US1905184A - Shoe supporting jack - Google Patents

Description

April 25, 1933. A. R. MORRILL 1 SHOE SUPPORTING JACK Original Filed Nov. 23, 1927 2 Sheets-Sheet l 2 Sheets-Sheet 2 April 1933- A. R. MORRILL SHOE SUPPORTING JACK Original Filed Nov. 23 1927 Patented Apr. 25, 1933 ALFRED n. MORRILL, or BEVERLY, 'mssAcnusEr'ra AssieNon TO UNITED anon MACHINERY coRroRArIom'or rn'rnnsoir, NEW .rnn'snvjaconrom'rron on NE JERSEY Original application filed November 23, 1927,.S'eria1No. 235,369, Divi m a, 1931. serial ms. 549,377.

The present invention relates to automatic shoe machines and is herein shown as embodied in a horn sewing machine for sewing the outsolesto the insoles andassociated uppers of so-called-McKay shoes. In this machine the shoe'is supported upon a jack and the jack and the sewing mechanism are moved relatively to transfer the point of operation about the shoe, and to change the relative positions of'the shoe and the operating means to cause the shoe to be presentedproperly to the operating means as the point of operation is 'transferred about the shoe, all of the relative'movements of the shoe'and the operating means being produced and controlled by automatically acting mechanism.

The object of the present invention is to provide a novel and improved shoe supporting jack which is particularly adapted for use in a machine of the general type above described. 1 1

With this and other objects ingview, as will hereinafter appear, one featureof the present invention contemplates the provision of a shoe supporting jack which is pro vided' with gripping devices adapted to grip and hold an unlasted shoe during the positioning movements of the' jack free from interference with the horn or other devices for operating on the :shoe. In the construction hereinafter described, the jack comprises a toe support and a heel support, these parts being movable relativelyto each other-and forced yieldingly toward one another to grip the shoe. A wedge-shaped toe rest mounted on the toe support is adapted to fit into the crease between the upper and attached insole ofthe shoe and a corresponding wedge-shaped-heel rest is mounted on the heel support to fit into the corresponding crease between the upper and the insole at the heel. In order to secure the shoe firmly in position, the heel rest described forms one of 'two"clainping jaws,

the other being mounted to move relatively thereto ,to' engage the outer'surface of the sole so that the sole may be clamped firmly between the two 'jaws.- This construction and arrangement of the 'jack enables the siron surronrrne .mcx

ded and this application and shoe to be gripped firmly and accurately the jack and presented'properly to the shoe operating devices without the necessity ofv any particular skill on thepart of the; operator and without the use iofadditional locating devices correspondingin size to the shoe being operated upon. 1 v

The several featuresof the presentinven- 1 Hon consist also in the devices, combinations and arrangement of parts hereinafter described andclaimed, which together with the advantages be readily' understood by 'one skilled-in the art-from the following descriptiontakenin connection with the accompanying draw- Figure 1 isa view in front elevation of one embodiment of the invention in an -auto niatic McKay horn shoe sewingmachine'; Figure 2 is i of the jack detail sectional plan view, taken on the line 33 of Figure2; and Figure 4-isa front view partlyin section of. certain of the parts shown 'in Figure 2; illustrating the operation of the mechanism for automaticallyop ening-the jack to release ashoe on which the solev sewing operation has beenwpel 1 1:- H. p;

The machine herein disclosed as embodying the several features of the present in vention comprises a chainstitch's'ewing machine of the McKay'type employing a straight hook needle and a whirl containing horn which extends within the shoe and is rotatable to assume, at all times; the most desirable position with relation to the work. For acomplete description of the machine, reference may be had to the inventor s pending application Serial No. 235,369 filed .November 23, 1927 foranAutomatic shoe machine of which'the present application is a division. The machine, except as described in the present application and-in the application above referred to, is similar in construction' and in the general arrangment of a front view. partly in section in open position; Figure 3 is&

