US1674085A - Machine for operating on footwear - Google Patents

Description

M. H. BALLARD ET AL MACHINE FOR OPERATING 0N #OOTWEAR June 19, 1928.

Filed May zsji 1926 2 Sheets-Sheet 1 June 19, 1928. 1,674,085

M. H. BALLARD ET AL MACHINE FOR OPERATING ON FOOTWEAR Fil ed May 28. 1926 2 Sheets-Sheet 2 Patented June 19, 1928 UNITED STATES PATENT. OFFICE;

MILTON H. BALLARD, OF BEVERLY, AND THOMAS H. SEELY, 0F MELROSR MASSACHU- SETTS, ASSIGNORS T0 UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY. 1

MACHINE FOR OPERATING ON FOOTWEAR.

Application filed May 28, i926, Serial No. 112,279,.and in Great Britain April 24, 1926.

This invention relates to machines for use in the manufacture of boots and shoes and is illustrated as embodied in a machine of the type disclosed in an application Serial No. 36,922, tiled June 13, 1925, by Rene E. Duplessis, for use in preparing the heel-seats of shoes for the reception of wood. or other heels to be attached thereto.

After the rear portion of the sole of a shoe has been beveled to fit it to receive the scoop-shaped heel-seat or cup of a wood or other heel having a concave attaching face, it is desirable that the rear portion of the shoe, including the trimmed sole and the ovcrlasted upper and counter, be subjected to heavy pressure by a die having substantially the shape of the heel that is subse quently to be attached thereto.

Objects of this invention are to improve and perfect machines of the type referred to without sacrificing any of the advantages of prior machines.

Features of the invention consist in means for providing more powerful pressure for effecting the heel-seat forming operation and means for conveniently varying the pressure to meet different conditions. As illustrated herein, a very heavy spring is provided by compression of which, through movement of a plunger by a toggle, pressure is applied to the work. The spring is arranged for bodily movement toward and from the plunger so that, other conditions being equal, more or less of themovement of the toggle will be effective to compress the spring. In order to maintain the parts of the toggle and the shoe support in the same initial position irrespectively of the adjustment of the spring, a secondspring of sutlicient strength only to sustain the plunger, toggle and shoe-supporting parts is provided, the heavy spring being adjustable bodily with respect to the plunger sustained by the lighter spring.

When a machine of the type referred to is restarted from the position of rest with the work under the pressure of the heavy spring, the spring reacts and its force is applied to rotate a motor-driven eccentric member in the same direction in which the motor tends to drive it. As heretofore constructed, the eccentric may run ahead of its operating member, with the result that the stop projection of the clutch may be brought against the stop arm violently and breakage of the parts may result. It has been proposed to employ a brake which will be automatically applied to retard the eccentric during this part of its movement, but such a construction, while effective for the purpose intended, can be tampered with and its operation is afi'ected by the presence of oil intentionally or accidentally introduced. Accordingly, a feature of the present invention consists in improved means for preventing overrunning of the eccentric member due to reaction of the heavy pressure spring by which adequate braking effect is produced and, at the same time, economy of energy is obtained. As illustrated, a one-wayv clutch is provided between the eccentric member and a power driven member so arranged that, in case the eccentric member tends to move faster than the power driven member in the same direction, the clutch will become effective to prevent such movement. Thus the energy'ot the pressure spring, as it reacts and is applied to rotate the eccentric, will tend to rotate the power-driven memberfaster and in the same direction and hence will tend to speed up the motor by which the power-driven ymember is operated. The speeding up of themotor above its normal speed causes it to act as a generator and to feed current back into the line, thereby effecting a considerable economy. .Moreover, during the reaction of the spring, the reducing gearing between the motor and the cocentric becomes multiplying gearing between the eccentric, now the driving member, and the motor, thus placing the reacting spring at a great disadvantage which, contributes materially to the braking efiie ct.

These and other features of the invention, including various constructions and combinations of parts, will be more readily understood from the following detailed description when read in connection with the accompanying drawings and will be pointed out in the appended claims.

The clutch mechanism herein disclosed but not claimed per se is made the subject-matter of a divisional application Serial No. 278, 356, filed 17th, 1928. i

tit)

f n the drawings- Fig. l is a side elevation of a machine em bodying the present invention, part of the frame being broken away;

Fig. 2 is a detail in front elevation of means for indicating the adjustment of the pressure spring;

Fig. 3 is a detail, partly in section, of parts shown in Fig. 1;

Fig. 4 is an exploded view in perspective of the clutch mechanism; and

Fig. 5 is a View of the clutch mechanism. partly in section, taken from the side opposite to that shown in Fig. 1.

