Improvements in the Manufacture and Treatment of Fire-proof Plastic Material for Cement.
Year: 1893

page_text: Date of Application, 27th Apr., 1893
Complete Specification Left, 28th Aug., 1893-Accepted, 14th Oct., 1893
BUTIONAL DIVIFICATION.
Improvements in the Manufacture and Treatment of Fire-proof
Plastic Material for Cement.
I, ROBERT STONE, of St. Dunstans Buildings, St. Dunstans Hill, in the City of
London, Engineer, do hereby declare the nature of my said invention to be as
follows:-
The object of my invention is to effect certain improvements in the manufacture
and treatment of the fire proof plastic material for cement described in my former
Specification for which I have obtained Letters Patent No. 16789 of 1890.
My improvements consist in adding pearl ash, potash or similar materials or
substances to the material under treatment, while in a burning or melting state, and
in about the following proportions. I mix 140 lbs., more or less, of pearl ash or
similar substance in one hundredweight, more or less, of the flux, the whole being
added to one ton, more or less, of the material being operated upon.
In some cases I may add the pearl ash, potash, or similar substances to the
material under treatment without mixing it with the flux. When the roasted or
melted material requires coloring I use manganese, sulphate of iron, or such like
material to suit the different colors. By the foregoing process an immense amount
of labour will be saved besides producing a better kind of material.
Dated 26th Amil 1902
Improvements in the Manufacture and Treatment of Fire-proof
Plastic Material for Cement.
I, ROBERT STONE, of St. Dunstans Buildings, St. Dunstans Hill, in the City of
London, Engineer, do hereby declare the nature of my said invention 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 effect certain improvements in the manufacture
and treatment of the fire proof plastic material for cement described in my former
Specification for which I have obtained Letters Patent No. 16789 of 1890.
My improvements consist in adding pearl ash, potash or similar materials or
substances to the material under treatment, described in my former Patent
No. 16789 of 1890 while in a burning or melting state, and in about the following
proportions. I mix 140 lbs. more or less of pearl ash potash or similar substance
in one hundredweight more or less of the flux the whole being added to one ton
more or less of the material being operated upon. In some cases I may add the
pearl ash potash or similar substances to the material under treatment without
mixing it with the flux. When the roasted or melted material requires coloring I
use manganese sulphate of iron, oxide of iron or such like material to suit the
different colors.
By the foregoing process an immense amount of labour will be saved besides
producing a better kind of material, in some instances I may use the raw material
from which pearl ash potash or such like substances are produced with or without
the flux.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The improvements in the manufacture and treatment of fire proof plastic
material for cement substantially as herein before described.
Dated 28th Arionat 1893