US1057607A - Lasting-machine. - Google Patents

Description

E. E. WINKLEY.

LASTING MACHINE.

APPLICATION FILED my a, 1911.

Patented Apr. 1, 1913.

3 SHEETSSEEBT 1.

' E. E. WINKLEY. LASTING MACHINE.

APPLIOATION FILED MAY 3, 1911.

Patented Apr.1,1913.

E. WINKLBY. LASTING MACHINE. APPLICATION FILED MAY 3, 1911 1,057,607 Patented Apr. 1, 1913.

3 SHEETS "SHEET 3v in the operation by hand.

ing to be a'tull, clear,

carnri'r ora ion EEASTUS E. l/VINKLEY, 0F LYNN, MASSACHUSETTS.

LASTING-MACHINE.

Application filed May 3, 1911. Serial No. 624,724.

Specification of Letters Patent.

T 0 all whom it may concern:

Be it known that it, EnAs'rUs E. WINKLEY, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certain new and useful improvements in Lasting-Machines; and I do hereby declare the followand exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in lasting machines and more particularly to that type of lasting machines commonly known as the hand method lasting machine.

it is desirable in lasting the better grade of shoes and in lasting shoes in which the pulling over operation has been ineiiiciently performed, for the operator, in order to properly last the'shank, to perform this step A spindle is commonly provided upon the bench at one side of the machine and prior to lasting one side of the shoe, the operator will spindle thelast, seize the margin of the upper with hand lasting pincers, at a point about opposite the ball of the last, and will then draw on the upper with a slow steady pull in a direction toward the heel and across the instep, such a pull being necessary to properly draw the upper at the instep to the Wood. Considerable more strength is requiredat this point to draw the upper to the wood than is necessary at the fore part, owing to the increased friction between the last and the upper and the shape of the last at this, point. The upper at this pointis generally slack and stands out from the body of the last owing to the sharp inward curvature of the last at the shank and a sharp quick pull which is sulliciont to properly draw over the uppcr'at the ball of the last, would noteitectually draw over the upper at this point. After having thus-stretched the upper and drawn it to the wood it is held tightly in place by the operator until the first tack has been driven by the machine at about the ball of the last. After one side of the shoe has been lasted, the last is again spindled, the margin of the upper at the opposite side of the ball of the shoe is seized by hand pincers at theinstep and the upper is drawn lasting machine embodying this parth to the Wood by stretching it over that side of the ,last. A-tack is driven at this point and the remainder of the upper upon this sideof the shoe is then lasted as before.

It is the object'oi this invention to pro-- vide means in a hand i'nethod lasting ma" chine for increasing the strength of the pull to of the pincers at any desired point in the lasting operation, such, for instance, as at the shank. In the preferred form oi: the invention, it is applied to a hand method lasting machine constructed in accordance with a. prior invention of the present invcn'- tor, in which provision is made for imparting to the pinccrs, at times, a slow pul movement of increased length. It sho understood, however, that the presei vcntion is not limited in its application to feature, but is useful in connection with ordinary type of hand method lasting chines, such, for instance, as is disclosed in the United States l ietters Patent to S. Ladd, No. 597,321, dated January 11, 1.898.

In accordance with this object, the inven tioncomprises means operated by the machine to vary the strength of pull of the pin-- cers when they are operating to pull the upper at the shank. lin the best form of the invention now known to the inventor, an a iXiliary spring is provided-Which is adapted to reinforce the usual spring for trans mitting a yielding pulling movement to the pincers. liteehanism, under control of the operator, is provided for throwing the an iary spring into operation and it is returned to its inoperative position automatically. W hen the present invention is applied to a lasting machine, having means for imparting a slow pulling movementto the pincers, the speed reducing mechanism is conveniently used to throw the auxiliary sprii into its inoperative position. in this l the automatic return of the machine to 1 normal speed. automatically returns yielding pincer operating mechanism 'tqlts normal tension: While in the illustrated embodiment of the invention the variation in tension is operative during but a single pulling movement, in its broader aspects the invention is not limited to this particular mode of operation.

