US1202293A - Shoe-supporting jack. - Google Patents

Description

I A. vE. JERRAM.

sHoE `suPPoRTAlNG uAcK. APPLlcATloN-mzu 1150.16. ma.

1 ,202,293 v Patented Oct. 24, 1916.

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Witnesses: 7 jhvmtar:

A. E. JERRAM, SHOE SUPPORTING MCK.

APPLICATION FILED DEC- I6. |913.

Patented Oct. 24, 1916.

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y AInvenzion- 7dana/W A. E. JERBAM.

sHoE suPPoRTlNcJAcK.

APPLICATION FILED DEC- IS. I9I3.

1,202,293. Patented Oct. 24,1916. I

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SHOE SUPPORTING JACK.

APPLICATION man uic. 1e. Isls.

Patllted 0G17. 24, 1916.

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A. E.. IERRAM.

sHoE SUPPORTING JACK.

APPLICATION FILED DEC. I6, l9l3.

Patented Oct 24,1916.

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ARTHUR ERNEST JERRAM, OF LEICESTER, ENGLAND,V ASSIGNORv TO rUNITED SI- IOE MACHINERY COMPANY, OF PATERSON, NEW -JERSEY, A

JERSEY. l l

CORPORATION 0F' NEW snoE-sPPoRTING JACK.

A 'e Appiiati ined nebenher 16, 1913.Y Serin 110,807,085.

T 0 all whom t mag/concern.' I A Be it known that I, ARTHUR E. JERRAM, asubject of the King vof vGrreat) Britain, residing at Leicester, in the county of Leicester, England, have invented certain new and useful Improvements in Shoe- Supporting Jacks ,and I do hereby declare thefollowin'g to be a full, clear, and exact; description o-f the invention, such as willV enablejothers lskilled in the art to which itappertains to make and use the same. 'f rlhe present invention relates to Work-'supports for lasted boots or shoes, and more particularly to devices of this characterf'em'- ployed in connection with sole leveling machines.

It frequently happens that these machines operate upon' constantly varying sizes of shoes, and as the work support'must he separately adjusted foreach different size, a considerable degree of care and skill upon the part of the operatorA is required to position the shoe properly upon the l,j ack in vaddition to the usualoperation of jacking' the shoe.

The object ofthe present invention to relieve the operator o f the necessity of adjusting the jack for varying sizes of ,shoes and to perform the variousadjustments of the jack automatically in connection with the j acking` ,of the shoe. Y 'With this object in view, a feature of the invention contemplates the' provision lin a jackof the usual type having a toe post and a lieelpost relatively vmovable towardrand from one another, of. mechanismfor automatically positioningtheshoeupon the jack in a predetermined relation to the operating tool, and for next clamping the shoejin its adjusted position upon` the jack.' Y

,A further feature ofthe inventionjconsists in the provision ofV relatively movable toe and heel posts, asingle jackingv lever, and operative connections for causing a con-l tinued movement of. the levertoV first relatively move the toe and heel posts to adjust theA shoe upon the jack kin ya predetermined relation to the operating tool, and vfor next clamping, the shoel inthis position..

In the illustrated einbodimentofthe vention the ,shoe is automatically VVadjusted in a predetermined vertical and vlongitudinal position with' relation to the .operating toolr prior to the Yclampingof thefshoein position in order to properly position'the sole oftheshoe irrespective of the length ofthe shoe. or the depth of the last. [Still further features of the invention consist in certain novel features of construction,

combinations .and arrangements of parts hereinafter described and claimed,- the advantages of which will heolovious to those skilled in thejart from the following description. y e.

In the accompanying drawings illustratingrthe preferred form of the invention, Figure 1 represents a side elevation of thejack,

with its various parts in thevr position they assume when ready Jfor the reception of the shoe; Fig. 2' is a View similar to Fig. 1, with the partsin the position they occupy when the shoe isclamped in position; Fig. 3 is a View similar to Fig. 2, illustrating the 'alteration effected in the position of the parts when a shoe of shorter length is jacked; Fig. l is a detail illustrating the construction of the locking means for the last carrier;l Fig. 5 is a detail illustrating a plan view of the mechanism for varying4 theextent of traverse ofthe leveling roll and jack; and Figs. 6 and 7 are details illustrating'a plan and elevation respectively of a modified construction for locking the last carrier in operative position.

