US1939648A - Fastening-inserting machine - Google Patents

Description

Dec. 19, 1933. 1 w ASHLEY 1,939,648

FASTENING-INSERTING MACHINE Filed March 3, 1932 2 Sheets-Sheet l Dec. 19, 1933. J ASHLEY 1,939,648

FASTENING-INSERTING MACHINE Filed March 3, 1932 2 Sheets-Sheet 2 Patented Dec. 19, 1933 1,939,648 FASTENING-INSERTI'NG MACHINE John W. Ashley, Beverly, Mass, assignor to: United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application March 3, 1932. Serial No. 596,548

' 41 Claims.

This invention relates to machines for inserting fastenings, as those adapted for nailing heels to shoes. In such work, the relation to one another of the nails of a set which is to fasten a heel changes with the size of said heel and of the shoe, the nailing design being such as to maintain the points of insertion relatively close to the periphery of the heel, thus giving secure attachment with a tight crease. This,

of course, necessitates a corresponding alteration in the location of the nail-passages in the jack, if inside nailing is being carried on, or those in the die-block of a machine for doing outside nailing. Moreover, if loading mechanism is to be employed, there must be means whereby the nails may be delivered conveniently into the nailpassages for the varying designs.

An object of my invention is to provide-for the arrangement of the. entire system of nail-receiving passages so they may be adapted for the insertion of theinails according to all the desired.

shown herein as tubes movable in a jack, though 7 they might instead be in the loading device,

the jack-tubes being set manually, are thus automatically positioned. To determine the extent of this movement, I provide means arranged to be set by the operator, this consisting of some such movement-limiting means as a stop-screw. No other efiort on the part of the operator is necessary to obtain the chosen nailing design. The movement of the nail-receiving members may be either from a chosen fastening-inserting position to a fastening-receiving position, the latter being common to all the designs, or from a common fastening-receiving position to achosen inserting position. In each case, the setting occurs during the co-operation of the nail-transferring means or loader with the work-contacting element or jack. In the first instance, the loader is shown herein as moving the tubes against the force ofa spring from a variable nailing position from each other to correspond to the largest nailing design, at which points the nails are receivedby said tubes, and in the second the tubes are normally latched against the tension of a spring in accordance with the smallest design and are released after the delivery of the nails to them, to be forced by the spring to the chosen nafling relation. This release may be automatically effected by a lever actuated by the loading device. Contacting with the tubes in both embodiments of the invention is an actuating member, preferably in the form of aicam-plate. In the first arrangement, this plate is directly energized by the spring, while in the second the force of the spring is communicated to. the actuating member through a lever. One of the means by which movement of the tubes is obtained is' shown as through connection 'to the reciprocat-ory means by which the nail-drivers in the tubes are operated. This particularly appears in connection with the second arrangement in which'the movement received from the reciprocating means .is opposed by the spring which has. already been referred to as being tensioned for separating the tubes.

In the accompanying drawings, a

Fig. 1 shows, partly in side elevation and partly in vertical section, the jack of aheel-attaching machine witha portion of an: associated nail loader, these being arranged according to one form of my "invention, there alsoappearing a fragment of the co-operating pressure-abutment;

Figs. 2 and 3 areplan views of the jack-top, with the nail-tubes respectively in their expanded; nail-receiving and in their contracted, nailedinserting relations; 1

Figs. 4, 5 and 6 are sectional details taken, respectively, on the lines I.VIV, V--V and VI''VI of Fig.1;

Fig, 7. illustrates, similarly to-Fig. 1, another form of the invention;" 1 V Fig. 3 is a front elevation of the-jack of Fig."7 with parts broken away;

Figs. 9 and 10 are plans of the top of the jacket Fig. '7, respectively, inthe contracted, nail-receiving and in the expanded, nail-inserting positions;

7 Fig. 11 is a sectional detail onthe line XIXI of Fig. '7;

Figs. 12and 13 show in longitudinal vertical section successive positions of the tube-controlling elements of the jack of Fig. 7; and

Fig. 14 is a detail in broken side elevation of the releasing lever with the parts as positioned during its idle moment.

