US2002136A - Shoe sewing machine - Google Patents

Shoe sewing machine Download PDF

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Publication number
US2002136A
US2002136A US689097A US68909733A US2002136A US 2002136 A US2002136 A US 2002136A US 689097 A US689097 A US 689097A US 68909733 A US68909733 A US 68909733A US 2002136 A US2002136 A US 2002136A
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Prior art keywords
shoe
cam
gripper
sewing
machine
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US689097A
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English (en)
Inventor
Bates Arthur
Choice Frank Coleman
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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
    • D05B15/02—Shoe sewing machines
    • D05B15/04—Shoe sewing machines for lock-stitch work

Definitions

  • This invention is concerned 7 .with improvetual y able to grip t e upp in thiS locality ments in or relating to shoe sewing machines-and if the marginal portion of the upper is sufiihas particular reference to inseam sewing maciently upstanding in this locality to enable the .chmes such as are used in the manufacture of gripper .to seize it) there arises a danger that welted shoes or turn shoes. 7 the heightwisetension away from the insole ex- V 5 In the application for United States Patent erted oncthe upper byihe pp may lift the Serial No.
  • a simisole on the last bottom, the said gripper moving, lar danger ex sts wh the Combined Sewing and a it eXert$ its p ll on a marginal portion of lasting operation is drawing to a conclusion 15 the upper, towards the needle from a position a ong the opposite side of the shoe close to the spaced to one side thereof in order that the porh i r h t tion of the upper which it grips shall be sewn
  • the ie sl the Present invention are to to the insole lip while it is actually held under improve t e con n and Operation f the tension close to the needle by the gripper and to gripper deviee d sclos the Prior application 20 assist a channel guide of the machine to feed n a; manner to v o e the above and other the work step by step through the machine, disadvantages and to render the gripper device
  • the gripper device disclosed in said prior apmore compact and mo e d y adjustableplication has been
  • gripper similar to that disclosed in the said prior
  • the mechanismdisclosed in the said application has its upper tensioning movements prior application for-imparting to the gripper impartedto it'through a short swinging lever its upper-pulling movements was found to be which is coupled to an eccentric which also serves somewhat cumbersome and the mechanism for to actuate a ratchet and cam device by which the 30 opening and closing the gripper jaws was found gripperl is rendered inoperative while working not to offer convenient adjustment for regulataround the toe end of a shoe and is also prevented ing the extent to which the gripper Jaws opened from moving from an inoperative position into and closed in accordance with the thickness of upper-seizing "positionlwhen. the inseam sewing the upper materials of diflerent shoes.
  • the sewing operation cam device is adjustable so that the precise time commences on a shoe and if th gr pper is acat which the gripper is allowed to come into operation on the upper when starting sewing may be varied to suit varying conditions in the work. Further in the same illustrative embodiment means are provided whereby the operator can accurately re-position (i. e. re-time) the said ratchet and cam device to cause the gripper to be lifted out of operative position at the correct time if he has to repeat the sewing operation along a part of the shoe, due for example to a thread breakage after starting sewing and before the toe end is reached.
  • Figure 1 is a right hand side elevationof the head of the illustrative embodiment
  • Figure 2 is a right hand side elevation of tain parts seen in Figure 1.
  • Figure 3 is a front elevation showing part of certhe head
  • Figure 4 is a right hand side elevation of certain parts seen in Figure 1; V
  • Figure 5 is a right hand side elevation, on an enlarged scale of certain parts of the illustrative embodiment.
  • Figure 6 is an isometric View of certain parts seen in Figure 5. h
  • the machine comprises a curved hooked needle I', a loop'er 3, ( Figure 3) atake up 5 and other instrumentalities which co-operate in a well known manner to form the stitches of a chain-stitch seam and is further provided, as is thelmachine disclosed in the application aforementioned, with a" lasting gripper indicated generally at 1 (similar in construction and function to that described in that specification) which is adaptedto operate in time relation to the sewing instrumentalities'to last side portions of a shoe upper before the said portions of the upper and welt are sewn by the machine to the insole.