For a description of parts of the machine not. herein fully explained. reference may be had to the above'mentioned appliililUl].

Referring to Fig. 1, the numeral 12 indicates the frame of the machine. secured to the upper part of which is a backwardly tiltedframework comprising a head it rigidly supported by rods 10, 1.7, the rods being tension rods and the rods 17 COHIIHTQS' sion rods. To stiffen the structure and prevent any lateral flexing of the rods 16, 17, a bracing member 18 is provided, the rods 17 passing through the solid rear portion of the member 18 and the rods 16 passing through perforatedforward projections 10 of the member 18. Secured to the head 1- is a the support :20. On the lower end of the die support is a die :22 having a stem 24: extending up intothe die support and removably held therein by a spring pin 26. By pulling outwardly on the pin the die may be released. removed, and another die substituted for it.

A last pin 27 is mounted on a substantially cylindrical rocking member 28 which is seated in a block 29 and is held in place by plates 30 secured to the blocl; 29. The construction is such that there is a small amount of relative lengthwise movement between the member 28 and the block .20. The block 29 is dovetailed to a member 3-l for rectilinear sliding movement transversely of the shoe, and means is provided to hold the block 29 frictionally in place and prevent unintentional movement thereof relatively to the member 34. The lower portion of the member 34 is reduced in width. being braced by the bifurcated upper end of a large screw 38. In the bottom of the slot forming thebifurcation is seated a block having teeth in its upper face to be engaged by teeth formed on the lower end of the member 34. The member Si l has curved surfaces which engage corresponding curved surfaces on the upper ends of the. bifurcations of the screw 38, and the toothed lower end of the member 34 is also similarly curved, the centers of these curvatures lying approximately in the center of the heel-seat of the shoe on the support. A screw passes freely through one of the bifurcations of the s-1crew 38. through a slot in the member 3&- and is threaded into the opposite bifurcation, so that tightening of the screw acts to clamp the number .l-lbetween the bi furcations. The constriwtion is such that when the screw -10 is loosened the member 251 may be lifted suliiciently to release the teeth in llf' lower sun-face. thus permitting the upper parts of the support and the shoe to be adjusted in the. longitudinal median plane. of the shoe about a center line substantially in the center of the heel-seat so as to distribute properly the prcsun'e of the die upon the front and rear portions of the heel-seat. The screw 38 is mounted to slide freely up and down in a post i; and is prevented from turning in the post by suitable means. A large nut 4a is threaded on the screw 3b and rests on top of the pat -12. By the construction described it will be seen that the vertical position of the last pin may be quickly adjusted by turning the nut ll; that the 'n'cssure of the die upon the front and rear portions of the heel-scat. may be equalized by tipping the last: pin and shoe in the longitudinal median plane of the shoe. after loos ening the screw -10; that the position of the heel-seat. of the shoe with respect. to the die may be varied in a horizontal plane by sliding the block 20 transversely of the member fit or by sliding the member relatively to the block 20; and that the pressure of the die upon the two sides of the heel-scat may be equalized by rocking the member :28 with respect to the member fit).

The post -12 is pivoted at it; to the upper end of a shaft. 48 which mounted for sliding movement in the frame 12 witn its longitudinal axis in alineznent with the longitudinal axis of the die support 20, these axes being tilted rcarwardly at approxin'iately ten degrees to the vertical. Downward movement oi the shaft in is. limited by a pin 40. Tipper and lower links 50. 52 of a toggle are connected together at 5f. the upper end of the upper link 50 being connected to the shaft 48 in a manner to be described and the lower end of the lower link 52 being pivotcd at. to a plunger 50 which is arranged to slide in a cylindrical guideway formed in a part of the machine fran'ie. In one side of the plunger a slot. (30 which is engage-d by a screw 02 for limiting up and down movement of the plunger to the space of about one inch. Beneath the plunger .30 there a very stiti con'ipres;-:ion spring of which requires pressure in the neighborhood of 8.000 pounds to shorten it one inch. The lower end of the spring 04 rests on a disk 06 which may be raised and lowered by a screw 08 threaded through the bottom of the cylinder and engaging the disk. Pinned to the screw (38 is a large gear T0 meshing with a pinion 72 on a vertical shaft H and having Elli is a threaded sleeve 78 (Fig. 2) which engages a block 80. This block is held from "rotation and is moved up and down as the crank 7 6 is turned. Onthe block is a linger 82 overlying a scale 84 to indicate to the operator the amount the heavy spring 64 is raised or lowered by turning the crank 76. The movement of the finger 82, however, is much greater than the movement of the spring 64, so that fine adjustment of the pressure to be applied through the spring may be made.

