IMPROVE- MENTS IN THE COMPOSITION AND PREPARATION OF PRESERVATIVE AND ANTI- COMO AND ATHED SUBSTANCES.OULING
Year: 1874

page_text: LETTERS PATENT Walter Chidiock Nangle, of Bull Point, near
Devonport, C of Devon, late Captain Royal Artil, Assistant-
Controller Bull Point Establishment, for the Invention of " IMPROVE-
MENTS IN THE COMPOSITION AND PREPARATION OF PRESERVATIVE AND ANTI-
COMO AND ATHED SUBSTANCES.
"
PROVISIONAL SPECIFICATION left by the said Walter Chidiock Nangle
at the Office of the Commissioners of Patents, with his Petition, on
the 13th February 1874.
I, WALTER CHIDIOCK NANGLE, of Bull Point, near Devonport, C³ of
Devon, late Captain Royal Artily, Assistant-Controller Bull Point
Establishment, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE COMPOSITION AND PREPARATION OF PRESERVATIVE AND
ANTI-FOULING COMPOUNDS OR PAINTS FOR COATING METALS AND OTHER SUBSTANCES,"
to be as follows:-
66
anti-
My Invention relates to that class of compounds known as
fouling." It consists in the process of preparing a compound incorpo-
rating all the ingredients hercin-after specified, and also in the

page_text: incorporation of aloes and barytes, or of either, but more particularly of
aloes, with one or more of the said ingredients.
I prepare the compound to which I give preference for coating ships'
bottoms in the following manner :—
a. I put into a pan or boiler about equal quantities of tallow and
resin (say about 60lbs. of cach), together with about one quart of
powdered bark of quercus or laryx or other bark or tanning substance ;
boil this mixture for about an hour, more or less, then remove remains
of bark and every substance like dregs or impurities, rake out the fire,
and let the mixture cool to lukewarm.
b. I prepare a mixture of about 3lbs. of chrome yellow (or other
analogous coloring matter) with about 8lbs. of iron ore ground in oil,
and add this to a while cooling, stirring vigorously.
c. I then add to a and b mixed about six quarts of carbonate of
barytes.
d. I now take about one lb. (more or less) of powdered aloes to every
gallon of compound being made, mix it with spirits of turpentine or oil
or other liquid to about the usual consistency of mixed mustard, and
pour this mixture into that of a, b, and c, when this latter is at its
coolest temperature, before it sets, and stir up vigorously.
The compound is now completed with adding a decoction of capsicums
or peppers, also the pea of the abrus precatorius and carbolic acid in
spirits of wine or oil or turps, or boiled in oil or used with any other
liquid or grease, or the mixture (or compound being made) itself, or
merely soaked therein, or macerated in any of these just before the last
step d. This compound has to be melted before application to the bottom
of a ship or elsewhere. This should be effected by placing the vessel
containing it in hot water or otherwise.
For certain applications I may elect to use oil in place of tallow, or
tallow boiled with barytes and without resin, or a fat oil boiled with
barytes and without tallow or resin, and with or without bark.
I may also elect to modify d by grinding the aloes with some of the
tallow and resin (a), and then adding it to a, b, and c, or I may incor-
porate the aloes with the compound without previous admixture with
other matter.

page_text: The incorporation of bark or tanning substance in antifouling com-
pounds gives (as set forth in the Specification to my Patent, No. 495,
A.D. 1873) great toughness thereto; 6 gives to the compound astringent
and drying properties; and c, and more particularly d, are most powerful
enemies to vegetable and animal marine substances, as is also the com-
pound of abrus precatorius, capsicums, and carbolic acid.
10 m pursuance of the conditions of the Letters Fatent,
filed by the said Walter Chidiock Nangle in the Great Scal Patent
Office on the 13th June 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WALTER
CHIDIOCK NANGLE, of Bull Point, near Devonport, Cy of Devon, late
Captain Royal Artillery, Assistant-Controller Bull Point Establishment,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of February, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Walter Chidiock Nangle, Her special
licence that I, the said Walter Chidiock Nangle, my executors, admi-
nistrators, and assigns, or such others as I, the said Walter Chidiock
Nangle, my 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
"IMPROVEMENTS IN THE COMPOSITION AND PREPARATION OF PRESERVATIVE AND
ANTI-FOULING COMPOUNDS OR PAINTS FOR COATING METALS AND OTHER SUBSTANCES,"
upon the condition (amongst others) that I, the said Walter Chidiock
Nangle, my executors or administrators, by an instrument in writing
under my, 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 imme-
diately after the date of the said Letters Patent.

page_text: composition of the aforesaid compound or paint a, b, c, and d, and with
or without the incorporation of e.
In witness whereof, I, the said Walter Chidiock Nangle, have here-
unto set my hand and seal, this Twenty-eighth day of May, in
the year of our Lord One thousand eight hundred and seventy-
four.