  • the lasting gripper is positioned to the right of the needle, looking at the machine from the front as shown in Figure3 and is supported at its upper end in aball joint in theforward end of an updraw lever 9 which is pivoted on a horizontal and laterally extending stud secured on a fixed portion of the machine frame and which is curved laterally between its pivot H and its forward end towards the needle position to allow the jaws l3, l5 at the lower end of the gripper to lie closer to the sewing point than they otherwise would.
  • the jaws 'of the gripper are likewise curved towards the needle, looking at the machine from the front, for a similar purpose.
  • Theupdraw lever B of the present illustrative embodiment is considerably shorter than that referred to in Patent No. 1,966379' and the means for imparting to it its falling and rising movements to cause the gripper to descend towards and to rise away from the shoe are somewhat different from those described for operating the updraw lever referred to in that specification.
  • the rear end of the updraw lever 9 of the present illustrative embodiment has freely pivoted in it a horizontal pin ll which has secured upon its right hand end close against the right hand side of the lever S a short downwardly and rearwardly extending sleeve I9.
  • passes through the said sleeve it its upper end having pinned to it just above the said sleeve a hand nut 23 by which the rod may be rotated.
  • the down- 7 wardly and rearwardly extending sleeve 9 has a second and rotatable sleeve member 25 threaded "onto its lower end through which the updraw rod 2
  • and the eccentric 35 on the main shaft is such that although the cocentric can rock the bifurcated lever rearwardly positively a given amount to impart the desired updraw movement to the gripper, the bifurcated lever can be rocked still further by means hereinafter described to cause the gripper to rise to and be maintained in a higher inoperative position in spite of the action of the eccentric.
  • the eccentric strap: 39 of the said eccentric has a pair of parallel bores 4
  • a second short rod 55 is threaded in the second bore 53 in the boss "65 and passes outwardly through a downwardly projecting lug 51 formed on the socket 5
  • a spring 59 is located between a collar 6
  • comprises a transversely extending pin 63 extending through the lower end of the coupling member, the opposite ends of which pin extend through slots 65 in the bifurcated members of the bifurcated lever 3! which lie on opposite sides of the said coupling member.
  • a spring-pressed striker or abutment 68 ( Figure 4) together with a threaded sleeve nut 69 for varyingthe compression of a.
  • spring II- housed between a shoulder on the striker 68 and the lower end of the nut 69 are housed in an upwardly extending threaded sleeve 73 whichisthreaded into the forward end-of a gripper closing lever I5 and which may be rotated to adjust the heightwise position of'the lower. face of the striker' 68 with whichthe upper end of the jaw-closing rod or plunger 'i'i -is maintained incontact by springs I9.
  • the heightwise position of the strikerfifi and therefore varying the heightwise position of thejaw-closi'ng plunger 17, the extent to which the gripper jaws are allowed to open when the striker rises and the extent to which they are closedwhen the striker descends may be varied to suit different thicknesses of'upper materials.
  • The'jaw-closing' plunger 11 is connected to the gripper jaws their closing movements ina manner similar tothat described with reference to the lever referred to as I54 in the prior patent.
  • a manually adjustable connection is provided 'in the present illustrative embodiment between the gripper closing lever 15 and the said cam-actuated lever 8'!
  • connection between the rear end of the gripper closing lever and the said cam-actuated lever comprises a toggle having two short links 89 and 9
  • the upper end of the link 89 is pivotally connected to the rear end of the gripper closing lever and the lower end of the link 9
  • a rearwardly extending spring as is connected to the link 9
  • ratchet wheel I83 side of the ratchet wheel I83.
  • extending arm of the lever I07 has also secured vided for automatically lifting the gripper to and retain it in such an elevated position when sewing around the toe end of a shoe that the gripper cannot engage the upper materials around this portion.