According .to thepresent invention, thc lasted shoe isnheld'rigidly in position by a toerest 1, a last pin 3, and a heel clamp 5, the last pin 3 yloeing forced upwardly and canted with its carrier'or heelpost 6 so that rthe heel seat of the shoe is forced upwardly against theiheel clamp 5 and at the same time the toe of thefshoe is pressed downwardly on the toe rest 1.

In order to accommodate toes of varying heights, the toe'rest 1 is supported yieldingly, the toe of the shoe being inserted by the operatory between the toe rest and the underside ofa suitable type of gaging device (not shown) in order to permanently position the toe portion of the sole at a predetermined height.A After the toe rest Ahas been depressed the required amount, and prior to the movement ofthe jack beneath the leveling roll, mechanism isprovided for automatically locking ythe toe rest 'against further downward movement during the operation of the machine. In the illustrated embodiment of the invention the toe rest 1 is mountedY upon a vstem 7 which projects downwardlyinto a recess 8 formed inthe toe rest supporting post 9 and is yieldingly sustained in `an elevated position by a spring 11 located in the bore 12 of the stem 7 and interposed between the top of the bore and a pin 13 extending across the recess 8. The mechanism for locking the toe rest comprises a roll 15 positioned between the outer surface of the stem 7 and a hardened inclined surface 17 located in a hollow in the toe supporting post 9. It will be n oted from an inspection of Fig. 2 that the direction of the inclined surface 17 is such that if the roll 15 is free to move it will fall into position to lock the rest 1 against downward movement, and in order to lift the roll at c'ertain predetermined intervals, for example when the work is inserted, a thrust rod'is provided. The thrust rod is automatically operated at the proper time to raise the roll vand unlock the toe rest in order that it will be free to assume the position determined by the height of the toe before it is again locked in position.

The toe rest supporting post 9 extends downwardly and is fulcrumed upon the machine frame 20 at 21. `Therjack, as a whole, rocks about the axis 21 which is located at a distance from the leveling tool to coincide with the center of the arc which supporting post 9 and consequently the jack swings, as a whole, upon the main fulcrum 21 to traverse the work beneath and in conf tact with the leveling roll 23. l

In order to position the heel seat of the .j A. shoe correctly, the heel clamp 5 is carried 40 on an upwardly extending arm 25 which is vprovided with a gaging face arranged to contact with the counter of the shoe at the heel. The arm` 25 is mounted upon a projection 27 extending outwardly from the toe supporting post 9 so that the heel clamp 5 may swing toward or from the toe rest 1 to accommodate lasts of different lengths. Thearm 25 is fulcrumed upon the projection 27 at 30 and it will be noted from an inspection of the drawings that the fulcrum about which the heel clamp turns is located nearer the face of the sole vthan the main fulcrum 21.v The curvature of the heel seat does not conform with the curvature of the shank first advanced to engage with the counter of the shoe by a hand lever 32 which also effects automatically, and in the proper sequence, the locking of the heel gage against backward movement, the locking of the toe rest against downward movement, and the raising and tilting of the last pin carrier 6 to cause the shoe to be locked in the jack. The movement of the jack in relation to the operating means locks the support of the last pin carrier 6 so that the downward thrust upon the sole during the leveling operation shall have no tendency to cant thelast pin and split the last.

