US369563A - Shoe sole sewing machine - Google Patents

Description

4 (No Model.) 7 Sheets-Sheet 1..

E. H. SMITH;

SHOE SOLE SEWING MACHINE.

No. 869,563. Patented Sept. 6, 1887..

A1 p ATTORNEYS NY PEYEHS. Pholo-Lllhngmphnr, Washinglan. 0. ct

Nb Model.) '7 Sheets-Sheet 2.

E. H. SMITH.

SHOE SOLE SEWING MACHINE.

No. 369,563. 4 Patented Sept. 6, 1887. I

.- By amwxg N PETERS Fh'. J-Lilhngnphnr. Wnhington, n. c

(No ModeL) 7 sheets-sheets.

E. H. SMITH.

$1105 SOLE SEWING MAGHINE.

No. 369,563. Patented Sept. 6, 1887.

5,1 ATTORNEYS.

(No Model.) 7 Sheets-Sheet 4.

E. E. SMITH.

SHOE SOLE SEWING MACHINE.

No. 369,563. Patented Sept. 6,-18 8'7.

WITNESSES: 'm /A/VE/VTOR.'

' hm tt. mm. M/

54mm 5% v 711/ Arm/mists.

N. PETERS. Photo-Lithogra her, Wuhingon. n. a

7 Sheets-Sheet 5.

(No Model.)

E. H. SMITH.

SHOE SOLE SEWING MACHINE.

Pater xted Sept. 6, 1887.

WITNESSES. W24 A t N. PEYTERS. Plww-Lilhognpher, Washington. 0. c.

(No Model.) 7 Sheets-Sheet? E. H. SMITH.

SHOE SOL-E SEWING MACHINE.

Patented Sept. 6, 188?.

mm, mm.

- WITNESSES:

5/ ATTORNEYS N PETERS, PhDlO-Lithogmphur, washin lcn. n. C.

tries.

EARLE H. SMITH, OF BAYONNE, N EWV JERSEY, ASSIGNOR TO THE GOODYEAR & MOKAY SEWING-MACHINE COMPANY, OF BOSTON, MASSACHUSETTS.

SHOE-SOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 369,563, dated September 6, 1887.

(No model.)

To all whom it may concern:

Be it known that I, EARLE-H. SMITH, a citizen of the United States, residing at Bayonne, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in Shoe-Sole-Sewing Machines, of which the following is a specification.

My invention relates to a class of sewingmachines used for sewing outsoles to boots and shoes; and it consists in embodying in such a machine novel mechanism whereby a lockstitch is obtained. Heretofore the circularlycurved needles used in machines of this description have been of the hooked or barbed type, to the exclusion of all others.

In my improved machine I make use of an eye-pointed ncedle,which works in connection with a shuttle to form the lock-stitch. In combination with said elements are placed a circularly-curved awl, a pull-up, a take-up, an adjustable presser-foot, a work-support, and feed and tension devices, all of which are more fully pointed out in the following specification and claims, and illustrated in the accompanying drawings, in which- Figure 1 represents a front elevation of a sole sewing machine constructed according to my invention. Fig. 2 is a plan or top view of the same. Fig. 3 is a vertical section in the plane a: 00, Fig. 2. Fig. 4. is a similar section in the plane y 3 Fig. 2. Fig. 5 is a vertical section in the plane 2 c, Fig. 2. Fig. 6 is a similar section in the plane mm, Fig. 2. Figs. 7, S, and 9 are elevationsillustrating the movements of the shuttle and the needle in forming the stitch. Fig. 10 is an end view'of the shuttle. Fig. 11 is a similar viewtaken from the opposite side. Fig. 12 is a face View thereof. Fig. 13 is a face view of the thread-case. Fig. 14 is a side elevation of the shuttle-driver. Fig. 15 is an end view thereof. Fig. 16 is a perspective of the needle-guide.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates a base, which sustains two posts, A A, having bearings for the main shaft A of the machine,

to which shaft a rotary motion in the direction of arrow 1 is imparted by any suitable means. The base A also carries two standards, B B, at the front ofthe machine, and a standard, B", at the rear, which support the smaller moving parts. The main shaft A carries hubs O D E F G, Fig. 2, having proper projecting and depressed portions and grooves to actuate the various parts of the machine to produce the lockstitch.

The work or shoe is held by the margin of the sole,with the bottom of the sole downward, between a work-s upport, Sflwhich is securely affixed to the standard B, and a presser-foot, P, which can be adjusted according to the variation or difference in the thickness of the material or sole that is being sewed, as will be hereinafter fully described.

