Improvements connected with Screw-nails, Hooks, Spikes, and the like.
Year: 1890

page_text: Date of Application, 28th Oct., 1890-Accepted, 29th Nov., 1890
COMPLETE
SPECIFICATION.
Improvements connected with Screw-nails, Hooks, Spikes, and
the like.
I, JULIUS FLORSCH, Manufacturer, of Friedrichshutte, in the Kingdom of Prussia
and German Empire, 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 has reference to screw-nails, hooks, spikes, and the like.
In order to fix nails, hooks, spikes and the like in walls of stone, brick, cement,
or like material, it is necessary to find cracks or joints or to first make holes in
the wall and provide wooden plugs. The walls often get spoiled or marked, and
their ornamentation, such as papering or painting, injured when fixing such nails.
The present invention is designed to overcome the above objections, and to do
away with the necessity of knocking or hammering when fixing nails.
The following is a description of the invention, reference being had to the
accompanying drawings and to the letters of reference marked thereon.
According to the invention the shank of the screw-nail, hook, spike, or the like
consists of a hollow shank or shell a (see Figure 1) made of steel or other suitable
material. The shell a tapers off somewhat conically towards the end and is provided
longitudinally with a slot g as shewn in Figure 1, and in the cross sections a¹¹, c¹,
Figure 3. By reason of this slot the hollow shank a is somewhat springy or elastic,
which permits an easier entry into the stone or material of the wall. At the front
end the hollow shank is provided with teeth or cutters b, and at the back end-in
the case of a screw-nail-with a groove or incision c, into which a screw-driver or
other screwing tool d fits. The tapering part of the shank a is provided with a screw
thread which facilitates the entry and fixing of the screw-nail. The front cutting
edge serves to cut out the hole for the entry of the screw-nail, and the edge of the
slot 9 serves to cut out the hole and give it a conical shape. The stone dust or
cuttings passes out and falls through the slot g. To prevent the stone dust or cuttings
from clogging when boring, the shark is turned several times in and out in order to
get rid of the superfluous dust or cuttings and to get a better bite and so that the
screw-nail will hold firmly.
A screw-nail made as above described and fixed into stone or the like in the
manner set forth will bear and hold heavy weights.
The screw-nail may be provided with a head k fixed by screwing to the end of the
springy shank a as shewn in Figure 5 or it may have a turned up end to act as
a hook or otherwise.
A screw-nail or the like according to this invention can be fixed in a wall without
knocking and can be removed therefrom without causing any injury, and it stands
much greater pressure or pulling than an ordinary driven nail would.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :—
1. A screw-nail or like device for masonry or like material, comprising a hollow
springy shank a having a slot g and a screw thread f, and tapering towards the
front, and having its inner end provided with teeth or cutters band its outer end
with a slot or means for applying a screw driving tool, and means for attaching a
head k or a hook or other like device.

page_text: 2. The screw-nail or like device herein described and set forth with reference to
the drawings hereto annexed.
Dated this 27th day of October 1890.
15,
CHEESBROUGH & ROYSTON,
Water Street, Liverpool, Applicant's Patent Agents.