fall at proper times during their backward and forward motions.

The feed -arm M is pivoted between the ends of "the supporting armsN N, which are attached'to a plate, W, pi vote d to and projecting from ;the lower needle-bar bearing.

Said feedarm is in form of a bent lever; asshown, and passes through the presser -foot" arm, and to its u er end is pivoted a clutch; or coupling, R, whose upper end embraces the needle-bar above the collar G, and by which the said feed -arm is operated to make the feed on the upward strokeof theneed'le-bar, while the shoulder S, on. said bar, acts upon the clutch 'or coupling it upon the descent of the needle-bar, to retract the fecd-point's,thns giving the proper reciprocating motion to said device, and raising 'thepoints by means of their. slotted connections, during their backward movement overth'e work -th'e separate slots for this purpose being arranged-the front one, L, nearly horizontally, and the obter one, L, nearly vertical, as will be readily understood from the drawing.

The presser foot P is attached to and car.- ried by-a rod N, which moves vertically in guide-plates W, pivoted to andextending out from the upper and lower bearingsof the needlebar, whilea stem, T, rising from the upper end of the presser-foot arm, serves as a bearing for a. spring, U, secured in a vertical tube 0, to give-Jthe prcsser-foot,and feedpointsthe proper downward pressure upon the work, as shown, and the degreeof its pressure'npon the work-is regulated by an ad-;

justing-screw, V,- which bears upon thespring so as to suit the nature of the work.

The vertical rod Nf operates with the-feed, device, and, together with the p'rcsser-foot and the tube confining its pressure spring, is secured. to and carried. by the pivoted plate W W of the needle -bar bearings, so

that the feed {device and presser-foot can. be given ahalf-revolntion around saidneedle-bar, and independent of the'same. T The feed-points H are so attached {and op-. erated upon the presser-foot that, by the down-- ward and forward motion given by theirslots, they descend below the work-bearing surface of the presser-foot, and, at the same time, rise and separate thepresser-foot from the work.

*bythe, compression of'the Presser-foot spring,

whereby the worki-isearriedalong'the face of the snpportingarni by themed-points, to our.

upper thread, and, in combinationwith a worksupporting arm, A which enters within the boot or shoe, and carries the stitch-thread and the swiveling action of the feed device, I am enabled to employ two'threads in uniting the soles and uppers of boots and shoes, by pass ing the stitch from the outside to the inside of the work, and reach any partof the work. This advantage results from the use.of the eye-pointed needle-looper, thread-guide, and work-supporting arm in the formation of my improved stitch-loop.

Z is the lifter by which the presser-foot' and the feed device can be lifted from the work. The throw of the feed-points, which determines the length of the stitch, is adjusted by means of the collar .G' on the needlebar. by raising or lowering said collar.

A represents a double cam, secured on the cam-shaft B, and which works within a yoke, B, secured to a rod, 0, passing downward through the frame, and connected at its lower end to a bell-crank lever, D, which is connectcd withand transmits motion to the looper and, thread guide, as will be presently described.

The said yoke 13 has a friction-roll, E,Fig. 3, which rests upon and is operated by the double cam A, giving a vertical reciprocatin g motion to the yoke, and operating the looper through the crank-connection. To the upper side of this yoke is attachcda short rod, F, which passes upward through a guide-plate and connects with a forked end, G, of a lever, H, pivoted to the top of the machine. Said rod F is surrounded with a spiral spring, which presses upon the yoke and gives its rod 0' its downward movement after it hasbeen raised by the double cam. The lever H. is also connected at its front end to the presserfoot rod N by the swiveling connection K and this point of connection must be in the line of the axis of the needle-bar, as shown, to prod uce the proper movement of the looper, and admit at the same time the swiveling motion to the feed device and presscr-foot.

The bell-crank lever D is connected to and operates the looper 1, giving it a forward and backward reciprocating motion as the-yoke B rises and fails.

it will be perceived that the double cam A gives four motions for each stitch in succession to the yoke and looper-rod, and these movements are transmitted to the looper. The first of these movements takes place just as the needle begins to return through the work,

and causes the looper point or hook to advance through the loop of the upper thread and seize the lower thread from the guide K,

and then recede, bringing a loop of the lower thread through the loop of the upper thread,

i and holding it in this position until the needle is just about, to leave the work, when a similar forward movement of the looper takes place, the looper advancing only until its point comes directly under the hole in the work supporting arm, through which the needle passes, which releases the loop, and allows it to be drawn up into the work, and while the needle is again returning to form another stitch a backward motion is given to the looper to prevent its point from intercepting the loop of the upper thread, while being formed by the receding of the needle.

The looper'I is carried by and lies along the side of the upwardly-inclined work-supporting arm A, and is held in position by a screw, 1,- which passes through a horizontal slot, j, by which, notwithstanding the inclined position of the looper, it has a horizontal movement, its looping end being made horizontal to'corre= spond with the horizontal end of the work-supportingarm, so. that said arm carries a looper for the lower thread for opcration'with the needle-thread. The thread-guide K is also car ried by thei'vork'supporting arm, and .is arranged on, the side thereof, opposite to the looper. It consists of an arm, 1 pivoted to the side of the work-support, amlconnected to a spring, I, the normal position of which is to maintain the thread-guide in its retracted position.