to be obtained thereby will the parts to that disclosed-in the patent to V particularly the subject-matter of the present invention is arranged to grip a shoe entirely from the outside at the heel and toe to support the shoe and present it properly to the sewing mechanism -without, at the same time, interfering with the movement of the horn within the shoe. The mechanism for actuating the jack to transfer the point of operation about the imparting" movements to present the shoe properly to the work operating devices is similar in general construction and mode of operation to that described in the patent to Laurence E. Topham and Alfred B. Morrill No. 1,- 616,714,- dated February 8, 1927. In the drawings, the sewing machine eleinents', as generally indicated in Figure-1, include a straight hook needle 20, a cast-off 22; a feed point24, apresser foot 26 mounted on. the head and driven from the sewing cam shaft 27, anda horn 28 containing a whirl v,30- of usual construction. 7 :The jack for supporting the shoe during the operation'of the machine comprises a curved main. arm 32 which carries the instrumentalities for grasping and releasing the shoe and is. pivotally supported at its lower-end on a casing 34 formed on one; end of the lever arm 36. The jack is mounted. on the gimbal ring 38 by means of the beari-ng pins 40 the ring in turn being pivoted to swing upon bearing pins 44 which are formed'onthe ring and at their outer ends engage bearingsin a wheel 46. 'The common axisof the pins 40 is located substantially at right angles-to the common axis of thetbearing pins 44 to permit-the jack to swing'freely in anydirection about its connections with thewheel 46. The wheel 46 is mounted to rotate on-uaivertical sleeve 48 formedzin the caslng 34 and has a groove 50 formed in its outer surface to receive a'cord 52 for rotating the jack as the different sides of the shoe are presented to the sewing mechanismwv I The position: of the shoe on the jack is determined irrespective of its size by contact witha toe support 54'rigidly mounted on 'a curved arm 56 formed on the upper end of the arm 32 which comprises the main supporting column of'the jack. The toe support 54 consists of a. horizontally placed wedge adapted to fit'into the recess between the soleland upper of the. shoe and having a concave edge conforming approximately to the shape of the toe. The heel support consists of a lever'arm 58 having at its upper end a wedge-like projection 60 to rest against the heel portion of the upper adjacent to the sole and pivoted at its lower end on astud 62 within the arm 32 near the base of the jack. ,A heavyv spring 64 wrapped 7 about the stud 62 with a loop resting against the-arm 32' and with the ends bearingagainst ver 58 and an arm shoe and for the requisite tipping and turning" support means of a clamp 78 formed on the upper the lever 58 tends to swing the lever towards the toe rest. The jack is maintained in open position against the pressure of this spring by means of a toggle lever having an arm 66 pivoted at 68 on the heel supporting le- 70 pivotally mounted on a stud 72 on the arm 56. A spring 74 coiled about the stud 72 and anchored to the pin 76 tends to hold the toggle lever in "its straightened position."

The shoe is, clamped firmly to the heel during the sewing operation by endof a bar 80 which is adapted toslide vertically in guides formed in the lever 58. The bar is pivotally fastened at its lower end by a stud 82 to the lever 84 which forms one arm of a toggle lever, thelower arm 86 being pivoted at 88 on the lever 58.

The stud 82 extends through a slot 90 in the lever 58to givedirection to the thrust of the upper endrof the toggle. .A link 92 is also fastened to the stud 82 and is connected by meansof slot 94-to the connecting pin 96 of the two toggle arms 66 and 70. It will; be seen. that when, the toggle joint formed by levers 84 and 86 is broken the stud 82 is depressed'causing the clamp 7 8 to descend into clamping position and also acting to break the toggle joint of the levers 66 and 70-so that the heel supporting lever 58 will swing toward the toe rest under the influence of'spring 64. A rod 98pivotally mounted onthe stud 82 andadapted to slide in a bracket 100 on the heelsupporting lever 58 carries acompressior' v spring 102 coiled about it between the bracket 100 and a shoulder 104 on'therod in order to force the stud 82 downward when the toggle composed of levers84and 86 is broken and alsoto exert a clamping pressure on the clamp 78. The mechanism for breaking the toggle comprises anarm' 106 on the toggle lever 84 which is'adapted to engage withia lever 108 pivoted at 110 on the heel supporting lever 58. In placing a shoe in the jack the upper end' of the lever 108- is engaged by the heel portion of theupper and is forced backwards causing the, lever 84 to be turned about the stud 82 as a pivot to break the toggle.

During thesewingoperation the jack is rotated .ina counter-clockwise direction through approximately 180 and is then returned to its original position preparatory to receiving a new shoe. Mechanism is provided for causing the shoe holding devices in the jack at this point in the operation automatically to release the shoe so that it may be easily withdrawn by the operator and a new shoe inserted. A vertical shaft 111 having a bracket 112 at the upper end and securedby means of a nut screwed on its 'lower end is rigidly mounted within the sleeve 48;;in the "casing 34, which supports the jack. The bracket 112, thus rigidly secured with relation to the casing, carries a gimbal ring pivoted at points 114: which, in turn, carries abracket 116 pivoted at 118 at substantially right angles to the common axis of the bearings 114. With this construction the threaded spindle 120 which is formed on the bracket 116 and projects upwardly into the jack is permitted to swin freely about its connections in company with. the jack, but is secured rigidly against turning. A nut 122 carrying a cam surface 124 is adapted to turn on the threaded spindle, the pitch of the threads being sufiiciently steep so that a small turn will raise the nut a relatively long way. To cooperate with the nut a lever 126 is mountedon the stud 62 and has one arm held yieldinglyin engagement with the top of the nut by means of a spring 128 stretched between an eyelet 130 on the lever 126 and an adjustable screw eye 132 on the body portion 32 of the jack. The other arm of the lever 126'carries a bearing surface 134 adapted to come in contact with an arm 136 of the toggle lever 86 and operates to straighten the toggle into a position where it is held by a stop pin 138 on the heel supporting lever 58. The lever 126 also carries a ledge 140 to engage the heel supporting lever 58 and force it away from the toe support .54 against'the pressure of the spring 64. A small controlling lever 1 12 is mounted on the body portion 32 of the jack and is held in engagement with the cam surface 124of the nut by a spring pressed plunger 144. When the jack is rotated in a counter-clockwise direction during the sewing operation, the lever 142 will ride on the cam surface 124 without effect, but as the jack is returned to starting position, the lever engages a projection 146 on the cam causing the nut to rotate about the threaded spindle 120 and through the mechanism above described to open the jack and releasethe' shoe.

