Improvements in Machinery for Nailing Boots and Shoes.
Year: 1897

page_text: Date of Application, 27th Aug., 1897-Accepted, 6th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Machinery for Nailing Boots and Shoes.
I, JOSEPII ANDREA CAVALLI, located and doing business at No. 822 Montgomery
Street, in the City and County San Francisco, State of California, United States
of America, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:-
With the
My invention relates to nailing machines for inserting wire nails into boots and
shoes for the purpose of securing the uppers to the soles; and my object is to
provide a machine in which the operation of feeding the wire, driving it into
shoes, and cutting it off close to the sole shall be automatically performed with
much greater rapidity than is possible with machines at present in use.
mechanism for performing these functions I also combine various special modes of
adjustment by which the sizes of nails can be regulated according to the class
of work to be done, thickness of the soles, &c., as well as for changing the spacing
of the nails in the sole according as to whether a greater or lesser number are
required.
My invention also includes specially devised cutters which by one operation cut
off from the wire a nail just driven and form a chisel point for the succeeding nail.
It also includes special means for driving the machine and for throwing the driving
shaft into and out of gear with the connected mechanism either by the act of the
operator or automatically, and, finally, it includes various special features of con-
struction which need not be particularly referred to her, but which are fully
hereinafter described as well as shown in the accompanying drawings, in connec
tion with which this Specification should be read.
In the drawings,
Figure 1 is an elevation of the right hand side of the machine relatively to
the front.
Figure 2 is a similar elevation of the left side.
Figure 3 is a front elevation.
Figure 4 is a detail front elevation of the double cam which operates the wire
cutters.
Figure 5 is a detail vertical sectional elevation of the same.
Figure 6 is a plan of the top of the machine.
Figure 7 is a sectional plan of the top of the machine with the top plate removed.
Figure 8 is a detail plan view of the shoe guide.
Figure 9 is a front elevation of the same with its front plate removed.
Figure 10 is a detail of the front plate last named.
Figure 11 is a vertical section of the wire feeding and cutting mechanism.
Figure 12 is a sectional view on the irregular line y-y of Figure 11.
Figure 13 is a plan view of the cutting knives.
Figure 14 is a cross section of the same on the line of Figure 13.
Figure 15 is a horizontal plan and section through the driving cam.

page_text: mechanism.
Figure 17 is a similar elevation of the cam for raising the standard which
supports the shoe holder or horn.
Figure 18 is a front elevation of the cross head for oscillating the upper part of
the machine.
Figure 19 is a side elevation of the clutch forming part of the driving mechanism
with the frictional driving pulley removed.
Figure 20 is a plan of the same with the pulley in section.
Figure 21 is a front elevation of the same.
Figure 22 is a side elevation of brake mechanism.
Figure 23 is a top plan of the same, partly in section.
Figure 24 is a detail plan of the trigger.
Figure 25 is a front elevation of the same with the outer casing removed.
Figure 26 is a rear elevation of the devices shown in Figure 25.
Figure 27 is a detail of top of machine, showing the reel for the wire.
Figure 28 is a detail front view of the device for releasing the treadle which
controls the engagement of the driving gearing.
Figure 29 is a detail vertical cross section of Figure 28.
Figure 30 is a detail sectional view of a portion of the standard H.
Throughout the drawings A represents the frame of the machine by which all
the operative parts are supported, and A a movable upper extension of the same.
B is the driving shaft, which is journaled transversely at the rear of the frame A
and has keyed at one end the pinion 1, Fig. 1. At the other end of the shaft B
is a loose Hanged or dished belt pulley B, having friction surfaces on opposite
sides. B and B are friction disks having beveled edges, the former, 133, secured
to the shaft by feathers 2, so as to have a sliding motion thereon, and the latter
or outside disk, B³, secured to the shaft, Fig. 20.
C is a lever loose on the shaft and provided with inclines 3.
C is a member of a clutch mounted upon the driving shaft which has inclined
recesses 4 to receive the inclines 3.