  • Thesaid ratchet and eccentric device also operates .to lower the gripper once more to operative position when the sewing around the toe end has been completed and is described in the said patent as being connected to the updraw lever III of the gripper to control the gripper in the manner just described by a rocking lever 220 and a slotted link ice of the application.
  • a ratchet and cam device is substituted for the ratchet and eccentric device of the machine disclosed in'Patent No. 1,966,479 and this ratchet and cam device acts as hereinafter described upon the bifurcated lever 3I to which the rear end of the updraw rod 2
  • the cam of the said ratchet and cam device also provides means whereby the gripper is, in the manner hereinafter described, prevented from coming into operative position to operate on a shoe at the commencement of the sewing operation until a predetermined number of stitches have been sewn .and may be lifted to an inoperative position just before the conclusion of the sewing operation.
  • the said ratchet and cam device comprises a ratchet wheel I03 secured to a rotatable and transversely extending shaft I mounted in fixed bearings below the level of the shaft 33 on which the bifurcatedlever 3! is mounted and slightly forwardly of the latter.
  • a substantially horizontal and forwardly and rearwardly extending lever I0! is freely pivoted on the ratchet wheel shaft I 05 and is connected at its forward end to the lower end of an upwardly extending link I09 which is connected at its upper end by a pin III to the eccentric strap 39 which surrounds the eccentric 35 which rocks the bifurcated lever 3I to impart to thegripper its rising and falling movements.
  • the pawl I25 is mounted on an eccentric pin I21 which can be rotated to adjust the setting of the pawl heightwise of the ratchet wheel to enable the pawl to engage snugly behind the successive teeth on the ratchet wheel.
  • the ratchet wheel has a cam disc Ill) I29 rigidly secured to it on its right hand side by a screw and slot connection (not shown) which allows the cam to be adjusted relatively to the ratchet wheel if necessary.
  • This cam disc has formed upon its edge a relatively large hump I3I the greater portion of which extends around the cam concentrically with the axis of the shaft I05 through about eighty degrees and a relatively small hump I33 positioned'almost but not quite diametrically opposite the large hump and extending around the cam also concentrically with the axis of the shaft H15 through some thirteen degrees.
  • the said ratchet wheel has secured to its left handface two small shrouding plates I35, I31 which are each of a width (considered around the periphery of the ratchet wheel) equal to the length of two of the teeth on the ratchet wheel and extend radially of the ratchet wheel with their outer edges lying on a level with the topsof the teeth on the ratchet wheel to shroud adjacent teeth from the action of the pawl H5.
  • One of the said plates i. e. the plate.I35 lies opposite the rear end of the small hump 33 on the said cam (considered in the direction of rotation of the cam) and the other plate I31 lies about twenty eight degrees behind the plate I35 also considered in the direction of rotation of the cam.
  • a small cam lever 39 is arranged to be actuated by the said cam disc I29 to raise the gripper to an inoperative position at the appropriate times and this cam lever is freely rotatable on the shaft'33 on which'the bifurcated lever Si is mounted.
  • the small cam lever has a short forwardly extending arm which carries a cam roll I 4
  • a short upwardly extending arm I43 of the said lever I39 has secured to it by a slot and bolt connection an arm I45 which is also freely mounted on the shaft 33 and has a stop-face I4!
  • the pawl I2I which is carried by the rear end of the lever IN is arranged 'to be maintained normally out of engagement with the ratchet wheel by a shielding plate I5I which lies between the pawl and the ratchet wheel and abuts against the pawl.
  • the said shielding plate comprises a thin blade-like member which is secured at its upper end to a laterally extending boss projecting from the left hand side of a curved lever E53 which is freely pivoted on the shaft l
  • the lever I53 is normally maintained in such a position that the shielding plate I5I maintains the pawl l2 I' out of contact with the ratchet wheel by a trip rod I which extends downwardly through an opening in the end of the lever I53 is coupled at its lower end to a bell crank lever which is arranged to be rocked about a transverse horizontal pivot by rearward movement of a knee-operated push rod.