Referring to Figs. 1 to 6,. inclusive, I have a jack-body 10 adapted to be secured in a vertical position upon the frame of a machine for attaching heels by inside nailing. The general structure of the machine may be as in Letters Patent of the United States No. 1,545,575, Standish, July 14, 1925. Mounted for reciprocation in the jackbody under the power of the machine is a plunger 12 carrying at its upper extremity a plate 14, in slots 16 in which drivers 18 are arranged to move. The rear driver 20 may be fixed against such movement. The slots are so inclined both laterally and from front to rear of the jack, that the drivers 18 may be shifted relatively to each other and to the driver 20, so they may be located to correspond to all desired nailing designs. The drivers move within nail-tubes, of which that designated as 22 and receiving the driver 20 may be secured against movement in the top plate 24 of the jack, while the tubes 26 of the drivers 18 are guided in slots 28 in said plate, which slots respectively coincide in their angular positions with the corresponding slots 16 in the driverplate. The tubes have at their upper extremities heads or enlargements 30, which receive the contact of the insole'of a shoe being operated upon and support it, the heel to be attached being maintained upon the heel-seat of the shoe by an upper pressure-abutment 32.

To adjust the tubes 26 to positions suitable for the particular size and style of heel being operated upon, they pass through slots 34 in an actuating cam-plate 36, guided to move horizontally in ways upon the under side of the plate 24. The slots 34 lie at such angles that they intersect the vertical planes ofthe slots 16 and 28,; and, as a result of this, if the plate 36 is moved in its ways, the tubes are thereby cammed along the slots 28 and 16. Normally, they are held in the slotted plates in positions corresponding to a particular nailing design, under the influence of a spring 40 acting upon the cam-plate, by a screw 42 threaded into a lug 44 depending from the plate 36 and having a head 46. This head, by the contact of its inner face with the outer wall of the jack, determines the extent of movement of the camplate and therefore of the tubes 26. The spring 40 may be of the torsion type, encircling a spindle 48 fixed in a'horizontal opening in the frame and having an upwardly extending loop 50 for engagement with the lug 44., The spindle is shown as secured by a screw 52 threaded through the jack, and which permits said spindle to be turned and the tension of the spring thus varied.

Travelingfrom a receiving position beneath a foot-plate 58, in openings in which terminate the tubes of a nail-distributor, to a deliveryposition above the jack is a loader-block 62 mounted upon a loader-slide 64. The arrangement and manner of operation of both the loading or transferring means and distributor may be as is disclosed in Letters Patent of the United States No. 1,785,928, Benjamin, Dec. 23, 1930, the loaderblock being carried between its'extremes of move ment under the power of the machine. In the block are vertical nail-passages 66, equal in number to those in thejack, and in the present instance preferably arranged'in accordance with return beneath the foot-plate 58 by engagement with a fixed member (not shown). Secured to the slide 64 at one side of the loader-block is a depending portion 74 provided with spaced projections '76, which enter the rear of the jack at each side of the usual back-stop '78 and contact with the cam-plate 36 to move this and consequently the tubes 26. The latter are thereby carried to their outward or expanded positions, reaching these points when the loader is at its forward extreme of movement. At this time, the loader-passages 66 and the passages in the tubes 22 and 26 are in registration.

