IMPROVEMENTS IN APPARATUS FOR GRINDING CORN, SEEDS, AND MINERALS
Year: 1865

page_text: PROVISIONAL SPECIFICATION: left by the said James Priestley, William
Whitworth, and John Sutcliffe, at the Office of the Commissioners of
Patents, with their Petition, on the 7th October 1865.
We JAMES PRIESTLEY, WILLIAM WHITWORTH, and JOHN SUTCLIFFE, all of
Sowerby Bridge, near Halifax, in the County of York, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR GRINDING
CORN, SEEDS, AND MINERALS," to be as follows:-
לחוד
...This Invention relates to ordinary disc grinding stones, where' 'one stone
is fixed upon a horizontal bed called a "hurst plate" and another stone
mounted above the bed stone on a vertical rotary spindle which gives motion
thereto, the flat faces of the two stones being in near contact, and corn, seeds,
or minerals to be ground are conducted through the middle of the running
stone to and betwixt the surfaces thereof, and passing out on every side or at
every part, of their circumference.
Our improvements consist in constructing the hurst plate with a series of
openings at and around the edge of the bed stone, the casing being applied at
and around the outer sides of the openings, so that the ground' corn, seeds, or
minerals may pass direct away from the edge of the stone at every part

page_text: thereof; also in constructing and applying one or more conical and concentric
spouts so as to fit underneath and embrace the whole series of openings to
receive the ground corn, seeds, or minerals, and conduct the same to the place
or places required.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Priestley, William Whitworth, and John Sutcliffe in
the Great Seal Patent Office on the 6th April 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
PRIESTLEY, WILLIAM WHITWORTH, and JOHN SUTCLIFFE, all of Sowerby Bridge,
near Halifax, in the County of York, send greeting....
"
WHEREAS 'Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of October, in the year of our Lord One
thousand eight hundred and sixty-five, in the twenty-ninth year of Her reign,
did, for Herself, Her heirs, and successors, give and grant unto us, the said
James Priestley, William Whitworth, and John Sutcliffe, Her special licence
that we, the said James. Priestley, William Whitworth, and John Sutcliffe,
our executors, administrators, and assigns, or such others as we, the said
James Priestley, William. Whitworth, and John Sutcliffe, our 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 APPARATUS FOR GRINDING CORN,
SEEDS, AND MINERALS," upon the condition (amongst others) that we, the said
James, Priestley, William Whitworth, and John Sutcliffe, our executors or
administrators, by an instrument in writing under our, or their, or one
of our or their hands 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 we, the said James Priestley, William Whitworth,
and John Sutcliffe, do hereby declare the nature of our said Invention, and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement and accompanying Sheet of
Drawings (that is to say) :-

page_text: This Invention relates to ordinary disc grinding stones, where; one stone
is fixed upon a horizontal bed called a hurst plate; and another. stone is
mounted above the bed stone on a vertical rotary spindle which gives motion
thereto, the flat faces' of the two stones being in near contact, and corn, seed,
or minerals 'to be'ground are conducted through the: middle of the: running
stone to and betwixt the surfaces of the two-stones, and. passing out on every
side or at every part of their circumference. >>
"
L
Our improvements consist in constructingi the hurst plate' with a series of
openings at and around the edge of the bed stone, the casing. being applied at
and around the outer sides of 'the openings; so that the ground .corn; seeds; or
minerals may pass direct away from the edge of the stone at every part
thereof; and in' constructing and applying one or inores conical and concentric
spouts so as to fit underneath and embrace the whole series of openings 'to
receive the ground corn, seeds, or minerals, and conduct the same to the place
or places required." ...!
DESCRIPTION OF THE DRAWINGS....
... :
.
Fig. 1 is an elevation, Fig. 2 is a plan taken through the line A, B, in
Fig: 1, and Fig. 3 is a vertical 'section taken through the line C, D;.in. Figs.
1 and 2,' of 'apparatus for grinding corn, seeds, or minerals constructed
according to this Invention:..
The ordinary running stone E is mounted in the usual manner on cross
arms E fixed upon a vertical rotary spindle E..: The bed stone F is fixed
upon a bed plate G, technically known as the "hurst plate," the construction
of which forms one part of these improvements. A series of openings H are
made in this plate around the edge of the bed stone, and a circular flange or
rim I is cast or fixed thereon at a sufficient distance from the edge of the
stone to allow space for the ground corn, seeds, or minerals to pass coff from
the edges of the stones and thence betwixt the edge of the bed stone and the
flange through the openings of the said hurst plate or bed plate. Blocks J
are fixed betwixt the edge of the bed stone and the flange at the intervals
betwixt the openings, which blocks taper upwards to a thin edge or point so
as to prevent any lodgement of the ground materials on those parts of the
hurst plate. Set screws K are provided in the flange for setting or adjusting
and fixing the bed stone in its proper position, and a casing or cover Lis
placed over the running stone fitting to and resting upon the flange to protect
and to guide the ground. materials: Underneath the openings of the plate are
fixed two conical and concentric or annular spouts M, N, which together
embrace the whole of the openings and terminate in ordinary spouts O, P, for

page_text: conducting the ground materials to a trough or bin or to any other place
required. These spouts are provided with doors R and S to be opened to
admit of the spouts being cleansed should, they require it. An ordinary
hopper T is fixed above the easing or cover for the supply of materials to
be ground. By these improvements the stones are kept cool and in good
condition, and thus enabled to grind a greater quantity than heretofore.
Having thus fully described the nature of our said Invention, and shown
'the manner in which the same is to be or may be performed, we would have
it understood that we do not confine or restrict ourselves to the precise details
of construction or arrangement of apparatus as herein: shown and described, as
it will be evident various modifications may be made without departing from
the main features of this Invention; ¡as for instance, more or less number
of openings may be made in the burst plate and of different dimensions, oE
the conical spouts may he made in more than two, or in one only, but for
convenience we prefer two, as herein shewn, but what we claim as of our
Invention is,―
Firstly, constructing the hurst plate or bed plate in manner and for
purposes substantially as herein shewn and described.
*IT
Secondly, the construction and application to such plates of one or mone
conical, concentric, or annular spouts, so as to embrace the openings thereof
and conduct the meal or ground materials away from the stones immediately
after being ground.
In witness whereof, I, the said John Satcliffe, for and on behalf of myself
and the said James Priestley and William Whitworth, have hereunto
hand and seal, this Fifth day of April, One thousand. eight
set
my
Signed,,sealed, and delivered by the
within-named John Sutcliffe, in
the presence of::
WILLIAM TASKER,
Patent Agent,
Halifax...
JOHN SUTCLIFFE... (LS.)";
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