Year: 1888

page_text: We, LEOPOLD PLOM, Mining Engineer of Retinne and JULIEN D'ANDRIMONT,
Senator, of Liege, both in the Kingdom of Belgium do hereby declare the nature of
this invention to be as follows
This invention relates to an improved construction of blasting cartridges for mining
purposes whereby, should the cartridge, after insertion into the blast hole, fail to be
fired by the fuze, it may be withdrawn gently and without danger from the blast hole
Such withdrawal of the cartridges offers in so far a considerable advantage, as by this
means the danger which must always arise from the existence of a non-exploded
cartridge in a blast hole, is entirely obviated
The construction of cartridge for fulfilling the above named purpose is shewn is
longitudinal section on the accompanying drawing, it consists of a thin metal
casing H closed at the end B, and filled with the blasting compound, into which
the fuze L is inserted to about the middle of the length of the cartridge At a certain
distance from the end of the fuze a knot K is tied therein which is made to bear
against the inner face of the plug P, the other part beyond the knot being passed
through the plug to the outside The plug P, which may be of wood or other material,
18 made of considerably greater length than the ordinary plugs, and after it has been
inserted into the open end of the casing H, the edger of the latter is turned up over
the end of plug
From this construction it will be seen that if the fuse is extinguished after ignition
and so fails to fire the cartridge, this can be gently drawn out of the blast hole by
pulling at the fuze, without any danger of accidental ignition
The fuze is for this purpose by preference provided with a central metal wire, by
which the cartridge can be drawn out, should the other part of the fuze have burnt
away up to the cartridge, but ordinary fuses may be employed, as in the case of a
misfire these are usually extinguished at such a distance from the cartridge as to leave
sufficient length to lay hold of Should such fuses burn away up to the cartridge, a
corkscrew or other screw may be inserted into the plug P for withdrawing the
cartridge as the plug is of sufficient thickness to enable this to be done

page_text: The case H may be made of any other suitable material than metal, provided the
outer end into which the plug P fits is of metal or other sufficiently strong material to
allow of its edge being bent over so as to hold the plug against the pull in with-
drawing the cartridge
We, LEOPOLD PLOM, Mining Engineer of Retinne and JULIEN D'ANDRIMONT, I
Senator, of Laege, both in the Kingdom of Belgium do hereby declare the nature of
this invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement
-
This invention relates to an improved construction of blasting cartridges for mining
purposes whereby, should the cartridge, after insertion into the blast hole, fail to be 1
hred by the fuze, it may be withdrawn gently and without danger from the blast hole
Such withdrawal of the cartridges offers in so far a considerable advantage, as by this
means the danger which must always arise from the existence of a non-exploded
cartridge in a blast hole, is entirely obviated
The construction of cartridge for fulfilling the above named purpose 15 shown in 2
longitudinal section on the drawing accompanying our Provisional Specification, it
consists of a thin metal casing H closed at the end B, and filled with the blasting
compound, into which the fuze L is inserted to about the middle of the length of the
cartridge At a certain distance from the end of the fuze a knot K is tied therein
which is made to bear against the inner face of the plug P, the other part beyond the
knot being passed through the plug to the outside The plug P, which may be of
wood or other material, is made of considerably greater length than ordinary
plugs, and after it has been inserted into the open end of the casing H, the edge of the
Jatter is turned up over the end of plug
From this construction it will be seen that if the fuze is extinguished after ignition
and so fails to fire the cartridge, this can be gently drawn out of the blast hole by
pulling at the fuze, without any danger of accidental ignition
The fuze is for this purpose by preference provided with a central metal wire, by
which the cartridge can be drawn out, should the other part of the fuze have burnt
away up to the cartridge, but ordinary fuses may be employed as in the case of a

page_text: misfire these are usually extinguished at such a distance from the cartridge as to
leave sufficient length to lay hold of Should such fuzes burn away up to the cartridge,
a corkscrew or other screw may be inserted into the plug P for withdrawing the
cartridge as the plug is of sufficient thickness to enable this to be done
The case H may be made of any other suitable material than metal, provided the
outer end into which the plug P fits is of metal or other sufficiently strong material to
allow of its edger being bent over so as to hold the plug against the pull in with-
drawing the cartridge
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what
we claim 18.-
In blasting cartridges, the combination with the casing H of a plug P of increased
length, of wood or other material over which the edge r of the casing is turned,
and a fuze L passing through the plug and having a knot or enlargement K formed
on it beyond the inner end of the latter, whereby the withdrawal of the cartridge in
the case of misfire is facilitated substantially as herein described.
D
4
"
1000
ABEL & IMRAY,
Agents for the Applicants.