A MILL FOR GRINDING BARK AS IT FALLS FROM CUTTERS
Year: 1801

page_text: UDI
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
WHITBY, of Cullompton, in the County of Devon, Tanner; GEORGE BODLEY, of
the City of Exeter, Ironmonger; and JOHN DAVIS, of Cullompton aforesaid,
Dissenting Teacher, send greeting.
WHEREAS His present Majesty King George the Third, by His Letters -
Patent under the Great Seal of His United Kingdom of Great Britain and
Ireland, bearing date at Westminster, the Third day of September, One
thousand eight hundred and one, hath given and granted unto us, James
Whitby, George Bodley, and John Davis, our exors, adñors, and assigns,
special licence, full power, sole privilege, and authority to make, and exercise,
and vend, within that part of Great Britain and Ireland called England,
the Dominion of Wales, and the Town of Berwick-upon-Tweed, during the
term of. fourteen years therein expressed, our Invention of "A MILL FOR
GRINDING BARK AS IT FALLS FROM CUTTERS;" in which Letters Patent is
contained a proviso, obliging us, James Whitby, George Bodley, and
John Davis, or one of us, by an instrument in writing under our hands and
seals, or under the hands and seals of one of us, to cause a particular
description of the nature of our said Invention, and in what manner the
same is performed, to be enrolled in His Majesty's High Court of Chancery
within one calendar month after the date of the said recited Letters Patent.
NOW KNOW YE, that in compliance with the said proviso, we, the said
James Whitby, George Bodley, and John Davis, declare the descriptions_

page_text: plans, or Drawings, and references herein-after contained, do particularly
explain and ascertain the nature of our said Invention of a mill for grinding
bark as it falls from cutters, for which such Letters Patent were granted to us
as aforesaid, premising and wishing it to be understood that our said Letters
Patent extend only to the grinding of bark by means of circular cast-iron
plates, which are herein-after described, as the bark falls from cutters; pre-
mising further and wishing it to be understood that the dimensions and sizes of
the plates, the Drawing of which are here annexed, are taken from our
present models, but that they may be made of different dimensions if required.
The plates are divided into grooves or furrows as represented in Figure 1st,
B, B, or in Figure 2d, C, C; the grooves or furrows in the plates may be cut either
bevel, square, or hollow, but we consider the plans agreeable with the Drawings
in Figure 1st and 2d best. E, E, represents the eyes of the upper plates into
which the bark is admitted, through the center of which the perpendicular
shaft Q passes, and is admitted through the eyes F, F, of the lower plates.
The shaft Q has affixed to it the rynd P which supports the under plate, which
plate in this case is made to move round; we found that by giving motion to
the under plate instead of the upper, we facilitated the entrance of the bark into
the eye E of the upper plate; the bark is not in this case obstructed by the
rynd from falling between the plates, nor are the plates required so heavy, for
they are not liable to be borne up by the bark, as the upper plate would, if put
in motion, unless made very heavy. By running the under plates, both these
inconveniencies are avoided, and the mills can be rendered much cheaper.
D, D, D, D, are four fangs or projections through which are four holes to
fasten the plate to the frame; should the situation in which the mill is placed
require the upper plate to run, we reverse the grooves or furrows in plates.
B, B, or C, C; the grooves, or furrows in other respects would be formed upon
the principles above mentioned. The perpendicular shaft Q rest upon a brass
fixed on the bridge tree, which, by means of two screws, is rised or depressed
to grind the bark finer or coarser as the tanner may require it.
M represents
the front view of one of the cutters; N represents a side view of the same
when fixed on the arbors or axles L, O,'on which arbors or axles are fixed a
sufficient number of cutters, which cutters render the bark fit for the plates.
These arbors or axles on which the cutters are placed are put in motion by the
pinion K, which receives its motion from the horse wheel A, as is represented in
Figure 4, and the arbor and axle O is set in motion by a pinion fixed upon it,
which pinion receives its motion from a pinion fixed on the arbor or axle L;
from these cutters the bark is conducted into the eye of the top plate. The
plates may be set in motion by means of a common mill machinery, such as

page_text: are used in horse, water, or wind mills. We shall here give a succinch view of
our present machinery for a horse mill. A and T represent different sections
of the horse wheel; G and H, front and side views of the wheel and pinion,
which pinion receives its motion from the horse wheel A, and the wheel com-
municates motion to the pinion R upon the perpendicular shaft Q, which
carries round the plates B or C; these are shewn in Figure 3, with V, the
horse shaft, and Z, the mortise for the horse lever.
In witness whereof, we, the said James Whitby, George Bodley, and
John Davis, have hereunto set our hands and seals, this Sixteenth day
of September, in the forty-first year of the reign of our Sovereign Lord
George the Third, and in the year of our Lord One thousand eight
hundred and one.
of the City of Exeter, Attorney-at-law.
AND BE IT REMEMBERED that on the Sixteenth day of September, in
the year of our Lord 1801, the aforesaid James Whitby came before our Lord
the King in His Chancery, and acknowledged the Specification aforesaid, and
all and every thing therein contained and specified, in form above written.
And also the Specification aforesaid was stampt according to the tenor of the
Statutes made for that purpose.
Inrolled the Thirtieth day of September, in the year of our Lord
One thousand eight hundred and one.