Improvements in Nailing Machines.
Year: 1897

page_text: Date of Application, 23rd July, 1897-Accepted, 28th Aug., 1897
Improvements in Nailing Machines.
I, FRANK LEE, of Genders' Buildings, 136, Grenfell Street, Adelaide, in the
Province of South Australia, Engineer, do hereby declare the nature of this
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
This invention relates to nailing machines, and consists in certain improve-
ments more particularly applicable to the class of machines employed in fixing
nails with projectin heads into the outer sides of the soles of boots and shoes.
There are already in use in the manufacture of boots and shoes certain machines
for driving small nails or tacks during the process of manufacture, particularly
in fixing the upper to the inner sole. These machines are not, however, suitable
for nails having projecting heads; the difficulty being that such nails are top
heavy and are liable to turn over before coming under the driver by which they
are driven into the sole of the boot.
The object of my invention is to construct a nailing machine whereby nails
having heads of any size, according to the purpose for which the machine 's
devised, may be continuously driven into the sole of the boot, such machine being
arranged in such a manner as to render it impossible for the nails to turn over
during their progress from the source of supply.
In order to accomplish this object, I provide the machine with (a) a device for
separating the nails delivered head uppermost from a supply shoot, (b) a special
contrivance whereby the nails are delivered one at a time head uppermost to the
driver, (c) a contrivance whereby the nails are retained head uppermost during
their passage to the outlet, and (d) with a special device by which, having fallen
to the outlet, the nails are retained upright to receive the blow of the descending
driver.
In the accompanying drawings, Fig. 1 is a side elevation of a nailing machine
embodying my improvements. Fig. 2 is a section of the nailing device, taken on
the line a-a in Fig. 9; Fig. 3 being an elevation of the back of the same.
Fig. 4 is an elevation of the casing, the movable parts being taken away and the
internal openings indicated by dotted lines. Fig. 5 is a corresponding plan.
Fig. 6 is a side elevation of Fig. 3, the jaws for holding the nails and the driver for
driving the same being shown in dotted lines. Fig. 7 is a section on the line b-b
in Fig. 11, showing the driver with a nail in position ready to fall. Fig. 8
represents one of the nailer jaws in side elevation and in front view.
Fig. 9 is
a plan of Fig. 3 showing the ratchet device for controlling the nail distributer and
the actuating lever. Fig. 10 is a view of the underside of the controlling ratchet.
Fig. 11 is a section on the line c-c in Fig. 2 showing the nail distributer. Fig. 12
is a plan of the pawl piece and actuating lever. Similar letters refer to similar
parts throughout the figures.
A is the body of a nailing machine provided with the usual cam device for
raising the driver-bar and with the usual lever attachment for actuating the
awl-bar. These, being well known constructions, and not forming any part of the
present invention, I do not propose to describe in detail.
In order to separate the nails, I provide such a nailing machine with a nose