The shuttle J is located beneath the worksupport S and in the example shown in the drawings I have made use of a shuttle which is fully illustrated in Letters Patent No. 296,790,

granted to me April 15, 1884, such shuttle consisting of adiscoidal body having a projecting 7o nose or hook, j, which takes the thread t from the needle. In the body of the shuttleis formed a cavity or thread-place, j, which extends completely through the same and receives the re movable thread-case j (shown separately in 7 Fig. 12,) which moves with the shuttle and contains a bobbin or cop. This thread I from the bobbin or cop is led to the center of the shuttle J, and passes out at the rear or left-hand face of thesame. The threadcaseisprovidedwith any usual means of producing a tension on the shut tie-thread. The shuttle is provided with a circular ledge or guide, 3*, and is arranged to oscillate in a race, It, formed in a case or plate, K, that is secured to the standard B, so as to project forward, and said shuttle is actuated to a reciprocating rotary motion bya driver, L, consisting of a circular plate on the end of a short shaft, Z, which plate is provided with a projecting ledgeor follower, Z, that impinges upon the shuttle from its rear; but a space or threadway is left between it and the shuttle for the passage of the loop. The shuttledriver L is actuated from the hub 0, Figs. 3 and 4, as follows:

A pinion, L, is secured to the shaft Z between its hearings in an attached yoke, which pinion is engaged by a toothed segmental arm,L", which is pivoted at Z to the standard B, and is oscillated about its pivot by a link or connectroo ing-bar, L which is pivoted at one end to the segmental arm L The other end of the bar L is slotted or bifurcated to straddle a hub or sleeve on the shaft,over which it slides between suitable guides. This connecting-bar L carries a roller-stud, Ziwhich enters a cam-groove, c, in the face of the hub C. By observing the course of this cam-groove c the motion of the shuttle is apparent-win, the motion of the cam being in the direction of arrow 1, Figs. 4, 7, 8, and 9, the shuttle first moves back in a direction opposite to which its nose points to the position shown in Fig. 7, remains stationary for a short period, then advances in the direction in which its nose points to take the loop, Fig. 8, remains stationary, and, finally, resumingits motion,comes in aproper position to discharge the loop, Fig. 9.

The needle M, Fig. 3, especially, is of a short curvature and is provided with an eyepoint, through which eye the waX-threadt from the spool is passed. This needle M is secured in a needle-carrier, M, which is' mounted so as to be capable of oscillation upon a stud, m, which is secured in the standard B. The needle-carrier is operated by a lever, M", that is pivoted at m to the standard B and is connected with the said carrier by a curved link, M The lever M carries a roller-stud, m", which engages with acam-groove, d, in the face of the hub D, whereby said lever is vibrated and the needle-carrier is moved to cause the needle to enter the material and withdraw at the proper intervals, as will be hereinafter more fully explained.

The awl N, Fig. 5, especially, has the same curvature as the needle M, moving in a plane parallel to the same, and punctures the material from the opposite direction. The awl is secured in a carrier, N, which is independent of the needle M, and oscillates about a stud, n,

which is opposite thestud m of the needle-' carrier and in the same axial line, but is also independent of the said stud m.

The awl-carrier N consists of a toothed segment, which is engaged by a rack, 07/, atthe end of lever N, which lever is pivoted at n to the standard B and carries a-roller-stud, W. This roller-stud enters a cam-groove, e, in the face of the hub E, whereby said awl-lever N is vibrated as the hub rotates. The stud a, about which the awl-carrier N oscillates, is firmly secured in a pendent arm, 0, of a carriage, O, which latter is provided with a slide, 0, fitted in ways formed in a rigid housing, 0, that constitutes part of the standard B. This carriage O.is adapted to move back and forth in the ways in line with the axis of the awl, and carries the awl with it. The awl being in the material at the time the carriage is fed forward, the material is fed stitch by stitch and the awl is caused to act as a feeding device. The throats of the presser-foot P and the work-support S are elongated, so as to allow this motion of the awl.

