IMPROVEMENTS IN ANTI-FOULING AND PRESERVATIVE COMPOSITIONS FOR SHIPS' BOTTOMS AND OTHER SUBMERGED SURFACES." PROVISIONAL SPECIFICATION
Year: 1879

page_text: LETTERS PATENT to Albert Charles Augustus Holzapfel, of No. 33, Quay Side,
in the Borough and County of Newcastle upon Tyne, Merchant, for the Inven-
tion of "IMPROVEMENTS IN ANTI-FOULING AND PRESERVATIVE COMPOSITIONS
FOR SHIPS' BOTTOMS AND OTHER SUBMERGED SURFACES."
PROVISIONAL SPECIFICATION left by the said Albert Charles Augustus
Holzapfel at the Office of the Commissioners of Patents on the 15th March
1879.
ALBERT CHARLES AUGUSTUS HOLZAPFEL, of No. 33, Quayside, in the Borough
"IMPROVEMENTS IN ANTI-FOULING
and County of Newcastle upon Tyne, Merchant.
AND PRESERVATIVE COMPOSITIONS FOR SHIPS' BOTTOMS AND OTHER SUBMERGED
SURFACES."
This Invention relates to an improved composition for preventing the fouling of
ships' bottoms and other submerged iron surfaces, for preserving them from corrosion,
and for protecting them against shells, barnacles, and marine vegetation.
I prefer the composition of the following ingredients in the proportions named,
which however may be varied according to the trade in which the ships to be
coated may be employed or otherwise, according to circumstances:-
1. Coal tar or black varnish
2. Methylated spirit
3. Rosin
4. Shellac
5. Pine oil
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-
-
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5 parts.
25
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10
"
"
3
"
-
5
6. Colouring matter, umber brown, and 1 }
oxide of iron
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-
7. Chloride or oxide of mercury
8. Sulphide of antimony
9. Arsenic
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32
2226
"
"
-
12
"
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"

page_text: The mode of manufacturing the composition out of the above ingredients is as
follows: Dissolve 3 and 4 in 2; add 1, 5, and 6, and then 7, 8, and 9, and let the
mixture stand 24 hours before filling into casks for use.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Albert Charles Augustus Holzapfel in the Great Seal Patent
Office on the 15th September 1879.
ALBERT CHARLES AUGUSTUS HOLZAPFEL, of 33, Quay Side, in the Borough and
County of Newcastle upon Tyne, Merchant. "IMPROVEMENTS IN ANTI-FOULING
AND PRESERVATIVE COMPOSITIONS FOR SHIPS' BOTTOMS AND OTHER SUBMERGED
SURFACES."
The Invention relates to an improved composition for preserving and preventing
the fouling of iron ships' bottoms as well as other submerged surfaces, for the
purpose of preserving them from fouling and corrosion, and protecting them against
shells, barnacles, and marine vegetation.
The composition consists of the following ingredients, which may be varied
according to the trade in which the ships to be coated may be employed and other
540 "
=
Important features in this Invention are the use of the following ingredients:
1stly. The use of coal tar which makes the paint pliable and enables it to be
applied over ships' bottoms previously coated with coal tar, black varnish, or black
lead, for which other paints are impracticable.
2ndly. The use of pine oil, which is less subject to accidation in salt water than
other oils.
3rdly. The use of litharge for anti-fouling purposes.
The ingredients have to be mixed in the following manner :-Dissolve 4 and 5 in
2; then add 1 & 3; then 6, 7, 8, and 9, and after thoroughly agitating at 2 or 3
intervals of 24 hours fill out for use:
In witness whereof, I, the said Albert Charles Augustus Holzapfel, have here-
unto set my hand and seal, this Tenth day of September, in the year of
our Lord One thousand eight hundred and seventy nine.