Improvements in Cartridge Cases Made of Metal of Small Resisting Force.
Year: 1894

page_text: Date of Application, 12th Apr., 1894.
Complete Specification Left, 27th Nov., 1894-Accepted, 29th Dec., 1.94
'PROVISIONAL SPECIFICATION.
Improvements in Cartridge Cases Made of Metal of Small Resisting
Force.
I, EUGEN POLTE, of Magdeburg, Prussia, Manufacturer, do hereby declare the
nature of this invention to be as follows:—
The application of metals of small resisting force, say of aluminium (valuable on
account of its small weight) for manufacturing cartridge cases renders it necessary
to strengthen the same at several parts for enabling them to resist the high
pressures of the explosives; this strengthening is effected by the use of inner or
outer casings made of a material having a greater resisting force, such as steel,
brass, steel plate, plated with nickel copper and the like.
This strengthening is in particular necessary for the bottom parts and for the
parts serving to receive the cap as these parts are not sufficiently supported owing
to the absence of continuity of the breech part of the barrel, due to the breech
closure and the extractor mechanism.
The application of these strengthenings is effected either by striking up the
metal and pressing it on or into the body of the case or by other means.
The Figures 1 to 6 of the accompanying drawings show by way of example
several forms of the outer and inner strengthening casings for cartridge cases with
rim with groove and for firing by means of copper caps or fuzes.
In the construction shown in the Figures 1 and 2 the strengthening consists of
an exterior casing M surrounding the base of the cartridge case.
In the construction illustrated in the Figures 3 and 4 a box M' is inserted for
strengthening the cap or fuze chamber; the said box M' may be modified according
to the shape of the cap or fuze.
In Figure 5 the casing M and the inserted box M' are applied together, while in
Figure 6 these two parts are combined with each other so as to form an outer and
inner strengthening M M' consisting of one piece.
The construction of cartridge cases above described and shown in the drawings
offers at present the only means of utilizing the excellent property of the light
weight of metals, such as aluminium, for military and other cartridges.
Dated this 12th day of April 1894.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Cartridge Cases Made of Metal of Small Resisting
Force.
I, EUGEN POLTE, of Magdeburg, Prussia, Manufacturer, 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 :-
The application of metals of small resisting force, say of aluminium (valuable on
account of its small weight) for manufacturing cartridge. cases renders it necessary
Price &d l

page_text: to strengthen the same at several parts for enabling them to resist the high
pressures of the explosives; this strengthening is effected by the use of inner or
outer casings made of a material having a greater resisting force, such as steel,
brass, steel plate, plated with nickel, copper, and the like.
This strengthening is in particular necessary for the bottom parts and for the
parts serving to receive the cap as these parts are not sufficiently supported owing
to the absence of continuity of the breech part of the barrel, due to the breech
closure and the extractor mechanism.
The
The application of these strengthenings is effected either by striking up the
metal and pressing it on, or into, the body of the case or by other means.
Figures 1 to 6 of the drawings accompanying my Provisional Specification, shew
by way of example several forms of the outer and inner strengthening casings
for cartridge cases with rim with groove and for firing by means of copper caps or
fuzes.
In the construction shewn in the Figures 1 and 2 the strengthening consists
of an exterior casing M surrounding the base of the cartridge case of aluminium or
other metal of small resisting power.
In the construction illustrated in the Figures 3 and 4 a box M' is inserted for
strengthening the cap or fuze chamber; the said box M' may be mcdified according
to the shape of the
cap or fuze.
In Figure 5 the casing M and the inserted box M' are applied together, while in
Figure 6 these two parts are combined with each other so as to form an outer aud
inner strengthening M M' consisting of one piece.
The construction of cartridge cases above described and shewn in the drawings
offers at present the only means of utilizing the excellent property of the light
weight of metals, such as aluminium, for military and other cartridges.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. Cartridge cases made of metals having small resisting power such as aluminium,
the bottom parts of which are strengthened by a casing M made of a material
having a greater resisting power, such as steel, brass and the like, substantially as
described with reference to Figures 1 and 2 of the drawings.
2. Cartridge cases made of metals having small resisting force such as aluminium,
the parts of which that serve to receive the cap or fuze are strengthened by a
box M made of a material of greater resisting force such as steel, brass and the
like, substantially as described with reference to Figures 3 and 4 of the drawings.
3. Cartridge cases made of metals having small resisting force, such as aluminium
the bottom parts of which are provided with both the strengthenings referred to in
Claims 1 and 2 whether applied as separate bodies such as shewn, for instance, in
Figure 5, or consisting of one piece such as shewn, for instance in Figure 6
substantially as described.
Dated this 27th day of November 1894.
ABEL & IMRAY,
Agents for the Applicant.