IMPROVEMENTS IN THE CONSTRUCTION OF CARTRIDGES FOR BLASTING PURPOSES
Year: 1874

page_text: LETTERS PATENT to Benjamin Smith Lloyd, of George Yard, Lombard
Street, in the City of London, Merchant, for the Invention of
"IMPROVEMENTS IN THE CONSTRUCTION OF CARTRIDGES FOR BLASTING
PURPOSES." A communication from abroad by the Honorable
Thomas Holt, Andrew Garran, and Edward Charles Cracknell, all
of Sydney, New South Wales.
-
Sealed the 1st December 1874, and dated the 7th July 1874.
PROVISIONAL SPECIFICATION left by the said Benjamin Smith Lloyd
at the Office of the Commissioners of Patents, with his Petition, on
the 7th July 1874.
I, BENJAMIN SMITH LLOYD, of George Yard, Lombard Strect, in the
City of London, Merchant, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF CARTRIDGES FOR BLASTING
PURPOSES," to be as follows:-
The disruptive power of an explosive substance is increased by its
being confined within a resisting envelope, by which means a complete
combustion is secured from the entire bulk of the contents being turned

page_text: into gas before the envelope is ruptured, and a corresponding economy
of explosive material is obtained.
The present Invention consists in so constructing cartridges for blasting
purposes that the above principle may be usefully applied. To this end
the gunpowder, gun cotton, nitro-glycerine, dynamite, lithofracteur, or
other explosive substance, cither separately or mixed, either compressed.
or uncompressed, is enclosed within iron, steel, copper, brass, or other
metallic casing, or a casing of glass or carthenware.
The metal casings may, if desired, be painted or oiled, coated or covered
with tar, pitch, varnishì, resin, enamel, or any other material, and the
size and strength of cach casing must be determined according to the
special purpose for which such blast may be required.
The shape may be either circular, cylindrical, oval, rectangular, or
otherwise, according to the purpose for which it may be required, or to
suit the cavity in which this cartridge may be placed, and this casing
may be either single or double or otherwise multiplied, and may be made
in one picce or in segments.
The ignition may be caused by fuze or by electrical battery, or by the
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Benjamin Smith Lloyd in the Great Seal Patent
Office on the 7th January 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
SMITH LLOYD, of George Yard, Lombard Street, in the City of London,
Merchant, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of July, in the year of our
Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Benjamin Smith Lloyd, Her special
licence that I, the said Benjamin Smith Lloyd, my executors, admini-
strators, and assigns, or such others as I, the said Benjamin Smith
Lloyd, my executors, administrators, and assigns, should at any time

page_text: agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF CARTRIDGES FOR BLASTING PURPOSES,"
being a communication to me from abroad by the Honorable Thomas Holt,
Andrew Garran, and Edward Charles Cracknell, all of Sidney, New South
Wales, upon the condition (amongst others) that I, the said Benjamin
Smith Lloyd, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Benjamin Smith Lloyd, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in, and by
the following statement, reference being had to the Drawing hereunto
annexed, and to the letters and figures marked thereon (that is to say) :-
This Invention consists in increasing the disruptive power of an
explosive substance by confining it within a resisting envelope. By
this means a complete combustion of the explosive substance is insured,
and the entire bulk of the contents of the cartridge is converted into gas
before the envelope is ruptured, a corresponding economy of explosive
3 material is therefore obtained.
The improved blasting cartridges are so constructed that the gun-
powder, gun cotton, nitro-glycerine, dynamite, lithofracteur, or other
explosive substance, used either separately or mixed, and either in a
compressed or uncompressed state, is enclosed within an iron, steel,
a casing of glass or
O copper, brass, or other metallic casing, or
earthenware.
The metal casings may, if desired, be painted or oiled, coated or
covered with tar, pitch, varnish, resin, enamel, or any other material,
and the size and strength of each casing may be determined according
5 to the special purpose for which such blast may be required.
The shape may be either circular, cylindrical, oval, rectangular, or
otherwise, according to the purpose for which it may be required, or to

page_text: Having now described the nature and object of the present Invention,
and its advantages, I claim as the Invention to be secured to me by
Letters Patent as aforesaid, the construction of cartridges for blasting
purposes by confining the explosive substances within a covering suffi-
ciently strong to offer considerable resistance, and thereby to give
increased efficacy to the expansive action of the gases produced by the
combustion of the explosive agent.
In witness whereof, I, the said Benjamin Smith Lloyd, have here-
unto set my hand and seal, the Fifth day of January, in the year
of our Lord One thousand eight hundred and seventy-five.