To the accomplishment of the object above ing pulley broken away; Fig. 3

lasting machine with the pres nt invention applied thereto; Fig. 2 repre ant s a righthand elevation of the machine shown in Fig. 1, with the upper portion of the drivis a detail of the operating mechanism for the work support; Fig. 4 is a section upon the line 4-4 of Fig. 3; Fig. 5 is an end elevation 'of the Work support shown in Fig. 3; Fig.

6 is a longitudinal section through the main driving pulley and shaft; Fig. 7 is a section upon the line 7--7 of Fig. 6; Fig. 8 is a sectional view taken from the line 88 of Fig. 6 and showing a detail of the clutch which is employed; and F ig.9 is a detail showing the cage or retaining ring emproyed for holding the rolls of the clutch in ace. I The present invention is preferably illustrated in connection with a machine of the type shown and described in United States Letters Patent to S. W. Ladd,

No. 597,321, dated January 11, 1898, to which reference has' been made. The shoe isoperated upon'in this type of machine 'by holding the last bottom upward against the bottom rest 1. The margin of the upper of the shoe is then grasped by a pair of movable pincers 3, which, after securing a firm hold on the upper, are moved first upward and then inward toward the center line of the sole to draw it uniformly and evenly to the body of the last. The upper is. then held.in'this position by the pincers while the tacker mechanism 4 drives a tack through the upper andsecures it in position at this point, the tack held by a tack block 2. This mode ofoperation is old and well known in the art; as may be seen from an inspection of. the patent to S.-W. Ladd hereinbefore referred to, and forms no part of the present invention. In all previous hand method lasting machines, however, in order that the upper may be properly drawn to'thewood across the instep, it has been necessary, when lasting the shank of a shoe, to spindle the last and to perform this port-ion of the operation withcare'by hand. This is due to the fact that the pincers, 'in order to properly draw the upper to thebody of the last at the start, must have a stronger and slower relative overdrawing movement than is provided by the ordinary pincer operating mechanism or than is needed in lasting the upper at the ,forepart of the shoe.

In the present machine mechanism is provided for giving a relatively slow and strong movement to the pincers when drawing over the upper of the shoeatthe shank, as it" is found that this movement draws the upper to the wood more'tightly and evenly than would be possible with the normal movement of the pincers which is employed in drawing over the forepart of the shoe.

In some cases when the shoe comes to the lasting machine the upper is, slack at the shank 'andtherefore the margin of the upper does not project beyond the plane of the sole as it should. In other cases the upper stands out'from the body of the last at the shank owing to' improper pulling over and other causes well known to those skilled in the art. In either of these or similar cases when the shoe comes from the puller-over with the upper improperly positioned at enable the pincers to properly seize the margin of the. upper at this point as the 'pincers'ordinarily would not have the requisite movement necessary to reach the upper if the shoe were held in its normal position. In order to overcome this difiiculty an auxiliary mechanism has been provided for moving the usual bottom rest upward to enable the shoe to be raised to-a posi-' tion where the marginof the upper may be seized properly by, the pincers. The mech anism for moving the bottom'rest operates preferably in conjunction with the mechanism for giving a slow movement tothe pincers but these mechanisms may be disconnected and allow the bot-tom rest to be held continuously in a stationary position when so desired.

It is not desired, of course, to affect the normal speed and operation of the lasting machine during the lasting of the ball and toe of'the shoe, and to this end the mechanism for securing a slow strong movement of the pincers and. operating the bottom" rest 1s conveniently thrown into operation by a hand lever 5 which is attac'hedto one end of a rock shaft 6 mounted in brackets 7 upon the frame of the machine. The rock shaft '6 upon being oscillated, slides the cam roll 8 and arm 9 mountedupon the shaft 10 longitudinally in the supporting bracket 11. The cam roll 8 engages with a plate cam 12, but it will be noted that the cam 12 comprises an outer circular surface 13 and an inner cam path 14. .The cam roll, in the normal operation of the machine, ordinarily travels against the outer surface 13 and no movement is imparted thereto, but

upon movement of the hand lever 5 by the operator the cam roll '8 is moved inwardly and engages in the cam path 14. The mechanism by which motion is transmittedfrom the rock, shaft 6 t0 the shaft 10 to move the same longitudinally conveniently comprises an arm 16 sleeved to the outer end of the shown in Fig. 1, upon the face of the lever iggntacting With the arm 9.'

