Патент USA US2410859код для вставки
Nov. 12, 1946. c. w. BAKER 2,410,859 SHOE SEWING MACHINE Filed Aug. 29, 1944 2 Sheets-Sheet l Nov. 12‘, 1946. c. w. BAKER 2,410,859 SHOE SEWING MACHINE Filed Aug. 29, 1944 2 Sheets-Sheet 2 Patented Nov. 12, 1946 2,410,859 UNITED STATES PATENT OFFICE 2,410,859 SHOE SEWING MACHINE Corwin W. Baker, Stoneham, Mass, assignor to United Shoe/‘Machinery Corporation, Flem ington, N. 3., a corporation of New Jersey Application August 29, 1944, Serial No. 551,669 13 Claims. 1 The present invention relates primarily to im provements in shoe sewing machines constructed and arranged to sew the upper to the sole of a shoe ‘which is unsupported on a last and, more (01. 112-62) 2 will be e?ective in applying pressure to the work during stitch formation and in relieving the pressure to prevent needle ?exure during work feed. There is a likelihood that the pressure of particularly in some aspects, to machines of the r" the horn on the work will be retained during the type disclosed in United States Letters Patent to feed if insu?icient motion is imparted by the op Edward Quinn No. 2,142,966, granted January 3, erating mechanism, the resiliency of the horn re 1939, and No. 2,332,599, granted October 26, 1943, quiring an excessive amount of motion before the and United States Letters Patent to Edward pressure is fully relieved. Where insu?icient mo Quinn and Alfred E. Morrill N0. 2,198,391, granted 10 tion to compensate for the resiliency of the horn April 23, 1940.. is imparted, the pressure of the horn against the The machines of these patents have stitch work will be increased and decreased during each forming devices including a straight hook needle sewing cycle without fully relieving the pressure. movable to feed the work, and a straight awl act If suf?cient motion is imparted to the horn mech ing to form a needle receiving perforation in the 15 anism, it may be a source of such excessive vi work,- the needle and awl being arranged with ‘bration that the machine must be slowed down to their points directed toward each other and the accommodate it. If the pressure of the horn work being clamped between a work support and against the work is not fully relieved while the presser foot during penetration and retraction of work is unclamped and the needle is ?exed as a the needle and awl. Before each feeding move 2'0 result, the work will become displaced from op ment of thework starts, the presser foot is ac erating position and, after the needle is with tuated to relieve its clamping pressure on the drawn, it will re-enter the Work at a’ position‘ out work and the work is supported principally by of line with the stitch previously inserted. Even; the needle. tually, after a series of sewing cycles, objection A machine of the type disclosed in the above 25 able work displacement will 'occur unless the op mentioned patents is intended'to operate upon a erator forcibly restores the work to proper po turn shoe or slipper in which the upper has pre sition in the machine. Furthermore, the horn viously been attached temporarily to the sole requires a supporting carrier, which adds further edge having a shoulder undercut with a stitch re factors of resiliency and lost motion in the horn ceiving groove. The machine applies permanent 30 mechanism, particularly where light-weight con fastenings to the parts, comprising a row of struction is essential from the standpoint of ra stitches passing through the upper and the sub pidity of operation and freedom from excessive stance of the sole between the shoulder in the sole ‘ vibration. In the patented machines,‘ the‘ sup edge and a stitch receiving channel spaced uni porting carrier for the horn extends downwardly formly from the sole edge, the needle entering 35 from the upper portion of the machine and tends and emerging ‘from the same side of the sole. to obscure the operator’s line of vision of the The machine is provided also with a U-shaped work. Under. some circumstances, such a down horn of relatively light, resilient construction. wardly extending carrier also may interfere with The horn entersthe ankleuopening of the shoe proper manipulation of the work as the sewing being operated upon and presses the sole'later 40 operation progresses. ally against the stitch forming and clamping Due to the resiliency of the horn, itscarrier members to retain the shouldered edge- and chan and actuating mechanism’ of the patented ma nel of the sole in proper sewing position while chines, it is di?icult to adjust the actuating mech the needle and awl operate. . - anism for a full release of the pressure of the In a sewing machine having stitch forming de 45 horn on a thick sole and to provide adequate vices comprising straight work penetrating in pressure for a thin, vfragile sole, since the move struments, the flexibility of the penetrating in_ ment required to take up the resiliency may be struments is greater than in a curved needle ‘greater than required in imparting a pressurere type of machine and the penetrating instruments leasing movement to the horn.