AN IMPROVED MEANS OF PROTECTING, PRE- SERVING, AND HARDENING SURFACES OF BRICK, CEMENT, STONE, STUCCO, AND OTHER ANALOGOUS SUBSTANCES, WHICH INVENTION IS ALSO APPLICABLE TO THE PRESERVATION OF TIMBER
Year: 1863

page_text: LETTERS PATENT to Frederick Settle Barff, of the City and County of
Dublin, for the Invention of "AN IMPROVED MEANS OF PROTECTING, PRE-
SERVING, AND HARDENING SURFACES OF BRICK, CEMENT, STONE, STUCCO, AND
OTHER ANALOGOUS SUBSTANCES, WHICH INVENTION IS ALSO APPLICABLE TO THE
PRESERVATION OF TIMBER."
Sealed the 1st December 1863, and dated the 3rd June 1863.
PROVISIONAL SPECIFICATION left by the said Frederick Settle Barff
at the Office of the Commissioners of. Patents, with his Petition, on the
3rd June 1863.
I, FREDERICK SETTLE BARFF, of the City and County of Dublin, do hereby.
declare the nature of the said Invention for "AN IMPROVED MEANS OF PRO-
TECTING, PRESERVING, AND HARDENING SURFACES OF BRICK, CEMENT, STONE, STUCCO,..
AND OTHER ANALAGOUS SUBSTANCES, WHICH INVENTION IS ALSO APPLICABLE TO THE
PRESERVATION OF TIMBER," to be as follows:-
My Invention has for its object the employment of an improved means of
protecting, preserving and hardening surfaces of brick, cement, stone, stucco,.
and other analagous substances. For the purposes of my Invention I employ
a compound of the soluble silicates of soda or potash. (by preference, the.
silicate of potash) with a mixture of sulphate of baryta and carbonate of lime.
The proportions I employ are the following:-I take two parts by weight of
sulphate of baryta and one part of carbonate of lime. Having intimately

page_text: mixed these, I add as much water as will form a paste, and then add thereto
a solution of silicate of potash, having the specific gravity of 1.20, until the
consistency of an ordinary paint is obtained when the mixture is ready for use.
My object in using the sulphate of baryta is to prevent the too rapid combination
of the silica with the lime, and so to secure the formation of the insoluble
silicate immediately upon the surface coated.
The mixture as above described is to be laid on with a brush in the same
manner as an ordinary oil paint, and to produce the maximum of hardness and
durability, the material so laid on should afterwards be further saturated with
the silicate of potash. If color be required, I mix umber, ochre, or similar
substances to give the required shade.
Having thus described my Invention, it is to be understood, that what I
claim is the use of the mixture of sulphate of baryta and carbonate of lime
with a soluble silicate of soda or potash as above described.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Settle Barff in the Great Seal Patent Office on the
3rd December 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
SETTLE BARFF, of the City and County of Dublin, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of June, in the year of our Lord One
thousand eight hundred and sixty-three, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Frederick Settle Barff, Her special licence that I, the said Frederick
Settle Barff, my executors, administrators, and assigns, or such others as I,
the said Frederick Settle Barff, 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
"AN IMPROVED MEANS OF PROTECTING, PRESERVING, AND HARDENING SURFACES OF
BRICK, CEMENT, STONE, STUCCO, AND OTHER ANALOGOUS SUBSTANCES, WHICH INVEN-
TION IS ALSO APPLICABLE TO THE PRESERVATION OF TIMBER," upon the condition
(amongst others) that I, the said Frederick Settle Barff, 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

page_text: 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.
NOW KNOW YE, that I, the said Frederick Settle Barff, 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:--
My Invention has for its object the employment of an improved means of
protecting, preserving, and hardening surfaces of brick, cement, stone, stucco,
and other analogous substances. For the purposes of my Invention I employ
a compound of the soluble silicates of soda or potash (by preference, the
silicate of potash) with a mixture of sulphate of baryta and carbonate of lime.
The proportions I employ are the following:-I take two parts by weight of
sulphate of baryta, and one part of carbonate of lime. Having intimately
mixed these, I add as much water as will form a paste, and then add thereto
a solution of silicate of potash, having the specific gravity of 1.20 until the
consistency of an ordinary paint is obtained, when the mixture is ready for use.
My object in using the sulphate of baryta is to prevent the two rapid com-
bination of the silica with the lime, and so to secure the formation of the
insoluble silicate immediately upon the surface coated.
The mixture as above described is to be laid on with a brush in the same
manner as an ordinary oil paint, and to produce the maximum of hardness
and durability, the material so laid on should afterwards be further saturated
with the silicate of potash. If colour be required, I mix umber, ochre, or
similar substances to give the required shade.
Having thus described my Invention, it is to be understood, that what I
claim is the use of the mixture of sulphate of baryta and carbonate of lime,
with a soluble silicate of soda or potash as above described..
In witness whereof I, the said Frederick Settle Barff, have hereunto set
my hand and seal, this Third day of December, in the year of our
Lord One thousand eight hundred and sixty-three
Witness to the signature of the
said Frederick Settle Barff,
JAMES MARTIN.
FRED. SETTLE BARFF. (L.S.)