Improvements in the Manufacture of Cases for Mining Cartridges.
Year: 1888

page_text: Date of Application, 20th Oct., 1888
Complete Specification Left, 22nd July, 1889-Accepted, 24th Aug., 1889
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Cases for Mining Cartridges.
We GEORGE PROCTER of Bartholomew Road, Kentish Town, in the County of
Middlesex, Manager of Works, and GEORGE CLULOW of 51 Belsize Avenue in the
same County, Manufacturer do hereby declare the nature of this invention to be
as follows:-
-
Our invention has reference to cases for mining cartridges, and it consists in manu-
facturing them in metal as hereinafter described.
We take a disc of any suitable metal, such for example as tin, or lead, or any
suitable alloy, and by means of a forcer and matrix we draw a tube of the length
required for the case. The tube thus drawn is open at the one end and closed at the
other. The matrix employed is of such form as to produce upon the closed end an
external hollow, nipple-like protuberance (but without a channel through it). We
provide the open end of the tube with a cap, which, after the cartridge or charge ha
been inserted into the tube should be suitably secured.
Metallic cases made as above described, and containing their blasting charge, can
be safely transported from place to place. When it is required to use one it is only
necessary to cut off the protuberance above described, which can be readily done with
a knife, and then to insert a fuzo through the aperture thus made in the end of the
This protuberance is an important feature of our improved case.
case.
For long cartridge cases, we join two cases made as above described, and in order
to effect this we attach a ferrule, or wide collar to the end of the one case to receive
the end of the other; or we insert one end of the case into the other, the latter being
enlarged to a diameter which renders this practicable.
Although we have stated that we make our metallic cases by drawing them from a
disc of metal, this being the most economical and convenient mode of manufacture,
the metallic cases can be otherwise made, provided they comprise our nipple-liko
protuberance which has to be cut off to allow of the introduction of the fuze.
1000
J. C. MEWBURN,
169, Fleet Street, London, Patent Agent.
· COMPLETE SPECIFICATION.
Improvements in the Manufacture of Cases for Mining Cartridges.
We, GEORGE PROCTER of Bartholomew Road, Kentish Town in the County of
Middlesex, Manager of Works and GEORGE CLULOW of 51 Belsize Avenue in the same
County, Manufacturer, 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 :-
Our invention has reference to cases for mining cartridges, and it consists in manu-
facturing them in metal as hereinafter described.
We take a disc of any suitable metal, such for example as tin or lead, or any
suitable alloy, and by means of a forcer and matrix we draw a tube of the length
required for the case. The tube thus drawn is open at the one end and closed at the
other. The matrix employed is of such form as to produce upon the closed end an
external, hollow, nipple-like protuberance, (but without a channel through it). We
provide the open end of the tube with a cap, which, after the cartridge or charge has
been inserted into the tube should be suitably secured.
Metallic cases made as above described and containing their blasting charge can be
safely transported from place to place. When it is required to use one it is only

page_text: necessary to cut off the protuberance above described which can be readily done with
a knife and then to insert a fuze through the aperture thus made in the end of the
This protuberance is an important feature of our improved case.
case.
Fig. 1 of the accompanying drawings is a side view partly in section of a cartridge
case manufactured according to our invention. Figs. 2 and 3 are views respectively.
of the two ends of same. a is the tube drawn from a disc of metal with the end b
closed and the other end open; the substance of the closed end is preferably left:
thicker than the body of the tube. c is the hollow nipple like protuberance on the
end b. d is the cap used to close the other or open end of the tube after the cartridge
or charge has been inserted. When it is required to use the cartridge the pro-
tuberance c is cut off on the liner and a fuze is inserted through the aperture thus
made in the end of the case.
For long cartridge cases we join two cases made as above described, and, in order
to effect this we attach as shown at e Fig. 4: a ferrule or wide collar to the end of
the one case to receive the end of the other; or as shown in Fig. 5 we insert the .end
of the one case into the other case the latter being enlarged to a diameter which
renders this practicable as shown at Fig. 5.
Although we have stated that we make our metallic cases by drawing them from a
disc of metal this being the most economical and convenient mode of manufacture, the
metallic cases can be otherwise made, provided they comprise our nipple-like
protuberance which has to be cut off to allow of the introduction of the fuze.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A métallic mining cartridge case having a protuberance adapted to be cut off so
as to leave an aperture for the insertion of a fuzo, substantially as hereinbefore
described.
2. The manufacture of cases for mining cartridges as hereinbefore described.
20
1000
109
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Patent Agent.