US1719653A - Power bed-lasting machine - Google Patents

Description

July 2, 1929. M. T. DENNE 1.719.653

' POWER BED LASTING MACHINE Filed April 21 1921 5 Sheets-Sheet l ss 46 No.1.

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POWER BED LASTING MACHINE Filed April 21, 1921 5 Sheets-Sheet 3 l elf .1

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POWER BED LASTING MACHINE Filed April 21, 9 s Shgfps-Sheet 5 Patented July 2, 192? UNITED STATES MARK THOMAS DENNE, or HIGHGATE, LONDON, ENGLAND.

POWER BED-LASTING MACHINE.

Application filed April 21, 1921, Serial No. 463,344, and in Great Britain February 14, 1920.

(GRANTED UNDER THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. I, 1313.)

The lasting of shoes (which term shoes is intended to include boots) on a bed-laster is a very critical and in some respects delicate operation, if best results are to be attained.

It is well known that leather uppers vary very considerably in their adaptability to lasting, even when, to outward appearance, they are exactly similar. Even individual uppers are not always uniform in this respect, as it is sometimes found that one part of the upper will yield more readily to the action of the wiper-plates than another part.

It is very essential therefore for the workman to be able to control the wiper-plates during their wiping-over movement, so that, as they are made to advance, he can ad ust and also put extra draft where required onv the pleats or folds in the upper (and the lining) according to the character and general condition of the particular upper on the last.

Although the workman will adjust the upper, when the wiper-plates are first presented to the shoe, so'that the folds or creases are regular and evenly distributed,-he often finds that this regularity is not maintained as the wiper-plates are further advanced, and he will, as soon as possible, endeavour to correct or rectifythis. If the wiper-plates can be made to recedeyor at any rate to relax their full pressure, the desired correction is facilitated, and, further, he may humor the upper by causing the wiper-plates to advance in progressive steps and allowing relaxation ofv their full ment.

WVhcn more or lcss heavyor thick uppers pressure after every such advanceare being lasted, these niceties of control over the wiper-plates are'most difficult to attain because of the considerable force that has to be exerted to move them.

It has been proposed to construct powerdriven bed-lasting machines, but, so far as I am aware, none of them has got beyond the experimental stage.

plete control over the means whereby power is transmitted from the power shaft to move the wiper-plates, so that'any degree of force, up to the maximum available, may be brought to variable at any time whilst the wiping-over is proceeding; further, he should be able to lock the power transmitting means at any moment,- so that the wiper-plates-whatever Not only should the workman have com bear, but the force brought to bear must be their position, maybe at that time-will maintain their pressure against the upper on way attend to effecting adjustments or cor-,

rections of or in the work, as these may be required from time to time.

,A machine embodying my invention is illustrated in the accompanying drawings in which Fig. I is a front elevation; Fig. 1 a detail in section, to be referred to; Fig. 2 a side elevation looking'froin right to left of Fig. 1; Fig. 3 is a front view and Fig. 4 a side View, partly in section of the shoe support; Fig. 5 is a front'view and Fig. 6 a sectional side view of the presser; Fig. 7 is a'plan View of the binder wire carrier; Fig. 8 is a halfsectional plan of the wiper-plate holder and controlling mechanism; and Fig. 9 is a rear view, partly in section of the power transmitting and controlling means, the Figs. 3 to 9 being drawn to a larger scale than are Figs. .1 and 2. j

In said drawings the numeral 1 indicates. a

suitable frame which supports a column 2 on the upper end of which is a slide support 3 on which the carriage 4: of the heel clamp and support is slidably, and the post 5 of a toe rest 27 is adjustably mounted.

The carrier 8 supports any suitable heel clamp 13 and it is provided with a bolt 10 that passes through slots 11. in the webs 6, on which bolt rollers 9 are mounted that engage on the underside of the slides 7. The carrier may be clamped in adjusted position by a clamping nut 12 on the bolt 10. The carriage 4 may be adjusted along the support 3 by the usual screw 19 and handwheel 20 to suit different lengths of shoes indicated at 14.

The carrier 8 pivotally supports the post 16 of the heel pin 15, a link 17 and nut 18 thcre-' on serving as an adjustable stop to limitthe movement of the post 16.

The post of the toe support 27 may be adjusted on the support 3 and clamped in position by set screws 21.

