Improvements relating to the Manufacture of Pottery.
Year: 1893

page_text: Date of Application, 16th Dec., 1893
Complete Specification Left, 18th Aug., 1894-Accepted, 27th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements relating to the Manufacture of Pottery.
1, JEAN EMMANUEL GEORGES MÉRAN, of 155 Rue du Faubourg Poissonnière,
Paris, in the Republic of France, Engineer, do hereby declare the nature of this
invention to be as follows:-
:-.
My invention relates to the manufacture of pottery, which is characterized by
the employment of magnesia.
Earthenware and porcelain have heretofore generally been manufactured of any
earth capable of being baked or fired and of being formed into pastes which are
more or less solid and more or less beautiful in appearance.
Pottery has not hitherto been made of special minerals which by their nature
impart to the pottery particular qualities such as give important industrial
results.
The improved material having a base of magnesia forms a product which in the
biscuit or porous state has qualities not possessed by any known pottery.
The structure of this material, which is not attacked by acids, is such that the
filtration of any liquids may be effected in a complete manner.
This special quality renders the material suitable for numerous electrical purposes,
such as is not the case with the earthenware heretofore used. It is employed in
electrolysis without ever changing in contact with acids. In the form of porous
vessels it gives double the yield of ordinary earthenware, and does not wear in
contact with acids. It can moreover withstand a much higher temperature than
that to which ordinary earthenware or pottery may be exposed without injury, so
that it is suitable for refractory vessels, retorts, kitchen utensils exposed to fire,
pipes and the like.
The articles consisting of this material may be manufactured by the processes
which have heretofore been used in earthenware manufactories or potteries.
For this purpose it is necessary to crush and pulverize the various rocks which
contain magnesia, such as hydrated magnesia, carbonated magnesia, magnesite, talc,
steatite, serpentine or other silicates of magnesia.
When a powder has been produced it is sufficient to mix the same with water for
making a paste and to knead and work it up like ordinary earthenware paste.
Articles of this material are made by casting or moulding, drying and baking or
firing in a furnace at a temperature of about twelve hundred degrees.
When using a higher temperature for instance 1800 degrees centigrade particularly
white and translucid products are obtained which approximate porcelain.
This material, the special industrial applications of which are very important,
may be employed for manufacturing articles of the most varying kinds.
For facilitating the working of the magnesia paste it is necessary to add any
suitable binding agent such as clay in as small proportions as possible, for example
scarcely ten per cent., which does not remove any of the qualities appertaining.
particularly to magnesia.
Dated this 16th day of December 1893.

page_text: COMPLETE SPECIFICATION.
Improvements relating to the Manufacture of Pottery.
I, JEAN EMMANUEL GEORGES MERAN, of 155 Rue du Faubourg Poissonnière,
Paris, in the Republic of France, Engineer, 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 :—
My invention relates to the manufacture of pottery, which is characterized by
the employment of magnesia.
Earthenware and porcelain have heretofore generally been manufactured of any
earth capable of being baked or fired and of being formed into pastes which are
more or less solid and more or less beautiful in appearance.
Pottery has not hitherto been made of special minerals which by their nature
impart to the pottery particular qualities such as give important industrial
results.
The improved material having a base of magnesia forms a product which in the
biscuit or porous state has qualities not possessed by any known pottery.
The structure of this material, which is not attacked by acids, is such that the
filtration of any liquids may be effected through it in a complete manner.
This special quality renders the material suitable for numerous electrical purposes,
such as is not the case with the earthenware heretofore used. It is employed in
electrolysis without ever changing in contact with acids. In the form of porous
vessels it gives double the yield of ordinary earthenware, and does not wear in
contact with acids. It can moreover withstand a much higher temperature than
that to which ordinary earthenware or pottery may be exposed without injury, so
that it is suitable for refractory vessels, retorts, kitchen utensils exposed to fire,
pipes, and the like.
The articles consisting of this material may be manufactured by the processes
which have heretofore been used in earthenware manufactories or potteries.
For this purpose it is necessary to crush and pulverize the various rocks which
contain magnesia, such as hydrated magnesia, carbonated magnesia, magnesite, talc,
steatite, serpentine or other silicates of magnesia.
When a powder has been produced it is sufficient to mix the same with water for
making a paste and to knead and work it up like ordinary earthenware paste.
Articles of this material are made by casting or moulding, drying and baking or
firing in a furnace at a temperature of about twelve hundred degrees centigrade.
When using a higher temperature say 1800 degrees centigrade particularly white
and translucid products are obtained which approximate porcelain.
This material, the special industrial applications of which are very important, may
be employed for manufacturing articles of the most varying kinds.
For facilitating the working of the magnesia paste it is necessary to add any
suitable binding agent such as clay in as small proportions as possible, for example
scarcely ten per cent., which does not remove any of the qualities appertaining
particularly to magnesia.
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 employment of the herein described material having a base of magnesia for
the manufacture of articles of pottery for various purposes substantially as above
described.
Dated this 18th day of August 1894,
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.