IMPROVED TREATMENT OF OR METHOD FOR REDUCING MINERAL OR OTHER STONES TO FRAGMENTS
Year: 1880

page_text: LETTERS PATENT to Sir Francis Charles Knowles, of Lovell Hill, in the County
of Berks, Baronet, for an Invention of "IMPROVED TREATMENT OF OR METHOD
FOR REDUCING MINERAL OR OTHER STONES TO FRAGMENTS."
"
PROVISIONAL SPECIFICATION left by the said Sir Francis Charles Knowles
at the Office of the Commissioners of Patents on the 24th November 1880.
_Sir FRANCIS CHARLES KNOWLES, of Lovell Hill, in the County of Berks, Baronet.
IMPROVED TREATMENT OF OR METHOD FOR REDUCING MINERAL OR OTHER
STONES TO FRAGMENTS."
This Invention relates to a special method of operating upon mineral or other
stones to reduce them to minute fragments in the course if necessary for further
comminution, the mineral being first reduced to a size corresponding to that used
in ordinary lime burning.
My Invention consists in placing the reduced substances within a furnace or kiln,
and heated to a cherry red temperature; it is then drawn in its heated state, and
either plunged into cold water or quenched with water, as coke is quenched after
being drawn from the oven.
The resulting fragments when cold are mechanically crushed by rollers or
otherwise to the necessary size, the particles being screened if desired for the
purpose they are intended for.
If the mineral gangue be carbonate of lime the operation is much facilitated by
the slaking which accompanys it.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Sir Francis Charles Knowles in the Great Seal Patent Office on
the 24th May 1881.
Sir FRANCIS CHARLES KNOWLES, of Lovell Hill, in the County of Berks, Baronet.
"IMPROVED TREATMENT OF OR METHOD FOR REDUCING MINERAL OR OTHER
STONES TO FRAGMENTS."
This Invention relates to a special method of operating upon mineral or other
stones to crack them or reduce them to minute fragments in the course if necessary
for further comminution, the mineral being first reduced to a size more or less
corresponding to that used in ordinary lime burning.
My Invention consists in placing the reduced substance within a furnace or kiln,
and heated to a cherry red temperature; it is then, drawn in its heated state, and
either plunged into cold water or quenched with water, as coke is quenched after
being drawn from the oven.
The resulting fragments when cold are mechanically crushed by rollers or
otherwise to the necessary size, the particles being screened if desired for the
purpose they are intended for.
If the mineral gangue be carbonate of lime the operation is much facilitated by
the chemical slaking which accompanys it.
Having now described the nature of my said Invention, and in what manner the
same is to be performed, I declare that I claim,―
The method of cracking and breaking up stoney minerals, ore, and stones to
fragments, consisting of first heating said material to a cherry red heat, and then
applying water as described; the operation enabling me to dispense with the
usual laborious manual and mechanical manipulations now adopted for that
purpose.
In witness whereof, I, the said Sir Francis Charles Knowles, have hereunto
set my hand and seal. this Twenty first day of May. in the year of our