US2197663A - Shoe sewing machine - Google Patents

Shoe sewing machine Download PDF

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Publication number
US2197663A
US2197663A US160737A US16073737A US2197663A US 2197663 A US2197663 A US 2197663A US 160737 A US160737 A US 160737A US 16073737 A US16073737 A US 16073737A US 2197663 A US2197663 A US 2197663A
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Prior art keywords
needle
lever
crank
arm
bar
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US160737A
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English (en)
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Keall Frank Bycroft
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United Shoe Machinery Corp
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United Shoe Machinery Corp
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B15/00—Machines for sewing leather goods

Definitions

  • This invention relates to sewing machines or mechanisms for use therein, and is particularly,
  • One of the: various objects of the present invention is to provide a sewing machine of novel construction for sewing together an upper and a sole of a boot or shoe by a seam as above referred to, which may be operated at comparatively high speed without excessive vibration or wear developing therein and with the'achieve.- ment of thisyobject in view there are provided in an illustrative embodiment of the present invention hereinafter described needle operating and work feed mechanisms which are constructed in such manner as to enable them to be driven at comparatively high speed without undue noise and wear of the parts.
  • a I straighthooked needle reciprocating mechanism which is operated by 'a crank and by a plurality of links and levers which are. so relatively arranged as to allow the needle to move at a comparatively high speed at certain times in a machine cycle and yet to allow the needle to dwell at the top of its stroke while the work is being fed and at the bottom of its stroke while the thread is being placedin the hook of the needle.
  • the work feeding mechanism is operated by ,a crank and a plurality of links and levers arranged vto operate the feed device of the machine at a relatively high speed and yet to provide a dwell in the movement of the feed device while.
  • FIG. 4 is a section on the line IV.IV in Figure 3;
  • Figure 5 is a right hand side elevation,
  • Figure 6 is a section on the line VL VI in Figure 2;
  • Figure 7 is a detail view infront elevation of part of the work feedmechanism;
  • Figure 8 is a section on the line VIlIVIII in Figure 2;
  • Figure 9 is a, front elevation showing some of the parts of the needle actuating mechanismof the illustrative embodiment in the relative positions they occupy when the needle is at the bottom of its movement.
  • a vertical needle-bar I is reciprocated upwardly and downwardly by mechanism connecting the needle-bar I ma crank pin 3 on a horizontal forwardly and 'rearwardly extending cam shaft 5 of the machine.
  • the needle bar I has secured on its forward side a pin 7, as shown in Figures 2 and 9.
  • Rotatably mounted on the pin 1 is a bell-crank lever 9. extends upwardly from-the pivot 'lof the lever and this arm is aboutjtwice as long as the other arm l3 of the bell-crank lever which latter arm extends to the left from the pivot? of the bellcrank lever more or less perpendicularly to the longer arm II.
  • the shorter arm it of the bellcrank lever is connected by a radius link iii to a needle adjusting shaft ll 'rotatably mounted in bearings on the machine frame.
  • the arm ll of the bell-crank lever 9 is pivotally connected at its upper end by a pin Hi to the lower end of an arm 2l pivotally mountedon a spindle 23 secured in the machine frame.
  • has pivotally, connected to it at '24,, one end of a link 25 which at its lower end is pivotally connected at 26 to the upper end of a curved arm 21..
  • The-lower end portioniof the curved arm 21 is pivoted at its lower end on a.
  • the shaft 29 carried by a needle adjusting arm 3
  • the curved arm Zl has pivoted to it by a pin 33 one end of a link 35, the other end of which is pivotally connected to the crank pin 3 on the cam shaft 5.
  • the curved arm 21 is swung, by its connection to the crank pin 3, about its pivot shaft 29 in the needle adjusting arm 3L
  • the swinging movement of the curved arm 21 causes, through the link- 25 connecting the curved arm and the arm ZI to which the longer arm H ofithe aforesaidbell-crank lever9 is connected, up and down oscillating movements to the latter arm Zhwhich arm imparts bodily up and down movements and an One arm I l of the bell-crank lever 9 oscillating movement about its pivot pin I on the needle-bar to the bell-crank lever 9.
