US1979409A - Fastening-inserting machine - Google Patents

Description

Nov. 6, 1934. 1 w PRATT ET AL 1,979,409l

. FASTENING INSERTING MACHINE Filed March 22, 1933 2 Sheets-Sheet l igL WVM/70H5 Nov. 6, 1934- J. W.IPRATT Er AL FASTENING INSERTING MACHINE Filed March 22. 1953 igQ.

2 Sheets-Sheet 2 Patented Nov. 6, 1934 UNITED STATES 1,979,409 FAsTENING-INSERTING MACHINE .lohn William Pratt and Harold Lane, Leicester,` England, assignors to United Shoe Machinery Corporation, Paterson, N. J., a. corporation of New Jersey Application March 22, 1933, Serial No. 662,078

` In Great Britain April 1,8, 1932 19 Claims.

This invention relates to fastening-inserting machines, and is herein illustrated as applied to a machine organization of the same general character as disclosedin United States Letters I Patent No. 1,815,295, granted on July 2l, 1931 upon an application of George Goddu, such a machine having a driver for driving staples to fasten uppers to: soles or insoles (hereinafter frequently referred to generically as soles) in the lasting oi shoes and a deflector arranged to engage the legs of each staple prior to and during their entrance into a shoe to curve them progressively as they are driven and thereby anchor them in the sole. It is to be understood,

l5 however, that the invention is not limited to i machines of the illustrated type nor, in some aspects, to machines that drive staples as distinguished from iastenings of other kinds.

it is the present practice of some shoe manufacturers to use insoles that are composed, at least in part, of so-called leatherboard o1' fibreboard, which is a materialmuch more resistant to penetration by iine Wire staples than is the leather of Which insoles are usually made. It is an object of the present invention to provide improvements in machines of the above-mentioned character to adapt them better for use on Work in which there is such increased resistance to penetration by the iastenings. More particularly, in one aspect, the invention aims to provide improved fmeans for guiding the staples as they are being driven, and thus to afford better insurance against crumpling of the staples or deflection of their legs in the Wrong directions. Machines of the illustrated. type include in their organization a device which is movable to transfer each staple from a position in which it is formed into position to be driven and which serves, in part, to guide the legs of the staple in the driving operation. For purposes of this invention the portions of the transferring device that guide the staple legs are arranged to extend substantially as far in the direction of the drive as the deilecting face of the deflector, so that straight, unbroken guiding faces are provided for the legs substantially as far as the pointsvvhere they begin to be deflected by the deiiector. Further to assist in accomplishing the objects in view the construction disclosed is such that the legs of the staples are guided on their cuter sides in the driving operation by guiding walls that are integral parts of a single member and extend substantially as iar as the dslecting face ci the deflector; and both the legs and the crossbar of the staple, on the opposite side thereof from the transferring device, are guided by a member having a plane guiding face extending widthvvise throughout the length oi the crossbar and extending lengthwise into such close relation to the defiector as only to afford 6c space enough for the crossbar of the staple to pass, this member being mounted for adjustment toward or from the deflecting face of the deector. By the provision of such means for guiding and controlling the staple practical in- @a surance is afforded that the staple Will be driven into the Worl; in the desired manner without distortion, even though the Work be unusually resistant to penetration by the staple legs.

In machines of the illustrated type, as heretofore constructed, the staple driver remains in the position that it occupies at the completion oi its driving movement with its end close to the deiiector as the driver and the deflector are withdrawn from the Work. To insure against any 5 accidental displacement of a driven staple in such movement of the driver and deflector away from the work, in case the ci'ossbar of the staple should be .trapped between the end of the driver and the deflector by reason of failure oi the lstaple to be driven as iar as usual into the Work,

