CERTAIN IMPROVEMENTS IN MACHINERY FOR REDUCING AND PULVERIZING ORES, MINERALS, STONES, AND OTHER SUBSTANCES
Year: 1852

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
RICHARDS, of Saint Erth, and SAMUEL GROSE, of Gwinear, both in the County
of Cornwall, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Fifteenth day of July,
One thousand eight hundred and fifty-two, in the sixteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto us, the said
Thomas Richards and Samuel Grose, our exors, admors, and assigns, Her
especial licence, full power, sole privilege and authority, that we, the said
Thomas Richards and Samuel Grose, our exors, admors, and assigns, or such
others as we, the said Thomas Richards and Samuel Grose, our exors, admors,
or assigns, should at any time agree with, and no others, from time to time
and at all times during the term of years therein expressed, should and
lawfully might make, use, exercise, and vend, within England, Wales, and the
Town of Berwick-upon-Tweed, in the Islands of Jersey, Guernsey, Alderney,
Sark, and Man, and in all Her said Majesty's Colonies and Plantations
abroad, our Invention of "CERTAIN IMPROVEMENTS IN MACHINERY FOR REDUCING
AND PULVERIZING ORES, MINERALS, STONES, AND OTHER SUBSTANCES;" in which
said Letters Patent is contained a proviso that we, the said Thomas Richards
and Samuel Grose, or one of us, should cause a particular description of the
nature of our said Invention, and in what manner the same is to be performed,

page_text: by an instrument in writing under our hands and seals, or under the hand and
seal of one of us, to be inrolled in Her said Majesty's High Court of Chancery
within six calendar months next and immediately after the date of the said in
part recited Letters Patent, as in and by the same, reference being thereunto
had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, we, the said
Thomas Richards and Samuel Grose, do hereby declare that the nature of our
said Invention, and the manner in which the same is to be performed, are fully
described and ascertained in and by the present Specification thercof, reference
being had to the Drawings hereunto annexed, that is to say :-
The nature of our Invention consists in so arranging and placing two
grinding and pulverizing surfaces with respect to each other that the space
provided between them for the reception of the matters to be reduced and
pulverized shall gradually diminish or decrease till the surfaces nearly
approach each other, according to the fineness required in the pulverizing
substances. Whatever may be the variations in the size of the substances
when fed into the machine, they will be uniform, or nearly so, in size after
passing between the grinding surfaces.
The accompanying Drawings exemplify the manner in which our Invention
may be performed.
Figure 1 is a sectional elevation of a machine suitable for reducing and
pulverizing ores. A, A, are foundation pillars, which support the casing B, B,
and hopper C. D, D, is a fixed conical grinding surface, which may be of
wrought iron case hardened, or of steel, or of cast iron case hardened, or with
a chilled face and fluted either in straight lines or spirally. b, b, is an
aperture between the casing and the cone D for the admission of water
through the pipe C to keep the surface cool when ores are being pulverized in
a dry state. d is a pipe for the exit of the water. E is a hollow shaft con-
nected with any prime mover. It has keyed to it a grinding cone F formed
of wrought iron case hardened or of steel or of cast iron case hardened, or with
a chilled face and fluted in straight lines or spirally, to correspond with the
flutes in the fixed cone D. The lower end of the shaft is supported in the
socket G. H is an adjusting wedge for the purpose of raising or lowering
the shaft when required. I is a cup for the reception of water which flows
down through the shaft E into the hollow of the cone F, for the purpose of
keeping it cool; e is a pipe for the exit of the water; K, K, is a vessel for
the reception of the pulverized substances. The distance between the
revolving and fixed cones is regulated by raising or lowering the shaft E, and
with it the cone F by means of the adjusting wedge H. The action of the

page_text: machine is as follows:-Ore is placed in the hopper C, rotation is imparted to
the cone F, and the ore falls as it is gradually reduced down the inverted
canical-shaped space between the cones D and F, until it falls pulverized into
the vessel K, from whence it is from time to time removed. Water is
supplied to both the fixed and revolving surfaces to keep them cool, as before
described.
A is a
Figure 2 is a sectional elevation of another pulverizing machine.
fixed plate, and B a revolving reducing cylinder. The space into which the
ore falls from the hopper C is large at the mouth, and decreases gradually
down to the bottom of the fixed plate, when the ore will issue in a pulverized
Water may be caused to flow at the back of both the fixed and
revolving surfaces to keep them cool.
state.
Figure 3 is an elevation of a horizontal reducing machine. It consists of a
pair of fluted grinding surfaces A and B. The dotted lines indicate the shape
of the upper surface; the aperture is large at the centre where the substances
fall from the hopper C, and tapers off gradually to the periphery. The lower
grinding surface is mounted in a frame fixed upon a vertical shaft D. The
substances being fed through the hopper C, and motion being imparted to the
lower grinding surface, they will be forced by centrifugal action to the peri-
phery of the machine, and will leave it in a finely pulverized state.
Water or
air may be admitted to keep the surfaces cool through orifices in the upper
face A.
And having now described the nature of our said Invention, and in what
manner the same is to be performed, we declare that we claim as our Inven-
tion the arrangements of machinery for reducing and pulverizing ores and
other substances in so far as regards the providing of an opening or space
between two reducing or pulverizing surfaces which gradually tapers off or
diminishes till such surfaces approach to and nearly touch each other, and
whereby the substances become gradually reduced during the operation of the
machine, and finally leave it in a uniform or nearly uniform state of pulveriza-
tion, all as herein-before exemplified and described.
In witness whereof, we, the said Thomas Richards and Samuel Grose,
have hereunto set our hands and seals, this Thirteenth day of January,
in the year of our Lord One thousand eight hundred and fifty-three.
THOMAS (L.S.) RICHARDS.
SAMUEL (L.S.) GROSE.

page_text: AND BE IT REMEMBERED, that on the Thirteenth day of January, in
the year of our Lord 1853, the aforesaid Thomas Richards and Samuel Grose
came before our said Lady the Queen in Her Chancery, and acknowledged
the Specification aforesaid, and all and every thing therein contained and
specified, in form above written. And also the Specification aforesaid was
stamped according to the tenor of the Statute made for that purpose.
Enrolled the Fifteenth day of January, in the year of our Lord One
thousand eight hundred and fifty-three.