  • the up and down movements of the bell-crank lever 9 are transmitted to the needle-bar I by the pin I on the needle bar on which the bell-crank lever 9 is pivoted.
  • the actual up and down"movements of the axis of. the bell-crank lever 9 are controlled partly by the arm 2
  • the relative lengths and angular dispositions of the parts are such that when the needle-bar is at the top of its upward movement the axes of the cam shaft 5, the' crank pin 3 on the cam shaft and the pivot 33 connecting the link 35 to the curved arm 21 are lying substantially on a line extending upwardly and towards the left from the axis of the cam shaft 5'at an angle of about thirty degrees to the horizontal.
  • the crank pin When the crank pin is in this line, it may be said to be on a'dead center and as the crank pin 3 approaches and leaves this line it imparts little or no movement to the needle bar I, since little or no endwise movement is then imparted to the link 35, which actually dwells at the top of its upward movement during about degrees of rotation of the cam shaft 5.
  • the axis of the shaft 29 on which the curved arm 21 is pivoted and the axes of pivotal connections 26' and 25 all lie substantially on a line passing upwardly and towards the right, at the left hand side of the cam shaft,'at an angle of some sixty degrees to the horizontal and as the needle bar approaches and leaves its uppermost position the axis of the pivotal connection 26 between the curved arm 2'! and link 25 moves across this line.
  • I! lie substantially on a line extending, just below the cam shaft, at about twenty degrees to the horizontal downwardly and towards the right with resultthat the needle bar dwells at the bottom of its'downward movement and this dwell continues during about 90 degrees of rotation of the cam shaft 5.
  • the fact that the needlebar dwells for so long a period at the bottom of its stroke provides ample opportunity for the thread to be laid in the hook of the needle by a whirl of usual type enclosed within the upper end. of a work-supporting horn 36.
  • the position heightwise of the needle bar relatively to the work supporting horn 35 of the machine, when the needle bar is at the top of its upward movement, is determined by the height- Wise position of a presser bar 31, similar to that referred to' as 5
  • is swung in a clockwise direction by a'cam arm 39 'pivotally mounted on and depending from the needle adjusting shaft l1 and connected to the arm 3
  • the cam" arm 39 has formed on its right hand side a curved face 4
  • of the presser bar lever 4! is connected to the presser bar 31 by a member 53 pivoted at 55 to the arm 5
  • the member 53 has threaded in it two screws 59 which engage the arm 5
  • the needle at the top of its stroke is controlled by the heightwise position of the presser, adjustment of the presser bar by means of the screws 59 varies theheightwise position of the needle bar at the top of its stroke relatively to the work.
  • the presser bar 31 is urged down-'- wardly by a spring (not shown) coiled round the presser bar lever shaft'49.
  • the aforesaid cam arm 39 is connected to the needle adjusting arm 3
  • which has formed in it a slot 63.
  • the right hand end of the slot 63 normally engages a pin 65 secured .in the arm d5 of the presser bar lever 41.
  • has threaded into it a screw 61 which projects into the slot'63 and extends lengthwise thereof.
  • ensures that, after the presser bar lever 41 and needle adjusting arm 3
  • the needle bar When the presser bar is raised during the operation of the machine to allow the work to be fed, the needle bar is approaching the top of its upward movement and unless means are provided to prevent the needle bar from being given a small upward movement by the lifting of the presser bar the needle bar will be given an unnecessary and undesirable upward movement during each cycle of the machine.
  • means is provided which allows the needle bar to be lifted when the presser bar 31 is raised by the treadle operated means but prevents the needle bar I from being lifted when the presser bar 3'! is raised during the operation of the machine to allow the Work to be fed.
  • the said means comprises a connection between the aforesaid cam arm 39 and the aforesaid needle adjusting arm 3
  • the treadle is raised by the treadle to cause the cam arm 39 and needle adjusting arm 3
  • is caused to collapse with the result that the cam arm 38 moves relatively to the needle adjusting arm 3
  • the lower end of the arm 15 is secured to the forward part of a rearwardly and upwardly inclined shaft 19 positioned below theneedle adjusting shaft H.