The linear reciprocating motion of the carriage O, to feed the material through the medium of the awl, is produced by means of a lever, 0 Figs. 1, 2, and 6, which is pivoted to the housing 0' at 0 and is provided at one end with a roller-stud, 0", which engages with a cam-groove, g, in the periphery of the hub G, whereby said lever is vibrated about its point of pivoting. The lever O is slotted at and near its central portion, Fig. 2-, to embrace a stud, 0, the lower end of which is extended into a groove or bifurcated block, 0 Fig. 2, that is rigidly attached to the carriage 0. It will be observed that as the hubG rotates in the direction of arrow 1, Figs. 1 and 6, the lever O is moved through a complete vibration for each revolution of said hub, and consequently the carriage is moved back and forth at each revolution of the machine.

When sewing about the shank of the boot or shoe, it is desirable to make the stitches longer than when sewing about the ball of the foot and toe. To be able to quickly change from the maximum to the minimum length of feed and insure like length of stitches on all the work of certain sizes, the stud 0 in the slotted lever O is placed under the control of a slotted feed-regulator, 0 which is pivoted at 0' to the carriage 0, so that the stud 0 may be caused to traverse the slot in the lever O" by moving said regulator, and be placed at a greater or less distance from the fulcrum 0", according as the feed is to be long or short.

Beneath the regulator O is a plate, O ,Fig. 2, which is provided with holes 0 .in any of which may be placed adjusting-pins 0 0*,(two being used,) a greater or less distance apart, so that the regulator 0 resting against the pin 0 or feed-stop, the feed will be short,and against pin 0.long.

The presser-foot P, Figs. 1, 2, and 5, is secured to a shank or carrying-lever, P, which is secured to a rock-shaft,p,extending through the frame B. The upper arm of this carrying-lever P is provided with a notched or toothed surface, 19, which is engaged by pawls p 19, carried by a detent-lever, P, which is pivoted at p to a support on the standard B and is vibrated by depressed cam-surfaces ee" on the hub E, which act on a roller-stud, 19*, secured to the said lever. A spring, 19*, between the detent-lever and the standard B, constantly keeps the roller-stud of said lever against the hub E. It will be observed that the presser-foot is intermittently locked fast to resist theupward thrust of the awl and the strain of the thread in drawing in the stitch, and that it is unlocked and free to be moved twice for each revolution of the machinefirst, when the work is to be inserted, as in Fig. 5. and, second, when the awl feeds the material forward-so that all pressure is removed from said material. In order to elevate the presserfoot P for the insertion or removal of work, when the machine is not in the proper position for such removal, a hand-lever, P Figs.

1 and 6, is provided, which is secured to the rock-shaft p of the carrying-lever P, such rock-shaft extending through the standard B, as before stated. By drawing this hand-lever outward the presser-foot P is elevated, and on ICO releasing said hand-lever a spring, piattached to the same, causes the presser-foot to clamp the work against the support S. The tensionregulator at the rear of the machine may be of any approved construction, and in the example shown in the drawings I have made use of the following construction: From the rearof the base'A projects upwardly a hanger, h, which supports a spindle, h. Upon a cylindrical portion of this spindle is mounted, so as to rotate freely, a tension-wheel, H, around which the needle-thread t, from a wax-pot, (not shown in the drawings) is encircled. The spring h",Figs.2 and 5, encircling the spindle h, abuts against the tensionwheel, and the pressure of this spring upon the former is varied by hand by turning the adjustingnut If and lock-nut 7 according to the degree of tension required. The spindle h has upon the portion to the righthand side of the tension-wheel H a square shank, about which can slide a hub, H, having an inclined face which is en gaged by a similar hub, H that can rotate on the spindle h. This latter hub, H, has an arm, h provided with a series of holes, h, Fig. 6, by which to adjustably attach the said arm with a connecting'rod, H which is at-' tached to the hand-lever of the presser-foot carrying-lever 1?. As the hub H is turned more or less by the connecting-rod H actuated by a change in the position, higher or lower, of the lower end of the presserfoot P, by reason of variations in the thickness of the material under said presser-foot, the hub H, by reason of the inclined surfaces thereon, is made to move longitudinally, so as to bear with more or less force or pressure against the tensionwheel H, which is operated upon by thespringlf, whereby the rotation of the said wheel is more or less restricted, producing an increase or de crease of the tension independently of the hand adjustment before described. In general, the tension is to be automatically lessened as the stock or material passing under the pressurefoot increases in thickness, and vice versa.

The mechanism for adjusting the tension by hand, when the machine is about to sew, is set to hold the thread as taut as desirable, accord ing to said thickness and nature of the material, so that when the thickness is increased, besides the regular tension, there is added the extra tension due to drawing the thread through more stock, which is very considerable with a waxed thread of a size to well fill the awl-holes. By automatically lessening the tension according to increase of thickness of stock, it is possible to set the stitches more uniformly in the work and materially improve the quality of sewing and the durability of the stitching.

