Improvements in Pliers for use in Attaching Fuses and Detonator Tubes to Explosive Cartridges.
Year: 1889

page_text: Date of Application, 13th Apr., 1889
Complete Specification Left, 7th Jan., 1890-Accepted, 8th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Pliers for use in Attaching Fuses and Detonator
Tubes to Explosive Cartridges.
I, GEORGE SMITH, of Polmont, in the County of Stirling, North Britain, Chemist
to Nobel's Explosives Company, Limited, do hereby declare the nature of this Invention
to be as follows, that is to say :-
My said Invention has for its object by an improved construction designed for the
purpose, to render pliers capable of being conveniently used in an improved manner
for attaching fuses and detonator tubes to explosive cartridges.
Pliers made according to my Invention have the usual two arms which are jointed
together, the parts at and near the joint being made flat and so as to slide each
upon
other. Near the joint oval slots are formed through the flat parts, these slots being wider
at the parts which are over each other when the pliers are open and narrower at the parts
which are over each other when the pliers are closed. In the closed position of the
pliers the parts of the slots over each other form a round hole smaller than the outside
of the detonator tube; and when the end of the fuse has been entered into the tube
and the tube has been put through the slots in the open position of the pliers the
closing of the pliers causes the tube to be indented equally all round at one part so as
to grip the fuse. At other parts of the plier arms provision is made for cutting the
end of the fuse, a cutter being formed or fixed on one arm, and a half-round groove
being formed in the other arm to receive the fuse whilst being cut. This groove is
by preference made oblique so that the fuse may be cut obliquely instead of squarely
The half-round groove prevents the fuse from being compressed out of shape when
being cut, and the obliquity of the cut facilitates the introduction of the fase
into the detonator tube and exposes a larger surface of its core in contact with the
detonating explosive.
One arm of the pliers is as usual made with a copper end for forming a cavity in
the cartridge to receive the detonator tube.
Dated this Tifth day of Anvil 1880.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Pliers for use in Attaching Fuses and Detonator
Tubes to Explosive Cartridges.
I, GEORGE SMITH, of Polmont, in the County of Stirling, North Britain, Chemist
to Nobel's Explosives Company, Limited, 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, that is to say :—
My said Invention has for its object, by an improved construction designed for the
purpose, to render pliers capable of being conveniently used in an improved manner
in attaching fuses, and detonator tubes to explosive cartridges.
A pair of pliers made according to my Invention is shown on an accompanying
sheet of explanatory drawings, figures, 1, and 2, being elevations of opposite sides,
and with the pliers in their opened and closed positions. Figure, 3, is an edge view,
and figures, 4, and 5, are sections showing certain parts in different positions. In
these drawings the same reference letters are used to mark the same or like parts
wherever they are repeated.
My improved pliers have the usual two arms, A, B, which are jointed together with
a riveted pin, C, the parts, D, E, at and near the joint being made flat and so as to

page_text: slide upon each other. Near the joint, oval slots, F, G, are formed through the flat
parts, D, E, these slots being a little wider at the parts which are over each other
when the pliers are open, and narrower at the parts which are over each other when
the pliers are closed. In the closed position (figure, 2.) the parts of the slots, F, G,
over each other form a round hole slightly smaller than the outside of the detonator
tube and when the end of the fuse has been entered into the tube and the tube has
been put through the slots, F, G, in the open position of the pliers, the closing of the
pliers causes the tube to be indented equally all round at one part so as to grip the
fuse. At other parts of the plier arms provision is made for cutting the end of the fuse,
a cutting edge or cutter, H, being forined or fixed on one arm, A, and a half-round
groove, J; being formed in the other arm, B, to receive the fuse whilst being cut.
This groove, J, is by preference made oblique so that the fuse may be cut obliquely
instead of squarely. The half-round groove, J, prevents the fuse from being com-
pressed out of shape when being cut, and the obliquity of the cut facilitates the
introduction of the fuse into the detonator tube and exposes a larger surface of its
core in contact with the detonating explosive.
One arm, B, of the pliers is as usual made with a copper end, K, for forming a
cavity in the cartridge to receive the detonator tube.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Constructing pliers for use in attaching fuses and detonator tubes to explosive
cartridges, in the improved manner substantially as hereinbefore described and as
shown in the accompanying drawings.
Dated this Sixth day of January 1890.
EDMUND HUNT,
Applicant's Agent.