  • the shielding plate I5I will at this time be maintaining the pawl I2I on the rear end of the lever IDI out of contact with the ratchet wheel, a spring I52 serving normally to swing the rear end or the lever I53 downwardly for this purpose until a boss I54 on its lower portion is arrested by contact with a fixed face I55 on the machine.
  • a spring I52 serving normally to swing the rear end or the lever I53 downwardly for this purpose until a boss I54 on its lower portion is arrested by contact with a fixed face I55 on the machine.
  • the stopping position of the machine, of the cam roll I 4! ,on the small hump I33 of the cam I29 is such-that, through the action of certain adjustable cam-roll controlling means hereinafter described, the roll will only have descended upon a lower;,concentric part of the cam when the machine has made apredetermined number (say three) of stitches and the heel portion of the shoe has been'moved by the channel guide I58 of the machine (which acts, as in the prior applicationreferred to, as a work feeding-member) away from the needle through a similar number of stitch lengths.
  • the stopface I41, at the upper end of the upwardly extending arm I45 secured to the small cam lever I39 will move forwardly thus allowing the spring 59 which forms part of the connection between the eccentric strap 39 on the main shaft and the bifurcated lever 3
  • the gripper continues in operation operating prior to each stitch to pull a portion of theupper over the last in the manner described and the ratchet wheel continues to move in a stepwise manner at each cycle of the maclnne. whilethe sewing operation continues along theside of the shoe, towards the toe end thereof;
  • the large hump I3 I on the cam comes beneath the cam roll I41 on the small cam lever l39 and once more rocksthe latter in a clockwise direc-- tion looked at fromthe right and once more causes the stop-faces I41 at the upper end of the arm- I45 to rock the bifurcated lever 3
  • the gripper As the cam roll rides down the said face during the formation of successive stitches, near the tip line, the gripper is allowed (by the forward movement of the stop face I41) gradually to come into operation until, when the toe cap line position on the secondside of the shoe has just been passed, the gripper is once more fully in operation imparting its heightwise and inwardly directed pulls to the upper margin.
  • the cam roll I4l on the small cam lever. I39 lies, when the rotation ofthecam ceases, close .to the forward side of the small hump I33 on the cam and is ready, when the cam once more starts to rotate, to ride up the small cam hump and raise the gripper once more to its inoperative position.
  • the sewing along the second side of the shoe continues towards the heel breast line and when the sewing has proceeded to within about a predetermined number of stitch lengths from the point near the heel breast line where the sewing is to finish, the operator urges the knee operated push rod rearwardly once more and thus withdraws the shielding plate I5I upwardly to allow the pawl I2! to engage the ratchet wheel.
  • the cam roll rides along the said hump and the gripper will be completely raised to.its inoperative position as-the ratchet wheel makes a further step and remains raised while as the ratchetwheel makes three still further steps (and the machine therefore makes three still furtherstitches) and at the end of this time, while the cam roll is; still resting on the small cam hump and the gripper is still raised in its inoperative position the shrouding plate I31 on the ratchet disc which is spaced rearwardly away from the small hump on the cam (considered in the direction ofrotation of the dam) will have lifted the pawl H on the lever I01 out of engagement with the ratchet teeth and the ratchet wheel and cam therefore come to rest.
  • the machine is provided with means 4 controlled by the operator whereby the gripper is delayed from coming into operation to last a shoe until several stitches have first been sewn, is lifted out of operation while sewing around the toe end and may be lifted out of operation at an appropriate time before thesewing operation on the shoe is concluded.
