US2098366A - Leveling machine - Google Patents

Description

Nov. 9, 1937. E. E. WINKLEY LEVELING MACHINE Filed July 7, 1936 3 Sheets-Sheet l Nov. 9, 1937. w K 2,098,366

LEVELING MACHINE Filed July 7, 1936 3 Sheets-Sheet 2 Nov. 9, 19 37. w N 2,098,366 I LEVELING MACHIN-E Filed July 7, 1936 3 Sheets-Sheet 3 Patented Nov. 9, 1937 UNITED STATES PATENT OFFICE LEVELING MACHINE Application July 7, 1936, Serial No. 89,365

9 Claims.

This invention relates to machines for applying pressure to the bottoms of shoes, and is herein illustrated as embodied in a leveling machine of the typedisclosed in Letters Patent of the United v States No. 1,667,761, granted on May 1, 1928, upon an application of E. E. Winkley and H. A. Davenport, and in various Letters Patent therein re-.

ferred to, although itis to be understood that in its more general aspects the invention is not thus 10 limited in its applicability.

Machines of the above mentioned type comprise are also provided with automatic means for pressing the roll upon the shoe and for relieving the pressure at predetermined times in the cycle of operations of the machine to avoid excessive pressure at the ball of the shoe and for imparting to the leveling roll tipping movements of different extents laterally of the shoe to cause the pressure of the roll to be applied to the shoe at different inclinations when the roll is operating along the forepart and shank portions respectively so that these different portions will be properly leveled.

The present invention provides an improved construction such that in operating upon shoes of different styles, that is, shoes that differ in respect to the relative lengths of their forepart and shank portions, the relative positions of the shoe support and leveling roll are more precisely determined than heretofore each time in the movement of the shoe support when the pressure of the roll is relieved. Such accurate control of the relative positions of the shoe support and leveling roll renders the machine particularly well adapted for use p in operating on shoes characterized by a pronounced line or ridge extending across the soleat the ball of the shoe. The construction herein shown is such that for the, purpose in view the rate of movement of the shoe support may be adjustably varied when the roll is traversing both shoe in a predetermined cycle. Such machines obviates any danger that there may be of the pressure of the roll obliterating such a line or ridge on the sole. 'Moreover, since the roll is tipped at one inclination to the shoe bottom when operating along the forepart and at one or more different inclinations to the shoe bottom when operating along the shank, the inclination of the roll being changed at the time of pressure relief, assurance also is afforded that the pressure of the roll will be properly applied to all portions of the forepart and shank. It will be evident that the rate of movement of the shoe support may be thus varied without varying the entire extent of swinging movement imparted to the shoe support to cause the leveling roll to traverse both the forepart and shank which may be controlled as heretofore in accordance with the size adjustment of the jack.

The above and other features of the invention including various novel details of construction and combinations of parts will now be more particularly described by reference to the accompanying drawings and pointed out in the claims.

In the drawings, 7

Fig. 1 is a view in side elevation of a machine of the type disclosed in the prior Letters Patent hereinbefore mentioned, with the present invention embodied therein;

Fig. 2 is a view in rear elevation of the machine shown in Fig. 1;

Fig. 3 is'a section on the line III--III of Fig. 1;

Fig. 4 is a detail view of the cams for operating the mechanism for varying the rate of movement of the shoe support;

Fig. 5 is a plan view of the bottom of a shoe and illustrating diagrammatically the number and extent of relative swinging movements of the shoe support and leveling roll in operating on the bottom of the shoe; and

Fig. 6 is a diagram illustrating the relative timing of the cams which operate different parts of the machine.