lnside the heavy spring 64 is a lighter and longer spring 86 which also rests on the disk 66 and engages the plunger 56'. This light spring 86 is strong enough to lift the plunger and, if necessary, the connected jack parts. The middle joint 54 of the toggle is connect ed to an eccentric strap 88 operated by an eccentric 90 which is mounted for rotation on a stationary, horizontal shaft 92. The shaft 92 is held from rotation by a casting 93 which is securely held by a set-screw on the shaft 92 and has at its upper end a notch to engage a downwardly projecting rib of the machine frame 12. A set-screw 95 holds the casting against movement with respect to the frame. This casting is so designed that it may be used in the reverse position at the opposite end of the shaft and, in fact, two such castings are preferably employed. The eccentric 90 and tog le 50, 52 are so designed that straightening of the toggle by the eccentric from its normally bent position to its fully straightened position will cause separation of the ends of the toggle of a little more than aninch. That is,if the jack 42 is prevented from movement, the plunger 56 will, by straightening of the toggle, be pushed downwardly against the heavy spring 64 and the spring will be shortened about one inch.

.The connection of the jack-supporting shaft 48 to the upper link 50 of the toggle is made as follows: The lower end of the shaft 48 is slotted to receive a block 04 (Fig. 3) which is held in placeby a strap 96 pass ing around the end of the shaft 48 and held in place by a bolt 98. Apin 100 passes through bifurcations of the upper end of the toggle link 50 and through the block 94 to form the upper joint of the toggle. The block 94 has a slight play in the slot so that the shaft 48 may be raised a short distance, for example a quarter of an inch more or less, relatively to the upper joint 100 of the toggle.

A pin 102 projects laterally from the shaft 48 and through a part 103 adjustably fixed to the upper end of a rod 104, the lower end of which has free longitudinal movement in a member 105 pivoted at 100 to the forward end of a lever 108. The lever 108 ispivoted to the frame at 109 and its rear end bifurcated to embrace a clutch operating bar 110 to which is secureda block 112 that overlies the rear end of the lever 108. The bar 110 is pivoted to a treadle lever 113 fulcrun'ied at 114 to the frame, upheld by a spring 115 and having on its outer end a treadle 110. compression spring 117 is arranged on the rod 104 betweena .lixed collar 118 and the member 105, the arrangement being such that the distance between the pin 102 and the pivot 100 can be shortened by con'ipre'--.- sion of the spring 117, the spring, however, being stiff enoughto lift the shoe and jack when movement of these parts is unobstructed. r i

\Vhen the treadle lever 113 is depressed sufiiciently, the clutch is tripped in a man-- ner to be described and the eccentric 00 is given a semi-rotation to straighten the toggle. The preliminary movement of the iireadle lever, however, acts through the lever 108 and the spring 117 to lift on the pin 102 and push upwardly on the jack. Thus, if a shoe is 011 the jack and its heelseat is close to the die, it will be at once pressed against the die, and the spring 117 will be compressed by further movement of the treadle. If, however, there is a substantial space between the shoe and die, the jack should be raised by turning the hand nut 44 so that lifting of the shoe and jack through a distance less than the lost motion provided between the block 94 and the strap 96 will be effective to press the shoe against the die, this movement, of course, being produced by the initial movement of the treadle lever through the spring 117. If the operator finds, upon inspection, that the shoe is incorrectly located with respect to the die, he can release the treadle and reposition the shoe, the final depression of the treadle,

made possible by the yielding connections described, starting the machine and cansing the toggle 50, 52 to be straightened and pressure to be applied to the heel-seat, the amount of pressure depending upon the ini tial space between the upper end of the heavy spring 64 and the plunger 56. If the adjustment of the spring 64 is such that there is, before the machine is started, substantially no space between the plunger 56 and the spring 64, the maximum pressure of the spring will be applied to the shoe, and by adjustmentof the spring downwardly as described by turning the crank 76, any desired lesser pressure may be obtained. Adjustment of the spring 64 possible at any time when the toggle is broken without much elfort, since turning of the crank 7 6 merely operates the screw 68 to raise and lower the spring bodily without its being placed under the tension, the incidental compression of light spring 86 being effected without preciable resistance.

