US2173964A - Heel-attaching machine - Google Patents

Description

p 1939- .1. GOULDBOURN El A1. 2,173,964

HEEL-ATTACHING MACHINE Filed May 18, 1938 6 Sheets-Sheet 1 p 26 1939. J. GOULD'BOURN ET AL 2,113 964 HEEL-ATTACHING MACHINE Filed May 18, 1938 6 Sheets-Sheet 2 p 26, 1939. J. GOULDBOURN AL' 2,173,964

HEEL-ATTACHING MACHINE Filed May 18, 1938 e sh eet-Sheet 5 I WVE/VTURE W QKM Se t. 26, 1939. J. GOULDBOURN ET AL HEEL-ATTACHING MACHINE Filed Ma 18, 1938 s Sheets-Sheet 4 Fig Z p 26, 1939- J. GOULDBOURN mm. 4

HEEL-ATTACHING MACHINE Filed May 18, 1938 6 Sheets-Sheet 5 Sept. 26, 1939. J. GOULDBOURN Er AL HEEL-ATTACHING MACHINE Filed May 18, 1938 6 Sheets-Sheet 6 M Z/QM C, $40-14; @44- Patented Sept. 26, 1939 UNITED STATES PATENT OFFICE Machinery C'orporatiomPaterson, N. J., a corporation of New Jersey Application May 18, 1938, Serial No. 208,628 In Great Britain July 31, 1937 32 Claims.

This invention is concerned with improvements in machines for attaching heels to shoes. The term heel, as used herein, may indicate either a completed heel or a part thereof, such as a top-piece. The invention is of especial utility in connection with machines adapted to attach a heel to a shoe by such fastenings as nails driven through the heel into the shoe and also to secure a top-piece to the attached heel.

Machines of the character above indicated are generally capable of performing both the attaching operations only when the operator has caused the machine to perform two distinct operating cycles under power and controlled by two treadle-depressions. In accordance with one of the several features of the invention, there is provided a novel machine which, on a single depression of the treadle, is effective automatically to perform in sequence the operations of heelattaching and top-piece-securing. This reduces the eifort required in operating the machine and therefore increases the output.

The above and other features of the invention, including those relating to the positioning of 2, heel-parts, as by the operation of a swing-plate having heeland top-piece-holders, will become evident from the following description of an illustrative machine in which the several features are included.

In the accompanying drawings of a particular embodiment of our invention:

Fig. l is a side elevation taken from the left of the illustrative machine, this figure being to a smaller scale than the succeeding figures;

Fig. 2, a side elevation of the lower portion of the machine;

Fig. 3, a rear elevation corresponding to Fig. 2;

Fig. 4, a section on the line IVIV of Fig. 2;

Fig. 5, a sectional plan, showing chiefly the Al) swing-plate of the machine and more closely associated parts;

Fig. 6 a plan view of manual controlling means for the pressure mechanism, seen also in Fig. 1;

Fig. 7, a side elevation taken from the left in Fig. 6;

Fig. 8, a view, chiefly in section, on the line VIIIVIII in Fig. 5, and

Fig. 9, a left-hand side elevation to a smaller scale than Figs. 2 to 8, showing in particular a gear of the machine having cam-tracks.

A lasted shoe which is to be operated upon is presented to the machine, bottom downward and heel-end to the rear, the crown of the last being engaged during the operation of themachine by a reciprocatory pressure-head I (Fig. l) The shoe may be positioned by a band-clamp 3 with which the back and sides of the heel-end of the upper contact. The machine is shown as equipped for attaching a heel and thereafter applying a top-piece to the attached heel, there being provided a swinging heel-holder l9, 2| and a top-piece-holder 23, 25, hereinafter more particularly described. These holders are carried by a swing-plate 5 arranged over a nailingblock 'I, through holes in which nails are driven through the heel into the shoe in the attachment of the heel (Fig. 5).

