An Improved Nail-driving Apparatus.
Year: 1893

page_text: COMPLETE SPECIFICATION.
An Improved Nail-driving Apparatus.
I, JOHANN LEONHARDT KORNDER, of 6 Ausbacherstrasse, Uffenheim, Bavaria,
in the Empire of Germany, Boot and Shoe Manufacturer, 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, reference
being had to the accompanying drawings and to the figures and letters marked
thereon:-
The present invention has for its object an improved nail-driving apparatus, which
is intended to drive nails, of various sizes, home, and is adapted to be used especially
in places difficult of access.
It is anticipated that when once introduced, it will become an almost indispensable
tool for many workmen and manufacturers. In addition to the apparatus being
constructed in such manner as to allow of its being used in places difficult of access,
it can be elongated by means of additional screwed parts so that it can be used also
at more or less great distances.
In the accompanying drawings
Figure 1 is a side view of my improved nail-driving apparatus showing the parts
in the position they would assume preparatory to the driving of a nail.
Figure 2 is a similar view but showing the parts in the position they would
assume when a nail has been driven home.
Figure 3 is a side view of the driving mandrel and
Figure 4 is a cross section of the nail driver drawn on the line - Figure 1.
The nail-driving apparatus consists of a cylindrical tube d, which, at the end d',
is strengthened on the outside and made conical and provided with spring gripping
tongues a eh hereinafter described. The other end of the tube d is provided with
a loosely fitting mandrel or driving plunger f having a strong rounded head f',
while the other end, at f Figure 3, is provided with a recess for the reception of
the head of the nail to be driven. At Figure 4 it will be seen that the conical
part of the tube d has open slots in opposite sides thereof. These two slots are
intended to give passage to the parts a of a pair of spring grippers. The fulcra h
for the gripper arms a are fixed in the conical part d' of the tube d.
In order to drive a nail the latter is first inserted into the mouth of the grippers,
after having previously pressed the springs e of the arms a together so as to open
the said mouth of the grippers. The nail to be inserted is introduced head first into
the said mouth, while the point is allowed to stand out beyond the same; then, by
releasing the arms a, the nail is gripped tightly by the grippers through the action
of the springs e. The next operation is to insert the plunger finto the tube d; the
nail held in-the-apparatus is then put in its desired position, after which the plunger f
is driven further into the tube d by means of a hammer, thereby causing the nail to
be driven home. As the plunger passes further into the tube, it passes between the
two parts of the mouth of the grippers, which thereby open, but as the nail is by
now already partly driven into the material, it requires no longer to be held. By
the addition of extra lengths of tube d and driving mandrelf screwed together, the
nail driver may be made of any desired length.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A nail-driving apparatus comprising a pair of spring nail grippers, a tube to
which such grippers are pivotted, and a driver or plunger working in such tube so
that when the plunger is driven by a hammer the grippers are caused to open and

page_text: thereby release the nail after the latter has to some extent penetrated the material
into which it is to be driven, substantially as herein shown and described.
2. The peculiar combination and arrangement of parts substantially as herein
shown and described.
Dated this 10th of A 1000
JOHANN LEONHARDT KORNDER,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.