To effect the advancing movement of the heel gage the jacking lever 32 is constructed and arranged to initially act as a lever of the first class and to iinally shift its fulcrum and act as a lever of the second class. The lever 32 is fulcrumed between its ends at 35, and is connected at the end opposite its handle to an arm 36 through a link 37. rThe arm 36 is pivoted at 38 upon the arm 25, thus causing the heel gage to be swung about the fulcrum 30 as the handle of the jacking lever 32 is elevated. This movement causes the heel gage to first contact with the counter of the shoe, and to next push upon the shoe until the toe is 4correctly positioned upon the toe rest 1. A continued movement of the jacking lever then rocks the arm 36 about the fulcrum 38 against the action of the spring pressed plunger 40 which engages with the stop face 41 formed upon the end of the arm 36. This movement causesythe toothed block 42 secured to the arm to engage with a toothed segment 43 secured to the toe'supporting post 9. Normally the toothed block 42 is maintained just clear of the segment 43 by the spring pressed plunger 40 and the stop face 45, which determines the position of-the arm 36. The arm 25 carrying the heel clamp may be moved freely backward and forward within limits determined by a pin 46 projecting from the toothed segment 43'and arranged to engage a toe 48 formed upon the toothed block 42. The jacking lever 32 is fulcrumed at 35.,upon a pivot member 50, which in turn is fulcrumed at 51 upon an arm 53 forming an extension of the toe supporting post 9. The pivot member 50 extends beyond the fulcrum 35 at which the lever 32 is centered, and is connected at its end by a Vlink 55 with a rearwardly projecting portion 56 of the last pin carrier 6. The last pin carrier is fulcrumed at 58 upon the upper end of a yieldingly mounted rod 60 which is normally maintained in an elevated position by a spring, but may be locked in position as hereinafter described. The pivot member 50 is provided with an extension 61 carrying a toothed segment 62 which is engaged by a locking latch 65 controlled by a finger lever 66'carried on the handle of the jacking lever 32 so that the parts may be locked in their adjusted'position. Vith the foregoing arrangement the throughthe'link 55 the lastp'iny carrier is then rockedy to bring the heel seat': of the shoe into Contact with the under side of the heel clamp5 and press the toe against the toe rest 1. The pivot member is lalso provided with a stop or abutment 7 0 formed upon its lower end, which engages withL a coperating vstop face 71y formed on the lever 32, the provision lof these stops insuring'that in unjacking ythe shoe the jacking lever `can not be moved beyond the toothed segment.

`As stated heretofore,.the toe rest lis provided with a locklcomprising ak roll 15. which is arranged to prevent downward movement of the toey rest unlessthe rollis acted upon by a releasing rod 7 3. When the partsr of the jack are in their inoperative position, as shown in Fig. 1, the rod 73` is arra'nged'to lift the roll 15 from the inclined surface .'17 and leave the toe rest 1 free to move sothat it may assume a position governed by the height of the toe. As soon as the'lever32 is operated'to eect the turning of the heel pin carrier this releasing rod 7 3 is removed from contact with the roll so that the latter will engage the inclined surface 17 and stem 7, and thus lock the vtoe rest in its adjusted position. To this end a tappet-screwf7 5 is threaded in a boss formed on the pivot member 50 and engages with anabutment yface formed on 'one armof a bell crank ylever 76 fulcrumed at 77 on the toe supportingpost 9, the other. armof the bell crank lever being connected 'with the lower end of the releasing rod 73. Movement, therefore, of the pivot member 50 bythe lever-32 removes the screw?? 5 from the abutment iface and per: mits the bell crank to be rocked by a spring Dressed plunger78 mountedinv a bore in the toe rest supporting-post, thus: removin'gfthe rod 73 fromthe roll' and allowing the lock to operate. lPrior tol the movement of the jack beneath the leveling roll they height gage is removed out ofthe path of thel roll by mechanism not jshown..` I

In order to rigidly supportthe last pin duringfthe Voperation yof the machine and prevent the splitting of` the last owing tothe pressure upon the shoe sole,ithev rod 60 1s automatically locked during `the operation of the machine, thus rigidlysupporting the lastpin carrier at twopointsand prevent,-v ing any-` tilting movement4 of. the same. As

illustrated in Fig. of the drawings, the

'slide rod 60 extends downwardly andpasses through a guide passage formed in a clamp.- ing block 8O fulcrumed at 30. The rod is supported bya spring 81 attached at kits lower end to the rod and at its upper end yto the clamping block, and cooperating means are provided. for limiting the height to which the rod 60is elevated by thefspring. Within the Clamping block is a rotary cam or clamping member S3 which isnprovided with an arm 84 provided with a cam roll 85 journaled upon its free end andconvnected by a springSS with the clamping block 80, the spring normally tending to depress the arm and cause the clampingmem- -ber 83 to engage .with and clamp 4the rod .60. When the jack is retracted or in a poyabout the vfulcrum 2li to move .the shoe'beneaththeleveling roll 23 and at the initial part of this movement the camroll 85 is. released by the stationary cam 87 and allows toothed pinion .91 secured to a shaft 92v journaled in a Iblockv93' throughwhich vthe slide. rod passes.A The block V93,-gsimilar to the prior construction, is centered upon the lfulcrum 30, and inthe modified construction a counter-balance 94 is providedto balance thegweight ofthe/several. parts and allow thesblock to be turned readilyon the fulcrum when the,- slide rod is adjusted to different heights. `Also attached to the shaft 92 is a friction disk 95 which 'is arranged `at intervals, to,contact lwith abrake shoe 96 and so` hold the friction disk from further rotation andlock the slide rod during the leveling operation. The brake kshoe 96 is normallyretained in 'anoperative position when the jack is retracted -by a spring 97,