~ If adjustments are subject to greater flexure, particularly when 50 for athin-sole are madeand sole material of‘in lateral pressure is applied to the work. 1 With a straight needle machine equipped with a horn of the type referred to for imparting lateral pres creased» thickness is operated upon, the pressure of the horn against the sole will beexcessive and, as a result, the sole will be indented or cut by the work engaging surfaces of the presser foot sure to the work, it is difficult to provide high speed operating mechanism for the horn which 55 and work support, which latter is formed with 2,410,859 3 narrow channel entering edges. When the work is indented or cut, the feeding movements are impeded by the resistance offered in disengaging the indentations from the edges of the work sup port. If adjustments are made for a thick sole, the horn pressure on a thin fragile sole will be 4 the sole yieldingly throughout each sewing cycle toward the center of curvature of the work pene trating instruments with a uniform pressure. Accordingly the necessity of complicated horn locking and actuating mechanisms such as are employed in the patented machines are avoided. Such a construction is rendered possible when the work penetrating instruments comprise a displaced from the work support during forma curved awl and needle because of the inherent tion of a stitch at a time when the sole should be 10 rigidity of said work penetrating instruments subjected to a secure clamping pressure. against ?exure toward their center of curvature. Furthermore, the straight needle of the pat The supporting members for the work penetrat ented machines does not lend itself to precisely ing instruments also are less ?exible than the uniform lengths of stitches during sewing oper corresponding parts in a straight needle machine ations where the feeding movements are impeded in any degree. The straight needle which imparts 15 so that while the clamping pressure of the presser foot and work support on the shoe is released the feeding movement to the work may become the shoe will be retained in proper sewing posi ?exed excessively by the feed impeding pressure tion by one only of the work penetrating instru of the horn on a thick sole as a result of incom ments engaging the shoe. plete release when the mechanism has been set In the illustrated form of the present machine, for a relatively thin sole. This condition is 20 the mechanism for supporting and actuating the aggravated by the resistance to work feed offered too light and the channel in the sole may become as a result of Work indentation. As a means horn includes a carrier on which the horn is mounted for swinging movement and a spring for avoiding displacement of a relatively thin acting on the carrier to urge the sole with a fragile sole from between the work support and presser foot of the patented machines while the 25 continuous yielding pressure in the desired direc tion, no other mechanisms being required for clamping pressure of the presser foot is released, actuating the horn during sewing operations to there is disclosed in the Quinn Patent No. avoid displacement while the shoe is unclamped. 2,332,599, a set of movable work engaging ele Preferably the horn is of U-shape with one arm ments on the work and presser foot acting to guide the sole yieldingly and to prevent the edges 30 of sufficient length to enter the extremity of the toe in the largest size of shoe intended to be of the work support from becoming disengaged operated upon, and with the other arm of the from the channel. horn mounted for swinging movement on the To prevent undesirable indentation of the sole, carrier about an axis disposed radially of the the horn of the patented machines is actuated with a relatively light clamping pressure during 85 needle path. The carrier also is U-shaped with each sewing cycle at the end of each feeding movement and is locked in position during stitch formation to prevent the sole from being disen gaged from between the work support and presser its horn supporting arm of sufficient length to provide clearance space for the heel end of the largest size of shoe- operated upon. As a simple means for mounting the carrier on the machine so foot. The mechanism for locking and unlock 40 that it may move the horn yieldingly toward the sole of the shoe, the carrier has a pivot on the ing the horn at the proper times during each frame of the machine extending substantially sewing cycle adds to the expense of manufac parallel to the line of feed. Mechanism also is ture and upkeep of the machine and increases provided in the illustrated form of this feature the likelihood of disarrangement. Accordingly, a greater degree of skill and ability must be 45 for actuating the carrier at the end of a seam to move‘ the horn away from the sole of the shoe exercised by the operator than when such mecha so that the shoe may readily be removed from nism is not employed. the machine and a new shoe substituted. The principal objects of the present invention It is the usual practice in sewing. the inseams are to provide a simple and effective machine for performing the same type of work as that ac 50 of turn shoes to employ a curved hook needle chain stitch machine so arranged as to lay the complished with the machines of the above-iden double threads of the chain against the upper of ti?ed patents in which the difficulties arising the shoe, thus reinforcing the upper and provid from ?exibility of the work penetrating instru ing a form of padding or ?lling for the bend in ments, the horn, its carrier and actuating mecha nism are largely avoided and in which a reliable 55 the upper after the