Improvements in Portable Chemical Fire Extinguishers.
Year: 1892

page_text: Date of Application, 10th Nov., 1892-Accepted, 31st Dec., 1892
COMPLETE SPECIFICATION.
Improvements in Portable Chemical Fire Extinguishers.
We, ISRAEL LEWIS CARR, of the City of Toronto, in the Province of Ontario,
in the Dominion of Canada, Chemical Fire Extinguisher Manufacturer, and
GEORGE WELLINGTON WILLIAMS, of the City of Ottawa, in the Province of
Ontario, in the Dominion of Canada, Insurance Agent, do hereby declare the
nature of our invention for "IMPROVEMENTS IN PORTABLE CHEMICAL FIRE
EXTINGUISHERS," and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
The invention has for its object to retain in the extinguisher all the gas
generated by commingling the chemicals until all the liquid has been expelled
under pressure of the gas; to prevent deterioration of the chemicals by keeping
them separately in air-tight compartments, and to dispense with the requirement
and use of a hose.
The invention consists in certain features of construction and combination of
parts, as will be hereinafter described and set forth in the claims.
Figure 1, is a vertical section of the fire extinguisher, and Figure 2, is a section
on line X X.
A, is the outer cylindrical vessel or casing of the extinguisher enclosing a glass
or non-corrosive metal flask B, containing a chemical fluid, and said flask has at
top a neck C, eccentrically located. The neck C, is closed by a hollow glass bulb
or stopper D, which contains an acid, and said stopper after being charged with the
acid has the orifice hermetically sealed by fusing the glass. The stopper when
inserted in said neck is cemented therein to prevent evaporation of the liquid in the
flask and to prevent the stopper loosening. The neck C, has internally around the
lower circumferential edge, projections or lugs E, against which the stopper bears,
said projections facilitating breakage of the stopper into small pieces, to clear the
neck, and prevent larger pieces stopping the outflow.
The vessel A, is longer than the flask B, and between the top of the vessel and
the top of the flask is a divisional air-tight chamber G, which is utilized for
stowage of the dry chemical G', and the neck C, of said flask discharges into said
chamber when the extinguisher is inverted and the stopper D, broken for use in
extinguishing a fire.
H, is a conduit within said chamber G, and preferably located around the
circumference and secured to the vessel A, for permanency; said conduit near the
neck C, has a perforated inlet orifice covered by a strainer H¹.
J, is the discharge cock of the extinguisher, said cock inserted through the wall
of the vessel A, and connecting with the conduit H, at a point farthest from the
inlet or strainer H', so that when the extinguisher is inverted for use and held
inclinedly, and the stopper D, broken, the strainer will be submerged, and the gas
generated by commingling the chemicals will rise into the flask B, and force the
liquid therein through the neck C, chamber G, conduit H, and cock J, for
extinguishing a fire, and said pressure or force will not be abated until the liquid in
the chamber G, is exhausted, as the gas is prevented from escaping through the
submerged strainer until the exhaustion of said chamber is effected. When the
strainer H', is submerged, the liquid in chamber G, will stop off or seal the
entrance to the conduit H, and prevent the escape of gas from the extinguisher,
until the gas has driven out the liquid, so that none remains in said chamber, as
waste.
In the top of the vessel A, directly over the stopper D, is a screw plug L,
having a break pin I, surrounded by a packing, so that by driving the pin by a

page_text: blow of the hand, the stopper D, will be broken in small pieces, and the chemicals
will commingle and start operation of the extinguisher, as described.
K, is a handle at the end of the vessel A, for holding and carrying the
extinguisher when inverted or otherwise.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed; we declare that
what we claim is :-
1. In a portable chemical fire extinguisher, the combination of the flask B,
containing a liquid and having a neck C, at one end eccentrically located, a hollow
fragile stopper D, containing an acid and cemented in said neck, a vessel or
casing A, enclosing said flask and stopper and having a plug J, provided with a
break pin I, adapted to break said stopper, an air-tight chamber G, intervening the
top of said vessel and flask and containing a dry chemical, a conduit H, within said
chamber, said conduit having an inlet close to said neck and provided with a
strainer H, and an outlet cock J, in said conduit at a point farthest from said neck
and strainer, and passing through the wall of said vessel, whereby the inlet to
the conduit will be submerged when the extinguisher is inverted and the stopper
broken, to prevent escape of gas generated by the commingling chemicals, and the
inlet to said conduit remains submerged until the gas has been exhausted from the
extinguisher.
2. In a fire extinguisher, the combination with the exterior vessel A, provided
with a break pin I, of an interior flask B, provided with a hollow stopper D,
a divisional chamber G, intervening the top of said vessel and flask, and a
conduit H, within said chamber and provided with a discharge cock J, as set
forth.
3. In a fire extinguisher, the combination of the flask B, having a neck C, the
hollow fragile stopper D, cemented in said neck, and the exterior vessel A, having
a divisional chamber G, at the top of said flask for stowage of chemicals separately
in air-tight compartments, to prevent deterioration, as set forth.
4. In a fire extinguisher, the combination with the exterior vessel A, having a
break pin I, of the flask B, having a neck C, eccentrically located in the end,
a hollow stopper D, inserted in said neck, and a conduit H, in a chamber G, inter-
vening the top of said vessel and flask, and provided with a discharge cock J, as
set forth.
5. A portable chemical fire extinguisher having a divisional chamber G, inter-
vening one end of an exterior vessel A, and an interior flask B, said flask having
an eccentrically located neck C, provided with projections or lugs E, a hollow
stopper D, bearing against said lugs, and a conduit tube H, within said chamber
and provided with a discharge cock J, as set forth.
6. The combination of the vessel A, having a break pin I, the flask B, having
an eccentrically located neck C, provided with lugs E, the hollow stopper D,
seated against said lugs, and the conduit H, within said chamber G, as set forth.
Dated the 20th day of October 1892.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicants.