Year: 1897

page_text: Date of Application, 22nd May, 1897
Complete Specification Left, 3rd Feb., 1898--Accepted, 5th Mar.,
1898
I, FREDERICK RENDER, of Albert Street, Manchester, in the County of Lancaster,
Corn Miller, do hereby declare the nature of this invention to be as follows:
-
This invention relates to cartridges for mining purposes composed of any of the
nitrate of ammonia compounds employed for explosive purposes.
In carrying out the invention the cartridge is constructed or packed denser or
more hard at the outside and edges than at the centre which renders it capable of
being exploded by a detonator of a lower power or force.
In order to secure the detonator in position I attach to or imbed in the interior
of the cartridge a piece of string or cord (or the equivalent thereof) the end or ends
of which project to be utilized in securing the detonator in position when applied
to the cartridge and so prevent the miss-fire of shots during blasting operations.
The cartridge is packed in or covered with a casing of a waterproof paper.
Dated this 21st day of May 1897.
I, FREDERICK RENDER, of Albert Street, Manchester, in the County of Lancaster,
Corn Miller, 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 cartridges for explosives, more particularly to those
composed of any of the nitrate of ammonia compounds capable of being employed
as explosives and adapted for mining purposes.
The explosive material is packed into the cartridge case by a suitable machine
with a rotating screw or other feeding device, the material preferably being packed
less dense at the centre than towards the exterior.
The cartridge case is made from paper (or other suitable material) and to one end
is attached a piece of string or cord by which the detonator and fuse are secured
in position.
It will be fully described with reference to the accompanying drawings.
Fig. 1. Perspective view of cartridge case in readiness for filling.
Fig. 2. Perspective view of wad C showing attachment of string B.
Fig. 3. Longitudinal section of cartridge case.
Fig. 4. Longitudinal section of cartridge showing fuse inserted for firing and
secured to cartridge by string R

page_text: In constructing the cartridge case A the paper is rolled into cylindrical form in
the usual way such as upon a roller said roller having a hole about 3 of an inch
diameter through its central axis to admit air to the upper end and prevent collapse
of the case when the roller is withdrawn. At one end is inserted the prepared
wad C of cardboard or other suitable material to which the cord or string B pre-
ferably looped has been attached. The edge of the paper is folded over the outer
side of the wad C and a gummed or pasted label, ticket or the like of circular form
is pressed over to hold the wad and case in position.
The wad C is made of circular shape and is preferably formed with one, two or
more slits such as c round which the ends of the cord or string B are doubled to
securely retain it in position a pasted or gummed paper or ticket being placed over
to secure the cord B in position and prevent it being removed. In the centre of the
wad C (or in other convenient place) is punched a hole d through which the
detonator D is inserted into the interior of the cartridge. This hole is covered on
both sides by the gummed labels or tickets which can be easily broken through by a
wooden skewer or the like.
Instead of cord, wire or other suitable material may be employed for the same
purpose.
The cartridge as herein before stated is filled by a machine and the open end
closed in the usual way. When desired for use, the pasted or gummed labels or
tickets are broken through opposite the punched hole d the detonator and fuse D
are inserted and the cartridge is securely attached thereto by the string B which is
for the purpose and is also of service in manufacture.
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:
t
*.
1. A cartridge for mining purposes provided with a length of string or cord
securely attached to one end for the purpose of securing it to the detonator sub-
stantially as described.
2. The combination with a cartridge case of a length of string secured at one end
substantially as described and shown.
3. A cartridge constructed substantially as and for the purpose described and
shown.
Dated this 2nd day of February 1898.
WM. P. THOMPSON & Co.,
Manchester, Liverpool and London, Patent Agents.