US1950564A - Sewing machine - Google Patents

Description

J. R. OLIVER SEWING MACHINE Mart 13, 1934 Filed June 4, 1931 8 Sheets-Sheet 1 ATTyS.

J. R. OLIVER SEWING MACHINE March 13, 1934.

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Patented Mar. 13, 1934 UNITED STATES SEWING MAGWE Jolm Roger Oliver, Medfield, Mesa, assignor to Reece Shoe Machinery Company, Boston, Mass., a corporation of Maine Applicationtlune 4, 1931, 'Serial No. 542,048

13 Claim.

This invention is a novel sewing machine, and relates more particularly to power driven types of machine for stitching leather or shoes, a typical instance of such machine being the so-called outsole stitcher by which the outsole and welt of a shoe are attached together by lock stitches formed by two threads, of which the upper thread is usually supplied from a shuttle.

One of the general objects of the present invention is to afford a sewing machine of the power driven type referred to which will be highly efiicient and convenient in action, and which will possess easy running qualities, permitting it to be operated at higher speeds than heretofore customary. It is a particular object and feature hereof to afford easy and smooth running qualities by dispensing with the usual operating cams employed for driving some or all of the stitching instruments, and instead putting zgsuch instruments through their movements by means of what may be termed link motion connections, comprising usually cranks on the operating or stitching shaft and link and lever connections actuating the respective instruments with a smooth or even harmonic motion free from abrupt changes of speed or direction.

Save in the instances hereinbelow specified, including the movements of the shuttle, the machine of the present invention operates with substantially similar or equivalent relative timing of the several instruments as in the case of the old cam operated machine, except of course for the fact that the movements are smooth and harmonic in character; and the novelty of the invention resides mainly in the novel actuating connections for each of the respective stitching instruments, and in intercombinations of such connections giving coordinated movements. In general, the cooperating instruments, and their timed coactions with each other, are already long well known, and are illustrated, for example, in the patent of French & Meyer 473,870 of 1892, showing the type of machine, while various parts of such machine are shown in the following patents of Reece Shoe Machinery Company, which (Cl. Mil-38) tainment of such objects and advantages the present invention consists in the novel sewing machine and the novel features of operation, combination and construction herein illustrated or described.

In the accompanying drawings Figure 1 is a front elevation'of the upper portion or stitching head of a shoe outsole stitching machine constructed in accordance with the present invention, but with a number of parts omitted or broken away for purposes of better illustration.

Fig. 2 is a rear elevation of similar character.

Fig. 3 is a right elevation, and Fig. 4 a left elevation of the same mechanism, with certain parts omitted or broken away.

Fig. 5 is a right elevation of certain selected parts, pertaining especially to the needle and needle guide and the timed operation thereof.

Fig. 6 is a similar right elevation of selected parts pertaining to the awl or feed point and its oscillating movement, while Fig. 6 is a cross sectional view in a plane extending through the centers of the pins 93 and 94 on Fig. 6. Fig. 7 is a view similar to Fig. 6 showing more particularly the feed connections for longitudinally re-' ciprocating the awl or feed point.

Fig. 8 is a right elevation of the looper and the parts and connections for effecting its operative movements.

Fig. 9 is an inclined section taken on the line 35 9-9 of Fig. 8.

Fig. 10 is a right elevation corresponding in part with-Fig. 8, but with certain parts broken away for better disclosure of other parts.

Fig. 11 is a. left elevation of the same parts as in Fig. 10 with certain of them broken away.

Fig. 12 is an inclined view looking down upon the parts shown in Fig. 8 along the direction of the arrow 12 thereon.

i Fig. 13 is a diagram indicating the approximate preferred motions of the several stitching instruments, as performed herein; with a timing line for each instrument showing its action in each cycle, and the diagram representing one .complete stitch cycle or stitching shaft rotation, with subdivisions into angular degrees, and the zero point representing the positions of the several instruments at the preferred stopping point of the machine.