The front end of this arm I is bent at right angles, and has an eye, and passes through an opening, 1-, in the work-support, directly below and in front of the needle-passage, and carries theunder thread, Near the-pivoted end of the thread-guide, and projecting from the spring, is a stud, M, extending through an aperture in the work-support, and oming directly opposite a recess, k, on the under edge of the looper. The said stud is made to operate the thread-guide, and cause its eyed end to approach and meet the looper as it moves forward, so that it can receive the thread and recedc again after the loop is taken. The first movementis caused by the looper passing over said stud, and the second by means of a suitable spring,-to throw the thread-carrier back.

In this movement of the thread-guide the looper acts as a cam upon the'stud M, so that both the looper and the thread guide are upon opposite. sides of the sl'ipporting-arm A, and they are both operated from the bellerank connection with the double cam, and directly within the boot or shoe while sewing with two threads. The stitch-loops areformed of lengths corresponding to the thickness of the work operaitedupon, by means of devices operating automatically in combination with the presser-foot, and the devices for operating the looper, and this result is governed by the the work-support.

height of the presser-foot from the surface of These devices consist of the lever H, connected-at one end with the presser-vfoot rod N in the line of the axis-of the needle-bar, and at the other end with the looper I, through the yoke and rod B 0' and the bell-crank, nth us completing the circuit of these devices and operating them by the double cam, the adjustment of the lever H by the screw 1 serving to bring the friction-' roll E, Fig. 3, nearer to or farther from the acting points of the double cam, and thus give the desired movement to the looper, the thickness of the work serving as the gage for the length of the loop, by means of the ,presscrfoot resting thereon, and when-once the proper mljustmentis'made, the operation to'conform to the varying thicknesses of the work-such as .the ball and shank of the shoe-is automatic. 4 The adjustment of the lever H todepress'its --cam-connected end will make the loops longer,

' above the stock to the. ilooper below the stock,

and in connection with a loop formed by aneedle-thread from above and an under thread from below the work; The vertical guide-rod N of the presserfoot carries on its upper end' a cranked coupling, 0', the upper crank portion which extends over the end of the lever H,

which connects with the double-cam yoke. Through this crank-coupling extends downwardvan adjusting-screw, 1 carrying on its lower end a flanged collar,-K which is embraced by thefi'ontforked end of the lever H, whereby I obtain a swiveling connection of the feed-carrying device with the lever, which automatically controls the lengths of the loops by its connection with the operating looper-cam. The looper-rod O is made adj u'st-able by means of a screw sleeve, l, and lock-nut union m, with the -yoke-rod, so that by adjusting the screw-sleeve the looper-hook is made to have its proper relation with the thread-guide and the needlew The adjustment of the lever B serves another important advantage. In difi'ersnt classesof work it is desirable to conceal the ends of the stitch-loops within the'wo-rk, while in other classes of work it is advantageousto have the loop ends project beyond the surface. In the former'class the concealing of the ends of the loops gives the appearance of hand-sewedwork; while in the other class greater strength of stitchlbeing' required, I am enabled, by the pro ection of the ends of the loops beyond the surface, to

rivet them in" the operation; of finishing or rubbing down the work. This I efl'eet by ad justing the lever-screw I as required, to, make the looper have a greater backward movement than the thickness of the stock would give, and thereby give greater length to the stltch-loops, and the desired projection of the ends thereof beyond the surface of thework. The reverse adjustment of these parts gives loops of less length than the thickness of the stock, so as to conceal the ends of the stitchloops. By this independent adjustment 1 con trol theoperation of the machine to suit different classes of work.-

The cam A (show'n in Fig. -3) has two separate and distinctacting points, a 0, Fig. 3, b

of unequal radius. That portion of the earn it farthest from its center is to project the looper-point, to engage with the under thread.

to'form the stitch-loop, while the second or lesser projection o ofthe cam ,serves to give the looper a quick forward movement for ,casting offer releasing the loop from its barb;

but this action of the cam must not project the looper so that it will'engage with the under thread during the upward motion of the needle, but simply casting 0d the loop to allow the "needle-to complete the stitch. The portion of the cam between its acting points is concentric with the 'driving-shaft,-andgives no movement to the looper, while the depression between the acting points allows the looper to be forced back by the action of the 7 spring upon the yoke B andcarry with it the stitch-loop to its proper length. I

In passing from the lesser cam-projection to the concentric portion, the looper,h aving cast 011' its loop,.recedes enough to allow the nee-, .dle'to again form a loop to receive the looper.