In the use of my improved machine when organized as just described, the loader-block 62 initially contains a load of nails N in its passages 66, these being supported heads down upon the shutter 68 as they are delivered by the distributor through the tubes 60. The jack-tubes 26 are forced toward each other by the action of the cam-plate 36, urged rearwardly by the spring 40, said tubes being arrested by the engagement of the head 46 of the adjusting-screw at points coinciding with the particular nailing design which is most suitable for the heels and shoes to be operated upon. The operator causes the loader-slide 64 to advance, preferably under the power of the machine as in the previously mentioned Benjamin patent. When the forward end of the loading device arrives at the jack, its projections 76 strike the cam-plate and move this to its extreme position, at which the tubes 26 are expanded to what may be the largest nailing design (Fig. 2). The passages 66 in the loaderblock are similarly arranged, and, as the block and tube-passages are vertically alined at the end of the loader-travel, the latch '12 is tripped, releasing the shutter 68, which is moved by its spring '70 to free the loader-passages. The nails thereupon fall heads down into the tubes 22 and 26 of the jack. The movement of the loading device is then reversed and it is returned to normal, the shutter being there reset for the support of the succeeding load of nails falling through the tubes 60. As the loader retreats, freeing the cam-plate, the spring 40 returns this to the initial position, as determined by the head 46 of the adjusting-screw 42, so the tubes, now containing the nails resting upon the upper extremities of the drivers 18 and 20, are ready for insertion in the work at the chosen points (Fig. 3). The operator may now place a shoe upon the jack, with its insole resting upon the tube-heads 30 and. located by the back-stop '78, and to the heel-seat of this shoe he applies the heel to be attached. Upon the treadling of the machine, the abutment 32 descends to apply pressure to the work, and the drivers are reciprocated to force the nails N through the heel-seat of the shoe and into the heel to secure it in place. Upon removal of the heeled shoe from the jack, the machine is ready for the succeeding operation.

Another form which the invention may assume appears in Figs. '7 to 14, inclusive. Here, movement of the nail-driving mechanism is utilized instead of that of the loading device to move the tube-setting cam-plate against the force of its actuating spring, and the tubes normally occupy their nail-receiving positions rather than those corresponding to the chosen nailing design. Generally, the jack, driving mechanism and loading mechanism are organized as before, the camplate 36 co-operating with the tubes 22 and 26 in the same manner. Instead of the threaded lug 44, the cam-platehas at its under side a pair tubes 26 most closely together.

of spaced lugs 90, 90.. Between the lugs extends a horizontal pin 92carried by a compound operating lever- L, which has a primary poweractuated portion 94 and a secondary driven portion 96, in which the pin 92 is fixed. The two lever-portions are fulcrumed side by side at 98 upon the jack-body 10. They are connected for movement together in one direction by a pawl 100 pivoted at 102 upon .a short upwardlyextending arm of the lever-portion 94, this pawl being arranged to engage a depression in a segment 104 of the lever-portion 96 and to impart thereto a clockwise movement, as the elements are viewed in Figs. '7, 12 and 13 of the drawings. Normal contact of the engagingr'end of the pawl with the upper edge of the segment is maintained by an expansion-spring 106. A tail 108 from the lever-portion 96 is urged against the end ofan adjusting-screw 110 threaded vertically through a lug upon the jack, this movement being under the influence of a torsion-spring 112 surrounding the fulcrum-spindle of the lever L and having its ends engaging the jack-body and a pin 114 projecting from one side of the lever-portion 96. The position of the screw 110 determines the extent of anti-clockwise movement of the leverportion 96 by the spring 112, and, therefore, the extent to which the cam-plate 36 separates the tubes 26 to arrange them in diiferent nailing designs. A clockwise movement of the entire lever L, with its sections joined by the, pawl 100, is produced by connection to the driver-plate 14, this being through tension-springs-116, which allow the downward travel of the driver-plate to exceed the extent of movement of therear extremity of the lever-arm. This movement of the lever-portion 96 through the companion portion 94 and the pawl 100 carries the cam-plate to its extreme rearward position, in which it brings the This is as appears in Fig. 9.