Since the invention is illustrated as applied to a leveling machine of a well-known type only such parts of the machine as it is necessary to refor to for an understanding of the invention are shown and will be described in detail. It will be understood that the machine includes in its or-. ganization two sets of operating instrumentalities for operating on diiferent shoes in different locations in the machine and that each set comprises an automatically controlled leveling roll l0 and a shoe support or jack which, in the power operation of the machine, is moved automatically in directions lengthwise of the shoe to cause the roll to operate progressively along the bottom of the shoe. Each jack (Fig. 1) comprises a toe post l2 and a heel post it which are pivoted together at l6 for relative adjustment for shoes of different sizes by means of a threaded adjusting rod [8 which moves the heel post toward or from the toe post so that the toe ends of shoes of different sizes will be presented substantially in the same relation to the roll Hi. The jack as a whole is operatively movable about the axis of a shaft 26,.on which the toe post is mounted, to carry the shoe forwardly and rearwardly under the leveling roll. In these respects the construction shown is similar to that disclosed in Letters Patent of the United States No. 1,239,664, granted on September 7 at 25 (Fig. l) on the frame of the machine for I swinging movements in a vertical plane to press the'roll is upon the shoe andto relieve the pressure at different respective timesin the operation of the machine. 1T0 cause the roll to operate along the bottom of the shoe the jack is swung about the axis of the shaft 20 by power-operated mechanism comprising a path cam-26 formed in one face of a cam wheel 28 ona cam shaft 36 and connections from the cam 26 to the jack which will presently be described. Generally speaking, the cycle ofoperations cornp'rise's first a movement of the jack to cause the roll to traverse the shoe from the toe end to the heel seat, then a plurality of backward and forward movements 35.while the roll is operating in the shank, thereafter a movement to cause the roll to return to the toe end along one side and then to traverse the shoe from the toe to the heel seat along the opposite side followed by aplurality of backward and forward movements to cause the roll to operate in the shank at that side and, finally,a movement to cause the rollto return to the toe and to leave the shoe. As the roll is thus operating upon the opposite sides of the forepart and shank portions of the shoe, tipping movements of different extents are imparted to the roll to cause the pressure of the roll to be applied to the forepart and shank portions respectively at different inclinations properly to level them. 7

The shafts 23 are rocked in the roll carriers 24 to impart to the leveling rolls their tipping movements by mechanism which is substantially the same as that disclosed in Letters Patent No. 889,287, granted June 2, 1998, upon an application of mine. Fast to the rear ends of the shafts 23 substantially in vertical alinement with the axis 25 of the roll carriers are segments 32 (Fig. 2) engaging rack bars 34 which are connected together by a pinion (not shown) for equal movements in opposite directions. Connected to one of the rack bars St is a link 86 pivotally connected to a block 38 slidably mounted in a-curved slot 40 formed in a crank arm 42 fast to a shaft 44 to which there is secured an'arm 33 connected by a link 38 to a lever stung. 2) pivotally mounted on the frame of the machine and carrying a cam roll 52 engaging a path cam 5 formed in the opposite side face of the cam wheel 28. The shape of the'cam 5 3 is such that tipping movements of different extents are imparted to the leveling roll'in operating upon the forepart and shank portions respectively of the shoe bottom. For varying the extent of tipping movement imparted to the leveling roll as the different portions of the shoe bottom are acted upon successively by the roll there is provided. as more fully shown and described in the above-mentioned Letters Patent No. 889,287, four wing cams 56 (Fig. 2) which are controlled from the front of the machine by suitable adjusting mechanism and are operated by a set of fly cams (not shown) on the cam shaft 38. The wing cams 56 engage a roll 58 supported by the downwardly extending arms 60 of a bell-crank lever. having a substantially horizontal arm 52 connected by a universal joint to the right-hand end of the link 36, the construction being such that by adjusting the positions of the wing cams the position of the block 38 in the curved slot 40 of the crank arm 42 may be varied to vary the effective length of the arm 42 and thus to vary the amount of tipping move-ment imparted to the roll ID as the roll traverses the forepart and shank portions respectively of the shoe bottom.