the invention further provides means for retracting the driver from the deiiector before these parts are separated from the Work to any substantial extent. In machines of the illus- 85. trated type there is a common support for the driver and the defiector, which, receives a rectilinear movement toward the Work priory to the staple-driving operation and after the drive receives a short swinging movement to separate 90, the driver and deilector from the Work before it is retracted along its rectilinear path; and as herein illustrated such swinging movement of the support is availed oi to effect a short retractive movement of the driver away from the deflector for the purpose above described. More particularly, the construction shown comprises a stop which, in response to such swinging movement of the support, acts on a driveroperating lever on thel support to eiect the retractive movement of the driver. Thereafter, in the next succeeding cycle of the machine, the driver is fully retracted and released to drive a staple by means oi the same character as provided heretofore for that purpose.

'Ihe above and other features of the invention, including various novel details of construction and combinations oi parts, Will now be more particularly described by reference to the accompanying drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a View in left-hand side elevation of a portion of a machine in which the invention is embodied, with the parts shown in the positions that they occupy at the end of the staple-driving operation;

Fig. 2 shows on a larger scale certain portions of the structure shown in Fig. 1 as viewed in the direction of the arrow on that figure;

Fig. 3 is a section on the line III-II- of Fig. 2;

Fig. 4 is a perspective view on a still larger scale of the staple deector detached;

Fig. 5 is a diagrammatic perspective view illustrating more clearly the relation between certain parts of the structure; and

Fig. 6 is a view similar to Fig. 2, on a larger scale, of a portion of the structure therein shown, parts being omitted.

Since the invention, as above stated, is herein illustrated as applied to a machine organization of the same general character as disclosed in Letters Patent No. 1,815,295, only such portions of the machine as it is necessary particularly to refer to for an understanding of the invention are shown in the drawings and will be described in detail.

It will be understood that the shoe and last are supported bottom upward in the hands of the operator and presented successively in different positions in the progressive lasting of the shoe. In each lasting position the upper is pulled heightwise of the last and inwardly over the -sole by a gripper (not herein shown), and in time relation to each upper-pulling operation the marginal portion of the upper is laid over and upon the sole and is fastened by driving a staple in the manner hereinafter described. The machine is provided with means (also not shown) for feeding a comparatively :line wire to instrumentalities which sever a portion of it and form the severed portion into a substantially U-shaped staple, and with a staple-transferring device, hereinafter more particularly referred to, which operates to transfer each staple downwardly from the position in which it is formed into position to be acted upon by a staple driver.

The staple driver, shown at l in the drawings, is secured to a driver slide 3 (Fig. 1) which is movable in a guideway formed in a bracket 5, the slide being arranged to move in a direction inclined rearwardly and downwardly at an angle of about 30 to the horizontal. The driver slide 3 is operated by a lever 7 which is pivoted on a stud 9 on the forward end of a slide 1l arranged to move in a forwardly and downwardly inclined rectilinear path to lay the marginal portion of the upper inwardly over the sole, the slide 1l serving as a support for the driver and its operating slide 3 and also for the staple deiiector and other parts hereinafter described. The lower end of the driver-operating lever 7 is provided with a block 13 lying in a recess in the driver slide 3, and the lever is arranged to be swung about its pivot 9 by a bell-crank lever l5 which is mounted on a pivot pin 17 secured to the above-mentioned slide 11. A forwardly extending arm of the bell-crank lever 15 carries a roll 19 which lies in a cam slot 2l in the lever 7, this cam slot being so formed that staple-driving movement is imparted to the driver 1 by upward movement of the forwardly extending arm of the bell-crank lever and retractive movement is imparted thereto by downward movement of this arm. The upward movement of the arm to impart to the driver its staple-driving movement is effected by a torsion spring a portion of which is shown at 16. For imparting driver-retracting movement to the bell-crank lever 15 against the resistance of this spring there is pivoted at 23 on a fixed portion of the head of the machine a cam-operated lever 25 having pivoted thereon a latch member 27 arranged to engage a plate 28 projecting from the lower end of a downwardly extending arm of the bell-crank lever. When the slide 1l is moved forwardly and downwardly the latch member 27, which at that time engages the plate 28, causes the forward arm of the bellcrank lever 15 to swing downwardly against the resistance of the spring 16, thereby retracting the staple driver and loading the spring ready for a staple-driving operation. The latch member 27 is thereafter released from engagement with the plate 28, to permit the forward arm oi' the bell-crank lever to be swung upwardly by the spring 16 by a rearward rocking movement of the lever 25 which causes a screw 29 on the slide 11 to swing the latch member against the resistance of a spring 30 in a direction to disconnect it from the plate 28. As the staple driver is operated it drives a staple, previously fed into alinement therewith by downward movement of a substantially U-shaped transferring member 31, against a staple defiector 33 carried by the slide l1, the deiiector acting on the legs of the staple prior to and during their entrance into the shoe to curve them progressively they are driven and thereby anchor them in the sole, as illustrated at s in Fig. 1. As thus far described the parts herein shown are constructed and operated substantially as described in the previously-mentioned Letters Patent.

