Improvements in the Grinding Parts of Mills for Grinding Grain, Seeds, and other Substances and Materials.
Year: 1893

page_text: Date of Application, 16th Dec., 1893
Complete Specification Left, 3rd sept., 1894-Accepted, 6th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Grinding Parts of Mills for Grinding Grain,
Seeds, and other Substances and Materials.
WILLIAM NEWZAM NICHOLSON and WILLIAM MATHER, both of Newark
upon Trent in the County of Nottingham, Agricultural Engineers do hereby
declare the nature of our said invention to be as follows:-
The objects of our invention are to improve the output of grinding mills both
as regards the fineness and regularity of the products mainly by a new shape and
section of the grinding parts. As usually made the surfaces of the grinding parts
of mills are flat, or nearly so, the angles at which the fixed and moving parts
approach varying slightly but being closest at the periphery.
On our improved plan we form one or more concentric hollows in the stationary
grinder, and we form the moving grinder with one or more concentric projections
that fit into or correspond with the hollows of the stationary grinder allowing the
necessary interval between the moving and the fixed grinders for the passage of the
grain and grist, with suitable arrangement for their adjustment with regard to
each other.
Dated 16th December 1803
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.
COMPLETE SPECIFICATION.
Improvements in the Grinding Parts of Mills for Grinding Grain,
Seeds, and other Substances and Materials.
We, WILLIAM NEWZAM NICHOLSON, and WILLIAM MATHER, both of Newark
upon Trent, in the County of Nottingham, Agricultural Engineers, 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:-
The object of our invention is to improve the output of grinding mills both as
regards the fineness and regularity of product, mainly by a new shape and section
of grinding parts.
In the accompanying sheet of drawings
Figure 1 represents in section the cone and concave of an ordinary grinding mill
with our improvements added thereto.
As usually made the lower grinding surfaces of mills are flat or nearly so and
at right angles or approximately so with their axes. On our improved plan we
form one or more concentric hollows or corrugations 1 in the stationary grinder or
concave A, and we form the mowing grinder or cone B with one or more concentric
projections or corrugations 2 that fit into or correspond with the hollows 1 of the
stationary grinder A, allowing the necessary interval 3 for the passage of grain
and grist.
The cone B is mounted on the axis C and provided with an axial adjustment in
the concave A, so that it can be set to griud finer or coarser in the ordinary.
Inanner. As shown in the drawing the cone B is close up to the concave A in
position for fine grinding.

page_text: Having now described our invention and in what manner the same is to be carried
into effect, we declare that what we claim is :—
In grinding mills the use and application of grinding surfaces having hollows and
projections or corrugations, substantially as described and shown.
Dated 30th August 1894.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.