A NEW OR IMPROVED MANUFACTURE OF COMPOUND APPLICABLE AS CEMENT OR MORTAR, OR AS MATERIAL OF BRICKS, TILES, SLABS OR ARTIFICIAL STONE
Year: 1883

page_text: LETTERS PATENT to John Imray of No 28 Southampton Buildings Chancery
Lane in the County of Middlesex for an Invention of "A NEW OR IMPROVED
MANUFACTURE OF COMPOUND APPLICABLE AS CEMENT OR MORTAR, OR AS
MATERIAL OF BRICKS, TILES, SLABS OR ARTIFICIAL STONE communicated to
him from abroad by Emile Pick of Paris France
"
PROVISIONAL SPECIFICATION left by the said John Imray at the Office
of the Commissioners of Patents on the 14th March 1883.
JOHN IMRAY of No 28 Southampton Buildings, Chancery Lane in the County
of Middlesex "A NEW OR IMPROVED MANUFACTURE OF COMPOUND APPLICABLE
AS CEMENT OR MORTAR, OR AS MATERIAL OF BRICKS, TILES, SLABS OR ARTIFICIAL
STONE" [communicated to him from abroad by Emile Pick of Paris France]
This invention relates to the manufacture of a compound, called Neo-plaster,
which can be used as cement or mortar, or can be agglomerated into bricks, tiles
or slabs, or into blocks to form artificial stone. The object of the invention is to
utilise for this purpose cheap materials, that by an inexpensive and easy process
are converted into a cement which can be readily applied to all uses for which
cements are employed, and which, when applied, has great adhesion and durability,
which is very light, sets rapidly and resists heat, moisture and frost. The principal
ingredient of the compound, about 75 per. cent of the whole, is gypsum or hydrated
sulphate of lime, and the other ingredients are marl, feldspar and coke dust, or any
matter containing iron. These materials are thoroughly pulverised and mixed, but
in cases where there is dampness such as would render the mixture pasty, they
should, in the first place, be dried by steam heat or the waste heat of a flue. The
ground mixture is sifted, the larger fragments being ground again, until the whole
is thoroughly pulverized. The powdered compound is then heated, care being
taken to heat it equably, for which purpose may be employed heating and agitating
apparatus such as is used for the distillation of schists, or any apparatus which
keeps all parts of the powdered mixture uniformly exposed to the heating influence.
After being thoroughly heated to a temperature which should not exceed 650° Fah*.,

page_text: the compound is cooled and ready for use, or to be packed in bags or other
receptacles for transport. It is, however, of advantage to pass it, in the first place,
through a revolving sieve, so as to prevent agglomeration and to ensure the
required degree of fineness.
In applying the compound, it can be mixed with sand to be used as a mortar, a
cement or plaster, or it can be mixed with pulverised pumice stone and colouring
matters to form artificial stones resembling marble, or it can be moulded into the
forms of bricks, tiles or slabs, and these can be rendered light and strong by addition
of fibrous materials, such as wood shavings, to the compound.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Imray in the Great Seal Patent Office on the 14th September
1883.
"
JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the County
of Middlesex " A NEW OR IMPROVED MANUFACTURE OF COMPOUND APPLICABLE
AS CEMENT OR MORTAR, OR AS MATERIAL OF BRICKS, TILES, SLABS OR ARTIFICIAL
STONE A communication to me from Abroad by Emile Pick of Paris, France.
This invention relates to the manufacture of compound called Neo-plaster,
which can be used as cement or mortar, or can be agglomerated into bricks, tiles
or slabs, or into blocks to form artificial stone. The object of the invention is to
utilise for this purpose cheap materials, that by an inexpensive and easy process
are converted into a cement which can be readily applied to all uses for which
cements are employed, and which, when applied, has great adhesion and durability,
which is very light, sets rapidly and resists heat, moisture and frost. The principal
ingredient of the compound, about 75 per. cent of the whole, is gypsum or hydrated
sulphate of lime, and the other ingredients are about 10 per cent of coke dust or
any similar matter preferably containing a little iron, and about 15 per cent of
marl or feld-spar, or a mixture of these. Excess of marl gives great hardness, but
the material is slow in setting. For light work, feld-spar is preferred. When
marl is used alone, it is better to add a little slag to facilitate vitrification. These
materials are thoroughly pulverised and mixed, but in cases where there is
dampness such as would render the mixture pasty, they should in the first place,
be dried by steam heat or waste heat of a flue. The ground mixture is sifted,
the larger fragments being ground again, until the whole is thoroughly pulverised.
The powdered compound is then heated, care being taken to heat it equably, for
which purpose may be employed heating and agitating apparatus such as is used
for the distillation of schists, or any apparatus which keeps all parts of the
powdered mixture uniformly exposed to the heating influence.
After being
thoroughly heated to a temperature which should not exceed 650° Fahr., the
compound is cooled and ready for use, or to be packed in bags or other receptacles
for transport. It is, however, of advantage to pass it, in the first place through
.

page_text: a revolving sieve, so as to prevent agglomeration and to ensure the requisite degree
of fineness. Care should be taken to avoid dampness in the apartments where the
material is prepared and packed.
In applying the compound, it can be mixed with sand to be used as a mortar,
cement or plaster, or it can be mixed with colouring matters to form artificial
stones resembling marble, or it can be moulded into the forms of bricks, tiles or
slabs, and these can be rendered light and strong by addition of fibrous inaterial
such as wood shavings to the compound.
Having thus described the nature of this invention, and in what
manner
the same is to be performed as communicated to me by my foreign correspondent,
I claim :-
The manufacture of compound applicable as cement or mortar, or as material
of bricks, tiles, slabs or artificial stone, substantially as herein described
In witness whereof I the said John Imray have hereunto set my hand and
seal this Fourteenth day of September in the year of our Lord One thousand eight
hundred and eighty three.