US241553A - leslie - Google Patents

Description

4Sheets-Sheet 1. A, M. LESLIE. Rotary Shuttle Sewin No. 241,553.

g Machine. Patented May 17, I881.

N. PETERS. Phmo'ullwgnpher. Walhlnglun. D- C- 4 Sheets- Sheet 2.

A. M. LESLIE. Rotary Shuttle Sewing Machine. No. 241,553. Patented May 17, I881.

jFuzelcZ WM- ofiabg,

N. PETERS. PhoQo-Ulhugrzphcr, Walhinglnn, D. C.

A. M. LESLIE. 4Sheets-Sheet 3. Rotary Shuttle Sewin No. 241,553.

g Machine. PatentedMay 17,188l.

"mum Imulmmmiim MR N. PETERS. Pbolo-lilhcgnpher, Walhingiou, D. C.

INITED STATES PATENT OFFICE. 4,

ROTARY-SHUTTLE SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No..241,553, dated May 17, 1881. Application filed Janua'ry'iZE, 1880. i

To all whom it may concern Be it known that I, ARTHURM. LEsLtE, of

, Ghicago,1llinois, have invented a new and useful Rotary-Shuttle Sewing-Machine;of which the following is a specification.

body the rotalyshnttle principle in a sewingmachine possessing the standard qualities of noiselessness, light running, and perfection of stitch in a superior degree, with convenience of manipulation, uniformity of action, andsimplicity of construction. s:

Said invention consists more particularly,

first, in means for, releasing and throwing out.

the bobbin of a rotary shuttle without disturbing the shuttle or its race; secondly, in means for releasing the bobbin ot' a rotary shuttle by the pressure of the finger; thirdly,

inmeansfor thus releasing said bobbin and at. the same time ejecting it, without subjecting the'bobbin to constant pressure; and, fourth] y, in improved means to prevent twisting the thread of a rotary shuttle and for giving the same the requisite tension and regulating the latter independently of the bobbin and bobbinretaining devices.

. power and for releasing the needle-loops by I combination ot'a central bobbin, thepart's her. in gso timed that the bobbin iscarried through Said invention consists, fifthly,in meansto facilitate the release of the needle-loopsjliy a rotary shuttle driven at high speeds"; and;

"beneath the cloth-plate and mechanism connecting said shafts,the under shaft turning alternately fast and slow for driving the shuttle at high speeds with superior economy of periodically opening a space between the heel of the shuttle and itsdriver.

It consists, eighthly, in the addition to said the needle'loopsat the greatest speed of said under shaft, the needle-loopsbein g thus formed a and released quickly enough without multiply- I ing the motion of the under Sllflfii,ll0lZWltllmanded by a central bobbin.

Said invention consists, ninthly, in the addition tothe combination last named ofanindependent positive motion take-up and means for actuating the same, these parts serving to let down ample thread for the needle-loops duriu g the fast motion of the under shaft and to take up theslack after the loops are released by the shuttle.

It consists, tenthly, in a peculiar combination and arrangement of parts, whereby the take-up lever, is adapted to draw the upper andsaid thread is relieved from unnecessary friction and strain between the upper tension device and the needle.

It consists, eleventhly, in means to facilitate assemblingsaid rotary shaft mechanism.

Said invention consists, twelfthly, in a peculiar combination and arrangement of parts, whereby certain feed mechanism is located in compact form immediately at and behind the feed-dog on the bottom of the cloth-plate and regulated from the customary point in front of the standard; and, lastly, in simple and effective means for adjustin g the feed-dog vertically, to regulate the projection of its teeth, as hereinafter more fully set forth.

Figure 1 of the accompanying drawings is gan end elevation of my said rotary-shuttle sewing-machine, and Fig. 2 is a horizontal section through the rotary shuttle and its race and driver on theline 2 2, Fig. 1. Fig. 3is an elevation of the machine-head from the backthereof, showing more particularly the take-up, with the guides and tension for the upper thread, thehead being shown as ifbroken from the arm, with the upper shaft in cross-section. Fig. 1 is an end view of the under shaft, showing the shuttle-driver disk. Fig. l is a likeview, showing the shuttle-driver with the latter partly in section; and Fig. 2is an edge view of the shuttle-driver and its disk. Fig. 1 is a perspective view of the bobbin-case and bobbin separated, and Fig. 2 is an axial section. of the bobbin-case with the bobbin in it. Fig. l is a face view of .the shuttle with the bobbincase and bobbin removed. Fig. 2 is a section of the same on the line correspondingly numstanding the relatively-large size of loop dethread from the needle in a nearly-direct line,