To trip the pawl 100 and so unlatch the leverportion 96 that it may be released from the portion94' and turned anti-clockwise by the spring 112 until the tail 108 strikes the screw 110, there is provided a releasing lever l fulcrumed at 120 upon the front of the jack. This lever Z has a horizontal arm 118 resting upon a forwardly extending tail of the pawl, there being yieldable upon this main portion of the lever a substantially vertical arm 122, which rises to a point slightly above the heads 30 of the nail-tubes. The arm 122 isshown as having a lower portion projecting back horizontally at 124, from which horizontal portion depends a pin 126 fixed therein. In the'arm 118 is an opening, best shownin Fig. 14, through which thepin extends and about which opening in the under face of, the arm is a depression, in which lies ahead 123 upon the pin, this head being too large topass through the opening. An expansion-spring 130 surrounds the pin, holding the arm 118 and arm: portion 124 normally separated tothe maximum extent, the head 128 being forced against the upper wall of the depression. Extending for wardly from the loader-slide 64 is an actuating projection 132 for the releasing lever, this projection having at its under side a downwardly and'rearwardiy inclined face 134,- and a depression, at the front of which is a generally vertical face 136. When the loading device moves forward to deposit the nails-N which'it carries, the inclined surface 134 rides over the end of the lever-arm 122, depressing this against the force of the spring 130, the pin-head 128 moving in thedepression in the arm 118 without contacting with the tail of the pawl 100. In its forward travel, the surface 136 slightly passes the leverarm;122, so the upper extremity of this is within the depression in the actuating projection (Fig. 7). When the empty loader leaves the jack to return beneath the foot-plate, the surface 136 engages the arm 122 and tiltsthis clockwise, as appears in Fig. 12, the parts of the lever Z turning substantially as a unit, the spring 130 not being compressed. This forces the arm 118 against the tail of the pawl, to free the secondary portion 96 of the lever L from the primary portion a 94., permitting the former to be swung back by the spring 112 until arrested by the stop-screw 110 (Fig. 12). Since the lever-arm 122. extends into the space which the jacked shoe will occupy after clamping pressure has been applied, said arm will be forced down thereby, the effect being similar to that produced by the projectionsurface 134, the spring 130 being compressed and the pawl 100 unaffected.

In considering the action of the last-described embodiment of the invention, it may be assumed that the operation of the nail-loading and naildriving mechanisms and the manipulation of the work by the operator areas in the preceding form. Normally, the elements of the jack are related asappears in Fig. 7. Here, however, the loader-block 62 has been advanced and delivered its load of nails into the jack-tubes, and is upon the point of returning beneath the foot-plate 58. In making this delivery, the loading mecnamsm found the tubes in their contracted relation or corresponding in arrangement to the minimum nailing design (Fig. 9), this being the same as that of the loader-blook-passages 66. In this position, the tubes are held by the cam-plate 36 actuated through both portions of the lever L moved together by the depressed driver-plate 14.

' In the return of the loader to normal, the projection-suriace 136 strikes the releasing leverarin 122, the lever Z swings clockwise, and, by contact with the pawl 100, frees the secondary lever-section 96 from the primary section 94 (Fig. 12). The-spring 112 thereupon moves the section 96 anti-clockwise until it is stopped by the screw 110, which will have been adjusted by the operatorto cause the jack-tubes to be positioned according to the chosen nailing design when they are moved from each other by the cam-plate(Fig. 10). Now the operator starts the nail-inserting action, and the drivers rise to force the nails through the heel-seat of the jacked shoe into the associated heel. ward movement of the drivenplate 14, a post 140, which rises from it, engages the end of the lever 94, causing the pawllOU to make an idle forward stroke over the segment 104 through a substantially constant distance. of sumcient extent to carry the point of the pawl past the depression in the segment for an adjustment of the screw 110 which corresponds to the largest nailing design. When the drivers return to their initial positions and the springs 116 swing the lever-portion 94 downward; the pawl'travels over the segment and enters the depression, (Fig. 13), movin'g the lever-portion In this up- This movement is 96 through a distance dependhig upon the ad- This restores the 1 of'the loader or the jacking and. application of ii;

pressure to a shoe, is avoided by movement of said arm, compressing the spring 130 without affecting the pawl-engaging arm 118 (Fig. 14).

