An Improved Manufacture of Cartridge Cases. OF CARTRIDGEES
Year: 1885

page_text: An Improved Manufacture of Cartridge Cases.
I, FRANCIS BOLTON, of N° 4 The Sanctuary, Westminster in the County of
Middlesex, Knight, do hereby declare the nature of my invention for " AN
IMPROVED MANUFACTURE OF CARTRIDGE CASES to be as follows:-
»
"
My invention relates to the production of a cartridge case for use in breech
loading fire-arms for containing both the powder and the ball or charge of shot
that is to say, a cartridge case which I term "the non-residuum Cartridge case
which shall be either entirely disintegrated, or consumed or destroyed by the
explosion of the charge, or sufficiently destroyed, or disintegrated or consumed as
to render the extraction of the remainder perfectly easy, thus preventing the
possibility of the gun being rendered unserviceable by the sticking or jamming of
the Cartridge case after the discharge.
In order to effect this, I make the Cartridge case out of soluble gun cotton or
other explosive celluloid substance.
To the dissolved gun cotton or celluloid I add some substance, such as Camphor,
or Blacklead or both, in sufficient quantity to render it non-explosive or only
explosive by detonation, while leaving it sufficiently inflammable to disintegrate
by the explosion of the contained charge, at the same time rendering it capable of
withstanding the highest heat to which the fire arm could be heated by rapid and
continuous firing.
In order to prevent fouling of the chamber of the fire arm the substance added
must be such as will leave little or no residue after combustion.
I sometimes prefer instead of taking ordinary gun cotton or other explosive
celluloid substance to manufacture a non-explosive or only slightly explosive
material by the well known methods of varying the strength of the acids and the
time of immersion. In this case, the use of a diluent to retard explosion may be
partly or wholly dispensed with.
If found advisable, the strength of the explosive celluloid can by a combination
of diluents, and of the first chemical treatment, be so regulated that the cases,
although unexplodable by ordinary shocks, will explode by the detonation of the
charge when fired, and thus increase propelling force of the said charge.
The cases may be either entirely moulded out of celluloid treated as above, a
small charge of fulminate being placed in the centre of the base protected by

page_text: a covering of the dissolved celluloid, in which case they will be entirely consumed
by the discharge of the gun so that no extraction would be required, or they may
be attached to a metal head which would carry the ordinary anvil and cap and
which would then alone have to be extracted. This metal head, being quite short,
could not stick or jam in the gun, and this will act as a gas check and prevent
the escape of the gases arising from the explosion, past the breach piece of the
fire arm.
In order to preserve the cases from fire and accident I sometimes cover them
with a very thin coating of metal by means of electro-deposition. This coating of
metal, preferably gold, is so thin as to be entirely carried out of the gun by the
discharge.
The cartridge cases made on any of the above methods, are charged in the
ordinary way.
TL 11
ديمي
1

page_text: I, FRANCIS BOLTON of N° 4 The Sanctuary Westminster in the County of
Middlesex, Knight, 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:-
"
My invention relates to the production of a cartridge case for use in breech
loading fire-arms for containing both the powder and the ball or charge of shot,
that is to say, a cartridge case which I term "the non-residuum Cartridge case
which shall be either entirely disintegrated or consumed or destroyed by the
explosion of the charge, or sufficiently destroyed, or disintegrated or consumed as
to render the extraction of the remainder perfectly easy, thus preventing the
possibility of the gun being rendered unserviceable by the sticking or jamming of
the cartridge case after the discharge.
In order to effect this I make the cartridge case out of soluble gun cotton or
other explosive celluloid substance.
To the dissolved gun cotton or celluloid I add some substance, such as Camphor
or Blacklead or both in sufficient quantity to render it non-explosive or only
explosive by detonation, while leaving it sufficiently inflammable to disintegrate
by the explosion of the contained charge, at the same time rendering it capable of
withstanding the highest heat to which the fire arm could be heated by rapid and
continuous firing.
In order to prevent fouling of the chamber of the fire arm the substance added
must be such as will leave little or no residue after combustion.
I sometimes prefer, instead of taking ordinary gun cotton or other explosive
celluloid substance, to manufacture a non-explosive or only slightly explosive
material by the well known methods of varying the strength of the acids and
the time of immersion. In this case, the use of a diluent to retard explosion may
be partly or wholly dispensed with.
If found advisable, the strength of the explosive celluloid can, by a combination
of diluents and of the first chemical treatment, be so regulated that the cases,
although unexplodable by ordinary shocks, will explode by the detonation of the
charge when fired, and thus increase the propelling force of the said charge.
The cases may be either entirely moulded out of celluloid treated as above,
a small charge of fulminate being placed in the centre of the base, protected by a
covering of the dissolved celluloid, in which case they will be entirely consumed
by the discharge of the gun so that no extraction would be required, or they may
be attached to a metal head which would carry the ordinary anvil and cap and
which would then alone have to be extracted. This metal head, being quite short,
could not stick or jain in the gun, and this will act as a gas check and prevent
the escape of the gases, arising from the explosion, past the breech piece of the
fire arm.
In order to preserve the cases from fire and accident I sometimes cover them
with a very thin coating of metal by means of electrodeposition. This coating

page_text: of metal, preferably gold, is so thin as to be entirely carried out of the gun by the
discharge.
The cartridge cases made on any of the above methods are charged in the
ordinary way.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is:
An improved manufacture of cartridge cases composed of gun cotton or other
explosive material so treated as not to be readily inflammable but which will be
more or less completely consumed when the cartridge is fired in the gun, substan-
tially as herein described.