bered, and Fig. 3 is a back view thereof. Fig. 2 is a top view of the presser-foot detached. Fig. 4 is a vertical longitudinal section of the machine, and Fig. 5 is a vertical section through the standard of the same on the line 5 5, Fig. 4, showing more particularly the combination of rotary shafts. bottom view of the machine, partially in section; and Fig. 7 is a partial vertical section on the line 7 7, Fig. 6, showing more particularly the feed mechanism. The figures numbered 1 to 3, inclusive, and Figs. 1, 1 2, 2 Sheets 1 and 2, are drawn to one scale; Figs. 1 2, 1 2, and 3 to a larger scale, and the other figures, Sheets 3 and 4, to another and smaller scale.

Like letters of reference indicate corresponding parts in the several figures.

A hollow rigid arm, A, unites the cloth-plate O and head H of this machine, and these three parts support the operative mechanism.

A reciprocating needle-bar, B, works vertically in guides formed within the head H, and carries at its lower end a short straight needle, N, to which an upper thread, 1, is fed from a commercial spool, .9.

Immediately in front of the plane of the needle a segmental rotary shuttle, S, works in a vertical transverse plane within a shuttlerace, R, which is formed by a braced and recessed projection cast on the bottom of the- :and latch l are placed within said slot and recesses. Said lever l works on a pivot parallel to the face of the shuttle, as shown in Figs. 1

and 2, and operates the latch Z by means of a shoulder, k, Fig. 3, which engages the ex; tremity of one leg of said latch, the latter being of L form, with one leg dovetailed and adapted to slide in said radial recess and to engage with said shoulder of the lever, and

the other adapted to work within said recess of the hub and to engage with the face of the bobbin-case W, at the outer extremity of said hub, as illustrated by Figs. 1, l and 2. The

latch, through said lever as apart thereof, is'

behind the outer leg of the latch '1 within the hub h, by a little screw introduced longitudinally of the latter, as shown in Fig. 2 When released the bobbin and bobbin case are thrown out or protruded by an ejector, 0, so as to be readily taken from the shuttle through Fig. 6 is a' said opening of the race-cap. This ejector is combined with the lever l in the form of a spring-finger projecting from the heel of said leverinto said radial recess behind the bobbinchamber 0 being accommodated by cutting away one side of said slidin leg of the latch Z as shown in Figs. l and The bobbin-case 12?, Fig. 1, has a central sleeve, 8", fitted to the shuttle-hub h, and the bobbin 1) rotates upon said sleeve free from contact with any part of the shuttle. When the bobbin and bobbin -case are in place, as shown in Figs. 1 and 2, the latter is rendered non-rotary by the under thread, 2, which is always taut between the upper edge of said bobbin-case and the cloth, owing to the location of a tension-spring, 15 on the face of said case at said edge, from which the under thread,

2, is drawn by the feed as required. The under thread is carried from the bobbin 1) first radially, through a notch, 7L2, Fig. 1, in tne case I); thence horizontally out of the bobbin-chamber, within a groove, g, in the periphery of said case; thence through a notch, h, in said tension-spring t and preferably once around said spring, and thence to the cloth. The pressure of the spring t is regulated by a little screw, r, working in a tapped support, 8 which is at tached outside of the spring. The under tension may, consequently, be readily regulated without unthreading it, while the threading operation, when a full bobbin is inserted, is rendered very simple. The tension is, moreover, wholly upon the thread, andconsrquently the same, whether the bobbin be full or-empty.

To reduce the unequal efi'ect of centrifugal force upon the segmental shuttle S, its thicker side is cut away or slotted, as shown at z, and this, I have discovered, can be carried to the extent indicated without destroying the de sirable tendency of the shuttle to separate from its driver D by centrifugal force, so that the needle-loops may pass between. Heretofore the tendency of the rotary shuttle to fly outwardhas been so great at high speeds as to seriously increase the friction of theshuttle within the race, and thus to occasion excessive pressure of the driver 1) against the heel y of the shuttle. To further utilize the remaining outward tendency of the shuttle S, its circumferent-ial flange f is rounded; or it may be beveled on itsouter face, its back being flat, and the guide groove 9 formed by'the cap 0, is made to correspond, so that said outward tendency shall press the point x of the shuttle upward and toward the needle. I thus insure catching the needle-loops after the parts are worn and when running at the highest speed. The shuttle is located as highas is practicable for economy of motion, and the shuttle-race and its cap are made open at top to admit the needle and to provide for the passage of the threads, and all the parts of this mechanism are made snug and. smooth, so as not to catch or. out either thread.