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

1. In a fastening-inserting machine, the cornbination with a device for receiving contact of the work, of a fastening-delivering device movable into co-operation with the contact device, said devices having fastening-receiving passages, the passages of one of the devices being in members movable thereon to different positions, and means made effective upon movement of the other of said devices for setting the members.

2. In a fastening-inserting machine, the combination with a device for receiving contact of the work, of a fastening-delivering device movable into co-operation with the contact device, said devices having fastening-receiving passages, the passages of one of the devices being in mem bers movable thereon to different positions, and automatic means made effective during the cooperation of the devices for moving the members.

3. In a fastening-inserting machine,the combination with a device for receiving contact of the work, of a fastening-delivering device movable into co-operation with the contact device, said devices having fastening-receiving passages, the passages of one of the devices being in members movable thereon to diiferent positions, automatic means made efiective during the co-operation of the devices for moving the members, and means arranged to be set by the operator to determine the extent of the movement.

4. In a fastening-inserting machine, the com bination with a device for receiving contact of the work, of a fastening-delivering device movable into co-operation with the contact device, said devices having fastening-receiving passages, the passages of one of the devices being in members movable thereon between a fasteningreceiving position and different fastening-inserting positions, and means made eifective upon movement of the other of said devices for setting the members in fastening-receiving position.

5. In a fastening-inserting machine, the combination with a device for receiving contact of the work, of a fastening-delivering device movable into co-operation with the contact device, said devices having fastening-receiving passages, the passages of one of the devices being in members movable thereon between a fasteningreceiving position and difierent fastening-inserting positions, and means made effective upon movement of the other of .said devices for setting the members in a chosen fastening-inserting position.

l 6. In a fastening-inserting machine, the combination with a device for receiving contact of the work, said device having movable members provided with fastening-receiving passages, of a device movable to deliver fastenings to the passages, and means controlled upon movement of the delivering device for moving the members.

7. In a fastening-inserting machine, the combination with a device for receiving contact of the work, said device having members movable between fastening-receiving position and dinerent fastening-inserting positions and provided with fastening-receiving passages, of a device movable to deliver fastenings to the passages, and means controlled upon movement of the delivering device for moving the members to fastening-receiving position.

8. In a fastening-inserting machine, the combination with a device for receiving contact of the work, said device having members movable between fastening-receiving position and different fastenin -inserting positions and provided with fastening-receiving passages, of a device movable to deliver fastenings to the passages, and means controlled upon movement of the delivering device for moving the members to the chosen fastening-inserting position.

9. In a fastening-inserting machine, the combination with a work-support, of a transferring device movable to deliver fastenings to the worksupport, the work-support and transferring device each having a set of fastening-receiving passages, one of the sets being formed in movable members, and automatic means for moving the members.

10. In a fastening-inserting machine, the combination with a work-support, of a transferring device movable to deliver fastenings to the work-support, the work-support and transferring device each having a set of fastening-receiving passages, one of the sets being formed in movable members, automatic means for moving the members, and means arranged to be set by the operator to control the extent of movement of the members.

11. In a heel-attaching machine, the combination with a jack, of a loader movable to deliver nails to the jack, such co-operating jack and loader having nail-receiving passages, the passages of one of these co-operating devices being formed in tubes movable to different positions, and means controlled upon movement of the other device for moving the tubes.

12. In a heel-attaching machine, the combination with a jack, of a loader movable to deliver nails to the jack, such co-operating jack and loader having nail-receiving passages, the passages of one of these co-operating devices being formed in tubes movable to different positions, means for normally maintaining the tubes in positions corresponding to a particular nailing design, and means acting during the co-operation of the loader with the jack for setting the tubes in accordance with a difierent nailing design.

13. In a heel-attaching machine, the combination with a jack, of a loader movable to deliver nails to the jack, such co-operating jack and loader having nail-receiving passages, the pa."- sages of one of these co-operating devices being formed in tubes movable to different positions, means for normally maintaining the tubes in posh tions corresponding to a particular nailing design, means acting during the cooperation of the loader with the jack for setting the tubes in accordance with a different nailing design, and means arranged to vary the extent of movement of the set tubes.