The upper end of the post 5 is formed with a recess to receive a block 22 which block is pivotally supported on a stud 23 carried by the post. Extending upwardly from the block 22 is a stem 24 the lower part of which is formed with a screw-"thread to receive a nut 25, and the upper part of which is of reduced diameter and is formed with a groove 26. The nut 25 carries a toe-support 27 which slidable on the stem 24, but is prevented from rotating about the stem bya setscrew 28 that enters the groove 26. The toe-support 27 may be provided with a pad 2 to bear against the shoe.

The block 22 is pivotally supported on the pin 23 so that the toe support may be swung out of the way, a spring pressed pin or plungerr 29 serving to retain the said parts in either position. I

At the back of the machine the frame carries a bracket 30 that supports a horizontally slidahlc rod 31said rod being slidable in a bearin g 42.

The free end of said rod is formed with an eye 46 through which an externally threaded sleeve 32 passes so as to be slidahle therein, nuts 33, 84, on said sleeve enabling it to be setup or down and clamped in adjusted position. The upper end of the sleeve 32 has two lugs 35, 36, which support a pivot pin 37 on which a cam block 88 provided with a handle 39 is mounted.

Slidable within the sleeve and pressed up against the cam block 38 by a spring 41 is a presser bar 40.

When the shoe has been adjusted in posi tion on the shoe supports the presser is brought over the shoe and by turning the handle from its vertical position to that shown in Fig. 5, the presser will be depressed to hold the shoe tightly down on the toe support.

If desired the lower end of the bar 40 may be made with a recess to receive the shank 43 ot a presser plate 44, the said shank being held in positionbut so as to be easily removed-by a spring detent 45.

50, 51 are the wiper-plates which are secured by set screws 54 to sliding plates 52, 53, respectively, which sliding plates are carried by a holder constituted by two cheeks 55, 56, which holder has a trunnion block 57. that is supported so as to be rotatable in a bearing 58 which is formed or provided on the upper end of a trunk 59 that is slidable in a bearing 60 on a bracket 61.

The sliding- plates 52, 53, are provided with that it the plates 52, 53, be moved from right to left or vice-versa, the wiper-plates will, as they advance towards or recede from the shoe support, swing on a centre which is coincident with the point of contact of the said wiperplates.

The trunnion 57 is bored out so as to receive a spindle 67 and cap-nut 68 on one end there of, the said spindle being arranged to he slidable in the axial direction. The other end of the spindle extends into the holder (55, 56) and is there provided with a cross-arm 70 the opposite ends of which engage in suitable slots 71 in the sliding plates 52, 58. A spring 69 around the spindle 67 and pressing at one end against the nut 68 and at the other against an internal flange of the trunnion 57 normally serves to move the spindle 67 and the sliding and wiper-plates away from the shoe support. In. Fig. 8 the parts just referred to are shown in their extreme right hand positi0nsi. e. the position in which the wiper-plates take up when the wiping-over is completed as if the lever 72 (Fig. 1) were exerting force against the nut 68 suflicient to overcome the force of the spring 69.

The wipers are moved toward the support by controlling means which also operates to control the position of the wipers. This controlling means comprises a lever 72 pivoted at 73 on lugs extending from the bearing 60 and adapted at its upper end to engage the nut 68. The rocking of said lever in one direction will move the wiper-platesias already indicated whereas its movement in the opposite direc* tion will permit the spring 69 to move the wiper-plates so as to withdraw these from the shoe. In Fig. 1 the said lever is shown divided, the upper portion showing it in the position. when it has imparted movement as stated to the wiper-plates whereas the lower part is shown in the opposite position in which the spring 69 will have moved the wiperplates back to their normal or starting position.

Hocking movement is imparted to the said lever by a horizontally slidable bar 74 to one end of which said lever is connected whilst its opposite end has a slide bearing 75 that is engaged by a roller mounted on a stud 76 carried by the frame 1.

At a suitable position the bar 74 has a vertical slot 80 (Fig. 9) to receive an antitriction roll 79 on the crank pin 78 ot a crank disc 77, the stem 8]. of which is received in the boss 82 of a disc-wheel 88 (the disc being secured so as to move with the boss) said boss being carried so as to rotate in a bearing 84, with which the frame of the machine is provided.

