THE MANUFACTURE OF AN IMPROVED MATERIAL TO BE EMPLOYED AS A FILTERING MEDIUM AND FOR OTHER PURPOSES
Year: 1880

page_text: LETTERS PATENT to Prosper Auguste Maignen, of Great Tower Street, in the
City of London, for an Invention of "THE MANUFACTURE OF AN IMPROVED
MATERIAL TO BE EMPLOYED AS A FILTERING MEDIUM AND FOR OTHER
PURPOSES."
PROVISIONAL SPECIFICATION left by the said Prosper Auguste Maignen
at the Office of the Commissioners of Patents on the 2nd October 1880.
PROSPER AUGUSTE MAIGNEN, of Great Tower Street, in the City of London.
"THE MANUFACTURE OF AN IMPROVED MATERIAL TO BE EMPLOYED AS A
FILTERING MEDIUM AND FOR OTHER PURPOSES."
This Invention relates to the manufacture of a material, consisting of a combi-
nation of charcoal and pure lime, which can be advantageously employed for the
purposes of filtration, especially when hard water is to be filtered, as it not only
strains and purifies the same, but it at the same time takes up and retains a
quantity of any carbonate and sulphate of lime contained in the hard water,
thereby rendering the latter comparatively soft; the said material is also applicable
as a medium for defecating and purifying sugar, and it will also be found convenient
as a medicine, in cases where it is desirable for the sufferer to take charcoal and
pure lime, as in cases of dyspepsia, calculous affections, and rickets.
As hereinbefore stated, the improved material consists of a combination of
charcoal, which may be either animal, vegetable, or mineral, and pure lime, the
latter being contained within the pores of the former, and the said material is
manufactured in the following manner:-
The charcoal is placed in a vessel, into which is poured a sufficient quantity of
lime water to cover the same; the vessel is then heated by being placed over a fire,
or by any other suitable means, and it is kept at a boiling heat for some time; as
the water evaporates, its place is supplied by a further quantity of the lime water.
This operation is continued until it is considered that the quantity of lime deposited
bears. a proper relative. proportion to the quantity of charcoal, such proportion
varying, as will be well understood, according to the purpose for which the material
is intended; any water remaining is then poured off and the material dried, when it
is ready for use. When the mixture boils, as herein before described, carbonic acid
gas and sulphurous gas are driven off from the carbonates and sulphates in the lime
water, thereby leaving pure lime, which is precipitated and becomes deposited in
the pores of the charcoal.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Prosper Auguste Maignen in the Great Seal Patent Office on
the 1st April 1881.
PROSPER AUGUSTE MAIGNEN, of Great Tower Street, in the City of London.
BE EMPLOYED AS
"THE MANUFACTURE OF AN IMPROVED MATERIAL TO
FILTERING MEDIUM AND FOR OTHER PURPOSES."
Y
My said Invention relates to the manufacture of a material, consisting of a
combination of charcoal and pure lime, which can be advantageously employed for
the purposes of filtration, especially when hard water is to be filtered, as it not only
strains and purifies the water, but it at the same time takes up and retains a
quantity of any carbonate and sulphate of lime contained therein, thus rendering
the water comparatively soft; the said material is also applicable as a medium for
defecating and purifying sugar, and it will be found convenient as a medicine in
cases where it is desirable for the sufferer to take charcoal and pure lime, as in
cases of dyspepsia, calculous affections, and rickets.
As hereinbefore stated, the improved material consists of a combination of
charcoal, which may be either animal, vegetable, or mineral, and pure lime, the
latter being contained within the pores of the former. The said material is
manufactured in the following manner :-
The charcoal is placed in a vessel, into which is poured a sufficient quantity of
lime water to cover the same; the vessel is then heated by being placed over a fire,
or by any other suitable means, and it is kept at a boiling heat for some time; as
the water evaporates, its place is supplied by a further quantity of the lime
water. This operation is continued until it is considered that the quantity of lime
deposited bears a proper relative proportion to the quantity of charcoal, such
proportion varying, as will be well understood, according to the purpose for which
the material is intended; any water remaining is then poured off and the material
dried, when it is ready for use.
When the mixture boils, as hereinbefore described, carbonic acid gas and
sulphurous gas are driven off from the carbonates and sulphates in the lime water
and charcoal, thereby leaving pure lime, which is precipitated, and becomes deposited
in the pores of the charcoal.
Having thus described and ascertained the nature of my said Invention, and the
manner in which it is to be performed, I would observe in conclusion that what I
consider novel and original, and therefore claim as constituting the Invention
secured to me by the said herein before in part recited Letters Patent is,-
The manufacture of the improved material to be employed as a filtering medium
and for other purposes, substantially as hereinbefore set forth and described.
In witness whereof, I, the said Prosper Auguste Maignen, have hereunto
set my hand and seal, this First day of April, in the year of our Lord
One thousand eight hundred and eighty-one.
P. A. MAIGNEN. (L.S.)