The jack is movably mounted in the machine and automatically controlled so that the shoe is presented to the sewing mechanism and maintained in the proper relative position thereto at all times while the stitching progresses around'the shoe. When the sewing is completed the jack automatically returns to starting position. The shoe with its supporting jack is moved laterally in the line of feed to transfer the point of operation about the shoe and is guided during this movement by the engagement of the presser foot 26 with the stitch' receiving channel of the sole to determine the outline of the seam on the sole. As the point of operation is transferred about the shoe the jack is tipped about the channel guide as a fulcrum and laterally rotated to position the shoe properly with relation to the sewing mechanism. The lateral movement of;

the jackto feed the shoe is imparted thereto by devices acting to feed the jack, and the feeding devices of the sewing mechanism which directly engage the shoe and cooperate with the jack moving feedingdevices. The sewing mechanism and the positioning mechanism are driven in timed relation to each other, the sewing mechanism. being stopped automatically at the endof the seam, while the positioning. mechanism continues its operation to turn the jack back to starting position. m 1 i The jack is supported'asabove described on the forward end of the horizontally arranged arm. 36wl1ich is mounted at its rear end to swing vertically about a stud 148 fixed on asupport 150. Thejack and arm 36 are supported in an approximately horizontal position by means of a cord -152hav-. ing both ends fastened to eyelets .upon. the arm 36, and running over two stationary pulleys 156 mounted above thearm 36. on the machine frame, one. on each'side, to'permit the lever to, swing freely on a horizontal plane. The cord also passes around a pulley 158 mounted on a weight 160 which counterbalancestheiweight of'the jack while permitting it to be moved easily up or down. The support 150 for the jack supporting arm 36 is, in turn, mou nted ona vertical lever 162-to rotate in a plane slightly inclined from the horizontalto impart move mentstothe lower end of the jack in the line of feed. The vertical lever 1625 is forked at its base and isf pivotally mounted in-the machine by means of bearingpins to swing forwardly and rearwardlyand impart the required tipping movements to the jack. The cord 52, above mentioned, through which rotary movements are 1111-, parted to the jack,-is connected to a wheel 182 loosely mounted to turn on thevertical shaft 184 and is guided over suitable pul'- I leysqaround the wheel 46 and down to a pulley 186 mounted on a weight 188 which tensions the cord and tends to rotate the ack in a clockwise direction tostarting position. The wheel-'182'is rotated to pull inthe cord 52 against the pressure of the weight 188 to: rotate the jack and shoe ina counter-clockwise direction during the operation'to transfer the, point of operation about the shoe by means of connections with the pattern cam shaft 178.. q

The movements of theimembers of the.

jack supporting structure for. imparting tipping and rocking movements to the jack are controlled by means of pattern-cams on the pattern cam shaft l78qthrough' connections which are:fully set forth in the parent application and in'the patent to Topham and Morrill above referred'to;

The invention h aving beendescribed, what is claimed is: v a a 1. A machine: for operating on shoes having, in combination, means for operating on a shoe, a work supporting horn arranged to extend within the shoe and a shoe supporting jack provided with heel and toe supports movable towards and from each other, clamping jaws mounted on the heel support arranged to receive the rear edge of the shoe sole between them, and a rest on the toe support arranged to enter the crease between the upper and sole at the toe of the shoe.

'2. A machine for operating on shoes having, in combination, means for operating on a shoe, a work supporting horn arranged to extend within the shoe and a shoe supporting jack provided with heel and toe supports, said jack being movable with relation to the horn and operating means to transfer the point of operation'about the shoe and clamping jaws mounted on the heel support arranged to receive the rear edge of the shoe sole between them. i

8; A machine for operating on shoes having, in combination, means for operating on a shoe, a work supporting horn arranged to extend within the shoe and a shoe supporting jack provided with heel and toe supports, clamping jaws mounted on the heel supportarrangedto receive the rear edge'of the shoe sole between them, and means rendered operative by placing a shoe in the jack for actuating the jaws to clamp the-sole.

