A NEW SORT OF PORCELAIN, AND A NEW AND IMPROVED PROCESS FOR MANUFACTURING THE SAME
Year: 1869

page_text: LETTERS PATENT to Henri Adrien Bonneville, of the British and
Foreign Patent Offices, 18, Chaussée d'Antin, Paris, in the Empire
of France, and 10, Sackville Street, Piccadilly, in the County of
Middlesex, Patent Agent, for the Invention of "A NEW SORT OF
PORCELAIN, AND A NEW AND IMPROVED PROCESS FOR MANUFACTURING THE
SAME." A communication from Antoinette Vidal, residing at No. 5,
Rue St. Sauveur, in Paris, aforesaid.
Sealed the 20th April 1869, and dated the 9th March 1869.
COMPLETE SPECIFICATION filed by the said Henri Adrien Bonneville
at the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 9th March 1869, pursuant to the 9th Section of
the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRI
ADRIEN BONNEVILLE, of the British and Foreign Patent Offices, 18,
Chaussée d'Autin, Paris, in the Empire of France, and 10, Sackville

page_text: Street, Piccadilly, in the County of Middlesex, Patent Agent, send
greeting.
"
WHEREAS I am in possession of an Invention for "A NEW SORT OF
PORCELAIN, AND A NEW AND IMPROVED PROCESS FOR MANUFACTURING THE SAME,'
a communication from Antoinette Vidal, a person resident at No. 5,
Rue St. Sauveur, in Paris, aforesaid, and have petitioned Her Majesty
to grant unto me, my executors, administrators, and assigns, Her Royal
Letters Patent for the same, and made solemn declaration that it is a
communication.
NOW KNOW YE, that I, the said Henri Adrien Bonneville, do hereby
declare that the following Complete Specification under my hand and
seal, fully describes and ascertains the nature of the Invention, and the
manner in which the same is to be performed.
The Invention communicated to me relates to a new sort of porcelain
fit for filtering liquids generally, and which may consequently be used
for the manufacture of all sorts of vases and receptacles for filtering
purposes, and to the process by which the said porcelain may be manu-
factured. This process consists in mixing in equal quantities kaolin
and gypsum, and in adding thereto pulverised charcoal or an analogous
pulverised substance done away with in the baking, in variable quantity
according to the degree of porousness desired. The mixture of these
substances is effected by the usual means, and by adding water in
sufficient quantity to obtain a paste of such consistency as to be able to
mould the same into any convenient form according to the use and
application to which it is intended.
The objects thus made and moulded are next taken from the moulds
and dried, they are then baked in an oven after the manner of ordinary
porcelain.
Having thus described the nature of the said Invention, and the
manner of carrying the same into effect, what I claim and wish to
secure by Letters Patent is,-
1. The new sort of porous porcelain fit for filtering purposes, sub-
stantially as herein-before fully set forth and described.
And, 2. The process by which the said more or less porous porcelain
is manufactured, consisting in the combination in variable quantities of
pulverised charcoal or an analogous substance with kaolin and gypsum.

page_text: in equal quantities, substantially as herein-before fully set forth and
described.
In witness whereof, I, the said Henri Adrien Bonneville, have
hereunto set my hand and seal, this Eighth day of March, in
the year of our Lord Eighteen hundred and sixty-nine.
H. BONNEVILLE. (L.S.)