shoe is turned inside out. The common form of machine in which the pres feeding movement with an unobstructed view of ent invention is embodied, as hereinafter further the work may be obtained during operation of explained, is constructed to insert a lockstitch the machine without frequent and complex ad seam with but a single thread laid against each justments or the provision of complicated horn 60 shoe part. or other operating mechanisms. A further object of the invention, accordingly, is to provide a novel improved sewing machine of the type referred to for laying a plurality of threads in a lockstitch seam against that portion of a turn shoe while unsupported on a last, hav ing a work support to engage a stitch receiving 65 of a turn shoe upper which is supported by the edge of a shoe sole according to accepted turn channel formed in the sole, a presser foot acting shoe practice while at the same time retaining against the upper at the edge of the sole to to full advantage the strength and durability of clamp and release the shoe on the work support, the lockstitch seam. To provide suitable rein a horn extending through the ankle opening forcement for the upper, according to a feature of the shoe being operated upon and engaging of the invention. therefore, two parallel lengths the inner surface of the sole, and stitch forming In accordance with these and other objects, the present invention is illustrated as embodied in a machine for sewing the upper to the sole devices including one or more curved work pene of locking. thread are led into the seam and laid against the upper at the edge of the sole, thereby trating instruments acting to support the sole providing the same reinforcement to the upper in position against the thrust of the horn while the sole is unclamped, the horn acting to press 75 as when sewed in a chain stitch machine. In 2,410,859 . 6 v5 the embodiment of this feature, the thread case relieved, the work being supported in sewing po: within which the locking thread supply is en sition during this interval of each sewing cycle principally by the awl. To assist in the'feeding movement of the work the work support mem ber HI which engages the channel in the sole in closed is provided with two rotating thread pack- ' ages from which parallel lengths of locking thread are directed against the exposed surface of the upper, the packages being arranged to rotate in opposite directions during withdrawal of thread advance of the awl moves with the awl in the line of the seam while the member I2 remains so that the rotation of one package will not stationary. During back feeding movements of slacken or interfere with the tension required to the awl the member it] opens the channel for the withdraw thread from the other package. In this 10 awl. ' way, any possibility of entanglement of locking Referring more particularly to Figs. 4 to 7, in threads within the thread case or of irregular for clusive, of the drawings, the turn shoe illustrated mation of stitches is avoided in the completed as being operated upon comprises an upper 28, seam from this cause. cut to the proper size to form the shoe without Other features of the invention consist of the 15 excess of material and a sole 30 having a stitch devices, combinations, arrangements and parts receiving channel 32 and a shouldered edge 34 hereinafter described and claimed which, to molded to provide a groove opposite thebase of gether with the advantages to be obtained, will the channel within which the nibs on the presser . readily be understood from the following descrip foot project. The upper is temporarily attached tion taken in connection with the accompanying 20 to the shouldered edge 34 by cement and before drawings, in which the machine is started into operation the chan Fig, 1 is a, view in front elevation of a curved nel 32 of the sole is engaged with the support hook needle l-ockstitch shoe sewing machine em members In and I2 and the presser foot com bodying the present invention, only so much of presses the substance of the sole and clamps the the machine being illustrated as is necessary for 25 upper and sole in sewing position. When the a complete disclosure of the invention; machine is started the awl ?rst enters the chan Fig. 2 is a detail side sectional view on an en nel and emerges from the same side of the sole larged scale of the shuttle, locking thread case through the surface of the shoulder 34 and and double locking thread supply within the through the upper, as illustrated in Fig. 5. As thread case employed in the machine of Fig. 1; 30 soon as the awl has penetrated the parts of the Fig. 3 is a sectional plan view taken along the line III-1II of Fig. 2, illustrating. the thread case shoe, the presser foot releases its clamping pres constructions ; Fig. 4 is a view in right side elevation and part movement to the position of Fig. 6, carrying the ly in section, of the machine of Fig. 1; _ Fig. 5 is a perspective detail View on an en larged scale, illustrating the method of opera tion of the stitch forming and work clamping de sure on the upper, and the awl is given a feeding awl perforation in the sole and upper into line 35 with the needle. Thereafter, the needle enters the upper along the shoulder 34 and emerges from the channel 32 to receive a loop of thread. Upon retraction of the needle, the needle loop is drawn