  • the inclined shaft 19 has rotatably mounted on its forward end a'rectangular block 8
  • the forward end of the inclined shaft '19 is supported by the short arm l5 ( Figure 5) secured on the forward part of the shaft.
  • the rear portion of the inclined shaft 19 is rotatably mounted in the lower "end of an arm 85 secured on and depending from the needle ad it a cam roll 95 which enters a cam groove in a a Y cam, indicated at 3i, secured on the cam shaft 5;
  • the presser cam lever 93 as described in said patent, is coupled during each cycle of the machine, to the presser bar and is operated to cause the presser bar to be raised during each cycle while the work is being fed.
  • the presser cam lever 93 is so positioned byv its cam that the axis of the universal coupling cohnecting the link 9
  • the needle adjusting shaft-l1 has secured to it an arm 99 which extends from the needle adjusting shaft over the cam shaft in towards the right hand sideof the machine and which has pivoted to its right hand end by pin H a link Hi3 which extends downwardly from the arm and is pivotally connected at its lower end to the upper end of a vertical ratchet bar I05 slidingly mounted in the machine frame.
  • the ratchet bar I95 on its rear face has formed on it a series of ratchet teeth I01 which are engaged by the upper end of a pawl I39 pivoted between its ends on a horizontal stud III secured in the machine frame.
  • the lower end of the pawl I09 has pivotally connected to it the forward end of a link II3 which, at its rear end, is pivotally connected to a cam lever I I5 (similar to the lever referred to as 91 in said patent) which as described in said specification causes the.
  • presser bar 31 to be connected to its lifting cam lever 93 during the operation of the machine.
  • cam lever I I 5 is moved by its cam, indicated at II1 Figure 5, on the cam shaft 5 in a direction to cause the presser bar 31 to be connected to its lifting cam lever 93 prior to the raising of the presser bar
  • the pawl IE9 is moved into engagement with one of the ratchet teeth I I11.
  • the ratchet bar I05 has secured in its right hand side a horizontal pin II9 which is engaged by a substantially horizontal recess IZI formed in the rear end of a substantially horizontal lever I23 pivoted on a horizontal stud I25 secured in the machine frame.
  • the forward end of the Y lever I23 is rounded and enters a recess formed in the right hand side of a vertical plate I21 ( Figures l and 2) at the front of the presser bar 31.
  • the vertical plate I 21 is guided vertically by a stud I29 (corresponding to the screw-pin referred to as 56 in said patent) secured in the machine frame and passing through a vertical slot I3I in the upper end of the plate and a stud I33 ( Figure 6) secured in the presser bar which passes through another vertical slot I35 in the plate near its lower end.
  • the vertical plate I21 has rotatably mounted in it, near its lower end a horizontal extending pin I31.
  • the pin I31 extends rearwardly from the plate and passes through a vertical slot I39 in the presser bar 31.
  • the pin I31 has secured at its rear end a rectangular block I II ( Figures 2 and '1) which enters an inclined guideway I43, extending downwardly towards the left, formed in a feed point carrier I 45.
  • the feed point carrier I lies just behind the presser bar 31 and is guided by the rectangular block I4I and by a pin I41 extending rearwardly from the presser bar 31 which is engaged by an open ended slot I .49 in the upper end of the feed point carrier I45.
  • a depending feed point arm I53 Freely pivoted on the lower end of the feed point carrier, on a pin I5I, is a depending feed point arm I53 in the lower end of which a feed point I55 is secured, the relative positions of the feed point I55 and the presser bar 31 being similar to those indicated in the patent aforementioned.
  • the feed point arm I 53 is normally drawn towards the right into contact with the presser foot 69 by a tension spring I51 connected at one end to the feed point arm I53 and at the other end to the presser bar 31.
  • the feed point arm I53 has secured in it between its pivot and its feed point a rearwardly extending pin I59, to which one end of the spring I51 is connected, and the feed point carrier I45 has formed in its left hand side near its lower end a recess I5I arranged, during movement of the feed point carrier I45 in the direction of work feed, to engage the pin I59.
  • the lower end of the feed point carrier I45 is moved towards the left, by mechanism hereinafter described, in a direction to feed the work, the lower end of the feed point carrier is guided downwardly and towards the left by the aforesaid block MI in the inclined guideway I43 in the feed point carrier I45.