A rod 6 connects the lever C to a slot in the treadle C which extends to the front
of the machine convenient to the operator. When this treadle is depressed and the
lever C moved, the opposing inclines force the lever outward and against the inner
friction disk 12. This forces said disk against the pulley B₁ and also forces the
latter against the outer friction disk 133, Figure 20 so that it is secured to the
driving shaft by frictional contact upon both its beveled flanges, springs 7 between
the pulley and disks being compressed.
The treadle lever is pivoted at. S to the frame. When its forward end is
depressed to start the machine, it catches under a notch 10 in a pivoted plate 11
and until it is released the machine will be in gear with the driving shaft. The
depression of the treadle extends a tension spring 12, connected in front to the
frame and at the back to the lever C, Figure 2.
The friction surfaces are therefore held in engagement against the tension of
this spring. Should the treadle be released, the spring 12, pulling on the lower
end of the lever C, will disengage the frictional surfaces (by a movement the reverse
of that described before) and will return the treadle to its normal position, as in
Figures 2 and 3, where the machine is out of gear with its driving shaft.
The treadle is released by the mechanism shown in Figures 3, 28 and 29. The
pivoted plate 11 has a slot 11, through which passes a rock shaft, on one end of
which is a treadle 13. On the shaft of the treadle is a small cam 13 which by the
depression of the treadle is caused to bear on the edge of the slot and move the
plate 11, releasing the treadle C3 from the notch 10. The end of the treadle bears
normally upon a stop 14 on plate 11 and is held there by a spring 14, the cam
being inactive until the treadle is depressed. The spring 14 extends from a con-
venient point on the main frame to the arm n on the shaft or pivot of treadle 13.
When the main treadle C is released from the holding plate 11, it is immediately

page_text: raised by the recoil of the tension spring 12. Automatic means are also provided
for accomplishing the same result in case of accident to the machine or interruption
in its proper operation, and such means will be hereinafter described. The connec-
tions just described are to put the starting and stopping of the machine under the
control of the operator in its ordinary operation.
The pinion 1 on the driving shaft gears into a spur wheel 15, mounted upon a
transverse shaft 16 at the rear of the main frame. At the other end of this shaft,
that is, at the left of the machine as viewed from the front, is a pinion 17, which in
turn drives the large gear wheel C³ on the center shaft C. From the continuous
rotation of this shaft the operative parts of the machine derive their different
automatic movements by means of a series of cams secured to said shaft and giving
motion directly to the mechanisms for carrying out the whole process of nailing
shoes.
Figure 15 is referred to to give a clear understanding of the relative positions
of the series of cams on the shaft. The cams are lettered D, E, F, G and G¹, and
their individual functions are as follows: Cam Doperates connections which give
a horizontal vibratory movement to the shoe holder or horn and a like movement
simultaneously to the upper part A¹ of the frame, these movements accomplishing
the proper spacing of the nails in the shoe. Cam E is connected to the mechanism
for feeding the wire and forcing it into the shoe, such mechanism being carried
by the upper or movable part of the frame. Cam F operates the connections by
which the shoe holder or horn is pressed upward and held while the shoe is being
nailed. Cams G and G¹ form a double cam operating the reciprocating wire
cutters, which cut off the wire close to the shoe after it has been forced in and by
the same operation form a chisel point upon the end of the wire which forms the
nail succeeding the one just driven. With these mechanisms are supplied various
adjustments for adapting the machine to various kinds of shoes, to soles of different
thickness, &c. all of which are hereinafter described in detail. All of these cams
cams work in recesses in the solid part of the frame A, cams D, E and F being
placed close together at the right side of the frame and cams G and G' at the left
of the frame (Figure 15) it being understood that I refer to the right and left
sides of the machine as viewed from the front. Referring first to the movements
derived from the cam D, it will be seen that a slide DI surrounds the cam and is
provided with an inwardly projecting incline 19. The cam has similar projec-
tions d, (here shown as three in number) so that three movements of the slide
are produced by each revolution of the cam. The slide is provided with projec-
tions 20 which form guides for it as it moves in the frame. At each forward
movement of the slide, that is, three times for each revolution of cam D), one of
these projections strikes a block 21, adjustable in an angular pivoted lever 22,
Figure 15. The block 21 has a small projection 23. The movement of the
slide D' is invariable; but the vibratory motion of the lever 22 can be changed by
adjusting the block 21 nearer to or further from the center of vibration, which is
the vertical shaft D³, to which the lever 22 is secured by set screws 24. This
adjustment is accomplished by means of a screw 25, which passes through a
threaded opening in the block 21, the screw turning but not traveling in a
bearing 26, formed in the end of the lever. The projection 23 can thus be brought
nearer to or further away from the center of oscillation thus providing practically
an adjustable lever of variable oscillation driven by a cam of constant stroke. The
lever 22 extends forward and is secured to or forms part of a yoke 27 projecting
from the front of the machine, and secured to the upper part H' of the vertical
standard H. Figure 1 gives a clear view of this construction.
