AN IMPROVED COMPOSITION FOR AND SYSTEM OF ROOFING, GLAZING, AND PRESERVING BUILDINGS
Year: 1879

page_text: LETTERS PATENT to John Edward Walsh, of Waterhouse Chambers, Crossley
Street, Halifax, in the County of York, Patent Agent, for the Invention of
"AN IMPROVED COMPOSITION FOR AND SYSTEM OF ROOFING, GLAZING, AND
PRESERVING BUILDINGS." A communication from abroad by Friedrich August
Reichel, of Leipzic, Saxony, in the German Empire.
PROVISIONAL SPECIFICATION left by the said John Edward Walsh at the
Office of the Commissioners of Patents on the 12th November 1879.
JOHN EDWARD WALSH, of Waterhouse Chambers, Crossley Street, Halifax, in the
County of York, Patent Agent. "AN IMPROVED COMPOSITION FOR AND SYSTEM
OF ROOFING, GLAZING, AND PRESERVING BUILDINGS." A communication from
abroad by Friedrich August Reichel, of Leipzic, Saxony, in the German Empire.
This improvement consists in effecting the combination of glass with iron. The
inventor has succeeded in perfecting a system of roofing buildings which presents
enormous advantages over the ordinary slate, tile, and other rooting systems,
inasmuch as it is indestructible by fire or weather influences, and requires no
repairs.
Spouts glazed with this preparation never require a further coating, nor do they
ever rust.
The glaze is composed of the following materials:-
4 parts pounded glass.
2 parts spar.
3 parts borax.
1 part saltpeter.
part oxide of zinc.
This combination is well mixed and melted in a crucible; the melted mass is
then pounded and mixed with water, and ground in a stone mill. To obtain a blue
shade about half an ounce of cobalt is added to each pound of the mixture.
The sheet iron plates are coated with this prepared mixture, dried, placed in a

page_text: mould, and exposed to red hod heat, by which means durability, brilliancy, and
firm combination of the glass and iron is obtained.
These glazed iron armour roofing plates can be produced in all colors, as :-
Blue by means of oxide of cobalt.
Green
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Red
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Black
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Brown
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Grey
White
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subcarbonate of potassa mixed with sulphur.
(this produces a clear leaf-green.)
ammonia.
oxide of manganese.
oxide of iron.
2 parts oxide of tin and 1 part oxide of manganese.
oxide of tin.
The glazed iron armour roofing plates can be produced in various sizes a
strengths.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Edward Walsh in the Great Seal Patent Office on the 12th
May 1880.
JOHN EDWARD WALSH, of Waterhouse Chambers, Crossley Street, Halifax, in the
County of York, Patent Agent. "AN IMPROVED COMPOSITION FOR AND SYSTEM
OF ROOFING, GLAZING, AND PRESERVING BUILDINGS." A communication from
abroad by Friedrich August Reichel, of Leipzic, Saxony, in the German Empire.
This improvement consists in effecting the combination of glass with iron,
whereby the inventor has succeeded in perfecting a system of glazing iron for
roofing buildings which has great advantages when compared with the ordinary
slate or pot tile and other roofing systems, inasmuch as it is indestructible by fire
or weather influences, and consequently requires no repairs.
Spouts glazed with this preparation never require a further coating, nor do they
ever rust. The glaze is composed of the following materials:-
Four parts of pounded glass.
Two parts of pounded spar.
Three parts of pounded borax.
One part of pounded saltpetre.
One fourth of a part of pounded oxyde of zinc.
This combination is well mixed by stirring when melted together in a crucible,
the melted mass is when cold pounded, mixed with water, and ground in a mortar
or stone mill; to obtain a blue shade or color about half an ounce of cobalt is
added to each pound of the mixture. Sheet iron plates are then coated with this
prepared mixture, dried, placed in a mould, and exposed to a red hot heat, by means
of which durability, brilliancy, and a firm combination of the glass and iron are
obtained. The glazed iron plates can be made in any color by adding,―
For blue, adding oxyde of cobalt.
For green, adding subcarbonate of potassia mixed with sulphur.
(produces a clear leaf green.)
For red, adding ammonia.
For black, adding oxyde of manganese.
For brown, adding oxyde of iron.
For white, adding oxyde of tin.
For grey, adding two parts oxyde of tin, and one part oxyde of manganese.
The plates can also be made in any thickness and size.
Having thus fully described the nature and particulars of the said Invention, I
would have it understood that I claim,―
The glazing of iron for roofing and other purposes in the manner herein
Witness,
5
JOHN EDWARD WALSH. (L.S.)
CHARLES FREDERICK DALTON,
Draughtsman to John E. Walsh,
Patent Agent & Consulting Engineer,
Halifax,
Yorkshire.