through the work and is carried about the thread vices, particularly during the beginning of the feeding movement of the awl; 40 case by the shuttle in the usual way. After being Fig. 6 is a similar view,‘ illustrating the posi drawn from the shuttle, the needle loop is con tracted by a take-up 39 until the locking threads tions of certain of the parts at the end of the are drawn into engagement with the outer sur feeding movement; and face of the upper in the manner illustrated, the Fig. 7 is a detail View, partly in section and on a further enlarged scale, of a portion of a sewed 45 sole being clamped and supported by the work support and presser foot and maintained in sew shoe after turning it inside out. ing position by a horn, as will be further ex The sewing machine disclosed in thedrawings plained. has a work support consisting of two relatively movable, relatively thin, wedge-shaped channel As has been stated, the means to press the sole ’ engaging members I0 and 12 the latter of which 50 against the work support members it! and I2 and ?rmly into the space between the work support is ?xed to the frame of the machine, a curved hook needle [4, a curved awl 56, a work clamp ing presser foot I 8 having a pair of nibs on its and presser foot at a position to be engaged prop erly by the stitch forming devices‘while the parts work engaging surface to insure proper clamping are clamped by the presser foot, the machine is action along the outer shouldered edge of ‘a sole 55 equipped with the shoe entering horn indicated at 36, extending through the ankle opening of in a slipper turn type of shoe, and a rotary needle the shoe upper and bearing against the inner sur loop-taking shuttle 20 within which is disposed a locking thread case 22. The machine is sub stantially the same, except as hereinafter de scribed, as that disclosed in United States Let face of the sole with a uniform yielding pressure at all times during sewing operations. The horn 60 36 is roughly of U shape with one ‘arm of‘greater ters Patent No. 1,169,909, granted February 1, length than the depth of the largest size of shoe to be operated upon from the ankle opening to 1916, upon an application of Fred ‘Ashworth, and No. 2,271,611, granted February 3, 1942, upon an the extremity of the toe. The other arm of the application of Fred Ashworth and Carl F. Whit horn has an integral stud 38 supported in a bear aker, the needle and awl being, mounted for os 65 ing 48 the axis of which is disposed radially of the needle path. The bearing 40 is adjustably cillation upon a supporting stud 24, closeto the sewing point, and the presser foot l8 being mount secured in a standard d2 having a downwardly extending cylindrical lug clamped by a screw 43 ed for work clamping movement on a pivot 26. within a socket 44 in one arm of a U~shaped car The curvature of the needle and awl is con centric with the axis of the stud 24 so that they 70 rier 45, the other arm of which is pivoted at 48 present their greatest rigidity and resistance to to the machine ‘frame for swinging movement ?exure along a line extending radially toward about an axis extending parallel to the seam line. the axis of stud 24. The work is fed in the ma When the screw 43 is loosened the standard 40 chine while the awl engages the work and the may be raised, lowered or swung within the socket work clamping pressure of the presser foot is 75 to right orleft to bring the point of engagement 2,410,859 8 7 of the horn and shoe sole into line with the sewing point. ' The carrier 46 is formed with a sufficiently long U bend beneath the horn stud 38 to provide a clearance space for the heel end of the largest size of shoe when the sole engaging'end of the horn extends within the toe of the shoe. The arrangement is such that unobstructed rotation of the shoe and horn may take place about the sufficient distance to cause the set screw 58 to force the carrier 46 below its pivot 48 rearwardly. thereby disengaging the horn above the pivot 48 from the shoe sole. The work support member ID is moved with the awl to assist in work feed and so that the channel in the sole will be opened in advance of the point of awl operation during back feeding movements of the awl. The member I 0 is formed with a stud 38 without interference and the carrier being 10 shank portion secured within a chuck 59 mounted on a movable carrier block 6|. The carrier block disposed beneath the horn stud 38 in no way ob is arranged for oscillation in the line of feed and scures the shoe or the point of operation from is connected with the awl feeding mechanism, as easy visibility. more fully disclosed in Patents No. 1,169,909 and To urge the horn yieldingly in a radial direc tion toward the center of curvature of the awl 15 No. 2,271,611 above referred to. The chuck 59 in the machine of these latter patents is arranged to and needle, the carrier 46 is acted upon at a loca receive a work channeling or grooving knife when tion below the pivot 48 by a compression spring the work so requires. By utilizing the chuck 59 50 supported on a post 52 projecting from a slotted to secure the work support member [0, a simple block 54 through the slot of which pass a pair of clamp screws 56 threaded into the machine 20 rearrangement of the machine of these patents may be made to adapt the machine for use in frame. Loosening the clamp screws 56 enables