As further disclosed in the above-mentioned Letters Patent, the upper face of the stapleguiding passage along which the staple is driven by the staple driver is formed in part by the lower end face of the staple-transferring member 3l which serves to guide the legs of the staple, this member partially embracing a downwardly extending inside staple-forming member 34 carried by the slide 11 and cooperating with another member (not shown) to form the staple. Heretofore there has also been provided, as shown at 238 in said Letters Patent, an extension on the deilector 33 to serve as an upper guiding wall for the staple legs beyond the lower end of the transferring member. In the construction herein shown such an extension is omitted and the lower ends of the opposite side portions of the transferring member 31 are extended toward the deector 33 in directions parallel to the direction of movement of the staple driver, as indicated at 35 in Fig. 5, so that the lower end faces of the side portions of the transferring member which guide the staple legs extend substantially as far in the direction of the drive as the defiecting face of the deflector.

Unbroken guiding faces for the upper sides of the staple legs are thus provided substantially as far as the deecting face of the def'lector to insure against any upward buckling of the staple legs in driving the staple into work which opposes unusual resistance to the passage of the legs. While the delector, as heretofore, is pivoted for adjustment relatively to the stapleguiding means to vary the curvature imparted to the staple legs, the adjustment of the deflector for this purpose is of small estent and does not, under any conditions, result in space enough between the delecting face and the extended side portions 35 of the `transferring member to aiord any danger of upward buckling or the staple legs. A further advantage of the construction thus provided is that adjustment o the deiiector does not affect in any way the angular relation `between any portion o the guiding means above the staple and the direction of the 'movement of the driver in driving the staple.

The dei-lector is provided in its deiiecting face, as in the construction shown in the previously mentioned Letters Patent, with two guiding grooves or notches` 37 which serve to maintain at the correct distance apart the portions of the staple legs actually in engagement with the deector. As a consequence of the provision of these grooves 37 there is butlittle tendency for side thrust of the legs of the staple in the stapledriving operation. 1n order better to resist any tendency that there may be for outward side thrust of the staple legs, the construction herein shown provides, for guiding the staple legs at their outer sides, guiding walls 39 which are integral parts of a solid metal block 41 .instead of separate members fastened together as in the earlier construction. It is accordingly impossible for the guiding walls at the outer sides of staple legs to be sprung apart, whatever may be the resistance to the penetration of the legs into the work. The block 41 is so formed that its guiding walls 39 extend substantially into contact with the deflecting face oi the deflector. It has been found that with the machine constructed as described there is no substantial tendency, in any event, for the staple legs to be distorted inwardly toward each other,

accordingly the yieldable member heretofore provided to extend between the legs to assist in guiding them has been dispensed with.

