IMPROVEMENTS IN STOPPING THE LEAKS IN AND PREVENTING CORROSION OF BOILERS, AND IN COMPOSITION THEREFOR, WHICH COMPOSITION IS APPLICABLE FOR PROTECTING OTHER SURFACES LIABLE TO EXPANSION AND CONTRACTION
Year: 1876

page_text: LETTERS PATENT to Hugh Ferguson, of Liverpool, in the County of Lancaster,
for the Invention of "IMPROVEMENTS IN STOPPING THE LEAKS IN AND
PREVENTING CORROSION OF BOILERS, AND IN COMPOSITION THEREFOR,
WHICH COMPOSITION IS APPLICABLE FOR PROTECTING OTHER SURFACES
LIABLE TO EXPANSION AND CONTRACTION."
Scaled the 26th May 1877, and dated the 29th November 1870.
PROVISIONAL SPECIFICATION left by the said Hugh Ferguson at the Office
"IMPROVEMENTS
of the Commissioners of Patents on the 29th November 1876.
HUGH FERGUSON, of Liverpool, in the County of Lancaster.
IN STOPPING THE LEAKS IN AND PREVENTING CORROSION OF BOILERS, AND IN
COMPOSITION THEREFOR, WHICH COMPOSITION IS APPLICABLE FOR PROTECTING
OTHER SURFACES LIABLE TO EXPANSION AND CONTRACTION."
In protecting the interior surface of the bottoms of high-pressure boilers by
Portland or Roman cement as is at present largely done, it is found after a short
time the cement cracks and peels off the iron, leaving the surface as liable to
leakage and corrosion as heretofore. To avoid this evil I have designed this
Invention, which consists in mixing with the cement coal tar, pitch, asphalt, or
other viscid material and bran, ground chaff, or other pulverulent absorbent
material. The result is a hard elastic mass which seeks out all crannies and
apertures, leaks, &c., and fills them up, which sticks tight to the boiler shell and
prevents the access of water. Should a leak occur the semi-fluid or viscid nature
of the tar and pulverulent nature of the bran causes these two to run into the leak
and fill it up.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Hugh Ferguson in the Great Seal Patent Office on the 29th May
1877.
HUGH FERGUSON, of Liverpool, in the County of Lancaster.
"IMPROVEMENTS
IN STOPPING THE LEAKS IN AND PREVENTING CORROSION OF BOILERS, AND IN
COMPOSITION THEREFOR, WHICH COMPOSITION IS APPLICABLE FOR PROTECTING
OTHER SURFACES LIABLE TO EXPANSION AND CONTRACTION."

page_text: In protecting the interior surface of the bottom of high-pressure boilers by Port-
land and Ronan cement as is at present largely done, it is found after a short time
the cement cracks and peels off the iron, leaving the surface as liable to leakage and
corrosion as heretofore. To avoid this evil I have designed this Invention, which
consists in mixing with the cement coal tar, pitch, asphalt, or other viscid material,
and bran, ground chaff, or other pulverulent absorbent material. The result is a
hard clastic mass which seeks out all crannies and apertures, leaks, etcetera, and fills
them up, which sticks tight to the boiler shell and prevents the access of water.
Should a leak occur the semi-fluid or viscid nature of the tar and pulverulent nature
of the bran causes these two to run into the leak and fill it up.
In mixing I take about 10 gallons of tar and 3 hundredweight of Portland
cement, and add bran or other similar pulverulent matter till the whole mixes into
a good stiff paste, into which a man can just press his finger. If it is not hard
enough add more cement; if it is inclined to be crumbly, add more tar. I also, for
use in steamships, I add cast-iron borings. Exact proportions cannot be given as
they vary so very much with the quality of the materials used, and very large
latitude can be given without practical injury.
I claim as my Invention, protected under the herein-before in part recited Letters
Patent,―
1st. The mode described of preventing leaks in the bottoms of internally fired
boilers and other similar structures by coating them internally with a viscid
material.
2. The composition for the purposes described, consisting of a mixture of (a)
hydraulic cement; (b) tar, pitch, asphalt, or other bituminous matter; and (c) bran or
other pulverulent, fibrous, or absorbing material, with or without cast-iron borings.
In witness whereof, I, the said Hugh Ferguson, have hereunto set my hand
and scal, this Twenty-eighth day of May, in the year of our Lord 1877.
Witness,
W. P. THOMPSON,
British & Foreign Patent Agent,
G, Lord Street,
Liverpool.
HUGH FERGUSON. (L.S.)