IMPROVEMENTS IN THE MANUFACTURE OF EXPLOSIVE COMPOUNDS FOR BLASTING PURPOSES
Year: 1878

page_text: LETTERS PATENT to John Davies Treharne, of Cardiff, in the County of
Glamorgan, Chemist, and Edward Jones, of Caerphilly, in the same County;
Engineer, for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
EXPLOSIVE COMPOUNDS FOR BLASTING PURPOSES."
Sealed the 6th December 1878, and dated the 8th October 1878.
PROVISIONAL SPECIFICATION left by the said John Davies Treharne and
Edward Jones at the Office of the Commissioners of Patents on the 8th
October 1878.
JOHN DAVIES TREHARNE, of Cardiff, in the County of Glamorgan, Chemist,
and EDWARD JONES, of Caerphilly, in the same County, Engineer. "IMPROVEMENTS
IN THE MANUFACTURE OF EXPLOSIVE COMPOUNDS FOR BLASTING PURPOSES."
The object of this Invention is so to prepare nitro-glycerine as to remove the
liability of its exploding while being handled or prepared for use.
In carrying out this object, we first prepare the nitro-glycerine in the ordinary
manner, and then add thereto carbonate of magnesia in such proportion that it will
absorb the nitro-glycerine and form a dry compound. In preparing this compound,
we have found that a good result may be obtained by adding 25 parts of carbonate
of magnesin to 75 parts of nitro-glycerine.
The compound thus prepared, besides being safe to handle, may be produced at
less cost than compounds of a similar character at present manufactured.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Davies Treharne and Edward Jones in the Great Seal Patent
Office on the 8th April 1879.
JOHN DAVIES TREHARNE, of Cardiff, in the County of Glamorgan, Chemist, and
EDWARD JONES, of Caerphilly, in the same County, Engineer. "IMPROVEMENTS IN
THE MANUFACTURE OF EXPLOSIVE COMPOUNDS FOR BLASTING PURPOSES."
The object of this Invention is so to prepare nitro-glycerine as to remove the
liability of its exploding while being handled or prepared for use. Various processes
have already been proposed for attaining this end, and that with varying advan-
tages and at greater or less cost. We now propose to provide an inexpensive
absorbent for the nitro-glycerine, and one which will answer efficiently in removing
its liability to explode prematurely.
In carrying out our Invention, we first prepare the nitro-glycerine in the
ordinary manner, and then add thereto magnesia, by preference in the form of a
carbonate, in such proportion that it will absorb the nitro-glycerine and form a dry
compound.
In preparing this compound, we have found that a good result may be obtained
by adding twenty-five parts of carbonate of magnesia to seventy-five parts of nitro-
glycerine.
The compound thus prepared, besides being safe to handle, may be produced at
less cost than compounds of a similar character at present manufactured.
Having now set forth the nature of our Invention of "Improvements in the
Manufacture of Explosive Compounds for Blasting Purposes," and explained the
imanner of carrying the same into effect, we wish it to be understood that under the
above in part recited Lotters Patent, we claim,—
The addition to nitro-glycerine of carbonate of magnesia, or an equivalent com-
pound of magnesia as an absorbent thereof, for the purpose above set forth.
In witness whereof, we, the said John Davies Treharne and Edward Jones,
have hereunto set our hands and seals, the Seventh day of April, in the
year of our Lord One thousand eight hundred and seventy-nine.
TATT
חדזמות
Signed, sealed, and delivered by. the
above-named John Davies Treharne
and Edward Jones in the presence of
ROB. Y. EVANS,
Sol, Cardiff.
PATIES LIVE
EDWARD JONES.
(L.S.)