Manufacture of Refractory Crucibles, Pots, Bricks, and Lumps
Year: 1887

page_text: Date of Application, 20th July, 1887
Complete Left, 22nd May, 1888
Complete Accepted, 20th July, 1888
[Communicated from abroad by ADAM MOSZCZENSKY, of 24, twelfth line, Ismailsky
Polk, St. Petersburg, Russia, Count of the Russian Empire.]
Manufacture of Refractory Crucibles, Pots, Bricks, and Lumps
I, JOHN IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the County
of Middlesex, Consulting Engineer and Patent Agent, do hereby declare the nature of
this invention to be as follows:-
This invention relates to the manufacture of refractory crucibles, pots, bricks or
lumps used in furnaces exposed to an intense heat. For this purpose about 30 parts
by weight of fragments of highly refractory fire clay, about 20 parts of pulverised
blast furnace slag, about 20 parts of broken bottle or other glass also pulverised and
about 5 parts of crude sulphur are mixed together and heated until the mixture is
partly fused into a pasty condition. When it is in this state, about 25 parts by weight
of shredded asbestos are stirred into the mass, and the mixture, then in the form of
thick paste or pulp, is run into moulds of the form desired. These moulds before
receiving the pasty material are lined with a layer of shredded asbestos applied more
particularly to those parts of the moulds which are to shape the exposed faces of the
moulded articles. The material is then baked in the moulds until the moulded articles
become firm and solid. After cooling, they are removed from the moulds presenting
on their surfaces the adhering layers of asbestos with which the moulds were lined,
and they are then ready for use. When the material has to stand extremely high
temperatures, the quantity of asbestos in the mixture should be increased to as much
as double that stated above, the proportion of slag, glass and fire clay being
proportionally reduced.
4002
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Manufacture of Refractory Crucibles, Pots, Bricks, and Lumps
for Furnaces.
I, JOHN IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the County
of Middlesex, Consulting Engineer, and Patent Agent, do hereby declare the nature
of this invention and in what manner the saine is to be performed to be particularly
described and ascertained in and by the following statement:-
This invention relates to the manufacture of refractory crucibles, pots, bricks or
lumps used in furnaces exposed to intense heat.
For this purpose, about 30 parts by weight of fragments of highly refractory fire
clay, about 20 parts of pulverised blast furnace slag, about 20 parts of broken bottle
or other glass also pulverised, and about 5 parts of crude sulphur are mixed together
and heated until the mixture is partly fused into a pasty condition. When it is in
this state, about 25 parts by weight of shredded asbestos are stirred into the mass, and
the mixture then in the form of thick paste or pulp is run into moulds of the form
desired.
These moulds before receiving the pasty material are lined with a layer of shredded
asbestos applied more particularly to those parts of the moulds which are to shape the
exposed faces of the moulded articles.
The material is then baked in the moulds until the moulded articles become firm
and solid.
After cooling, they are removed from the moulds presenting on their surfaces the
adhering layers of asbestos with which the moulds were lined, and they are then ready
for use.
When the material has to stand extremely high temperatures, the quantity of
asbestos in the mixture should be increased to as much as double that stated above,
the proportion of slag, glass and fire-clay being proportionally reduced.
The asbestos employed should be of the most refractory kind such as is found chiefly
in cold countries, particularly in Siberia.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what
1 claim is
The manufacture of refractory crucibles, pots, bricks and lumps for furnaces, of the
compounded materials herein mentioned and in the manner herein described.
Dated this 22nd day of May 1888.