of Submerged Surfaces.
Year: 1888

page_text: of Submerged Surfaces.
We, JOHN OGLE WALLACE and WILLIAM WARD both of New Quay North Shields
Northumberland, Paint Manufacturers, do hereby declare the nature of our invention,
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This invention consists in an improved composition or compositions to be applied to
ships-bottoms and other submerged surfaces for the purpose of preserving the same
from barnacles, shell-fish and other vegetation or the like."
For this purpose we prepare two compounds or compositions to be applied to such
surfaces, the first composition being substantially an anti-corrosive compound and
the second or covering composition more especially an anti fouling compound.
The first or anti-corrosive composition preferably consists of the following substances
or their equivalents in the proportions given or others near thereto.
No. 1 Refined Petroleum (preferably about 700 gravity
and flashing at 100° F.)
Parts
25
"
2 Gum Kauri or other resinous gum-
-
-
-10
3 Stockholm tar
-
-
4
"
"
4 Tallow (preferably best Russian or that known in
5
Oxide of Zinc
commerce at P.Y.C.)
-
-
-
-
-
5
-
15
"
"
6
Red oxyde of iron
-
20
"
7 Sugar of Lead ground in oil -
3
"
8 Pine varnish (preferably known as "Special quality")
"
9 Stockholm tar pitch
4
"
10 Gutta percha in solution
To these materials a small per centage of red lead may be added.
In preparing the composition from these ingredients Nos. 2, 3, 4, 8, 9, 10 are placed
in an iron vessel or boiler over a slow fire, said boiler being provided with agitators
which are kept in motion to prevent the destruction of any of the ingredients through
over heating or burning until the whole of the above ingredients are dissolved and
incorporated.

page_text: Nos. 1, 5, 6, 7 are placed in a separate vessel or mixer fitted with agitators which
are set in motion until the four said ingredients are thoroughly mixed.
While the mixture of ingredients 2, 3, 4, 8, 9, 10 is still warm, the mixture of ingre-
dients 1, 5, 6, 7 is added thereto, the vessel containing same is made air tight and the
agitators are set in action until the whole is completely mixed, the composition
thereupon remains in the mixer to cool and when cold is transferred to casks or other
air tight.vessels and after about 48 hours is ready for use.
The second or anti-fouling composition comprises the following ingredients substan-
tially in the proportions given
Nos. 1, 5, 6, 7 are placed in a separate vessel or mixer fitted with agitators which
are set in motion until the four said ingredients are thoroughly mixed.
While the mixture of ingredients 2, 3, 4, 8, 9, 10 is still warm, the mixture of ingre-
dients 1, 5, 6, 7 is added thereto, the vessel containing same is made air tight and the
agitators are set in action until the whole is completely mixed, the composition
thereupon remains in the mixer to cool and when cold is transferred to casks or other
air tight.vessels and after about 48 hours is ready for use.
The second or anti-fouling composition comprises the following ingredients substan-
tially in the proportions given i
No. 1 Petroleum (as before)
2 Gum Kauri or other resinous gum
3 Resin oil
-
4 Best snow flake white zinc
5 Best pine varnish
6 Acetate of copper
7 Oxyde of copper red or black
8 Mineral Green dry or powdered
9 Venetian red
10 Best sugar of lead
do.
do.
These ingredients are combined as follows:
15
8
4
20
13
10
3
7
12
8
Nos. 1, 2, 4, 7, 8, 9, 10 are placed in a vessel or mixer which may be termed
"Mixer No. 1." This mixer is fitted with agitators driven by suitable power, the same
being kept in motion while the substances aforesaid are put in the mixer.
Ingredients No. 3. 5. 6 are then placed in a strong iron boiler or vessel fitted with
agitators, known as Mixer No. 2. This mixer is heated by a slow fire and the contents
agitated until No. 6 ingredient (acetate of copper) is dissolved. The said mixers No. 1
and No. 2 are connected by a pipe, generally a six-inch iron pipe passing from the top
of the No. 2 mixer to the other mixer. Through said pipe all gases and fumes poisonous
or otherwise pass from the No. 2 into the No. 1 mixer. In all other respects the
mixers are closed steam-tight during the operations to prevent escape of any gases
having antifouling properties. The agitators in the mixers are kept in action until
the ingredients in No. 2 mixer are dissolved. The mixtures are then allowed to cool
and the contents of No. 2 mixer transferred to No. 1 mixer. After complete incor-
poration of these mixtures, the antifouling composition so formed may be run off into
casks or other air tight vessels and after about 48 hours will be ready for use.
The said compositions are of different colours and therefore easily distinguishable.
The ships bottom or other surface is first coated with the first or anti-corrosive com-
position, and when the same is dry may then be coated with the second or antifouling
composition.
We do not confine ourselves to the proportions here shown nor yet to the employment
of all the said ingredients. The same may also be combined in a different manner or
by different processes.
21
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The anti-corrosive and antifouling compositions substantially as herein set forth.
ted this 24th day of January 1888.
HERBERT & Co.,
18, Buckingham Street, Strand, W.C., London,
Agents to Applicants.