IM- PROVED NON-CONDUCTING MATERIALS ESPECIALLY APPLICABLE FOR USE WHERE REPENTION OR EXCLUSION OF HEAT MAY BE REQUIRED.
Year: 1874

page_text: LETTERS PATENT to John Chapman Peacock, of Finsbury Park Road,
in the County of Middlesex, Gentleman, for the Invention of " IM-
PROVED NON-CONDUCTING MATERIALS ESPECIALLY APPLICABLE FOR USE WHERE
REPENTION OR EXCLUSION OF HEAT MAY BE REQUIRED.
"
PROVISIONAL SPECIFICATION left by the said John Chapman Peacock
at the Office of the Commissioners of Patents, with his Petition,
on the 17th August 1874.
I, JOHN CHAPMAN PEACOCK, of Finsbury Park Road, in the County of
Middlesex, Gentleman, do hereby declare the nature of the said Inven-
tion for "IMPROVED NON-CONDUCTING MATERIALS ESPECIALLY APPLICABLE FOR
USE WHERE RETENTION OR EXCLUSION OF HEAT MAY BE REQUIRED,'
to be as
follows:-
"
This Invention consists of a combination of substances each of great
power of resisting the passage of heat, but forming when placed in
juxtaposition in regulated proportions a non-conductor suitable for the
various appliances where retention or exclusion of heat may be required,

page_text: "
such in ovens, boilers, flues, steam pipes, ice safes, butter and milk
coolers, and such like articles, and combining the essentials of a perfect
conductor more effectually than has been obtained hitherto, namely,
lightness, non-conductibility, non-combustibility, non-compressibility,
and capability of being converted into a solid substance of very little
weight. To attain these objects I use the substance known in the cork
trade, as "cork soot or sweepings which has hitherto been looked upon
as a waste substance, or the "cork soot" may be made from the cork waste.
When I use this substance as a non-conductor for such appliances, as
ice safes, butter and milk coolers, and so forth, I prefer using it alone,
but when heat is to be retained as in the case of ovens, boilers, and such
like, or excluded as in the case of fireproof safes and such like, then I
mix with the cork soot in suitable proportions a non-combustible non-
conductor, such as lime, Portland cement, or the last solid products of
combustion or the ashes of substances, such as wood, coal, coke, and
such like materials. The proportions of these substances so combined
depend upon the amount of heat required to be retained or excluded, as
the less there is used of the non-combustible substance, the better, on
account of its greater weight and compressibility than the combustible
substances.
When the non-conductor is required to be in the form of a solid
substance or mortar for coating steam boilers, flues, steam pipes, and
such like, then the mixture should always have in it a suitable proportion
of either lime, plaster of Paris, or Portland cement, having a "setting"
or hardening power, and should be mixed with water.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Chapman Peacock in the Great Seal Patent
Office on the 17th February 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
CHAPMAN PEACOCK, of Finsbury Park Road, in the County of Middlesex,
Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of August, in the year
of our Lord One thousand eight hundred and seventy-four, in the thirty-

page_text: eighth year of Her reign, did, for Herself, Her heirs and successors;
give and grant unto me, the said John Chapman Peacock, Her special
licence that I, the said John Chapman Peacock, my executors, admini-
strators, and assigns, or such others as I, the said John Chapman
Peacock, my executors, administrators, and assigns, should at any time.
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVED NON-CONDUCTING MATERIALS ESPECIALLY APPLICABLE FOR USE
WHERE RETENTION OR EXCLUSION OF HEAT MAY BE REQUIRED,"
upon the
condition (amongst others) that I, the said John Chapman Peacock,
my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner the
same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
-
وو
NOW KNOW YE, that I, the said John Chapman Peacock, do hereby
declare the nature of my said 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 consists of a combination of substances each of great
power of resisting the passage of heat, but when mixed together and in
combination form a non-conductor suitable for the various appliances
where retention or exlusion of heat may be required, such as boilers,
ovens, flues, steam pipes, ice safes, butter and milk coolers, and such
like articles, and combining the essentials of a perfect non-conductor
more effectually than has been obtained hitherto. To attain these
objects I use an article known in the cork trade as cork soot or sweepings
which has hitherto been looked upon as a waste substance. This
substance has in itself a great power of preventing the passage of heat,
but admixed with twenty per cent. of slaked lime, Portland cement, or
plaster of Paris becomes a perfect non-conductor. The above-named
substances in this combination have all the characteristics of the cork
soot or sweepings, but in addition the quality of being uninflammable
even to the extent of resisting the action of red hot iron, and with this
quality it combines the essential of a perfect non-conductor more

page_text: effectually than has been attained before, namely, lightness, incom-
pressibility, and a capability of being converted into a solid substance,
thus forming a plaster or cement.
When the non-conductor is required to be in the form of a solid
substance or mortar for coating steam boilers, flues, steam pipes, and
such like, then the combination is made with ten per cent. less of cork
soot and mixed with water.
Having now particularly described the nature and object of my
Invention, and in what manner the same is to be performed or put in
practice, I hereby declare that I claim the herein described Invention
of Improved Non-conducting Materials especially applicable for Use
where Retention and Exclusion of Heat may be required," as the same is
herein-before set forth and described, though it is to be understood that
I do not limit myself to the proportions here-before described.
In witness whereof, I, the said John Chapman Peacock, have here-
unto set my hand and seal; this Sixteenth day of February, in
the year of our Lord One thousand eight hundred and seventy-
five.
JOHN CHAPMAN PEACOCK. (L.S.)
Witness,
T. MORGAN,
Secretary,
Inventors' Patent Right Association Limited,
21, Cockspur Street, S.W.