The needle-thread t, after passing around the tension-wheel H, Fig. 4, is guided by two pulleys, I I, located, respectively, at the rear and front ofthe machine, and is lead to apulley, I, that is pivoted to the carriage 0, Fig. 1, especially, from which it passes through an eye, 13, and thence to a take-up lever, B, which carriage 0, Figs. 1, 2, 3, and 4. From this rock-shaft projects upwardly an arm, r,which is pivoted to one arm, r, of abell-crank lever, R pivoted at r to the standard B, (see Fig. 3,) and the free arm of said lever carries a roller-stud, W, in contact'with a depressed camsurface, Figs. 3 and 4, on the periphery of the hub D, so that when the roller-stud enters the depression at the take-up lever B is depressed.

A spring, R connected with the bell-crank lever B and a rigid arm or hanger, R", keeps the roller-stud constantly pressed against the hub D. Stops r and r Figs. 4 and 5, respectively above and below the take-up lever B, limit the motion of the latter. This takeup lever B is intended to control the slack below the point of the needle, which it does by its downward motion from the position shown in Fig. 5; but it islifted to relieve the thread of strain before tightening the stitch.

The thread it is passed from the take-up lever It, over a pulley, 2', carried by a pullup lever, S, and from thence through a needle-guide, U, to the needle.

The pull-up lever S is secured to one end of a rock-shaft, S, having hearings in a hanger,S", secured to the standard B; and to the other end of said shaft is attached an arm, .9, which carries-a roller-stud, 8, Figs. 1, 2, 5, and 6, which enters a groove, f, in the face of the hub F, whereby a vibratory motion is imparted to said pull-up lever, Fig. 5. This lever S descends to supply thread as the needle descends, and also supplies thread as the shuttle opens the loop to pass through it, and then draws the loop from the shuttle to and into the work.

The needle-guide U is loosely mounted on the same stud, m, with the needle-carrier M, and is actuated to keep behind the point of the needle as the same enters the work, and to support it when tightening the thread. It con sists (see Fig. 16) of a hub and shank having an attached portion, a, provided wit-h two eyes or perforations, a a, one for the needle and the other, if, to permit the passageof the needle-thread and guide the same to the eye of the needle, and thus becomes a combined needle and thread guide. A toothed segment, u, extending inwardly from the hub of the needle-guide, is engaged by apinion, to, Figs. 1, 2, 3, and 4, that is secured on one end of spindle a extending through the standard 13, and on the outer end of said spindle is secured a split pinion, a. This pinion a is engaged by a toothed lever, U, that is pivoted at a to the standard B, and carries on its free end a roller-stud, a Fig. 4, which is held in constant engagement with the periphery of the hub G by a spring, U stretched between the said lever and the arm or hanger R. A

depressed cam-surface, c, on said hub vibrates the lever as the hub rotates.

