Improvements in Cartridges.
Year: 1899

page_text: Date of Application, 4th Oct., 1899-Accepted, 17th Feb., 1900
Improvements in Cartridges.
I, JOHN L. BREWER, of No. 216, West. 24th Street, in the City, County and
State of New York, United States of America, Gentleman, 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: -
My invention relates to improvements in cartridges and has for its object
to reduce recoil, to economise powder, to reduce fouling of the gun, to increase
the velocity of the projectile and to decrease the cost of manufacture.
According to my invention I insert in the base of the cartridge, a hollow
perforated cone of metal, paper or other suitable material, in such manner that
the apex of the cone is situated immediately over the percussion cap or detonator.
The base of this perforated cone is of such circumference as to closely fit the
cartridge case or shell, and it is provided with flanges or tongues which fit
between the cartridge case or shell and an internal lining at the base of said
shell or case, and hold the perforated cone in position. The base of the
cartridge is filled to within a short distance of the said cone with paper or
other suitable material. This filling conforms to the shape of the cone, and a
chamber or space is thus formed between the cone and the filling, with which
space the cap communicates.
In order that my invention may be clearly understood and readily carried into
effect I will proceed to describe the same more fully with reference to the accom-
panying drawings in which:-
Figure 1 shows the perforated hollow cone and
Figure 2 is a side view partly in section, of a cartridge constructed according
to my invention.
A is the shell or case of the cartridge. B is the perforated cone provided
with flanges or tongues bb. is the internal lining in the base of the shell or
case A. The tongues bb fit between the shell A and the lining a, and retain
the cone in the position shown. C is the paper or other suitable filling in the
base of the cartridge. D is the space or chamber betwen the filling C and the
perforated cone B. E is the percussion cap which communicates with the
space D).
A, is the upper part of the cartridge case or shell containing the
powder which fills the cone B and is supported thereby.
When the cap E is exploded, the flame caused by the explosion impinges on
the apex of the cone B, spreads into the chamber D, and is distributed over
the surface of the perforated cone B. A considerable surface of the powder is
thus simultaneously exposed to the said flame through the perforations in the
The powder is thereby rapidly ignited and completely converted into
gas, breech pressure is reduced and the velocity of the projectile is consequently
increased, and there is less liability of fouling or of the collection of unburned
powder or residue in the gun.
cone.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:--
1 I coutvideo wrovided with a hollow norfanated care for the
1

page_text: 2. A cartridge having its base provided with a conically recessed filling
arranged around the percussion cap or detonator, substantially as and for the
purpose specified.
3. A cartridge constructed substantially as described with reference to the
accompanying drawings for the purpose specified.
1
P
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.