Describing first some of the general machine parts and actuating elements, the fixed frame part or head 20 may be at the upper end of a tall post so that the operator may stand while handling the work. Bearings 21 give support to a drive shaft 22 which may be rotated for ex= ample by a grooved pulley driven by belt from an electric motor at the base of the machine. Above the drive shaft is what will be termed the stitching shaft 23 turning in an outer bearing 24 at the left and in a first or left hand frame wall 25 and goright hand wall 26, upstanding from the head Instead of gears communicating rotation from one shaft to the other there is shown a system of driving cranks and rods as follows. At the left and right ends of drive shaft 22 are cranks 27 and 28 and at the left and right ends of the stitching shaft 23 are corresponding cranks 29 and 30; these pairs of cranks being connected by rods 31 and 32 having the same effective length as the spacing between the shafts. One pair of cranks and connecting rod being spaced 90 from the other there will always be: effective power communication between the shafts; and this aifords a smooth quiet drive with minimum wear and none of the drawbacks of gearing.

The stitching shaft 23 is shown provided at its left end with a hand wheel 34 used for rotating the shaft manually. Between the bearing 24 and the frame wall 25 the shaft 23 carries a first operating crank 35, having connections for actuating the needle and needle guide, and preferably the thread mechanism. Inside, and between the two frame walls, the stitching shaft has second and third operating cranks, the crank 36 connected for the actuationof the awl and the feed motion, while the crank 37 is connected for actuating the looper. The stitching shaft 23 also carries a gear 38 closely to the right of the left frame wall, from which the shuttle takes its rotation, and between the gear and crank a-cam 39 for effecting certain shifting movements of the block which carries the needle and needle guide.

There may be other connections from the stitching shaft, and some of the motions. may

conveniently be taken from the driving shaft 22 which, for example, carries an eccentric 41 from which the take-up receives its motion, and preferably a second eccentric taking part in. the thread mechanism control.

Referring next to the stitching instruments, with which are included not only the needle and other movable instruments acting directly upon the thread or the work, but certain auxiliary parts or instruments having a special function or motion in the formation of the stitches, these will be designated by letters of the alphabet for purposes of distinction.

Thus the work support A is seen in Figs. 1, 3

- and 4, it being a stationary part in the form of a bracket attached to the left frame wall 25, its

forward extremity arranged to. support the work supplied by shuttle and bobbin, and the latter being fed from asupply and subject to the action of the take-up, and other control means, tension, thread lock etc. Above and opposed to the work support is the presser foot B, indicated in Figs. 1 and 3. This instrument may be released to permit each'feed movement of the work, and be thereafter depressed and locked, or clamped upon the work,

' until the succeeding feed movement, to resist the tendencies of the needle and awl to lift the work. Appropriate actuating connections will be understood, and may be operated from the stitching shaft 23, generally in accordance with the principles illustrated in said prior Patents 1,071,355, 1,171,466, 1,209,340 or 1,229,328.

The cooperative action of the presser foot is sufliciently indicated in the diagram Fig. 13, showing the period of release from the locking action, in relation to the movements of the needle and other instruments. This release is a mere relaxing of pressure to let the work slide through; and the presser foot does not need to be lifted from the work until the completion of the seam, to facilitate the removal of the shoe.

The needle C is best shown in Figs. 1, 4 and 5, and parts of its actuating connections in Figs. 2

and 3. The needle is curved, as usual, and with a barbed point entering the work from above, being mounted on a carrier C oscillating about a point to the rear of and higher than the stitching point or work support. The preferred timing of the needle movement is indicated on the needle curve of the timing diagram Fig. 13, where it is seen to be very smooth; the part marked advanced being where the barb receives the under thread from the looper, and the part marked retracted being where it'delivers the loop to the shuttle, above the work.

Cooperating with the needle is a needle guide D as shown in Figs. 1 and 5, this being mounted on an oscillating carrier D turning on the same axis or center as the needle so as to move concentrically therewith, although moving in partially different timing for purposes well understood, and as indicated on the diagram.