. The shuttle S is rotated by means of a driver, D,the effective portion of whichis a segment- IIO ' a1 projection behind the heel y of the shuttle within its race, as shown in Fig. 1, this driver being carried by a circular disk, D which pin, p, which is fitted to an axial socket, to, in the shaft. (See Figs. 131 2 A screw, s

passes through the body of the driver into one of a series of tapped holes, h, in the driverand 4 disk D the series rendering the driver adju stable at will relatively to the feed cam c,

which is, by preference,cast with said disk, as shown. The driveris slotted or bifurcated, as shown in Figs 1 2, to permit the needle to descend in advance of the passage of the driver and to protect theneedleloop, .90 being the heel of the driver, which is followed by the point a: of the shuttle.

The needle-bar B is driven by a crank-disk, D, on a rotary shaft, S, said disk having a friction-roller wrist, which works in a grooved cross-head, H, with which said bar is provided within the head H, as shown in Figs. 3 Said shaft S extends horizontally through the horizontal portion of the arm A,

i being supported by bearings at the respective extremities thereof. One end carries the ricedle-driver, as aforesaid. The other end pro 1 trudes and is furnished with a double pulley,

P, of two diameters, and a hand-wheel, W, to

'the hub of which said pulley is united, when turned forward, by means of a friction-clutch, 0 The wheel is fastened on the shaft by means of a screw, 5 The pulley is driven by a band from a driving-pulley, and by its other groove transmits independent motion by a band to abobbiu-winder or other attachment, when driven backward, without driving the shaft S. When said pulley is driven forward,

as aforesaid, an even motion is imparted to the shaft S, and therethrough to the needle-bar in the most direct manner, and consequently with the least loss of power. Said shaft S has a crank, 0, within the arm A, in line with the center of the upright portion or standard of said arm, and the wrist of said crank is embraced by the journal-head of a lever-pitman, L, the slot of which embraces a rocking ful cruiir,' F/, which is supported within the standard byan axial screw, as shown in Figs. 4 and 5. Thelower end of the pitman L is connected by a pivot-screw to a short link, L which, in turn, is connected bya pivot-screw to a crankdisk, D on the adjacent end of the shaft S the other end of which carries the shuttledriver, as aforesaid. This shaft S is supported parallel to the shaft S by hanger-bearings b b ,cast on the bottom of the cloth-plate O, and rotates freely therein, but in a direction the reverse of that of said shaft S, as illustrated by arrows in Figs. 1 and 5, and with an uneven motion, which is the object of said leverconnection.

By inspecting Figs. l and 5 it will be seen that in the position of the parts shown in these Figs. 3 and 4.)

and all the other views of the machine, when the shuttle S is ready to release the needleloop, as shown in Fig. 1, the lower shaft is ap' proaching its point of slowest motion, which is reached when the crank O is on its upper center, the power end of the lever being then longest and the motion of the other end cor responding] y reduced. An important advantage is thus gained in the operation of the shuttle, which, being loose, does not immediately partake of the change of speed, butv by its momentum speeds ahead of the shaft-controlled driver, and thus permits the needleloop to escape freely between. Another .advantage of the fast-and-slow motion is the accommodation ofa central bobbin ofample size, the shuttle containing such bobbin being carried through the needle-loop at the faster speed of the shaft, and consequently within a relatively short time.

A rotary upper shaft, to receive the even motion of the motor, is essential to said employment of a fast-and-slow under shaft, as will be observed, and by the employment of such upper shaft 1 am also enabled to employ .a positive and independent take-up lever, T, which lets down ample slack for the shuttle, and is adapted to give down and take up thread while the needle is stopping and starting, or, in fact, may receive any required movement. (See Said take-up lever T projects through a slot in one edge of the head H, being pivoted parallel to the shaft S and behind it, and is operated by acam-groove, c of therequired shape, which is formed at the back of the disk D, and is traversed by a stud-pin on the lever. Ihave shaped and timed the said cams so as to let down thread'as soon as the needle enters the goods, and until the greatest diameter of the shuttle is through the needleloop, and to take up rapidly in conjunction with .the feed during the slow motion ofthe under shaft and the descent of the needle to the cloth.

'lhe spool s is mounted on a spindle, on the top of the arm, and the upper thread, 1, is

guide, 9, on the back of the head H, behind the arm A; thence to a rotary disk-tension device, t, beneath the arm on the back of the.

head H thence to the eye of the take -up lever T, and thence through a guide, g at the bottom of the head, and a threading-hole, h, at the bottom of the needle-bar B, directly into the groove and eye of the needle. The take-up is thus adapted to pull directly upward on the thread without drawing it over so many friction-points, as in former machines, while the arrangement of parts is neat and convenient.

