IMPROVEMENTS IN CARTRIDGES
Year: 1882

page_text: "
LETTERS PATENT to Frank Wirth, of the. firm of Wirth and Company
Patent Solicitors, at Frankfort on the Main, in the Empire of Germany for
an invention of IMPROVEMENTS IN CARTRIDGES A communication from the
firm of "Pulverfabrik Rottweil-Hamburg at Rottweil, in the Empire of
Germany.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office of
the Commissioners of Patents on the 7th July 1882.
FRANK WIRTH of the firm of Wirth and Company, Patent Solicitors at
Frankfort on the Main, in the Empire of Germany "IMPROVEMENTS IN
CARTRIDGES A Communication from the Firm of " Pulverfabrik Rottweil
Hamburgh" at Rottweil, in the empire of Germany
"
The said invention relates to metal gun cartridges containing small shot, and it is
designed to provide a firm and water tight covering or "wad" to hold the shot in
position
Several serious disadvantages attach to the present system of closing metal
cartridges. The "wad" is liable to become so loose that the shot fall out, or become
loosened, resulting in either a total want of effect when the gun is fired, or in
irregular hitting and decrease of piercing power. Further the cartridges are not
reliably waterproof. To obviate these disadvantages a disc of thin cardboard is
placed immediately over the shot, and the cartridge is further closed by a thin disc
of brass, which is held in position by longitudinal ribs embossed in the walls of the
cartridge
In order to make the closure more perfectly watertight, the minute space
between the disc and the walls of the cartridge, as also the surface of the disc and
the said walls may be coated with shellac or other suitable varnish.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frank Wirth in the Great Seal Patent Office on the 6th
January 1883.
-
IN
FRANK WIRTH, of the firm of Wirth and Company, Patent Solicitors,
at Frankfort-on-the-Main, in the Empire of Germany IMPROVEMENTS
CARTRIDGES. A Communication from the firm of Pulverfabrik
Hamburg at Rottweil in the Empire of. Germany..
Rottweil
The said invention relates to metal gun cartridges containing small shot, and it
is designed to provide a firm and water tight covering or "wad" to hold the shot
in position.
In order that the said invention may be the better understood I now proceed to
describe the same with relation to the drawings hereunto annexed, in which like
letters of reference refer to like parts throughout the figures.
Figure 1 is a perspective view of the improved cartridge with the casing partially
removed
Figure 2 is a horizontal section..
Several serious disadvantages attach to the present system of closing metal
cartridges. The wad is liable to become so loose that the shot fall out, or become
loosened, resulting in either a total want of effect when the gun is fired, or in
irregular hitting and decrease of piercing power. Further the cartridges are not
reliably waterproof
To obviate these disadvantages a disc of thin cardboard, b, is placed immediately
over the shot, and the cartridge is further closed by a thin disc of brass, a, which is
held in position by longitudinal ribs, c, embossed in the walls of the cartridge
In order to make the closure more perfectly water-tight, the minute space
between the disc and the walls of the cartridge, as also the surface of the disc and
the said walls, may be coated with shellac or other suitable material.
Having now fully described and ascertained the nature and objects of the said
invention, be it known that what I consider novel and desire to protect by Letters
Patent is:
The Combination with an ordinary metal walled cartridge case of a closing disc
of cardboard and a second disc of metal, held in position by longitudinal embossed
riba, the whole being optionally waterproofed by a coating of shellac or other
suitable material, substantially as and for the purposes specified.
In witness whereof I the said Frank Wirth have hereunto set my hand and
seal this third day of January in the year of our Lord. One thousand
eight hundred and eighty-three.