There will first be outlined briefly the manner of operation of such a machine of known characteristics and thereafter our invention described as applied to it. At the conclusion of an operating cycle, the machine comes to rest with the top-piece-holder positioning device 23, 25 of the swing-plate 5 in its active position above the nailing-block. A pivoted nail-transferring device or loader 9, which will previously have been supplied with nails, either manually or by an automatic distributor, will be swung manually over the block. Then a heel will be placed in the holder l9, 2| and a top-piece in the holder 23, 25. During the movement of the loader between the nail-receiving position and the delivering position, the nails are retained by a movable gate or shutter ll. When the loader reaches a position in which its nail-carrying openings register with those in the block I, the gate H is released for spring-movement to allow the nails to fall into the nailing-block. The swing-plate 5 is so connected to the loader 9 that when the latter is moved into position over the nailing-block i, it causes movement of the swing-plate to carry the top-piece-holder to the right and to bring the heel-holder into active position, as appears in Fig. 5. The heel-holder presents a space through which the nails may fall. In the nail-delivering travel of the loader, a stud i3 whichit carries moves along an inclined surface of a cam member l5 (Fig. 1) connected with a slide I'I carrying the band-clamp. This is effective to lift the band-clamp well above the nailing-block. After the delivery of nails to the block, the loader is swung reversely, and when it is just clear of the block, but before it has moved sufficiently toward its receiving position to allow the band-clamp to move downwardly, a heel H is inserted in the heel-holder. The band-clamp is at this stage sufficiently elevated by the stud l3 and cam I5 to give plenty of room for the application of the heel. The heelholder may comprise the spring-actuated breastbar I9 and the spring-pressed rear fork 2I. The loader is then swung fully to its nail-receiving position, and, during this movement, the gate II is latched once more in nail-retaining relation, and the band-clamp is allowed to move downwardly toward the heel H positioned upon the swing-plate. Next, a top-piece T is inserted in the holder 23, 25, it being located by the springactuated breast-bar 23 and the spring-pressed rear fork 25.

The operation now inserts a shoe, bottom down, rearwardly, so that the band-clamp embraces the lower margin of the upper at the sides and rear of the heel-end, the heel-seat of the shoe being then located just above the attaching face of the heel in the holder I9, 2I. If the shoe is of a style which requires the band-clamp to be swung laterally in accordance with whether the shoe is a right or a left, a hand-lever 21 provided for this purpose will be operated. The treadle 29 of the machine is next depressed. The movement is first effective to lower the head I into engagement with the cone of the last in the shoe to apply preliminary pressure of the shoe to the heel, the band-clamp 3 being moved downwardly at the same time and its sides being carried toward each other to grip the shoe between them, the gripping movement being concluded before the band-clamp is fully lowered. The treadle 29 is pivotally connected to an upwardly extending treadle-rod 3| (Figs. 1 and which is lifted when the treadle is depressed. and which at its upper end is pivotally connected to an arm 33, the forward end of which is fixed to a rockshaft35 extending laterally of the machine. This is as in Letters Patent of the United States No. 2,085,851, Gouldbourn et al., July 6, 1937. The rockshaft 35 carries a rearwardly projecting arm 31 pivotally connected, through a link 39 hereinafter described, to an upwardly extending rod II. The rod is coupled by elements 49 and 41 to an arm 43 having gear-teeth 45 on its forward end meshing with a rack 46 upon a vertically movable plunger 5I carrying the pressure-head I. The treadle is thus effective to move the arm 43 to lower the plunger and force the head against the last within the shoe being operated upon. The lowering of the band-clamp is effected by connections to the plunger consisting of the slide H, the link 53 and the lever 55. It is closed upon the shoe by the link 51, the bell-crank-lever 59 and the toggle- lever 63, 65, the element 65 being joined to the arm 31.

