IMPROVEMENTS IN MILLS USED FOR CLEANING RICE and OTHER GRAINS
Year: 1874

page_text: LETTERS PATENT to Nicholas Twigge, of Liverpool, in the County of
Lancaster, for the Invention of "IMPROVEMENTS IN MILLS USED FOR
CLEANING RICE and OTHER GRAINS."
Sealed the 6th November 1874, and dated the 13th May 1874.
PROVISIONAL SPECIFICATION left by the said Nicholas Twigge at the
Office of the Commissioners of Patents, with his Petition, on the.
13th May 1874.
I, NICHOLAS TWIGGE, of Liverpool, in the County of Lancaster, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MILLS USED FOR CLEANING RICE AND OTHER GRAINS," to be as follows:-
This Invention relates to that species of mill commonly known as
the barley mill," in which a series of cylindrical stones or disks are
arranged on a horizontal axis, and are made to revolve inside a casing at
high velocity. These stones or disks are occasionally made of a hard
kind of composition laid in the plastic state over a perforated plate or
grating of iron, & entirely covering both sides of the same. In these
mills as thus constructed it is found that the composition has a tendency
to crack or peel off the aforesaid iron plate to the great detrement of the
mill itself, and of the rice or other grain undergoing the cleaning process
therein. I therefore substitute for the said perforated plate a flat open

page_text: network of stout wire (usually of about "No. 6" wire gauge, but varying
according to the size of the mill). It can be woven to any desired
pattern, but I prefer a simple annular wire on the outside, another bent
in the form of a hollow square to fit round the shaft in the centre, and
these two connected together by wires simply interlacing each other at
an angle with the radii of the circle. The whole is then covered in the
usual manner with the (aforesaid) composition.
SPECIFICATION in pursuance of the conditions of the Letters Patent,.
filed by the said Nicholas Twigge in the Great Seal Patent Office on
the 6th November 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, NICHOLAS
TWIGGE, of Liverpool, in the County of Lancaster, send greeting.
"WHEREAS Her most Excellent Majesty. Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of May, in the
year of our Lord One thousand cight hundred and seventy-four, in
the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Nicholas Twigge, Her
special licence that I, the said Nicholas Twigge, my executors,
administrators, and assigns, or such others as I, the said Nicholas
Twigge, 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 MILLS USED IN CLEANING RICE AND OTHER GRAINS," .upon
the condition (amongst others) that I, the said Nicholas Twigge, my
executors or administrators, by an instrument 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 immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Nicholas Twigge, do hereby declare
the nature of my said Invention, and in what manner. the same is to be
performed, to be particularly described and ascertained in. and by the
following statement:-

page_text: This Invention relates to that species of mill commonly known as the
barley mill, in which a series of cylindrical stones or disks are arranged
on a horizontal axis, and are made to revolve inside a casing at a high
velocity. These stones or disks are occasionally made of a hard kind of
composition laid in the plastic state over a perforated plate or grating of
iron, and entirely covering both sides of the same. In these mills as
thus constructed it is found that the composition has a tendency to
crack or peel off the aforesaid iron plate to the great detriment of the
mill itself, and of the rice or other grain undergoing the cleaning process
therein. I therefore substitute for the aforesaid iron plate a flat open
network of stout wire. It can be woven to any desired pattern, but
from repeated experiments I have found that simply interlacing the
wires at right angles, and bending their ends round over an annular
wire forming the circumference to be the best plan in practice. In our
mills (of which the composition disks are three feet five inches in
diameter and two inches thick) we make the wire disks two feet eleven
inches in diameter, thus leaving a clear margin of composition of three
inches. The wires are about Number Six Birmingham wire gauge, and
interlace each other at right angles, forming meshes about one and a
half inches square. There is a hole in the centre of the wire disk six
inches square, so as to admit of the driving shaft and all the wires that
would have otherwise crossed the space occupied by the hole are bent
round the four intact wires forming the sides of the square.
Now what I claim as my Invention is, the use of a metalic network as
a groundwork for composition in the disks of mills of the aforesaid
description.
In witness whereof, I, the said Nicholas Twigge, have hereunto set
my hand and scal; this Thirty-first day of October, in the year of
Witness,
W. P. THOMSON,
Patent Agent,
6, Lord Street,
Liverpool.
NICHOLAS TWIGGE. (L.S.).