In the course of the cycle of operations the pressure of the roll on the shoe is controlled through a spring '64 (Fig. 1) by means including a cam wheel 66 fast on the cam shaft 30.

lever 68 which is pivoted at 10 on the-frame of the machine and is connected bya link "to the roll carrier 24. Forcontrolling the spring thereis provided a lever arm 14 fast on a rockshaft,

16 which has also fast thereon an arm 18 connected by a link 86 to a lever 82 pivoted-at 84 on the frame of the machine and provided with a roll 86 in engagement with the periphery of the cam wheel 66. The lever arm 14 is arranged to bear on ears 88 formed on opposite sides of a sleeve member 98 which is slidingly movable in a holder 92 on theframe of the machine and engages the upper end of the spring 64. The cam wheel 65 is so formed as to vary the pressure "of the roll on the shoe in the same general rela tion to the cycle of relative movements of'ithe leveling roll and the jack as heretofore. Thatis to say, the cam wheel is provided with a cam '94 for applying the pressure first at the forepart of the shoe, with a depression 95 corresponding to the first relief of pressure at the ball line, a cam 98 for'applying pressure while :operating'at one side of the shank,'a depression: I00 corresponding to the relief of pressurein returning over the ball line, a cam I02 for applying the pressure in operating forwardly over the forepart at one side and in returning along the forepart at the other side, a depression I04 corresponding tothe first relief of the pressure at the ball line on that side, a cam N35 for applying the pressure in operating on the shank at that side, a depression H18 corresponding to relief of the pressure in returning over the ball line, a cam H0 forapply ing pressure again at the forepart, and a final. depression I [2 corresponding to relief ofthe pressure as the roll leaves the shoe at the toe and also at the beginning of the cycle of operations at the toe of the next shoe, It will be understood that the time in the cycle of the machine whenthe tipping of the roll-takes place is controlled-by the cam 54 and that the amount of tipping movement imparted to the roll by the cam 54 maybe varied by adjustment of the wing cams 56. Accordingly, each'time in the cycle when'the pressure of the roll is relieved the 'crank-arm' 42 is swung to impart to the roll itstipping'movement so that when the pressure of the .IOlliS again fully applied'to the shoe by the action of the cam wheel 66 that portion of the shoe which is being operated upon by the roll will be properly leveled.

For imparting to each jack its swinging move-. ments there is provided power-operatedmecha-- 2,098,366. nism which is, for the most part, substantially the same as similar mechanism disclosed in Let.- ters Patent of the United States No. 1,011,301,

granted on December 12, 1911, upon an applica-v vided with a forwardly extending arm :I I8 hav ing an arcuate slot. I20 formed therein. Slid ably mounted in the slot I20 is a block I22 which is connected by a link I24 to a-block I26 slidably mounted in an arcuate slot I28 formed in an arm I30 which is fast to a rockshaft I32 mounted in the frame of the machine. ".Between' its ends the link I24 is pivotally connected to a supporting arm I34 connected to the frameof the machine. It will be understood that the link I24 is connected to mechanism for swinging it about its pivotal connection to the arm I34 in response to the movement of'the heel post I4 toward or from the toe post I2 to vary the effective lengths of the arms II8, I30 and thus to vary the extent of swinging movement imparted to the jack in accordance with variationsinthe size adjustment of the jack. Fast to the rock-'- shaft I32 is an arm I36 which is connected by means of a link I38 to an arm I40 pivotally connected at I42 to the machine frame. Pivotally connected to the upper end of the arm I40 is a bell-crank lever I44 having an upwardly extending arm I46 carrying a roll I48 arranged to engage the cam 26, and a rearwardly extending arm I50 connected by a link I52 to one arm of .a lever I54 loosely mounted on a shaft I56 supported by suitable bearings in the frame of the machine. The lever I54 has a forwardly extending arm I58 (Fig. 3) located between bosses I60, I62 on the lower ends-oflinks I64, I66 respectively. The links I64, I66 are pivotally connected at their upper ends to blocks, one of which is shown at I68 (Fig. 1), each block being'slidably mounted in a dovetailed arcuate slot I12. The slots I12 are formed respectively in arms I16, I18 (Fig. 2) which are pivotally mounted on the frame of the machine for swinging'move-.

