A NEW CENTRIFUGAL DISC MASHING MACHINE
Year: 1863

page_text: LETTERS PATENT to Allen Michael Dearn, of Greenstead Works,
Colchester, in the County of Essex, Engineer, for the Invention of "A
NEW CENTRIFUGAL DISC MASHING MACHINE."
PROVISIONAL SPECIFICATION left by the said Allen Michael Dearn
at the Office of the Commissioners of Patents, with his Petition, on the
17th August 1863.
I, ALLEN MICHAEL DEARN, of Greenstead Works, Colchester, in the County
of Essex, Engineer, do hereby declare the nature of the said Invention for
"A NEW CENTRIFUGAL DISC MASHING MACHINE," to be as follows:-
This machine consists, firstly, of a cylinder with a support in the bottom,
which is to form a bearing for an upright shaft; on this shaft is a driving
rigger or pulley, which can be worked by either steam or other power, or by
band; at the lower end of the shaft is a disc, which revolves in the cylinder.
This disc must be placed just sufficiently far from the bottom of the shaft to
clear the bearing which supports the said shaft. This disc may be either a
perfect circle, or the outlines of the sides may either be flattened so as to make
it a polygon, or hollowed so as to make it a fluted figure, or of any other suitable
form; and the interior of the cylinder can be made either a perfect circle, a
polygon, or fluted, and it must be sufficiently large to allow a space sufficient for
the ready discharge of the malt meal and liquor from off the edges of the revolving
disc. The upper part of this said di-e may be either concave, convex, or plane,

page_text: and the upper surface is to be covered with spikes to act as beaters to the
malt meal; these spikes may be put in the surface of the dise at any angle,
and then bent in any direction, and may be placed in either concentric circles,
radiating lines, or otherwise, and any convenient number may be used. The
circumference of the said disc is to be also furnished with projecting spikes,
which radiate from the centre till nearly touching the cylinder; these are for
the purpose of breaking up any lumps of meal which may have escaped tho
action of the upright or bent spikes, the number of the radiating spikes may
be more or less or sufficient if required to completely tooth the edge of the disc.
The before-mentioned cylinder is to be furnished with a cover on the upper
part, and either through this said cover or by the side it is to receive the malt
meal from the malt hopper, spout, or any other contrivance; this is to be
regulated by a valve, and the cylinder is also to receive the liquor from the
liquor pipe, either through the cylinder cover or at its side, this pipe is to
regulate the supply by either a valve or cock. The meal and liquor when
mashed will fall around the edges of the revolving disc into a spout, trough, or
any other contrivance, which will convey it to the mash tub, but this said
spout, trough, or any other contrivance forms no part of the machine, for if
required the machine may be placed directly over the mash tub, and then it
might deliver the mash into it direct from the cylinder.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Allen Michael Dearn in the Great Seal Patent Office on the
17th February 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALLEN
MICHAEL DEARN, of Greenstead Works, Colchester, in the County of Essex,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of August, in the year of our Lord
One thousand eight hundred and sixty-three, in tho 27th year of Ver
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Allen Michael Dearn, Her special license that I, the said Allen
Michael Dearn, my executors, administrators, and assigns, or such others as
I, the said Allen Michael Dearn, my executors, administrators, or assigns,
should at any time agree with, and no others, from time to time and all
times thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain

page_text: and Ireland, the Channel Islands, and Isle of Man, an Invention for
"A NEW CENTRIFUGAL DISC MASHING MACHINE," upon the condition (amongst
others) that I, the said Allen Michael Dearn, my executors or adminis-
trators, by an instrument in writing under my hand and seal, or under the
hand and seal of one of them, 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 Allen Michael Dearn, 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 in writing, and on reference being had to the accompanying
Drawings, that is to say:-
This machine consists, firstly, of a cylinder with a support in the bottom,
which is to form a bearing for an upright shaft; on this shaft is a driving
rigger or pulley, which can be worked by either steam or other power, or by
hand. At the lower end of the shaft is a disc, which revolves in the cylinder.
This disc must be placed just a sufficient distance from the bottom of the shaft
to clear the bearing which supports the said shaft. This disc may be either a
perfect circle, or the outlines of the sides may either be flattened so as to make
it a polygon, or hollowed so as to make it a fluted figure, or of any other
suitable form, and the interior of the cylinder can be made either a perfect
circle, a polygon, or fluted, and it must be sufficiently large to allow a space
sufficient for the ready discharge of the malt meal and liquor from off the
edges of the revolving disc. The upper part of the said disc may be either
concave, convex, or plane, either with or without a small well to disperse the
liquor, and the upper surface is to be covered with spikes to act as beaters to
the malt meal; these spikes may be put in the surface of the disc at any angle,
and then bent in any direction, and may be placed in either concentric
circles, radiating lines, or otherwise, and any convenient number may be used.
The circumference of the said disc is to be also furnished with projecting spikes
which radiate from the centre till nearly touching the cylinder; these are for
the purpose of breaking up any lumps of meal which may havo escaped tho
action of the upright or bent spikes; the number of the radiating spikes may
be more or less or sufficient if required to completely tooth the edge of the
disc. The before-mentioned cylinder is to be furnished with a cover on the
upper part, and either through this said cover or by the side it is to receive
the inalt meal from the malt hopper, spout, or any other contrivance; this is

