AN IMPROVED ARTIFICIAL STONE
Year: 1884

page_text: We, JOSEPH THOMPSON of 2 Vallier Road, College Park, Willesden in the
County of Middlesex, Carpenter, and JOHN HENRY BRYANT of 45 and 46 Palace
Chambers, in the City of Westminster, Gentleman, do hereby declare the nature of
our invention for AN IMPROVED ARTIFICIAL STONE to be as follows:―
The object of, this invention is to produce an artificial stone which is more
particularly suitable for paving and flooring purposes, but which when formed into
blocks may be used for retaining, and other, walls, the stone being quite impervious
to moisture and fireproof.
The invention consists in the employment of Portland cement, Granite chippings,
Iron Slag and Silicate of Soda, which are mixed together in certain proportions
with the requisite quantity of water in the manner usual in making concrete.
The mass when mixed may be laid in situ. or made into blocks or slabs in
moulds, slight pressure by means of a rammer, or otherwise, being employed in
order to express the air and to give the mass homogeneity.
The proportions which we prefer to employ are
The granite should be crushed to the size capable of passing through a 1-inch
mesh, and the iron slag through a one-inch mesh and, these two ingredients with
the Portland cement are thoroughly mixed dry.
The requisite quantity of the Silicate of soda is first dissolved in the water and .
the water is then applied to the heap of dry material by preference in fine streams,
say, from the rose of a watering pot, and the whole mass is turned over two or
three times as in making concrete.

page_text: The mass may be then laid in situ or made into slabs or blocks as before
mentioned, and should be allowed to remain a short time, in order to set before
being used.
The Portland cement, it will be evident, is used as the binding material and the
granite to give body. The iron slag gives hardness and durability as well as the
fireproof quality of the material, while the silicate of soda accelerates the drying of
the mass.
We may here remark we do not intend to confine ourselves to the proportions
above stated but those proportions give what wo believe to be the best result.

page_text: WE JOSEPH THOMPSON of 2 Vallier Road, College Park, Willesden, in the
County of Middlesex, Carpenter, and JOHN HENRY BRYANT of 45 and 46 Palaco
Chambers. in the City of Westminster Gentleman do hereby declare the nature of
our invention for "AN IMPROVED ARTIFICIAL STONE," and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:―
The object of this invontion is to produce an artificial stone which is more
particularly suitable for paving and flooring purposes but which when formed into.
blocks may be used for retaining and other walls the stone being quite impervious
to moisture and fire proof and of great durability.
The invention consists in the employment of Portland cement, Granite chippings,
Iron Slag and Silicate of Soda which are mixed together in suitable proportions
with the requisite quantity of water in the manner usual in making concrete.
The mass when mixed may be laid in situ or made into blocks or slabs in moulds
slight pressure by means of a rammer or otherwise being employed in order to
express the air and to give the mass homogeneity.
The proportions which we prefer to employ are Portland cement 15 parts by
as desired any suitable pigment to give any desired colour to the stono to bo
produced.
The granite should be crushed to a size capable of passing through a + inch mesh
and the iron slag through a half inch mesh and these two ingredients with the
Portland cement are thoroughly mixed together in a dry state.
The requisite quantity of the Silicate of Soda is dissolved in the water and the
water is then applied to the heap of dry material by preferenco in fine streams say
from the rose of a watering pot and the whole mass is turned over two or three
times as in making concrete..
The mass may be then laid in situ or made into slabs or blocks in moulds as
before mentioned and should be allowed to set before use.
The Portland cement is used as the binding material and the Granite to give
body. The Iron Slag gives hardness and durability as well as the fire proof
quality of the material while the Silicate of Soda accelerates the drying and
increases the hardness and durability of the stone.
We may here remark we do not intend to confine ourselves to the proportions
above stated but these proportions give. what we believe to be the best result.

page_text: Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
In the manufacture of artificial stone the use in combination of Portland cement
Granite chippings, Crushed Iron Slag, Silicate of Soda and water in or about the 5
proportions herein set-forth.