ments about a common axis I80. The arms I16, I18 are provided, respectively, with upwardly extending portions I82, I84 carryingcam rolls I86, I88 arranged to engage cam paths I90, I92 formed respectively in the opposite side faces of a cam wheel I94, fast to the cam shaft 30 (Figs. 2 and 4). Slidably mounted in a transverse recess in the forward end of the arm I58 of the lever I54 (Fig. 3) is a coupling pin I98 which may be moved longitudinally to engage alternately the boss I on the lower end of the link I64 in a recess 200 in the boss and. theboss I62 on the lower end of the link I66 in a recess 202 in the boss, the lower end of each link I64, I66 being connected to the shaft I56 by a link 204Ifor movement on an arc concentric with the arc of movementof the pin I98. For moving the pin I98 into engagement either with the boss I60 in the recess 200 to connect the cam I90 through the arm I16 and link I64 to the lever I54 or with thegboss I62 in the recess 202 to connect the cam l92 through the arm I18 and link I66 to the lever I54 there is provided mechanism which is substantially the same as that shown in'the. above-mentioned Letters ,Patent No. 1,011,301,

this mechanism being controlled by a cam path 206 formed in the cam wheel I94 (Fig.2)-

link 208 (Fig. 1) which extends forwardly and is pivotally connected to a block 2I0 at the front of the machine. Extending through each block 2I0 is 'athreaded adjusting rod 2I2 which is rotatably mounted in a casing 2I4 supported by the frameof the machine and is held against length-- wise movement in the casing by collars 2I6 fast to -the;rod-j2l2., Each rod has its end portion.

formedto. receive a wrench or crank by means Pivotallyconnected to each link I64, I66 is a of which the rod may be rotated to impart lengthblocks I68 in the arcuate slots I12 in the arms It will be evi- I16, I18 and thereby to vary the effective lengths ofthese arms.

Itwill be understood that the rearward and forward swinging movements above described are imparted to the jack by the cam 26 to cause the roll I0. to traverse the forepart and shank portions of the bottom of the shoe and that the extent of these movements may be varied by varying the size adjustment of the jack. It will alsobe understood that the time or times in the cycle when the pressure relief occurs are determined precisely by the shape of the cam wheel 66. Thenumber of relative movements of the jack and leveling roll in directions lengthwise of the shoe are indicated diagrammatically in Fig.

5 by a line 2 I8. This line indicates by its lateral separations the direction of tipping movement imparted to the roll in operating along the forepart and shank portions of the shoe first at one side and then at the other side of the shoe bottom.:--j The machine as thus far described is sub- 7 stantially as shown in the previously mentioned;

prior Letters Patent. 7 j

For purposes of this invention the cams I90, I92 are so shaped as to impart to the bell-crank lever I44 through the arms I16, I18, adjustable links I64, I66, lever'I54 and link I52 swinging movements in time relation to the swinging of the arm I40 by the cam 26 the extent of which may be varied by adjustment of the links I64, I66 to vary the rateof relative movement of the jack and roll I0 and thereby to control their relative positions at each time inthe cycle when the pressure of the roll is relieved. By thus shaping, the cams I90, I92 the relative positions of the shoe and roll when the pressure is relieved may be precisely determined in operating on shoes of different styles in each swinging move ment of the jack instead of as heretofore only,

after the jack has completed its rearward swinging movement in'each half of the cycle of operations of the machine. In operating upon shoes, forexample,v having a pronounced line or ridge across the sole at the ball of the shoe, such control of the shoe obviates any danger that there may.

otherwise be of the'pressure of the roll obliterating this line or ridge. Moreover, since the roll.

