Year: 1897

page_text: I, MAX BIELEFELDT, of No. 8 Lutherstrasse, Wittenberg, Saxony, Doctor of
Philosophy, do hereby declare the nature of this invention to be as follows:-
In my application dated 14th August 1896 No. 18034, a method for manufactur-
ing safety explosives has been described consisting in mixing ammonium nitrate
and a small portion of potassium nitrate with a resin; I have now found that an
improved safety-explosive may be obtained by mixing ammonium nitrate, the base
of this class of explosives, with a small proportion of nitrate of sodium, barium,
calcium, or strontium instead of the formerly employed nitrate of potassium.
The explosive obtained by this method is safer against firedamp than that of the
explosive manufactured only with ammonium nitrate and resin. The proportions
preferable for the manufacture are:
Ammonium nitrate
100 parts by weight.
Nitrate of sodium, barium, calcium, or strontium 4.5 parts by weight.
Resin
5.5 "
وو
"
Instead of employing only one of the said nitrates with the ammonium nitrate,
a mixture of two or more thereof may be used, and they may also be mixed with
potassium nitrate.
The manufacture of the explosive is effected as follows:-
-
The ammonium nitrate, the other nitrate or a mixture of the quoted nitrates
and a small portion of potassium nitrate with the resin; I have now found that an
ingredients can be pulverised together, thereby at the same time mixing them.
This intimate mixture of ammonium nitrate, the other nitrate, and resin is then
heated in suitable heating apparatus, preferably closed, until the resin begins to
melt, but without causing the mass to become liquid. The cooled mixture is then
ground in the usual manner and filled into cartridges.
Dated this 30th day of January 1897.

page_text: the same is to be performed to be particularly described and ascertained in and by
the following statement
In my Specification of 1896 No. 18034, a method for manufacturing safety
explosives has been described consisting in mixing ammonium nitrate and a small
portion of potassium nitrate with a resin; I have now found that an improved
safety explosive may be obtained by mixing ammonium nitrate, the base of this
class of explosives, with a small proportion of nitrate of sodium, calcium or stron-
tium instead of the formerly employed nitrate of potassium.
The explosive obtained by this method is safer against firedamp than that of the
explosive manufactured only with ammonium nitrate and resin. The proportions
preferable for the manufacture are:
"
Life base of s
class of explosives, with a small proportion of nitrate of sodium, calcium or stron-
tium instead of the formerly employed nitrate of potassium.
The explosive obtained by this method is safer against firedamp than that of tho
explosive manufactured only with ammonium nitrate and resin. The proportions
preferable for the manufacture are:
Ammonium nitrate
100 parts by weight.
Nitrate of sodium, barium, calcium, or strontium 4.5 parts by weight.
Resin
-
5.5 "
"
"
Instead of employing only one of the said nitrates with the ammonium nitrate,
a mixture of two or more thereof may be used; and they may also be mixed with
potassium nitrate.
The manufacture of the explosive is effected as follows:-
The ammonium nitrate, the other nitrate or a mixture of the quoted nitrates
and resin are each separately pulverised, and then mixed together; or all three
ingredients can be pulverised together, thereby at the same time mixing them.
This intimate mixture of ammonium nitrate, the other nitrate, and resin is then
heated in suitable heating apparatus, preferably closed, until the resin begins to
melt, but without causing the mass to become liquid. The cooled mixture is then
ground in the usual manner and filled into cartridges.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
-
An explosive composed of ammonium nitrate thoroughly mixed with 4 or 5
per. cent. of resin and 4 or 5 per. cent. of nitrate of sodium, barium, calcium, or
strontium or of mixtures of these nitrates, the whole heated till the resin begins
to melt and after cooling, ground.
00.1