The adjustment and operation of the parts for sewing are as follows: In the drawings the parts are represented in their respective positions when the machine is ready to begin a new cycle-that is, the formation of a stitch. The roller-stud p of the detent-lever lies within a depression, a, of the hub E, so that the presser-foot P can be raised for the insertion of the work between it and the worksupport. After the said hub has rotated through a small angle the detent-lever locks the presser-foot, since the roller-stud thereof is thrown out of the depression 6. The presser-foot remains locked until the material is required to be fed forward, when a second depression, 6 on the hub E is brought to the roller-stud 1% of the detent-lever and unlocks the foot, holding it thus until the work is fed, &c. The shaft A in its rotation in the direction of arrow 1, Fig. 5, causes the earn-groove e in the hub Eto depress the awl-lever N and the awlN is forced upward and into the material, which it pierces. When theawl is well into the material, the cam-grooveg in the hub G vibrates the lever C) and the carriage O is moved in its ways, carrying the awl N (now in the material) toward the needle until the perforation formed by the awl is in line with the needle. The awl withdraws as soon as this feed is accomplished. As the awl withdraws, the needle M, actuated by the cam-groove d in the hub D, moves from the position shown in Fig. 3 toward the material, its guide U keeping close to the point thereof. The take-up lever B, Fig. 4, actuated by the depression d in the hub D, approaching its roller stud r descends with the needle until it reaches the lower stop, W, and takes up the slack below the eye of the needle. The stop 1' is so adjusted that said lever B continues to take up the slack until the needle strikes the work. As the needle pierces the material, the shuttle J, actuated by the cam-groove c in the hub 0, Fig. 4-, oscillates backward from the position shown in Fig. 3 to that in Fig. 7, to allow the needle to pass above its pointj. As the needle descends through the material, the pull-up lever S, Fig. 5, actuated by its cam-groovef in hub F, descends with the needle and supplies thread. The needle advances a little beyond the position shown in Fig. 7 and then slightly retires to the position shown in Fig. 7,whereby the loop is formed. The needle now momentarily rests while the point or nose of the shuttle advances in direction of arrow 2 and enters the loop, remaining in the position shown in Fig. 8 until the needle is withdrawn from the work. When the eye of the needle is above the materialthat is, clear of the same-the shuttle continues its motion in the direction of arrow 2 until it comes to the position shown in Fig. 9,where it remains'stationary. In this position the heel of the shuttle is about opposite the throat of the work-support, and the threadway between the shuttle and its driver L is above the edge of the race-plate or casing K. As the needle rises or retires from the position shown in Fig. 7, the pull-up lever S scended, as previously described,until it strikes the lower stop, W, from which position it rises with the needle to its upper position against the stop 1". WVith the completion of one revolution of the shaft A the shuttle has returned in the direction of arrow 3, Fig. 4, to its original position as shown in Fig. 3, and the machine is ready for the neXt stitch. The shuttle-thread 19 being entwined by the loop of the thread from the spool, alock-stitch is formed.

The arrangement of the shuttlerace and the shuttle-driver L, Figs. 1 and 3, with the ab sence of anything to hide the shuttle, leaves it exposed, so as to be accessible from the rear, as well as the front, whereby the thread-case, though always inserted from the front, may be readily removed by pushing it out from the rear, and to facilitate this an opening or hole may be made in the disk of the driver L.

The shuttle J, Fig. 12, is provided with a flange, J, on its outer or rear face, against which the thread-case j abuts on inserting, and on the other side or front of the shuttle the case is held by a springJ, or any wellknown catch, so that it can be readily removed without disturbing any surrounding part of the mechanism.

What I claim as new,and desire to secure by. Letters Patent, is

1. The combination of an oscillating circularly-curved eyepointed needle, a circularlycurved awl, means for moving the needle and awl in opposite directions to enter the work from opposite sides, and a shuttle for producing a lock-stitch, substantially as described.

2. The combination of an oscillating circularly-curved eye-pointed needle, acircularlycurved awl, means for moving the needle and awl in opposite directions to enter the work from opposite sides, and an oscillating discoidal shuttle for producing a lock-stitch, substantially as described.

3. A circularly-curved eye-pointed needle, in combination with an oscillating discoidal shuttle operating in a plane parallel with the plane of the needle, substantially as shown and described.

4. In a lock-stitch mechanism, the combination of a circularly-curved eye-pointed needle having an oscillatory motion with a discoidal shuttle having an oscillatory motion around its own axis in a plane parallel, or nearly so, to the plane of the needle, substantially as shown and described.

5. In a lock-stitch sewing mechanism, the combination ofa circularly-curved eye-pointed needle having an oscillatory motion with a discoidal shuttle having an oscillatory motion in a plane parallel, or nearly so, to the plane of the needle, and a nose or hook formed on the shuttle for taking up the loop formed by the needle, substantially as shown and described.

6. The circularly-curved eye-pointed needle and awl working in opposite directions, in combination with an oscillating discoidal shuttle working in a plane parallel, or nearly so, with the plane of the needle and awl, substantially as shown and described.

7. The combination, with the work'support and the circularly-curved eye-pointed needle and awl moving in opposite directions, of a discoidal shuttle located beneath the worksupport and oscillating in a plane parallel with the plane of the needle and awl, substantially as shown and described.

8. In a sewing mechanism, the combination, with the work-support and presser-foot and a cireularly-curved eye-pointed needle, of a discoidal oscillating shuttle and an awl, constructed and operating as a feeding device,

substantially as shown and described.

9. The combination of a work-support, a presser-foot, an oscillating circularly-curved eye-pointed needle, an oscillating circularlycurved awl, means for moving the needle and awl in opposite directions, a shuttle for producing a lock-stitch, and means, substantially such as described, for moving the awl laterally when in the work to feed the latter, for the purpose set forth.