The standard H is stepped at its lower end in a long stationary sleeve 28, which
permits of the requisite vertical movement hereinafter described. The stand-
ard H H moves vertically as a whole, but only the part H has the lateral
horizontal sweep or oscillation communicated by the elbow lever 22, as just
described. This being the case, the lower end of the part H¹ has a roller 29, which
rests in a depression or groove 30 at the top of part and forms a guide for the

page_text: oscillatory motion, the limit of which is the length of such depression. (See Fig. 3
for the best view of this feature.) The shoe holder or horn H is secured to the
standard H and derives from it the same oscillating motion as well as the vertical
movement alluded to above.
It has been stated that the center of the oscillation produced by the cam D is
the shaft 13, secured to the lever 22 and stepped in the frame, as shown in Figure 1.
The shaft D extends upward through the solid stationary part of the frame and
into the movable or oscillating part A'. This part of the frame carries the wire
cutting and feeding mechanism, and its movement must therefore be in exact
unison with those of the shoe horn, so that successive nails shall be spaced and
driven at the proper intervals. The oscillating motion of the frame A¹ depends
entirely upon the shaft D, and hence a single adjustment by the screw 25 will
regulate the throw of both the shoe horn and the top of the frame. The shaft D³
is secured to the movable frame by the key 31. (See Fig. 11) Two plates 32, 33
one secured to frame A and the other to frame A', engage by means of a circular
rib and groove and form a turn-table upon which the frame A', with all the
mechanism supported by it, swings bodily, making three oscillations at each
complete rotation of the driving cam D, during which three nails are driven and
cut off. These three positive strokes of the cam, which gives the oscillating
motion just described, are effected against the pressure of the returning spring 34,
Fig. 7, interposed between the movable and fixed parts of the frame, the pressure
of which can be regulated by the projecting screw 35. This spring therefore
returns the movable frame, its operating shaft, the shoe horn and standard, and
the lever 22 to position as soon as each projection on cam D has operated them in
the contrary direction.
In addition to its vertical and oscillating movement the shoe horn is mounted
upon its supporting standard so as to swing freely upon the arc of a circle and thus
enable the operator to turn the shoe gradually around, so as to nail along the
whole edge of the sole. This is accomplished by pivoting the part H' of the
standard, as shown at 9, Fig. 1, and Fig. 30 so that it can swing with the shoe horn
and at the same time oscillate.
The vertical movement of the standard and shoe horn is originally given by the
workman, after the shoe is placed upon the horn, by the treadle I. The purpose
of this movement is to force the sole up against the shoe guide J 'just below the
point where the operation of nailing takes place. It is necessary that the shoe be
held perfectly rigid while being nailed, and also after each nail is driven the shoe
should yield a little, so that it can be put into position for receiving the next nail.