The upper portion of the clutch bar has a long notch in its rear face which engages a flat ide on a pin 1.22 projecting from a. clutch stop lever 12-1- pivoted at 126 to the frame. The bar 11 is held against the pin 122 by a spring 128 connected between the lever 1211 and the bar. The notch 120 provides a lost motion connection between the bar 110 and the lever 12-1 to permit raising of the jack by preliminary motion. of the trcadle prior to the tripping of the clutch. The end of the long rear arm of the stop lever 121 lies normally in the path of a projection 1 10 of a clutch pawl lifting member 32 which is mounted for limited turning movement on a concentric surface 133 (Fig. 4-.) forn'ied on the hub portion of a. incmljier 131; on which is 'l'orn'ied the eccentric fit). The normal position of the clutch stop lever 12% controlled by an adjusting screw 136 fa tened to the forward end of the leve and engaging the frame 12. The clutch pawl lifting member 132 has two projections 12-30, 138 which are arranged about 180 degrees from each other.

\Vhen the projection ei'igages the stop lever 121 the machine is stopped in a. position of rest. with the toggle broken. To provide for adjustment so that the eccentric 9t). when in this stopped position, will be on dead center, a contact. member lit) is mounted for adjustment lengthwise of the lever 12-1, the member 14.0 for this purpose being provided with a stem which enters a split; clamp formed in the stop lever 121 and is held therein by a clamp screw 112. \Vhen the other stop project-ion 13S engages the contact piece 11-0 the machine stops with the work under pressure. It is desirable that there be adjustment for this projection to insure that the eccentric will. under different adjustments of the pressure spring (3 1, stop in dead center position with the toggle straightened and that this second adjustment be made without. disturbing the first, that is, the adjustment of the contactpicce 110 relatively to the lever 124. The projection 138 accordingly is in the form of a hardened block having one face in supporting engagement with a surface 141 (Fig. formed on the member 132 and adjustablv held by a screw 116 threaded into the block 138 and turning freel in a lug 1-18 on the member 132, the screw, after adjustment. being held from turning by a cotter pin 1 19 and having a head which given a conical formation to prevent its catching on the contact. member 110. By adjusting the screw the point where the machine stops with the work under pressure may be changed so that the eccentric will be exactly on dead center with the toggle fully strai htened. The

clutch pawl lifting member 1312 is slotted at 152 to receive alug 15-1- on the eccentric carrying member 131-. 111 one end of the slot 152 is a spring plunger 155 to reduce the shock of contact of the member 1 12 with the lug 15-1, due to the sudden action of a spring 150 connected between a web 157 on the member 132 and a. pin 158 on the member 13-11 and a similar spring 155) (Fig. l) similarly comiectcd betwcenrhe members 132. 13-1. on the opposite side of the shaft. two springs: being desirable because of the large size of the hub 133 on which the member 132 turns. 'l'hese springs act. when permitted to do so. to turn the member 1251 clockwise (Fig. 1) as far as the lug 15-1. and plunger 155 permit. with respect to the eccentric carrying member 131-1. Secured to the clutch pawl lifting member 132 is a cam piece 160 which underlies one side of a wide pawl 1G2 pivoted at 1621 to the member 131. The remainder of the width of the pawl overlies a. series of teeth 161- formed in the periphery of a ring 165 concentric with and pinned to a coi'itinuously driven gear 1.611. The continuously driven gear 166 n'ieshcs with a. pinion. 168 on a horixoi'ital shaft 170 which carries also a large gear 172 with which a pinion 17-1 on the armature shaft 176 of an electric motor 178 meshes.

lVhen the treadle 116 is sufficiently depressed. the clutch bar 110 pulls dmvnward- 1 v on the short arm of the clutch stop lever 124, lifting the contact piece 140 awa from the projection 131) on the clutch pawl lifting member 132 and allowing this member to be turned clockwise by the s 'n'ings .156. 1.51) to release the pawl 1.62 which is forced by a spring 182 toward the ring 165 on the continuously driven gear 166 and engages one. of the teeth 16-11. Thus. motion is imparted to the eccentric 90. Soon after the machine starts, a surface 18-1 on the eccentric carrying member 131 engages the clutch bar 110 and pushes it ftn'wardly, releasing the notch 120 from the pin 122 on the stop lever 121 so that the lever drops into position to err gage the second projection 138 of the clutch pawl lifting member 132. 'hen. due to rotation. of the eccentric. the second projectioir 138 of the clutch pawl lifting memher 132 comes into contact. with the stop lever 121, its movement of course arrested while the pawl 1G2 mounted on the eccentric carrying member 131 is still in motion. Hence the pawl 162 engages the cam piece 160 on the now motionless member 132 and is lifted out of contact with that one of the teeth 161 on the ring 1135 with which it happens to be in engagement and the eccentric stops. lVhen restarted from this position, another surface 186 on the member 1 34 engages the bar 110 and releases the stop lever 124: so that the machine will stop after another half revolution of the eccentric.

Means is provided to insure against rearward turning of the eccentric member 134 when the machine is stopped, due to the rearwardly off-center position of the weight of .the eccentric and to the pull of the springs 156, 159. An arm 188 is pivoted at 126 to the frame and its lower end is held by a spring 190 againsta circular peripheral portion 192 of the eccentric-carrying member 134. A notch 194 (Fig. 4) is formed in the portion 192, and 180 degrees from the notch 194 (Fig. 1) is an inserted block 196 having several similar notches 198, these notches being so located that either the notch 194 or one of the notches 198 will be adjacentto the end of the arm 188 when the machine is in stopped position. Mounted for limited turning movement on the end of the arm 188 is a short lever 200 having its end formed a tooth to engage one of the notches and oppose counter-clockwise movement of the cccentric-carrying member 134. Thelever 200 is held yieldingly in the position shown in Fig. 1 by a spring 204 so that if the eccentric member 134 is forcibly turned backwardly in a direction to carry the notch against the tooth it will yield against the spring 204 and allow the eccentric member to turn. Under normal conditions the resistance of the lever 200 to movement of the eccentric-carrying member will be sufficient to prevent it from going too far and. to hold it from backward movement.

This construction prevents the oli -center weight of the eccentric and the pull of the springs 156, 159 from turning the eccentric backwardly when the machine is at rest. If this is allowed to occur, the pawl 162 will move off of the cam piece 160 and finally drop far enough to engage one or the teeth on the constantly rotating ring 165 and the pawl will be thrown forwardly. \Vhen this happens, the pawl is immediately thrownout of engagement with the teeth by the cam piece 160, but recurrence of this action produces objectionable clatter and wear on the parts which the present construction prevents. The lever 200 is made so that it will yield under abnormal force because it some times happens that the pawl 162 has not fully engaged one of the teeth 164 and slips off after the spring has been partly com pressed, causing the eccentric-carrying memher 134 to tnrnviolently backward. Should this happen, the lever 200 would yield and prevent breakage. l\/Iore0ve1, in wiring up the electric motor connected to the machine. the leads may at first be so connected that the motor will run in the wrong direction. If the machine is started under these conditions, the eccentric, by reason of a construca tion to be explained, would be forcibly turned in the direction to which the tooth on the lever 200 is opposed, and, if the lever would be broken. The notch 194, which is in engagement with the lever 200 when stopped under pressure, is never subjected to great strain as its function is merely to prevent accidental movement of the eccentriccarrying member because 01 vibration such, for example, as that caused by the "operator in pounding up the shoe While it is under pressure.

lVhen the machine is restarted from its position with the work under pressure, the heavy spring 64 rcactsthrough the toggle 50, 52 and the eccentric strap 88, causing the eccentric to tend to turn faster in the same direction in which it is being driven by power. viously designed, has caused the eccentric to speed up and the clutch parts to engage the stop arm with such force as to result in excessive wear and too frequent breakage. In the machine of the present invention, this speeding up of the eccentric-carrying mem her is prevented as follows: A hub portion 206 of the eccentric-carrying member 134 has pinned thereto a one-way clutch member 208 having three recesses with inclined sur-' faces 210. The member 208, when the parts are in assembled position, extends inside the ring 165 secured to the gear 166. Between the cylindrical inner periphery of the ring 165 and each of the inclined surfaces 210 on the member 208 is arranged a clutch roll 212 which is urged by a plunger 214 toward the smaller end of the recess between the surface 210 and the ring. That is, between the occentric member 134 and the continuously driven gear 166 there is provided a one-way clutch of the Horton type which permits the eccentric member to stop while the gear continues in motion in its proper direction but prevents movement of the eccentric-carrying member faster than the gear in the same direction. If the continuously rotating gear were accidentally turned backward it would be locked by the Horton clutch to the eccentric member 134 and would drive that backwardly, forcing the teeth 198 against the lever 200, damage being prevented in the present construction by the fact that the lever 200 can yield to permit the teeth to pass. Since the Horton clutch is provided with three rolls 212 located 120 degrees apart, the rolls all take hold equally and the work is evenly distributed between them.

