PROPER APPARATUS FOR WASHING IRON MINERAL
Year: 1858

page_text: LETTERS PATENT to Joseph Maitre, residing at Thiéffrain, (Aube,) in the
Empire of France; for the Invention of "PROPER APPARATUS FOR WASHING
IRON MINERAL."
Sealed the 22nd September 1858, and dated the 24th April 1858.
PROVISIONAL SPECIFICATION left by the said Joseph Maitre at the
Office of the Commissioners of Patents, with his Petition, on the
24th April 1858.
I, JOSEPH MAITRE, residing at Thiéffrain, (Aube,) in the Empire of France,
do hereby declare the nature of the said Invention for a "PROPER APPARATUS
FOR WASHING IRON MINERAL," to be as follows:-
DESCRIPTION OF THE DRAWINGS.
A, an iron plate dividing the water necessary for the washing. B, pipes for
conducting water to the pestles. C, movable iron grate, placed in a frame
dividing the mineral ore from the rock; the bottom of the grate is on an
inclined plane, which facilitates the sliding of the mineral: D, inclined plane
allowing the ore to precipitate itself over the pestles. E, the pestles of the
crushing mill. F; cheeks which hold the iron bars forming the partition of the
pestles. G; beam. H, trough of the crushing mill.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Maitre in the Great Seal Patent Office on the
6th October 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPII
MAITRE, residing at Chieffrain, (Aube,) in the Empire of France, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fourth day of April, in the year of our
Lord Oue thousand eight hundred and fifty-eight, in the twenty-first year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Joseph Maitre, Her special licence that I, the said
Joseph Maitre, my executors, administrators, and assigns, or such others
as I, the said Joseph Maitre, 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
"PROPER APPARATUS FOR WASHING IRON MINERAL," upon the condition (amongst
others) that I, the said Joseph Maitre, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and seals, 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 Joseph Maitre, 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, and accompanying Drawings, that is to say:-
The present mode of washing the rough ore, either fine or rock, has many
great disadvantages, one of which is the submitting of both at the same time
to the action of the stampers & rollers. Struck with the loss occasioned by
this system, I conceived the idea of subjecting to the action of the stampers
or cylinders only, the ore which requires crushing, and not the finer ore, which
is. too tender.
The
The following apparatus is my Invention for the division of the ore.
workman throws the ore on a cast-iron plate placed before a grating, and
another workman, aiding the water, causes the ore to move on, the fine ore
passing through the grating, and the rougher ore passing under the stampers

page_text: or rollers, whence, after being crushed, it goes out at the same time with the
fine ore, which having passed through the grating is drawn, on each side of the
stampers a parting in the shape of a V (dotted in the plan) being placed to
turn aside the fine ore from the stampers, it then falls into the trough with
the crushed rock ore. By a proceeding thus simple and economical, and
which can be applied to crushing machines without altering their construction
I obtain the favorable result of an increase of 20 to 25 per cent. of ordinary
ore, and a great part of the finest ore which has hitherto been converted into
mud by the crushing, and carried into the refining basins, or into rivers or
sluices where it is entirely lossed. Another advantage is that less motive
power is required, there being less ore to crush, and the rocky ore being
easier to crush than if mixed with earthy ore. This same system can
also be applied to other machines, also to washers, where the ore is pre-
pared by hand; in this last case the rocky ore falls the other side of the
grating, and in another trough, as this rocky ore must be broken with hammers
in the same manner as stones for the road.
It is of course understood that the gratings for the separation of the ores
may vary in form & size; what I claim as my Invention is the system of sepa-
ration as above described.
After several trials the apparatus in its present form (as represented in the
Drawings) appears the most preferable.
A, an iron plate, dividing the water necessary for the washing. B, pipes for
conducting water to the pestles. C, moveable iron grate, placed in a frame,
dividing the fine from the rocky ore; the grate is arranged on the slope to
facilitate the sliding of the ore. D, inclined plane, allowing the rocky ore to
precipitate itself under the pestles. E, the pestles of the crushing mill.
F, cheeks holding the iron bars, forming the partition of the pestles. G, shaft.
H, trough of the crushing mill.
In witness whereof, I, the said Joseph Maitre, have hereunto set my
hand and seal, this Sixth day of October, in the year of our Lord
One thousand eight hundred and fifty-eight.
JOSEPH MAITRE. (L.S.)