The preferred form of the path cam is one similar to that illustrated, in which the cam produces an initial movement of the various mechanisms by engagement of the cam roll with the inclined portion 21 of the cam path, the cam path being next provided with a dwell 20 during which the parts are held in the position to, which they have initially moved, the cani roll being then returned toeits original position by the portion 19 o'fthe cam path, restoring the mechanisms tv their normal position. Phe movement the cam roll by the cam accomplishes two distinct results. Upon engagement of the cam roll 8 with the portion 21 of the cam path, the bottom rest 1 is moved upwardly and over a certain predetermined amount, and at the same time the driving mechanism for moving the pincers is auto matically regulated to secure a slow movement of the pincers. While the cam roll 8 travels through the portion 20 of the cam path, the bottom rest 1 is held in its raised position and the pincers 3, having grasped the upper, are retracted with a slow move ment. Simultaneously with the pincers reaching the limit of their upward movement the cam roll engages with the portion 19 of the cam path, and the bottom rest 1 is moved down and back to its normal position, securing a further drawing over of the upper of the shoe, at the same time the slow speed is automatically thrown out.

It is considered desirable to automatically rcturn'the cam roll 8 to its normal position in contact with the surface 13 of the cam 12,

y and to this end a projection 12- is formed upon the edge of the cam 12 contacting with the arm 9 and moving it outwardly upon engagement therewith. With this arrangement the mechanism for securing a slow movement. of the pincer-s will only be operative during one revolution of the drive shaft unless the operator again moves the hand lever 5. The bottom rest 1 is slidably mounted for longitudinal movement in a box 22 and is provided upon its upper face with a toothed rack 23 which engages with an oscillatory toothed segment 24. The bottom rest 1 and supporting box 22 are mounted upon a cross-head 25, which slides in vertical ways 26 in the frame. A vertical movement is given to the cross-hcad 25 by engagement of an oscillatory toothed segframe is slotted at 28 and the rack projects therethrough to prevent twisting movement of the cross-head. The segment 27 is fixedly mounted upon a rock shaft 29 which is mounted in brackets 30 secured to the frame of the machine. The rock shaft 29 is operated upon movement of the cam roll 8 through a train of mechanism comprising an arm 31 fixed upon the outer end of the rock shaft 29 and'having a link 32 pivotally connected to its free end. The link 32 is pivotally connected at its lower end to a slotted segment 33 which is fixed upon one end of a shaft 34. In order that the oscillatory movement of the shaft 29 may be varied, and, if so desired, may be entirely discontinued, the curved segment33 is attached to the shaft 34 by means of a yoke 35, and the link 32 is adjustably secured to the segment 33 by 'a bolt and nut' 36. The yoke movement will be communicated to the link 32 and rock shaft- 29. The value'of this feature will be appreciated when it is considered that in operating upon many kinds of shoes it is desired to secure only the slow movement of the pincers and not the additional movement of the bottom rest which can be easily retained in locked position and hold the laststationary while being operated upon by the pincers.

The rock shaft 34 is oscillated upon move ment of the arm 9 through a system of link ages comprising an arm 37 mounted upon the hub of the arm 9 and movable therewith. The arm 37 has a link 38 connected to, its free end and the link 38 is connected through a universal joint 39 and a short rod 40 with the pivotal point 41 of a toggle. The arm 42 of the toggle is formed integral with a sleeve 43 which is loosely supported upon the shaft 6. The sleeve 43 has an arm 44 fixed thereto and extending from the side opposite the arm 42. The arm 44 oscillates the shaft 34 through a link45 connected to its free end and the arm 46 which is fixed to the shaft 34. The opposite arm 47 of the toggle is connected at its free end to a lever 48 pivoted at its central point on the frame of the machine and engaging at its upper end the head of a bolt 49 which is normally held inward by a coiled spring 50 bearing against a nut 51 at one end and hearing at its opposite end against a projecting lug 52 formed upon the band 53 of a friction brake mounted upon the main drive shaft 54 of the machine. A movement of the cam roll 8 and arm 9 will thus operate through the toggle to oscillate the shaft 29 and move same time rock the lever 48 about its pivotal I point, moving theupper end outwardly,

