Year: 1899

page_text: Date of Application, 25th Mar., 1899
Complete Specification Left, 24th Oct., 1899-Accepted, 24th Mar., 1900
I, HERBERT JOHN BLANCH, Gunmaker, of 29, Gracechurch Street, London, E.C.,
do hereby declare the nature of this invention to be as follows:-
The object of this invention is the production of a new & improved waterproof
cartridge, such as may be used in shot guns, in which the edge of case is turned
over & inwards to hold a wad or stopper.
In carrying out my invention I use a metal case of sufficient length to carry
the charge & to receive a wad or stopper, this closing device or stopper consists
preferably of a metal disc with a beaded edge, over which the edge of case is
closed or contracted. This metallic wad or stopper may advantageously have
the form of an inverted box lid, that is to say, instead of fitting outside, the lid
is inverted & placed inside the case, so that the edges of the lid & the edges of
the case can be contracted inwards together, so as to form a beaded edge &
thereby make a close fitting joint.
The edges of the stopper may project above the edges of the case so that when
both are turned in, the rounded edge may be formed partly by the edge of
stopper & for a portion of the curve only by the inturned edge of the cartridge
case.
Alternatively a pulp or other suitable stopper may be used, consisting of a
disc with an upturned edge or ring preferably having a semi-circular section,
which ring may be formed seperately from the disc if more convenient, so that
the disc may be of one material & the ring of another.
The object of the ring being to act as a former or guide for turning the
metal edge of cartridge in upon & ensuring the even & correct opening of the
case when fired.
1
P
1 1000
I, HERBERT JOHN BLANCH, of 29, Gracechurch Street, in the City of London,
Gunmaker, 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 improvements in waterproof cartridges such as are
used in shot guns.
According to the invention I construct the improved cartridge of a metal

page_text: case of proper length for receiving the charge and a wad or stopper; the wad or
stopper which I use comprises a metal disc having a beaded edge, the said
disc being adapted to be inserted in the mouth of the metal case with the bead
outermost so that the end of the case can be turned over on the edge of the
bead thereby making a close fitting joint.
The edge of the stopper may project above the edge of the case so that when
both are turned in, the rounded edge may be formed partly by the edge of the
stopper and partly by the inturned edge of the cartridge case.
5
I sometimes make the wad or stopper of paper pulp or other similar suitable
material; in this case the said wad is advantageously made of a disc of the 1
material formed with a doubly bent projecting edge upon which the edge of the
cartridge case is turned in.
To enable the invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is a sectional elevation drawn to an exaggerated scale of a cartridge 1
case and metal wad constructed according to the invention:
Figure 2 is a vertical section of my metal wad or stopper:
Figure 3 is a view similar to Figure 1 of the cartridge case without the
wad; and
Figure 4 is a vertical section of the end of a cartridge case having a wad 2
or stopper of paper pulp or other similar suitable material.
a is the cartridge case which is made of sufficient length as above described
and a is a paper lining; this paper lining a is preferably tapered or chamfered
at the end of the case a which receives the wad 6 to ensure that the metal edge
alone of the case grips the wad. In the construction shewn in Figures 1, 22
and 3 the wad is formed of a metal disc having its edge bent upwards and
inwards to provide a rounded bead as shewn at 6 in Figures 1 and 2; this
wad is inserted into the mouth of the cartridge case shewn in Figure 3 and
the said end is turned over on to the bead 1 as shewn in Figure 1.
Figure 4 shews a cartridge case having a wad of paper pulp or other similar
suitable material. The said wad consists of a disc 6 having its edge turned
up as shewn at 6 and then down as shewn at 63 thereby forming the rounded
bead upon which the metal edge of the case a is turned in. The double bend b², 3³
at the edge of the disc b provides the necessary stiffness where required.
Instead of making the wads or stoppers as hereinbefore described I can employ
a stopper consisting of a disc of suitable material having upon its face a ring
preferably semi-circular in cross section; this ring may be formed integral
with, or separately from, the disc in which latter case the disc may be of one
material and the ring of another.
Although I have shewn a cartridge case provided with a paper lining it will
be obvious that the invention is also applicable to cartridges having a metal
case without such paper lining.
Wads constructed and fitted to cartridges as hereinbefore described are sufficient
to keep the cartridge efficiently closed until it is fired and also to offer sufficient
resistance to enable the proper combustion of the powder to take place; further-
more on firing the wad properly opens the turned over portion of the case without
its being necessary to open the beading of the wad. This method of stoppering
also provides a convenient finish to the mouth of the case for handling and
enables a full length metal cartridge case to be used without the disadvantages
hitherto attached to such cases, namely, the sharp and inconvenient finish at
the mouth, or the exposed portion of paper which by becoming damp swells and
may jam in the cartridge chamber on loading or ejecting.
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. In a cartridge the combination of a metal case with or without an internal

page_text: paper lining and a wad or stopper comprising a disc having a beaded edge on
to which the edge of the metal case can be turned in, substantially as hereinbefore
described.
2. In a cartridge the combination of a metal case having an internal paper
lining chamfered or tapered at the mouth and of a wad or stopper comprising
a disc with a beaded edge on to which the edge of the case can be turned in,
substantially as hereinbefore described.
3. In a cartridge the employment of a wad or stopper comprising a disc of
metal the edge of which is turned upwards and inwards so as to form a rounded
bead, substantially as hereinbefore described and illustrated.
4. In a cartridge the employment of a wad or stopper comprising a disc of
paper pulp or other similar suitable material having its edge bent upwards
and downwards so as to form a rounded head, substantially as hereinbefore
described and illustrated.
5. In a cartridge the employment of a wad or stopper comprising a disc having
a ring upon its outer face, such ring being formed integral with or separate
from the said disc, substantially as hereinbefore described.
6. Cartridges manufactured substantially as hereinbefore described and illus-
trated respectively in Figures 1, 2 and 3 and 4 of the accompanying drawing.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.