An Improvement in Projectiles for Fire-arms.
Year: 1889

page_text: Date of Application, 9th Sept., 1889
Complete Specification Left, 27th May, 1890-Accepted, 28th June, 1890
An Improvement in Projectiles for Fire-arms.
I, RICHARD WALTERSKIRCHEN, of No. 7 Elisabethstrasse, Pressburg, Hungary,
Freiherr, do hereby declare the nature of this invention to be as follows:-
This invention relates to the construction of a projectile for fire arms in the form
of a hollow bolt, the projectile being longitudinally perforated with a hole or channel
which may be of uniform diameter or may be of enlarged diameter at its breech end.
The projectile can be cast, stamped or turned in steel or other metal with or without
a soft metal coating.
The bottom of the projectile may be closed by a suitable sabot or plug with gas
check caps.
The accompanying drawing is a longitudinal section of a projectile according to
this invention with its breech enlarged for a plug or sabot.
The advantages of projectiles constructed according to this invention are:-
1. Decrease of weight for a given bore with equal cross section subjected to pressure,
and consequently increase of speed with a given charge of explosive.
2. Better guiding and less resistance in passing through the air.
3. Increased stability and precision.
4. Considerably diminished recoil and consequently greater precision.
5. Great perforating power especially when the projectile is made of hard metal.
When this projectile is used, especially in small arms, notwithstanding a greater
calibre, it is possible to obtain a trajectory as low as with a fire arm of considerably
smaller calibre, and thus with the large bores of old weapons a long low trajectory can
be obtained.
For military purposes, this projectile has the great advantage that, to obtain the
same effect as with the full weight projectile of equal calibre, there is a great diminu-
tion of the weight of the ammunition, that is to say for a given number of cartridges
there is greatly reduced weight of the lead, the gunpowder, and the cartridge case, and
moreover the thickness and weight of the barrel can also be reduced.
For sporting purposes, this projectile has the advantage that the mark of the shot
can be found, as it acts differently from a solid shot with less tearing or lacerating
effect, and it is very deadly without making large holes such as are made by bursting
shells.
The perforating power of the projectile when it is made of steel is very great, so
that, in hunting large game such as elephants, it is not necessary to use an arm of
large calibre, which on account of its great weight and recoil is very objectionable. "
By the use of the hollow projectile a weapon of large calibre can be made equivalent
to one of small calibre.
Dated this 9th day of September 1889.
ADEL & IMRAT
Agents for the Applicant.
COMI DID
An Improvement in Projectiles for Fire-arms.
I, RICHARD WALTERSKIRCHEN, of No. 7 Elisabethstrasse, Pressburg, Hungary,
Freiherr 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 construction of a projectile for fire arms in the
form of a hollow bolt, the projectile being longitudinally perforated with a hole

page_text: or channel which may be of uniform diameter or may be of enlarged diameter
at its breech end. The projectile can be cast, stamped or turned in steel or other
metal with or without a soft metal coating. The bottom of the projectile may be
closed by a suitable sabot or plug with gas check caps.
The drawing accompanying my provisional specification is a longitudinal section
of a projectile according to this invention with its breech enlarged for a plug or
sabot. The advantages of projectiles constructed according to this invention are:-
1. Decrease of weight for a given bore with equal cross section subjected to
pressure, and consequently increase of speed with a given charge of explosive.
2. Better guiding and less resistance in passing through the air.
3. Increased stability and precision.
4. Considerably diminished recoil and consequently greater precision.
5. Great perforating power, especially when the projectile is made of hard metal.
When this projectile is used, especially in small arms, notwithstanding a greater
calibre, it is possible to obtain a trajectory as low as with a fire arm of considerably
smaller calibre, and thus with the large bores of old weapons a long low trajectory
can be obtained.
For military purposes, this projectile has the great advantage that, to obtain the
same effect as with the full weight projectile of equal calibre, there is a great diminu-
tion of the weight of the ammunition, that is to say, for a given number of cartridges
there is greatly reduced weight of the lead, the gunpowder, and the cartridge case,
and moreover the thickness and weight of the barrel can also be reduced.
For sporting purposes this projectile has the considerable advantage that the
indications of having hit the game are always to be found, as the hollow bolt
projectile operates quite differently from a solid projectile. While on the one
hand the latter drives everything in front of it forward, the hollow projectile ou
the other hand drives everything laterally, and with living game, on the first
penetration the projectile, this drives everything rearward, so that it can be found
at the point where the game was struck.
The hollow projectile is also exceedingly deadly without forming large holes like
the bursting or expanding projectiles.
The perforating power of the hollow steel projectiles is so great, that for the largest
game, such as elephants &c. it is no longer necessary to use guns of such large
calibre as heretofore, the latter being exceedingly inconvenient on account of their
great recoil and weight.
When using the hollow projectile a gun of large calibre can be made to do
the service of a gun of small calibre, while affording a long and low trajectory.
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:-
A projectile for fire arms of a bolt shape having a longitudinal perforation, such
perforation being either of uniform diameter throughout, or being enlarged towards
the rear end, substantially as described.
Dated this 27th day of May 1890
ABEL & IMRAY,
Agents for the Applicant.