- pressed pin 61 is provided, the end of which compressing the sprin 50 to tighten the brake band 53'a'nd' apply the friction brake. The movement of the rest 1 due tothe oscillation of the shaft 29 will continue in a vertical direction until the free end 55 of an arm 56 contacts with the upper Wall of the recess 57 into which the arm 56 projects. When the end of the arm 56 is stopped from further movement in a vertical direction, the continued upward movement of the crosshead 25 will result in oscillating the toothed segment 24 which is integral with the arm 56 and pivotally mounted at 58 in the cross head 25. The oscillation of the segment 24 will withdraw the rest 1 in the box 22 against theaction of the spring 59 which is fastened at one end to the box and at the other end to a portion of the rest 1. pen the oscillation of the shaft 29 in the, ieverse direction the spring 59 will'retain the free end of the arm 56 against the upper wall of the recess 57 until the rest has been forced the rest 1 shall be positively forced over into its proper position before the tack is driven into the last. It will now be seen that in ad dition to the upward and overdraw movement of the pincers, there is also the movement of the bottom rest back to its normal position, which is just the reverse of the upward movement of the pincers, so that the result is an increased drawing over ofthe upper at this point. In order thatthe rest shall be locked and held rigidly in place during the tack driving operation, a spring projects into a hole in the side face of the rest 1 when in its normal position. The pin 61 is mounted in a slot in the frame of the machine, and is normally forced inward by a coiled spring 62'. In order that the bottom rest may be released upon its upward movement, avertical forked finger 63 is bolted to the side'of the cross head slide 64, and has a wedge-shaped lower end 65 engaging with r the head of the pin 61, so that upon upward cured upon tightening the brake band 53,

and it will be seen that this is coincident with the upward movement of the rest 1 and that the slow movement will continue during the time that the rest is maintained in its raised position. Under normal conditions the drive shaft 54 will be driven directly from the drive pulley 66 when the brake band 53 is loose.

grallyupon one end thereof. A second sleeve 69 is mounted loosely upon thesleeve 67 and has a gear fastened thereto. The, gears 68 and 70 mesh respectively with the gears 71 and 72, keyedtogether and rotatably mounted upon a radial arm of the drive pulley 66. The gears 71 and 72 have a different number of teeth and will tend to drive the gears 68 and 70 respectively at different speeds. The sleeve 69 has a series of radial projecting arms 73 upon the outer ends of which is fastened the gear 70. These arms 73 of the sleeve 69 form a portion of what is commonly known as a Horton clutch, and a ca e or retaining ring 74 is loosely suppcrte upon the sleeve 69 and provided with a series of longitudinally projecting arms 75 which project between the arms 73 of the sleeve 69. The portions of the sleeve 69 between the arms .73 and projecting beyond the same are slightly flattened, as shown clearly in Figs. 7 and 8.

'The arms 75 of the retaining ring 74 are provided with recesses 76, in which are held balls or rolls 77. As the driving pulley 66 and gears 71 and 72 are revolved, the gears 68 and 70 will tend to revolve at different speeds, the gear 70 rotating faster than the gear 68, and as the brake band 53 is normally loose, the retaining ring 74 will be allowed to rotate freely and the arms 75 of the retaining ring 7 4 will be moved by the radial arms 73 relatively to the gear 68, wedging the balls 77 between the surface of the sleeve 69 and the inner'flanged portion 78 of the gear 68 locking the two gears 68 and 70 against rotation relatively to one another. It is preferred, in order to secure a more positive action of the clutch, toemploy two sets of springs 8081 which bear against'the arm 75 of the ring, 74 and the balls 77 respectively, and tend to normally look the clutch. Owing to the fact that the gears 71 and 72 will tend to rotate the gears 68 and 70 at different speeds, the shaft 54 will be driven directly from the pulley 66 as soon as the gears 68 and 70 are locked to one another, in the same manneras if the pulley 66 were keyed directly to the shaft 54. When the brake band 53 is tightened,

however, the retaining ring 74 and the gear 70 will be held against rotation and will prevent the balls 77 of the clutch from becoming wedged into place and lopking the gears 68 and 70 together. Then, as the gear 70 is held stationary, a slow rotatijon will be imparted to the-gear 68 to rotat the shaft 54 which is the result of the differential the shaft 54 and has a gear 68 formed inteantigens a is fastened to the drive pulley and covers the various gears.