It will thus be seen that if the disc-wheel 88 be rotated it will through the crank pin 78 impart longitudinal movement to the horizontal bar 74 and this, in turn will rock the lever 72 for the purpose already described.

The distance of the crank pin 78 from the.

' axis around which it rotates is. such that of the machine, serves normally to maintain the parts 78, 74, and 72, in or to return them to their normal or starting positions.

The upper half of the disc-wheel 83 is formed as a gear-wheel with the teeth of which a toothed pinion 85 is in gear; whereas the lower half of said disc-wheel is formed with rachet teeth with which a pawl 91'may i be engaged, as will be described.

The pinion 85 is fixed to or formed on the boss 86 of onemember (92) of a friction clutch, said boss being loosely mounted on thepower shaft 87 that is carried in bearings 88, 89 and is provided with a belt pulley 90 'so that it may be driven from a suitable source of )ower; 92, 93 constitute two members of a riction clutch, the former of which is loose on the shaft 87 whereas the latter though slidable on the shaft is compelled to rotate with it, this being attained in any suitable manner, as by a feather, or a screw, or both that enter slots in the shaft. The friction members 92, 93, are normally held apart by a spring 94 and to bring them into any desired degree or force of frictional engagement I provide a wedge 96 that straddles the shaft 87 and contacts on one side against the bearing 89 and on the other against an antifriction bearing 95, at the sideof the member 93.

Supported by suitable bearings at a position near the lower part of the disc-wheel 83, isaspindle 99 on which are mounted pawl controlling friction discs 101, 102, the boss 100 of the former of which has extending forwardly (Fi 9) therefrom an arm 98 to which the wedge 96 is pivotally connected by the link 97. The boss 103 of the other friction disc (102) has extendin forwardly a lever 106 that has*an arm' 10 extending from it to a position immediately below the disc-wheel 83 and this arm 107 carries the pawl 91, the latter being secured in position by set-screws 108. The discs 101, 102 are maintained in frictional engagement by a spring 104 on the spindle 99, which spring is interposed between the boss 100 of the disc 101, and a nut 105 on said spindle, so that by rotating the nut the frictional engagement of said discs may be regulated.

At a convenient position is a treadle-shaft 109 on which a treadle-lever 119 (Fig. 1) is fixed, there being the usual spring (not shown) to maintain said lever in its normal or raised position. On the treadle-shaft there is also fixed a lever 110, the free or outer end of which is connected by the link 111 to the lever arm 98 already referred to, so that depression of the trea dle-lever, acting through the parts the link '97. The partial rotation of the disc 101 will impart similar movement to the disc 102 and thus through-the lever 106 and arm 107 will take the pawl 91 outof engagement with the ratchet teeth of the disc-wheel 83.

The parts are so proportioned that the very. first part of the movement of the treadledever will take out the pawl 91 and only after this is done will the further movement or depression of the treadle-lever effect the frictional engagement of the discs 93, 92 in order to impart movement to the wiper-plates as already described.

In order that the pawl 91 will almost instantly engage the ratchet teeth of the wheel 83, when the treadle is released-mo matter how far it may have been depressedI provide an adjustable stop 112, in the form of a set-screw which is screwed through a lug 113 carried by the frame 1 of the machine, and

against which stop the arm 107 will contact on the initial movement of the treadle wh p this is depressed. lVhatever further movement may then be imparted to the treadle to depress it, the disc 101 will merely slip on 102,, and the pawl 91 will be held so close tothe ratchet wheel that the moment the treadle is released said pawl will almost instantly engage with said ratchet Wheel.

It will thus be seen that the initial part'of the movement when the treadle isbeing de pressed, and the initial part of its movement when it is released, will respectively disengage and engage the pawl from and with the ratchet wheel, so that whatever the pressure that the wiper-plates may be exerting on the upper against the last at the moment the treadle is released, the parts Will be locked in; the position to maintain that pressure. It

may be desirable however to relax that pressure oreven to retract the wiper-plates some distancefrom the position to which they have been moved. T

The operator in such a case will release the treadle and then depress it again to a very slight extent. This movement will disengage the pawl 91 from the ratchet-wheelbut as already explained-it willnot suffice to put the friction discs 93, 92 into engagement, so

that the stress on the up'perand the tension of the springs 69 and 114 will at once'act to relieve the pressure of the wiper-plates,

' and when this has been effected to the extent desired, the workman will atonce depress the treadle so as to put the friction discs 93, 92,

into en agement again at any desiredpres sure. r he may release the treadle so that the pawl 91.will again engage the wheel 83. If however the wiper-plates are to be retracted for a substantial distance, the workman will retain the treadle in the position 6 110, 111 and 98, will move or rotate the'friction disc 101 and simultaneously draw down described until the springs 69 and 114 have overcome the inertia of the parts and begin to move towards their normal position, and when the wiper-plates have thus been with drawn to the extent desired, the workman will again depress the treadle.