  • the feed point arm I53 is held by the aforementioned spring I51 against the presser foot 69 and the feed point descends more or less vertically into the work.
  • the recess I6I in the feed point carrier I45 engages the pin I59 in the feed point arm I53
  • the feed point arm I53 and feed point I55 then engaging in the work move with the feed point carrier I45 and the feed point feeds the work, the feed point carrier I45 being guided by the block I4! on the vertical plate and the aforesaid pin I41 on the presser bar 31.
  • the block MI and the pin I41 are so relatively arranged that when the feed pointv I55 is feeding the work its lower end moves substantially horizontally towards the left.
  • the ratchet bar IE5 is, as hereinbefore described, secured on the aforesaid needle adjusting shaft I1, the needle shaft is prevented from being rotatedin a clockwise direction and the needle-bar is therefore prevented, by the pawl and ratchet teeth, from being raised by the lifting of the presser bar which takes place to allow the work to be fed by the feed point.
  • the pawl I09 preferably engages the ratchet teeth I91 during the greater part of the machine cycle, being released therefrom after the work is fed only about long enough to allow the needle mechanism to accommodate itself to the heightwise position of the presser after the latter has been allowed to descend on to the work after the work has been fed.
  • the pawl and ratchet teeth therefore prevent any tendency there may be to overthrow during the movement of the needlebar, at other times in the machine cycle, due to the. momentum of the parts.
  • the aforesaid mechanism for moving the feed point carrier I45 towards the left to feed the work comprises a crank and a plurality of links and levers the shafts and pivot pins of which all extend horizontally forwardly and rearwardly of the machine and the mechanism.
  • the bellcrank lever I13 has an upwardly extending arm I8!
  • the bell-crank lever I19 is p iyoteg 3) which extends towards the rightfromthe hub of the lever.
  • the arm I89 of the bell-crank lever I19 has pivoted to its right hand end one end of a link I9I which extends upwardly and towards the right and at its upper end is pivotally connected to one end of a. feed adjusting lever I93.
  • the feed adjusting leverI93. extendsupwardly and to the left from its connection to the link IBI and at its left hand end is pivoted on a crank pin. I95 which maybe adjusted to alter the position in the-machine of the left hand end of the feed adjusting lever I93 and may be locked in its adjusted position so that the crank pin' I95 provides a fixed but adjustable pivot for, the left hand endof the feed adjusting lever I95.
  • Thecrank pin I95. extends. forwardly from an arm I96 secured on a crank shaft I91, rotatablyv mounted in the machine frame, which is angularly adjustable to vary the position of the crank pin I95 in the machine frame.
  • the crank shaft I91 has secured on its rear endan arm I99 ( Figure 4) by which the crank shaft may be rotated.
  • the arm I99 extends towards the right 'handside of the machine and its right hand end carries a clamping device by which the arm may-be clamped in adjusted position to a plate 2M secured on the machine frame.
  • the clamping device comprises a-bolt 203 extending through the arm I99 and through a block 205. of it a head 201 which engages the'block 205 and on its other and threaded end a hand nut 209 by means of which'the block 205 andarm I99 may be clamped against the plate 2III.
  • the hand nut 209- may be used to swing the arm I99 and crank pin I95 upwardly or downwardly.
  • the feed adjusti'n'g lever I93 is pivot ally connectedat ZII, between its ends, to one end of a link 2 I3 which extends downwardly and to the left from the feed adjusting lever and at its other end is pivotally connected, at 2I5, to a depending arm of a'bell-crank lever, 2 I1 which is secured on a shaft 2I9.” rotatably mounted in the machine frame.
  • the other arm of the bell-crank lever 2 I1 extends upwardly andto the left from the hub of the lever and has'pivotally connected to its upper end, at22I, one end of a link 223' the other end of which is pivotally connected,. at 225, to the right hand end of a crank lever 221.
  • the left 1 hand end of the crank lever 221 is pivoted on a crank 229 on" the'cam shaft and between its endsthe crank lever is pivotally connected at '23 I,
  • a radius arm 233 which serves to, control the direction of movement of the right hand end of the crank lever 221 as the cam shaft rotates.