To facilitate assembling the parts of thelrotary-shaft mechanism within the arm A, as aforesaid, the hearing at the right-hand end of the shaft A is made a part of a plate, I), which is attached bymeans of screws after said parts are in place. Said bearing-plate and the faceplate of the head B being off, thenaked crank- II S shaftisintroduced end wise and pushed through to receive the crank-disk D, which is held in place thereon by the ordinary radial set-screw and an axial wedge-screw, as shown in Fig. 4, with its wrist ninety degrees behind that of the crank 0. (See Figs. 3 and 5.) The shaft is then drawn back into position. The leverpitman L, introduced endwise through the standard, is attached by means of a screwdriver inserted through an orifice, 0, Fig. 5, in the back of the arm, the shaft being turned to bring the screws successively opposite said orifice. The bearing-plate b is then secured in place and is followed by the pulley P and wheel W.

An improved four-motion feed mechanism is formed, as shown in Figs. 6 and 7, by means of a simple lifting-and-lowering cam, 0, combined with the shuttle-driver disk D as aforesaid, a single-acting stroke cam, 0 fastened on the shaft 8*, immediately behind its adjacent bearing, W, a' pair of yokes, y 1 embracing said cams, alever-link,l, connecting said yokes, a horizontal guide-pin, 19, supporting the slotted outer end of said yoke 3 a spring, 8, arranged within a recess in said yoke y and pressing against said pin 19 to supplement the action of said cam 0 and a fulcrum,f, projecting in front of the lever-link I.

To accommodate and support the feed m echanism, the cloth-plate O is provided with a pair of depending lugs. l 1 at its rear edge, and a longitudinal slot, 8 in front of the arm'standard. The former are drilled to receive the pin 1) and a parallel slide, s from which the fulcrum f projects in the form of a hook. Said slide 8 projects from the end of a flat rod, r,

which extends diagonally across to the slot 8 where it terminatesin a nut end, and a thumbscrew, 8 passing through said slot, clamps said nut end against a planed boss, through which said slot is formed. The milled head of said screw 8 corresponds in position and movement with other stitch-regulators; but with the present mechanism it operates to fasten the fulcrum f at different points, and thereby to vary the throw of the feed-dog cl, which is carried by the yoke y, without changing the duration of the respective feed-motions, the full stroke of the cam 0 being used at all times. The advantage of this peculiarity is uniformity of relation between the feed and take-up under all circumstances and a consequent superior uniformity in the perfection of long and short stitches. The feed mechanism is, moreover, of superior simplicity,compactness, and positiveness. The feed-dog d projects over the shuttle S and works through a suitable opening in a thin plate, which completes the cloth-plate surface at this point, the dog extending on botlisides of the needle-hole, as shown in Fig. 4, so as to equalize the strain on the cloth. To regulate the prominence ofthe feed-dog, its serrated upper part or the dog proper is held between vertical lugs on the top of the yoke y by a vertical screw, s and ahorizontal slotted wedge,-

throwing out the bobbin without exposes said bobbin-chamber and ,stantially as herein described.

the shoe to be adjusted with reference to the needle more readily than other forms. The foot may be otherwise of any preferred make, but is preferably stamped out of soft plate steel and hardened in the form shown. The lifter L is of a common form, attached by a pivot-screw to the face of the head H; and P represents an axial screw adj ustinga coiled presser-spring within the head in a common way.

The abo e description will enable those skilled in the art to make and use my said machine and its several parts.

Details which are not particularly described are clearly shown in the drawings or may be of a well-known description.

I do not herein claim the combination, in a sewing-machine, of a rotary shuttle having an open bobbin-chain berin its outer face and a circumferential guide'flange or projection, a cir cula-r shuttle-race grooved to receive said flange,

a cap-plate attached by screws and having a concentric openingto expose said bobbin-chamber, a bobbin removable at will through said opening, and a combined feed-cam and shuttle-driver located parallel to said shuttle-race, and having a projection extending into the latter behind the heel of said shuttle; nor the combination, in a sewing-machine, ot' a rotary shuttle having an open bobbin-chamber in its outer face and a circumferential guide flange or projection, a circular shuttle-race grooved to receive said flange, a cap-plate attached'by screws and having a concentric opening to expose said bobbin-chamber, a bobbin removable at will through said opening, and a combined feed-cam and shuttle-driver located parallel to said shuttle-race, and having a projection ex tending in to the latter behind the heel of said shuttle, said projection being constructed with a deep peripheral notch or groove forming a detached horn at the rear end of saidprojection, these features being claimed by me in an application for patent filed December 31, 1877.