According to one feature of this invention the needle and the needle guide and their mountings are carried bodily upon a slide or block E shown in Figs. 1 and 5, which herein is treated as an auxiliary stitching instrument, this being arranged and fitted to be shifted to a slight extent at a forward and upward slant, while the needle is retracting or ascending after emergence from the work, so that the needle barb will stand somewhat further forward and upward than usual, to the extent of about /gth inch or more; and withdrawn for the return needle movement. This reciprocating motion, and the shifting of the retracted position of the needle barb, are for the purpose of improved cooperation between the needle, the shuttle and the thread arm, rendering I it easier and more certain for the shuttle to extract the thread from the barb without injury to the thread, as will be further described. The relative timing is indicated on the diagram.

The awl F, which also serves as a feed point, is a member which oscillates like the needle, but entering the work support and work from beneath. It is shown in Figs. 1, 3, 6 and 7, with certain actuating connections shown in Figs. 2 and 4. The awl is mounted on a carrier F and oscillates about the same axis as the normal axis of the needle, but with separate mountings, and its function is to perforate the work and withdraw, thus making a passage for the entry of the needle from above; and while engaged in the .work the awl will be given an advancing movement by the feed mechanism to be described, the awl retracting out of the work before the return movement of the feed mechanism, as indicated on the dia-- gram.

The feed slide G is an auxiliary stitching instrument of irregular extension, as shown inv Figs. 1, 3. 6 and 7, and at its lower front portion it carries the oscillating awl carrier F. The feed member or slide functions to shift left and right, the leftward movement being the feed movement, while the awl is in the work, the return movement following the extraction of the awl, as shown by the diagram. The feed slide has a rearward extension G running in a fixed guide, to hold the slide rigidly in proper position.

The looper H below the work is shown in Figs. 1, 3, 4 and 8 to 12. The looper itself is mounted rigidly on a carrying arm H formed with an enlarged hub H and therebyond a guiding extension H as will be further described. The function of the looper is to feed or supply the under thread, which may be waxed or unwaxed, to the advanced needle, the looper cooperating with the thread hook to lay the thread in the barb of the needle, .and having a movement advancing it rightward to the needle for this purpose and retracting it to a removed position, as shown on the diagram.

The thread hook I, shown in Fig. 1, is the member cooperating with the looper and needle below the work as already described. Its actuating connections are not herein shown, but may be in accordance with the prior patents referred to, and driven from shaft 22 or 23. As with the other instruments the preferred movements of the thread hook are indicated on the timing diagram, it advancing forwardly to engage the thread and assist in placing a loop upon the needle barb.

The take-up device J is shown in Figs. 1, 3 and 4, It acts upon the under thread to let out the thread while passing over the shuttle and to take it up, preferably to an extent causing the upper thread to be drawn slightly into the work at the completion of each stitch; the preferred timing of the take-up being indicated on the diagram.

The shuttle K, see Fig. 3, ,is of the rotary type, with a nose or horn K adapted to enter the loop of the under thread as held above the work by the needle and thread arm orfinger L, thereby removing the'threadfrom the barb of the needle and passing it around over the shuttle so as to interlock with the upper thread, which may be waxed, supplied by the usual bobbin mounted on the shuttle. Details of the shuttle and bobbin mechanism .may be as in the prior Patents 1,137; 356, 1,180,546, 1,183,040 or 1,226,705. The shuttle K is shown mounted directly on the shuttle shaft K and it is a feature of this invention that the shaft and shuttle are rotated constantly and at uniform speed, thus dispensing with starting, stopping and speed variation of the shuttle.

This is effected by affording a plurality, for examt ple 3 idle rotations of the shuttle for each active rotation, as the diagram indicates. Another feature in respect to the shuttle is that its axis of,

rotation is tilted decidedly upward so that the nose of the shuttle after engaging with the thread applies a pulling motion which is not merely upward but is at a substantial rearward incline, thus greatly facilitating the clean shedding of the loop by the needle barb.

The thread arm L shown in Fig. 1 cooperates with the needle and the shuttle above the work, its preferred motion being indicated on the dia gram. With the needle and the work the thread finger forms the thread into a triangular, loop entered by the nose of the shuttle, as will be well understood to those conversant with the subject.

The various parts of the thread handling mechanism. other than those mentioned, including a tension device, thread locks and thread measuring device, for the under thread, may be in accordance with known practise see for example said prior Patents 1,124,525, 1,209,340 or 1,210,- 545.

