AN IMPROVED COMPOUND FOR REMOVING AND PREVENTING INCRUSTATION IN STEAM BOILERS
Year: 1866

page_text: LETTERS PATENT to Mark Silvester, of Gilbert Road, Kennington
Lane, in the County of Surrey, Engineer, for the Invention of "AN
IMPROVED COMPOUND FOR REMOVING AND PREVENTING INCRUSTATION IN STEAM
BOILERS."
Sealed the 12th June 1866, and dated the 23rd January 1866.
PROVISIONAL SPECIFICATION left by the said Mark Silvester at the
Office of the Commissioners of Patents, with his Petition, on the
23rd January 1866.
I, MARK SILVESTER, of Gilbert Road, Kennington Lane, in the County
of Surrey, Engineer, do hereby declare the nature of the said Invention
for "AN IMPROVED COMPOUND FOR REMOVING AND PREVENTING INCRUSTATION IN
STEAM BOILERS," to be as follows:-
The object of this Invention is to provide a compound which will break
up incrustation already formed in steam boilers, and to preserve the earthy
deposits from the feed water in a loose and disintegrated state, so that it
may readily be "blown out" from time to time as the deposit accumu-
lates. To this end I combine with carbonate of potassa, carbonate of
soda, and muriate of ammonia powdered charcoal, or other like inert
matter, and having intimately mixed the same either form the compound
into cakes or retain it as a powder. In either state when using the

page_text: compound I mix it in water, and discharge it in suitable quantities into
the feed water of the boiler. As an approximation to the proportions of
the ingredients I may give the following, viz. :-
4 uarts by weight of carbon or charcoal in powder.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Mark Silvester in the Great Seal Patent Office on the
23rd July 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MARK
SILVESTER, of Gilbert Road, in the County of Surrey, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-third day of January, in the year of our
Lord One 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 Mark Silvester, Her special licence that I, the said
Mark Silvester, my executors, administrators, and assigns, or such others
as I, the said Mark Silvester, 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 COMPOUND FOR REMOVING AND PREVENTING INCRUSTATION IN
STEAM BOILERS," upon the condition (amongst others) that I, the said Mark
Silvester, 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 Mark Silvester, do hereby declare the
nature of my 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 (that is to say):-

page_text: This Invention relates to the preparation of a composition hereafter
specified, which when it is introduced into a foul or incrusted steam boiler
shall cause the incrustation of earthy matter deposited from the water to
break up or disintegrate, so that it may be blown out of the boiler in the
usual manner, and which when it is introduced into a clean steam boiler
shall prevent incrustation or cohering deposit from being formed, as
in this case the deposit will be non-cohering and might be blown out of
the boiler as a kind of mud. The composition which I have successfully
used in carrying out the object of this Invention consists of -
4 parts by weight of charcoal or carbon in powder.
2 do.
do.
8
do.
do.
1 do.
do.
carbonate of potash.
carbonate of soda.
muriate of ammonia.
I do not however limit myself to the exact proportions of the ingredients
stated above, but have merely indicated those as the proportions which I
have found to be practically most convenient.
Having now described my Invention of "An Improved Compound for
Removing and Preventing Incrustation in Steam Boilers, I desire it to be
understood that under the above in part recited Letters Patent I claim
the preparation of a composition for removing the cohering earthy deposit
when already formed in a steam boiler, or for preventing the solidification
of such deposit, by combining charcoal, carbonate of potash, carbonate of
soda, and muriate of ammonia as above described.
In witness whereof, I, the said Mark Silvester, have hereunto set
my hand and seal, the Twenty-first day of July, in the year of our
Lord One thousand eight hundred and sixty-six.
Witness,
FRED. WALKDEN,
66, Chancery Lane.
MARK SILVESTER. (L.s.)