IMPROVEMENTS IN MACHINERY FOR REDUCING FRIABLE SUBSTANCES TO POWDER
Year: 1865

page_text: LETTERS PATENT to Henry Walker Wood, of Cardiff, in the County of
Glamorgan, Esquire, for the Invention of "IMPROVEMENTS IN MACHINERY
FOR REDUCING FRIABLE SUBSTANCES TO POWDER."
Sealed the 24th October 1865, and dated the 27th April 1865.
PROVISIONAL SPECIFICATION left by the said Henry Walker Wood
at the Office of the Commissioners of Patents, with bis Petition, on the
27th April 1865.
I, HENRY WALKER WOOD, of Cardiff, in the County of Glamorgan,
Esquire, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN MACHINERY FOR REDUCING FRIABLE SUBSTANCES TO POWDER," to be as
follows:-
My machinery consists of a polygonal case or chamber provided with
trunnions supported in bearings to admit of the case being made to rotate,
and furnished on the inside with one or more, by preference two, rollers, which
are inserted and work in a line parallel or nearly so to the axis of the case.
A door for admitting the substance into and withdrawing it from the case is
fitted at some part of the rim. The reduction of the substance to be operated
upon, after being placed in the case with or without the addition of liquid, is
effected by imparting rotary motion to the case, when the substance will be

page_text: continually turned over and over, and will be subjected to the action of the
rollers, and by continuing the operation for a period, depending on the nature
of the substance, it will be reduced to fine powder.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Walker Wood in the Great Seal Patent Office on
the 27th October 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
WALKER WOOD, of Cardiff, in the County of Glamorgan, Esquire, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of April, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Henry Walker Wood, Her special licence that I, the said Henry
Walker Wood, my executors, administrators, and assigns, or such others
as I, the said Henry Walker Wood, 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 MACHINERY FOR REDUCING FRIABLE SUBSTANCES TO POWDER,"
upon the condition (amongst others) that I, the said Henry Walker Wood,
my executors or administrators, by an instrument in writing under my, or
tbeir, or one of their bands 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 Henry Walker Wood, 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 thereof, reference being had to the .Drawings hereunto
annexed, that is to say:-
My machinery consists of a polygonal case or chamber provided with
trunnions supported in bearings to admit of the case being made to rotate,
and furnished on the inside with one or more, by preference two, rollers, which
are inserted and work in a line parallel or nearly so to the axis of the case.

page_text: A door for admitting the substance into and withdrawing it from the case is
fitted at some part of the rim. The reduction of the substance to be operated
upon, after being placed in the case with or without the addition of liquid, is
effected by imparting rotary motion to the case, when the substance will be
continually turned over and over, and will be subjected to the action of the
rollers, and by continuing the operation for a period depending upon the nature
of the substance, it will be reduced to fine powder.
The manner in which I prefer to construct my machinery is represented in
end elevation in Figure 1, and in side elevation partly in section. In Figure 2
of the accompanying Drawings A is a hexagonal case or chamber, the periphery
of which is sometimes formed in segments B, B, secured to each other by
bolts a, a, as shown, and sometimes the case is cast whole. When in segments
they are provided with flanges C at their ends, to which the end plates D, D,
of the case are bolted. The case A is furnished with trunnions E, E,
supported in bearings F, F, to admit of the case being turned by means of a
handle G, on the shaft of a pinion H, in gear with another pinion I, on one
of the trunnions E. When the case is to be made to revolve, by steam or
other power, then I fit fast and loose pulleys on a shaft or continuation of one
of the trunnions E; J is a roller inserted in the case A, parallel to the axis of
the case; K is a door for admitting the substance into and withdrawing it
from the case. The corners of the case in the inside are rounded as shewn
when the material is to be reduced to powder in a dry state. Where liquid is
used I sometimes leave more acute angles in the corners.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim constructing
machinery for reducing friable substances to powder, consisting of a polygonal
case or chamber furnished with one or more rollers, and made to rotate
substantially as herein-before described.
In witness whereof, I, the said Henry Walker Wood, have hereunto
set my hand and seal, this Twenty-fourth day of October, One thousand
eight hundred and sixty-five.
Witness,
MARY DAVIES,
Domestic Servant.
HENRY. WALKER WOOD. (L.S.)