  • the radius arm 221 is secured at its lower end on a shaft 235 which is rotatably mounted in the machine frame below and just to theright of the cam shaft. As thecam shaft 5 rotates the right hand end of the crank.
  • lever 221i is caused, by the crank 229 and radius arm 233', to move in more or less elliptical path,'indicated by thedot-and-dash line 231 Figure 3, one side or which is during the movement of the right hand end of the crank lever 221 along it concentric to the pivot 22I connecting the link 223-,to-the bell-crank lever ZITa-nd therefore during this part vof the movement of the right hand end of thecranklever .221 no endwise movement is imparted to the link 223 and no feed movement is imparted to the feed point through the crank lever 221, the feed point dwelling,v after it has hecome nsbdde the w r lth ush, Che
  • the bolt has on one end ing of the bell-crank lever I13 both while the needle is piercing the work and while it is moving upwardly witha loop of thread in its hook.
  • the crank lever 221 When the right hand end of the crank lever 221 is moving'along the opposite side of its elliptical path 231 it imparts appreciable endwise movements to the link 223 connected to it and feeding and return movements are, during, this part of the movement of the crank lever 221', given to the feed point.
  • the feed adjusting lever. I93 is pivoted, is adjusted in such a manner as to move the pivot iii 5 connecting the feed adjusting lever I93 and the link 2 i3 nearer to or further away from the the amount of movement imparted tothe feed point.
  • the dot and dash line a in Figure B indicates the'path of movement of the axis of the pivot H I I when the crank pin I95 is adjusted, in a counterclockwise direction, to reduce the length of feed ing movement of the work.
  • the line b indicates the position of the axis of the pivot 2 at the end of the different lengths of feeding. Movement of the feed point and the lines o of different length indicate the distances the axis moves dur ing different lengths of 'feeding movement of the feedpoint'.
  • the cam I85 on the cam shaft 5 which actuates the bell-crank lever I13 causes the feed point I55, after the work has been fed and the feed point has been returned towards the right, tobe moved downwardly intoengagementwith the work and to be held there during the aforementione'd' dwell of the feed'point.
  • the bell-crank lever I13 iscarried bodily towards the left' by the swinging movement of the bell-crank lever I1 9 and the cam roll I83 on the bellcrank lever I13 moving idly under its cam.
  • the feed point is reaching the end of its return movement towards the right, during which it tra-ils along on the work and is being thus'moved by thev crank 229 and link mechanism while the cam roll I 83on the bell-crank lever I13 moves to the right with thebell-crank lever I19 idly beneath raised is effected by the conjoint action of the crank 229 and the cam I85 which act simultaneously to movethe feed point carrier I45 towards the-right.
  • the mechanism operated by the crank 229 dwells as aforesaid and the cam I85 moves the feed point carrier sufficientlyfar towards the left to cause the feed point to move downwardly into engagement with the work in readiness again to feed the work.
  • the cam operated mechanism and the bell-crank lever I13 then dwell while the needle passes through the work and rises therefrom with a loop of thread in its hook.
  • a sewing machine provided with the mechanisms hereinbefore described for actuating and.
  • crank pin I95 on which controlling the needle bar and workfeed point 7 is capable of being operated at comparatively high speed without undue noise or vibration, the raising of the presser foot independently of the feed point ensuring that the feed point firmly engages with the work and feeds the work the full distance through which the feed point moves during its feeding movement.
  • a cast-off mechanism is provided which is substantially similar to the cast-off mechanism described in Patent Nb. 1,713,186 to Bernard T. Leveque dated May 14, 1929, and operates in a similar manner.
  • the cast-off 24! is mounted to slide in a vertical groove in the right hand side of the needle bar I and is secured at its upper end in a collar 263 mounted to slide vertically on the needle bar between blocks 245, 24'! secured on the needle bar I above and below the collar 243.
  • the collar 253 has secured in it a forwardly extending pin on which is rotatably mounted a roll 249 which as the needle bar moves up and down passes between the upper inwardly inclined ends of a pair of levers 25!, 253 similar to the levers referred to as 12, 14 in the latter specification which are normally urged towards each other by a spring 255 similar to the spring referred-to as 76 in said specification.