The workman is thus enabled to have complete control over the movements of the wiper-plates and over the power they may bring to bear in wiping-over the upper.

In some cases, viz when the edge of the last is rounded off, it is necessary or desirable that the wiper-plates rise simultaneously as they are made to advance to wipe the upper over the edge of the last. For this purpose I provide means whereby the workman may predetermine whether, and, if so, to what eX- tent, the wipers shall be made to rise, the said means comprising the followingsee Figs. 1 and 1.

The trunk 59 has a stem 127 at its lower end which stem is provided with a roll 152 that is engaged in a slide 151. The slide has a trunnion 150 that is pivotally supported in a bearing in the horizontal bar 74: and passing through slots in said bar are set screws 122, 123 that screw into the body of the slide 151 so that the latter may be set either to be horizontal or at an angle with respect to the:

horizontal and then clamped by the set screws. (To ensure a good bearing, the bar 7 f may be made with a facing 121.) If the slide is fixed horizontally there will be no lifting movement as the bar 74: moves from right to left, Fig. 1, and it will be seen that by setting the slide at an angle the stem 12', trunk59, bearing 58 and the wiper-plates may be made to rise as the bar 74 moves from right to left i. e. during the time said bar is bringing about the forward movement of the wiper-plates.

In order that the wiper-plates may be adjusted either higher or lower than the normal position I provide thestem 127 with a screwthreaded part 59 and a nut 59 thereon on which latter the trunk 59 rests.

130 indicates the usual spindle having a treadle 118 by the depression of which the workman can raise the shoe support but as this is a well known arrangement and forms no part of this invention it is not further described.

If the lasted upper is to be fastened or secured in lasted condition by means of a bracing wire, I may provide-see Figs. 1 and 7a carrier 140 having an arm 141 on which by a spring friction device 142 the usual wire spool or reel is carried and an arm 14:6 projeeting from which is a stem 145 that carries the usual spring pressed tensioning washers What I claim is '1. A. lasting machine comprising, in combination, a last support wiper-plates movable towards and from said support, spring operated means to move said plates from said support, controlling means for the wiper plates operated in one direction by a spring, and in the opposite direction by power under the control of the operator, the said controlling means during its latter movement, producing a movement of the wiper-plates to wards the support, means to lock the controlling means in any position after it has produced a movement of the wiper-plates, and means for releasingsaid controlling means.

2. A lasting machine comprising, in combination, a last support, wiper-plates movable towards and from said support, spring operated means to move said plates from said support, a power shaft, a friction clutch thereon, treadle operated means to control said clutch, means operated through the friction clutch for imparting movement to the wiper-plates towards the shoe support, a locking means to retain said last mentioned means at any pointof their movement and means coupled to said treadle operated meansfor imparting movement to the locking means.

3. A lasting machine comprising, in combination, a last support, wiper-plates movable towards and from said support, spring operated means to move said plates from said support, a power shaft, a friction clutch thereon, a pinion on said clutch, a disc-wheel in gear with said pinion and having a crank, connection between saidcrank and the wiperplates, a second friction clutch, a stop con trolled thereby, and a. treadle operated mechanism to operate both said friction clutches.

4:. A lasting machine comprising, in combination, a last support, relatively movable wip'er-plates, a power shaft, a friction clutch thereon, treadle operated means to render said clutch effective, a pinion on one member of the friction clutch, a disc wheel in gear with said pinion, ratchet teeth on said wheel, a crank on said wheel, a bar operated by said crank and a lever connected to said bar and by which the wiper plates are moved towards the shoe support, a pawl to engage said ratchet teeth,a friction clutch to operate said pawl, a stop to limit the movement of said pawl, a connection between the treadle operated means and the latter clutch, and a spring to rotate the disc wheel, whereby the movement of the wiper-plates is controlled.

MARK THOMAS DENNE.

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