sewing turn shoes. Before the shank of the sup the position of the block 54 to be changed and port member ID is secured by the chuck, the the yielding force of the spring 58 to be varied. vertical position of the support member may be No mechanism in addition to the spring 55 is employed for actuating the horn toward the work 25 adjusted in the chuck to suit the operating condi tions of the machine. In some instances, the support and presser foot or for locking the horn support member may be formed with a cutting during sewing operations. The horn is main edge to increase the depth of the channel in the tained with a uniform yielding pressure while each stitch is being formed as well as during feed of the sole and upper. The construction ofthe horn and its carrier is such as to provide sole if needed. To reinforce the upper along the line of the seam at a point which is subject to heavy tension during wear of the shoe, in the use of the illus trated machine, instead of employing a single a substantial degree of resiliency which, together with the resiliency of the spring 51), enables the locking thread, a pairYof parallel locking threads work engaging end of the horn to move toward are led into the seam in such a way that they and from the work support as the thickness of the will be laid against the upper and, preferably, sole varies without a substantial change in the intensity of the pressure. The rigidity of the as indicated in Fig. '7, the loops of needle thread are not tightened sufficiently to draw the locking work support, presser foot, needle and awl is so much greater in a curved needle type of machine threads beneath the outer surface of the upper. than in a ‘straight needle machine that the prob 40 By so doing, the force of each needle thread loop lem of maintaining a shoe in sewing position dur in tightening a stitch is distributed along two parallel lengths of locking thread extending be ing sewing is not troublesome. As a further tween the adjacent needle loops, and the parallel means to prevent displacement of the upper or upper and lining of a shoe in advance of the point locking threads serve to ?ll out and support the of operation in the machines of the patents above upper when the shoe is turned inside out accord identi?ed, they are provided with an upper guard ing to the usual practice in the manufacture of acting opposite the sewing point. Due to the the turn shoe. greater rigidity of the work clamping and pene The locking thread supply case 22 is substantial trating instruments in a curved needle machine, ly the same as that disclosed in the patent to successful sewing operations may be performed 5,1 Ashworth except that instead of having a single without utilizing the equivalent of an upper guard so thread outlet in the circular side wall of the thread in such machines. case, as in the Ashworth machine, there are in In order to facilitate removal of a sewed shoe the present machine a pair of outlets one of which and the presentation of an unsewed shoe at the is indicated at ‘H3 in close proximity to each other. end of a sewing operation in the machine dis A pair of threads leave the outlets in parallel rel closed herein, the presser foot is lifted from en ation and are engaged by a tension spring 12 gagement with the shoe upper automatically in of a construction similar to that in the Ashworth the illustrated machine in the same manner as in machine, the thread being led into the seam and the machine of the Ashworth patent and at the carried against the outer surface of the upper by same time the horn is moved radially of the successive loops of needle thread, as illustrated needle path positively away from the shoe sole 60 in Figs. 5, 6 and 7. through connections with the presser foot. These The supplies‘ of locking thread are contained connections comprise a set screw 58 mounted in within the thread case 22 on a pair of similar bob a pin 60 extending laterally from a lever 62 into bins 14 and 76 rotatable upon a central split a position close to the pivoted arm of the horn stud 18 in the thread case. If both bobbins are carrier 46. The lever 52 is fulcrumed on a stud 65 mounted upon the stud ‘I8 to turn in the same 64 in the machine frame and has an upwardly direction while looking threads are being with extending arm connected through a link 65 with a drawn, one bobbin will always rotate faster than downwardly extending arm of a presser foot the other unless the diameter of the thread supply lever 63. During normal sewing operations, the set screw 58 is out of engagement with the horn 70 on one bobbin is exactly the same as on the other. If. one bobbin rotates faster than the other the carrier 45 even at the time in each sewing cycle tension on the corresponding locking thread when the presser foot releases the clamping pres will be greater than on the other due to the frictional force exerted on the slower bobbin by matically lifted from engagement with the shoe a 75 the faster bobbin and as a result the thread may sure on the shoe for feeding movements. At the end of a seam, however, the presser foot is auto 21,410,859 I I’ ' I become slack and entangled in the thread case TOY shaped .horr'ii one arm of which is of greater length than the depth of the largest sized shoe and irregularities may be produced in the seam. In order to insure uniform tension on both from the ankle