Improvements in or Relating to Fire Extinguishers.
Year: 1898

page_text: Date of Application, 4th June, 1898-Accepted, 9th July, 1888
COMPLETE SPECIFICATION.
Improvements in or Relating to Fire Extinguishers.
A communication from CHARLES H. FORRESTER, of 113, Bleeker Street, City of
Toronto, in the County of York and Province of Ontario, Canada, Agent,
JAMES ALEXANDER MELDRUM, of 14, Earl Street, Toronto aforesaid,
Gentleman, FRANCIS GILBERT ANDERSON, of 95, Winchester, City of Toronto
aforesaid, Accountant, and MARION GERTRUDE ANDERSON, wife of Frederick
George Anderson, of 58,' Prince Arthur's Avenue, Toronto aforesaid,
Barrister
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, 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:—
The object of the invention is to devise a simple, cheap, and effective hand fire
extinguisher, and it consists essentially, of such details of construction and
arrangement as are hereinafter more specifically described and then definitely
claimed.
Figure 1, is a perspective section of the extinguisher in its normal position
Figure 2, 18 a prispective view, partly broken away, showing the extinguisher
in position for use
Figure 3, is a perspective detail of the acid bottle
In the diawings like letters of reference indicate corresponding parts in the
different figures
A, 18 a cylinder of sheet copper forming the body of the extinguisher. Fiom
side to side at the lower end of this, extends a bar B, forming a handle, by means
of which the extinguisher can be carried when leversed.
A bead is formed in the cylinder a short distance above its lower end, and a
concave bottom C, is fitted to the bead, and brazed into position.
D, is the convex top of the extinguisher, suitably fitted to a bead formed at
the outer end of the cylinder A, and brazed in position
An opening is formed in the top of the cap, and a flanged collar E, brazed
therein. This collar is threaded, and a cap F, provided with a hand wheel G,
is screwed thereon The collar E, has a small inwardly projecting flange a
formed thereon, upon which rests the flange 6 of the acid bottle H
This acid bottle 18 preferably corrugated as shown, to facilitate its breakage,
and is provided with a stopper I, comprising a cork centre c, and a sheet lead
covering d
After the cork is placed in position it is preferably sealed with sealing wax,
as indicated in Figure 1
An outlet pipe L, communicates with a hole formed in the cap D; the hole
being protected by a perforated screen e. A suitable hose and nozzle J, 18
connected with the outlet pipe L.
Normally resting on the bottom C, is a heavy lead ball K.
When the apparatus is ready for use the acid bottle contains the necessary

page_text: quantity of acid, while the body of the extinguisher is filled with solution of
carbonate of soda or any other solution which will generate carbonic acid gas
when mixed with the acid.
When the extinguisher is reversed, the ball falls upon the acid bottle, crushing
it, and liberating its contents, an immediate generation of carbonic acid gas
results, and the mixture of gas and water 18 directed upon the fire through the
hose
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent I declare that what I claim 18:-
First In a fire extinguisher, the combination of a cylinder, A, a bottom C:
a handle B, a stop D, having an internal flange formed on or connected thereto
with which a removable, flanged, sealed acid bottle is engaged; a screw cap F,
for the cover which engages the stopper of the acid bottle, an outlet pipe L,
communicating with an opening in the cover, a perforated screen e for the
opening, and a lead weight K, substantially as described and for the purpose
specified
Second In a fire extinguisher, the combination with a receptacle having an
internal projecting flange formed within an opening at the top, of a removable,
sealed acid bottle a flange to rest upon the said flange; a screw cover closing
the said opening in the top, an outlet pipe communicating with an opening in
the covel,
a perforated screen E, guarding said opening, and a lead weight K,
within the receptacle, substantially as described and for the purpose specified
Third In a fire extinguisher, the combination with a receptacle having an
internal projecting, flange formed within an opening at the top of a removable
sealed corrugated acid bottle, a flange to rest upon the said flange, a screw
cover closing the said opening in the top; an outlet pipe communicating with
an opening in the cover, a perforated screen E, guarding said opening; and a
lead weight K, within the receptacle, substantially as descibed and for the
purpose specified
Fourth In a fire extinguisher, an acid bottle provided with a stopper I, com-
prising a centre of cork, or other elastic material surrounded by sheet lead,
substantially as described and for the purpose specified.
Fifth A hand fire extinguisher substantially as described and shown in the
accompanying drawings
Dated this 4th day of June 1898