AN IMPROVEMENT IN CASE PROJECTILES
Year: 1885

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I, OLIVER IMRAY of No 28 Southampton Buildings, Chancery Lane in the
county of Middlesex, Fellow of the Institute of Patent Agents, do hereby declare
the nature of my invention for "AN IMPROVEMENT IN CASE PROJECTILES and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
Ordinary case projectiles consist essentially of a shell or outer case of metal or of
a metallic compound such as copper, iron, steel, bronze, brass, etc, which is filled
with a core of lead or of some alloy or compound of lead or other suitable metals.
The shells or cases can be made in one piece or in several pieces which may be of
different metals. In the firing of these projectiles and in striking against the object
aimed at they are intended to act as if they were made of only one piece, and it
is particularly desirable that the core shall not become separated from the case nor
advance within it tending to burst it. In this respect ordinary case-projectiles are
defective the metallic core not being firmly secured to the case but only pressed or
melted into it.
By connecting the core to the case according to this invention by mechanical
fixing instead of soldering in the usual way, the construction is rendered much
simpler and cheaper and the projectile is more durable in store and capable of
resisting moisture and other destructive influences.
For this purpose the inner surface of the case as shewn in figs. and 2 of the
accompanying drawings is roughened or is made with annular grooves a or with
studs or pins projecting inwards, or it is inwardly screw threaded, so that the core
which may be melted and poured into the case or may be pressed into it or first
poured in and then pressed, or may be screwed or otherwise introduced into the
case, is firmly retained in the latter and cannot advance alone when striking an
object. This method of fixing together the case and core can be applied to
projectiles generally of any diameter, the materials, sizes, and the proportions
of the several parts being suitably adjusted. Such projectiles are particularly
suitable for small arms and mettrailleurs and generally for small bore guns.

page_text: The projectiles constructed as described have great penetrative power even into
hard objects, such as the stronger bones of men or animals, because in consequence
of the firm connection of the core to the case when the projectile strikes and its
velocity is very rapidly annihilated the core cannot advance within the case so as
to burst it. If the core could advance within the case it would be liable to become
enlarged and split into a more or less great number of fragments, which together
with the fragments of the case, would probably cause horrible and for the most
part incurable wounds. A projectile constructed as above described as compared
with the ordinary case projectiles, acts, when striking against and penetrating
a hard and solid object as if it consisted of only one piece; it retains better its
original form, and is advantageous not only on account of its greater penetrative
power but also on humane grounds as the wounds caused by such projectiles are
less horrible and more easily curable than those made by ordinary case-projectiles.
The above described method of connecting together the case and core can be
employed not only in projectiles of expansion kind, which in consequence of
softness of their material are expanded by the discharge to take the grooving and
in projectiles of conical form which are guided in the grooves by a reinforcement of
the case, at the rear-but this construction can also be applied to rigid projectiles
having guiding collars on the outer surface of the case as indicated in fig. 2.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what
I claim is
In case projectiles connecting the case with the core by mechanical means,
substantially as herein described, so as to make the core and case act as a single
piece for the purpose of increasing the penetrative power and of preventing
upsetting bursting or separation of the two parts from each other.
ARTO STU NORT
ust LOOD.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings, 3
London, W.C.