Improvements in Firing Mining Cartridges and in Apparatus for use therewith.
Year: 1892

page_text: Date of Application, 10th Nov., 1892
Complete Specification Left, 8th Sept., 1893-Accepted, 4th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Firing Mining Cartridges and in Apparatus for use
therewith.
We, ROBERT WRIGHTSON SEDGWICK of 78 Dickinson Crescent, Gosforth,
Newcastle-on-Tyne in the County of Northumberland Mining Engineer and
CARL LAMM of 4 Chapel Walks Manchester in the County of Lancaster, Director
do hereby declare the nature of this invention to be as follows:-
This invention relates to the firing of detonators for high explosives without the
aid of fuze and by placing the detonator into the cartridge after the hole is
stemmed, whereby all danger of the premature discharge of the detonator is
avoided and consists of using a "detonator rod," which apparatus is composed of
two parts the first a cylindrical tube from 3 to 4 feet or more in length one end of
which is of smaller diameter than the other which smaller end has a shoulder.
Into this tube is placed the second part, a rod, with a flat head, which rod works
in a slot made in the end of the tube. On the other end of this rod is a button
and spring which keeps the "head" down in the slot.
The mode of applying this invention is as follows:-
A pricker is inserted into the explosive cartridge, placed in the hole and
stemmed. When the stemming is completed the pricker is withdrawn. The
detonator is then placed on the small end of the "detonator rod" and inserted into
the explosive cartridge through the pricker hole. The button at the end of the
rod is then pressed which forces the detonator off the end of the tube and leaves
it in the cartridge. The rod is withdrawn and the detonator exploded by means of
a squib or other contrivance.
Dated this 7th day of November 1892.
ROBERT WRIGHTSON SEDGWICK.
CARL LAMM.
COMPLETE SPECIFICATION.
Improvements in Firing Mining Cartridges and in Apparatus for use
therewith.
We, CARL LAMM of 4 Chapel Walks Manchester in the County of Lancaster
Director, and ELIZABETH SEDGWICK, Executrix and Widow of the late
Mr. Robert Wrightson Sedgwick of 78 Dickinson Crescent Gosforth Newcastle-
on-Tyne in the County of Northumberland, Mining Engineer, 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 the firing of detonators for high explosives without the
aid of fuze and by placing the detonator into the cartridge after the hole is
stemmed, whereby all danger of the premature discharge of the detonator is
avoided and consists of using a "detonator rod" which apparatus is composed of
two parts the first a cylindrical tube from 3 to 4 feet or more in length one end of
which is of smaller diameter than the other which smaller end has a shoulder.
Into this tube is placed the second part, a rod, with a flat head, which rod works
in a slot made in the end of the tube. On the other end of this rod is a button
and spring, which keeps the "head" down in the slot.
The mode of applying this invention is as follows:
A pricker is inserted into the explosive cartridge, placed in the hole and
stemmed. When the stemming is completed the pricker is withdrawn. The

page_text: detonator is then placed on the small end of the "detonator rod" and inserted into
the explosive cartridge through the pricker hole. The button at the end of the
rod is then pressed which forces the detonator off the end of the tube and leaves it
in the cartridge. The rod is withdrawn and the detonator exploded by means
of a squib or other contrivance. The detonator rod can also be used as a pricker.
keeping the detonator on until the stemming is completed.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
First. The method of firing detonators for mining cartridges without using fuze
consisting in introducing the detonator into the cartridge by using a detonator-rod,
substantially as and for the purpose set forth.
Second. For placing the detonator safely into the cartridge after the hole is
stemmed by withdrawing the pricker which is inserted previous to the stemming
and placing through the pricker hole in the charge the detonator by means of a
detonator rod composed of a cylindrical tube and in which a rod with flat head
works in a slot and with a button and spring, substantially as and for the purpose
set forth.
Dated this 7th day of September 1893.