The features of the machine hereinbefore described do not form a part of the subject matter of the present invention, and no claim to these features broadly is made herein as they are claimed in a co-pending application Serial No. 576,038. A description of these features has been given in order that a full understanding of the subjcct matter of the present invention may be had.

Referring now to the novel features of the present invention, relating to the variable strength of pull of the pi ncers, and particularly to the embodiment of the invention illustrated in Figs. 1, 2 and 6.; the pincers 3 are mounted upon. a pincer bar carried upon the forward end of a lever 81 pivoted on the machine frame at 82. The rear end 35 of the lever is forked to engage a block 83 which is free to slide on a rod 84. This rod is fixed to a slide 85 which is adapted to be moved vertically in ways on the machine frame by a roll 86 which engages a suitable chines, as will be seen by reference to the ward movement of the pincers will he stopped when the upper is drawn taut and the remaining downward movement of the slide 85 will result in compressing the spring 88, thus pulling the upper with a. tension equal to that of the :spring.

The devices provided for increasing the spring tension acting to pull the upper consist of a second rod 90 connected at its upper end with the rod 84: by a block 91, and at its lower fixed in a lug 92- projecting from the slide-85. Aspring 93 surrounds the rod, abutting at one end against the block 91, and at its other against a block 94;. The block is free to move upwardly against pressure of thespring 93, but is restrained from downward motion. by a pin 95 in the rod 90.

(ill

In the normal operation of the pincers the two rods 84. and 90 will move together, and when a pull is being exerted upon the up per the spring 88 will be compressed as in the usual'manner of operation. Provision is made for connecting the blocks 83 and 94 at the proper time, so that when the rods are depressed to pull the upper, both. springs must be compressed before the pincers have reached the end of their pulling movement.

The connection between the two blocks consists of a latch 96 pivoted on the block 94, the lower end of which may be swung am path in a cam 87 fixed on the shaft 54.. A spring 88 surrounds the rod and is confined between the block 83 and a nut 89. This construction is common in lasting ma over the block A lever 97 also pivoted on the block 94 engages at one end the latch 96, and the other end is in contact with a circular plate 98. The plate is mounted on the shaft 54, and secured to shaft 99 6) inside the shaft 54- by apin passing through slotslOO in the larger shaft. spring 101 holds the plate normally to the left. The shaft 99 has a collar 102 projecting from the shaft from by a forked wedge 103. The wedge has a stud 10lpivoted in a hole in the end of the arm 9'. When the roll 8 engages the cam path 14 (Fig. 2) and is then actuated by the inclined portion 21 of the path, the wedge 103 will be forced between the end of the shaft 54 and the collar 102, thus moving the plate 98 to the right Fig. The lever 97 is turned and the latch 96 is turned to overlay the block 83, as shown inhroken lines in Fig. 1. lthas been explained that it is during the dwell. 20 that the pulling movement of the pincers talies place. The wedge 103 is retracted by the portion 19 of the can"; path which disengages the connec tion between the two springs. parent that the-auxiliary spring is thus rendered operative before the pulling movement of the pincer-s and returned to its normal position aftertne pulling operation by the cam path 14.

The operation of the machine need be described but briefly. The slow, strong pull of the pincers, in the illustrated embodiment of the invention, is used for the first lasting operation'loy the pincers and, therefore, before the shoe ismoved into a position. to have the upper seized by the pincers.

the handle 5 is moved downward by the operator, thus elevating the wedge 18 and I placing the roll 8 in the cam path 14. On release of the handle 5 by the operator, the weight of the parts at the other side of the rock shaft 6 causes the wedge 18 to drop and return the handle to its initial. position, as shown in Fig. l, sothat the roll 8 may be moved out of the cam path 14. by the cam 12 at the completion of a single revolution. of the shaft 54:. The portion 21 of this cam path throws the slow speed. mechanism into operation and at the same time moves the Wedge 103 to trip the arm 9? and increase the tension on the pincer lever 81. After the pull is completed, the portion 19 of the cam path 14 retractsthewedge 103 and reinstates the normal spring tension onthe pincer lever. It will he noted that this return of the sprin tension on the lever 81 to its normal strenath is wholly under control of the machine, through the cam path 1. and is not effected in any way by the movements of the lever 5.