When the first part of the depression of the treadle 29 has been completed to effect lowering of the pressure-head I and lowering and closing of the band-clamp 3, further depression is effective to trip the clutch of the machine and initiate its power-operation. Once the clutch has been tripped, the operator may release the treadle, since the operation of the machine will proceed independently of the treadle, and the clutch will be disengaged automatically at the end of the operating cycle. During this power-operation, the sequence of events is as follows. The head I applies a definite final or clamping pressure to force the shoe and heel firmly together. The heel-attaching nails are then driven from the block 7 through the heel and into the shoe, their end-portions being left slightly projecting from the bottom of the heel to receive the top-piece. The head I, and therefore the band-clamp 3, are then raised by automatically operating toggle means, as hereinafter described and without calling for any further act on the part of the oper ator, through a predetermined distance, conveniently about three-quarters of an inch. During this movement, the arm 31 remains stationary, and thus the side-portions of the band-clamp 3 do not separate to release their hold on the shoe, which is therefore properly positioned. As the shoe is moved upwardly, the drivers in the block I are retracted. Further, at this time, the swing-plate 5 of the machine is tripped, by means to be described, and it is swung under springaction toward the left, so that the heel-holder I9, 2| is moved to the left from above the block, and the holder 23, 25 moves the top-piece carried by it over the block and underneath the attached heel. The elevation of the heel from the nailingblock previously mentioned, allows sufiicient clearance for the top-piece to be brought beneath the heel. When the top-piece is thus positioned, the head I is moved down by a return movement of the previously mentioned toggle means, taking the band-clamp and the shoe with it, so that the bottom of the heel exerts preliminary pressure upon the top-piece. Before the completion of the return movement of the toggle means, the head I places upon the work the same predetermined final pressure as was applied prior to the driving of the heel-attaching nails. This causes the toppiece to be forced upon the ends of the nails projecting from the heel and thus secured thereto. Finally, the head I is raised to the top of its stroke, and the clutch of the machine is automatically disengaged. At this time, the rod 4| is allowed to descend, so that the head is returned to its original fully elevated position, the bandclamp moving upwardly with it and opening to release the shoe, which is then removed, leaving the machine ready for the succeeding operation. The construction and arrangement of various parts of the machine which effect the movements above outlined will now be described.

At the rear of the machine is a constantly driven pulley 61, which may be connected to the main shaft 69 of the machine by a clutch KI (Fig. 3) actuated from the treadle 29, which effects the clutching only after said treadle has been depressed to efiect the preliminary lowering of the head I. The treadle is pivoted on a stud 13 carried by a lever which is itself pivoted on a stud TI to the frame (Fig. 2). During the first part of its depression, the treadle turns about the stud I3, and, on the further depression, it moves with said lever I5 about the stud TI to actuate the clutch through a rod 18. The shaft 69 has two pinions fixed thereto, the pinion I9 meshing with a gear 8| fixed to a shaft 83 journaled in the frame below the shaft 59, and the pinion 85 meshing with a gear 81 rotatable about the shaft 83. The gear 8I turns the shaft 83 at a speed which is in the ratio of two to five to the speed of the main shaft. The gear 8'! is rotated on the shaft 83 at a speed which is in the ratio of one to five to the speed of the main shaft, or half that of the gear 8|. The shaft 83 has secured to it a crank 89 connected by a link 9| to a member 93 pivoted on a stud 95 and which has a cam-surface 9'! engaged by a roll 99 carried by a plunger I 0| which operates the nail-drivers of the machine.

. Fast on the gear 81 is a sleeve I03 on which is fixed a stop-cam I05. This cam so acts upon a roll m on a lever I09 fulcrumed on the frame that it is efiective to throw out the clutch H when the gear 81 has made one revolution. Thus, during each operating cycle of the machine, the gear 81 rotates once, the gear 8| and the shaft 83 rotate twice, while the main shaft 69 is being turned by the driving pulley 61 five times. In the gear 81 are formed two cam-tracks. The outer, I I I (Fig. 9) receives a roll H3 at the lower end of a lever Il5 fulcrumed about a rockshaft II1 journaled transversely of the machine-frame. The lever I I5 extends rearwardly from the rockshaft I I1 and is pivotally connected to the lower end of a rod I I9, the upper end of which is joined to a lever I2I (Fig. 1) which is effective to apply clamping pressure to the work, as in the patent to Gouldbourn et al. The cam-track III is so shaped that during one revolution of the gear 81, the head I has the two downward and upward movements imparted to it, which are respectively for effecting the final pressing of the heel on the shoe and the top-piece on the heel.

