An Improved Compound for use in Extinguishing Fires.
Year: 1891

page_text: Date of Application, 5th May, 1891
Complete Specification Left. 10th Aug., 1891-Accepted, 12th Sept., 1891
PROVISIONAL SPECIFICATION.
An Improved Compound for use in Extinguishing Fires.
I, MAX EBERHARDT, of Lucerne in the Republic of Switzerland, Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to a compound designed for use in extinguishing fires.
For obtaining this compound I mix with 200 litres of water, in the proportions
stated, the following substances.
Chloride of soda
Burnt sulphate of alum
Bicarbonate of soda
-
-
-
3 kilogrammes.
Liquid silicate of soda of 36 degrees Baumé 5
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This compound is put in a well-cleaned petroleum barrel filled with 100 litres of
water. By means of a broom the mixture is then agitated in order that the isolated
parts shall be dissolved more rapidly. As soon as this has taken place the mixture
is allowed to stand and the chemical action which commences is carefully observed.
First small white points are seen to rise, which seem to increase every moment and
are gradually becoming larger, and which, by reason of the great reciprocal
attraction, finally obtain a pasty form. At this point it is needful to add the
remaining 100 litres, stirring continually. Then the compound is finished.
The compound must be examined and agitated every three months, the water
evaporated being replaced by fresh water.
Dated this 5th day of May 1891.
"
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Compound for use in Extinguishing Fires.
I, MAX EBERHARDT, of Lucerne, in the Republic of Switzerland, Engineer,
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:-
This invention relates to an improved compound for use in extinguishing fires,
the said compound being composed of chloride of soda, burnt alum, bi-carbonate of
soda, liquid silicate of soda of a density of 36 Beaumé, and water.
The proportions which are found to answer the purpose best are as follows:-
COMPLETE SPECIFICATION.
An Improved Compound for use in Extinguishing Fires.
I, MAX EBERHARDT, of Lucerne, in the Republic of Switzerland, Engineer,
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:-
This invention relates to an improved compound for use in extinguishing fires,
the said compound being composed of chloride of soda, burnt alum, bi-carbonate of
soda, liquid silicate of soda of a density of 36 Beaumé, and water.
The proportions which are found to answer the purpose best are as follows.
Chloride of soda
Burnt alum
-
Bi-carbonate of soda
Liquid silicate of soda
Water
-
-
-
3 kilogrammes.
5
200 litres.
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In mixing these ingredients great care has to be exercised to prevent the mass
from solidifying. A method which is advantageously adopted for preventing this
O is as follows, videlicet:-The several ingredients with half the quantity of water are
placed in a suitable tub or vessel and subjected to agitation in order that the solid
ingredients shall be dissolved as rapidly as possible. When the solution is complete
the mixture is allowed to stand when a chemical action commences, this chemical

page_text: action being noticeable by reason of the fact that small white points and bubbles
commence to rise and then to increase in number and to become gradually larger
until they finally assume a pasty form. The remaining quantity of the water is
then added during a continuous stirring in order to finish the preparation of the
compound.
In cases where it is necessary for the compound to remain standing for long
periods it should be periodically examined and agitated, say, once every three
months, the water which may have evaporated being also replaced by fresh water.
The composition or compound prepared as above described may be applied by
any suitable means such, for instance, as a hand-pump and it is found in practice
that when applied it forms a film or coating over the burning materials which not
only extinguishes the flames but prevents re-ignition. In some cases it may be
employed in vessels that are capable of being broken when thrown into or upon
matters in a burning state.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed declare that what
claim is,
1. The improved fire extinguishing compound hereinbefore described consisting
of the ingredients mentioned combined substantially in the proportions set forth.
2. The manufacture of the improved fire extinguishing composition or compound,
substantially in the manner set forth.
D
1041 1
1001
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.