While the particulars described are well suited to one mechanical form of the in. vention, it is not to be understood that these 54 and separated there- .80 l t is apparticulars are essential, since they may be variously modified within the skill of the artisan without departing from the true scope of the actual invention, as defined by the claims.

What is claimed as new, is 7 1. A lasting machine,'having, in combination, pincers,.pincer operating mechanism 'for'imparting a yielding pull to the upper, and means under control of the operator which, after actuation by him, will cause. the strength of the yielding pull imparted to the upper by the, pincer operating mechanism to be automatically varied by the machine, substantially as described.

2. A lasting machine, having, in combination, pincers, pincer operating mechanism, a spring connection between the pincers and the operating mechanism, means for varying the strength of the spring connection, and means wholly under control of the machine for returning the spring connection to its normal strength, substantially as described.

3. A lasting machine, having, in combination, pincers, mechanism for imparting a yielding lasting movement to the pincers, means for reducing the speed of operation of the pincers during a lasting movement, and means for automatically varying the yielding point of the pincers when their speed of operation is reduced, substantially as described.

4. A lasting machine, having, in combination, pincers, a lever, means to actuate the lever to impart a pulling movement to the pincers, means for reducing the speed of the pulling movement, a spring interposed between'the lever and the actuatingmeans, a second spring normally inoperative, and means for automatically connecting the two springs when the speed of the pulling movement is reduced, substantially as described:

5. A lasting machine, having, in combination, a bot-tom rest for the last, tack driving mechanism, pincers operating to draw the upper over the last under spring tension, and mechanism under control of the operator for automatically; giving an upward movement to the bottom rest, securing a slow updraw and overdraw movement of the pincers, increasing the spring tension through which the upper is pulled, and finally giving a slow downward movement to the bottom rest to return it to its original position, substantially as described.

6. A lasting machine, having, in combination, pincers, pincer operating mechanism, a spring connection between the pincers and their operating mechanism, and means under the control of the operator for causing the machine to increase the strength of the spring connection during a single op- 'eration only of the pincers, substantially as described. I

7. A lasting machine, having, in combi nation, pincers, pincer operating mechanism for imparting a yielding ull to the upper, mechanism operated by .9 machine for varying the strengthf'of the yielding pull, and means controlledlbyfthe operator for actuating said mechanism, :substahtially as described.

8. A last-ing'machine, ,having, in combination, pincers, pincer operating mechanism for imparting a'yielding pull to the upper, mechanism operated by the,.machine for varying the strength of the yielding pull for a time and then reinstating the normal strength, and means controlled by the operator for actuating said mechanism, substantially as described. I

9. A lasting machine, having,- in combination, pincers, pincer operating mechanism for imparting a yielding pulli'to the upper, devices for increasing the strength of the yielding pull, mechanism for operating said devices including a cam roll, a cam normally disengaged from said roll, and means for causing said cam and roll to become engaged, substantially as described.

10. A lasting machine, having, in combination, pincers, pincer operating mechanism, a spring connection between the pincers and their operating mechanism, devices for varying the strength of the spring connection, a cam for operating said devices,

and means under control of the operator for I causing said devices to be operated by said cam, substantially as described.

11. A lasting machine, having, in combi nation, pincers, pincer operatlng mecha nism for impart-ing a yielding pull to the nism, a spring interposed in said operatingmechanism, a second spring interposed in said operating mechanism normally unaffected by the pincer movements, means under control of the operator which'after actuation by him will cause the machine to connect. the two springs. and automatic means for disconnectmg the two springs to return said pmcer operating mechanism to its normal condition, substantially as de scribed.

ERASTUS E. WINKLEY. Witnesses WARREN G. OGDEN, RUTI' A. SIMoNns.

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