IMPROVEMENTS IN THE PRESERVATION OF PROVISIONAL SPECIFICATION
Year: 1860

page_text: LETTERS PATENT to John Pile, of West Hartlepool, in the County of
Durham, Shipbuilder, and John Robert Smyth, of the same Place,
Painter, for the Invention of "IMPROVEMENTS IN THE PRESERVATION OF
PROVISIONAL SPECIFICATION left by the said John Pile and Jo
Robert Smyth at the Office of the Commissioners of Patents, with;
their Petition, on the 14th July 1860.
We, JOHN PILE, of West Hartlepool, in the County of Durham, Shipbuilder,
and JOHN ROBERT SMYTH, of the same Place, Painter, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE PRESERVATION OF
IRON SURFACES FROM CORROSION OR DECAY," to be as follows:-
This Invention relates to a peculiar composition and enamel for protecting
iron and other surfaces from corrosion and decay, and is applicable to iron
ships, buoys, reservoirs, gas, water, and other pipes, dock gates, and to various
other useful purposes, and consists in the primary application to the surfaces
to be protected of a preparatory coating of a red composition, consisting of a
combination of litharge, Venetian red, and pine varnish, over which is applied
a coating of a composite enamel, consisting of a combination of resin, gums;
or any pitchy or bituminous substance, with the addition of coal tar or oil.
The manner in which we apply the above-named coatings is as follows:→
We first give the surfaces to be protected a coat of the composition, and

page_text: afterwards a coat of the enamel, which we pour on in a hot lava state; or we
plunge the pipes or other articles to be preserved in the melted enamel, or we
spread it over the surface with a brush. The proportions of the ingredients
used in the composition or enamel may be varied to suit especial requirements.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Pile and John Robert Smyth in the Great Seal Patent
Office on the 12th January 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
PILE, of West Hartlepool, in the County of Durham, Shipbuilder, and JOHN
ROBERT SMYTH, of the same Place, Painter, send greeting.
WHEREAS Her inost Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourteenth day of July, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-fourth year of
Her reign, did, for Herself, Her heirs and successors, give and grant
unto us, the said John Pilo and John Robert Smyth, Her special license
that we, the said John Pile and John Robert Smyth, our executors.
administrators, and assigns, or such others as we, the said John Pile and
John Robert Smyth, our executors, administrators, or assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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 "IMPROVE-
MENTS IN THE PRESERVATION OF IRON SURFACES FROM CORROSION OR DECAY," upon
the condition (amongst others) that we, the said John Pile and John Robert
Smyth, by an instrument in writing under our hands and seals, or under the
band and seal of one of us, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be per-
formed, and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that we, the said John Pile and John Robert Smyth,
do hereby declare the nature of our said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained in
and by the following statement, that is to say :-
Our said Invention relates to the application and use of a peculiar composition
and enamel for protecting iron and other surfaces from corrosion and decay,

page_text: and specially applicable for the preservation of the surface of iron ships, buoys,
reservoirs, gas, water, and other metal pipes. Also to the preservation of
wooden surfaces, such, as the exterior of the bottoms of wooden ships, railway
sleepers, piles, wooden buoys, and the wooden foundations of piers and other
structures.
In carrying out this Invention we first apply to the surface to be protected
a preparatory coating of red composition, consisting of a mixture or com-
bination of litharge, Venetian red, and pine varnish. We have obtained good
results by usng these ingredients in the following proportions, but wo do not
confine ourselves strictly thereto :-Litharge, one pound; Venetian red, one
pound; pine varnish, one gallon. Over this coating when dry we next apply
a coating of composite enamel, consisting of the following ingredients in the
following proportions, which proportions may, however, be varied more or less,
but a good effect will be obtained from those given below:-Take of black
pitch, resin, asphalt, or any pitchy or bituminous substance equal parts by
weight, and add thereto, say, twenty pounds of coal tar or oil to every one
hundred and twelve pounds of enamel.
In practice when treating surfaces with these compositions, we first apply
the red composition herein-before described, and then pour over such surface
a layer or coating of the before-mentioned composite enamel in a hot lava
state; or, where practicable, we plunge or immerse the surfaces to be preserved
in the melted enamel, or apply it thereto with a brush.
Having now described and particularly ascertained the nature of our said
Invention, and the manner in which the same is or may be used or carried into
effect, we would observe, in conclusion, that what we consider to be novel and
original, and therefore claim as the Invention secured to us by the herein-
before in part recited Letters Patent, is, the application and use of the herein-
before described red composition and composite enamel to and in the pre-
servation or protection of iron and other surfaces from corrosion and decay.
In witness whereof, I, the said John Robert Smyth, on behalf of myself
and the said John Pile, have hereunto set my hand and seal, the
Ninth day of January, One thousand eight hundred and sixty-one.