  • the levers 25!, 253 are pivoted on a block 25'! which is pivotedon a horizontal forwardly and rearwardly extending stud 259 secured in a bracket 26! which is fixed to the machine frame.
  • the stud 259 is positioned a little below and centrally between the pivots 263, 265 of the levers25l, 253.
  • the block 25'! has extending to the left from it an arm 25'! on which is secured a blade spring 269 which extends towards the left from the block and its left hand end extends between two pins 21!, one above and the.
  • the spring 255 is arranged to normally hold the levers in a central position with respect to the needle bar.
  • the pivotal mounting of the block 25'! on which the levers 25!, 253 are pivoted and the blade spring 269 allow the levers to rock bodily to the right or left of the needle bar should it, during its upward or downward movement, be turned about its axis and thus enables the roll 249 on the collar 243 to bear equally uponv the inclined upper faces of the levers.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a rotating crank, lever and link connections between thev crank and needle for 1 actuating the needle from the crank.
  • a support upon which one of the levers is mounted movable to varyithe stroke of the needle, a presser foot, connections between the support and the presser foot for adjusting the support for different thicknesses of work, mechanism for lifting the presser foot during each stitch forming cycle, and means actuated by said mechanism for rendering the connections between the presser foot and said support inoperative to move the support as the presser foot is lifted by said mechanism.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a rotating crank, lever and 'link connections between the crank and needle for actuating theneedle from the crank, a'support upon which one of the levers is mounted movable to vary'the stroke of the needle, a presser foot, connections between the support and the presser foot for adjusting the support for different thicknesses of work, mechanism for lifting the presser foot during each stitch forming cycle, and means for preventing movement of said support by the presser foot as the presser foot is lifted by said mechanism.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a rotating crank, lever and link connections between the crank and needle for actuating the needle from the crank, a support upon which one of the levers is mounted movableto vary the stroke of the needle, a presser foot, connections between the support and the presser foot for adjusting the support for different thicknesses of work, and for moving the support to.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a rotating crank, lever and link connections between the crank and needle for actuating the needle from the crank, a support, upon which one of the levers is mounted movable to vary the stroke of the needle, a needle adjusting shaft to which the support is secured, an actuating arm pivotally mounted on the needle adjusting shaft, an arm rigidly mounted on the shaft, a rotatable shaft supported in the rigidly mounted arm, and in the support, an arm rigid with the rotatable shaft and pivotally connected with the actuating arm, a presser foot, connections from the presser foot for moving the actuating arm to adjust the needle adjusting shaft and support for dififerent thicknesses of work, mechanism for lifting the presser foot during each stitch forming cycle, and means actuated by which one of the levers is mounted movable to vary the stroke of the needle, a presser foot, and connections between the support and the presser foot for adjusting the support for different thicknesses
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a rotatingcrank, lever and link connections between the crankand needle for actuating'the needle from the crank, a support upon which one of the levers is mounted movable to vary the strokeof the needle, a presser foot, and connections between the support and the presser foot for adjusting the support for different thicknesses of work comprising a presser foot bar, a
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a single rotating crank, and connections between the crank and needle for actuating the needle comprising levers and links arranged to form two toggles, one of which is substantially' straight when the needle is at the top of its stroke'and while the crank is passing overone dead center, and the other of which is substantially straight when the needle is at the bottom of its stroke and the crank is passing over the other dead center.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a rotating crank, and connections between the crank and needle for actuating the needle comprising a lever, a link connecting the crank and lever, a bell crank, a link connecting the lever and bell crank and forming a toggle with the lever, and a link connecting the bell crank to the needle and forming a toggle with the bell crank, the first mentioned toggle being straightened when the needle is at the top of its stroke, and while the crank is passing over one dead center and the other toggle being straightened when the needle is at the bottom of its stroke and while the crank is passing over the other dead center.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to pierce and withdraw from the work, a presser foot, a feed point carrier movable back and forth in the line of feed, a feed point pivotally mounted on the carrier and arranged to slideon the presser foot into engagement with the work at the beginning of the forward movement of the carrier and out of engagement with the work at the end of the backword movement of the carrier, and a support forthe feed point carrier separate from the presser foot arranged to permit the presser foot to be lifted without lifting the carrier.