What I now claim as new, and desire to protect by Letters Patent of the United States, 1s-

1. A rotary shuttle having an open bobbinchamber in its outer face and provided, with an attached latch and ejector for releasing and disturbing the shuttle, in combination with a shuttle-race having an annular cap, the opening of which latch, sub- 2. A rotary shuttle having an open bobbin- ,chamber in its. outer face and a recessed hub Within said chamber, and provided with a finger-lever projecting through an opening in said face and a slidin g latch projecting through said hub, as herein specified.

3. A rotary shuttle having an open bobbinchamber in its outer face and provided with a finger-lever projecting through an opening in said face and terminating in an ejector-finger at the back of said chamber, as herein specified.

4. A rotary shuttle having an open bobbinchamber in its outer'face, a central hub within said chamber and a central latch, and provided with an annular bobbin-case, an annular bobbin within said bobbin-case, and an adj ustable tension device on the exposed annular face of said bobbin-case, as herein specified.

5. A segmental rotary shuttle constructed with an axial'bobbin-chamber and a peripheral guide-flange, and having its wider intermediate portion made light, substantially as herein described,in combination with a concentric shuttle-race and its cap and a rotary shaft carrying a shuttle-driver which projects hehind the heel of said shuttle,as specified.

6. The combination of the rotary shuttledriver D with its fastening-screw s, and the shuttle-driver disk D, having a concentric series of screw-holes, h, for adjusting said driver, substantially as herein specified.

7. The combination, in a sewing-machine, substantially as herein described, of a circular shuttle-race, a segmental disk-shuttle rotating freely within said race, an under shaft carrying a rotary-shuttle driver which nearly fills the space within said race behind the heel of the shuttle, an upper shaft provided with the driving-pulley, and mechanism for transmitting'an alternately fast and slow motion to said under shaft from said upper shaft, the moving parts being arranged and timed, as specified, for periodically opening a limited space behind the heel of the shuttle to release the needle-loops, in themanner set forth.

8. The combination, in a sewing-machine, substantially as herein described, of a circular shuttlarace, a segmental disk-shuttle having a central bobbinand rotating freely within said race, an under shaft carrying a rotaryshuttle driver which nearly fills the space within said race behind the heel of the shuttle, an upper shaft provided with the driving-pulley and with a'needle-driver, mechanism for transmitting an alternately fast and slow motion to said under shaft from said upper shaft, and a reciprocating needle-bar carrying the needle, the moving partsbeing arranged and timed, as specified, for the purposes set forth.

'9. The combination, in a sewing-machine, substantially as herein described, of a circular shuttle-race, a segmental disk-shuttle having a central bobbin and rotating freely within said race, an under shaft carrying a rotaryshuttle driver, which nearly fills the space within said race behind the heel of the shuttle, an upper shaft provided with the driving-pulhay and with a needle-driver and take-up-cam mechanism for transmitting an alternately fast and slow motion to said under shaft from said upper shaft, a reciprocating needle-bar carrying the needle, and a take-up lever actuated by said cam, the several parts being arran ged and.

timed, as specified, for the purposes set forth.

10. The combination, with the head H and.

the take-up lever'T, projecting at one edge of said head, of mechanism within said head for operating said lever and the thread-guides g and tension device t, attached to the back of said head, and threaded, as herein specified, said tension device being arranged immediately above the lower thread-guide, and. said take-up lever taking its bight of thread from between said tension device and lower threadguide, as shown, for the purposes set forth.

11. The combination, with the hollow arm A and a crank-shaft within the horizontal portion of said arm, of the bearing-plate b, forming a part of the standard and constituting one of the bearings of said shaft, and screws attaching said bearing-plate, as herein specified, for the purpose set forth.

12. In combination, the cloth-plate O, havin g a longitudinal slot, 8 in front of the standard, and parallel depending lugs l i behind the feed-slot, the thumb-screw 8 diagonal rod r, slide s fulcrum f, lever-link l, yokes 3 3 and cam 0 as herein specified, for the purpose set forth.

13. In combination, the adjustable feed-dog d, the slotted horizontal wedge w, the vertical screw 8", and the yoke 3 adapted to receive and carry said feed-dog and adjusting devices, substantially as herein specified.

ARTHUR M. LESLIE.

Witnesses:

' W. B. LE STAGE, B. A. Nnwsus.

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