IMPROVEMENTS IN MILL STONES FOR GRINDING CORN, SEEDS OR MINERALS
Year: 1853

page_text: LETTERS PATENT to John Smith, Machine Maker, of the Albion
Works, Bradford, in the West Riding of Yorkshire, for the
Invention of "IMPROVEMENTS IN MILL STONES FOR GRINDING CORN,
SEEDS OR MINERALS."
Sealed the 5th May 1854, and dated the 5th November 1853.
PROVISIONAL SPECIFICATION left by the said John Smith' at the
Office of the Commissioners of Patents, with his Petition, on the
5th November 1853.
I, JOHN SMITH, Machine Maker, of Bradford, West Riding of York-
shire, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN MILL STONES FOR GRINDING CORN, SEEDS, OR MINERALS," to be as
follows:-
My improvements consists of a new mode of ventilating the stones
during the process of grinding by means of rectilinear or curved aper-
tures or openings through the thickness of the running stone at a tan-
gent or straight line to the centre or eye, or by furrows or channels cut

page_text: deeper than half an inch on the grinding surface thereof, whereby the
corn, seeds, or minerals are kept cool, and thereby the grinding facili-
tated. I also apply a raised rim to the back of the running stone, the
purpose of which is to prevent the air from passing over into the case
which encircles the stones."
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Smith in the Great Seal Patent Office on
the 5th May 1854.
TO ALL TO. WHOM THESE PRESENTS SHALL COME, I,
JOHN SMITH, Machine Maker, of the Albion Works, Bradford, in the
West Riding of Yorkshire, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of November, in the year
of our Lord One thousand eight hundred and fifty-three, in the seven-
teenth year of Her reign, did, for: Herself, Her,, heirs and successors,
give and grant unto me, the said John Smith, Her special licence that
I, the said John Smith, my executors, administrators; and assigns, or
such others as. I, the said John Smith, 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 night make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel.
Islands,, and Isle of Man, an Invention for "IMPROVEMENTS IN MILL
STONES FOR GRINDING CORN, SEEDS, OR MINERALS," upon the condition
(amongst others) that I, the said John Smith, by an instrument in
writing under my hand and seal, should particularly describe and ascer-
tain, 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 John Smith, do hereby declare
the nature of the said Invention, and in what manner the same is to

page_text: be performed, to be particularly described and ascertained in and by the
following statement thereof (that is to say):
a
My improvements consist in ventilating the stones during the process
of grinding by means of rectilinear or curved apertures or openings
through the thickness of the running stone at a tangent or it may be
straight line to the centre or eye, or by furrows, or channels cut deeper
than half an inch on the grinding surface.thereof, forming air channels
whereby the corn, seeds, or minerals are kept cool and the grinding
facilitated. I also apply a raised rim to the back of the running stone,
the purpose of which is to prevent the air from passing over into the
case which encircles the stones.
ة المستند
But that the Invention may be fully understood will proceed-to
describe the Drawing annexed..
!..
DESCRIPTION. OF THE DRAWING:
Figure 1, is a plan view of a running stone shewing the under or
grinding surface with the ordinary furrows formed thereon, and the
apertures or openings for the air. Figure 2, is also a plan view of the
upper or top side, shewing the apertures or openings for the air when
formed through the stone and the raised rim. Figure 3, is a cross sec-
tion through the line a, b, on Figure 2. c, c, are the apertures or
openings through the stone. d is the raised rim. f is the iron eye or
boss, with arins, g, for holding together the separate parts of the stone.
h, h, hoops holding or binding the whole together, as in the ordinary
It will be readily perceived that air will have free access to the
grinding surface of the stones through the apertures or openings c, c, to
keep the corn, seeds, or minerals cool during the operation of grinding.
The raised rim d prevents the air from passing too freely from the
apertures or openings c, c, to the outer case. The furrows or channels
i, i, are such as are ordinarily used.
way.
Sometimes, in place of forming passages c, c, for the air through the
thickness of the stone, simply form them by deep recesses in like
position on the grinding surface of the running stone, the depth of such
recesses being at least one half inch.
Having thus described the nature of the said Invention, I would have

page_text: it understood that what I claim is, the mode of forming mill stones with
openings or apertures through the thickness of the running stone, and
also with channels of more than one half inch deep for the passage of
air to cool the same, as described. -
In 'witness' whereof, I, the said John Smith, have hereunto, set
my hand and seal, this Third day of May, in the year of our
Lord One thousand eight hundred and fifty-four.
Witness,
WILLIAM TASKER.
JOHN SMITH. (L.S.)