Solid Oblong Composite Projectile for Small Arms having a Smooth Bore, or with Long Twist Rifling.
Year: 1895

page_text: Date of Application (in United Kingdom), 27th Aug., 1895
Complete Specification Left, 4th Nov., 1895-Accepted, 7th Dec., 1895
Solid Oblong Composite Projectile for Small Arms having a Smooth
Bore, or with Long Twist Rifling.
I GIACINTO TUA, Major Commandant, La Caserne Naples, Italy, do hereby
declare the nature of this invention to be as follows: —
The projectile or bullet forming the subject of my invention has for its chief
feature the location of its centre of gravity in advance of its lengths centre, this
being contrary to the known practice with regard to solid projectiles for small arms
which by reason of the homogeneity or uniformity of their cores have their centre
of gravity almost at their lengths centre.
This is obtained by the union of two or more metals or other materials of
different densities the more dense being placed in front and the less dense at
the rear.
The metals forming the projectile may be united either by soldering or otherwise
fixing them in a case or a coating in the manner well known for homogeneous
or uniform projectiles or finally by introducing one of them into a hollow of
the other.
The invention is applicable for all projectiles and having for their distinctive
feature the position or location of their centre of gravity out of their lengths
centre.
As an example only only and in view of the difficulty of describing every kind
of projectile to which my invention may be applied, I give herewith the details
of a type of projectile of 4 millimetres caliber.
In a casing of very thin steel or German silver 44 millimetres long, a core of
lead is placed, 26 millimetres long which fills up the point end. The remaining
space is filled up with aluminium pure or its alloy. These metals are soldered to
the casing or held in place by a flange or rim of the casing. The centre of gravity
is therefore on an axis at 14 mm 8 from the point whilst its centre proper is 23
from the point.
The difference is thus 8/3.
/m
For the purpose of a better trajectory rifled barrels may be used but the velocity
of rotation would be much less than that required for solid and homogeneous
projectiles. Thus for a caliber of 4 " which would require 22,000 revolutions of
the projectile in the first second of time but only about 300 turns would be necessary
in the same time with my projectile.
The projectile is applicable for smooth bore barrels and for rifled barrels having
long twists.
Dated this 28th day of August 1895.

page_text: Solid Oblong Composite Projectile for Small Arms having a Smooth
Bore, or with Long Twist Rifling.
I, GIACINTO TUA, Major Commandant, La Caserne Naples, Italy, 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 projectile or bullet forming the subject of my invention has for its chief
feature, the location of its centre of gravity in advance of its lengths centre, this
being contrary to the known practice with regard to solid projectiles for small arms
which by reason of the homogeneity or uniformity of their cores have their centre
of gravity almost at their lengths centre. This is obtained by the union of two or
more metals or other materials of different densities, the more dense being placed in
front, and the less dense at the rear.
The metals forming the projectile may be united either by soldering or
otherwise fixing them in a case or a coating in the manner well known for
homogeneous or uniform projectiles; or finally by introducing one of them into
a hollow of the other.
The invention is applicable for all projectiles and having for their distinctive
feature the position or location of their centre of gravity out of their lengths
centre.
As an example only and in view of the difficulty of describing every kind of
projectile to which my invention may be applied, I represent in the annexed
drawing a projectile of the type referred to on an enlarged scale.
In a casing A of very thin steel, German silver or other metal, say 44 millimetres
long, a core of lead B is placed, 26 millimetres long, which fills up the point
end C. The remaining space is filled up with aluminium D (pure or its alloy).
These metals are soldered to the casing, or held in place by a flange or rim of the
casing. The centre of gravity is therefore on an axis at 14 / 8 from the point,
whilst its centre proper is 23 m/m from the point. The difference is thus 8, m/m 3.
For the purpose of a better trajectory, rifled barrels may be used but the
velocity of rotation would be much less than that required for solid and homo-
geneous projectiles. Thus ior a caliber of 4 m/m which would require 22,000
revolutions of the projectile in the first second of time but only about 300 turns
would be necessary in the same time with my projectile.
The projectile is applicable for smooth bore barrels and for rifled barrels
having long twists.
Having now particularly described and
tion and in what manner the same is to
claim is :-
ascertained the nature of this inven-
be performed I declare that what I
The construction of solid oblong composite projectiles in the manner set forth,
having their centre of gravity a little in advance of their length's centre by the
employment of metals of different densities, in order to maintain the projectiles
with the point foremost during flight, whether fired from smooth bore fire arms, or
from long twist rifled arms, as above described.
The 4th day of November 1895.