This alternate pressure upward and yielding downward is automatically effected
by the cam F, through proper connections, independent of the treadle I, which is
only employed to raise the horn after a fresh shoe has been placed upon it. As the
amount of vertical movement depends upon the thickness of the soles, I have
provided an automatic adjustment or stop mechanism for limiting the upward
motion at the proper time. First as to the non-automatic raising of the shoe horn
standard. The treadle I is connected by a slot and pin to a link 40, which in turn
is jointed to a pivoted lever 41. (See Fig. 1.) An arm 42 and centrally pivoted
lever 43 are connected to a boxing 44 on the shoe standard. A tension spring 45,
connected to the arm 42 and the main frame above it, returns the parts to the
position shown in Figure 1. The depression of the treadle through these connec-
tions will therefore raise the whole standard bodily, and the weight i on the
treadle lever acts as a counterpoise and raises and keeps the treadle in the position
shown in Fig. 1 while the machine is at work.
The automatic vibration of the shoe standard is as stated before, produced by
the rotation of the cam F, having the projections 46, a detailed elevation of which
is shown in Fig. 17. A vertically moving slide 47 surrounds the cam, having a
stud 48 and a retracting spring 49, Fig. 1. This slide is connected to an arm 50,
having a pawl 51. A quadrant ratchet 52 forms part of or is secured to the
lever 43, so that at each downward motion of the slide 47 the pawl engages with the

page_text: quadrant, and the lever 43 being connected to the shoe standard the latter is
slightly lifted three times during each rotation of the cam and drops three times
by the tension of the spring 45 the same distance alternately. This eases the
pressure on the shoe and enables the workman to turn the horn.
The shoe guide J, before referred to, is adjustably secured to the main frame
at the front just below the opening through which the wire is fed and adjacent
to the top of the shoe horn, when the latter is pressed upwardly. This guide is
shown in detail in Figs. 8, 9, and 10. A bracket 53 is secured to the main frame
in which the guide is movable for adjustment. A transverse pin 54 extends
through the bracket having a partial gear 55, the guide being provided with a
rack 56 and tail guide 57. A handle 58 on the pin 54 enables the guide to be
adjusted inwardly or outwardly, while its vertical adjustment, to adapt it to soles
of different thickness is accomplished by the screw 59 in the supporting bracket.
A spring 60 holds the guide down against the screw.
The regulation or adjustment of the vertical vibration of the shoe standard and the
feeding of the proper amount of wire are accomplished by a special mechanism
connected to the box 44 on such standard. This adjustment is quite independent
of the stroke of the cam F, which is invariable. Figs. 1 and 2, in connection with
Figure 6, illustrate the construction referred to. On the left side of the machine
the boxing 44 is connected to an arm, 61, pivoted to the frame and deriving an
oscillating motion from the rise and fall of the shoe standard. To this arm is
pivoted the long two part connecting rod 62, which extends to the upper end of
the machine and is formed at its top into a rack 63. The connection between the
two parts of rod 62 is a sliding one, (by means of a plate 64 and a slot 65) so that
the lower part of rod 62 may have an independent motion to a certain limited
extent; limited, that is, by the upper part of said rod. The shoe standard can
therefore only rise as far as the lower rod 62 is permitted to travel. The rack
engages with a pinion 66 upon a transverse oscillating shaft 67, the latter carrying
a cam 68. This cam is turned by the upward movement of the rods 62 until it
strikes an adjustable stop 69 on bar 74. The stop is held by a screw and can be.
placed at any angle relatively to the cam 68, so as to limit the stroke of the rods 62.
at any point desired. Fig. 1 shows this device clearly, the stop being shown in
dotted lines. This adjustment is made when the work commences, and remains
unchanged as long as soles of the same thickness are being nailed. The workman
by depressing treadle I, raises the shoe as far as it will go and adjusts the shoe
guide. The same movement turns the cam 68 to a certain point, which is the
proper limit of motion.
The middle cam E of the series of three at the right side of the machine drives
the mechanism for feeding the wire from which the nails are cut and which. is.
located upon the movable or swinging part of the frame. The cam is like those
before described, having three projections which bear upon and move vertically
a surrounding slide 70, having a spring 71, Figs. 1 and 16. A vertically moving
connecting rod 72-bears upon and lifts at each upward stroke a pivoted arm 73.