opening to the extremity of the locking threads where two lengths are guided in toe, arranged to extend through the'ankle'open-v parallel relation toward that portion of the seam ‘ ing of the shoe and» to engage the shoe sole, ‘and being led against the upper of a shoe in the a U-shaped horn carrier one arm of which is present machine, the bobbins ‘ill and ‘it are so yieldingly connected to the machine ‘frame and placed within the bobbin case that they will turn the other arm of which supports the horn for in opposite directions upon withdrawal of locking swinging movement about an ' axis passing thread, the frictional force between the bobbins 10 through the point of engagement of the-horn always acting to balance the tensions between the with the sole, the horn supporting arm of the threads without reducing it on either. carrier being of su?‘icient length to provide clear-'v The nature and scope of the invention having ance space for the heel end of ‘the largest sizedv been set forth and a speci?c embodiment of the shoe within the U of the carrier. invention having been described, what is claimed 5. A machine for sewing the upper to the sole 1s: of a shoe while unsupported on a last, havinga 1. A machine for sewing the upper to the sole work support to engage a' stitch receiving chan of a shoe while unsupported on a last, having a nel formed in the sole, a presser foot acting to relatively thin, wedge-shaped work support to clamp and release the shoe on the work support, engage'a stitch receiving channel in the sole, a 20.. and stitch forming devices including a curved presser foot to clamp and release the shoe on the needle acting ?rst to engage the upper and then work support, and stitch forming devices includ to enter and emerge from the same side of the ing a curved work piercing awl arranged to en sole, in combination with a horn extending ter first the channel in the sole and then to through the’ ankle opening of a shoe and acting emerge from the same side of the sole, and a against the inner surface of the shoe sole to press curved hook needle acting to enter the perfora the sole yieldingly into the space between the tion formed in the sole by the awl, in combina work support and presser foot, a carrier on one tion with a horn extending through the ankle end of which the horn is supported for swinging opening of the shoe and bearing against the inner movement about an axis disposed radially of the’ surface of the sole and means acting on the 30 needle path, and a bearing adjustably mounted horn to urge the sole throughout each sewing on the horn supporting end of the carrier to cycle yieldingly against the work support and enable the point of engagement of the‘ horn and toward the center of curvature of the awl and the shoe sole to be brought into line with the needle with a uniform pressure. point of operation of the stitch forming devices. 2. A machine for sewing the upper to the sole 6. A machine for sewing the upper to the sole of a shoe while unsupported on a last having, in combination, a work support to engage a stitch receiving channel in the sole, a presser foot to‘ clamp and release the shoe on the work support, stitch forming devices‘ including a‘ curved hook needle movable about an axis concentric with the curvature of the needle, and a horn extend ing through the ankle opening of the shoe and bearing against the inner surface of the sole ad jacent to the sewing point, said horn being ro tatable about an axis extending substantially through the sewing point and the axis of curva ture of the needle. 3. A machine for sewing the upper to the sole of a shoe while unsupported on a last, having a work support to engage a stitch receiving chan nel formed in the sole, a presser foot acting to clamp and release the shoe on the work support,_ and stitch forming devices including a curved needle acting ?rst to engage the upper and then to enter and emerge from the same side of the‘ sole,‘ in combination with a horn extending through the ankle opening of the shoe and acting against the inner surface of the shoe sole to press the sole yieldingly into the space between the ‘ work support and the presser foot, a carrier on the upper at the edge of the sole to clamp and which the horn is mounted for swinging move ment about an axis disposed radially of the nee dle path, and a spring actingr on the carrier to press the sole yieldingly into the space between the work support and the presser foot throughout each sewing cycle. release the shoe on the work support, and stitch 7. A machine for sewing the upper to the sole of a turn shoe while unsupported on a last, hav ing a work support to engage a stitch receiving channel in the sole, a presser foot acting against forming devices including a curved work pierc 55 of a shoe while unsupported on a last, having a ing awl arranged to enter ?rst the channel in work support to engage a stitch receiving chan the sole and then to emerge from the same side nel formed in the sole, a presser foot acting to of the sole, and a curved hook needle acting to clamp and release the shoe on the work support, enter the perforation formed in the sole by the and stitch forming devices including a curved awl, in combination with a horn extending 60 needle acting ?rst to engage the upper and then through the ankle opening of the shoe, a carrier to enter and emerge from the same