is tipped relatively to the shoe for operating either in the shank or along the forepart depending upon the direction of swinging movement of the shoe support relatively to the roll, not only willall portions of the forep'art'and'shankbe properly leveled butthere will be a tendency for the leveling roll to accentuate such a line orridge on the sole at the ball of the shoe. It will be understood that during the first .half of the cycle thecoupl'ing pin I98 (Fig. 3) is in engagementwith the link I64 which is adjustably connected to' the arm I16 controlled by the cam I90, and that during the last half of the cycle the coupling pin is in engagement with'the link I66 adjustably connected to the arm I18 which is controlled by the cam I92, thus permitting thelinks "I64, I66 to be adjusted independently of each other-to vary the rate of movement of the shoe support to take care of variations in thelength of the forepart and shank portions-at the opposite sides of the shoe bottom. The shape ofthe cam I90 (Fig. 4) is such that as the arm I40 is'swung by the cam 26 in a counterclockwise direction (Fig. 1) to impart to the jack its rearward swinging movement to cause the roll I to traverse the bottom of the shoe from' the toe endto the heel breast line, the bell-crank lever I44 is ordinarily swungrelatively to the arm I40 first in a counterclockwise direction and then to the same extent in a clockwise direction. The shape of the cam'26 is such "as'to accommodate shoesof a style having the longest forepart and shortest shank portion on which the machine is intended to operate. Accordingly, in operating upon shoes of other styles such counterclockwise swinging movement of the bell-crank lever I 44 relatively to thearm I 40, the'amount of which is determined by adjustment of the links I64, I66, causes the jack to be swung rearwardly at a lower rate of speed than if the bell-crank lever I44 had been held in fixed relation to thearm I40. Such counterclockwise swinging movement is imparted to the bell-crank lever I44 until 'the time when the roll 86 engages the cam 66 in the depression 96 to relieve the pressure of the leveling roll I0 on the bottom of the shoe. At this time the roll I88 is at the point a in the cam path 'I'90 (Fig. 4) Thereafter as the jack continues to swing rearwardly the bell-crank lever I44 is swung relatively to the arm I40 in a clockwisedirection to cause the jack to be swungat a greater rate of speed, the shape of'the cam' I90 being such that the bell-crank lever I44 is returned to its initial position substantiallyatthe time when the roll I0 reaches the heel breast line. As the jack is then swung forwardly and rearwardly to causethe-roll I0'to operate'in the shank portion of the shoe the' bell-crank lever I44 is swung relatively to thearm I40 first in a counterclockwise direction and thenin a clockwise direction in time relation to the swinging :movements of the arm I40, thus'increa'sing the rate of speed of the jack, after which, 'as the jack is swung forwardly by the arm I40 to return the roll to the toe end of the shoe, the bell-crank lever I44 isr'swung in a counterclockwise direction to increase the. rate of speed .of the jack until the time of the relief of pressure 'ofzthe leveling roll I0 by the engageme'ntof the roll 86 with thecam 66 in the depression I00. Atfthis time the roll I88 is at the point b .in the cam path I90 (Fig; 4). Thereafter the bell-crank lever I44 is swung in a clockwise direction :rela tively to. the arm I40 .in its initial position substantially-"at thetime when the roll I0.treaches the toe end, thus causing the jack tolbe swung at :a lower .rate of speedas the rollltravers'es theshoe bottom "from the ball .line forwardly 'to' I thetoe end.. .Is' will be understood thatswingingirnovements in time relation to the swinging of thearm I40 similar to those above-described are imparted-to the bell-crank lever I44 by the cam lfizlas'the leveling roll I0.is operating along the :opposite :sidecof. the forepart iand shank portions iOf' the shoe bottom in the last half of the cyclezof operations of the machine. It will also be understoodthatbyiadjusting the positions of the links .=I6'4, I66tovary the efiective lengthsof the-arms I16, I18, swinging movements of greater OlflBSSifiXtEI'lt may be 'impa'rtedzto the bell-crank lever I44. to varythe rate ofrelative. movement of the jackand leveling .roll in operatingupon shoes of different styles. From the above descriptionit will be evident that since the directionof swinging movement imparted to the bell-crank lever 144 is changed each time in the cycle when the pressure of the leveling roll I0 is relieved in traversing'the ball line, by varying the extent of swinging movement imparted to the bell-crank lever =I44 to vary the rate of relative movement of the jack and leveling roll when the roll is traversing both the forepart and shank portions, thei-time'when the pressure relief of the leveling roll takes place may divide the entire length of swinging movement of the jack into two movements of. any desired .ratio. In operating upon shoes ofdifierent styles, that is, shoes that difier in respect to the relative lengths of their forepart and shank portions, the relative positions of the :jack and leveling roll may be thus controlled to position each shoe with its ball line under the roll I0 at each time when the pressure of the roll isrelieveda It will be evident that since 'the bell-crank lever I44 is returned to its initial .positiontat the end of each rearward and each forward swinging movement of the jack to causethe roll to traverse the shoe bottom from the toe end to the heel breast line-and from the heel "breast-line to-the toe end, the rate of relative movementof the jack and roll maythus be varied to determine adjustably the position 'of the jack relatively to the roll at each timewhen'the pressure of the roll on the shoe is relieved without varying the entire length of swinging movement imparted to the jack which may be variedas heretofore to accommodate shoes of difierent sizes by varying the size adjustment'of the jack. The relative timing of the camsior' operating the shoe support and the leveling roll is illustrated diagrammatically in Fig. 6.