This arm oscillates the slide bar. 74, to which is secured by a slot. and pin a fan
shaped plate 75. The plate 75 is mounted upon a transverse pin 77 in the movable
frame A', which also carries a ratchet wheel 78, the latter being moved inter-
mittingly by pawls 79 on the plate 75. Figure 7 in connection with Figure 1
shows this construction clearly. The upward oscillation of plate 75 is simply to
move the pawls back to take a new hold on the ratchet; but the downward oscilla-
tion which drives the ratchet is imparted by the strong spring 80, connected to the
fraine and to the plate 75, at each release of the connecting rod 72 by the actuating
cam that is, three times at each rotation of the cam.
The other end of the pin 77 has mounted upon it a spur gear 81, which is the
driving wheel for actuating the series of connected pinions 82, 83, 84 and 85 on
the shafts of the feed rollers or wheels 86, 87, 88, and 89. These rollers are
arranged in upper and lower pairs, Fig. 11, and have grooved circular edges,
between which the wire is tightly clamped and fed downward through the channel

page_text: or passage 90 in the movable part of the frame, so as to emerge at a point in close
proximity to the tip of the horn. Fig. 27 shows a reel for the wire mounted at
the top of the frame, and in connection with Fig. 11 clearly indicates the relative
position of these parts.
The boxes in which the front feed rollers are journaled are adjustable toward
and from the rear rollers, as shown in Figs. 3 and 11. The boxes are guided in a
recess in the front of the movable frame A'. Plates 91 bear upon both boxes,
which can be pressed inward by a cam 92, mounted upon a pin 93 and operated
by a handle 94. The spring 95 throws the plates 91 outward as the cam is released,
while another spring 96 (dotted lines, Fig. 11) bears upon both boxes for the
same purpose.
The invariable stroke of the cam and its connecting rod 72 is changed into a
regulated stroke of the plate 75 by means of the stop 69 and cam 68, before
described, in order to feed and drive only the proper amount of wire. When the
cam 68 is first adjusted by the upward movement of the shoe standard, it is locked
in place as soon as the machine is thrown into gear by the brake mechanism
shown in Figs. 22 and 23. On the shaft 67 is a brake wheel 117, having a grooved
periphery. In a boxing 118 is secured a strap 119, having a curved V-shaped
inner edge in proximity to the wheel. A brake shoe 120 slides in the box and is
forced constantly away from the wheel by springs 121 in slots formed in the shoe
and which bear against studs 122 projecting from the box 118 into the slots. A.
cam 123 is secured to a pin 124, mounted in the boxing 118. Onb end of a rock
shaft 125 mounted in the rear upper end of the main frame, is connected to the
lever C, which controls the main clutch; by a rod C³, Fig. 2. The movement
necessary to operate the clutch pulls down this rod and rocks the.shaft 125. The
other end of the rock shaft has a crank 130, connected by adjustable arms 120 127
to a crank 128, secured to the pin 124. When the clutches are engaged, the rod C³
is pulled down, the cam 123 is turned, and the brake shoe forced against the brake
wheel, squeezing the latter between the shoe and the strap 119 and stopping the
shaft 67, with the cam 68 in proper position, and also stretching the spring 80,
which actuates the plate 75. The cam remains in this position until readjusted
by a shoc of a different thickness of sole.
It, will now be understood from the foregoing that the slide 74, connected to
the plate 75, which drives the feed ratchet, can only move down in' driving and
feeding until the stop 69 strikes the cam 68, and that distance will be, exactly
proportionate to the thickness of the sole producing such a movement of the feed
rollers as will feed exactly the proper amount of wire for that thickness. The
actuating spring 80 is connected at one end to the crank 130, which becomes a
fixed part of the main frame as long as the brake is set.