The staple driver 1, as in the construction disclosed in the previously mentioned Letters Patent, is T-shaped in cross section to provide a strengthening rib 43. As herein shown, however, the arrangement is such that this rib is located on the upper side of the driver instead oi on the lower side and is guided in a groove formed in the above-mentioned solid metal block d1. The staple-transferring member 31 is provided with a recess to permit this rib to move between the opposite side portions of the mem ber, and the inside former 34, which is partially surrounded by the member 31, is shortened at its lower end by an amount corresponding to the height of the rib. The disposition of this rib on the upper side oi the driver permits the driver to be retained in position in its guideway in the block 41 by a dovetailed plate 45, This plate is held in position at one side by anundercut portion 4'? (Fig. 3) of the block 41 and at the other side by a plate 49 clamped to the block 41 by a screw 51 and having a tongue 50 which lits within a groove in the block. The plate 45 may accordingly be adjusted along the block 41 to such a position that its lower `end is located as close as possible to the deflecting face oi the derlector 33 while still providing a space between it and the delector of sufcient width to permit the crossbar oi the staple to as the driving of the staple is completed. It will be evident that the plate 45 by its plane upper face serves to support both the legs and the crossbar of the staple throughout the length of the latter `against downward displacement until the latest possible stage in the staple-driving operation, and since, as previously stated, the walls 39 at the outer sides or the staple legs and the portions of the member 31 above the legs extend substantially as far as the delecting face of the deflector, the legs of the staple are also guided in a most eiective manner against outward and upward displacement,

The plate 45, as shown in Fig. 2, is wider than the distance between the outer sides of the grooves 37 in the deflector, and it is beveled underneath at its lower end, as shown at 52. (Fig. 2), to present anormally straight end face parallel to the deflecting face of the derlector and to the crossbar of the staple. if one of the two grooves 3'? in the cleiiector becomes worn deeper than the other groove, the portion of the end face of the plate 45 which lies opposite the other groove may be honed away somewhat until the distance between the bottoms of the two grooves and the portions of the end of the plate that are opposite them are equal, so as to avoid any undesirable inequality in the curvatures imparted to the two legs of the staple. After such treatment the plate 45 will be adjusted, if necessary, to position its end face at the proper distance from the deflecting race of the deflector and will be clamped in adjusted position by the plate 49 and the screw 51.

`As in the machine disclosed in the previously-mentioned Letters Patent, the staple-inserting and deilecting parts are separated from the workafter each staple-driving operation by upward swinging movement oi the slide 11 about the axis of a rook shaft 54 before the slide receives its retractive movement in a rearward direction. In order to -avoid any danger of undesirable displacement of a driven staple at this time, in case the crossbar of the staple should become trapped between the end of the driver and the deflecting face of the deflector by reason of unusual resistance of the work to the driving of the staple, the construction herein shown is such that the driver is retracted somewhat from the deilector as the parts are lifted from the work. To this end, the fibre disk shown at 184 in the previously mentioned Letters Patent for limiting the movement of the staple-driving means is omitted, and on the upper face of the forwardly extending arm of the bell-crank lever '15 there is provided a boss 55 arranged to cooperate with a stop 57 to limit the driver-operating movement of the lever. The stop 57 consists of a fibre disk fastened to a holder 58 which is supported in a manner hereinafter described on a bracket 59 fixed to the frame of the machine above the bel`crank lever 15, this bracket in machines of the illustrated type serving as a support for a forwardly and rearwardly extending shaft 60 whereby overdraw movement is imparted to the gripper to pull the upper inwardly over the shoe bottom. It will be understood that the boss 55 engages the stop 57 to limit each staple-driving movement of the bell-crank lever l5 and thus to limit the movement or the end of the driver toward the deflector. When in the normal operation or" the machine, after the has thus been driven, the slide 11 is swung upwardly to lift the deeotor and the driver somewhat away from the work prior to the rearward movement of the slide along its rectilinear path preparatory to another series of operations on the shoe, the stop 57 by its contact with the boss 55 prevents the forwardly extending arm of the bell-crank lever 15 from being carried bodily upward by the slide. The driver-operating lever '7, however, which is pivot-ed at 9 on the slide 11, is moved bodily upward by the slide, so that the cam slot 21 in this lever moves relatively to the roll 19 on the lever 15. rThis causes a swinging movement of the lever 'Z in a counterclockwise direction, as the parts are viewed in Fig. 1, whereby the staple driver is retracted somewhat along its guideway away from the deector. Even, therefore, if the crossbar of a staple should be trapped between the end of the driver and the deflector, the cross-bar will e released by the retractive movement of the driver before the driver and the deflector have received a movement of any substantial extent away from the shoe bottom. rlhe crossbar of such a staple may thereafter be tapped down by a hand hammer if necessary.

