Improvements in or Connected with Cartridges for Blasting.
Year: 1888

page_text: Date of Application, 19th Oct., 1888
Complete Specification Left. 11th July, 1889-Accented 17th Aug
1889
PROVISIONAL SPECIFICATION.
Stasting.
Improvements in or Connected with Cartridges for Blasting.
1, FRANCIS JAMES SHAND, of 149 West George Street, Glasgow, in the County of
Lanark, North Britain, Merchant, do hereby declare the nature of this Invention to be
as follows, that is to say :-
My said Invention has for its object to prevent, or greatly diminish the liability of,
the communication of flame from an exploding blasting cartridge to ignitable gas or
dust which may be near the place of a blast; and for this purpose I enclose one or
more blasting cartridges, which may be of any suitable kind and charged with any
suitable explosive, in a casing or cell composed of a suitable salt which is liquefiable
by heat and is of a kind to extinguish the flame of the explosive cartridge. Any salt
may be used which when dry or crystallised contains water of crystallisation, those
containing a large proportion of water of crystallisation being preferable. Ordinary
soda crystals (carbonate of soda) may be satisfactorily used; and may be put into the
desired form in any convenient way. The salt may be run in a melted state into a
mould in which it may crystallise or solidify, or the salt, in a crushed state, may be
compressed into the desired form by means of dies and presses. The salt casing
or cell may be made of various forms to suit the cartridge and bore or cavity in
which it is to be placed; and it may be coated with paraffine or other waterproof
substance. For ordinary blasting purposes the casing or cell will be in the form of a
cylinder with one end closed, and with the interior of a size-one inch in diameter for
example to receive the explosive cartridge and the outside diameter being-
a half inches for example-such as to fill the bore. When the explosive cartridge has
been inserted the casing or cell is closed with a plug which may be made of the same
salt or of any other suitable material--the fuse or conducting wires being passed
through a hole in the plug or through a groove formed in its side.
Dated this Eighteenth day of October 1888.
-one and
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in or Connected with Cartridges for Blasting.
I, FRANCIS JAMES SHAND, of 149 West George Street, Glasgow, in the County of
Lanark, North Britain, Merchant, 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 to prevent, or greatly diminish the liability of,
the communication of flame from an exploding blasting cartridge to ignitable gas or
dust which may be near the place of a blast; and for this purpose I enclose one or
more blasting cartridges, which may be of any suitable kind and charged with any
suitable explosive, in a casing or cell composed of a suitable salt which is liquefiable
by heat and is of a kind to extinguish the flame of the explosive cartridge. Any salt
may be used which when dry or crystallised contains water of crystallisation, those
containing a large proportion of water of crystallisation being preferable. Ordinary
soda crystals (carbonate of soda) may be satisfactorily used; and may be put into the
desired form in any convenient way. The salt may be run in a melted state into a
mould in which may crystallise or solidify, or the salt, in a crushed state, may be
compressed into the desired form, by means of dies and presses. The salt casing or
cell may be made of various forms to suit the cartridge and bore or cavity in
which it is to be placed and it may be coated with paraffine or other waterproof
[D7]

page_text: substance. For ordinary blasting purposes the casing or cell will be in the form of a
cylinder with one end closed, and with the interior of a size-one inch in diameter for
example to receive the explosive cartridge and the outside diameter being-one and
a half inches for example-such as to fill the bore. When the explosive cartridge has
been inserted the casing or cell is closed with a plug which may be made of the same
salt or of any other suitable material-the fuse or conducting wires being passed
through a hole in the plug or through a groove formed in its side.
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 1
claim is :-
The enclosing of one or more blasting cartridges in a casing or cell composed of
carbonate of soda or other suitable salt which is liquefiable by heat and is of a kind
to extinguish the flame of the explosive cartridge or cartridges, substantially as and
for the purposes hereinbefore described.
13
CT11000
EDMUND HUNT,
Applicant's Agent.