  • a shoe sewing machine having, in combination, stitch forming devices, a straight hook needle, a horn arranged toextend within the shoe, means for actuating the needle to pierce and withdraw from the work, a presser foot, a feed point carrier movable back and forth in the line of feed, a feed point pivotally mounted on the carrier and arranged to slide on the presser foot into engagement with the work at the beginning of the forward movement of the carrier and out of engagement with the work at the end of the backward movement of the carrier, and means for supporting the feed point carrier while permitting a lifting movement of the presser foot without lifting the carrier.
  • a shoe sewing machine having, in combina tion, stitch forming devices, a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to pierce and-withdraw from the work, a presser foot, a feed point carrier movable back and forth in the line of feed, a feed point pivotally mounted on the carrier and arranged to slide on the presser foot into engagement with the work at the beginning of the forward movement of the carrier and out of engagement with the work at the end of the backward movement of the carrier, mechanism for actuating the feed point carrier and presser foot arranged to cause the feed point to enter the work before the presser foot is raised and to raise the presser foot while the feed point is engaged with the work without raising the feed point carrier.
  • 'A shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to pierce and withdrawfrom the Work, a presser foot, 2. feed point carrier movable back and forth in the line of feed, a feed point mounted on the carrier, means comprising a cam for actuating the feed point carrier to cause the feed point. to engage the work, and means comprising a crank for actuating thefeed point carrier to cause the feed point to. feed the Work.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a horn arrange-d to extend within the shoe, means for actuating the needle to pierce and withdraw from the work, a presserfoot, a feed'point carrier movable back and forth in the line of feed, a feed point mounted on the carrier, and means for actuating the feed, point carrier comprising a radius arm, a crank actuated lever pivoted on the radius arm, a crank engaging one end of the lever, a link pivotally connected to the other end of the lever, and an actuating lever to which the link is connected, sai-dparts being arranged to cause a to-and-fro oscillation of the actuating lever during a portion of the crank rotation, and during the remainder of the crank rotation to. maintain the actuating lever stationary.
  • a shoe sewing machine having, in combination,- stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to piece and withdraw from the work, a presser-foot, a feed point carrier movable back and forth in the line of feed, a feed point mounted on the carrier, and means for actuating the feed point carrier comprising a radius arm, a crank actuated lever pivoted on the radius arm, a crank engaging one end of the lever, a link pivotally connected to the other end of the lever, and an acment of the feed point carrier.
  • Ashoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a hornarranged to extend within the shoe, means for actuating the needle to pierce and-withdraw from the work, a presser foot, a feed point carrier movable back and forth in the line of feed, a feed point mounted on the carrier,
  • actuating the feed point carrier comprising a radius arm, a crank actuated lever pivoted on the radius arm, .a crank-engaging one end of the lever, a link pivotally connected to the other end of the lever, and an actuating lever to which the link is connected, said parts being arranged to cause the pivot connecting the crank actuatedlever and the link during a portion of the crank rotation to be moved back and forth across the line joining the pivot of the crank actuated lever, and the pivot connecting the link with the actuating lever in a path to impart a to-and-fro oscillation to the actuating lever and during another portion of the crank rotation to be moved in a path concentric to said last mentioned pivot to maintain the actuating lever stationary.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to pierce and withdraw from the Work, a presser foot, a feed point carrier'movable back and forth in the line of feed, a feed point mounted on the carrier, and means for actuating the feed point carrier comprising a pivotally mounted feed adjusting lever, connections from said lever to the feed point carrier, an actuating lever, a link connecting said levers, and means for adjusting the pivot of the feed adjusting lever to change the relative position of the link and actuating lever.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to pierce and withdraw from the work, a presser foot, a feed point carrier movable back and forth in the line of feed, a feed point mounted on the carrier, a lever, connections from the lever to the feed point carrier, a support on which the lever is mounted, a cam for actuating the lever to cause the feed point to engage the work, and a crank and connections for actuating the support with the lever to cause the feed point to feed the work.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to pierce and withdraw from the work, a presser foot, a feed point carrier movable back and forth in the line of feed, a feed point mounted on the carrier, and means for actuating the feed point carrier comprising an actuating lever, a crank, a link pivoted at one end to the lever, and connections between the crank and the link arranged to cause the other end of the link, during a portion of the crank rotation, to be moved back and forth in a path concentric with the pivotal connection of the link with the actuating lever, and during another portion of the crank rotation to be moved back and forth in a path to impart a to-and-fro oscillation to the actuating lever.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to pierce and Withdraw from the work, apresser foot, a feed point carrier movable back and forth in the line of feed, a feed point mounted on the carrier, a presser foot bar, a support for the feed point carrier mounted to slide on the presser foot bar towards and from the horn, connections between the presser foot and the support for regulating the position of the Support with relation to the horn, and means for preventing movement of the support when the presser foot bar is moved away from the horn to allow the work to be fed.
  • stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, means for actuating the needle to pierce and Withdraw from the work, apresser foot, a feed point carrier movable back and forth in the line of feed, a feed point mounted on the carrier, a presser foot bar, a support for the
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a horn arranged to extend within the shoe, a rotating crank, lever and link connections between the crank and needle for actuating the needle from the crank, a'support upon which one of the leversis mounted movable to vary the stroke of the needle, a presser-foot, connections between the support and the presserfoot for adjusting the support for different thicknesses of work, a presser foot bar, a feed point carrier movable back and forth in the line of. feed, a feed point mounted on the carrier, a support for the feed point carrier mounted to slide on the presser-foot bar towards and from the horn, and connections between said supports for regulating the position of the feed point car rier support with relation to the horn.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a rotating crank, lever and link connections between the crank and needle for actuating the needle from the crank, a support upon which one of the levers is mounted movable to vary the stroke of the needle, 2. presser foot, connections between the support and the presser foot for adjustably limiting the movement of the support in one direction to adjust the support for different thicknesses of work, and means acting during a portion of each stitch forming cycle to lock the support against movement in the opposite direction.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a rotating crank, lever and link connections between the crank and needle for actuating the needle from the crank, a support upon which one of the levers is mounted movable to vary the stroke of the needle, a needle adjusting shaft to which the support is secured, a presser foot, connections between the-shaft and the presser foot for adjustably limiting the rotation of the shaft in one direction, afbar connected to the shaft, and cam actuated means for locking the bar against movement during a portion of each stitch forming cycle to limit the rotation of the shaft in the opposite direction.
  • stitch forming devices including a straight hook needle, a rotating crank, lever and link connections between the crank and needle for actuating the needle from the crank, a support upon which one of the levers is mounted movable to vary the stroke of the needle, a needle adjusting shaft to which the support is secured, a presser foot, connections between the-shaft and the presser foot for adjustably limiting the rotation of the shaft
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a cast-01f movable with the needle and'having a limited independent movement, a pin connected to the cast-off, yielding members connected to move inunison towards and from each other between which the pin passes during the needle movement and by which the cast-off is moved with relation to the needle, and a block upon which said members are mounted, said block being mounted for yielding movement transversely of the needle movement to cause the pin to bear equally upon said members.
  • a shoe sewing machine having, in combination, stitch forming devices including a straight hook needle, a cast-off movable with the needle and having a limited independent movement, a pin connected to the cast-off, yielding members between which the pin passes during the needle movement and by which the cast-ofi" is moved with relation to the needle, a pivotally mounted block upon which said members are mounted,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US160737A 1936-09-11 1937-08-25 Shoe sewing machine Expired - Lifetime US2197663A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24757/36A GB481564A (en) 1936-09-11 1936-09-11 Improvements in or relating to sewing machines or mechanisms suitable for use therein

Publications (1)

Publication Number Publication Date
US2197663A true US2197663A (en) 1940-04-16

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Application Number Title Priority Date Filing Date
US160737A Expired - Lifetime US2197663A (en) 1936-09-11 1937-08-25 Shoe sewing machine

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US (1) US2197663A (fr)
DE (1) DE708649C (fr)
FR (1) FR826505A (fr)
GB (1) GB481564A (fr)

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DE708649C (de) 1941-07-26
GB481564A (en) 1938-03-11
FR826505A (fr) 1938-04-01

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