  • the adjustable means aforesaid for controlling the time at which the cam roll I4I on the small cam lever I39 descends from the small hump I33 on the cam after commencing to sew a shoe comprises a depending latch arm I59 which is freely pivoted at its upper end ona horizontal pivot pin I3I which extends in a direction from left to right of the machine. Just-above its lower end the latch arm is provided on'its forward side with a forwardly projecting-shoulder I63 which is arranged, when the gripper is in its inoperative position, to engage the underside of a pin I65,
  • the said latch arm is spaced a short distance away from the right hand face of the cam and is provided along its lower end with a straight slot I61 which is tangential about the pivot pin I9I on' which the arm is mounted.
  • a horizontal pin I69 which'extends through theslot I61 to a the pin I69 and the said pins I13, I15 are of such length that they come into contact, in turn, as the cam rotates with the forward face of the pin I69 and act to rock the latching arm rearwardlyof the machine to release it fromengagement'with the pivot pin I65 for the cam roll I4! on the small cam lever I39.
  • The-two pins I13, I15 on the cam are arranged diametrically opposite each other, the one I13 being arranged somewhat rearward (considered in the direction of rotation of the cam) of the rear end of the small hump I33 on the cam and the other I15 being arranged somewhat forwardly of the rear end of the concentric face on the large hump I3I on the cam.
  • the ratchet wheel will start to rotatein a stepwise manner as previously described immediately the sewing operation commences and the pin I13 which is secured to the cam just rearward of the small cam hump (considered in the direction of rotation of the cam) will abut against the forward face of the pin I69 which is secured to the latch arm immediately the rotation of the ratchet and cam commences.
  • the time at which the latch arm will be rocked rearwardly awayfr'om engagement with the cam roll I4I just after the sewing operation on a shoe has commenced to lower the gripper to operative position can be delayed to enable a greater number of stitches (for example any number up to nine) to be made along the waist of a shoe while the gripper is maintained out of operation.
  • a friction banddevice not shown is provided continuallyto gripthe shaft I05 of the ratchet wheel and cam to prevent the ratchet wheel and cam from being rotated, by the action of the cam roll as it rides down the rear end face of the large cam hump faster than its driving means operate it.
  • the ratchet wheel and cam device of the illustrative machine is moved one step forward for each operation of the machine until the machine has sewn to about the ball on the second side of the shoe and therefore if, during the sewing up to this part of a shoeby the illustrative machine, the thread breaks for example while the sewing is proceeding along the first side of the shoe towards the tip line and the machine shaft makes several further rotations before it can be brought to rest, the ratchet wheel and cam device will by that time have made several further steps forward beyond the position it occupied at the instant when the thread broke.
  • the said means comprises a chart; in the form of a. rotary disc I19 (see Figures 1 and 3) on which is outlined a pattern of a shoe bottom.
  • The'said disc is positioned in clear view of the operator to the right hand side of the machine and is fixed to the forward end of a horizontal forwardly and rearwardly extending shaft I St which is mounted in fixed bearings in a bracket secured to the right hand side of the imachine frame.
  • the rearend of this shaft is coupled by bevel gears (not shownl to the transversely extending shaft 105 onwhich the ratchet wheel m3 is secured so that the disc rotates once in a counter clockwise'direction looked at from the front of the machine for every rotation of the ratchet wheel.
  • the outline of the pattern of the shoe bottom is so positioned on the disc that it lies horizontally across the disc with the toe end pointing towards the right when the machine is inoperative ready for a shoe to be offered to it.
  • FIGs 1 and 3 the machine is shown in a stitches have been made after the commence ment of the sewing operation.
  • a line I83 on the said disc runs from a'point in the waist of the pattern close to the position where the .heel breast line would lie (and corresponding to the positio'n'on the shoe atwhich the sewing would commence) to the periphery of the disc at the left hand side of the latter when the machine is inoperative ready'for a shoe to be presented to .it and a fixed indicating pointer I85 lies opposite the periphery of the disc.
  • Thirty-two other lines are drawn as seen in Figure 3 from points spaced apart around the pattern forwardly of the heel breast line to points spaced equally apart around the periphery.
