Improvements in the Construction of Water or Flame Extinguishing Cartridges for Mining and other like Purposes.
Year: 1891

page_text: Date of Application, 17th June, 1891-Accepted, 25th July, 1891
COMPLETE SPECIFICATION.
Improvements in the Construction of Water or Flame Extinguishing
Cartridges for Mining and other like Purposes.
We, JAMES JONES of 12 Dean Street, Bolton, Collier, BENJAMIN JONES. of
15 Merehall Street, Bolton, Engineer, THOMAS CARTWRIGHT of 125 Glynne
Street, Farnworth near Bolton, Miner, all in the County of Lancaster, THOMAS
JOHN PRICE of The Gardens, Runcorn, Manager, and JOSEPH JAMES SPEAKMAN
of Stanley Villas, Greenway Road, Runcorn, Manufacturing Chemist, both in the
County of Cheshire, do hereby declare the nature of our said 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 improvements in the construction of water or flame
extinguishing cartridges for the purposes of blasting or rending coal, rock, and
other minerals or substances, and for any other useful purposes, in which it is
desirable to extinguish the flame arising from the combustion of the explosive
charge, in use in coal and other mines or quarries, and consists of an improved
form, combination, and construction of water cartridge in which the explosive
charge is immersed and held in water or other extinguishing fluid or compound
which will immediately extinguish the flame arising from the combustion of the
same without the use of a special charge case or central supports. In this our
invention the explosive charge is placed in the cartridge case and rests on the
bottom of same, being surrounded with water or other flame extinguishing fluid or
compound except that portion resting on or in contact with the cartridge case.
Fig. 1 is a longitudinal sectional elevation of our improved water or flame
extinguishing cartridge when charged and placed in the bore hole preparatory to
firing.
Fig. 2 is a front outside end view of same.
Fig. 3 is a front outside end view with clips to secure the plug or seal.
Fig. 4 is a sectional plan of mouth end of cartridge case showing clips bent over
plug or seal, also in dotted lines their position before being bent.
Fig. 5 is a section through line A B in Fig. 1.
Figs. 6 and 7 are transverse sections of cartridge case showing explosive charge
of various forms provided with convexed surfaces to enable the same to sit or rest
on the bottom side of the said cartridge case.
Fig. 8 is a transverse section of cartridge case showing explosive charge with
each side convexed to the internal diameter of the cartridge case to ensure of the
same sitting or resting on the bottom of case to exclude water or other liquid from
the underside.
Fig. 9 is a part longitudinal sectional elevation showing external cap with clips
to retain or secure plug or seal in position, and
Fig. 10 is an outside front view of Fig. 9.
In all the figures the same letters are employed to indicate corresponding
parts.
The cartridge case C is constructed of metal or other suitable substance or
material which will be sufficiently rigid to prevent crushing during the operation
of fixing and tamping. In the cartridge case C is placed the explosive charge D
provided with the detonator G and connected by the wire or wires H with the
electric battery for firing the charge D. The explosive charge D can be circular
in sectional form as shown in Fig. 5, or provided with a convexed surface or
surfaces corresponding with the internal diameter of the cartridge case C as shown
in Figs. 6, 7, and 8, to allow the same to sit or rest on the bottom side of the same
and thus prevent the charge being completely surrounded by water or flame

page_text: extinguishing liquid. By placing the explosive charge D on the bottom of the
cartridge case C a greater head of water or flame extinguishing liquid is obtained,
which must increase the efficiency of the same to thoroughly extinguish the flame
when the charge explodes. After the explosive charge D has been placed in the
cartridge case C the latter is filled with water or other flame extinguishing fluid or
compound, and is sealed or closed by the plug or bung I being pressed or driven
into the open end of the case C. The plug or bung I can be of cork, wood, com-
position, or other substance or material that will make a tight joint when forced or
driven into the mouth of the cartridge case C. The plug or bung I is provided
with a groove or grooves K for the passage of the wire or wires H. Owing to the
wire or wires H passing through the groove or grooves K on the outside of the
plug or bung I the latter can be driven firmly into the mouth end of the cartridge
case C, and which also facilitates the driving or pushing of the latter into the bore
hole without interfering with or damaging the said wires. To further secure the
plug or bung I in the mouth of the cartridge case C the latter can be provided
with the clips L secured thereto in any convenient manner, and which can be bent
over the plug or bung I, as shown in Figs. 3 and 4, after the latter has been driven
into the mouth of the cartridge case C. If desired the clips L can form part of
the ring M, the latter being secured outside the cartridge case C as shown in
Figs. 9 and 10. N is the usual stemming clay or earth with which it is tamped for
holding the cartridge case and its contents in position in the bore hole.
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. The arrangement, construction, and combination of parts composing our improved
water cartridge, consisting of the rigid outer case C for holding water or other
flame extinguishing fluid or compound and the blasting charge D immersed therein,
the latter lying on the bottom side of the case C when fixed in bore hole so as not
to be completely surrounded by water or other flame extinguishing fluid or com-
pound, the whole being sealed by the plug or bung I, as herein before described
and as illustrated in the annexed drawings.
2. In a water cartridge, the use of an explosive charge with one or more sides
convexed to the internal diameter of the cartridge case to ensure the same lying
on the bottom side of case when fixed in bore hole, and to prevent it being com-
pletely surrounded by water or other flame extinguishing fluid or compound,
substantially as described and shown.
Dated the 13th June 1891.
EDMUND CHADWICK,
Agent.