laHaving described the invention, what I claim as new andadesire to secure byLetters Patent of the United States is:

1. A leveling machine having, in combination, a shoe "support, a' leveling roll, means for effecting relativeimovement of said shoe support and leveling roll in directions lengthwise of the shoe to :cause the leveling roll to operate along the bottom of the-shoe, means for pressing the roll uponithe shoe and for relieving the pressure at predetermined times in the cycle of operations of themachine, and means for varying the rate ofrela't'ivemovement of the shoe support and levelingroll in operating'upon both the forepart and shank to control their relative positions at each and every :timein the cycle when the pres sure of the roll is relieved'in operating on shoes oftdiiferentlstylles.

1E2. A leve'ling 'machine having, in combination, a fleveling'roll, a shoe support mounted to swing rearwardly and forwardly ibeneathxsaid leveling roll to cause: the roll to operate along the bottom of a shoeion said support, means for pressing.

the roll upon the shoe and for relieving the pres:

sure at predetermined times in each cycle of,

operations of the machine, means for imparting to the shoe support its rearward and forward swinging movements, and cam means arranged to act through said last-named means to control variably the relative positions of the shoe support and the roll at each and every time in the cycleof the machine when the pressure of the roll is relieved:

3. A leveling machine having, in combination, a leveling roll, a shoe support mounted to swing rearwardly and forwardly beneath said leveling roll to cause the roll to operate along the bottom of a shoe on said support, means for pressing the roll upon the shoe and for relieving the pressure at predetermined times in each cycle of operations of the machine, means for imparting to the shoe support its rearward and forward swinging movements, and means for adjustably varying the rate of movement of the shoe support when the roll is traversing both the forepart and shank portions of the shoe bottom to cause the relief of pressure to occur when the roll is located substantially at the junction of the forepart and shank in operating on shoes of different styles. 7

4. A leveling machine having, in combination, a shoe support, a leveling roll, means for effecting relative movement of said shoe support and leveling roll in directions lengthwise of the shoe to cause the leveling roll to operate along the bottom of the forepart and shank portions of the shoe, means for imparting tothe roll tipping movements laterally of the shoe at predetermined times in the cycle of operations of the machine, and means for adjustably varying the rate of relative movement of the shoe support and level ing roll when the roll is traversing both the forepart and shank portions of the shoe bottom to cause the tipping of the roll to occur when the roll is located substantially at the junction of the forepart and shank in operating upon shoes of different styles.

