A NEW CHEMICAL COMPOUND FOR BLASTING PURPOSES
Year: 1872

page_text: LETTERS PATENT to Joseph Paul Raimond Poch, of Brussels, in the
Kingdom of Belgium, Chemist, for the Invention of "A NEW
CHEMICAL COMPOUND FOR BLASTING PURPOSES."
Sealed the 27th August 1872, and dated the 2nd March 1872.
PROVISIONAL SPECIFICATION left by the said Joseph Paul Raimond
Poch at the Office of the Commissioners of Patents, with his
Petition, on the 2nd March 1872.
I, JOSEPH PAUL RAIMOND POCH, of Brussels, in the Kingdom of
Belgium, Chemist, do hereby declare the nature of the said Invention
for "A NEW CHEMICAL COMPOUND FOR BLASTING PURPOSES," to be as follows:-
1
This Invention relates to a new chemical compound for blasting
purposes, which compound may be advantageously used in coal and
other mines, and in quarries and tunnelling as a substitute for gun-
powder and other explosive agents now employed for blasting.
My new chemical compound which I call "pudrolythe" when fired
does not explode suddenly like gunpowder, but it ignites and burns away,

page_text: fizzing like paper impregnated with saltpetre, and emitting with very
little smoke a large quantity of gas, which gas being confined in the
blasting hole presses on the sides thereof and splits and dislodges the
mass of rock or other substance operated on.
· To make my blasting compound or "pudrolythe," I use the following
ingredients, by preference in the proportions mentioned, though these
proportions may vary according to the quality of the compound required.
For 100 parts by weight of my compound I take,
3 parts by weight of spent tan.
5
"
3
وو
وو
wood sawdust.
nitrate of soda.
33
nitrate of baryta.
3
دو
6
دو
""
12
"
"
68
د,
33
charcoal.
sulphur.
saltpetre.
All which ingredients I use in a powdered state. I dissolve the
nitrate of soda and the nitrate of baryta together or separately in hot
water, and when completely dissolved I add to the solution the tan and
sawdust above mentioned, and I allow them to boil or evaporate till the
tan and sawdust have absorbed all the liquid, and the whole has become
dry. I then add the other ingredients above mentioned, and mix
the whole together in a rotatory chest or cylinder, or other suitable
mixing apparatus.
When properly mixed and prepared, my compound is of a dark green
color, and may be used for blasting in exactly the same way as ordinary
gunpowder, without the risk of those dreadful accidents which frequently
occur in the operation when an explosive compound is used.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of March, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Joseph Paul Raimond Poch, Her special
licence that I, the said Joseph Paul Raimond Poch, my executors,
administrators, and assigns, or such others as I, the said Joseph Paul
Raimond Poch, my executors, administrators, and assigns, should at
any time 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 "A NEW CHEMICAL COMPOUND FOR BLASTING PURPOSES," upon
the condition (amongst others) that I, the said Joseph Paul Raimond
Poch, 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 Joseph Paul Raimond Poch, 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 thereof, that is to say :-
This Invention relates to a new chemical compound for blasting
purposes, which compound may be advantageously used in coal and
other mines, and in quarries and tunnelling as a substitute for gun-.
powder and other explosive agents now employed for blasting.
My new chemical compound which I call "pudrolythe" when fired
does not explode suddenly like gunpowder, but it ignites and burns away,
fizzing like paper impregnated with saltpetre, and emitting with very
little smoke a large quantity of gas, which gas being confined in the
blasting hole presses on the sides thereof and splits and dislodges the
mass of rock or other substance operated on.
To make my blasting compound or "pudrolythe," I use the following
ingredients, by preference in the proportions mentioned, though these

page_text: but what I claim is, the combining matters for the purpose of producing
a new chemical compound for blasting purposes, substantially as
described.
In witness whereof, I, the said Joseph Paul Raimond Poch, have
hereunto set my hand and seal, this Twenty-first day of August, in
the year of our Lord One thousand eight hundred and seventy-
two.
JOSEPH PAUL RAIMOND POCH. (L.S.)