The lower face of the stop 57, with which the boss 55 contacts above described, slopes forwardly and downwardly in substantially parallel relation to the directions of forward and rearward movement of the slide ll, so that as the slide is retracted rearwardly after the staple-driving operation the boss 55 will slide along the lower face of the stop without causing any further retractive movement of the staple driver, the stop 5'? being of length that the boss 55 remains in contact with it at the end of the comparatively short rearward movement of the slide. It will be understood that thereafter, in the next forward movement of the slide 11, the driver is fully retracted in the usual manner by the action of the latch member 27 on the plate 28 of the bell-crank lever l5. The holder 58 is bifurcated to provide side members 61 which embrace a portion of the bracket 59, the members 6l having horizontal tongue and groove connections 63 with the bracket to permit the holder 58 and stop 57 to be adjusted forwardly and rearwardly. Such adjustment serves to vary the limit of stapledriving movement of the bell-crank lever 15, so that the distance between the end of the staple driver and the staple deflector at the end of the staple-driving movement of the driver may be accurately determined. One member 6l is provided with a slot S5 through which extends a clamping screw 6'? threaded in the bracket 59 for securing the holder 53 in adjusted position.

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

l. In a fastening-inserting machine, the combinaton with a staple driver, and a dei'iector for engaging the legs of each staple prior to and during their entrance into the work to curve them progressively as they are driven and thereby anchor them in the work, of a device movable to transfer a staple into position to be driven, device having portions thereof arranged to extend substantially as far in the direction of the drive as the derecting face of the deflector to guide the legs of the staple in the staple-driving operation.

2. In a fastening-inserting machine, the combination with a staple driver, and a deflector for engaging the legs of each staple prior to and during their entrance into the work to curve them progressively as they are driven and thereby anchor them in the work, of a substantially U-shaped member movable to transfer a staple into position to be driven, the opposite side portions of said member having faces arranged to extend substantially as far in the direction of the drive as the deiiecting face of the deflector when the member is at the end of its transferring movement to guide the legs of the staple in the staple-driving operation.

3. In a fastening-inserting machine, the combination with a staple driver, and a deiiector for engaging the legs of each staple prior to and during their entrance into the work to curve them progressively as they are driven and thereby anchor them in the work, of a member having I portions integral with each other formed to provide guiding walls for the outer sides of the legs of the staple substantially as far in the direction of the drive as the deecting face of the deflector, and a device movable to transfer the staple into position to be driven, said device having portions also arranged to extend substantially as far as the deflecting face of the dei-lector to assist in guiding the staple legs in the staple-driving operation.

4. In a fastening-inserting machine, the combination with a staple driver, and a deector for engaging the legs of each staple prior to and during their entrance into the Work to curve them progressively as they are driven and thereby anchor them in the work, of a device movable to transfer a staple into position to be i,

driven, said device being arranged to serve thereafter as a guide for the staple substantially as far as the deflecting face of the dei-lector in the staple-driving operation, means provided with a plane face for guiding the staple legs j` and also the crossbar throughout the length of the latter on the opposite side of the staple from said transferring device as the staple is driven, and means having walls extending substantially as far in the direction of the drive as the deiiecting face of the deector for guiding the staple legs at their outer sides.

