IMPROVEMENTS IN THE MANUFACTURE
Year: 1883

page_text: LETTERS PATENT to Henry Edward Newton of the Office for Patents
CARTRIDGES
"
66 Chancery Lane in the County of Middlesex, Civil Engineer for an
Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
communicated to him from abroad by La Société Anonyme Dynamite Nobel
of Isleten, Canton of Uri, Switzerland
PROVISIONAL SPECIFICATION left by the said Henry Edward Newton at
the Office of the Commissioners of Patents on the 29th June 1883.
HENRY EDWARD NEWTON of the Office for Patents 66 Chancery Lane in the
County of Middlesex, Civil Engineer "IMPROVEMENTS IN THE MANUFACTURE
OF CARTRIDGES," [communicated to him from abroad by La Société Anonymo
Dynamite Nobel of Isleten, Canton of Uri, Switzerland]
In the specification of a patent granted to the present applicant, and dated the
28th June 1882 N° 3055, a mode of preparing cartridges to render them impermeable
to humidity is described, but the explosives therein referred to are those having a
nitro-glycerine base, and which are usually sold in a solid or semi-solid state.
It has been found that explosives in a pulverulent state may be prepared in a
similar mannor, and the object of the present invention is to produce a watertight
cartridge, the explosive being in a pulverulent or granulated condition.
In carrying out this invention, the explosive is first compressed in a cylinder of
paper, pasted or not. This paper may be plain or varnished, or treated, previously
to use, with paraffin.
The ends of the cylinders of explosive may, if desired, be protected with discs of
paper, and the ends of the paper tube will be folded down onto the discs of paper.
The cartridge thus formed is plunged into a bath prepared in the manner
described in the specification of the patent before referred to, and consisting of a
mixture of paraffin and ozokerit, to which may be added, according to circumstances,
wax, linseed oil, resin, colophony, pitch, tar, essence of turpentine, and fatty bodies
in general, together or separately.
:
The cartridge is left in the bath a sufficiently long time to become thoroughly
heated, and on being withdrawn, is rolled, while still hot, in a paper envelope,

page_text: which has been previously prepared or coated with the mixture composing the
bath.
The paper forming this envelope may be of any desired thickness or strength to
withstand breaking from shocks, and the ond of the tube will be folded down in
the ordinary manner.
The heat of the cartridge will soften and melt the coating of the envelope, and
on cooling, the fatty portion of the coating, combining with the corresponding
portion on the cartridge, will form a solid body between the envelope and the
cartridge, and hermetically enclose the cartridge therein, thus effectually preventing.
the entrance of humidity.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Edward Newton in the Great Seal Patent Office on the
29th December 1883.
HENRY EDWARD NEWTON of the Office of Patents 66 Chancery Lane in the
County of Middlesex Civil Engineer "IMPROVEMENTS IN THE MANUFACTURE
OF CARTRIDGES a communication to me from abroad by La Société Anonyme
Dynamite Nobel of Isleten, Canton of Uri, Switzerland
"
The difficulty of obtaining cartridges impermeable to humidity and consequently
of avoiding the deterioration that this humidity causes to tho explosive, suggested
à modo of preparing a watertight cartridge for which a Patont was granted to the
present applicant dated the twenty eighth June One thousand eight hundred and
eighty two N° 3055.
-
In the Specification of this Patent a description was given of the mode of
procedure with reference only to explosives having a nitroglycerine base and which
are usually sold in a pasty or solid state.
It has been found that explosives in a pulverulent state may be prepared in a
similar manner and the object of the present Invention is to produce a watertight
cartridge the explosive being in a pulverulent or granulated condition.
In carrying out this Invention the pulverulent explosive is first compressed in a
cylinder of paper which serves as an envelopo.
This paper may be plain or varnished or may be treated with paraffin before use.
The ends of the cylinder of explosive may if desired be protected with a wad or
disc of paper and the ends of the paper tubo will be folded down onto the discs of
paper or wads.
The cartridge thus formed is plunged into a bath prepared in the manner
described in the Specification of the Patent before mentioned and consisting of a
mixture of paraffin and ozokerit to which according, as to whether the cartridges
are to be used in hot or cold climates, to the nature of the explosive or to any
other circumstances, is added wax, linseed oil, resin, colophony, pitch, tar essence of
turpentine or any other suitable fatty body together or separately.
The cartridge having been left in the bath a sufficiently long time to become

page_text: thoroughly heated, is withdrawn and is rolled while still hot in a paper envelope
which has been previously prepared or coated with the mixture composing the
bath. The paper forming this envelope may be of any desired thickness or
strength to withstand breaking from shocks and the extremities of the tube are
folded down in the ordinary manner.
The beat of the cartridge softens and melts the coating of the envelope and when
the cooling takes place the fatty portion of the coating on the envelope combining
with the corresponding portion on the cartridge will form a solid fatty body
between the envelope and the cartridge and hermetically enclose the cartridge
therein thus effectually preventing the entrance of humidity
Having now described this Invention for "Improvements in the manufacture of
Cartridges" as communicated to me from abroad and explained the manner of
carrying the same into effect I claim.
The mode herein described of preparing waterproof cartridges with pulverulent
or granulated explosives such mode consisting in establishing a waterproof envelope
round the explosive by sealing the wrapped paper on the envelope with warm fatty
mixtures as above described.
In witness whereof I the said Henry Edward Newton have hereunto set my
hand and seal the 29th day of December in the year of our Lord One thousand
eight hundred and eighty three.