In the inner cam-track I23 of the gear 81 is a roll I25 on one arm I21 of a bell-oranklever which is fixed within the frame to the rockshaft H1. The other arm I29 of the lever is connected by a bolt I3I, which passes through an arcuate slot I33 in the frame, with the lower end of a lever I 35 (Fig. 3) fixed to the rockshaft H1. The lever I35 and the bell-crank-lever I21, I29 move together and, in effect, may be regarded as a single element. The lever I35 has an upwardly extending portion which is connected, by means hereinafter described, with the rearward end of a link I31 of adjustable length (Fig. 1), which extends forwardly and at its forward end is pivotally connected to a stud I39 at the lower end of the rod 4|. Also pivotally connected to the stud I39 is the upper end of the link 39, the lower end of which is joined to the arm 31, as already mentioned. The link 39 and the rod 4|, in effect, furnish the arms of a toggle, and the arrangement is such that this toggle is normally substantially straight but is broken to cause'the automatic lift of the head I and the band-clamp 3, which occurs between the heel-attaching and top-piece-securing operations. After the treadle 29 has been depressed through the first part of its stroke, and the power operation of the machine begins, means hereinafter described is brought into operation to lock the lower end of the link 39 positively in its treadle-produced position against upward movement and to prevent it moving downwardly, except under considerable pressure. When the stage is reached at which it is desired to lift the head I and band-clamp 3 to allow the top-piece to bebrought under the heel, the lever I35, which is controlled from the cam-track I23, pulls the link I31 rearwardly. Since the lower end of the link 39 is then prevented from moving upwardly, the rod M will be moved downward, and this will be effective through parts already described to raise the head and band-clamp 3. After the top-piece has been positioned below the heel, the upper end of the lever I35 moves forward, again straightening the toggle 39, M and causing the head and band-clamp to be moved downwardly once again to press the bottom of the heel on the shoe against the top-piece. It will be realized that owing to the thickness of the top-piece andthe swing-plate 5 on which it is carried, the head I will not move downward to the level it occupied during the heelattaching operation. Therefore, to prevent undue strain as the toggle is straightened, the lower end of the link 39 is permitted to move downwardly under pressure.

The means for locking the lower end of the link 39 against upward movement while permitting it to move downwardly under pressure is as follows. Fixed tothe side of the frame isacasing MI in which is formed a cylinder I43 (Figs. 1 and 8). In this cylinder is movable a piston I from which a piston-rod I41 extends upwardly. This rod passes through the top of the casing and has at its upper end a member I49 in which is a hori zontal slot I5I receiving a sliding block I53 attached to one end of a stud I55, the opposite end of which furnishes the pivot between the link 39. and the arm 31. A passage I51 is provided in the casing I4I connecting the opposite ends of the cylinder I 43. The passage I51 and the cylinder I43 are full of a fluid, which may be oil, and a valve-body I59 is provided in the passage controlled by a valve-head I6I at the lower end of a valve-rod I63 pressed down by a spring I 65 which tends to maintain the valve closed. The upper end of the valve-rod has a slot I61 in which is a roll I69 mounted on an arm I1I, which at its forward end is pivoted to a stud I13 upon a coverplate I15 which closes the casing I4 I. At its rearward end, the arm I1I carries a pin I11 entering a slot I19 formed in a member I8I secured to the upper end of a vertical link I83, which at its lower end is connected to the clutch-disengaging lever I69 (Fig. 2). The arrangement is such that when the clutch H of the machine is not engaged, the valve-rod I63 is maintained in an upward position in which the valve is open. Under these circumstances, the piston I45 is permitted to move in its cylinder, the oil circulating freely in the passage I51. Flow of oil to and from a reservoir I85 in. the casing from or to the passage I51 and cylinder I43 is permitted through a bore I81 in the valve-rod I63. This compensates for changes in the effective volume of the cylinder and passage due to movement of the piston-rod I41 and valverod I63. When the valve I59 is open, the pistonrod I41 does not interfere with movement of the arm 31, consequent upon the first part of the depression of the treadle 29. When, however, the clutch H of the machine is engaged, the valverod I63 is allowed to move downwardly to close the valve. This looks the piston against upward movement, since any tendency toward such movement serves, through the oil, to force the valvehead I6I more firmly against its seat. Thus, at

the time that the lever I35 is actuated to break the toggle 39, M, the lower end of the link 39 is locked against upward movement by the pistonrod. When, however, the toggle is again straightened during the operation of the machine, the link is permitted to move downwardly under pressure, since the piston-rod I41 is capable of downward movement when a predetermined pressure is reached. This pressure is that necessary to open the valve I59 in the passage I51 by raising the head I6I from its seat against the action of the spring I65. When, at the end of an operating cycle of the machine, the clutch 1| is automatically disengaged, as hereinbefore described, the lever I09 is swung in such direction that the valve-rod I63 is raised against its spring, thereby opening the valve I59 and allowing the machine to stop in a condition in which the lower end of the link 39 is capable of moving at the beginningof the next operation of the machine under the action of the arm 31.

