IMPROVEMENTS IN PREVENTING INCRUSTATION IN STEAM BOILERS
Year: 1863

page_text: LETTERS PATENT to Charles Terrett, of Clifton Place, Stapleton Road,
Bristol, Saddler and Harness Maker, for the Invention of "IMPROVEMENTS
IN PREVENTING INCRUSTATION IN STEAM BOILERS."
Sealed the 25th September 1868, and dated the 16th April 1863.
PROVISIONAL SPECIFICATION left by the said Charles Terret at the
Office of the Commissioners of Patents, with his Petition, on the 16th
April 1863.
I, CHARLES TERRETT, of Clifton Place, Stapleton Road, Bristol, Saddler
and Harness Maker, do hereby declare the nature of the Invention for
"IMPROVEMENTS IN PREVENTING INCRUSTATION IN STEAM BOILERS," to be as.
follows:-
This Invention has for its object improvements in preventing incrustation
in steam boilers. For this purpose I employ a composition consisting of terra
japonica, or mamosa japonica, myrabolums, devi-devi, and cutch; I take equal
parts of these substances and mix them with water, I boil and evaporate the
inixture till it becomes of the consistency of paste. When required for use
I nix this paste with sufficient warm water to make it quite liquid and
introduce it into the boiler. I employ about a pound of the mixture of dry
materials above mentioned for each nominal horse-power of the boiler.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Terrett in the Great Seal Patent Office on the
15th October 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
TERRETT, of Clifton Place, Stapleton Road, Bristol, Saddler and Harness
Maker, send greeting.
U
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of April, 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 Charles Terrett, Her special licence that I, the said Charles
Terrett, my executors, administrators, and assigns, or such others as I,
the said Charles Terrett, 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 "Im-
PROVEMENTS IN PREVENTING INCRUSTATION IN STEAM BOILERS," upon the condition
(amongst others) that I, the said Charles Terrett, my executors or adminis-
trators, 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 Charles Terrett, do hereby declare
the nature of the said Invention, and in what manner the saine is to be
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
:
My Invention consists in producing a composition from the substances
bereafter mentioned in the manner herein described and applying the same in
steam boilers in order to prevent incrustation. The composition in each case
consists of a combination of terra japonica (gambier), or mimosa japonica,
divi-divi, cutch (catechu) and myrabolams. The proportions in which these
substances are combined in making a composition may be greatly varied.
These substances are mixed together and boiled with water till the mixture is
evaporated and is reduced to the consistency of thick paste. The boiled
nixture whilst still sufficiently fluid should be strained through a sieve. When

page_text: the water used in a steam boiler is ouly moderately hard, I have found that
a composition consisting of equal parts by weight of the four substances is
very suitable for the purpose, and I introduce into a steam boiler after the
water has been supplied thereto a quantity of the composition equal to about
half a pound (dry weight) for each nominal horse-power of the engine worked
by the steam boiler, which will last for about a month in preventing incrus-
tation; if, however, incrustation still forms in the boiler I increase the quantity
of the composition. For marine engine boilers I have found it desirable to
increase the quantity of cutch (catechu) in the composition, and I have in
some cases found it desirable to employ as much as eighty-two pounds by
weight of this material to ten pounds of each of the other three substances.
In witness whereof, I, the said Charles Terrett, havo hereunto set my
hand and seal, this Fifth day of October, in the year of our Lord
One thousand eight hundred and sixty-three.
CHARLES TERRETT. (L.s.)