  • the operator can, by rotating a hand wheel [9
  • the ratchet wheel Hi3 aforesaid is rotated one step for each rotation of the machine shaft and the cam 129 which is'secured to the ratchet wheel and the chart-disc H9 are also therefore rotated one step for each rotation of the machine shaft it might seemnecessary that the ratchet wheel should have a number of teeth which is determined in accordance with the number of stitches to be sewn around the particular shoe to be operated upon and that the exact locations of the humps It i E33 on the cam I29 should be determined by the number of teeth on the ratchet wheel. i V
  • the work feeding instrumentalities of the machine comprise only the channel guide I58 whichengages the work in a non-positive manner and the gripper I which engages only the upper materials extending freely from the margin of the shoe bottom, the distance the work is fed between successive stitches (and therefore the number of stitches made around a shoe) may be determined largely by the feeding effort exerted on the work by the operator.
  • a swinging finger referred to as Flt is provided for urging a portion of the upper inwardly over the margin of the insole before the gripper seizes the said portion to tension it heightwise of the last and over the margin of the insole.
  • Flt swinging finger
  • a forwardly projecting rib 494 which extends substantially horizontally across the welt guide and is turned downwardly somewhat at its forward end.
  • the position of the gripper jaws forwardly and rearwardly of the machine may be adjusted by rotation of a threaded sleeve I25 of said application which forms a support for the lower end of the gripper and ismounted on a forwardly and rearwardly extending stud H22 the gripper receives its upward and downward movements.
  • the arrangement for supporting the lower end of the gripper is somewhat diiferent from that described in the prior specification last mentioned.
  • the gripper is embraced at its lower end by a fork l which extends rearwardly and upwardly and is connected at its forward end to the gripper by the pin 83 which forms the pivotpin on which the movable gripper jaw 55 moves towards and away from the fixed gripper jaw.
  • the fork has a cylindrical stem I91 extending rearwardlyfrom it which passes through a sleeve member its, a shoulder on the forward end of the stern and nut 29! on its rear end serving to hold the stem against endwise movement in the sleeve member.
  • the said sleeve member is pivotally mounted, above the stem, on a short shaft 203 which reciprocates with the feed slide 205 of the machine and extends from left to right of the machine and the sleeve member Hi9 moves with the said shaft 283 in its reciprocations'to impart the work feeding movements to the gripper.
  • the sleeve and stem can therefore rock upwardly and'downwardly about the short shaft 203 in'accordance with the rising and falling movements of the gripper.
  • the said short shaft 293 can be rotated by a hand piece 201 at its right hand end and the portion of the shaft on which the sleeve member I99 is mounted is formed eccentrically of the axis of the shaft so that by rotating the shaft the lower end of the gripper can readily be adjusted forwardly and rearwardly of the machine to suit the special conditions called for by shoes of different kinds.
  • a friction device not shown may be provided to maintain the short shaft in any angular position to which it may have been adjusted.
  • a shoe machine having in combination, mechanism for progressively securing successive portions of a shoe upper and a sole together, an upper tensioning gripper acting in time with the securing mechanism to seize successive portions of the shoe upper preparatory to each securing operation and means driven by the securing mechanism to prevent the grip-per from seizing the upper during a predetermined number of successive operations of the securing mechanism adjacent the heel end of shoe and to cause the gripper to be rendered operative along other portions of the shoe.
  • a shoe machine having in combination, mechanism for progressively securing successive portions of a shoe upper and a sole together, an upper tensiom'ng gripper acting in time with the securing mechanism to seize successive portions of the shoe upper preparatory to each securing operation and means driven by the securing mechanism to prevent the gripper from seizing the upper during the first operations of the securing mechanism on a new shoe and to cause the gripper to be rendered operative during other operations thereafter.
  • a shoe machine having in combination, mechanism for progressively seeming successive portions of a shoe upper and a sole together, an uppertensioning gripper acting in time with the securing mechanism to seize successive portions of the shoe upper preparatory to each securing operation and means driven by the securing mechanism to cause the gripper to be rendered operative along certain portions of the shoe and by step.