and thesh'oe isprovided with` a stop pin 98 whichy projects overA an extension 99of the frame, andV is held in Contact with the upper iso 'in opposition to the spring 100 until the shoe has been jacked bythe combined uaction* of the heel clamp, last pin'and toe rest, as previously described. During the. movement of the slide rod throughy the clamping block the pinion and friction disk will be turned freely, the brake shoe at this time being held out of contact with the disk by Athe joint action of the stop pin 98 and exthe rod and its associate parts in the rejack takes place.

quiredk position.

In order to determine the height 4to which the slide rod is elevated, and thereby insure 'a predetermineddefinite relation between the last pin and heel clamp, devices areprovided which comprise a cam roll 102 journaled upon the slide yrod and projecting within a recess formed as an inverted V in an enlarged portion .of the upwardly extending arrn 25 of the 4heel clamp.` When the slide rod is released by the clutch mem:- ber it is elevated by .the spring until the roll-102 contacts with the upper face 103 of the recess along which it travels until the -cam'rollreaches the apex of the V, where` upon the movement of the last pin carrier in this direction is stopped.

-The jack is` conveniently actuated by a worm gear segment 105 which is adj ustably connected 4to the jack proper and which meshes with a driving worm 106` secured to a drive-shaft 107. The shaft 107 is driven from any suitable type of gearing comprising a reversing device actuated as the jack reaches each-end of.y its stroke in order that the shaft may be rotated alternately in opposite directions to oscillate the jack backward and forward beneath the leveling roll. As the driving and reversing means form yno part of the. present invention, and may be of any suitable construction, they arenot'shown in connection with the present invention. k,In order to vary the relative traverse of the roll and jack in accordance with theadjustment lof thejack, however, it is found convenient to vary the time atwhichthe Vreversal of movement of the To this end the worm segment 105 is connected `with a rod 110 through a ioating link 111 movable between opposed surfaces 112I and 113 positioned a varyingdistance apari-l in order that the height of aroller 114 on the floating link shall introduce more or less lost'motioninto the driving connections, and correspondinglyalter the time at which the reversal of motion takes place. ,The-opposed surfaces `are arranged,y as shown in Fig. .5, at

attached at one end to a bracket118 secured .to the machine vframe and projecting above .the pulley 116.4 From the .pulley116 the cord passes'over a second 4pulley 120 journaled upon the segment 105 and centered at the same pointat which the link 115 is connected to the segment. From the pulley 120 the cord passes to one end of a segment 121 that forms a portionA of the upwardly extending. arm 25 carrying the heel gage. It will'tlius be seen that as the heel gage ismoved a greater or less extent, depending upon thesize of the shoe being jacked the segment' 121 will be correspondingly turned and more or less of the cord passed about the pulleys 120 and 116. This will lower they floating link 111 more `or less and vary the lost; motion to be introduced into the connection, thus shortening or lengthening thel time between the reversals of the mechanism.

While it is preferred to employ the specilic construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as specified in the claims, and may be changed or modified without departing from the broader features of the invention.

The invention having been described, what is claimed is c l. A shoe supporting jack, having, in combination, a toe post and a heel post' relatively movable toward and from one another, and mechanism for automatically positioning the shoe upon the jack in a predetermined verticalv position with relation to the operating tool and for clamping the shoe in its adjusted position.