Y P represents a device for taking up the needle-thread, and consists of alever, it, carry- .ing a grooved roll, 8', at its end, and held in position by an adjusting-spring,- T',fw'hich may be set so as to press with moreor less force upon the thread, by means of asetscrew, U,-

notched end will engage the vperiphery. of the spool, and give the desired pressure or tension thereon. The thread for the stitch-100p passes through the guide K from the spool Z;

Reference being had to the drawings, Figs. 9, 10, and 11 show the stitches being-formed by the lower ,thread a, the upper or needle thread b serving as thecarrier for this lower or stitch thread. This is done by first passing the upper thread I) through the work by means of the e eipointed needle 0, and then drawing a loop", of the under thread a through the loop a of the upper thread, formed by the recessi'on of the needle. The under-thread loop .isithen released by the forward movement of the loop er, and is drawn up into the work by 'ing and operating devices,

the return of the needle filling the hote made phereby, and forming two loops or a double oop.

It will be perceived that the stitch thus formed will present butone thread on each surface of thework, giving the appearance of hand'scwed work, while the strands of the stitch in the needle-hole will consist of four threads or strands, and completely and absolutely fill the hole formed by thcnee'dle, and will be so packed or crowded therein as to securely and firmly bind the work together. The stitch, however, being embraced in a division of this patent, need not be more specifically described herein.

I claim 1. The combination, with an eyed ncedle,.

carrying an upper thread, and the work-sup porting arm A of a looper, I, and guide K,for the under thread, arranged upon said arm, said looperoperating to convey from the thread-guide the loop of an under or stitch thread through a loop of the upper or needle thread.

2. The combination, with an eye-pointed needle, work-supporting arm, its looper and thread-guide, of the swivelingfced and presscr foot devicesfor joint operation, as set forth.

3. The th readguide K having the ri ghtangled eyed end, and a cam-pin, M, and springeonnection at its opposite end, in combination with the looper, having a cam-recess, k, and a slot-guidc,j, said eyed'end and cam-pin being arranged to extend laterally through the worksupporting arm, for operation as herein set forth.

4. The arms W, pivoted to the fra'me,-in combination with the presscr-foot I, its red N, the feed device HM It, the collar G, and shoulder S-oi' the needle-bar, substantially as and for the purpose herein set forth.

5. The combination, with the presser-foot I, coupled for automatic operation with the looper I, as descri.bed,-of the needle-bar 1),

said coupling being arranged in line coincident with the axis of the needle-bar, for the purpose described. g

6. The combination of thelooper, the-threadguide, andthe presscr-i'oot, of connecting mechanism, substantially as described, whereby the length of the stitch is automatically determined to suit the thickness of the work, substantially as specified.

7. In combination with the looper connectand the needlebar, the couplings 0 It, and the feed and presser foot devices, for'the purpose specified. 8. The combination, with the eye-pointed -.nccdle, operating through the top of the worksupporting arm,of the thread-guide through the side of said arm, and the looper, along the arm side, to operate, in the manner described, upon 'flat surface-work.

9. The combination, with the screw-rod G,

the cam-yoke B and the looper I, of the screw-sleeve Z and the locienut m, whereby the looper-connection is adjusted. i

10. The combination of the double cam A on the driving-shaft B, with the yoke B and its rod 0, connected with and operating the looper, substantially as described.

11. The feed points II' II, secured to the prcsseut'oot by pin K, and provided with double slots, as described, and attached to the feed-arm M, in combination with collar G and shoulder S, by which said feed-points are operated, to have a downward and forward motion at the same time, to move the material upon the work-supporting arm.

12. The combination, with the doubleslot' ted feed point or points, the feed-arm 1W1, pivoted to the frame, as described, and the neodle-bar, of the presser-foot 1P, its guide-pin T, and the presser-spring U, whereby the spring force of the presser-foot is transferred to the feed point or points during the operation of feeding the work, and the use of a separate device for that purpose avoided.

13. The rod N, which carries the presserfoot, in combination with the lever H and rod F, by means of which the throw of said rod is regulated, for the purpose of controlling the movement of the yoke B, and regulating the length of the loop of the under thread, as herein set forth. 14-. The combination of the rod N, cranked coupling 0, set-screw I, and lever II, connected with the rod 1?, by, means of which the throw of said rod F may be adjusted, to give a greater or less length to the loops than the thickness of the stock being sewed, as herein set forth. l v

15. The yoke B. and adjustable rod 0, in

combination with the crank-arm 1), and looper as herein set forth. taking up the thread,

1, operating together,

16. The device for consisting of the lever It, roll S, and adjust able spring T, attached to the hanger V, the roll acting directly on the thread as the needle rises, all substantially as herein described.

17. The marker or creaser 2 13 for attachment to the feed-arm M and presser-fo'ot I, as described, andadapted to be operated by the collar G, and shoulder S on the neodle-bar, as herein set forth, and for the object'specified.

IS. The combination, with the resser-foot and the feed operating mechanism, of a creaser, substantially as described, whereby the work is fed'and the spaces between the stitches creased or marked.

19. The combination, with the work-supportin'g arm, adapted to enter a boot or shoe, and a reciprocating needle, of a mechanism for doubling and quadrupling an under thread, and for drawing sa'rd thread quadrupled into the needle-hole by the needlethread, substantially as described.

In testimony whereof I have affixcd my signature in the presence of two witnesses! ELLIS DRAKE.

Witnesses:

A. E. H. JOHNSON, J. W. HAMILTON JOHNSON.

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