Improvements in Cartridges for Quick-firing and other Guns.
Year: 1889

page_text: Date of Application, 30th Dec., 1889
Complete Specification Left, 26th Sept., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Cartridges for Quick-firing and other Guns.
I, JOHANNES CATHARINUS BULL, of The Yews, Belvedere, in the County of Kent,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to the method of fixing the tube (which forms the body of
the cartridge) to the base.
I make the tube conical or otherwise smaller at its rear than in front and fit the
end into a corresponding recess in the base so that the parts cannot be separated without
deforming the tube.
The base proper consists of a cup the inside of which receives the end of the tube
and having at the centre a screw threaded boss. Upon this boss I screw a nut
of such shape that it just fits inside the tube so that when it is screwed home
against the base it firmly clips the end of the tube between it and the sides of
the cup.
If the cup is made of sufficiently ductile metal the screw nut may be dispensed
with the central boss being spread outwards by pressure after the tube is in place.
If the rear end of the tube is sufficiently strong the cup may be dispensed with the
tube being secured to the base by the screw nut or boss inside it.
Dated this 30th day of December 1889.
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Cartridges for Quick-firing and other Guns.
I, JOHANNES CATHARINUS BULL, of The Yews, Belvedere, in the County of Kent,
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 the method of fixing the tube which forms the body of
the cartridge to the base.
I make the tube conical or otherwise smaller at its rear than in front and fit the
end into a corresponding recess in the base so that the parts cannot be separated without
deforming the tube.
The base proper consists of a cup the inside of which receives the end of the tube
and it has at the centre a screw threaded boss. Upon this boss I screw a nut
of such shape that it just fits inside the tube so that when it is screwed home
against the base it firmly clips the end of the tube between it and the sides of
the cup.
If the cup is made of sufficiently ductile metal the screw nut may be dispensed
with the central boss being spread outwards by pressure after the tube is in place.
If the rear end of the tube is sufficiently strong the cup may be dispensed with
the tube being secured to the base by the boss inside it.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.

page_text: chamber, c is a nut screwed tightly on to the boss; at its circumference it is shaped
to conform to the interior of the coned end of the body tube which it nips firmly to
the base. To allow it to enter the tube a it has flats upon it on two opposite sides.
Figure 2 shows a cartridge case in which the screwed boss which is marked c¹ is
upon the part e and screws into the base b.
Figure 3 shows another cartridge case where the metal of which the base is made
being sufficiently ductile the nut is dispensed with. The base is originally made
'with a central boss to the form indicated by dotted lines and this boss is afterwards
closed down as the full lines show so as to nip and hold the body tube a.
Figure 4 shows a cartridge case in which the body tube where it meets the base is
sufficiently strong not to require external support and the base 6 consequently is not
cupped to receive it as in the other examples; in other respects this cartridge
case is similar to that shown by Figure 3. The cupping of the base may also
be dispensed with when the body tube is secured in the manner indicated in
Figures 1 and 2.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1. A cartridge case in which a coned or tapered body tube a is inserted into a
cupped base band is secured by a nut or screw piece c which nips it against the cupped
base 6 substantially as described in respect to Figures 1 and 2.
2. A cartridge case in which a coned or tapered body tube a is inserted into a
cupped base 6 and is secured by spreading a boss upon the base so as to nip the
body tube against the interior of the cup in the base 6 substantially as described in
respect to Figure 3.
3. A cartridge case in which a body tube a with a thickened and coned or tapered
end is applied to a base piece of ductile metal b having a boss which is then
spread and made to fill the lower end of the body tube substantially as described in
respect to Figure 4.
Dated this 24th day of September 1890.
JOHANNES CATHARINUS BULL.