IMPROVEMENTS IN THE " TREATMENT AND PREPARATION OF CERTAIN CALCAREOUS MATERIALS FOR USE IN PLASTIC CONSTRUCTION
Year: 1884

page_text: I ROBERT STONE, of 23 Leadenhall Street, in the City of London, Engineer,
do hereby declare the nature of my Invention for IMPROVEMENTS IN THE
"
TREATMENT AND PREPARATION OF CERTAIN CALCAREOUS MATERIALS FOR USE IN
PLASTIC CONSTRUCTION" to be as follows:-
The object of my invention is to prepare chalk, lime, gypsium, and analogous.
materials, in a superior manner.
I saturate or soak the chalk, lime, gypsium and analogous materials, in oil of
vitriol or sulphuric acid, either in suitable tanks or in the kilns as the material is
loaded in, whereby the oil of vitriol becomes thoroughly incorporated with the
material.
When the material has been sufficiently baked or burnt, I crush and grind the
same to powder by machinery made in accordance with my former inventions
for that purpose respectively described in Specifications Number 253579 and
Number 207080.
When the material has been prepared as before described, it is ready for use in
the ordinary way.
By this simple and novel method of infusing or incorporating oil of vitriol or
sulphuric acid with the material, plaster of the very highest quality is obtained
suitable for use in any climate or condition of atmosphere, it being proof against
water and damp, and suitable for inside or outside work besides being specially
adapted for ceilings, cornices, columns, statuary, ornamental stucco and plaster work
of all kinds. The effect of the admixture of oil of vitriol or sulphuric acid is to
cause an intense heat, at the time of mixing; and it acts on the material so as to
greatly reduce its bulk, and afterwards prevents it from contracting, blistering, or
cracking, when worked up, and increases its durability and hardness besides being
specially plastic and pliable in the working.
6
11001

page_text: DI PULICATION.
I ROBERT STONE of 23 Leadenhall Street in the City of London, Engineer,
do hereby declare the nature of. my Invention for IMPROVEMENTS IN THE
TREATMENT AND PREPARATION OF CERTAIN CALCAREOUS MATERIALS FOR USE IN
PLASTIC CONSTRUCTION, 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 my invention is to prepare chalk, lime, gypsum and analogous
materials, in a superior manner.
. I saturate or soak the chalk, lime, gypsum and analogous materials in oil of
vitriol or sulphuric acid, either in suitable tanks or in the kilns as the material is
loaded in, whereby the oil of vitriol becomes thoroughly incorporated with the
material.
:
When the material has been sufficiently baked or burnt, I crush and grind the
same to powder by any suitable machinery.
When the material has been prepared as before described, it is ready for use in
the ordinary way.
By this simple and novel method of infusing or incorporating oil of vitriol or
sulphuric acid with the material, plaster of the very highest quality is obtained
suitable for use in any climate or condition of atmosphere, it being proof against
fire, water, and damp, and suitable for inside or outside work besides being specially
adapted for ceilings, cornices, columns, statuary, ornamental stucco and plaster work
of all kinds: The effect of the admixture of oil of vitriol or sulphuric acid is to
cause an intense heat, at the time of mixing; and it acts on the material so as to
greatly reduce its bulk, and afterwards prevents it from contracting, blistering, or
cracking, when worked up, and increases its durability and hardness besides being
specially plastic and pliable in the working.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
The treatment and preparation of chalk, lime, gypsum, and analogous materials
by saturating or soaking the same in oil of vitriol or sulphuric acid in the manner
and for the purposes substantially as hereinbefore described...