In the drawings the several stitching instruments are shown in the final positions which they would occupy upon the stoppage of the machine, to permit the removal and insertion of the work, the needle, needle guide, awl and feed slide being in their retracted positions; and there may be a stop motion giving definite final position, and releasing and lifting the presser, to wholly free the work. With this fact in mind the relative positions, or angles of the cranks etc. on the stitching and driving shafts are made clear by comparison of the respective views. Thus, referring to Figs. 3 and 4, the center or axis of the shaft 23 is marked 23*, while the axis of the first crank 35 is marked 35*. So, on Figs. 6 and 7 the shaft axis is marked 23* while the axis of the second crank 36 is marked 36"; and on Fig. 8 the axis of the third operating crank 37 is marked 3'7.-

The direction of rotation is clockwise in these right elevations.

Referring in detail to the connections actuating the needle from the crank35, these include a relatively short pitman 45 extending from the crank to the free end of a long lever or radius arm 46 fulcrumed at a fixed pivot 47 forward of the shaft, this radius arm determining the movement' of the free end of the pitmah as the crank revolves. From the juncture or pivot connecting the pitman and arm extends a link 48 to the rear free end of the arm 49 of a rocking lever pivoted on a fixed fulcrum 50 and having a second or forwardly extending arm 51 which in turn is connected by a link 52- to the needle carrier C, mounted to oscillate about a fixed position axis 53. By these connections one rotation of the stitching shaft moves the needle forward and down to penetrate the work, and receive a loop below the work, and retracts it through the work, the needle rising to where it gives up the loop to the shuttle; the complete movements being indicated on the timing diagram Fig. 13.

The connections for actuating the needle guide commence with the lever 49-5l, this having a downwardly extending short arm 55, the free end of which is connected by a link 56 to a block I carrier D, which is thus made to oscillate about the fixed axis 53 in accordance with the diagram and in conjunction with the needle movement.

Referring next to the block or slide E on which the needle and needle guide have a rotary mounting, this may be reciprocated by the cam 39 on the stitching shaft by the following connections. The cam is in the nature of a triangular cam, being surrounded by a fork '71 adapted to be contacted constantly by the cam at all four sides.

The fork has a forwardly extending shank '72 pivoted directly to the stem '73 of the slide block E. The block has a dovetail sliding fit within a fixed guideway '75. As the cam is shown positioned these parts are in their forward position and therefore the point of the needle is abnormally forward, and a dot 76 has been placed approximately in the position to which the needle point would have retracted but for the bodily forward movement of its supporting parts. This difierence greatly aids the removal of the loop by the shuttle, especially in coaction with the tilted shuttle that pulls the thread both rearwardly and upwardly from the barb.

Coming to the awl F mounted on its oscillating carrier F, this is best shown in Figs. 1, 6 and 7. Referring particularly to Fig. 6, the awl may be oscillated from the second crank 36 by the following connections. A pitman extends from the crank to a radius arm 81 which controls the movements of the free end of the pitman. The upper end of the arm 81 is fulcrumed on a pivot 82. To permit initial adjustment of the awl and its proper range of motion the fulcrum 82 may be adjustably shiftable up and down by being mounted-on the small arm of a lever 83 fulcrumed at 84 and having at its other arm a screw adjusting device 85.

From the common pivot of the pitman 80 and the arm 81 extends forwardly a long link 87, its free end pivoted to a block 88 slidable in a curved guideway 89. Between the block and the awl carrier F extends a link 90 through which the oscillating movements are communicated to the awl. Suitable provision is made for allowing the left and right shift of the awl and carrier during the feed action and return.

