IMPROVEMENTS IN PRESERVATIVE COATINGS, CAND O CARRO TANKS AND OTHER VESSELS."
Year: 1866

page_text: LETTERS PATENT to Alexander Taylor Machattie, Doctor of Philosophy
and Analytical Chemist, of Glasgow, in the County of Lauark, North
Britain, for the Invention of "IMPROVEMENTS IN PRESERVATIVE COATINGS,
CAND O CARRO TANKS AND OTHER VESSELS."
PROVISIONAL SPECIFICATION left by the said Alexander Taylor.
Machattie at the Office of the Commissioners of Patents, with his
Petition, on the 9th March 1866.
I, ALEXANDER TAYLOR MACHATTIE, Doctor of Philosophy and Analytical
Chemist, of Glasgow, in the County of Lanark, North Britain, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN PRESERVATIVE
COATINGS, AND IN APPLYING THE SAME TO CASES, TANKS, AND OTHER VESSELS," to
be as follows, that is to say :-
This Invention has for its object the coating of metallic or wooden casks,
tanks, and other vessels in such a way that they may be used for conveying
liquids or solids of various kinds without giving rise to any appreciable action
of an injurious character between the metallic or wooden surfaces and the
contents. The preservative coatings consist of Portland cement, Romau
cement, or hydraulic lime and silicate of soda or of potash, otherwise termed
"soluble glass." In applying the coatings the cement or hydraulic lime in a
finely ground state and mixed with water is first applied to the metallic or
wooden surface like paint, and when thoroughly dried a solution of silicate of
soda or of potash is similarly applied. When the second coating is thoroughly

page_text: dry the article is steeped in water to remove all soluble matters. One or both
of the coatings may be repeated if it is found that the surface is not completely
covered with the first application.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Alexander Taylor Machattie in the Great Seal Patent
Office on the 7th September 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I; ALEXANDER
TAYLOR MACHATTIE, Doctor of Philosophy and Analytical Chemist of Glasgow,
in the County of Lanark, North Britain, send greeting.
WHEREAS Her most Excellent Majesty. Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of March, in the year of our Lord
Que thousand. eight hundred and sixty-six,. in the twenty-ninth year of
Her reign, did, for. Herself, Her heirs and successors, give and grant unto
me, the said Alexander Taylor Machattie, Her special license that I, the
said Alexander Taylor Machattie, my executors, administrators, and assigns,
or such others as I, the said Alexander Taylor Machattie, 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 Mau, an Invention, for "IMPROVEMENTS IN PRESERVATIVE COATINGS, AND
IN APPLYING THE SAME TO CASKS, TANKS, AND OTHER VESSELS," upon the condition
(amongst others) that I, the said Alexander Taylor Machattie, 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.
NOW KNOW YE, that I, the said Alexander Taylor Machattie, 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 in writing, that is to say:-
My said Invention has for its object the coating or lining of metallic or
wooden casks, tanks, and other vessels internally in such a way that they
may be used for conveying liquids or solids of various kinds without giving

page_text: rise to any appreciable action of an injurious character between the metallic
or wooden surfaces and the liquid or solid contents.
And my said Invention consists in obtaining or forming on the internal
surfaces of metallic or wooden casks, tanks, or other vessels the desired
preservative or protecting coating or lining by applying thereto Portland
cement, Roman cement, or hydraulic. lime, and silicate of soda or of potash,
otherwise termed "soluble. glass."
In practically carrying out my said Invention I take the cement or
hydraulic lime in a finely ground state, and having well mixed it with water
to a convenient consistency, such as that of paint, I apply it with a brush like
paint to the metallic or wooden surface to be coated or lined, such surface
being previously carefully cleaned. After this first coating of cement or lime
has become thoroughly dried I similarly apply or brush on over it a solution
of silicate of soda or of potash; this second coating is also thoroughly dried,
and the article is afterwards steeped in water to remove all soluble matters.
If the two coatings thus described are carefully applied, and upon clean
surfaces, no further treatment will be found requisite ; but if it is found that
the surface has not been completely covered, or if the coating has not adhered
on some parts, the two coatings and subsequent washing may be repeated.
Having thus particularly described ny said Invention, and the manner in
which the same is to be performed, I have to state that I do not restrict
myself to the precise details herein described, but that what I believe to be
novel and original, and claim as the Invention secured to me by the herein-
before in part recited Letters Patent is, the formation of preservative coatings,
and the application thereof to casks, tanks, and other vessels, by employing
Portland cement, Roman cement, or hydraulic lime and silicate of soda or of
potash, substantially in the manner herein-before described.
In witness whereof, I, the said Alexander Taylor Machattie, have
hereunto set my hand and seal, this Seventeenth day of May, in the
year of our Lord One thousand eight hundred and sixty-six.
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
ALEXR. T. MACHATTIE. (L.S.)