AN IMPROVED ANTI-FOULING COMPOSITION FOR SHIPS' BOTTOMS AND SUBMERGED STRUCTURES."
Year: 1880

page_text: LETTERS PATENT to Thomas Trebell, of Limehouse, in the County of Middlesex,
for an Invention of "AN IMPROVED ANTI-FOULING COMPOSITION FOR SHIPS'
BOTTOMS AND SUBMERGED STRUCTURES."
PROVISIONAL SPECIFICATION left by the said Thomas Trebell at the Office
of the Commissioners of Patents on the 27th January 1880.
"AN IMPROVED
THOMAS TREBELL, of Limehouse, in the County of Middlesex.
ANTI-FOULING COMPOSITION FOR SHIPS' BOTTOMS AND SUBMERGED STRUCTURES."
My Invention relates to an improved antifouling composition for ships' bottoms,
prepared with the following ingredients, viz. :-Black lead, French chalk, palm oil,
rosin oil, with or without a suitable coloring matter, such as red lead. I find the
following proportions give good results, but do not limit myself thereto, as the
same may be varied without departing from my Invention :-
-

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Trebell in the Great Seal Patent Office on the 27th July
1880.
THOMAS TREBELL, of Limehouse, in the County of Middlesex. "AN IMPROVED
ANTI-FOULING COMPOSITION FOR SHIPS' BOTTOMS AND SUBMERGED STRUCTURES."
My Invention relates to an improved antifouling composition for ships' bottoms
and submerged structures, prepared with the following ingredients, viz. :- Black
lead, French chalk, palm oil, rosin oil, with or without a suitable coloring matter,
such as imperial red. I find the following proportions give good results, but do not
limit myself thereto, as the same may be varied without departing from my
Invention:-
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Trebell in the Great Seal Patent Office on the 27th July
1880.
THOMAS TREBELL, of Limehouse, in the County of Middlesex. "AN IMPROVED
ANTI-FOULING COMPOSITION FOR SHIPS' BOTTOMS AND SUBMERGED STRUCTURES."
My Invention relates to an improved antifouling composition for ships' bottoms
and submerged structures, prepared with the following ingredients, viz. :-Black
lead, French chalk, palm oil, rosin oil, with or without a suitable coloring matter,
such as imperial red. I find the following proportions give good results, but do not
limit myself thereto, as the same may be varied without departing from my
Invention:
Black lead
French chalk
Palm oil
1
Rosin oil (of a density of 12 gallons to the cwt.) 8
parts by weight.
To the above may be added 14 lbs. of imperial red or other pigment. The palm
oil is first melted by heat or "cut down" by spirits, such as methylated spirit or
benzine, in the proportion of about 4 gallons spirits per cwt. of palm oil. The
ingredients are then mixed in tubs, or other suitable vessels, and stirred by agitators
for half an hour or longer to thoroughly incorporate them with one another. The
composition is now ready for use, and can be applied with a brush either hot or
cold, but preferably hot. To produce a composition of finer quality the ingredients
are ground together in a mill such as used for grinding paint.
Having described the nature of my Invention, and the manner of performing the
same, I declare that what I claim as my Invention to be protected by the herein-
before in part recited Letters Patent is,-
The antifouling composition compounded substantially of the ingredients herein
specified.
In witness whereof, I, the said Thomas Trebell, have hereunto set my hand
and seal this Twenty fourth day of July in the year of our Lord One
THOMAS TREBELL. (L.S.)