  • a shoe machine having in combination,
  • an upper tensioning gripper acting in time with the securing mechanism to seize successive portions of the shoe upperpreparato ry to each securing operation and means driven by the securing mechanism to prevent the gripper from seizing the upper during the first and final operations of the securing mechanism on a shoe and to render the gripper operative during operations of the securing mechanismbetween the times when the gripper is inoperative.
  • a shoe lasting and sewmg machine having in combination, upper tensioning means, sewing mechanismfor securing a'shoe upper and a sole together, means driven by the sewing mechanism for causing the upper tensioning means to be held in inoperative position for a predetermined number of operations as anew seam is started and a manually operated member for causing the upper tensioning means to be held in inoperative position for an indefinite number of operations 'of the sewingmechanismf 6.
  • a shoe lasting and sewing machine having, in combinationjupper tensioning means, sewing mechanism for securing a shoe upper and a sole together, a ratchet.
  • a shoe lasting and sewing machine having in combination, upper tensioning means, sewing mechanism for securing a shoe upper anda sole together, a ratchet wheel driven ina step by step manner by the sewing mechanism, a camconnectedto be driven by the ratchet wheel, means operated by the cam for causing the upper-tensioning means to be held in inoperative position for a predetermined number of steps of-the ratchet wheel as the sewing mechanism starts a new seam, and a manually operated member for preventing rotation of the ratchet wheel for an indefinite number of operations of the sewing mechanism.
  • a shoe lasting and sewing machine having in combination, upper tensioning means, sewing means operated bythe cam for causing the upper tensioning means to be held in inoperative position for a predetermined number of steps of ,the ratchet wheel as the sewing mechanism cornpletes a seam on a shoe, means for stopping rotation of the ratchet wheel for an indefinite number of operations of the sewing mechanismbefore the upper tensioning means is held inoperative and a manually operated member for causing the ratchet wheel to continue its rotation after being stopped.
  • a shoe lasting and sewing machine having in combination, upper tensioning means, sew-,- ing mechanism for securing a shoe upper and a soletogether, a ratchet wheel driven in a step position for a'predetermined number of steps of theratchet wheel as the sewing mechanism starts anew seam and before the seamis completed,
  • a shoelasting and sewing machine having in combination, upper tensioning means,sew-'-, ingmechanism for securing a shoe upper and a sole together, a ratchet wheel driven in a step by step manner by the sewing mechanism, a cam connected to be driven by the ratchet wheel, means 'operatedby the cam for'retaining the upper tensioning means in inoperative position for a predetermined number of steps of the ratchet. wheel as the sewing mechanism starts a new seam and before the seamis completed, a latch for holding the retaining means .to prevent operation of the upper tensionin'gmeans and means actuated by the ratchet wheel for releasingthe retaining means from the latch to permit the upper tensioning means to operate when the cam has continued its rotation.
  • a shoe lasting and sewing machine having in combination, upper tensioning means, sewing mechanism for securing a shoe upper and a sole together, a ratchet wheel .driven in.a step by step manner by the sewing mechanism, acam connected to be driven by the'ratchet wheel, means operated by the cam for retaining the upper tensioning means ininoperative position for a predetermined number of steps of the ratchet wheel.
  • a latch for holding the retaining means to prevent operation of the upper tensioning means
  • an adjustable device actuated bythe ratchet wheel for changing the number of operations of the sewing mechanism in which the upper tensioning means is retained in inoperative position at the beginning of anew seam.
