CERTAIN NEW IMPROVEMENTS ON A MACHINE OR MILL FOR GRINDING BARK AND VARIOUS OTHER ARTICLES, FOR WHICH I OBTAINED LETTERS PATENT IN JANUARY ONE THOUSAND SEVEN HUNDRED AND NINETY-EIGHT, AND WHICH MACHINE OR MILL, SO IMPROVED, MAY BE APPLIED TO SEVERAL OTHER USEFUL PURPOSES
Year: 1801

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
WELDON, of the City of Litchfield, and County of the same, Engineer, send
greeting.
WHEREAS His most Excellent Majesty King George the Third, did, by
His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Seventeenth day of
February, in the forty-first year of His reign, give and grant unto me, the
said James Weldon, His especial licence that I, the said James Weldon,
during the term of years therein mentioned, should and lawfully might use,
exercise, and vend, within England, Wales, and. the Town of Berwick-
upon-Tweed, my Invention of "CERTAIN NEW IMPROVEMENTS ON A MACHINE
OR MILL FOR GRINDING BARK AND VARIOUS OTHER ARTICLES, FOR WHICH I OBTAINED
LETTERS PATENT IN JANUARY ONE THOUSAND SEVEN HUNDRED AND NINETY-EIGHT, AND
WHICH MACHINE OR MILL, SO IMPROVED, MAY BE APPLIED TO SEVERAL OTHER USEFUL
PURPOSES;" in which said Letters Patent there is contained a proviso obliging
me, the said James Weldon, by an instrument in writing under my hand
and seal, to cause a particular description of the nature of my said Invention,
and in what manner the same is to be performed, to be inrolled in His
Majesty's High Court of Chancery within one calendar month after the date
of the said recited Letters Patent, as in and by the same (relation being
thereunto had) may more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
James Weldon, do hereby declare my Invention of certain new improvements

page_text: on my said machine or mill for grinding bark for tanners, that the same
improvements extend to all kinds of cylindrical or steel mills for the purpose
of grinding wheat, malt, or any other kind of grain, and may be applied
to various other useful purposes, I describe the same as follows:-
My former method of constructing mills for grinding bark is chiefly of cast
iron, the teeth or cutters thereof cast with them, and the method of keeping
them sharp or renewing their teeth is to chip or cut them with a hammer and
chissel; and the method of making, and constructing what are commonly
called steel mills, for the purpose of grinding malt, &c., are chiefly made of
malleable iron, case-hardened, the teeth of which are cut or raised out of the
solid by means of chissels and files, and are kept sharp by the same method.
But in order to avoid these difficulties, and makes them more durable and
lasting, and that the users of such mills or machines may be able to sharpen
his own mill or machine and keep the same in repair without sending them to
the maker, I have constructed, them with loose or moveable teeth, which may
be taken out at any time, and by grinding them on a common grinding stone
may be sharpened and kept in order, or by replacing the teeth should they
wear out; the machine will then be as good as new. And to shew the nature
my Invention, I have added Drawings on the opposite side hereof; but as
the principle of the machine or mill for grinding bark is the same as that of
my former. Patent, it is not necessary to describe any more of it than the
manner in which the loose teeth are to be fixed, which may be the same as
that described in the, Drawing for a corn mill, or by any other method I may
think.most proper.
of
4
Figure 1st represents, the different parts of a mill for grinding bark, corn,
&c., and the manner in which it is constructed. A is a hopper, made of
wood, tin, or sheet iron, which receives the corn or any thing that is to be
ground. B is the axis of the ball or inner part of the mill, which may be
made of wrought or cast iron. C is a conical covering, which prevents the
materials to be ground from lodging on the cap, which may be made of wood,
tin; or sheet-iron. --D,-D,-is a loose-cap-which fastens and secures the loose.
teeth of the ball or inner part of the mill by means of four screws, represented
by h. E represents one side of the ball or inner part of the mill filled with
teeth. G shews one half of the inner part of the mill without teeth, wherein
may be seen the manner in which the teeth are kept in their places. d, d,
shews the substance of the metal, which is of cast iron. H, H, shews the
bottom flang that holds the teeth, and is cast with the body part of the cone.
a, a, a, shews the outer cylinder, which is cast altogether, and shews in what
manner the loose teeth F, F, are fixed in it. I, I, is a flang which fastens or

page_text: holds the loose teeth of the outer part of the mill by means of six screws,
as shewn by Figure 3d. K, K, is the bridge which carries the inner part
of the mill, and is fastened to the outer cylinder by means of two screws c, c.
L is the lower part of the axis. M, the brass step on which the axis works.
N is a plate in which the regulating screw works, and is made of wrought
iron. O, the regulating screw.
Figure 2d represents the under side of the outer cylinder, with the bridge
K and the box which contains the brass step M.
Figure 4th represents one of the loose teeth on the outer part of the mill.
Figure 5th represents one of the teeth on the inner part of the mill. These
teeth may be made of cast iron, wrought iron, or steel, or any metal or
materials that may be thought most proper.
These mills or machines are not confined to any precise forms or shape, and
may be made of any metal or materials I think most suitable. They may be
worked either as hand mills or horse mills, or by any other power that can be
applied to them.
In witness whereof, I, the said James Weldon, have hereunto set my
hand and seal, this Fifth day of March, in the year of our Lord
One thousand eight hundred and one