5. In a fastening-inserting machine, the combination with a staple driver, and a deflector for engaging the legs of each staple prior to and j during their entrance into the work to curve them progressively as they are driven and thereby anchor them in the work, of staple-guiding means comprising a member having a plane face for guiding the legs of the staple and also the L' crossbar throughout the length of the latter in the staple-driving operation, said member being adjustable toward or from the deflector.

6. In a fastening-inserting machine, the combination with a staple driver, and a defiector for engaging the legs of each staple prior to and during their entrance into the work to curve them progressively as they are driven and thereby anchor them in the work, of staple-guiding means having walls extending substantially as far in the direction of the drive as the deflecting face of the deector for guiding the legs of the staple at their outer sides in the staple-driving operation, and a member having a plane face for also guiding the staple legs and for guiding the crossbar throughout the length of the latter, said member being adjustable relatively to said guiding walls toward or from the deector.

7. In a fastening-inserting machine, a staple i.

driver having a strengthening rib extending along one side thereof, a member located on the opposite side of the driver from said rib and having a plane face for guiding the staple legs and also the crossbar throughout the length of li'' the latter in the staple-driving operation, a defiectorat one end of said, memberI for engaging the staple legs before 'they enter the work to deflect them into the work, and a device movable to transfer the staple into alinement with the driver, said device being recessed to receive the rib on the driver and having staple-guiding portions arranged to extend substantially as far in the direction of the drive as the deflecting face of said deflector.

8. In a fastening-inserting machine, the combination with a driver for driving fastenings, a deflector for engaging `each fastening prior to and during its entrance into the Work to curve it progressively as it is driven and thereby anchor it in the work, and a support for said driver and deector movable to separate them from the work after the driving of the fastening, of mechanism constructed and arranged to retract the driver from the deiiector before they are separated from the work to any substantial extent by the movement of said support.

9. In a fastening-inserting machine, the combination with a driver for driving fastenings, a deflector for engaging each fastening prior to and during its entrance into the work to curve it progressively as it is driven and thereby anchor it in the work, and a support for said driver and deflector movable to separate them from the work after the driving of the fastening, of mechanism automatically operative as an incident to such movement of the support to retract the driver from the deflector.

10. In a fastening-inserting machine, the combination with a driver for driving fastenings, a spring-operated lever for operatingsaid driver, a deiiector for engaging each fastening prior to and during its entrance into the Work to curve it progressively as it is driven and thereby anchor it in the work, and a support for said driver, lever and deflector movable to separate the driver and deflector from the Work after the driving of the fastening, of a member arranged to act on said lever in response to such movement of the support to retract the driver from the deflector.

11, In a fastening-inserting machine, the combination with a spring-operated driver for driving fastenings, means for retracting the driver and for releasing it to drive each fastening, a deector for engaging the fastening prior to and during its entrance into the work to curve it progressively as it is driven and thereby anchor it in the work, and a support for said driver and deflector movable to separate them from the work after the driving of the fastening, of additional means constructed and arranged to impart to the driver a comparatively short retractive movement away from the deflector before said driver and deflector are separated from the work to any substantial extent by the movement of said support.

12. In a fastening-inserting machine, the combination with a driver for driving fastenings, a spring-operated lever for operating said driver, means for operating said lever to retract the driver and for releasing it to cause the driving of the fastening, a deflector for engaging the fastening prior to and during its entrance into the work to curve it progressively as it is driven and thereby anchor it in the work, and a support for said driver, lever and deflector movable to separate the driver and deflector from the work after the driving of the fastening, of a member arranged to act on said lever in response to such movement of the support to impart to the driver a comparatively short retractive movement away from the deflector.