  • a shoe lasting and sewing machine having incombination, upper tensidningmeans'seW- ing'me'chanism forsecuring a shoe upper and a sole together, a ratchetwheeldriven in a step by stepmanner by the sewing mechanism, a earn-connected tobe driven by the ratchet wheel, means operat'ed by the cam for retaining the upper tensioning means ininoperative position for a predetermined number of steps of the ratchet wheel as the sewing mechanism starts a new seam and before the seam is completed, a latch for holding the retaining means to prevent operation of the upper tensioning means, means actuated by the ratchet wheel for releasing the retaining means from the latch to permit the upper tensioning means to operate when the cam has continued its rotation, an adjustable device actuated by the ratchet wheel for changing the number of operations of the sewing mech-,
  • a shoe lastingand sewing machine having in combination, mechanism for progressively securing. successive portions of a shoe upper and a sole together, an upper tensioning gripper actingin time with the securing mechanism to seize successive portionsof the shoe upperpreparatory tov each securing operation, cam operated means fortpreventing the gripper from seizing the upper during certain of the operations of the securing mechanism and; means operated withjthe cam. for indicating tothe operator the position in .which' the shoe should be presented to the securing'mechanism at all times during operatiorrof the machine.
  • a shoe machine having in combination, mechanism for. progressively securingportions of.-a; shoe uppervand a, sole, together, an upper tensioning gripper actinginytime with the securing. mechanism to seizesuccessive pportionsiof the shoe upper preparatory toeach securing operation, levers foractuating thegripper, to open and close in seizingthe upper, connection between the levers comprising a pair of, alined toggle links andia handle for, moving the toggle links into and out of alignmentt prevent atwill the gripper lfrom seizingthe shoe upper.
  • a shoe machine having in combination, sewing mechanism for progressively securing successive portions of a shoe upper and-a sole together, an upper tensioning gripper acting in time with the sewing mechanism to seize successive portions of the shoe upper preparatory to eachsewing operation, and means actuated after a predetermined number 0f operations of the sewing mechanism to prevent the gripper from seizing the upper While sewing about the toe portion of thelshoe and along the beginning and end portions of the seam.
  • a shoe machine having in combination, sewing mechanism for progressively securing successive portions of a. shoe upper and a sole together, an upper tensioning gripper acting in time with the sewing mechanism to seize successive portions of the shoe upper preparatory to each sewing operation, means automatically actuated by a predetermined number of operations of the sewing mechanism to prevent the gripper from seizing the upper while sewing about the toe of the shoe, a manually operated member for causing the upper tensioning gripper to be prevented from seizing the upper at the beginning' and end portions of a seam and means for visibly indicating to the operator at all times the number of operations of the sewing mechanism remaining before the gripper is automatically prevented from operating at the toe portion of the shoe.
  • a shoe lasting and sewing machine having, in combination, stitch forming devices for progressively sewing successive portions of 'a shoe upper and sole together, an upper tensioning gripper acting in time with the stitch-forming devices and during a portion only of the operation of sewing a shoe, and means for indicating to the operator the proper relative position in which the shoe should be presented to the stitch forming devices at alltimes during the sewing of a shoe. 7 r
  • a shoe lasting and sewing machine having, in combination, stitch forming devices for progressively sewing successive portions of a shoe upper and sole together, an upper tensioning gripper acting in time with the stitch forming devices and during a portiononly of the operation of sewing a shoe, a dial having an-outline of a shoe, a pointer cooperating therewith to indicate tothe'operator by the point on the outhne designated by, the pointer the proper relative position in which the shoe should be prcsented to the stitch forming devices at all times during the sewing of a shoe, and means for actuating the dial.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US689097A 1932-10-21 1933-09-12 Shoe sewing machine Expired - Lifetime US2002136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB29415/32A GB409005A (en) 1932-10-21 1932-10-21 Improvements in or relating to boot or shoe sewing machines

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US2002136A true US2002136A (en) 1935-05-21

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US689097A Expired - Lifetime US2002136A (en) 1932-10-21 1933-09-12 Shoe sewing machine

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US (1) US2002136A (enrdf_load_stackoverflow)
FR (1) FR763155A (enrdf_load_stackoverflow)
GB (1) GB409005A (enrdf_load_stackoverflow)

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FR763155A (enrdf_load_stackoverflow) 1934-04-24
GB409005A (en) 1934-04-23

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