Improvements in and Means for Measuring the Penetrative Force of Shots.
Year: 1893

page_text: Date of Application, 13th July, 1893-Accepted, 2nd Sept., 1893
COMPLETE SPECIFICATION.
Improvements in and Means for Measuring the Penetrative Force
of Shots.
A communication by EMIL MÜLLER, of the Rheinisch-Westfälischen, Sprengstoff-
Actien-Gesellschaft, of Cologne on the Rhine, in the Empire of Germany,
Managing Director.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, and 323, High Holborn, in the County of Middlesex,
Civil 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 measuring the penetrative force of shots by means of
the resistance of water.
On the accompanying sheet of drawings-
Figure 1 shows a vertical longitudinal section,
Figure 2 a horizontal section, and
Figure 3 an end view of the apparatus or means employed for this purpose,
which apparatus is constructed in the following manner-
9
a is a longitudinal box or receptacle, the front side of which has an opening d,
Figure 3, against which a thick gelatine plate k is pressed by means of winged
screws, and a protecting disc m suitably cut out and provided with rivetted angle
or elbow pieces_w. The wooden frame 1, enclosed by two wooden plates o and p,
which contains the gelatine plate k rests against an india rubber disc which rests
on the wrought iron frame rivetted on the box a. By tightening the winged
screws, the frame may thus be pressed perfectly tight against the box a.
The
front surface of this side of the box a is provided with a felt covering s. The
box a has also a perforated bottom e divided into compartments, and also having
cross divisions. The cock serves for letting off the water with which the box a is
filled up during use.
し
For making the gelatine plate k, the wooden frame 1, which is provided with
openings u u, has cotton fabric stretched across it on both sides, and a boiling hot
solution of gluey material in water is poured thereon. Any animal or vegetable
glue material which swells in water such as gristle and bone glue, fish glue,
isinglass, agger and other like substance may be employed as gelatinous bodies
for preventing the water escaping. After the gelatine has cooled and solidified,
the wood frame containing the gelatine plate is inserted in the box a and is
pressed against it in the manner herein before described and so that the box will
be watertight.
The apparatus can then be made use of in the following manner-
The box a is filled up with water and the shot discharged against the opening d
of the front side of the box which is the side which is provided with the gelatine
plate k. The shots penetrate without finding any appreciable resistance the thin
cotton fabric and also the gelatine plate and sink down onto the bottom e which is
divided into compartments, being evenly and gradually checked in their course by
the resistance of the water. By drawing out the separating bottom c it can be
easily ascertained how far the separate shots have travelled in the water. In the
case also of small shot, it may be exactly ascertained how many pellets are
deposited in the several compartments, and thus the effect of the discharge of small
shot may be exactly determined.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is-.
1. Measuring the penetrative force of shot or bullets by means of the resistance
of water, and in such way that the shot when fired penetrates before it enters
the water a layer of gelatine, which prevents the escape of the water from the
resulting slot holes.
2. An apparatus or means for measuring the penetrative force of shots in the
manner specified in Claim consisting of a box provided with a longitudinal
perforated bottom divided into compartments, the front side of such box having
a plate of gelatine which is suitably pressed against the front end of the box in
such a way as to be watertight.
Doted this 19th dor of July 1893
WM. P. THOMPSON & Co.,
Agents for the Applicant.