AN IMPROVED COMPOSITION FOR REMOVING SCALE OR FUR .FROM THE INTERIOR OF BOILERS, AND ALSO FOR PREVENTING THE FORMATION OF SCALE OR FUR THEREIN
Year: 1859

page_text: LETTERS PATENT to Thomas Blinkhorn and Richard Blinkhorn, both of
New Road, Spalding, in the County of Lincoln, Engineers, for the
Invention of "AN IMPROVED COMPOSITION FOR REMOVING SCALE OR FUR
.FROM THE INTERIOR OF BOILERS, AND ALSO FOR PREVENTING THE FORMATION
OF SCALE OR FUR THEREIN."
Sealed the 27th January 1860, and dated the 8th August 1859.
PROVISIONAL SPECIFICATION left by the said Thomas Blinkhorn and
Richard Blinkhorn at the Office of the Commissioners of Patents, with
their Petition, on the 8th August 1859.
We, THOMAS BLINKHORN and RICHARD BLINKHORN, both of the New
Road, Spalding, in the County of Lincoln, Engineers, do hereby declare the
nature of the said Invention for "AN IMPROVED COMPOSITION FOR REMOVING
SCALE OR FUR FROM THE INTERIOR OF BOILERS, AND ALSO FOR PREVENTING THE
FORMATION OF SCALE OR FUR THEREIN," to be as follows:-
This Invention has for its object an improved composition for removing
scale or fur from the interior of boilers, and also for preventing the formation
of scale or fur therein. For this purpose we employ a mixture of the following
substances, viz. -Animal fat or grease, fullers' earth, soda mixed with neats-
foot or Colza oil, night soil, and the substance known in commerce as Nixey's
washing powder. This composition being placed in a boiler loosens and
removes any scale or fur which may have accumulated within it; or if the
boiler is already clean, it prevents the formation of scale or fur.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Blinkhorn and Richard Blinkhorn in the Great Seal
Patent Office on the 8th February 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
BLINKHORN and RICHARD BLINKHORN, both of New Road, Spalding, in the
County of Lincoln, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of August, in the year of our Lord One
thousand eight hundred and fifty-nine, in the twenty-third year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto us, the said Thomas
Blinkhorn and Richard Blinkhorn, Her special licence that we, the said Thomas
Blinkhorn and Richard Blinkhorn, our executors, administrators, and assigns,
or such others as we, the said Thomas Blinkhorn and Richard Blinkhorn,
our 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 COMPOSITION FOR
REMOVING SCALE OR FUR FROM THE INTERIOR OF BOILERS, AND ALSO FOR PREVENTING
THE FORMATION OF SCALE OR FUR THEREIN," upon the condition (amongst others)
that we, the said Thomas Blinkhorn and Richard Blinkhorn, our executors
or administrators, by an instrument in writing under our or their hands and
seals, or under the hand and seal of one of us or them, 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 Thomas Blinkhorn, on behalf of myself
and the said Richard Blinkhorn, do hereby declare the nature of the said
Invention, and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement thereof,
that is to say:-
This Invention has for its object an improved composition for removing
scale or fur from the interior of boilers, and also for preventing the formation
of scale or fur therein. For this purpose we employ a mixture of the following
substances, viz. :-Animal fat or grease, fullers' earth, soda mixed with neats-
foot or Colza oil, night soil, and the substance known in commerce as Nixey's
washing powder. This composition being placed in a boiler loosens and

page_text: removes any scale or fur which may have accumulated within it; or if the
boiler is already clean it prevents the formation of scale or fur.
Having thus stated the nature of our said Invention, we will proceed more
fully to describe the manner of performing the same.
The proportions in which the substances above mentioned are used may be
varied, but we believe that the following will be found most advantageous;
we do not, however, confine ourselves thereto :-
14 lbs. of animal grease or fat.
3 lbs. of fullers' earth.
3 lbs. of carbonate of soda.
1 pints of Colza oil, or of neats-foot oil.
3 lbs. dry night soil.
1 lbs. Nixey's washing powder :-
These are all mixed intimately together by grinding the Colza or neats-foot
oil with the soda, then adding the fullers' earth, then the night soil, then
Nixey's washing powder, and then the animal grease or fat; and we have, in
some cases, added 1 lb. of burned borax, but the same may be omitted. The
composition thus prepared is then ready for use. We have found that,
although the quantity necessary to keep boilers clean varies to some extent
depending on the quality of the water, we have not found it necessary
in any
case to use more than about 1 lb. of the composition in 12 hours for each
eight-horse power of the boiler. The quantity found necessary by practice is
introduced into the steam boiler about every 12 hours.
Having thus described the nature of our said Invention, and the manner of
performing the same, we would have it understood that we do not claim any
of the substances separately; but what we claim is, the combination of
substances herein described.
In witness whereof, I, the said Thomas Blinkhorn, have hereunto set
my hand and seal, this Seventh day of February, in the year of our
Lord One thousand eight hundred and sixty.
The mark and seal of THOMAS BLINKHORN + (LS)
The mark and seal of THOMAS BLINKHORN. + (LS)
Witness to the mark of Thomas Blinkhorn,
S. CARPMAEL.