An Improved Nail-driving Tool.
Year: 1890

page_text: Date of Application, 30th Aug., 1890-Accepted, 4th Uct., 1850
COMPLETE SPECIFICATION.
An Improved Nail-driving Tool.
I, WILLIAM BROOKLIN BRADY, of Austin, in the County of Travis and State of
Texas, United States of America, Gentleman do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly describod
and ascertained in and by the following statement :-
My invention relates to an improvement in magazine nail-driving tools.
It consists generally speaking, of a spring-returning hammer arranged in a suit-
able shell with a detachable magazine for holding the nails to be driven and a set of
levers operated by the movement of the hammer-bar to arrest and release the nails at
intervals during the operation of the device.
The tool is intended for use more particularly for driving shoe-nails into the soles
of shoes; but of course I do not wish to have the device limited to this use as it may
be used for many other purposes.
In the drawings illustrating my invention and accompanying this Specification,
Figure 1 is an elevation of the tool complete with the magazine attached.
Figure 2 is a longitudinal sectional view of the same.
Figure 3 is an elevation of one-half of the shell of the tool.
Figure 4 is a top or plan view of the magazine detached.
Figure 5 is a detail showing the arresting and detaining levers for the nails in
normal position and in relation to the shell of the tool and the controlling-spring for
said levers.
Figure 6 is a transverse section of the magazine.
Similar reference letters and numerals indicate like parts in all the figures.
Referring to the drawings, A. B. are opposite halves of the shell of the tool, either of
which is hollowed out to receive the driving-bar, the detachable die-rod, the arresting
and detaining lovers, and the spring for the latter. Within the shell are formed also
slots for the downward movement of the nails and a longitudinal groove serving as a
guide to a spline secured to the driving-bar.
1 is the slot provided for the detaining and arresting levers 2, 3, the latter of which
are provided each with flanges at their lower ends serving as toes to support the
nails by their heads. These levers have a common centre of motion or fulcrum in a
screw 19, secured in the shell of the tool.
5 is the spring secured at 24 in the shell of the tool, the ends of which bear,
respectively against offsets c and d of the levers 2, 3 to hold them in normal
position.
11 is the driving-bar of the tool, to which is adjustably secured at one end the
die-rod 12, and at its opposite end is the head or knob 13, which receives the
blow from the hand or a hammer. The driving-bar 11 is notched at 14, for a
purpose hereinafter to be explained. A coil spring 15 encircles the driving-bar 11
and is held between the head or knob 1.3 and an annular shoulder 6 of the shell A. B.
The driving-bar 11 is provided with a spline 4 which moves in the longitudinal
groove g of the shell serving as a guide. 16 is the magazine for the nails, secured
obliquely to the shell of the tool in dovetail grooves 10. The said magazine is pro-
vided with an opening 25 to receive the nails, said opening being normally covered
by a spring-plate 17, provided with a flange on its free end, against which the
thumb or finger is pressed when said opening is to be exposed. The magazine 16
is provided with an enlargement 18 running longitudinally the magazine's length,
to receive and hold the nails by their heads as they move downward toward the point
in the shell whence they are to be driven. The magazine 16 is closed at its upper
end, and is provided with a longitudinal slot, through which may be observed the
number of nails contained therein.

page_text: In the shell of the tool, just bolow the junction of the magazine, is a diaphragm
provided with an opening, through which project toes a b of the levers 2, 3. At the
hottom of the shell of the toul a sorow-threaded nipple 20 is formed, over which is
secured a screw-threaded nut 21, which assists in holding the two parts of the shall
together, the other means for holding said two parts being with screws h.
In order
that the magazine may be firmly held to its place against the shell of the tool, I
provide a set-screw i, which runs through an offset of the shell and into the base of
the said magazine. To the nut 20 is secured a spring 22, bent at its free end and
adapted to pass through an opening in said nut and project within the bore 7 for
the die 19. This spring 22 is intended to hold the mail to be driven until the die
reaches it in its downward movement.
The driving bar 11 is provided with an anti-friction roller e to bear upon
levers 2, 8.
The operation of my tool may be described as follows: The magazine 16 being
filled with nails and in position on the shell of the tool, the said nails gravitate down-
ward, until arrested by the toe a of the lever 3. The driving lar being forced
against the tension of the spring 15, it releases the lever 2, which, being acted upon
by the spring 5, the long arin of said laver drops into the notch 14 of the driving-bar,
and the toe is thrown forward to take the first nail from the tue a of the lever 3.
When the roller-bearing of the driving-har reaches the bearing d of the lever 3, said
lover is moved to withdraw its too and drop the first nail to the toe h. Upon
the rocoil of the driving-har lever 2 drops its nail, which finds its way to the ond
of the small spring 22. When the driving-har is again brought down quickly, the
die 19 forces the nail past the said spring 22, and the levers, as previously described,
drop another nail, which finds its way to the said spring 22.
Having now particularly described and ascertained the nature of my said inven-
tion anf in what manner the same is to be performed, 1 declare that what I
claim is :-
The combination, with the shell of the tool formed with recesses and a guide-groove,
as described, the driving-lar provided with notch 14, die 12, and roller e, spline 4,
guided in the groove g of the shell, and the returning spring, of the lovers 2, 3,
having toes a, b, the former of said levers bearing normally upon the roller e the
spring 5, secured to said shell, bearing by its ends upon the ends of the said levers,
and the magazine obliquely attached to the shell, provided with an opening 25, and a
spring-closing device 17, as and for the purpose set forth.
Dated this 30th day of August 1890.
F. W. BARKER,
Applicant's Agent.