It will be understood that at the downward movement of the plate 75 the proper
length of wire is not only positively fed by the rollers, but is also forced directly
into the sole without any rotary or screw action, such as is usually employed in
nailing machines where threaded wire is used. Nails so forced in are held more
permanently than is the case where each nail is screwed in so as to form its own
female thread in the leather. In the latter case the nails are liable in time to
work loose in the threads thus formed. Where the nails are driven in, on the
contrary, the threads of the wire enter between the fibers of the leather and are
thereby held so firmly that it is practically, impossible for them to wear or work
loose.
The last step in the operation of nailing is the cutting off of the wire close to the
sole after each nail has been driven. To facilitate the driving of the wire into the
leather, each nail is formed with a chisel point, and I have devised cutters which,
while they cut a nail just driven squarely off even with the sole, will at the same.
time form the chisel point upon the nail which is to be driven next. These cutters
reciprocate just below the point where the wire emerges from its feed channel or
passage and just above the shoe guide. The position of these cutters relatively
to the whole machine is best known in Fig: 3, while for details of their construction

page_text: and movements reference is made to Figs. 2, 4, and 5 and Figs. 11 to 14
inclusive. These cutters K are driven primarily by the cams G G¹, before referred
to, which are mounted near the left end of the transverse shaft which carries and
drives the other cams already described. They constitute really a double cam
and give a reciprocating vertical motion to a double slide K', formed of the slotted
plates secured together and having upper and lower projections 100 101, Fig. 4,
and Fig. 5. The inclines 102 103 on the respective cams are set slightly out of
line with each other, so that a slight interval elapses after one incline 102 hns
thrown the slide in one direction before an incline 103 throws it in the opposite
direction. Fig. 4 makes this clear. An incline 102 has just thrown the slide up
and is on the point of releasing it, while an incline 103 is on the point of striking
the shaded projection 101 at the lower part of the slot in the slide in order to move
the slide down. The connections from the slide for operating the cutters are shown
in Fig. 2. An arm 104 is secured to the slide, projecting upwardly through a fixed
guide 105. To this arm is adjustably connected by a slot and pin a series of
swinging arms 100, 107, 108, the last of which receives an oscillatory motion which
it communicates to the transverse shaft 109, to which it is secured and which rocks
in the main frame. Upon this shaft is a pinion 110, which engages above and
below with racks 111, formed in slots in the reciprocating cutter bars K, Fig. 11.
The rock shaft thereby gives a simultaneous but opposite reciprocation to the two
cutters, producing a very rapid shearing action against the wire.
The cutters proper are removable from the bars K, in order to sharpen them.
Their shape will be best understood from a comparison of Figs. 13 and 14, the
Hatter being a section on the line a, a, of Fig. 13, from which it will be seen! that
both cutters are beveled and notched so as to form opposing cutting edges or
shears y, y, of inclined or beveled shape, and to allow the wire to pass freely down
between the cutters when the notches are directly opposite to each other. These
cut the wire simultaneously, so as to remove from opposite sides small triangular
pieces of waste metal, the result being the formation of a double beveled or chisel
point on the wire being fed and a squarely cut off nail in the shoe. The forward
ends of the cutter bars are guided by a strap 112, secured to the frame and having
a hole through which the wire passes. The racks and pinion form guides for the
rear ends of the cutter bars.
The wire fed by this machine may be of any desired kind; but I prefer to uso
brass wire of triangular cross section formed with a thread extending spirally, so
that alternating projections and notches are produced at the angles. This wire I
have found to be the most satisfactory, and when pushed into the sole instead of being
screwed, nails formed from it make an absolutely secure and permanent fastening.
Heretofore in this Specification I stated that automatic means were provided, for
throwing the machine out of gear and stopping it. Such mechanism was stated
to be independent of the ordinary means of throwing out the clutches-viz., the
treadle 13, which when depressed releases the treadle C. When all the nails
have been driven excepting the last one, it is desirable to stop the machine and
case the upward pressure of the shoe standard preparatory to placing another shoe
on the horn. At the same time the last nail must be driven and cut off accurately
like the others. I have therefore provided special connections which commence
to operate at the time referred to, but do not complete their work of stopping the
machine until the cams have made their stroke required to feed, insert, and cut
off the last nail. This mechanism is shown in Fig. 2, and is entirely independent
of the mechanism so far described while the ordinary operation of nailing is going
on. To distinguish these connections, therefore, I designate them on the drawings
by small letters instead of numerals.
To bring this automatic mechanism into operation, the operator pushes the
foot lever a inward, which operation causes the following action to take place:
First, it raises the bent pivoted arme into the path of the three projecting studs
or rollers c, revolving with the gear C. This raising of the arm c is done by the
upward movement of the arm f, which is secured rigidly to the said lever a by a

page_text: screw at point a³, and has a roller or stud a projecting from its inner end, which
bears upwardly against the under face of the arm e, holding the same raised as long
as the pressure is kept upon the foot lever a.
Second, the gear C, rotating in the direction of the arrow in Fig. 2, brings
one of the rollers e in contact with the curved upper face of the end of the lever e,
carrying it forward until the roller c disengages as it rotates upward and away
from it, and pushes the slotted slide g inward and out through its box far
enough to allow the trigger k to lock itself by the detent outside of the said box k,
as shown in Figs. 24 and 25.
Third, the moment the operator notes that this effect has taken place and before
another of the rollers e upon the gear C' has had time to strike the slide 9, which
is now projecting into the path of the said rollers, he releases the foot lever a
which flies back to its normal position by the coil spring, fastened between the
bracket and the end of arm f, forming part of said lever a, and this allows the
roller c, immediately next in rotation to the one that pushed the slide g into
the path of the rollers, to strike with a vibrating or glancing blow upon the upper
surface of the said slide g, depressing it, together with its box h, which is pivoted
upon the stud or pin ", secured to the frame of the machine, and pushing down-
ward as well the rod m, pivoted to the said box at its inner face and connected at its
lower end to the arm on the pivot of the treadle 13. When the slide g, as
already explained, is thrown into the path of the rollers on the gear wheel, the
machine continues working, driving and cutting off the last nail until the slide g
is struck by one of the rollers c and the trigger & released, which release takes place
as the roller glides off from the face of the depressed slide g, striking the upper
head of the trigger k, causing the detent to lift clear of the front edge of the
box and allowing the spring to pull the slide once more within the box
(see Fig. 26); but just as this takes place, the machine is completely stopped, for
the depressing of the rod m turns the cam 13 on the pivot pin of treadle 13, moves
the swinging catch plate 11 outward, releasing the foot treadle C², and permits the
spring 12 to throw out of engagement the friction mechanism that connects the
main shaft of the machine with the loose driving pulley upon the outer end of same,
before another motion of the wire feed mechanism can take place.
Fourth, the moving out of the friction driving mechanism also releases the
brake by pushing the connecting rod the reverse of the movement before described
for setting the brake. As the lower end of lever C is pulled forward it strikes a
projection on a transverse rock shaft o. (Refer now to Figs. 1 and 2.) The
shaft o extends through the frame, and on its right hand end is an arm p. con-
nected to the push bar 7. The purpose of the latter bar is to throw the pawl 51
out of engagement with the quadrant 52, thereby letting the shoe standard fall.
This is accomplished by a swinging arm pl, the rocking shafts of which has a stud t,
which, when turned, strikes and positively lifts the pawl out of engagement.
parts of the machine are now free and disengaged.
All
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:-
1. In a nailing machine, and in combination, a main frame having a horizontally
vibrating upper part carrying wire, driving and cutting mechanism; a shaft
journaled in the main frame and carrying an actuating cam, a pivoted shoe horn
standard, a vertical shaft journaled in the main frame and extending into the
movable part of the said frame; a lever secured upon said shaft and connected
to said shoe horn standard, and connections operated by said cam for moving said
lever, and thereby vibrating said standard and the upper part of said frame in
unison, substantially as described.
