IMPROVEMENTS IN COMPOSITIONS FOR PREVENT- ING AND REMOVING INCRUSTATION IN BOILERS
Year: 1862

page_text: . LETTERS PATENT to Alexander Delrue, of Dunkirk, in the Empire of
France, for the Invention of "IMPROVEMENTS IN COMPOSITIONS FOR PREVENT-
ING AND REMOVING INCRUSTATION IN BOILERS."
Sealed the 6th February 1863, and dated the 12th August 1862.
PROVISIONAL SPECIFICATION left by the said Alexander Delrue at the
Office of the Commissioners of Patents, with his Petition, on the 12th
August 1862.
I, ALEXANDER DELRUE, of Dunkirk, in the Empire of France, do hereby
declare the nature of the Invention for "IMPROVEMENTS IN COMPOSITIONS
FOR PREV NTING AND REMOVING INCRUSTATION IN BOILERS," to be as follows:-
This Invention has for its object improvements in compositions for preventing
and removing incrustation in boilers. The compositions are composed entirely
of vegetable matters and are prepared by dissolving in hot water the bark of
the oak and pine as well as the leaves of the sumac tree ground, and reduced
to the state of a coarse powder; this decoction is concentrated to a density of
about 10° Beaumé, and to it is added a quantity of cream of tartar (bitartratė
of potassa) and spirit of turpentine. In employing this liquid to prevent
incrustation in steam boilers a quantity of it is introduced from time to time
into the steam boilers; the quantity of the liquid required varies accord-

page_text: ing to the capacity of the boiler, three pints of the liquid being generally
sufficient for every thousand pints of water in the boiler to prevent incrustation
forming for about 10 days.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Alexander Delrue in the Great Seal Patent Office on the
11th February 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
DELRUE, of Dunkirk, in the Empire of France, send greeting.
.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of August, in the year of our Lord One
thousand eight hundred and sixty-two, in the twenty-sixth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the
said Alexander Delrue, Her special licence, that I, the said Alexander Delrue,
iny executors, administrators, and assigns, or such others as I, the said Alexander
Delrue, 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, usc, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN COM-
POSITIONS FOR PREVENTING AND REMOVING INCRUSTATION IN BOILERS," upon the
condition (amongst others) that I, the said Alexander Delrue, 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 noxt and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Alexander Delrue, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in compositions for preventing
and removing incrustation in boilers. The compositions are composed entirely
of vegetable matters, and are prepared by dissolving or infusing in hot water
the bark of. the oak and pine as well as the leaves of the sumac tree ground
and reduced to the state of a coarse powder; this decoction is concentrated to
a density of about 10° Beaumé, and to it is added a quantity (say from 15

page_text: to 30 per cent.) of cream of tartar (bitartrate of potassa) and spirit of
turpentine. In employing this liquid to prevent incrustation in steam boilers,
a quantity of it is introduced from time to time into the steam boilers, the
quantity of the liquid required varies according to the capacity of the boiler, three
pints of the liquid being generally sufficient for every thousand pints of water
in the boiler to prevent incrustation forming for about ten days.
In witness whereof, I, the said Alexander Delrue, have hereunto set my
hand and seal, this Seventh day of February, in the year of our
Lord one thousand eight hundred and sixty-three.
A. DELRUE. (L.S.)