14. In a heel-attaching machine, the combination with a jack, of a loader movable to deliver nails to the jack, such co-operating jack and loader having nail-receiving passages, the passages of one of these co-operating devices being formed in tubes movable to different positions,

means for normally maintaining the tubes in positions corresponding to a particular nailing design, and means acting during the co-operation of the loader with the jack for moving the tubes toward each other to correspond to a smaller nailing design.

15. In a heel-attaching machine, the combination with a jack, of a loader movable to'deliver nails to the pack, such co-operating "jack andloaderhaving nail-receiving passages, the passages of one of these co-operating devices being formed in tubes movable'to different positions, means for normally maintaining the tubes in positions corresponding to the smallest nailing derespond to a larger nailing design.

16. In a heel-attachingmachine, the combination with a jack having movable nail-tubes, of a loader movable to deliver nails to the jack-tubes, and means controlled upon movement of the loader for moving the jack tubes;

17. In a heel-attaching machine, the combination with a jack having movable nail-tubes, of a loader movable to deliver nails to the jack-tubes, means controlled upon movement of the loader for moving the jack-tubes,.and means arranged to vary the extent of movement of the tubes.

18. In a heel-attaching machine, a jack, nail-' tubes mounted for movement therein, automatic means for simultaneously moving plural tubes, and means common to such tubes and arranged to vary the extent of the movement effected automatically.

19. In a heel-attaching machine, a jack, nailtubes mounted for movement therein, an actuating member common to plural tubes, a spring for moving the actuating member, and an adjustable contact member arranged to vary the movement of the actuating member.

20. In a heel-attachingmachine, a jack, nailtubes mounted for movement therein, an actuating member common to plural tubes, and a loader traveling between nail-receiving and nail-delivering positions and arranged for contact with the actuating member to move it.

21. In a heel-attaching machine, a jack, nailtubes mounted for movement therein, an actuating member common to plural tubes, a loader traveling between nail-receiving and nail-delivering positions and arranged for contact with the actuating member to move it, and a spring arranged to move the actuating member in the opposite direction.

22. In a heel-attaching machine, a jack, nailtubes mounted for movement therein, an actuating member common tov plural tubes, a loader traveling between nail-receiving and nail-delivering positions and arranged for contact with the actuating member to move it, a spring arranged to move the actuating member in the opposite direction, and a screw limiting the movement of the actuating member under the influence of the spring.

23. In a heel-attaching machine, a jack, nailtubes mounted for movement therein, a camplate acting upon a plurality of the tubes, and a nail-loader traveling in contact with the camplate.

24. In a heel-attaching machine, a jack, nailtubes mounted for movement therein, a cam-plate acting upon a plurality of the tubes, a nail-loader traveling in contact with the cam-plate, and a spring opposing movement of the cam-plate under the influence of the loader.

25. In a heel-attaching machine, a jack, nailtubes mounted for movement therein, a cam-plate acting upon a plurality of the tubes, a nail-loader traveling in contact with the cam-plate, a spring opposing movement of the cam-plate under the influence of the loader, and a screw threaded into the'cam-plate. and movable thereby intocontact with the jack. 5 I

27. In a heel-attaching machine, a jack, nailtubes movable laterally therein, drivers operating in the tubes, means for reciprocating the drivers,

and connections communicating the movement of the reciprocating means to the nail-tubes to produce their lateral movement.

28. In a heel-attaching machine, a jack, nailtubes movable therein, a loader movable to deliver nails to the tubes, drivers operating-in the tubes, means for reciprocating the drivers, and connections to the loader and to the reciprocating means for moving the nail-tubes.

29. In a heel-attaching machine, a jack, nailtubes' movable therein, drivers operating in the tubes, means for reciprocating the drivers, connections to the reciprocating meansfor moving the naihtubea means for opposing such movement, and a latch for retaining the tubes as set by the reciprocating means.

