Improvements in Compound Buшlets for small Arms.
Year: 1897

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 17th day of October 1898.
Date of Application, 31st July, 1897
Complete Specification Left, 29th Apr., 1898-Accepted, 4th June, 1898
Improvements in Compound Buшlets for small Arms.
1, NEVILLE SNEYD BERTIE-CLAY, Captain in the Royal Artillery, of The Army and
Navy Club, Pall Mall, in the County of London, do hereby declare the nature of
this invention to be as follows:-
This invention relates to the class of compound bullets composed of a
hard metal case or envelope, open at the point or head, and filled with a core of
soft metal.
In order to remedy the disadvantages attendant on the use of bullets of this class,
it is now proposed to draw the case or envelope, as usual, from a shell of hard metal ;
then to pierce the closed end which is to form the head of the bullet, till the case
with a core of lead or other soft metal, and turn over the edge of the case, thereby
forming a partially open base, and leaving the core of soft metal open to the direct
action of the propelling gases.
The case may be impressed, near its base, with an annular groove, and from this
point to the extremity of the case, it is proposed to give the bullet a slight
taper.
The advantages claimed for this compound bullet are, that the core, at the
moment of impact of the bullet, will, under the propulsive pressure of the discharge,
externally of the envelope or case, exude sufficiently to form a mushroom head of
a diameter materially larger than the case, and thus ensure an incision of a diameter
equal to bullets of a much larger gauge.
A further advantage claimed for this bullet is, that the coned or tapered end
relieves the barrel of much unnecessary strain, and consequently increases the life of
the rifle.
Improvements in Compound Bullets for Small Arms.
I, NEVILLE SNEYD BERTIE-CLAY, Captain in the Royal Artillery, of the Army and
Navy Club, Pall Mall, in the County of London, 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 the class of compound bullets composed of a hard metal

page_text: case
or envelope, open at the point or head, and filled with a core of soft
metal.
In order to remedy the disadvantages attendant on the use of bullets of this class,
it is now proposed to draw the case or envelope, as usual, from a shell of hard
metal;
then to pierce the closed end which is to form the base of the bullet; fill
the case with a core of lead or other soft metal; and, in coning the head, as usual,
to turn over the edge of the case.
The case may be impressed, near its base, with an annular groove, and from
this point to the base extremity of the case, the case will receive a slight
taper.
In the accompanying drawing,
Fig. 1 shows, in side view, my improved compound bullet.
Fig. 2 is a central longitudinal section of the same; and
Figs. 3 and 4 are plan views of the opposite ends of the bullet.
Fig. 5 is a side view of the core of soft metal; and
Fig. 6 shows this core inserted in the unfinished case, which is ready to undergo
the operation of coning the head and the base, by which means the core is
compelled to fill the case flush at its opposite ends, as indicated at the section,
Fig. 2.
When the case is drawn in the usual manner, the closed end is flattened and
pierced, to expose the rear end of the inserted core to view. The head of the case
is then tapered and finished by a reamer, and pressed tightly on the soft metal core,
thus coning the head of the compound bullet, and thinning the case at its open end.
The part of the case between the dotted lines 1 and 2, Fig. 1, is left cylindrical,
and, below the line 2, I may introduce an annular indent, for more effectually binding
case and core together; and below this, I slightly cone the case, that it may move
free, or nearly free, of the rifled barrel.
The advantages claimed for this compound bullet are, first, that the core, at the
moment of impact of the bullet, will, under the propulsive pressure of the discharge,
externally of the envelope or case, exude sufficiently to form a mushroom head, as
illustrated at Fig. 7, which represents the appearance the bullet will take, when
fired at a partially yielding substance; the thinning of the head of the case facilitates
its disruption under the impact, and thus allows of the soft metal core spreading to a
diameter materially larger than the case, by which means an incision of a diameter
equal to bullets of a much large gauge is ensured.
Secondly, that the coned or tapered base end relieves the barrel of much
unnecessary strain, and consequently increases the life of the rifle.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I am aware of Letters
Patent No. 902 A.D. 1889 and No. 22173 A.D. 1891 granted to Major-General
Michael Tweedie and I claim nothing described or claimed in the Specifications of
Buch Letters Patent, and I declare that what I claim is :-
The construction of compound bullet as described with reference to the drawing,
whereby the advantages above set forth are attained..
Dated this 90th don of Anul 1900
NEWTON & SON,
Agents for the Applicant.