5. A leveling machine having, in combination, a leveling roll, a shoe support having heel and toe posts relatively adjustable to accommodate shoes of dilferent sizes, means for effecting relative movement of said shoe support and leveling roll in directions lengthwise of the shoe to cause said leveling roll to operate along the bottom of the shoe, said last-named means being constructed to vary the entire extent of said relative movement in accordance with variations in the relative positions of the heel and toe posts, means for pressing the roll upon the shoe and for relieving the pressure at predetermined times in the cycle of operations of the machine, and means for adjustably varying the rate of relative movement'of the shoe support and leveling roll in operating upon both the forepart and shank to control their relative positions each and every time in the cycle when the pressure of the roll is relieved in operating upon shoes of different styles without varying the entire extent of relative movement of the shoe sup-port and leveling roll lengthwise of the shoe.

6. A leveling machine having, in combination, a leveling roll, a shoe support mounted to swing rearwardly and forwardly beneath said leveling roll to cause the roll to operate along the forepart and shank portions of the bottom of a shoe on said support, means for pressing the roll upon the shoe and also for relieving the pressure at each time in the movement of the shoe support when the'roll is at the junction of theforepart and shank portions of the shoe bottom, means for imparting to the shoe support its rearward and forward swinging movements, and means for adjustably varying the rate of movement of the shoe support when the roll is traversing'both the forepart and shank portions of the shoe to vary the amount of the relative'movement of the roll and support prior to each relief of pressure of the roll in accordance with variations in the lengths of the forepart and shank portions of shoes of different styles.

7. A leveling machine having, in combination, a leveling roll, a shoe support mounted to swing rearwardly and forwardly beneath said leveling roll to cause the roll to operate along the bottom of a shoe on said support, means for pressing the roll upon theshoe and also for relieving the pressure at predetermined times in the cycle of operations of the machine, means acting in time relation to said last-named means for imparting to said roll tipping movements of different extent laterally of the shoe to cause the roll to operate along the opposite sides of the shoe bottom, means for imparting to the shoe support its rearward and forward swinging movements, and different mechanisms arranged to act alternately through said last-named means to determine the rate of movement of the shoe support when the roll is traversing both the forepart and shank portions at the opposite sides of the shoe bottom to cause the rearwardly and forwardly beneath said leveling roll to cause the roll to operate along the bottom of the forepart and shank portions of a shoe on said support, a cam, connections between said cam and said shoe support for imparting to said support its swinging movements including a pivoted arm arranged to be swung in one direction by said cam to impart to said support its rearward swinging movement and to be swungin the opposite direction to impart to said support its forward swinging movement, means operating in time relation to the swinging movements of said arm for pressing the leveling roll upon the shoe and also for relieving the pressure of the roll on the shoe, and mechanism operating in time relation to said last-named means for im parting to said pivoted arm independently of said cam swinging movements of variable extent in opposite directions to vary the rate of swinging movement imparted to said shoe support when the roll is traversing both the forepart and shank portions of the shoe to control the relative positions of the shoe support and roll each and every time when the pressure of the roll is relieved in operating upon shoes of different styles.

9. A leveling machine having, in combination, a leveling roll, a shoe support mounted to swing rearwardly and forwardly beneath said leveling roll to cause the roll to operate along the bottom of the forepart and shank portions of a shoe on said support, a cam, connections between said cam and said shoe support for imparting to said ward swinging movement'and to be swung in the opposite direction to impart. to said support its forward swinging movement, means operating in time relation to the swinging movements of said arm for pressing the leveling roll upon the shoe and for relieving the pressure, of'the roll on the shoe, and mechanism for adjustably varying the rate of swinging movement imparted to said pivoted arm by said cam without varying the extent 10 of its swinging movement to vary the rate of ERASTUS E; INKLEr. m

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