AN IMPROVED ARTIFICIAL STONE FOR " FOR GRINDING, SHARPENING, AND POLISHING
Year: 1856

page_text: LETTERS PATENT to Alphonse Meillet, of 39, Rue de l'Echiquier, Paris,
in the Empire of France, and of 4, South Street, Finsbury, London,
Gentleman, for the Invention of "AN IMPROVED ARTIFICIAL STONE FOR
"
PROVISIONAL SPECIFICATION left by the said Alphonse Meillet at the
Office of the Commissioners of Patents, with his Petition, on the
14th May 1856.
I, ALPHONSE MEILLET, of 39, Rue de l'Echiquier, Paris, in the Empire of
France, and of 4, South Street, Finsbury, London, Gentleman, do hereby
declare the nature of my said Invention of "AN IMPROVED ARTIFICIAL STONE
FOR GRINDING, SHARPENING, AND POLISHING, to be as follows, that is to say :-
My Invention consists in manufacturing artificial millstones, cylinders, and
other similar stones for sharpening, grinding, and polishing, by means of emery
combined with lead or alkaline substances, in the following manner :-
I first pound finely in water, 40 parts fusible yellow argile, 60 parts fusible
litharge; and when dry mix 100 parts of this composition with 100 parts of
emery; I well pound the whole in water, and when half dry I mould it into
the desired shapes, and afterwards introduce it into the ordinary pottery furnace
to be baked.

page_text: In lieu of the above agents, I can employ,--40 parts fusible yellow argile,
90 parts sulphate of lead; in which case I mix 130 parts with 100 parts of
emery, and operate as before described.
The composition may also be composed of,-20 parts silica, 60 parts oxide
of lead, 15 parts of borax; or 40 parts argile, 40 parts metaphosphate of soda,
30 parts of lead; or 40 parts argill, 40 parts potash or soda, 16 parts oxide of
lead.
The above composition serves to melt the emery, and may be selected
according to the nature of the articles to be manufactured.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alphonse Meillet in the Great Seal Patent Office on the
3rd November 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALPHONSE
MEILLET, of 39, Rue de l'Echiquier, Paris, in the Empire of France, and of
4, South Street, Finsbury, London, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourteenth day of May, in the year of our Lord One
thousand eight hundred and fifty-six, in the nineteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Alphonse Meillet, Her special license that I, the said Alphonse Meillet, my
executors, administrators, and assigns, or such others as I, the said Alphonse
Meillet, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for AN IMPROVED ARTIFICIAL STONE
FOR GRINDING, SHARPENING, AND POLISHING," upon the condition (amongst others)
that I, the said Alphonse Meillet, by an instrument in writing under my hand
and seal, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar months
next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Alphonse Meillet, do hereby declare the
nature of my said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement
thereof, that is to say:-

page_text: My Invention consists in the employment of emery combined in the manner
herein-after described with a compound of silicious earths, and plumbiferous of
alkaline substances, for the manufacture of artificial millstones and other stones
for grinding and polishing scythes and other implements:
I operate as follows: First, I compose the fusing material in the following
manner-1 take fusible yellow argile, forty parts; litharge, sixty parts; and
bruise them finely in warm water. I then mix one hundred parts of the com-
position thus obtained with one hundred parts of No. 1 emery. The compound
is then ground with the addition of water, and when the mass is half dry, I
mould it into the forms desired to be produced. The articles are then intro-
duced into an ordinary potter's oven, in which they are baked to the required
degree.
The fusing material may also be formed in various other ways, viz, fusible
yellow argile, forty parts; sulphate of lead, ninety parts; in which case I mix
one hundred and thirty parts of the fusing material with one hundred parts of
No. 1 emery, and operate as before described; or I can mix,-
Silica
-
Oxide of lead -
Borax
In lieu thereof,-
Argile
Lead
Metaphosphate of soda
It may also be composed of,-
Argile
Potass or soda
Oxide of lead
-
-
twenty parts,
sixty parts,
fifteen parts;
forty
"
forty
"
thirty
"
forty
"
forty
"
sixteen
"
The fusing compounds are employed according to the nature of the article
to be manufactured.
The two first described compositions are the most economical, and are those
which I prefer, although I do not confine myself thereto, the principle of my
Invention being the combination with emery of any fusible metallic substance
sufficiently hard for imparting to the emery the property of resisting friction,
and of serving more efficiently for the manufacture of artificial millstones. I
can employ emery of all numbers, from the coarsest to the finest, and by
varying the degree of baking I obtain the amount of hardness required, as
also by varying the proportion of fusing materials, which may be mixed with
twenty to one hundred and fifty per cent. of combining matters, according to

page_text: requirements. I employ all compounds of lead, or substances having lead
for base:
Having now described the nature of my said: Invention, and in what manner
the same is to be performed, I would have it understood that I do not confine
myself to the precise details herein laid down; but what I claim is, the method
of forming artificial stone for grinding, sharpening, and polishing purposes, as
herein before described.
In witness whereof, I, the said Alphonse Meillet, have hereunto set my
hand and seal, this First day of November, in the year of our Lord
One thousand eight hundred and fifty-six.
ALPHONSE MEILLET. (L.S.)