The feed motion orleft and right reciprocation of the awl and carrier may be taken from the same crank 36 through a second pitman 92, Figs. 6 and 6*, this having a pivotal connection 93 with a radius arm 93. These parts are shown also in Fig. '7 on which figure the remaining connections are indicated. At the junction of pitman 92 and arm 93, on the pivot pin 98 are mounted a pair of eccentric disks 94. These disks are pinned at 94 to a pair of extensions 92 of the pitman 92. From the eccentric disks there takes off a link 95, its bifurcated circular end parts engaging the two disks. The operation of the eccentric 94 gives to the link 95 a pivot point diiferent from that connecting the arm 93 with the pitman 92, thus serving to modify the resulting motions in a manner to deliver the correct timing of feed as shown in the diagram. The link 95 extends to a block 96 slidable in a fore-and-aft curved slideway 97 on a -fixed bracket 98. A link 99 extends from the block to the lower end ofa lever arm 100 attached to a long rock shaft 101 from the near or right end of which extends also an arm 102, the upper free end of which is connected by a link 103 with a rock arm 104 extending rearwardly from a rock shaft 105 on which is also secured a rock arm 106 having at its forward end a double fork 107 straddling squared blocks 108 swivelled upon an upwardly and downwardly slidable rod 109 working in bearings 110 and 111, all is clearly shown in Figs. 1 and '7.

The rod 109 thus reciprocable upwardly and downwardly carries at its top end a fork 112 engaging the opposite sides of a stud 113 slidable in a slot or recess 114 formed in the rightward arm 115 of a bell crank lever fulcrumed at 116 on a fixed bracket and having a slotted upwardly extending arm 117, this arm therefore oscillating rightwardly and leftwardly. A block 118 is adand moves along a cylindrical axle 121, with a 30 length of bearing ensuring easy motion without wear. Rocking of the feed slide is prevented by means of its rearward extension G, the extremity of which is squared and runs in a horizontal guide 122.

The looper H is seen in Figs. 1, 3, 4 and 8-12, and .its actuating connections partly in Fig. 2. As already stated the looper itself, which has a hollow terminus, through which the under thread is supplied for looping upon the needle, is mounted in a looper lever H of irregular shape, this in turn being formed rigid with a circular hub H to the right and rear of the stitching point, the hub having an extension H by which it is properly guided. The purpose of the looper, as usual, is to advance rightward to bring the thread up to the advanced position of the needle barb, the looper and thread hook cooperating to place the thread on the barb, and the looper subsequently retracting leftward, all as indicated in the diagram Fig. 3.

The hub H of the looper turns freely upon a circular member 125. This member however is not stationary but is'mounted to turn upon an axle- 126 fixed in a bracket 127, as best seen in Fig. 8. The axle or stud 126 is eccentrically located in the member 125, so that the movements of the latter are eccentric, and effect movements of the hub H as well shown in Fig. 12. The stud or axle 126 being at an incline, as seen in the right hand elevation Fig. 8, the movements of the looper parts H, H, H, H will be in planes at right angles thereto, the oscillating movement of the looper, to be described, being in a corresponding plane, for effective cooperation with the needle and thread. hook.

The eccentric 125 is arranged to be oscillated through its underneath flange 128, which at one side has an extension carrying a sphere or a portion of a sphere 129, connected, as will be described, for oscillation from the third operating crank 37. Adjustment of the position and throw of the eccentric with respect to its carrying flange 128 may be effected by a bolt and slot adjusting device 130, as seen in Figs. 8 and 12.

The extension H of the looper hub is for guiding purposes and is formed with an elongated slot occupied by a block 131 turning upon a fixed stud 132 extending downwardly from a bracket 133, as best seen in Figs. 1, 8 and 12. When the eccentric oscillates in reverse directions the extension H fected by connections from the crank 37 to the sphere 129 as will now be described.

On the crank 37 is a pitman 137 having two forward extensions which may be termed the left fork 138 and right fork 139, as shown in all of Figs. 8*to 12. As shown in Fig. 9 an irregular shape stud member connects the forward ends of the forks 138 and 139, comprising a stud portion 141 engaging the fork 138, and adjacent the same a spherical portion 142, and therebeyond a stud portion 143 eccentric with 141 and engaging 150.

ill

ma am the fork 139. Engaged on the stud portion 141 is the hub of a radius arm 144 which at its upper end is mounted for swinging about a fixed stud or axle 145, as shown also in Fig. 2, thus determining the movements of the pitman as the crank revolves. Surrounding the stud portion 143 is shown a collar 147 fixed thereon, its periphery flattened at opposite sides to receive a fork 153 to be described.

