AN IMPROVED COMPOSITION FOR COATING SHIPS' BOTTOMS
Year: 1863

page_text: LETTERS PATENT to Frederic Newton Gisborne, of NO. 3,
Place, London Bridge, in the City of London, Engineer and Electrician,
for the Invention of "AN IMPROVED COMPOSITION FOR COATING SHIPS'
BOTTOMS."
Place, London Dridge,
City London, Engineer
for the Invention of "AN IMPROVED COMPOSITION FOR COATING SHIPS'
BOTTOMB."
Sealed the 26th April 1864, and dated the 30th October 1863.
PROVISIONAL SPECIFICATION left by the said Frederic Newton Gisborne
at the Office of the Commissioners of Patents, with his Petition, on
the 30th October 1868.
I, FREDERIC NEWTON GISBORNE, of No. 3, Adelaide Place, London Bridge,
in the City of London, Engineer and Electrician, do hereby declare the
nature of the said Invention for "AN IMPROVED COMPOSITION FOR COATING SHIPS'
BOTTOMS," to be as follows:-
I use in the composition the following ingredients or their chemical equiva-
lents, and in the proportions following, or nearly so, but the relative quantities
may be varied more or less.
Quicksilver, as a nitrate of silver or crude, but I prefer the latter, one
pound; red lead, half a pound; litharge, half a pound; powdered flint glass, or
asphalt, a quarter of a pound; vermilion or Chinese red a quarter of a pound,
mixed together as a pigment with boiled linseed oil.
The process of admixture I adopt is as follows, or nearly so:-I pour a
little oil on the quicksilver and rub it down for a few minutes, then gradually
add the powdered glass or asphalt to aid the disintegration of the globules of
the quicksilver. I mix the red lead and litharge dry first, and then add them
to the quicksilver so prepared. I then add the vermilion or Chinese red with

page_text: sufficient additional oil to form a composition about the ordinary consistency of
paint or pigment prepared for use. The composition is applied in the usual
way with two coatings, but the surface to which it is applied should be
clean.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frederic Newton Gisborne in the Great Seal Patent Office
on the 30th April 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERIC
NEWTON GISBORNE, of No. 3, Adelaide Place, London Bridge, in the City of
London, Engineer and Electrician, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirtieth day of October, in the year of our Lord One
thousand eight hundred and sixty-three, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Frederic Newton Gisborne, Her special licence that I, the said
Frederic Newton Gisborne, my executors, administrators, and assigns, or such
others as I, the said Frederic Newton Gisborne, 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 COMPOSITION FOR COATING SHIPS' BOTTOMS, шpon
the condition (amongst others) that I, the said Frederic Newton Gisborne,
my executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and ascer-
tain 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 Frederic Newton Gisborne, 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 :-
The nature of my said Invention, and the manner in which the same is to
be performed, is as follows:-

page_text: I use in the composition the following ingredients or their chemical equi-
valents, and in the proportions following, or nearly so, but the relative quantities
may be varied more or less.
Quicksilver, as a nitrate of silver or crude, but I prefer the latter, one
pound; red lead, half a pound; litharge, half a pound; powdered flint glass, or
asphalt, a quarter of a pound; vermilion or Chinese red, a quarter of a pound,
mixed together as a pigment with boiled linseed oil.
The process of admixture I adopt is as follows, or nearly so :-I pour a
little oil on the quicksilver and rub it down for a few minutes, then gradually
add the powdered glass or asphalt to aid the disintegration of the globules of
the quicksilver. I mix the red lead and litharge dry first, and then add them
to the quicksilver so prepared; I then add the vermilion or Chinese red, with
sufficient additional oil to form a composition about the ordinary consistency
of paint or pigment prepared for use. The composition is applied in the
usual way with two coatings, but the surface to which it is applied should
be clean.
The quicksilver is the essential ingredient in the composition.
Having described the nature of my said Invention, and in what manner
the same is to be performed, I wish it to be understood that what I claim
as my Invention is the composition substantially as herein-before described..
In witness whereof, I, the said Frederic Newton Gisborne, have hereunto
set my hand and seal, this Twenty-ninth day of April, in the year
of our Lord One thousand eight hundred and sixty-four.
T. N. GISBORNE. (L.S.)