page_text: to be regulated by a valve, and the cylinder is also to receive the liquor from
the liquor pipe, either through the cylinder cover or at its side; this pipe is to
regulate the supply by either a valve or cock. The meal and liquor when
mashed will fall around the edges of the revolving disc into a spout, trough, or
any other contrivance, which will convey it to the mash tub, but this said
spout, trough, or any other contrivance forms no part of the machine, for if
required the machine may be placed directly over the mash tub, and then it
might deliver the mash into it direct from the cylinder.
Such being the nature and object of my said Invention for "A New
Centrifugal Disc Mashing Machine," I will now proceed to describe more in
detail the manner in which the same is to be or may be performed or carried
into practical effect. And in order that the same may be distinctly under-
stood, I have annexed hereunto a Sheet of Drawings illustrative thereof, and
have marked the same with letters of reference corresponding with those
in the following explanation thereof, that is to say :-
In the annexed Drawing, Fig. 1 is an exterior view of the machine; Fig. 2
is a vertical section taken through about the centre of the same; Fig. 3 is a
plan view of the top of the cylinder; Fig. 4 is an underneath view of the cylinder,
showing the footstep or support for the lower end of the vertical shaft; Fig. 5
is a plan view of the convex disc without any teeth; Fig. 6, a similar view
with the projecting spikes or teeth only on the edge; Fig. 7 shows one method
of drilling the holes for the vertical spikes, and Fig. 8 represents a side view
of the disc with its spikes all complete and fitted on to the lower end of tho
upright shaft. Similar letters of reference indicate corresponding parts of the
machine in the above respective Figures.
a, a, is a cylinder, which may be bolted to two upright supports by means
of the lugs or projecting flanges b, b; c, c, is the cover of the cylinder. At the
lower side of the cylinder a, a, is fixed a support e, e, carrying in the centre a
footstep or bearing for the lower end of a vertical shaft f.f, the upper end of
which latter is also to be supported in a suitable bearing (not shown in the
Drawing.) Near to the upper end of this shaft is fixed a driving rigger or
pulley g. 9, and by means of a strap passing round the latter the vertical shaft
is caused to revolve at a suitable speed. Near the lower end of the shaft f, f
is fixed the disc h, h, so as just to clear the bearing or footstep, and this disc is
provided with two sets of projecting teeth i, i, k, k, the teeth i, i, being arranged
so as to radiate horizontally from the circumference of the disc and nearly
touch the interior of the cylinder, whilst those marked k, k, project upwards
from the convex upper side of the disc, and are bent or curved outwards as
seen at Figs. 2 and 8. The cylinder cover c, c, is provided with two openings,

page_text: one of which marked is to receive the liquor through the pipe m, and the
other is furnished with a valve n, n, to regulate the supply of malt meal, which
is fed in through a hopper or spout placed immediately above the valve n, n.
The liquor pipe m must also be provided with a valve or cock to regulate the
supply. The meal and liquor when mashed will escape round the edge of tho
disc, and may pass off by the spout o, o, which will convey it to the mash tub;
or, as before described, the machine may, if preferred, be placed immediately
over the mash tub, so that the mash will fall directly therein.
Having now described the nature and object of my said Invention for
"A New Centrifugal Disc Mashing Machine," together with the manner in
which the same is to be or may be performed or carried into practical effect,
I would remark in conclusion that I claim as my Invention,-the particular
construction of the centrifugal disc mashing machine above described, and
exhibited in the annexed Drawings, or any mere modification thereof, operating
or working substantially in the same or a similar manner.
In witness whereof, I, the said Allen Michael Dearn, havo hereunto
set my hand and seal, this Thirteenth day of February, in the year
of our Lord One thousand eight hundred and sixty-four.
ALLEN MICHAEL DEARN. (L.S.)
Witnessed by
BRISTOW HUNT,
Sol. & Patent Agent,
1, Serle St., Lincoln's Inn.