Year: 1886

page_text: I, GEORGE ARTHUR JARVIS Stafford Street, St. Georges, Wellington, Salop
Metallurgical Chemist, do hereby declare the nature of this invention to be as follows:-
-
I take hard burnt magnesian lime or hard burnt lime, grind & mix with it a small
percentage of some one or two of the following substances in fine powder.
Fluor spar, Carbonate of soda, Silicate of soda, Nitrate of Calcium, Chloride of
Calcium chloride of Magnesium.
The mixed material is then pressed by hydraulic or other power or rammed into
iron moulds of the desired shape (and these moulds may be either plain or glazed)
and the cover of the mould keyed or otherwise securely fastened down on to the
pressed material. The iron moulds containing the pressed or rammed material are
then transferred to a stove or furnace and heated sufficiently to cause the particles
of hard burnt magnesian lime or hard burnt lime and the admixed substance or
substances as "Fluor spar, Carbonate of Soda, Silicate of soda, Nitrate of Calcium,
Chloride of Calcium Chloride of Magnesium," to adhere together.
When cooled the moulds are taken off and the bricks heated to a high temperature
in a suitable furnace in order to consolidate them to the utmost degree. Or the
bricks, when stripped of the moulds may be used direct but I prefer that they should
be heated a second time strongly.

page_text: COMPLETE SPECIFICATION.
Manufacture of Improved Basic Bricks.
I, GEORGE ARTHUR JARVIS of Stafford Street, St. George's near Wellington,
Shropshire Metallurgical Chemist, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention has for its object, the manufacture and production of Basic Bricks
which are both more enduring and lasting than those used at present.
I take hard burnt magnesian lime or hard burnt line, grind and mix it thoroughly
with a small percentage of some one or two of the following substances in fine
powder, such as, Fluor spar, Carbonate of soda, Silicate of soda, Nitrate of Calcium,
Chloride of Calcium, Chloride of Magnesium.
The mixed material is then rammed or pressed by hydraulic or other power into
iron moulds (which may be preferably glazed) of the shapes of the desired bricks and
the covers of the moulds securely keyed or fastened down upon the pressed material.
The moulds containing the pressed mixed material are then transferred to a stove or
furnace and heated sufficiently to cause the particles of hard burnt lime or magnesian
lime and the admixed substance, as Fluor spar, Carbonate of soda, Silicate of soda,
Nitrate of Calcium, Chloride of Calcium Chloride of magnesium, to adhere together.
I find that common soda-ash (a cheap form of Carbonate of soda) answers
admirably but I prefer that it be fused before being ground & mixed with the hard
burnt lime or magnesian lime.
Ordinarily 5 to 10% of such additions is ample. When cooled, the moulds are
taken off the bricks, which should be quite hard and firm; sufficiently so, that they
may be used direct but I prefer that they should be heated a second time, to a high
temperature, in a suitable kiln or furnace, in order to consolidate the bricks thoroughly
throughout.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, I declare that what I claim is
The process of mixing such salts as herein before mentioned with lime or magnesian
lime, pressing the dry and pulverulent mixture in iron moulds and causing the
whole to combine and consolidate together by the aid of heat.
GEORGE A. JARVIS.