13. In a fastening-inserting machine, the combination with a driverfor driving fastenings, a deflector for engaging each fastening prior to and during its entrance into the work to curve it progressively as it is driven and thereby anchor it in the work, and a support for said driver and deiiector movable forwardly to carry them into position over the work and thereafter movable rearwardly to retract them, said support being mounted also for swinging movement to separate the driver and deector from the worlf. prior to its rearward movement, of mechanism constructed and arranged to retract the driver from the deflector before they are separated from the Work to any substantial extent by the swinging movement of said support.

14. In a fastening-inserting machine, the combination with a driver for driving fastenings, a deflector for engaging each fastening prior to and during its entrance into the work to curve it progressively as it is driven and thereby anchor it in the work, and a support for said driver and deector movable forwardly to carry them into position over the work and thereafter movable rearwardly to retract them, said support being mounted also for swinging movement to separate the driver and deflector from the work prior to its rearward movement, of mechanism automatically operative as an incident to such swinging movement of the support to retract the driver from the deector.

15. In a fastening-inserting machine, combination with a driver for driving' fastenings, a spring-operated lever for operating said driver, a deector for engaging each fastening prior to and during its entrance into the Work to curve it progressively as it is driven and thereby anchor it in the work, a support for said driver, lever and deflector movable forwardly to carry the driver and deflector toward the work and thereafter movable rearwardly to withdraw them from the work, and means for operating said lever in response to the forward movement of the support to retract the driver preparatory to the driving of 'the fastening, said support being mounted also for swinging movement-to separate the driver and deilector from the work prior to its rearward movement, of means arranged to act on the driver-operating lever in such swinging movement of the support to impart to the driver a comparatively short retractive movement away from the dei-lector.

16. In a fastening-inserting machine, the combination with a driver for driving fastenings, a spring-operated `lever for operating said driver, a deflector for engaging each fastening prior to the 1 and during its entrance into the work to curve l it progressively as it is `driven and thereby anchor it in the work, a support for said driver, lever and deflector movable forwardly to carry the driver and defiector toward the work and thereafter movable rearwardly to withdraw them from the work, and means for operating said lever in response to the forward movement of the support to retract the driver preparatory to the driving of the fastening, said support being mounted also for swinging movement to sepa- 1 rate the driver and deflector from the work prior to its rearward movement, of a member arranged to serve as a stop for said lever to limit its driver-operating movement and also to act' on the lever in response to the swinging movement of said support to impart to the driver a comparatively short retractive movement away from the deflector.

17. In a fastening-inserting machine, the combination with a driver for driving fastenings, a spring-operated lever for operating said driver, a deflector for engaging each fastening prior to and during its entrance into the work to curve it progressively as it is driven and thereby anchor it in the work, and a support for said driver, lever and deector movable in a forwardly and downwardly inclined path to carry the driver and deflector toward the work, said support being mounted also for upward swinging movement to separate the driver and deflector from the work after the driving of the fastening, of a stop arranged to engage said lever to limit its driver-operating movement and also to act on the lever in response to the swinging movement of said support to impart to the driver a retractive movement away from the deflector, said lever and stop having cooperating faces inclined similarly to the path of forward and downward movement of the support and arranged to maintain contact with each other during retractive movement of the support along its inclined path.

18. In a fastening-inserting machine, the combination with a driver for driving fastenings, a spring-operated lever for operating said driver, and a support for said driver and lever movable in a forwardly and downwardly inclined path toward the work, of a stop mounted independently of said movable support for engaging said lever to limit its driver-operating movement.

19. In a fastening-inserting machine, the combination with a driver for driving fastenings, a spring-operated lever for operating said driver, and a support for said driver and lever movable in a forwardly and downwardly inclined path toward the work, of a stop mounted independently of said movable support for engaging said lever to limit its driver-operating movement, said lever and stop having cooperating faces inclined similarly to the path of forward and downward movement of the support and the stop being adjustable forwardly and rearwardly in substantially horizontal directions to vary the limit of movement of the driver.

JOHN WILLIAM PRATT. HAROLD LANE.

ISO

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