Improvements in the Manufacture of a Liquid applicable for Impreg- nating Articles to Render them Non-flammable, and also for Fire Extinguishing purposes.
Year: 1898

page_text: Date of Application, 7th Apr., 1898-Accepted, 18th Feb., 1899
COMPLETE SPECIFICATION.
Improvements in the Manufacture of a Liquid applicable for Impreg-
nating Articles to Render them Non-flammable, and also for Fire
Extinguishing purposes.
We, JOHANNES STOCKER, Chemist, HERMANN ZANDER, Gentleman, and
WILHELM DÖBLIN, Gentleman, all of Rathenow, in the German Empire, 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 the manufacture of a liquid for the extinguishing of
fire or the prevention of same by impregnation, by which is obviated the risk
of damage from fire either to a person directly attacked or to entire buildings,'
such as dwelling houses, warehouses and manufactories. The liquid can be
applied to all inflammable or combustible materials such as the finest dress materials
curtains, draperies, theatrical costumes,and decorations of all kinds by impreg-
nation and for the extinguishing of fires either large or small the liquid renders
very important services when mixed with water. For instance, if a person's
hands are moistened with the liquid he can handle burning objects smouldering
and burning embers or the like with uncovered hands and stifle the flames without
feeling the heat or being burnt.
The preparation is also of the greatest utility when it is necessary for any
reason to enter burning rooms. In such cases it is merely requisite to thoroughly
moisten the clothing, face, hair and hands with the liquid and the hair will
not be singed or the clothing will not be damaged even should the wearer carry
burning objects out of the fire.
In many industries this preparation will be of inestimable value as it will
save a good many working expenses and will protect the life and health of the
workmen from dangers which have hitherto been combated with ardour but
without conspicuous success.
By means of the liquid produced by the present invention all kinds of fires
may be immediately extinguished whether caused by bisulphide of carbon,
petroleum, ether, benzine, pitch, tar or similar materials.
The liquid is prepared in the following way.
FIRST. PRELIMINARY.
300 gramines of silicic acid are mixed with 225 grammes of potash, 225 grammes
of sulphate of strontium and 300 grammes of talc (French chalk) and by stirring

page_text: solved. Then 33 grammes of pulverised burnt alum are added and this
mixture is again stirred until thoroughly dissolved. When this is accomplished
500 grammes of the silicic acid solution composed and prepared as indicated in
the preceding clause is simultaneously with 6 litres of water, slowly mixed with
the solution by constant stirring. Finally about 30 grammes of rice starch
and 5 grammes of sugar of lead are added to the mixture.
The liquid thus prepared constitutes the impregnating and fire extinguishing
preparation or compound above described.
If the preparation is intended to be used wholly and solely for the purpose of
extinguishing fire and not tor impregnating materials of any kind, the effect will
not be interfered with by the omission of the rice starch and sugar of lead.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed, we declare that what we
claim is
.
A liquid for impregnating and fire extinguishing purposes, produced by first
preparing a solution of 225 grammes of potash, 225 grammes of sulphate of
strontium and 300 grammes of French chalk in 300 grammes of silicic acid;
secondly, in a separate reservoir a solution of 400 grammes of fasersalz (a com-
pound salt with needle crystals found at Stassfurth, Germany) in 4 litres of
water 33 grammes of bi-carbonate of soda and 33 grammes of pulverized
burnt alum which are consecutively and separately mixed by constant surring
until thoroughly dissolved; and thirdly, mixing 500 grammes of the first solution
of silicic acid together with 6 litres of water by slowly adding same to the second
solution whilst constantly stirring with or without the addition of about 30
grammes of rice starch and 5 grammes of sugar of lead finely mixed therewith,
substantially as described.
Dated this 5th day of April 1898.
W. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.