2. In a nailing machine, a main frame having a horizontally vibrating upper
part carrying wire driving and cutting mechanism, a cam shaft journaled in the

page_text: main frame and carrying an actuating cam, a pivoted shoe horn standard, a vertical›
shaft, journaled in the main frame and secured to the upper movable
frame, an angular lever secured to said shaft and connected .to::. the,
shoe horn standard, and 0 block on one arm of said lever capable
of adjustment relatively to said vertical shaft; whereby the movement of said lever,
standard and movable frame can be varied, substantially as described.
3. In a nailing machine, a group of cams, each having an invariable stroke and
all mounted upon a common shaft, in combination with a vertically movable and
oscillating shoe horn or holder, an oscillating wire feeding and driving mechanism,
a reciprocating wire cutter, and adjustable connections from said cams to said
separate mechanisms, whereby the invariable strokes of the cams can produce
variable strokes by adjusting such connections, substantially as described.
4. In a nailing machine and in combination, a vertically adjustable shoe horn
or holder, a variable stop or cam connected thereto and adjusted by its upward
movement, driving gearing engaged and disengaged by a sliding clutch, a brake
for the variable stop connected to said clutch and set by its engagement with the
driving gearing, wire feeding and driving rollers intermittently operated; and a
sliding rod for actuating such rollers having a stop to bear upon said cam, and
thereby regulate the feed of the wire according to the position of said cam,
substantially as set forth.
5. A work support or shoe holder for a nailing machine, composed of a vertically
movable standard formed in two parts pivoted together, an oscillating extension
of said standard and a shoe horn secured to said oscillating extension, substantially
as described.
G. In combination with the vertically movable shoe horn and standard, the
cam F, a reciprocating slide surrounding such cam and having a pawl and a
quadrant rack connected to said standard whereby, said standard receives a vertical
vibration substantially as described.
7. In a nailing machine and in combination a rotary cam E, a vertically recipro-
cating slide, a pivoted plate carrying pawls, a ratchet wheel, a spring for operating
said ratchet wheel, gearing connected to said ratchet wheel, and wire feeding rollers
operated by such gearing, substantially as described.
8. In a nailing machine, and in combination a rotary cam E, a slide bar 74,
connected to and operated by said cam having a stop 69, an adjustable cam 68,
for limiting the stroke of said slide bar, the pivoted plate 75 connected to said
slide bar and having pawls, a ratchet wheel, wire feeding rollers, gearings con-
necting the ratchet wheel shaft to said wire feeding rollers, and a spring for driving
said ratchet and gearing when the connections between said cam and slide bar aro
released by said cam, substantially as described.
9. In a nailing machine the main frame A, in combination with the oscillating
frame A', a turn-table on which said frame A¹ oscillates, a shaft journaled in the
main frame and secured to the oscillating frame, and means for oscillating said
shaft, substantially as described.
10. In a nailing machine and in combination, a shoe horn or holder, rolls for
feeding continuous wire and having a rotary motion only in a vertical plane whereby
they feed and drive the wire by a single motion, and reciprocating cutters, arranged
relatively to the shoe horn and to the feeding and driving rollers so as to sever
the driven portion of the wire from the continuous wire, substantially as described.
11. In a nailing machine, wire feeding and driving mechanism, wire cutting
mechanism, an oscillating shoe horn or holder vertically movable, a shaft having
cams connected to such mechanisms, driving gearing, a clutch for engaging and
disengaging said driving gearing, a treadle C³ for causing said clutch to engage
the driving gearing, and a spring for disengaging the clutch when said treadle is
released; all in' combination with an independent mechanism having a supple-
mentary treadle, but connected to the treadle C; said independent mechanism
being normally inoperative, but capable of being set in such position relatively

page_text: to the cam shaft as to be acted upon by said cam shaft, to release the main treadle,
and thus to disengage the clutch mechanism, substantially as and for the purposes
set forth.
Dated this 26th day of Avonct 1807
SLOAN & LLOYD BARNES,
26 Castle Street, Liverpool, Agents for the Applicant.