Year: 1895

page_text: Date of Application (in United Kingdom), 30th Sept., 1895
Complete Specification Left, 30th Sept., 1895-Accepted, 14th Dec., 1895
We, ROBERT HABERSHAM ELLIOTT, of Corner 13th Avenue and 21st Street,
South Highlands, Birmingham, Alabama, United States of America, Civil
Engineer, and JOHN BRUCE CARRINGTON, of the Village of Jasper, Walker
County, Alabama, United States of America, Civil Engineer, citizens of the
United States, 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 relates to improvements in means for placing the explosive
material in the proper position in the bore hole, and it consists in providing a
friable cartridge case adapted to contain the explosive material, which cartridge
case is, when loaded, pushed down to the desired position in the bore hole and is
there crushed; and the contents of the said cartridge are distributed accurately in
place.
Paper, flannel, or cloth cartridge cases are ordinarily used for this purpose, but
these bend under the blows of the rammer, and do not break up readily, thus
preventing that loose disposition of the explosive material which is desirable in
blasting.
In blasting in coal, soft rock, or loose material, powder of such an inferior grade
or so large a grain is used that where several of the flannel, cloth, or paper
cartridges, as ordinarily constructed are used, the simultaneous explosion of the
several charges which is necessary to produce the greatest effect is not obtained.
In practice we provide a cartridge case for the explosive material made partly of
flexible material, and partly of friable material, such as a compound cartridge case
made of friable clay, and of paper or like material.
While we specifically refer to clay and paper, any suitable friable material may
be used in place of the clay, and cloth or like material may be used as a substitute
for the paper.
Reference is had to the accompanying drawings in which the same parts are
indicated by the same letters throughout the several views:-
-
Fig. 1 represents an end view of one of our improved cartridge cases.
Figs. 2 and 3 represent perspective views of the parts composing the cartridge
case, shewn in Fig. 1.
Fig. 4 represents an end view of a modified form of cartridge case, and
Fig. 5 represents a perspective view of the same before being completed.
Referring particularly to Figs. 1 to 3, the cartridge case is made up of two
staves A, forming part of a circumference of a cylinder, which staves are connected

page_text: together by the strips B of paper, cloth, or like material which strips are glued to
the staves A as at 6. The ends of these strips are made to project beyond the ends
of the staves A, as at b, so that they may be bent over to form the completed and
closed end of the cartridge case.
In the form of device shewn in Figs. 4 and 5, there is but one stave A' which is
preferably approximately semi-cylindrical in shape, the opposite side of the cylinder
being closed in by the strip B, which is glued to the stave A', and is provided with
projecting ends, as has been already described with reference to Figs. 1 to 3.
In any of the hereindescribed forms of cartridge case, the explosive material is
inserted into the cartridge case and the ends thereof are closed. The completed
cartridge is then shoved down to the desired point in the bore holes, and the friable
material is crushed causing the contents of the cartridge to be released in the bore
hole at any point desired; these contents are then fired in the ordinary way.
It will thus be seen that the explosive material may be readily and conveniently
carried to the desired point, and then may be released in order to be employed in
the most effective way.
The advantages of the hereindescribed construction will readily suggest themselves
to any practical mind.
Having thus particularly ascertained and described the nature of our said
invention we declare that what we claim is :-
1. The construction, combination and arrangement of parts hereindescribed and
shewn in Figs. 2 and 3, of the drawings hereunto annexed.
2. The construction, combination and arrangement of parts hereindescribed and
shewn in Figs. 4 and 5, of the drawings hereunto annexed.
3. A cartridge case for use in conveying explosive material, which consists
partly of a friable material, and partly of a flexible material, substantially as
described.
4. A cartridge case for conveying explosive material, which consists partly of
friable clay, and partly of a flexible material, substantially as described.
5. A cartridge case for conveying explosive material, which consists partly of
a friable material, and partly of paper, substantially as described.
Dated this 28th day of September 1895.
G. J. CLARKSON,
Chartered Patent Agent,
Stockton-on-Tees, Agent for the Applicants.