IMPROVEMENTS IN COMPOSITION FOR APPLYING TO RAILWAY ARCHES AND OTHER STRUCTURES TO RENDER THE SAME WATERPROOF, AND IN THE METHOD OF APPLYING SUCH COMPOSITION
Year: 1878

page_text: LETTERS PATENT to Hamor Lockwood, of Manchester, in the County of Lan-
caster, for the Invention of "IMPROVEMENTS IN COMPOSITION FOR APPLYING TO
RAILWAY ARCHES AND OTHER STRUCTURES TO RENDER THE SAME WATERPROOF,
AND IN THE METHOD OF APPLYING SUCH COMPOSITION."
Sealed the 6th December 1878, and dated the 1st October 1878.
PROVISIONAL SPECIFICATION left by the said Hamor Lockwood at the Office
of the Commissioners of Patents on the 1st October 1878.
"IMPROVEMENTS
HAMOR LOCKWOOD, of Manchester, in the County of Lancaster.
IN COMPOSITION FOR APPLYING TO RAILWAY ARCHES AND OTHER STRUCTURES TO
RENDER THE SAME WATERPROOF, AND IN THE METHOD OF APPLYING SUCH COM-
POSITION."
The object of this Invention is to render railway arches, bridges, viaducts, and
other structures waterproof by the application thereto of the following composition
in the manner herein-after described.
The composition is formed by the admixture in about equal parts of the following
ingredients, namely, coal tar, pitch, Archangel pitch, Stockholm tar, cotton seed oil,
anthracine oil, and resin.
The above composition being well mixed and heated a coating of the same about
half an inch thick is first laid on the top of the arch or bridge, and then a light
coating of varnish applied hot, followed by a layer of "brattice cloth," then
another coat of varnish, and next a layer of roofing felt, and a third coat of varnish,
after which I apply a second coat of "brattice cloth," and finish off with a half
inch coating of the first-named mixture or composition.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Hamor Lockwood in the Great Seal Patent Office on the 28th March
1879.
HAMOR LOCKWOOD, of Manchester, in the County of Lancaster. "IMPROVEMENTS
IN COMPOSITION FOR APPLYING TO RAILWAY ARCHES AND OTHER STRUCTURES TO
RENDER THE SAME WATERPROOF, AND IN THE METHOD OF APPLYING SUCH COM-
POSITION."
The object of this Invention is to render railway arches, bridges, viaducts, and
other structures waterproof by the application thereto of the following composition
in the manner herein-after described.
The composition is formed by the admixture in about equal parts of the following
ingredients, namely, coal tar, pitch, Archangel pitch, Stockholm tar, cotton seed oil,
anthracine oil, and resin.
The above composition being well mixed and heated a coating of the same about
half an inch thick is first laid on the top of the arch or bridge, and then a light
coating of varnish applied hot, followed by a layer of "brattice cloth," then
another coat of varnish, and next a layer of roofing felt, and a third coat of varnish,
after which I apply a second coat of "brattice cloth," and finish off with a half
inch coating of the first-named mixture or composition.
Having now described the nature and object of my said Invention, together with
the manner in which the same is to be or may be performed or carried into
practical effect, I wish it to be understood that I claim as my Invention, the
manufacture and use or application of the waterproofing composition, substantially
in the manner and for the purposes above particularly set forth and described.
In witness whereof, I, the said Hamor Lockwood, have hereunto set my hand'
and seal, this Twenty-seventh day of March, in the year of our Lord One
thousand eight hundred and seventy-nine.
HAMOR LOCKWOOD. (L.S.)