2. A shoe supportingfj ack, having, in combination, a Vtoe post and a heel -post relatively movable toward and from one another, a single jacking lever, and operative connections for causing a continued movementof the lever t'o first relatively move the toe and heel poststo adjust the shoe upon the jack in a predetermined relation to the operating tool and to next clamp the shoe in its adjusted position;

3. A shoe supporting jack, having in combination, a toe post, a heel clamp arranged to engage with the heel seat of the sole, a last pin, and mechanism for actuating-the lastpin to simultaneously move opposite ends ofthe shoe into engagement with the toe post and heel clamp to clamp the shoe in the jack.

4. A shoe supporting jack, having, in combination, a toe post and a cooperating last pin for supporting a lasted shoe, a heel gage, and mechanism for successively moving the heel gage to contact with the heel portion of the shoe and move the shoe into engagement with the toe post, for locking the heel gage in this position, and for thereaftermoving the last pin to clamp the shoe in the jack.

5. A shoe supporting jack, having, in combination, a toe post, a last pin, a heel gage, and a single jacking lever constructed and arranged to automatically and successively actuate the heel gage to position the shoe in the jack and thereafter actuate the last pin to clamp the shoe in the jack.

6. A shoe supporting jack, having, in combination, a toe post, a last pin, means for yieldingly supporting the last pin, means for actuating the last pin to clamp thershoe upon the jack, and means for locking the last pin in position after the shoe is clamped upon the jack.

7. A shoe supporting jack, having, in combination, a toe post, a. last pin, means for yieldingly supporting the last pin, means for actuating the last pin to clamp the shoe upon the jack, and means actuated by the movement of the jack beneath the leveling device to lock the last pin in position.

8. A shoe supporting jack, having, in combination, a toe post, a heel gage, a jacking lever operatively connected with the heel gage and arranged to actuate the heel gage to move the toe of the shoe into` engagement with the toe post, and mechanism for locking the heel gage in positionk when further movement of the shoe toward the toe post is prevented.

9. A shoe supporting jack, having, in combination, a toe post, -a last pin, a jacking lever fulcrumed between its ends and operatively connected at one end with the heel gage to actuate the heel gage and move the shoe into engagement with the toe post, means for locking the heel gage in position, and means for thereafter causing the jacking lever to fulcrum about its operative connection with the heel gage Vto actuate the last pin and clamp the shoe uponY the jack.

l0. A shoe supporting jack, having, Vin combination, a toe post, a last pinY carrier, means for yieldingly supporting. the last Copies of this patent may be obtainedr for pin carrier, mechanism for rocking the carrier about the support, and mechanism actuated by the movement of the jack beneath the operating tool to positively lock the yielding support and rigidly support the last pin carrier.

11. A shoe supporting jack comprising a. toe post fulcrumed at itsV lower end,'a heel post, adjusting mechanism for causing a relative movement of the toe and heel posts, actuating mechanism for rocking the toe post about the fulcrum, and mechanism for controlling the reversal of movement of the actuating mechanism comprising a link, a

kpair of opposed stop members, and connections between the link and adjusting mechanism for varying the position of the link with relation to the stop members.

l2. A shoe supporting jack comprising toe and heel posts, adjusting mechanism for causing a relative movement of the toe and heel posts, a link, a pair of opposed stop faces inclined to one another and arranged to operatively engage with the link at predetermined intervals, and connections between the link and jack adjusting mechanisni to adjust the position of the link with relation to the stop faces and vary the time at which the link engages with the stop faces.

13. A shoe supporting jack comprising a last pincarrier, a slide rod supporting the carrier, a clamping member through which the rod passes, and mechanism for automatically locking the rod against movement relative to the clamping member to rigidly support the last pin carrier.

14. A shoe supporting jack comprising a last pin carrier, a rod supporting the carrier, a clamping member through which the rod passes, a cam, and mechanism actuated by the movement of the clamping member to operate the cam and lock the rod in the clamping member.

15. A shoe supporting jack, having, in combination, a toe post ulcrumed about its lower end, a heel post, and a heel clamp arranged to engage with the heel seat of the sole and fulcrumed about an axis located nearer to the sole than the axis of the toe post to cause the toe post and heel clamp to move'in different paths.

I YRTHUR ERNEST JERRAM.V

i Witnesses:

' kFREDERICK WILLIAM VORTII,

LEONARD WARWICK.

ive cents each, by addressing the Commissioner of VV'atentsr, `v Washington, D. G.

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