30. In a heel-attaching machine, a jack, nailtubes movable therein, a loader movable to deliver nails to the tubes, drivers operating'in the tubes, meansfor reciprocating the drivers, connections to the reciprocating means for moving the nailtubes to nail-receiving position, a spring opposing such movement, a latch for retaining the tubes against the force of the spring, and means movable with the loader for releasing the latch.

31. In a heel-attaching machinea jack, nailtubes movable therein, aloader movable to deliver nails to the tubes, drivers operating in the tubes, means for reciprocating the drivers, connections to the reciprocating means for-moving the nailtubes to nail-receiving position, a spring opposing such movement, a latch for. retaining the tubes against the force of the spring, means movable with the loader for releasing the latch, and means for variably limiting the movement of the connections upon release of the latch.

32. In a heel-attaching machine, a jack, nailtubes movable therein, an actuating member for the tubes, a primary operating member for the actuating member, means for moving the primary member, and a secondary operating member movable by the primary member and arranged to move the actuating member.

33. In a heel-attaching machine, a jack, nailtubes movable therein, an actuating member for the tubes, aprimary operating member for the J actuating member, means for moving the primary member, a secondary operating member movable by the primary member and arranged to move the actuating member, and a latch for retaining the secondary member in the position to which it is set by the primary member.

34. In a heel-attaching machine, a jack, nailtubes movable therein, an actuating member for the tubes, a primary operating member for the actuating member, means for moving the primary tubes, means for reciprocating the drivers, a. primary lever movable by the reciprocating means, a secondary lever movable by the primary lever and engaging the actuating member, a spring arranged to move the secondary member oppositely to its movement by the primary lever, and a latch for the secondary lever.

36. In a heel-attaching machine, a jack,- nailtubes movable therein, a loader movable to deliver nails to the tubes, an actuating member contacting with the tubes, means for reciprocating the drivers, a primary lever movable by the reciprocating means, a secondary lever movable by the primary lever and engaging the actuating member, a spring arranged to move the secondary member oppositely to its movement by the primary lever, a latch for the secondary lever, and means movable by the loader for disengaging the latch from the secondary lever.

37. In a heel-attaching machine, a jack, nailtubes movable therein, a loader movable to deliver nails to the tubes, an actuating member contacting'with the tubes, means for reciprocating the drivers, a primary lever movable by the reciprocating means, a secondary lever movable by the primary lever and engaging the actuating member, a spring arranged to move the secondary member oppositely to its movement by the primary lever, a latch for the secondary lever, means movable by the loader for disengaging the latch from the secondary lever, and a screw with which the secondary lever contacts when released by the latch.

38. In a heel-attaching machine, a jack, nail- -tubes movable therein, a cam-plate acting upon the tubes, a primary lever, means for moving the rimary lever through a substantially constant distance, a secondary lever acting upon the camplate and movable by the primary lever through varying distances, and means for determining the distance to which the secondary lever is moved. I

39. In a heel-attaching machine, a jack, nailtubes movable therein, a cam-plate acting upon the tubes, a primary lever, a pawl carried by the primary lever, means for moving the primary lever under the power of the machine, a secondary lever acting upon the cam-plate, said secondary lever being provided witha depression for engagement by the pawl, a spring arrangedto move the secondary lever in a direction opposite to the movement received from the primary lever, and an adjustable stop for the secondary lever.

41). In a heel-attaching machine, a jack, nailtubes movable therein, an actuating member for the tubes, a spring for moving the member, a re.- taining member resisting the movement of theactuating member under the influence of the spring, and a releasing member engaging the retaining member and having portions capable of movement independently of each other.

41. In a heel-attaching machine, a jack, nailtubes movable therein, an actuating member for the tubes, a spring for moving the member, a retaining member resisting the movement of the actuating member under the influence of the spring, and a releasing member engaging the retaining member and having portions capable of movement independently of each other, one of which portions projects beyond the work-engaging surface of the jack.

JOHN W. ASHLEY.

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