In heel-attaching machines, it has been usual when a swing-plate carrying a heel-holder and a top-piece-holder is provided, to arrange that the swing-plate, isshifted by a spring from the position in which the heel-holder is above the nailing-block to that in which the top-piece holder is positioned above the block, The spring is tensioned or loadedwhen thenaile-transferring de- 75,

vice is moved manually from its nail-receiving to its nail-delivering position, and this may cause the effort of moving the transferring device to be undesirably heavy. In the illustrative machine, which automatically performs the heel-attaching and top-piece-securing operations in sequence, it is desirable that the swing-plate 5 should be moved quickly between the position in which the heel-holder I9, 2| is above the nailing block I and that in which the top-pieceholder 23, 25 is thus positioned. In the present machine, this movement is also effected by spring means, which should be capable of rapid action. If the main effort of loading said spring means had to be performed manually, it might be undesirably large. Accordingly, we provide an arrangement whereby the loading of the spring is performed largely under the: power of the machine. At the rear, the swing-plate 5 is fixed to the upper end of a vertical shaft I89 (Fig. 5) which is journaled in bearings adjacent to the nailing-block I. Fixed to the shaft is a short arm I9I to which is pivotally connected one end of a link I93, the other end of which is joined by a pin-and-slot connection I95 to the nailtransferring device 9, which is pivotally mounted for movement about a vertical shaft I9I at the rear and to the right of the shaft I89. The organization is such that as the nail-transferring device is moved over the nailing-block, the link I93 is effective to shift the swing-plate 5 counterclockwise, as viewed from above, to remove the top-piece-holder from above the nailing-block and bring the heel-holder into position above the block. The shaft I89 to which the swingplate 5 is fixed has fast upon it an arm I99 extending toward the right. To the end of this arm I99 is attached a tension-spring 201, which at its forward end is connected to the nailing-block. As the swing-plate is moved by the nail-transferring device 9, this spring 20I is tensioned, but it is comparatively weak and offers no marked resistance to the movement of the transferring device. When the swing-plate 5 has reached the position in which the top-piece-holder is above the nailing-block, a latch 203 (Fig. 5) is effective to retain it until it is released, as will be described. Secured to the shaft I89 is a second arm 205, and to this arm is pivotally connected a swing-plate-actuating rod 201 which extends into the frame. This rod passes through a hole in a stud 209 connected with the lever I35 (Figs. 6 and 7). Fixed upon the rod is a collar 2, and surrounding the rod between this collar and the stud is a compression-spring 2I3. As the upper end of the lever I35 is moved rearwardly by the cam I23 to break the toggle 39, 4|, the stud compresses the spring 2 I3. The spring, as it is compressed, tends to move the swing-plateactuating rod 201 rearwardly, but this rod is prevented from moving in this direction because the swing-plate 5 is held by the latch 203. This latch is pivoted on a fixed pin 2I5 and has a hooked end-portion 2II lying in the path of movement of the rod 4| as this rod is moved to break the toggle 39, 4| and lift the head I. The arrangement is such that when the lower end of the rod has almost completed its movement toward the rear during the breaking of the toggle, at which time the head I of the machine has been raised substantially to the full extent for this stage in the operation of the machine, and the spring 2I3 has been loaded, it contacts with a screw 2I9 threaded into the portion 2|! of the latch to cause release of said latch. A torsionspring22I' about the pin 2I5 urges the latch 203 toward its active position. Upon release of the latch, the swing-plate-actuating rod 201 is pulled quickly to the rear by its spring 2 I3, so shifting the swing-plate that the top-piece-holder is above the nailing-block I. The swing-plate may be prevented from striking violently against the stop-surface at the end of its travel by connection to a small piston (not shown) forming part of an air-check, which does not interfere with the rapid movement of the swing-plate.

