Improvements in Chemical Fire Extinguishers.
Year: 1891

page_text: Date of Application, 18th Mar., 1891
Complete Specification Left, 18th Dec., 1891-Accepted, 23rd Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in Chemical Fire Extinguishers.
I, JAMES HASLAM of 359 Bury Road, Tonge near Bolton in the County of
Lancaster, Fire Engine Manufacturer, do hereby declare the nature of my said
invention to be as follows:-
This invention relates to improvements in chemical fire extinguishers and is
designed to prevent the carbonate or other solution contained therein being forced
out in case gas is generated in the same through heat or other causes when not
required for use, thereby removing a very objectionable nuisance, and its detrimental
effects on the outside of the extinguisher and its surroundings. To effect this I
provide the nozzle or outlet of the extinguisher with a cover of india-rubber or
other pliable substance mounted on a ferrule, ball, or other appliance attached to
a yoke or other connections that will allow of the same being pressed over the
said nozzle or outlet, provided with means for locking the same in position.. The
yokes and other connections can be pivoted to the nozzles or other convenient
parts of the extinguishers as desired or practicable. The end of the nozzle or
outlet can be concaved to maintain the elastic or pliable stopper in position over
If desired other arrangements may be employed, such as, covers or
caps provided with pliable seats, being secured by hinges and spring or other
catches, bayonet fastenings, screws, levers, and the like.
the same.
Dated the 17th March 1891.
EDMUND CHADWICK,
Agent.
COMPLETE SPECIFICATION.
. Improvements in Chemical Fire Extinguishers.
I, JAMES HASLAM of 359 Bury Road, Tonge near Bolton in the County of
Lancaster, Fire Engine Manufacturer, do hereby declare the nature of my 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 chemical fire extinguishers and is
designed to prevent the carbonate or other solution contained therein being forced
out in case gas is generated in the same through heat or other causes when not
required for use, thereby removing a very objectionable nuisance, and its detri-
mental effects on the outside of the extinguisher and its surroundings. To effect
this I provide the nozzle or outlet of the extinguisher with a cover of india-rubber
or other pliable substance mounted on a ferrule, ball, or other appliance attached
to a yoke or other connections that will allow of the same being pressed over the
said nozzle or outlet, provided with means for locking the same in position. The
yokes and other connections can be pivoted to the nozzles or other convenient
parts of the extinguishers as desired or practicable. The end of the nozzle or
outlet can be concaved to maintain the elastic or pliable stopper in position over
the same.
If desired other arrangements may be employed, such as, covers or caps
provided with pliable seats, being secured by hinges and spring or other catches,
bayonet fastenings, screws, levers, and the like.
Fig. 1 is a sectional elevation of a modification of my invention for sealing the
outlet nozzles of chemical fire extinguishers to prevent carbonate or other solution
contained therein being forced out in case gas is generated in the same through
heat and other causes when not in use.

