IMPROVEMENTS IN GRINDING WHEAT AND OTHER GRAIN
Year: 1852

page_text: LETTERS PATENT to Isaac Westhorp, of 9, George Yard, in the
City of London, for the Invention of "IMPROVEMENTS IN GRINDING
WHEAT AND OTHER GRAIN." A communication.
Scaled the 12th January 1853, and dated the 1st October 1852.
PROVISIONAL SPECIFICATION left by the said Isaac Westhorp
at the Office of the Commissioners of Patents, with his Petition,
on the 1st October 1852.
I, ISAAC WESTHORP, of 9, George Yard, in the City of London, do
hereby declare the nature of the said Invention for "IMPTS. IN GRINDING
WHEAT AND OTHER GRAIN" to be as follows:-
This Invention consists, first, of a mode of hanging millstones by
connecting the driving spindle to a block, which is moveable on a bar
across to the centre of the stone, such bar being fixed in the stone by
boxes let into it, and by adjusting and holding screws and nuts. And,
secondly, the Invention consists of withdrawing air from a trunk or
chamber in communication with the case of the millstones; the
external air is thus induced to ascend the pipe, down which the ground
product descends from the stones, which product is thereby ventilated,

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Isaac Westhorp in the Great Seal Patent
Office on the 1st April 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
ISAAC WESTHORP, of 9, George Yard, in the City. of London, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of October, in the year
of our Lord One thousand eight hundred and fifty-two, in the six-
teenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Isaac Westhorp. Her special
licence that I, the said Isaac Westhorp, my executors, adminis-
trators, and assigns, or such others as I, the said Isaac Westhorp,
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
"IMPROVEMENTS IN GRINDING WHEAT AND OTHER GRAIN," upon the
condition (amongst others) that I, the said Isaac Westhorp, 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 Isaac Westhorp, do hereby
declare the nature of the 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):
This Invention consists of a mode of hanging millstones, by connecting

page_text: the driving spindle to a block, which is moveable on a bar across the
centre of the stone, such bar being fixed in the stone by boxes let into
it, and by adjusting and holding screws and nuts. And, secondly, the
Invention, consists of withdrawing air from a trunk or chamber in com-
munication with the case of the millstones. The external air is thus
induced to ascend the pipe down which the ground product descends
from the stones, which product is thereby ventilated, and the dust
carried up by the air is deposited in the trunk or chamber from which
the air is withdrawn.
And in order that the Invention may be most fully understood and
carried into effect, I will proceed to describe the Drawings hereunto
annexed.
DESCRIPTION OF THE DRAWINGS.
:
Figure 1, is a side view, partly in section, shewing the general
arrangement of the machinery. Figure 2, is a plan of part of the
same. Figures 3, and 4, show respectively a vertical section, and a
plan on a larger scale, of the apparatus relating to the first part of
my Invention.
d, is a block securely fastened on the shaft F. In this block is a
groove which receives the bar T; this bar is secured to the stone
at its two ends by means of the screws and nuts Q, Q, but is at
the same time capable of being adjusted to the correct working center
of the stone by means of the set screws and adjusting nuts R, R, in
the boxes P, P, which are fastened in the stone. V, is a platform on
the top of the stone, to distribute the grain as it descends. a, is a
tube or shoot which brings the grain from a reservoir above into
the cylinder b, from which it falls through the funnel c, which is
fixed to the upper or remaining stone A, after which the grain passes
between the stone A, and the fixed stone B, and is ground in the
usual manner. The products fall through the trunk G, into the
receiver H, underneath which a sack S, is placed, to be filled in the
usual manner. O, is an opening through which air enters; it passes
up the pipe G, meating and thus cooling the products as they fall;
it enters the case D, which surrounds the stones, circulates round

page_text: them, and finally escapes by the pipe I, into the trunk K, where it
deposits the dust which it has brought up' with it before it is reinoved
by a fan or otlier suitable apparatus. L, are openings through which
the dust is removed. It will be necessary that the funnel e, be kept
tight at its circumference by means of leather or fabric, to prevent the
air from escaping there. F, is the shaft which drives the upper stone A;
it receives its motion by means of a band from the main driving shaft,
which passes round the pulley M. The mode in which the stone is
driven by the shaft F, is best seen at Figures 3, and 4.
Having thus described the nature of my Invention, and the manner
of performing the same, I'would have it understood that I do not confine
myself to the exact details herein described, so long as the peculiar
character of my Invention be preserved. But what I claim is, first, the
combination or arrangement of apparatus for driving a millstone, herein
described; and, secondly, the combination or arrangement of apparatus.
for introducing air to the ground products and to the millstones, as
herein described."
In witness whereof, I, the said Isaac Westhorp, have hereunto set
my hand and seal, this Thirty-first day of March, in the year of
our Lord One thousand eight hundred and fifty-three.
Witness,
JAMES JOSIAH ALLOWAY.
ISAAC WESTHORP. (L.S.)