The means whereby the upper end of the lever I35 is connected to the link I3'I which joins it to the toggle 39, 4| will now be described more fully. Pivotally connected to a stud 223 on the upper end of the lever I35 is a bell-crank-lever, one double arm 225 of which (Figs. 6 and '7) extends rearwardly and carries the stud 209, to which are connected the link I31 and the rod 201. other arm 22'! of the bell-crank-lever extends upwardly and carries a hand-knob 229. Also attached to the arm 22'! isthe upper end of a spring 23I lying normally, as shown in Fig. 7, to the rear of the pivot-stud 223, with its lower end joined to a pin 233 on the lever I35. In this relation, the spring tends to hold the arm 225 of the bell-crank-lever extending rearwardly and resting against a lug 234 upon the lever I35, and when the lever I35 is moved rearwardly to break the toggle 39, 4|, the pull is transmitted through i the bell-crank-lever to the link I3! which is joined to the center of the toggle. Now, it may sometimes be desired to operate the machine so that during the operating cycle, the toggle 39, 9| is not broken to lift the head I. To this end, the hand-knob 229 on the bell-crank-lever is moved by the operator to swing the bell-crank-lever clockwise about its pivot, as viewed in Fig. 7. The spring 23I is thereby carried in front of the lever-pivot and tends to hold the arm 225 in its new position against a stop 235 fixed to the frame of the machine. When the parts are thus related, and the upper end of the lever I35 is moved rearwardly during the operation of the machine, no effective rearward pull is imparted to the link I31 joined to the center of the toggle 39, 4|. This is because the bell-crank- lever 225, 221 will merely swing about its pivot without imparting to the link I31 sufiicient pull to break the toggle,

which may be so arranged that under these cir- I cumstances, its center is very slightly in advance of its dead-center line. Thus, the lever I35 merely moves idly, and the toggle is not broken to lift the head I. This control may be utilized if it is desired to attach a heel to a shoe without securing a top-piece to the heel. With the parts so arranged, since the lower end of the rod 4| forming the upper member of the toggle 39, 4| will not be moved rearwardly, the swing-plate 5 will not be unlatched but will remain during the whole operation of the machine with the heelholder I9, 2| above the nailing-block I. In the ordinary way, the pressure-head I will be moved down twice during the operating cycle, so that the Work will be subjected in succession to two compressing operations. It may sometimes be desired to use the machine merely to secure a top-piece to an already attached heel; for example, if a faulty top-piece has been initially attached, and this has been removed and is to be replaced by another. Under these circumstances, also, the machine will be adjusted so that the toggle 39, 4| is not broken during its operation. In this case, the swing-plate 5 will be located during the whole operation with the top The;

piece-holder above the nailing-block I. When such operation is performed, it will be found that the two compressing operations to which the work is subjected during the operating cycle are effective in giving very secure attachment of the top-piece. It will be realized that the actuation of the hand-knob 229 to change the machine from a condition in which the automatic lift of the head I takes place into one in which the lift does not occur, or vice versa, may be effected rapidly by the operator, merely by a quick movement of his hand.

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

1. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable to force the work toward the attaching mechanism, operator-actuated means for moving the member to apply preliminary pressure to the work, means movable under the power of the machine for actuating the member a plurality of times during each operating cycle to apply final pressure to the work, and means for retracting the member between the applications of final pressure.

2. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable to force the work toward the attaching mechanism, operator-actuated means for moving the member from an initial position into engagement with the work, means movable under the power of the machine twice during each operating cycle to force the member against the work from such engaging position, and means for withdrawing the member from engagement with the work between the power-applications of pressure.

3. In a heel-nailing machine, a nailing-block, a movable pressure-head co-operating therewith, a treadle, connections to the treadle by which the head may be moved into engagement with the work upon the block, and means acting under the power of the machine upon the connections between the treadle and head to withdraw said head from engagement with the work.

4. In a heel-nailing machine, a nailing-block, a movable pressure-head co-operating therewith, a treadle, connections to the treadle and. including the arms of a toggle by which with said arms in substantial alinement the head may be moved into engagement with the work upon the block, and means acting under the power of the machine for breaking the toggle.

5. In a heel-nailing machine, a nailing-block, a plunger movable toward and from the block, a pressure-head carried by the plunger and cooperating with the block, a treadle, a member actuated by the treadle and by which the plunger is moved toward and from the block, a member movable under the power of the machine and by which the plunger is moved toward and from the block twice during each operating cycle, means including a toggle for connecting the treadle to the member which it actuates, and means for breaking the toggle between the power movements of the plunger.

6. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable toward and from the attaching mechanism, elements through which the member is moved, means for allowing the elements toyield, and means made effective during the operation of the machine for varying the resistance offered by the yieldable means,

7. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable toward and from the attaching mechanism, elements through which the member is moved, means for allowing the elements to yield, power means by which the machine is operated, a controlling member for the power means, and means connected to the controlling member for varying the resistance ofiered by the yieldable means.

8. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable toward and from the attaching mechanism, elements through which the member is moved, means for allowing the elements to yield, operator-actuated means acting upon the elements to move the member, means acting upon the elements to move the member under the power of the machine, and means for increasing the resistance ofiered by the yieldable means during the power operation of the member.

9. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable toward and from the attaching mechanism, elements through which the member is moved, and fluid means for allowing one of the elements to yield after the travel of the pressure member has been arrested by engagement with the Work,

10. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable toward and from the attaching mechanism, elements through which the member is moved, fluid means for allowing one of the elements to yield, and means movable under the power of the machine for varying the resistance of the fluid means to movement.

11. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable toward and from the attaching mechanism, a lever system connected to the pressure member, plural actuating members connected to the lever system, an hydraulic device to which one extremity of the lever system is joined, and means for varying the resistance to movement offered by the hydraulic device for different actuating members.

12. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable toward and from the attaching mechanism, a lever system connected to the pressure member, an actuating member connected to the lever system, a piston to which one extremity of the lever system is joined, a cylinder containing a fluid and in which the piston operates, and means for controlling the flow of fluid between the opposite extremities of the cylinder.

13. Ina heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable toward and from the attaching mechanism, a lever system connected to the pressure member, an actuating member connected to the lever system, a piston to which one extremity of the lever system is joined, a cylinder containing a fluid and in which the piston operates, and means yieldable upon the application of a predetermined pressure for controlling the flow of fluid between the opposite extremities of the cylinder.

14. In a heel-nailing machine, a nailing-block, a movable pressure-head co-operating therewith, moving means for the pressure-head including a toggle, means for straightening and breaking the toggle under the power of the machine, and a treadle joined to the toggle to operate the head-moving means in the straightened condition of the toggle.

15. In a heel-nailing machine, a nailing-block, a movable pressure-head co-operating therewith, a toggle connected at one extremity to the head, a piston connected to the opposite end of the toggle, a cylinder in which the piston is movable, and means for varying the resistance of the piston to movement in the cylinder.

16. In a heel-nailing machine, a nailing-block, a movable pressure-head co-operating therewith, a toggle connected at one extremity to the head, a piston connected to the opposite end of the toggle, a cylinder in which the piston is movable, and means connected to the center of the toggle and movable under the power of the machine for straightening and breaking said toggle.

17. In a heel-nailing machine, a nailing-block, a movable pressure-head co-operating therewith, a toggle connected at one extremity to the head, a piston connected to the opposite end of the toggle, a cylinder in which the piston is movable, and a valve movable under the power of the machine for varying the flow between the opposite sides of the piston.

18. In a heel-nailing machine, a nailing-block, a movable pressure-head co-operating therewith, a toggle connected at one extremity to the head, a piston connected to the opposite end of the toggle, a cylinder in which the piston is movable, a valve movable under the power of the machine for varying the flow between the opposite sides of the piston, and a spring by which the valve is held initially upon its seat.

19. In a heel-attaching machine, attaching mechanism for plural heel-parts, a movable device provided with plural holders for successively presenting heel-parts to the attaching mechanism, means including a spring for moving the device, and means movable under the power of the machine for loading the spring to prepare it for its action upon the device.

20. In a heel-attaching machine, attaching mechanism for plural heel-parts, a movable device provided with plural holders for successively presenting heel-parts to the attaching mechanism, means actuated by the operator for moving the device in one direction, means for temporarily retaining the device in the position to which it is thus moved, and means for moving the device in the opposite direction by power resulting from the operation of the machine.

21. In a heel-attaching machine, attaching means for. heel-parts, a pressure member movable to force the work toward the attaching mechanism, means for moving the pressure member, a movable device provided with a plurality of holders for successively presenting heel-parts to the attaching mechanism, means including a spring for moving the device, and means actuated by the moving means for the pressure member for loading the spring.

