AN IMPROVED COMPOSITION FOR PROTECTING THE BOTTOMS. OF SHIPS AND OTHER STRUCTURES OF IRON
Year: 1859

page_text: LETTERS PATENT to Robert Royds and Anthony Harcourt, both of
Woolston, in the County of Hants, Engineers, for the Invention of
"AN IMPROVED COMPOSITION FOR PROTECTING THE BOTTOMS. OF SHIPS AND
OTHER STRUCTURES OF IRON."
Sealed the 30th December 1859, and dated the 1st July 1859.
PROVISIONAL SPECIFICATION left by the said Robert Royds and
Anthony Harcourt at the Office of the Commissioners of Patents, with
their Petition, on the 1st July 1859.
We, ROBERT ROYDS and ANTHONY HARCOURT, both of Woolston, in the
County of Hants, Engineers, do hereby declare the nature of the said Inven-
tion for "AN IMPROVED COMPOSITION FOR PROTECTING THE BOTTOMS OF SHIPS AND
OTHER STRUCTURES OF IRON," to be as follows:-
We take burnt clay, litharge, white lead or zinc white, sharp sea or river
sand, or calcined flint, tar, or bitumen, and arsenic; we grind all these
materials together, then add linseed or other suitable oil, and expose the
whole to heat of about 210° Fahrenheit. In some cases we dispense with oil
and use a greater quantity of bitumen. After the composition has been heated
sufficiently, we add naphtha or other spirit thereto, and apply it warm to the
bottom of the iron ship or other structure to be protected.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Robert Royds and Anthony Harcourt in the Great Seal
Patent Office on the 31st December 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ROBERT
ROYDS and ANTHONY HARCOURT, both of Woolston, in the County of Hants,
Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of July, in the year of our Lord One
thousand eight hundred and fifty-uine, in the twenty-third year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said Robert Royds and Anthony Harcourt, Her special licence that we, the
said Robert Royds and Anthony Harcourt, our executors, administrators, and
assigns, or such others as we, the said Robert Royds and Anthony Harcourt,
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
PROTECTING THE BOTTOMS OF SHIPS AND OTHER STRUCTURES OF IRON," upon the
condition (amongst others) that we, the said Robert Royds and Anthony
Harcourt, or one of us, our executors or administrators, by an instrument in
writing under our, or one of our, 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 we, the said Robert Royds and Anthony Harcourt,
do hereby declare the nature of our said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say :-
We take burnt clay, litharge, white lead or zinc white, sharp sea or river
sand, or calcined flint, tar, or bitumen, and arsenic; we grind all these
materials together, then add linseed or other suitable oil, and expose the
whole to heat of about 210° Fahrenheit. In some cases we dispense with oil
and use a greater quantity of bitumen. After the composition has been heated
sufficiently, we add naphtha or other spirit thereto, and apply it, by preference,
warm to the bottom of the iron ship or other structure to be protected. We

page_text: A. HARCOURT. (L.S.)
R. ROYDS.
(L.S,)