Engaged on the spherical surface 142 is a head 149 correspondingly shaped, to constitute therewith a universal connection; this head being formed at the rear'end of an inclined connecting rod 150, the forward end of which is provided with a head 151 engaging the sphere 129 extending from the eccentric flange 128 already described. Cooperating with the head 151 is a plate 152 confining the head upon the sphere thus constituting a universal joint at the forward end of the connecting rod 150. By this means the oscillating movement of the pivotal connection between pitman 137 and radius arm 144 is communicated as an inclined oscillation of the eccentric 125, which in turn delivers the looper movements already described.

A fork 153 is shown having two of its arms straddling the squared collar 147 of the stud 143, the outer end of the fork being attached by a threaded pin 154 with the connecting rod 150.

At the left side of the head 149 is shown a threaded collar 155 engaged within the head, and forming part of the spherical surface engaging the sphere 142. This permits assembly, and the collar 155 is held against rotation by attachment to the connecting rod 150 by the threaded pin 154.

The sphere or head 142 is shown as formed with an extension 157 having a pair of lugs 158 straddling the left fork 138 of the pitman 137, thus preventing rotation of the head 142 and studs 141, 143, relative to the pitman.

The take-up comprises a thin disk J carrying a thread pulley or grooved wheel J adapted to be shifted as the disk oscillates, and this pulley cooperates with a pair of pulleys 164 and 165 turning on fixed axes, and supported on a suitable bracket. For example, the thread may come from a supply and pass forwardly over the pulley 164, thence down and around the pulley J and thence up and around the forward side of pulley 165 and thence to the looper H.

A modification of looper motion is intended, wherein the thread guiding part of. the looper is vibrated along the direction of the thread, during the thread movements, so as to minimize relative sliding and abrasion of the thread.

The take-up disk J may have an offset hub or extension J shown dotted in Fig. 3, this being enclosed, with easy running bearing, within a fixed housing or support 166, set in a fore-andaft plane, as shown also in Figs. land 2. Projecting rightward from the take-up disk J is' a crank or pin 167, above the center of oscillation, by which the disk is oscillated for the take-u and thread giving movements.

The take-up actuating connections may be as follows. Commencing with the eccentric 41 on the drive shaft 22 this is shown as surrounded by a strap 168, from which extends an arm or connecting rod 169 with its forward or free end connected to the crank 167. In operation, as the center of the eccentric travels clockwise around shaft 22 the pin 167 moves orbitally counterclockwise, due to the slotted arm 169 swinging and sliding on a swivel fulcrum as shown hereon and as more fully described in divisional application 609,827. The pin is radially slidable on the disk and travels counterclockwise in Fig. 3 at varying speed. As shown, the thread wheel J is retracting downwardly and attaining its maximum speed, while later it will return upwardly at slow speed, giving thread in an efiective cooperation with the looper, etc. Owing to the cooperation of the take-up pulley J with the two fixed pulleys, a relatively small retracting movement of the take-up gives a double extent of actual takeup of thread.

With the illustrated design of parts the motion may be substantially as shown in the diagram Fig. 13.

It is not believed to be necessary to a disclosure of the invention to describe as to the several trains of mechanism from the shafts 22 and 23 to the various stitching instruments, and each of such trains. Taking for example the needle C, needle guide D and slide block E, and their actuation, the trains of mechanism from the shaft 23 to the instruments are fully shown in Figs. 1 to 5, including crank 35 with its pitman 45, and cam 39 with its follower 71, and the arms, links, levers, slides, etc. therefrom to the instruments. The paths of movement will be understood from the illustrations, and the timing is' calculable therefrom by one conversant with machine design principles; so that the motion diagrams of'Fig. 13 are readily demonstrable, as they have actually been demonstrated as to their paths, timing and cooperation. Various features herein disclosed have been covered and claimed in divisional applications as follows: the driving mechanism has been made the subject of claim in divisional application Serial No. 609,373, filed May 5, 1932; the take-up mechanism has been made the subject of claim in divisional application Serial No. 609,827, filed May 7, 1932; the looper mechanism has been made the subject of claim in divisional application Serial No. 621,550, filed July 9, 1932.

