IMPROVEMENTS IN APPARATUS FOR GRINDING GRAIN AND OTHER SUBSTANCES
Year: 1859

page_text: LETTERS PATENT to George Tomlinson Bousfield, of Loughborough Park,
Brixton, in the County of Surrey, for the Invention of "IMPROVEMENTS IN
APPARATUS FOR GRINDING GRAIN AND OTHER SUBSTANCES."-A communication
from abroad by Pierre Etienne Brisson, of Orleans, France.
Sealed the 27th October 1859, and dated the 6th May 1859.
PROVISIONAL SPECIFICATION left by the said George Tomlinson
Bousfield at the Office of the Commissioners of Patents, with his
Petition, on the 6th May 1859..
I, GEORGE TOMLINSON BOUSFIELD, of Loughborough Park, Brixton, in the
County of Surrey, do hereby declare the nature of the Invention for "IM-
PROVEMENTS IN APPARATUS FOR GRINDING GRAIN AND OTHER SUBSTANCES," to be as
follows:-
This Invention is applicable where two horizontal grinding stones, placed
one above the other, are employed, and consists in suspending each stone on
apparatus similar to gimbals in such manner that it is free to incline in any
direction. The lower stone is by preference supported on the end of an axis
(which is caused to rotate in any suitable manner) by two projecting pins on
the axis entering, slots in a ring, on the exterior of which there are two other
projecting pins which enter slots in a ring attached to the centre of the stone,
by this means when the axis is caused to rotate the stone, will be carried round.
with it, but the stone will also be able, to incline in any direction, although

page_text: the centrifugal force of the rotating stone will tend to keep it in a horizontal
position. The upper stone has connected to it two bearings in which the two
ends of a rod turn, this rod is connected to another rod at right angles with
it, the ends of which project beyond the periphery of the stone and turn in
bearings in the framing of the machine. By this means the upper stone is
prevented from rotating, but is free to incline in any direction. The corn or
other substance to be ground is fed in at the eye of the upper stone, and there
are radial arms attached to the centre of the upper surface of the lower stone,
which as the lower stone rotates throws the corn or other substance to be
ground in between the two stones.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Tomlinson Bousfield in the Great Seal Patent Office
on the 4th November 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
TOMLINSON BOUSFIELD, of Loughborough Park, Brixton, in the County of
Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of May, in the year of our Lord One
thousand eight hundred and fifty-nine, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said George Tomlinson Bousfield, Her special licence that I, the said
George Tomlinson Bousfield, my executors, administrators, and assigns,
or such others as I, the said George Tomlinson Bousfield, 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 APPARATUS FOR GRINDING GRAIN AND OTHER
SUBSTANCES," a communication from abroad by Pierre Etienne Brisson, of
Orleans, France, upon the condition (amongst others) that I, the said
George Tomlinson Bousfield, my executors or administrators, by an instru-
ment 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 imme-
diately after the date of the said Letters Patent.

page_text: Figure 1 is a side view, Figure 2 a vertical section, and Figure 3 a plan in
section taken through the dotted line Y, Z, Figure 2, of an apparatus for
grinding grain and other substances, constructed according to this Invention.
a is the funnel which receives the grain or other substance to be ground; in
the bottom of this funnel there is a smaller funnel b, which can be removed
when it is desired to enlarge the exit from the funnel in order to feed a larger
quantity of material to the stones. The funnel a is supported by the bar c,
one end of which rests on the framing and through the other end a screw c¹
screws. The axis of this screw turns in bearings in the frame, and there are
upon it two hand wheels c", by turning either of which the end of the bar can
be raised or lowered, by which the funnel a can be raised or lowered from the

page_text: I
cup d, and the supply of metal to the stones be thus increased or diminished,
or be entirely stopped. The cup d is supported from the centre of the lower
grinding stone.i by four radial projections, which, when the stone is rotated,
throw the substances to be ground by centrifugal force in between the stones.
The upper grinding stone h has fixed to its upper surface two bearings g, in
which the ends of a bar i turn. This bar has at right angles to it two pro-
jections, the ends of which turn in bearings in the uprights f, which are
supported by the wooden beams f¹, by this means the stone h is prevented
from rotating, but is free to incline in any direction. The lower stone i is
supported on the end of the vertical axis m by two projecting pins on a
piece l, fixed on the end of the axis entering slots in the ring k, on the
exterior of which there are two projecting pins k¹, which enter slots in a ring j,
which is fixed in the centre of the stone i. The axis m is supported by the
cross bar o, which rests at its two ends on the wooden beams f¹; on the axis m
there is a pulley n, by which a rotatory motion can be given to the axis.
When the axis is rotated, the stone i will be carried round with it, and the
stone will also be able to incline in. any direction, although the centrifugal
foree of the rotating stone will tend to keep it in a horizontal position.
Figures 4, 5, and 6 shew the pieces j, k, and I separately, and Figure 7 shews
a plan of the three pieces together; Figure 8 is a section through the dotted
line A, B, Figure 3, of the piece e, which supports the upper grinding stone h;
Figure 9 is a section of the cross bar o taken through the dotted line C, D,
Figure 2; Figure 10 is a section of the same bar taken through the line E, F,
Figure 11, which is a plan view of part of the bar.
Having thus described the nature of the Invention, and the manner of
performing the same, I would have it understood that what I claim is the
combination of apparatus herein described for grinding grain and other
substances.
In witness whereof, I, the said George Tomlinson Bousfield, have hereunto
set my hand and seal, this Second day of November, in the year of our
Lord One thousand eight hundred and fifty-nine.
R. BROWNING,
of New Court,
St. Swithin's Lane, Gent".
GEO. T. BOUSFIELD. (L.S.)