Improvements in and relating to Fire Extinguishers.
Year: 1899

page_text: Date of Application, 26th Oct., 1899-Accepted, 2nd Dec., 1899
COMPLETE SPECIFICATION.
Improvements in and relating to Fire Extinguishers.
I, FRANK STEELE BRIGHT, of 130, B Street, N.E., in the City of Washington,
District of Columbia, United States of America, Lawyer, do hereby declare the
nature of my invention, and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
Fire extinguishers in which an alkaline solution and a bottle of acid, having
means by which the said acid may be released and a gas pressure developed, are
well known. The present invention contains certain improvements in the con-
struction, by which such apparatus is rendered simple and secure.
Figure 1 is a vertical section of a fire extinguisher according to this invention.
Figure 2 is a plan of the same.
Figure 3 is a cross section, below the cover.
Figure 4 a detail elevation of the bottle cage and broken section of casing.
The receptacle or casing A, is a strong metallic vessel, preferably cylindrical,
and having a screw-thread to attach screw-cap or cover B. The inside of the
cap has an annular recess or seat for a rubber ring C. The central part of
this cover has a boss D, in which the tubo F and nozzle E are screwed, so
as to form a pipe extending to near the bottom of vessel A, and terminating in
the nozzle, which is screwed into the outside of the cover.
At the bottom of the tube F', and attached to a screw thread, there is a per-
forated strainer (, the holes in the same being preferably in the lower end or
side thereof.
At one side of the receptacle A there is a strong metallic cage H, attached
to the inner face of the wall by rivets I. This cage H has openings in its sides
and a screw K extends through the side of vessel A and a boss L. thereon, which
boss is held by rivets 1. A glass bottle M has a ground glass or other non-
corrodible stopper N. The bottle M, when placed in cage H, neatly fits therein,
and the elastic ring C holds the stopper firmly in place, so that it cannot escape,
and also seals the cover, to prevent gas escape. The side H₁ of the cage opposite
the screw is a strong bar, and the glass bottle fits neatly between this bar and
the screw K, so as to be crushed or broken when the screw is turned in.
The bottle M contains an acid solution, or other chemical substance which
when commingled with the liquid in vessel A will develop a gas pressure.
When the parts are assembled, as in Figure 1, the vessel A being nearly filled
with an alkaline or other liquid, and the glass bottle M containing a substance
which when mingled with such liquid will yield a pressure of gas, if the screw K
be turned in it will necessarily break the glass bottle M, and release its contents.
These contents, mixing with the fluid in vessel A, develop a gas pressure. The
pressure of gas on the top of the liquid in vessel A, forces the liquid through
strainer G, up pipe F, and out of nozzle E with great force, if proper chemicals
are used, and will check or extinguish a fire when properly directed.
The cage H may be enclosed in a wire gauze screen K' to prevent broken glass
from falling into the main vessel.
By removing the cover B the cage H is readily accessible for the application

page_text: of a new bottle, as well as to refill the casing. The rubber gasket C forms a
gas seal, as well as a means for retaining the stopper in bottle M.
The boss L on the outside of vessel A makes a packing for screw K, and if
desirable it may be a stuffing box:
A ring or hook T forms a means for suspending the entire device, so that it
may be in convenient position for use.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is: :―
1. The body or casing having cover with an elastic packing ring, and a
frangible bottle in a cage under said ring so that the stopper is held down by
said ring, and a screw passing through the casing to break the bottle.
2. The casing having a cage secured to its inner surface and a boss secured
to the outer surface by rivets passing through the casing, a screw passing through
the boss into the cage, and a covering of wire gauze for the bottle in the cage.
3. The casing with screw-threaded cover having interior boss, the nozzle
screwing into the outer face of the cover and the pipe screwing into the inner
face and extending downwardly and having a perforated filter secured at its
bottom end.
Dated this Ofth day of October 1800
JENSEN & SON,
77, Chancery Lane, London, W.C.,
Patent Agents.