22. In a heel-attaching machine, attaching means for heel-parts, a pressure member movable to force the work toward the attaching mechanism, means for moving the pressure member, a movable device provided with a plurality of holders for successively presenting heel-parts to the attaching mechanism, means including a spring for moving the device, means actuated by the moving means for the pressure member for loading the spring, means for retaining the device against the force of the spring, and means acting under the power of the machine for releasing the retaining means.

23. In a heel-attaching machine, attaching means for heel-parts, a pressure member movable to force the Work toward the attaching mechanism, means for moving the pressure member, a movable device provided with a plurality of holders for successively presenting heel-parts to the attaching mechanism, means including a spring for moving the device, means actuated by the moving means for the pressure member for loading the spring, means for retaining the device against the force of the spring, and means actuated by the moving means for the pressure member for releasing the retaining means.

24. In a heel-attaching machine, attaching means for heel-parts, a pressure member movable to force the work toward the attaching mechanism, means for moving the pressure member, a movable device provided with a plurality of holders for successively presenting heel-parts to the attaching mechanism, means including a spring for moving the device, means for retaining the device against the force of the spring, a second spring, and means for loading the second spring under the power of the machine to prepare it for its action upon the device.

25. In a heel-nailing machine, a nailing-block, a swing-plate having heeland top-lift-holders for presentation to the nailing-block, a spring joining the swing-plate to a relatively fixed point, a latch for holding the swing-plate against the force of the spring, a rod connected to the swingplate, a spring surrounding the rod, means for moving the rod under the power of the machine to compress the spring, and means acting under the power of the machine for releasing the latch.

26. In a heel-nailing machine, a nailing-block, a movable pressure-head co-operating therewith, a lever by which the head is moved toward and from the block, a member movable under the power of the machine for actuating the lever, a swing-plate having a heel-holder and a top-liftholder, a spring for moving the swing-plate, said spring being loaded by movement of the actuating member, and a latch for retaining the swingplate against the force of the spring, the latch being released in the movement of the lever.

27. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable to force the work toward the attaching mechanism, means for producing initial and final movement of the pressure member toward and from the attaching mechanism, means for producing under the power of the machine intermediate movements of the pressure member from and toward the attaching mechanism, and means controlled by the operator for preventing the action of the intermediate movement-producing means while the first-mentioned movements may continue.

28. In a heel-attaching machine, attaching mechanism for heel-parts, a pressure member movable to force the work toward the attaching mechanism, means for producing initial and final movement of the pressure member toward and from the attaching mechanism, means for producing under the power of the machine intermediate movements of the pressure member from and toward the attaching mechanism, means movable during such intermediate movements to present a heel-part to the pressure mechanism, and means controlled by the operator for preventing the action of the intermediate movement-producing means and the movement of the presenting means.

29, In a heel-nailing machine, a nailing-block,

a pressure-head movable toward and from the nailing-block, a transmitting member connected to the head, a transmitting member movable under the power of the machine, and a member in constant connection with both transmitting members and movable by the operator into either of two positions, in one of which it renders the transmitting members effective and in the other of which they are inefiective.

30. In a heel-nailing machine, a nailing-block, a pressure-head movable toward and from the nailing-block, a transmitting member connected to the head, a transmitting member movable under the power of the machine, a swing-plate having heeland top-lift-holders and being movable under the influence of the transmitting members, and a member connecting the twotransmitting members and movable by the operator into either of two positions, in one of which it renders the transmitting members efiective to cause movement of the pressure-head and swing-plate and in the other of which they are inefiective.

31. In a heel-nailing machine, a nailing-block, a pressure-head movable toward and from the nailing-block, a lever movable under the power of the machine, a lever connected to the pressure-head, a bell-crank fulcrumed upon one of the levers, a link joining the bell-crank to the other lever, and means arranged to hold the bellcrank in either of two extreme positions.

32. In a heel-nailing machine, a nailing-block,

a pressure-head movable toward and from the nailing-block, a lever movable under the power of the machine, a lever connected to the pressure-head, a bell-crank fulcrumed upon one of the levers, a link joining the bell-crank to the other lever, and a spring connecting an arm of the bell-crank to the lever upon which it is mounted and adapted to hold said bell-crank in one position in which it transmits the power of the machine to the head and in another in which it may oscillate idly.

JOSEPH GOULDBOURN.

THOMAS AUBREY KESTELL.

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