page_text: 15 a plan of same.
Fig. 3 is a section through line A¹ B' in Fig. 1.
Fig. 4 is a sectional elevation showing the same open and ready for use in case
of fire, and
Fig. 5 is an outside elevation of a chemical fire extinguisher with my present
invention applied to seal the outlet pipe.
A represents a chemical fire extinguisher with my present invention applied or
fixed to the outlet pipe B. To the latter is secured, by soldering or other means,
the nozzle C, to which is hinged the arm or lever D by the pin or centre E. The
arm or lever D is fitted or provided with the india-rubber or other pliable cover G,
and, when closed as in Fig. 1, covers the outlet passage H, by which carbonate or
other solution contained in the chemical fire extinguisher A will be prevented
from being forced out in case gas is generated in the same through heat or other
causes when not in use. The arm or lever D with its, india-rubber or other pliable
cover G is locked or held firmly against the end of the nozzle C and over the
outlet passage H by the slotted arm or lever I; the latter being hinged to the
nozzle C by the pin or centre J.
Fig. 6 is a sectional elevation of another modification of my invention.
Fig. 7 is an outside end elevation of Fig. 6.
Fig. 8 is an outside elevation showing same open, and
Fig. 9 is a plan of Fig. 8.
In this arrangement or modification the nozzle C is provided with the pins or
centres E, on which are mounted the links or yoke D. One of the links forming
the yoke D is fitted with the pin K to secure the same in position on the nozzle C.
On the centre or pin L is mounted the ferrule M covered with the india-rubber or
other pliable cover G, by which the outlet passage H is closed or sealed as shown
in Fig. 6. The face or end of the nozzle C is concaved to the diameter of the
circular india-rubber or other pliable cover G, and is also provided with the lip or
projection N to prevent the said cover being pushed too far when pressed over the
end O. When it is desired to open the nozzle C the yoke is swivelled in the
direction indicated by the arrow in Fig. 8.
Fig. 10 is a sectional elevation of another modification of my invention, and
Fig. 1 is an outside elevation of same.
This arrangement or modification of my invention is in all respects similar to that
shown in Figs. 6 and 7 with the exception that the yoke is without the extended
end above the india-rubber or other pliable cover G.
Fig. 12 is a sectional elevation of another modification of my invention, and
Fig. 13 is an outside elevation of Fig. 12.
In this arrangement or modification the nozzle C is provided with the hinged
arm or lever D, being secured thereto by the pin or centre E. The arm or lever D
is fitted or provided with the india-rubber or other pliable cover G, and, when
closed as in Fig. 12, covers the outlet passage H. To the nozzle C is hinged the
slotted arm or lever 1 by means of the pin or centré J. The arm or lever I is
threaded to receive the screw P to lock or hold the arm or lever D with its
india-rubber or other pliable cover G against the end of the nozzle C and over the
outlet passage H. by which carbonate or other solution contained in the chemical
fire extinguisher A will be prevented from being forced out in case gas is generated
in the same through heat or other causes when not in use. When it is desired to
open or unseal the outlet passage H in the nozzle C it is effected by releasing the
screw P from the arm or lever D, which will allow of the slotted arm or
lever I being swivelled clear of the said arm or lever as shown in dotted lines.
Fig. 14 is a sectional elevation of another modification of my invention, and
Fig. 15 is an outside elevation of Fig. 14.
In this arrangement or modification the nozzle C is
centres E, on which are mounted the links or yoke D.
the yoke D is fitted with the. pin K to secure the same in
The upper end of the yoke D is threaded to receive
provided with the pins or
One of the links forming
position on the nozzle C.
the screw P carrying the

page_text: dished ring R in which is mounted the india-rubber or other pliable ring or
washer G. The outlet passage H is closed or sealed by pressing the india-rubber
or other pliable ring or washer G against the end of the nozzle C by means of the
screw P. When it is necessary to open or unseal the outlet passage H it is effected
by turning the screw P backwards until the dished ring R is raised sufficiently high
to allow the links or yoke D to swivel sideways.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In chemical fire extinguishers wherein water in solution with a carbonate or
other solution and an acid are employed the use of the hinged lever D, india-
rubber or pliable cover G, and the slotted arm or lever I in combination with the
nozzle C secured to the outlet pipe for the purpose specified, substantially as
described.
2. In chemical fire extinguishers wherein water in solution with a carbonate or
other solution and an acid are employed the use of the hinged yoke D, ferrule M,
and the india-rubber or pliable cover G in combination with the nozzle C secured
to the outlet pipe for the purpose specified, substantially as described.
3. Constructing the outer end of the nozzle C with a concaved surface and a
lip or projection for the purpose of locking and maintaining the india rubber or
other pliable cover G in position to seal or close the outlet passage, substantially
as described.
4. In chemical fire extinguishers wherein water in solution with a carbonate or
other solution and an acid are employed the use of the hinged lever D, india-
rubber or pliable cover G, slotted arm or lever I, and the screw P in combination
with the nozzle C secured to the outlet pipe for the purpose specified, substantially
as described.
5. In chemical fire extinguishers wherein water in solution with a carbonate or
other solution and an acid are employed the use of the hinged yoke D, screw P,
dished ring R, and the india-rubber or other pliable ring or washer G in com-
bination with the nozzle C secured to the outlet pipe for the purpose specified,
substantially as described.
Dated the 15th December 1891.
EDMUND CHADWICK,
Agent.