10. The combination of an oscillating circularly-curved eye-pointed needle, an oscillating circularly-curved awl, means for moving the needle and awl in opposite directions, an oscillating shuttle working in a plane substantially parallel with the plane of the needle and awl, and means for shifting the awl laterally while in the work to feed the latter, substantially as described.

11. The combination of the work-support, the presser foot, a circularly curved eyepointed needle, a circularly-curved awl, a carriage connected with the awl, and means for reciprocating the carriage to move the awl laterally while in the work to feed the latter, substantially as described.

12. The combination of the pivoted oscillating needle-carrier, the circularlyeurved eyepointcd needle secured thereto, the link pivoted to the carrier, the lever pivoted to the lower end of the link, a cam for vibrating the lever in a vertical plane, and a shuttle working in a plane substantially parallel to the plane of the needle, substantially as described.

13. The combination of the awl-carrier, the needle-carrier, the circularly-curved aWl, and the circularly-curved needle, with a drivingshaft, vibratory levers arranged side by side at one side of said shaft, a cam for vibrating each lever mounted on the shaft, a link pivotally connecting one lever with the needlecarrier, and a rack-and-segment connection between the other lever and awl-carrier, substantially as described.

14. The combination of a circularly-curved eye-pointed needle with the combined needle and thread guide U, having two eyes, one for the needle and the other for the thread, and oscillating concentrically with the needle, substantially as described.

15. The combination of the needle-carrier, the circularly curved eye-pointed needle, mechanism for oscillating said carrier, a needle-guide mounted concentrically with the needlecarrier, and mechanism independent of the needle-operating mechanism for oscillating said guide to keep it near the needleeye when the needle-eye penetrates the work, substantially as described.

16. The combination of a stud, m, a needlecarrier oscillating on said stud and carrying an eye-pointed needle, and the needleguide U, movably mounted and oscillating on the same stud as the needle-carrier, substantially as described.

17. In a lock-stitch sewing mechanism, the combination, with a circularly-curved eyepointed needle having an oscillatory motion, of a discoidal shuttle having an oscillatory motion around its own axis in a plane parallel to the plane of the needle and a pull-up lever for drawing the loop from the shuttle, substantially as shown and described.

18. In a sewing mechanism, the combination, with a discoidal shuttle and a circularlycurved needle, of the pull-up lever S for supplying thread and drawing the thread from the shuttle and a supplementary or take-up lever,1t, substantially as shown and described.

19. The ease or plate K, having a circular race, 70, accessible from both sides, in combination with a shuttle, J, oscillating in the race and having a circular ledge or guide, 1*, adapted to a seat in the race, and an internal flange or stop, and a detachable thread-case, retained in the shuttle on one side by said flange or stop and on the other side by a catch, substantially as and for the purposes described.

20. The combination, with a circularlycurved eyepointed needle and a discoidal shuttle oscillating in a plane parallel to the plane of the needle, of an adjustable presserfoot and a tension device for the needlethread automatically adjusted by changes of the level of the presser-foot, substantially as shown and described.

21. The combination, with the shuttle J, adapted to move in a race, of the follower L, engaging the shuttle, a gear, L, on said follower, a toothed lever, L", engagingsaid gear, and a connecting-rod, L, attached to the lever and engaging a cam for actuating the shuttle, substantially as shown and described.

22. The combination of the presser-foot carrying-lever P, having a toothed surface, 19, the detent-lever P and a cam for actuating the detent-lever to engage and release said toothed surface, whereby the presser-foot is free to be moved or rigidly held, substantially as shown and described.

' 23. The combination of the presser-foot carrying-lever P, a detent-lever, P anda cam for IOC IIO

actuating the same to engage or release .the lever P, substantially as shown and described.

24. The combination-of the presser-foot carrying-lever 1?, a detent-lever, P, engaging the 5 lever P, and an actuating-cam for the lever for unlocking the lever P twice for each revolution of the cam, substantially as shown and described.

25. The combination, with an adjustable IO resser-foot, of the tension-wheel H, inclined hubs H and H, acting on the tension-wheel, and a rod, 11, connecting the hub H with an attached portion of the presser-foot, substantially as shown and described.

I 5 26. The combination, with a curved needle and a discoidal oscillating shuttle, of a pullset forth.

In testimony whereof Ihave hereunto set my hand and seal in the presence of two subscrib ing witnesses.

EARLE H. SMITH. [n s.]

Witnesses:

J. VAN Snn'rvoonn, WILLIAM MILLER.

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