A NEW AND IMPROVED COMPOSITION FOR PREVENTING THE RADIATION OF HEAT
Year: 1878

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, of the Firm of J. Brandt
and G. W. von Nawrocki, of 124, Leipzigerstrasse, Patent Agents, of Berlin,
German Empire, for the Invention of "A NEW AND IMPROVED COMPOSITION
FOR PREVENTING THE RADIATION OF HEAT." A communication from Philipp
Strelitz, of Berlin, German Empire.
Sealed the 6th December 1878, and dated the 17th June 1878.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 17th June
1878.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. von
Nawrocki, of 124, Leipzigerstrasse, Patent Agents, of Berlin, German Empire.
"A NEW AND IMPROVED COMPOSITION FOR PREVENTING THE RADIATION OF
HEAT." (A communication from Philipp Strelitz, of Berlin, German Empire.)
This Invention has for its object the production of a new and improved com-
position for preventing radiation of heat. This composition is composed of fossil
dust mixed by mechanical means with suitable. binding materials and water, sub-
stantially in the following proportions :-
25 parts clean fossil dust.
4 parts rye meal.
4 parts coal tar.
2 parts animal hair.
5 parts cotton seed.
60 parts water.
The composition is made in the following manner:-The fossil dust is cleansed in
a washing machine, and the sand and vegetable matter driven off; then the fossil
dust is dried and finely ground in a mill; the coal tar is deprived of its water by
boiling; the animal hair is drawn asunder and separated in a willowing machine,
and by means of a sieve freed from sand, et cætera; the cotton seeds are boiled, and

page_text: all the ingredients are mixed together in a mixing machine, the tar and cotton
seeds being placed therein in a boiling state.
When the mixing operation has been thoroughly performed, the mixture is sub-
mitted to a process of fermentation in a warm place, the duration of which is
governed by the temperature, and is completed when the composition has reached a
state of complete rest.
The composition can not only be applied to all surfaces which are heated by
steam, water, or air, without injury to the surfaces covered, but also to surfaces
subject to constant shocks, as in the case of locomotives and tubes connected to
steam hammers.
The composition is made in the following manner :-The fossil dust is cleansed in 3
a washing machine, and the sand and vegetable inatter are driven off; then the
fossil dust is dried and finely ground in a mill; the coal tar is deprived of its water
by boiling; the animal hair is drawn asunder and separated in a willowing machine,
and by means of a sieve freed from sand, et cætera; the cotton seeds are boiled, and
all the ingredients are inixed together in a mixing machine, the tar and the cotton 3
seeds being placed therein in a boiling state.
When the mixing operation has been thoroughly performed, the mixture is sub-
mitted to a process of fermentation in a warm place, the duration of which is
.

page_text: "
governed by the temperature, and is completed when the composition has reached a
state of complete rest. A temperaturo of from 55 to 65 degrees "Fahrenheit"
is sufficient for fermentation. The fermentation may be continued for from 4 to
5 days.
The composition can be applied not only to all surfaces which are heated by
steam, water, or air, without injury to the surfaces covered, but also to surfaces
subject to constant shocks, as in the case of locomotives and tubes connected to
steam hammers.
A coating of the new and improved composition of from 8 to 13 millimetros in
thickness is sufficient even for high-pressure steam boilers, the improved composition
being very efficient in preventing radiation of heat. It is very useful for coating
pipes, as it does not involve loading them with a heavy weight of material,
necessary when other kinds of coating are used; moreover, owing to its property of
absorbing moisture, oxidation of surfaces consequent upon exposure to moisture is
by its use obviated.
Having described the nature of the said Invention, and explained the modo of
carrying it into practical effect, as communicated to me as aforesaid, I hereby declare
that what I consider to be novel and original, and therefore claim as secured to ine
under the Lotters Patent heroin-before in part rocited is, the new and improved
manufacture of composition for preventing radiation of heat, substantially as herein-
before described.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, havo here-
unto set my hand and seal, this Eighth day of December, in the year of our
Lord One thousand eight hundred and seventy-eight.