The effect of this construction is that when the eccentric member 134 tends to move faster than the continuously driven gear 166, due to the reaction of the spring 64, the rolls 212 take hold and prevent forward movement of the eccentric member with respect to the driven gear. That is, the reaction of the spring is expended in driving the continuously driven gear ,forwardly in the direction in which the motor were not able to yield, it or other parts is tending to drive it. The spring there- This fact, in machines as pretore tends to speed up the motor faster than it would normally run. The speed-reducing gearing between the motor 178 and the eocentric 9t) acts, when motive force is thus reversely applied, as a brake in itself since the gears then become multi 'ilying gears instead of reducing gears. Moreover, to drive an electric motor t'aster than it is designed to run requires additional power, and to drive it at twice the speed at which it intended to run requires as much power as the motor will deliver when running at its normal speed. Hence, in the construction described, the motor acts as a powerful brake to retard the movement of the eccentric, the result being that the machine speeds up comparatively little beyond its normal speed while the heavy spring (A is reacting and the stop projection 138 of the clutch pawl releasing member engages the stop arm 12% without injurious shock. By this construction the energy of the reacting spring, instead of being dissipated as would be the case it a mechanical brake were used, is utilized to operate the motor as a generator and to feed current back into the line, thus etl'ecting economy of operation.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for forming the heel-seats of shoes for the reception of wood heels, the combination of a heel-seat die, a shoe support, means for effecting an initial relative movement of the die and shoe support so that the die and shoe may be placed in proper relative position and so held, power operated means for efi'ecting further relative movement of the shoe support and die including a powerful spring through which molding ot' the heel-seat by the die is effected, and means for moving the spring bodily relatively to the die to vary the pressure imparted to the die by the spring.

2. In a machine for forming the heel-seats of shoes for the reception of wood heels, the combination of a heel-seat. die, a shoe support, a treadle for relatively moving the die and shoe support so that the die and shoe may be placed in proper relative position and so held, power operated means for effecting further relative movement. of the shoe support and die including a powerful spring through which molding oil the heelseat by the die is etiected, said spring being normally untensioncd, and means for moving the spring, while still untensioned, bodily toward and from the die to vary the pressure imparted to the die by the spring.

3 In a machine for forming the heel-seats of shoes'for the reception of wood heels, the combination of a heel-seat die, a work support movable toward the die, a toggle for actuating the work support, a lost motion connection between the support and toggle,

manually operated mechanism for raising the support relatively to the toggle, a plungor to which one end of the toggle is connected, a light spring for sustaining the plunger, and a heavy sprin brought into action after compression of the light spring, for sustaining the toggle and causing it to ap ply pressure of the heavy spring to the work support.

4. In a machine for forming the heel-seats of shoes for the reception of wood heels, the combination of a heel-seat die, a shoe support. a still' spring, a toggle between the spring and the support, a lost motion con nection between the shoe support and the toggle, a treadle for moving the shoe support relatively to the toggle as permitted by said lost motion so that the shoe may be brought into proper relation to the die and so held, power means for operating the toggle to ell'ect melding of the hcel-seat by the die, and means for moving the spring relatively to the toggle to vary the pressure im parted to the die.

In a machine for forming the heel-seats of shoes for the reception of wood heels, the combination of a heel-seat die and a shoe support relatively movable for applying pressure to the work, a toggle for moving one of said parts, a heavy spring forming an abutment for one end of the toggle, said spring being tlIlttllSlUIlttl when the toggle is broken, and means for moving the spring bodily relatively to the toggle, while still untensioned, to cause the pressure produced by straightening the toggle to be varied.

(5. In a heel-seat forming machine, the combination of relatively movable members including a heel-seat die and a shoe support for applying pressure to the shoe, a toggle for moving one of said members, a heavy spring forming an abutment. tor one end of the toggle, means for moving the spring bodily to vary the pressure produced by straightening the toggle, and an indicator arranged to have a greater movement than that imparted to the spring and to indicate the position of the spring relatively to the toggle.