side of the on which the horn is mounted for relative move sole, in combination with a horn extending ment, and a spring acting on the carrier to press through the ankle opening of the shoe and act the horn against the sole throughout each sew ing against the inner surface of the shoe sole to ing cycle toward the center of curvature of the 65 press the sole yieldingly into the space between awl and needle with a uniform pressure. the work support and the presser foot, a carrier 4. A machine for sewing the upper to the sole on which the horn is mounted for swinging move of a turn shoe while unsupported on a last, hav ment about an axis disposed radially of the nee ing a main frame, a work support on the frame dle path, a spring acting on the carrier to press to engage a stitch receiving channel formed in the sole yieldingly into the space between the the sole, a presser foot acting against the upper work support and'the presser foot throughout at the edge of the sole, and stitch forming devices each sewing cycle, and a pivotal mounting» for including a needle acting ?rst to engage the the horn carrier on the machine frame extending substantially parallel to the line of the seam be upper and then to enter and emerge from the same side of the sole, in combination with a U 75 ing inserted, about which the carrier swings to 2,410,859 11 enable the horn to move toward and from the sole. 8. A machine for sewing the upper to'thersole of a shoe while unsupported on a last, having a 12: in penetrating the work and to impart a feeding‘ movement to the work, a carrier block moving with the awl while feeding the work, and a chuck on the carrier block, in combination with a sec work support to engage a stitch receiving channel ond work support member secured adjustably in formed in the sole, a pressure foot acting to clamp said chuck for engaging the channel in the sole and release the shoe on the work support, and in advance of the point of operation of the awl stitch forming devices including a curved needle to open the channel in the sole during back feed acting ?rst to engage the upper and then to enter ing movements of the awl. and emerge from the same side of the sole, ‘in 11. A machine for sewing with a lockstitch seam combination with a horn extending through the 10 the upper to the sole of a turn shoe while unsup ankle opening of the shoe and acting against the ported on a last, having a work support to engage inner surface of the shoe sole to press the sole a stitch receiving channel formed in the sole, a yieldingly into the space between the work sup presser foot acting against the upper at the edge port and the presser foot, a carrier on which the horn is mounted for swinging movement about 15 of the sole, and stitch forming devices including a curved hook needle and a loop taker, in com an axis disposed radially of the needle path, a bination with a locking thread supply case con spring acting on the carrier to press the sole structed with a pair of outlets in a side wall yieldingly into the space between the work sup thereof and arranged to guide two lengths of port and the presser foot throughout each sewing cycle, and mechanism for actuating the carrier 20 locking thread in parallel relation against the upper at the edge of the sole. at the end of a seam to move the horn away from 12. A machine for sewing with a lockstitch seam the sole of the shoe. the upper to the sole of a turn shoe while unsup 9. A machine for sewing an upper to the sole of ported on a last, having a work support to engage a shoe while unsupported on a last, having a work support member to engage a sitch receiving 25 a stitch receiving channel formed in the sole, a presser foot acting against the upper at the edge channel in the sole, a presser foot acting to clamp of the sole, and stitch forming devices including and release the shoe on the work support, stitch a curved hook needle and a loop taker, in com forming devices including a, curved work piercing bination with a locking thread supply case and awl arranged to enter ?rst the channel in the sole in penetrating the‘ work and to impart a 30 two rotating thread packages within the thread case from which lengths of locking thread are feeding movement to the work, and a carrier block moving with the awl while feeding the work, in combination with a second work support mem ber secured to the carrier block for engaging the led, said packages being arranged to rotate in opposite directions during withdrawal of thread. 13. A lockstitch shoe sewing machine having channel in the sole in advance of the point of 35 stitch forming devices including a curved hook needle and a takeup, in combination with a lock operation of the awl, to open the channel in the ing thread supply case, a pair of reversely wound sole for the awl. thread supply bobbins supported in said case with 10. A machine forsewing an upper to the sole their adjacent end surfaces in frictional contact, of a shoe while unsupported on a last, having a work support member to engage a stitch receiving 40 and a single tension spring on the case engaging the two threads as they are‘drawn from the channel in the sole, a presser foot acting to clamp respective bobbins. and release the shoe on the work support, stitch forming devices including a curved work piercing awl arranged to enter ?rst the channel in the sole CORWIN W. BAKER.