page_text: casing B having a deep recess C and slot C¹ to which the nails are delivered in
a single row by a shoot, connected with a supply drum, as shown more particularly
in Figs. 4 and 5. In the recess Crevolves the nail distributer D, the latter con-
sisting of a toothed wheel fixed to a stud or spindle D¹, Figs. 2 and 11, and being
arranged so that its upper face is level with the upper edge of the nail shoot. The
nail distributer D is provided with teeth slightly inclined in order to give the nail
point a slight cant forwards, at an angle approximately corresponding with that of
the discharge channel E. The teeth are so proportioned that the space between
each tooth corresponds with or accommodates the shank of one nail, the head of the
rail resting upon the upper face of the distributer D. The nail therefore cannot
fall between the teeth. The nail distributer D is caused to revolve one tooth at a
time in the manner and by the device hereinafter described, whereby the nails, as
they are automatically delivered from the nail supply shoot B₁, are successively
caught and carried round until one by one they reach the nail discharge channel E
(Figs. 2, 4 and 9), when the head of the nail comes in contact with the casing,
causing it to fall away from the teeth. The nail channel E is bored at an angle
in the casing B to meet the driver channel F. The working of the parts is so
arranged that the driver G is always down before each nail falls from the
distributer D, so that the nail, in passing down the nail channel E, falls against
the side of the driver G, as shown in Figs. 2 and 7, and is retained in an upright
position; the passage being not sufficiently large to allow the nail to turn over.
As the driver G rises, the nail descends by gravity into the driver channel F and
thence, point downwards, between a pair of swinging jaws H H mounted on
pins H H in recesses in the casing B (Fig. 4). The jaws H are provided
internally with a cone-shaped recess H² (Fig. 8) into which the nail drops, the point
passing through as shown in Fig. 2. The jaws H are held together by means of
flat springs I secured to the body of the casing by screws I¹. As the driver falls,
the jaws H open and allow the head of the nail to pass through under the impact
of the blow, the closing of the jaws being immediately effected under the pressure
of the springs I, whereupon they are in position for receiving another nail.
This
The awl K is attached to the awl-bar K¹ and works in a channel K³ in the
casing B; the awl-bar effecting the movement of the nail distributer D. To this
end the awl-bar is recessed, as shown more particularly in Fig. 2, an inclined
projecting piece K2 thercon engaging with a lug L (Figs. 2 and 3) on the end of
a lever P which actuates the device for controlling the nail distributer.
controlling device consists of a ratchet M (Figs. 2, 3, 9 and 10) attached to the head
of the spindle D¹ of the nail distributer D. The under surface of the ratchet M
is provided with concavities M¹ wherein engage a spring push-piece M² (Fig. 2)
the concavities corresponding in number with the teeth of the ratchet. The
atchet M is actuated by a pawl N (Fig. 9) pivoted to a pawl-piece O loosely
attached to the spindle D¹. The lever P carrying the lug L is attached to the
pawl-piece O by means of a link P¹. As the awl-bar K¹ rises, the incline on the
projecting piece K³ engages with the lug L pressing the lever P backward;
the latter actuating the pawl-piece O and causing the pawl N to recede. On the
descent of the awl-bar K¹ the lug L is released; the spring P² effecting the
forward movement of the lever P and imparting motion to the pawl-piece O. As
the pawl-piece O turns upon the spindle D the pawl N causes the ratchet M to move
forward one tooth and the spring push M³ to enter the next recess M therein.
As the ratchet M, which is keyed to the spindle of the nail distributer D, moves
forward one tooth at a time, the nails fall one by one from the distributer into the
discharge channel E as before described. The connection of the parts is so
arranged that the awl K having made the hole enters the sole and moves the boot
in the usual way. It then rises allowing the casing to swing back until the nail
is over the hole so formed into which it is then driven by the impact of the driver.
The action of the awl-bar K, as before described, by means of the lever P and
ratchet M causes the nail distributer D to feed one nail to the channel E, through
which it falls and lies against the side of the driver G. As the awl-bar K' descends

page_text: the driver rises and allows the nail to fall into position between the jaws H, the
driver and awl-bar alternately rising and falling; the awl-bar with each action
automatically effecting the feeding of a fresh nail to the driver G.
Having now particularly described' and ascertained the nature of this invention
and in what manner the same is to be performed, I claim :-
;—
1. In a nailing machine, the combination with a shoot for supplying the nails
in a single row of a toothed wheel device for distributing the same at regulated
intervals, substantially as herein described.
2. In a nailing machine, the combination with a toothed wheel device for
distributing the nails at regulated intervals, of a ratchet actuated by a pawl
whereby the nail distributer is carried forward one tooth at a time, substantially
as herein described.
3. In a nailing machine, the employment of a toothed wheel device having its
teeth cut at an angle corresponding approximately with that of the nail discharge
channel, substantially as and for the purpose specified.
4. In a nailing machine having a toothed wheel device for distributing the nails,
the employment of a slot (such as C¹) arranged in the body of the casing so that
on the nail head coming in contact with the casing it is automatically caused to
fall into the discharge channel, substantially as herein described.
5. In a nailing machine, the combination of a toothed device, having its teeth
cut at a suitable angle, a nail discharge channel leading into the driver channel
and a casing so arranged as to cause the nail to leave the wheel and fall into such
channel, substantially as herein described.
G. In a nailing machine, the combination and arrangement of parts whereby,
on arriving from the discharge channel, the nail falls against the side of the driver
and is retained in an upright position until it descends between the nailer jaws,
substantially as herein described.
7. In a nailing machine, the employment of the motion of the awl-bar for
actuating the device for distributing the nails at regulated intervals and
supplying them to the driver one at a time, substantially as herein described.
8. In a nailing machine, the combination, with a toothed wheel for delivering
the nails at regulated intervals, actuated by a ratchet device, of a lever provided
with a lug piece actuated by the awl-bar, substantially as herein described.
9. In a nailing machine, the combination with a device for delivering the nails
at regulated intervals, of a ratchet (such as M), a pawl-piece (such as O), and a
lever (such as P) having a lug (such as L) actuated by the awl-bar, substantially
as herein described and for the purpose specified.
10. In a nailing machine, the combination with the awl-bar having a recessed
piece (such as K2), of a lug piece (such as L), fixed to a lever (such as P), for
actuating the nail distributer, substantially as herein described.
For the Applicant,
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.