7. In a heel-seat forming machine, the combination of relatively movable members including a heel-seat; die and a shoe support for applying pressure to the shoe, a heavy spring, a toggle arranged between the spring and one of said members, means for moving the spring bodily relatively to the toggle to vary the pressure between said members, and means for holding the toggle in normal position when the spring is so adjusted.

8. In a machine of the class described, the combination of relatively movable members including a heel-seat die and a shoe support for applying pressure to the shoe, a heavy spring. a toggle arranged between the spring and one of said members, means for moving ill.-

spring. r

* toggleto provide lostmotion between the" a light spring the spring bodily relatively to the toggle, and a spring arranged 1I1S1Cl6 of the heavy spring for maintaining the toggle in normal position during adjustment of the heavy i "by said lost motion so that the shoe may be spring.

9. In a heel-seat forming machine, the combination oi relatively movable ii eii'ibers including a heel-seat, die and a shoe support for ap 'ilying pressure to the shoe, a toggle for moving one of SilltllllCllll'JQlS, a heavy spring forming an abutment for one endol the toggle, and a screw and gearingfarranged to be readily accessible to the operator for bodily moving the SlJl'lIlgtO vary the pres sure between said i'neinbers. i

10. In a machine for forming the. heelseats of shoesfor the reception of wood heels, the coiiibinationof a heel-seat die, a shoe support movable toward the die, a toggle for actuating the shoe support, a plunger to one end of which the toggle is connected, for siistaining the plungeil', a heavy spring arranged to be brought into action by compression of the light spring, and means for varying the amount of coiiipression of the light spring which will take place prior to COl'l'lpl'esSlOl l of the heavy 11. In a heelseat forming machine, the comlfiination of relatively movable members including a heel-seat die and a shoe support for applyingpressure to the shoe, a toggle for moving one of said members relatively to the" other, a lost motion connection between the toggle and said member, ahea-vy spring forming an abutment for the other end 01 thetoggle, means for sustaining the toggleand the spring, means tormoving the spring bodily to varythe amount of said lost motion and hence the pressure produced betweenthe pressure members by straightening the toggle, and a treadle tor-moving one pressure member relatively to the other, said movement being permitted by reason of said lost motion connection without aiiecting the toggle. p i V 12. In heel-seat forming machine, the combination of relatively movable members including a heel-seat die and a shoe support for applyingpressure to the shoe, a toggle for moving one of said members, a heavy spring forming an abutment for one end of the toggle, said spring and toggle having lost motion between them, means for sustaining the toggle before the lost motion is taken up, means for moving the spring bodily to vary the amount of lost motion and hence the pressure produced by said members by straightening the toggle, and power-operatedineans foractnating the toggle.

13. In a machine for forming the heelseats of shoes for the reception of wood heels, the combination of a heel'seat die, a shoe support, a st-ifi' spring, a toggle between the spring and the support, a lost motion connection between the shoe support and the toggle, a tr-eadle for moving the shoe support relatively to the toggle as permitted brought into proper relation to the die and so held, means for moving said spring relativclv to the tog le to var the )ressure l11lv parted to the die, means 101 maintaining the toggle in the same position irrespectively of the adjustment of said spring, and power means for operating the toggle to effect molding of the heel-seat by the die.

1st. In a machine "for forming the heel seats of boots and shoes, the combination of a heel-seat die, a shoe support, means including driving and driven members for moving the support to press a shoe, a power a heel-scat die, a shoe support, means in-- eluding driving and driven members tor moving the support to pressa shoe, :1 powerful spring for determining thepressure applied to the shoe, an eccentric on the driven member, a toggle operated by the eccentric between the spring and the shoe support, a

clutch between the driving and driven members, and means acting when the machine is restartedwith the spring under tension for preventing forward movement of the eccentric relatively to the driving member.

16. In a machine for forming the heelseats of boots and shoes, the combination of a heel-seat die, a shoe support, means includ* ing rotary driving and driven members for relatively moving the die and support to press a shoe, a powerful spring by compressioii 0t which the pressure'is applied, clutch means between said driving and driven members for turniiigthe driven member ,in one directionito compress the spring, and means acting when the machine is restarted with the spring under compression for positively preventing forward movement or the driven member relatively to the driving member.

