Improvements in Projectiles.
Year: 1893

page_text: Date of Application, 27th Feb., 1893
Complete Specification Left, 27th Nov., 1893-Accepted, 6th Jan., 1894
IVATION.
Improvements in Projectiles.
A communication from MAX VON FOERSTER, Engineer, of Berlin, in the Kingdom
of Prussia.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent do hereby declare the nature of this invention to be as
follows:-
Projectiles have been made hitherto of the heaviest possible metal in order to
enable them to overcome the resistance of air as well as possible. These projectiles
have for many purposes, such as for hunting and shooting at targets, where the action
takes place only at a small distance, a large amount of excess of force, whereby the
environs were put in danger at a long distance; for this reason the use of ball
projectiles was but a restricted one.
By the present invention I make projectiles from aluminium which on account of
their light weight do not offer the above mentioned inconveniences. The new
technical effect, which I attain, consists in that, in maintaining the same large
powder charge as for heavy projectiles, the grazing becomes at small distances say
up to 100 meters, greater than with heavy projectiles.
Furthermore it has been found by experiment that at such distances the
percentage of hitting is equal to that of heavy projectiles, whilst the resistance of
air acts on the light projectiles in such a manner, that their force decreases very
rapidly at distances beyond 100 meters. In consequence thereof the trajectory of
the projectiles is very short and the danger for persons, who may be behind the
target, is reduced to a minimum.
The above mentioned advantages are offered in a similar degree by alloys of
aluminium, which are prepared for the purpose of giving the projectile inaterial a
lighter specific gravity and consequently the alloys containing up to 50% aluminium
are comprised in this invention.
The invention is applicable not only for ball cartridges with a single projectile
but also for cartridges with small-shot i.e. for cartridges the charge of which
contains a large number of small projectiles. The advantage consists principally
in this case in the fact that owing to a lower total weight, a larger number of small
projectiles can be utilized in a charge, whereby the spreading and in consequence
the probability of hitting will be correspondingly increased.
Dated this 27th day of February 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Projectiles.
A communication from MAX VON FOERSTER, Engineer, of Berlin, in the Kingdom
of Prussia.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, 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 :-
Projectiles have been made hitherto of the heaviest possible metal in order to
077

page_text: enable them to overcome the resistance of air as well as possible. These projectiles
have for many purposes, such as for hunting and target-shooting, where the effects
are limited within a comparatively short range, a large amount of excess of force,
whereby the neighbourhood is put in danger at a long distance; for this reason the
use of bullets was but a restricted one.
By the present invention I make projectiles from aluminium which on account of
their light weight are not attended by the above-mentioned defects. The new
technical effect, which is attained, consists in that in maintaining the same large
powder charge as for heavy projectiles, the initial velocity and consequently the
Hattening of the trajectory become, at small distances say up to 100 metres,
greater than with heavy projectiles, so as to convert its character into that of a
grazing fire."
Furthermore it has been found by experiment that at such distances the per-
centage of hits is equal to that of heavy projectiles, whilst the resistance of air acts
on the light projectiles in such a manner, that their force decreases very rapidly at
distances beyond 100 metres. In consequence thereof the trajectory of the pro-
jectiles is very short and the danger for persons, who may be behind the target, is
reduced to a minimum.
The above-mentioned advantages are offered in a similar degree by alloys of
aluminium, which are prepared for the purpose of giving the projectile material a
lighter specific gravity and consequently alloys containing not less than 50% of
aluminium are comprised in this invention.
The invention is applicable not only for ball cartridges with a single projectile but
also for cartridges with small shot i.e. for cartridges the charge of which contains a
large number of small projectiles. The advantage consists principally in this case
in the fact that owing to a lower total weight, a larger number of small projectiles
can be utilized in a charge, whereby the spreading and in consequence the
probability of hitting will be correspondingly increased.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent, and in what manner
the same is to be performed, I declare that what I claim is ;-
The manufacture of projectiles from aluminium or alloys containing not less than
50 per cent. of aluminium with other metals.
Dated this Twenty-seventh day of November 1893.
'
W. P. THOMPSON & BOULT,
Agents for the Applicant.