An Improved Compound for Coating Ships' Bottoms, Piles, and Structures Subject to the Influence of Sea Water.
Year: 1891

page_text: Date of Application, 2nd Nov., 1891
Complete Specification Left, 1st Sept., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by EDWARD SEARS MATHEWS, of San Diego,
State of California, United States of America, Dental Surgeon.]
An Improved Compound for Coating Ships' Bottoms, Piles, and
Structures Subject to the Influence of Sea Water.
I CHARLES HENRY MATHEWS of 82 Devonport Road, Shepherd's Bush in the
County of Middlesex, Architect, do hereby declare the nature of this invention to
be as follows:-
The object of this invention is to produce a compound for coating ships' bottoms,
wood or metal piles, and all structures of whatsoever kind which are subjected to
the action of sea water, the purpose for which such coating is applied being well
known.
In carrying out this invention, the ingredients employed are rosin, whiting, sub-
acetate of copper, bichloride of mercury, boiled linseed oil, and turpentine.
To prepare a gallon of the compound, the course of procedure is as follows:-
Take three pounds of rosin, preferably powdered, or broken into small pieces,
and mix it with two to three pints of the oil. Then heat the mass until the rosin
is completely melted. When this is effected, add in small quantities a mixture of
half a pound of subacetate of copper, and two pounds of whiting, or other suitable
material, to form a body, and stir continuously until effervescence (which commences
on the addition of the copper and whiting) ceases, and the mixture becomes of a
dark brown color.
The mixture is then taken off the fire and allowed to cool, and there is added
thereto three or two pints (as the case may be to make up 5 pints) of the oil, one
eighth of a lb. bichloride of mercury, and three pints of turpentine, and the whole is
stirred well together.
The compound is then ready for application to the surface to be coated, such
application being effected by means of a brush in the ordinary manner.
The above mentioned proportions have been found to produce good results, but
it is not intended that these proportions shall be adhered to in every case, should
the circumstances require a variation.
Dated this 2nd day of November 1891.
NEWTON & SUN,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Compound for Coating Ships' Bottoms, Piles, and
Structures Subject to the Influence of Sea Water.
I CHARLES HENRY MATHEWs of 82 Devonport Road, Shepherd's Bush in
the County of Middlesex, Architect, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The object of this invention is to produce a compound for coating ships' bottoms,
wood or metal piles, and all structures of whatsoever kind which are subjected to
the action of sea water, the purpose for which such coating is applied being well
known.
In carrying out this invention the ingredients which it is preferred, to employ
are rosin, whiting, subacetate of copper, bichloride of mercury, boiled oil and

page_text: To prepare a gallon of the compound, the course of procedure is as follows
Take three lbs. of rosin, preferably powdered or broken into small pieces, and mix
it with two to three pints of the oil. Then heat the mass until the rosin is com-
pletely melted. When this is effected, add, in small quantities, a mixture of half a
pound of sub-acetate of copper and two pounds whiting, and stir continuously until
effervescence (which commences on the addition of the copper and whiting) ceases
and the mixture becomes of a dark brown color.
The mixture is then taken off the fire, and allowed to cool, and there is added
thereto three or two pints (as the case may be, to make up in all 5 pints) of the oil,
one eighth of a lb. of bichloride of mercury, and three pints of turpentine, and the
whole is stirred well together.
The compound is then ready for application to the surface to be coated, such
application being effected by means of a brush in the ordinary manner.
The above mentioned proportions have been found to produce good results, but it
is not intended that these proportions shall be adhered to in every case, should the
circumstances require a variation.
It is also possible that other materials may be used in place of the whiting, for
instance, the object of the whiting being only to give a body to the mixture. The
rosin also, which serves as a binding material, might be dispensed with, and some
other binding material be substituted therefor, without departing from the nature
of my invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The compound for coating ships' bottoms and other structures, substantially as
herein described.
NEWTON & SON,
Agents for the Applicant.