4. A machine for operating on shoes having, in combination, means for operating-on a shoe, a work supporting horn arranged to extend within the shoe and a shoe supporting jack provided with heel and toe sup-.

ports, clamping jaws mounted on the heel support arranged to receive the rear edge of the shoe sole between them, a spring for closing the jaws, a locking device for holding the jaws separated, and means operated by placing a shoe in the jack. for actuating the locking device to release the jaws.

I 5. A'machine for operating on shoes having, in combination, means for operating on a'shoe, a' work supporting horn arranged to extend within the shoe and a" shoe sup-' porting ack provided with heel and toe supports movable towards and from each other,

clamping jaws mounted on the heel support arranged to receive the rear edge of the shoe sole between them, springs tending to close the jaws and move the supports towards each other, locking devicesfor holding the jaws and supports separated, and means operated by placing a shoe in the jack for actuating the locking devices'to release the jaws and supports.

6. -A' machine for operating 'on shoes having, in combination, means for operating on a shoe,awork supporting horn arranged to extend within the shoe and a shoe supporting jack provided with heel and toe supports movable towards and from each other,

said jack being movable with relation to the horn and operating means to transfer the point of operation about the shoe, clamping jaws mounted on the heel support arranged to receive the rear edge of the shoe sole between them, and means acting at the conclusion of the operation on the shoe to separate the jaws and supports to release the shoe.-

7. A machine for operating on shoes hav-' ing, in combination, means for operating on a shoe, a-work supporting horn arranged to extend within the shoe-and a shoe supporting jack provided with heel and toe supports movable towards and from each other, said jack being movable with relation to the horn and operating means. to transfer the point of operation about the shoe,.clamping ports movable towards and from each other,

said jack being movable with relation to the horn and operating means to transfer the point of operation about the shoe,.clamping j-aws mou'nted on the heel support arranged to receive the rear edge ofthe shoe sole be.-

tween them, and means actuated by the return offlthe jack to initial'position for sepalpatmg the jaws and supports to release the 0e. s

9. A machine for operating on shoes having, incombination, means for operating on a shoe, a shoe supporting ack providedwith heel and toe supports, and clamping jaws on the heel support arranged to receive'the rear edge of the shoe sole between them, said jack being movable with relation to the horn.-

and operating means to transfer the point of operation about the shoe.

1.0; A machine for operating on shoes hav ing, in combination, means for operating on a shoe, and a shoe supporting ack provided with heel and toe supports movable towards and from each other, clamping jaws mounted on the heel support arranged to receive the rear edge of the shoe .sole between them, spring means for imparting a clamping ac tion to the jaws, spring means tending to, 7

move the heel and toe supports relatively towards each other, toggle connection for holding the awsseparat'ed against the action of the spring means, a toggle connectionfor holding the'heel and toesupports separated, and a trip member actuated upon placing a shoe in the jack to, break the-tog gle connections to clamp a shoe in position.

11. A machine for operating on shoes having, in combination,means for operating on a shoe and a shoe supporting jack provided with heel and toe supports movable relatively towards and from each other, clamping Ljaws mounted on the heel support arranged to receive the rear edge of the shoe sole between them, means for imparting a clamping action to the jaws, means tending yieldingly to move the heel and toe supports relatively towards each other, a locking device for holding the jaws separated, a locking means for holding the heel and toe supports relatively separated, and a trip member adapted, upon insertion ofthe sole portion of the heel between the clamping jaws, to release the said locking devices. 7

12. A machine for operating on shoes having, in combination, means for operating on a shoe and a shoe supporting jack provided with heel and toe supports movable I relatively towards and from each other, clamping jaws mounted on the heel support arranged to receive the rear edge of the shoe sole between them, means for yieldingly moving the clamping jaws into clamping relationship, means tending yieldingly to move the toe and heelsupports relatively towards each other, a toggle connection for locking the jaws in a separated position, a locking device for holding the toe and heel support in separated position, and means acting at the end of the operation on the shoe to move the toe and heel supports relatively apart and to straighten the toggle connection to separate the clamping jaws.

13. A machine for operating on shoes having, in combination, means for operating on a shoe, and a shoe supporting jack provided with heel and toe supports relatively movable towards and from each other, a screw threaded member in the jack fixed against rotary movement with the jack, a nut fitted to turn on the screw, mechanism for imparting turning movements to the jack to transfer the point of operation about the shoe and to return the jack to starting position, a lever engaging with the nut, means for causing the nut to rotate with the jack and actuate the lever, and means actuated by the lever to separate the heel and toe supports.

In testimony whereof I have signed my name to this specification.

ALFRED R. MORRILL.

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