Having thus described a sewing machine of the class and type first referred to, which embodies the principles of the present invention, it is not intended to limit the'invention to matters of operation, arrangement or structure except to the extent set forth in the respective claims.

What is claimed is:

1. In a power driven machine for stitching leather ..or shoes, in combination with the stitching s'haft having a crank, of a curved needle mounted on an oscillating carrier, a pitman on said crank, a radius arm controlling the pitman, a link connected to the pitman, a lever oscillated by the link and a link from the lever to the needle carrier; proportioned and timed for harmonic needle motions in coordination with the other instruments.

2. A machine as in claim 1 and wherein is a needle guide, and connections from said lever'for actuating said guide in cooperation with the needle.

3. In a power driven stitching machine, a curved barbed needle, an oscillating carrier therefor, a shuttle for taking a loop from the retracted needle, a support or block on which said carrier is pivoted, the same being shiftably mounted, and connections for shifting said support as the needle retracts to modify the retracted position of the needle barb and thereby facilitate the taking of the loop from the needle by the shuttle.

4. A machine as'in claim 3 and wherein the shaft, connections from the shaft for oscillating the needle, and other connections from the shaft for oscillating the awl in coordination with the needle, the latter connections comprising a crank on the shaft, a pitman, a radius arm, and link connections to the awl carrier, substantially as described.

'7. A machine as in claim 6 and wherein is means for adjusting the position of the pivot of the radius arm to set the movement of the awl.

8. A machine as in claim 6 and wherein the awl carrier is pivoted to a feed slide, and connections from the same crank for advancing and retracting the feed slide in coordination with the awl oscillation.

9. In a power driven stitching machine having a curved needle operating from above and a curved awl operating from below the work, a shaft, connections from the shaft for oscillating the needle, and other connections from the shaft for oscillating the awl in coordination with the needle, a feed slide reciprocable substantially parallel to the shaft and carrying the oscillating awl, and connections from the shaft for reciproeating the feed slide in coordination with the needle and awl, comprising a crank, a pitman, means determining the movement of the pitman, a link and devices actuated by the pitman movable in planes at right angles to the shaft, devices movable in a plane parallel to the shaft and connected for reciprocating the feed slide, and a connection between the first devices and last devices communicating the actuation thereto, substantially as described.

10. In a power driven stitching machine having a curved needle operating from above and a curved awl operating from below the work, a shaft, connections from the shaft for oscillating the needle, and other connections from the shaft for oscillating thea'wl in coordination with the needle, a feed slide reciprocable substantially parallel to the shaft and carrying the oscillating awl, and connections from the shaft for reciproeating the feed slide in coordination with the needle and awl, comprising a crank, a pitman, means determining the movement of the pitman, a link and devices actuated by the pitman movable in planes at right angles to the shaft, a slidable bar (109) movable along aline at an intersection of a plane at right angles to said shaft with a plane parallel to said shaft and reciprocated by said link and devices, and connections from said bar to the feed slide for reciprocating the latter.

11. In a two-thread barbed-needle stitching machine, a horizontal work support, an oscillating needle above thework, and a shuttle having its nose in position to take a loop from the retracted needle, with means for rotating the shuttle at a continuous uniform speed such that in each cycle it makes one active rotation and a plurality of idle rotations; said needle having means for shifting it bodily forward during retraction and said shuttle rotating means comprising an inclined shaft such that the shuttle nose moves rearward and upward while taking a loop from the needlebarb.

12. In a two-thread barbed-needle stitching machine, a horizontal work support, an oscillating needle above the work, and a shuttle having its nose in position to take a loop from the retracted needle, with means for rotating the shuttle; said needle having means for shifting it bodily forward during retraction, and said shuttle rotating means comprising an inclined shaft such thatv the shuttle nose moves rearward and upward while taking a. loop from the needle barb.

13. In a power driven machine for stitching leather or shoes, in combination with the stitching shaft having a crank, of a curved needle mounted on an oscillating carrier, a pitman on said crank, an oscillating needle guide, connections from the pitman to the needle carrier and guide-to actuate the same in different but coordinated timing, and means actuated from the stitching shaft for shifting the needle carrier bodily forward during each retracting movement.

JOHN ROGER OLIVER.

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