Improvements in Cartridge Cases.
Year: 1898

page_text: Date of Application, 17th Jan., 1898-Accepted, 5th Mar., 1898
Improvements in Cartridge Cases.
I, PAUL MAUSER, Royal Councillor of Commerce, of Oberndorf on the Neckar,
in the Empire of Germany, do hereby declare the nature of this invention and in
what manner the same is to performed to be particularly described and ascertained
in and by the following statement:—
This invention relates to metallic cartridges for use especially in arms of small
bore, the characteristic feature being a ring of aluminium or other suitable metal,
which is inserted in the front of the cylindrical or slightly conical cartridge-casing
and which retains the projectile in position. The bore of this ring widens towards
the rear and forms a conical opening which joins the inner wall of the cylindrical
casing, while the front of the ring forms a conical abutting surface adapted to rest
against a correspondingly shaped surface provided in the interior of the breech.
The accompanying drawing represents a cartridge constructed according to my
invention drawn to an enlarged scale.
a indicates the cylindrical metallic casing having a ring e inserted at its front,
the connection between the parts a and c being advantageously effected by forming
an annular groove around the same. The bore of the ring widens towards the
rear thereby forming a gradual incline which finally joins the inner wall of the
casing a and which allows as far as possible free passage to the propelling gases
from the casing a on the explosion of the charge. There results from this an in-
crease in the life of the arm and greater security to the shooter by a substantially
reduced gas pressure in the interior of the cartridge-casing. The conical front
parte of the ring e surrounding the projectile f forms a fairly steep abutting sur-
face against the breech and is thus the means for firmly lodging the cartridges
especially those known as rimless cartridges. The front portion of the casing
as far as it encloses the ring c is advantageously made slightly conical being
smaller at the mouth and thus renders its extraction from the breech-more easy
and prevents jamming.
In addition to the advantages already mentioned it may be stated that another
essential advantage is gained by dispensing with the formation of the reduced neck
of the cartridge especially with respect to small-bore arms, and further by the
proper choice of dimensions for the ring c. An easy regulation of the explosion
chamber is possible without alteration of the exterior form of the cartridges while
finally in recoil loaders better results are obtained regarding the action of the
propelling gases.
The improved cartridge is also suitable for use in quick firing machine guns on
the ground that the tearing off of the end of the cartridge case is altogether pre-
cluded when extracting the cartridge.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
1. A metallic cartridge having a metallic ring c fixed in the front part of the
or slightly conical casing a such ring serving to hold the projectile
erlindrical

page_text: and having its bore wider towards the rear where it joins the inner wall of the
casing a, whilst the front portion of said ring forms a conical abutting surface
adapted to rest against a correspondingly shaped surface in the breech of the arm
substantially as herein set forth and as illustrated in the accompanying drawings.
2. The improved metallic cartridge substantially as herein set forth and as
represented in the accompanying drawings.
Dated January 12th 1898
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.