Improvements in Apparatus for Igniting Safety Fuses.
Year: 1892

page_text: Date of Application, 27th Jan., 1892
Complete Specification Left, 27th Oct., 1892-Accepted, 3rd Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Igniting Safety Fuses.
I, HUBERT TREWEEKE ROBINSON, of Camborne, Cornwall, Accountant, do
hereby declare the nature of this invention to be as follows:-
This invention relates to apparatus for igniting safety fuses without exposing
Hame or sparks, thus avoiding the risks attending ignition of fuses for blasting in
an explosive atmosphere.
The apparatus for this purpose is in the form of a pistol having its barrel
divided longitudinally, the one half hinged to the other so that it can be closed on
it like a lid, and held closed by a fastening at the side. On the end of the fuse is
placed a cap somewhat like a small cartridge shell containing a detonator.
In
The barrel being opened, the fuse with the cap on it is placed in the groove
which is thus exposed, and then the lid is shut down upon it and fastened.
closing the lid, a. sharp pin projecting from its groove penetrates the fuse and
prevents it from being blown out or displaced lengthwise, and another pin penetrates
the cap and fuse preventing the cap from being detached from the fuse. On pulling
the trigger, the hammer striking the cap fires it, and in order to prevent issue of
sparks or flame the hammer is inade with a recess which entirely encloses the end
of the cap when it strikes it.
The fuse being thus ignited, the barrel can be opened and the burning fuse with
the cap on it can be taken out with safety as the combustion which goes on within
the fuse has no communication with the surrounding atmosphere.
In some cases I dispense with the small cartridge applied to the end of the fuse,
providing the apparatus with a nipple for reception of an ordinary cap which being
fired by the hammer, ignites the end of the fuse, the hammer and nipple being so
arranged as to prevent issue of flame when the cap is struck.
Dated this 27th day of January 1892.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Igniting Safety Fuses.
I, HUBERT TREWEEKE ROBINSON of Camborne, Cornwall, Accountant, 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 apparatus for igniting safety fuses without exposing
Hame or sparks, thus avoiding the risks attending ignition of fuses for blasting in
an explosive atmosphere.
The apparatus for this purpose is in the form of a pistol having its barrel
divided longitudinally, the one half hinged to the other, so that it can be closed
on it like a lid, and held closed by a fastening at the side. On the end of the fuse
is placed a cap somewhat like a small cartridge shell containing a detonator.
In
The barrel being opened, the fuse with the cap on it is placed in the groove
which is thus exposed and then the lid is shut down upon it and fastened.
closing the lid, a sharp pin projecting from its groove penetrates the fuse and
prevents it from being blown out or displaced lengthwise and another pin penetrates
the cap and fuse preventing the fuse from being detached from the cap. On pulling

page_text: the trigger, the hammer striking the cap fires it, and, in order to prevent issue of
spark or flame, the hammer is made with a recess which entirely encloses the end
of the cap when it strikes it.
The fuse being thus ignited, the barrel can be opened and the burning fuse with
the cap on it can be taken out with safety, as the combustion which goes on within
the fuse has no communication with the surrounding atmosphere.
In some cases I dispense with the small cartridge applied to the end of the fuse,
providing the apparatus with a nipple for reception of an ordinary cap which being
fired by the hammer, ignites the end of the fuse, the hammer and nipple being so
arranged as to prevent issue of flame when the cap is struck.
Fig. 1 of the accompanying drawings is a perspective view of the pistol with the
barrel open, and the fuse, with the cap on it, placed in the groove.
Fig. 2 shows the pistol with the barrel closed and with the fuse in position for
being ignited.
A is the upper part of the barrel which is hinged to the lower part B and has
projecting from it the two sharp pins P which, when the barrel is closed, penetrate
the cartridge Caud the fuse F so as to prevent them from being displaced
longitudinally. The hammer H is made with a hollow to enclose the base of the
cap when it strikes it, as mentioned above.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that
what I claim is:
For igniting a fuse without exposing flame or sparks, a pistol having a
longitudinally divided barrel constructed and arranged substantially as herein
described.
Dated this 27th day of October 1892.
ABEL & IMRAY,
Agents for the Applicant.