17. In a machine for forming the heelseats of boots and shoes, the con'ibination of a heel-seat die, a shoe support, mechanism including rotary driving and driven members for relatively moving the die and support to press a shoe, a powerful spring for determining the pressure so applied, clutch means between said driving and driven members for turning the driven member in one direction to compress the spring, and

additional clutch means acting when the machine is restarted with the spring under tension tor positively preventing forward movement of the driven member relatively to the driving member.

18. In a machine for forming the heelseats of boots and shoes, the combination of a heel-seat die and a shoe support relatively movable for applying pressure to a shoe bottom, a heavy spring by compression of which such pressure is produced, a motor and gearing tor compressing the spring, and means between the spring and motor for absorbing the reaction of the compressed spring by applying it to drive the motor faster in the direction in which it is running.

19. In a machine For forming the heel seats of shoes. the combination of relatively movable members including a heel-seat die and a shoe support for applying pressure to the heel-seat, a heavy spring by compression of which such pressure is produced, a motor and gearing including an eccentric for compressing the spring, and means between the eccentric and the motor for applying the reaction of the. compressed spring to drive. the motor faster in the direction in which it is running.

20. In a machine of the class described, the combination of members for applying pressure to the shoe bottom, rotary driving and driven members, a heavy spring by compression of which pressure on the shoe is produced, a motor and gearing for operating the driving member. and means for utilizing the tendency of the driven member, during the reaction ot the pressure spring, to run ahead of the driving member to speed up the motor.

21. In a machine of the class described, the combination of relatively movable members tor applying pressure to the shoe bottom, a heavy spring by COII'IPYQSSlOl] of which such pressure is produced, a motor and gearing for compressing the spring, and means between the spring and the motor for absorbing reaction of the compressed spring by applying it to drive the motor faster in the direction in which it is running.

22. In a machine for forming the heelseats of boots and shoes, the combination of a heel-seat die, a shoe support, means including rotary driving and driven members for relatively moving the die and support to press a shoe, a powerful spring by compression of which the pressure is applied, clutch means between said driving and driven members for turning the driven member in one direction to compress the spring, and means acting normally to prevent reverse movement ol the driven member, said means being constructed and arranged to yield under excessive strain to prevent breakage of parts.

523. In a machine for forming the heelseats of boots and shoes, the. combination of a heel-seat die, a shoe support, means including driving and driven members for moving the support to press a shoe, a powerful spring for determining the pressure applied to the shoe, one-way clutch means between the driving and driven members through which the driven member is turned forwardly, a second one-way clutch means for driving the driven member by which the driven member is prevented from being driven faster than the driving member while the spring reacting, and a yielding oneway clutch between the driven member and the machine frame normally preventing backward turning of the driven member from stopped position.

24. In a machine for forming the heelseats of boots and shoes, the combination of a heel-seat die, a shoe support, means ineluding driving and driven members for moving the support to press a shoe, a powerin] spring for determining the pressure applied to the shoe, an eccentric on the driven member, a toggle operated by the eccentric between the spring and the shoe support, a clutch between the driving and driven members to stop the machine with the pressure applied, a tooth engaging a notch in the driven member normally to prevent backward l'noven'ient of the member, and a spring for holding the tooth in operative position, said spring permitting the tooth to yield and allow backward movement of the driven member under excessive strain.

In testimony whereof we have signed our names to this specification.

MILTON H. BA LLARD. THOMAS H. SEELY.

DISCLAIMER.

1,674,O85.M'L'Zt0n H. Ballard, Beverly, Mass, and Thomas H. Seely, Melrose, Mass.

MACHINE FOR OPERATING ON FOOTWEAR. Patent dated June 19, 1928. Disclaimer filed February 16, 1929, by the assignee, United Shoe Machinery Corporation.

Hereby enters this disclaimer to said claim 15 of said Letters Patent, which is in the following words, to Wit:

15. In a machine for forming the heel-seats of boots and shoes, the combination of a heel-seat die, a shoe support, means including driving and driven members for moving the support to press a shoe, a powerful spring for determining the pressure applied to the shoe, an eccentric on the driven member, a toggle operated by the eccentric between the spring and the shoe support, a clutch between the driving and driven members, and means acting when the machine is restarted With the spring under tension for preventing forward movement of the eccentric relatively to the driving member. I [Ofiicial Gazette March 5 1.929.]

Images