CERTAIN IMPROVEMENTS IN THE GRINDING
Year: 1843

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
BRYAN CORCORAN, of Mark Lane, in the City of London, Gentleman,
send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria,
by Her Letters Patent under the Great Seal of Great Britain, bearing
date at Westminster, the Twenty-fifth day of August, in the seventh
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Bryan Corcoran, my exors, adiiors, and
assigns, Iler especial licence, full power, sole privilege and authority,
that I, the said Bryan Corcoran, my exors, adññors, and assigns, and
such others, as I, the said Bryan Corcoran, my exors, adñiors, or
assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term of years therein
expressed, should and lawfully might make, use, exercise, and vend,
within that part of Her Majesty's United Kingdom of Great Britain
and Ireland called England, Her Dominion of Wales, and the Town
of Berwick upon Tweed, an Invention, communicated to me by a certain
foreigner residing abroad, of "CERTAIN IMPROVEMENTS IN THE GRINDING

page_text: OF WHEAT AND OTHER SUBSTANCES;" in which said Letters Patent there
is contained a proviso, that I, the said Bryan Corcoran, shall cause a
particular description of the nature of the said Invention, and in what
manner the same is to be performed, under my hand and seal, to be
inrolled in Her said Majesty's High Court of Chancery within six
calendar months next and immediately after the date of the said in
part recited Letters Patent, as in and by the same, reference being
thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the
said Bryan Corcoran, do hereby declare that the nature of the Inven-
tion communicated to me as aforesaid, and in what manner the same
is to be performed, are fully described and set forth in and by the
following Specification thereof, reference being had to the illustrative
Drawings hereunto annexed, that is to say:
The nature of the said Invention consists in providing means for the
admission of air between the grinding surfaces of the two mill stones
ordinarily employed in flour mills, and thereby keeping the corn or
other material to be ground, and also the faces of the stones themselves,
constantly cool. And the manner in which the said object is effected
is represented in the Drawings hereunto annexed.
Figure 1 of these Drawings is the top view of the upper of a pair of
mill stones, with certain additions to and alterations made therein for the
purposes aforesaid; Figure 2 is an under view thereof; and Figure 3
a vertical section on the line A, B, of Figure 1. C, is the mill stone;
D, the eyehole; and E, the cross; F, is an iron case which encircles
the mill stone, and rises above it to the height shown in the vertical
section Figure 3; it is open at top, but has a solid bottom a, which
rests on the top of the mill stone, and a collar b, by which it is attached
to the cross E, so that it may revolve along with the stone; G, G, G, G,
are four radial vanes which extend from the collar b, to the inner
circumference of the upper part of the case, and are inclined forwards
in the direction in which the mill stone revolves; H, H, H, H, are
four openings made through the bottom a of the case and the stone
beneath, immediately before the vanes G, G, G, G, for the admission
of the air between the grinding surfaces.

page_text: As the stone and case revolve, the air is driven down through these
apertures by the resistance it meets with from the vanes; K, K, K, K,
are guide plates for the purpose of directing or inclining the air into
the openings H, H, H, H.
And having now described the nature of the said Invention com-
municated to me as aforesaid, I declare that I do not restrict myself
to any number of vanes or openings in the stones and case, nor to any
particular shape to be given to the same, but reserve to myself the
right to vary them at pleasure, so long as the peculiar system of action
before described is not essentially departed from. And I declare that
what I claim is, the method above described of admitting air between
the grinding surfaces of mill stones for the purpose of keeping cool
the said surfaces and the materials ground by them.
In witness whereof, I, the said Bryan Corcoran, have hereunto
set my hand and seal, this Nineteenth day of February, One
thousand eight hundred and forty-four.
Enrolled the Twenty-fourth day of February, in the year of our
Lord One thousand eight hundred and forty-four.