improvements in Grinding mus.
Year: 1884

page_text: improvements in Grinding mus.
We WILLIAM NEWZAM NICHOLSON and WILLIAM MATHER, Agricultural
Engineers, both of Newark in the County of Nottingham, do hereby declaro
the nature of our Invention for IMPROVEMENTS IN GRINDING MILLS, to be as
follows:-
Our invention consists of Improvements in Grinding Mills which as heretofore
constructed have consisted of a cone revolving within a fixed concave.
In our Improved Mills the concave also is made to revolve either in the same or
the opposite direction to the cone but at a slower velocity. This has the effect of
preventing undue wear of any part of the concave and of making a finer and moro
uniform sample of grist.
In constructing our Improved Mill we fix the cone on the main shaft which
revolves in bearings carried on the frame of the mill in the usual manner. On this
frame we fix firmly, concentric to the main shaft, an annular or internal cog wheel
having a projecting flange. A disc is arranged to revolve on the main shaft within
the flange of the wheel, and to this disc the concave is fixed. A pinion, working
on a stud axle attached to the disc, gears into the annular wheel and also into
another pinion keyed on the main shaft, so causing the disc with the concave
attached to revolve in the same direction as the cone on the main shaft but more
slowly. By the addition of an "idle" pinion on the disc the concave may be mado
to revolve the reverse way to the cone.
Another method is to fix a countershaft running parallel with and (by preference)
below the main shaft which carries the cone. This countershaft may be driven
either by belt or gearing from the main shaft, and the concave, which is arranged
to revolve round the main shaft, is driven at the requisite reduced speed by belt or
gearing from the countershaft.
A flour dressing machine may be conveniently fixed and worked by. brushes
fixed to this countershaft.
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page_text: •
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 Invention for IMPROVEMENTS IN GRINDING MILLS, and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
Our Invention consists of Improvements in Grinding Mills which as heretofore
constructed have consisted of a cone revolving within a fixed concave.
In our improved Mill the concave also is made to revolve either in the same or
the opposite direction to the cone but at a slower velocity. This has the effect of
preventing undue wear of any part of the concave, and of making a finer and more
uniform sample of grist..
The appended sheet of Drawings shows the method of carrying out our Invention,
Figure 1 is a longitudinal section, Figure 2 is a transverse section on the line XX,
and Figure 3 is a transverse section on the line Y Y. In carrying out our Invention
we fix the grinding cone C on the main shaft S, which is driven by the pulley H
from the prime mover, or in any other convenient manner; and revolves in -
bearings B mounted on the mill frame A. On the mill frame A we fasten,
concentric to the main shaft S, an annular or internal cog wheel D furnished with
a projecting flange d. A disc E is arranged to revolve on the main shaft S within
the flange d of the internal cog wheel D, and to this disc the concave C¹ is attached.
A pinion F turning on a stud axle f, which is attached to the disc E, gears into the
annular wheel D and also into another pinion G. This pinion G is keyed upon
the main shaft S and revolves with it, and communicatos motion to the pinion F
in the direction shown by the arrows, with the effect, that whilst it revolves upon
its axle fan orbital motion is also given to it by the annular wheel D, and also to
the disc E and the attached concave C. The orbital motion so given is in same
direction as that of the main shaft S and cone C but slower in proportion to the
sizes given to the pinion G and the internal wheel D..
By the addition of an extra idle pinion K working on a axle k secured to the
disc E, as shown in dotted lines in the lower part of Figure 3, the motion of tho
disc E and the concave C¹ may be reversed and caused to revolve in a contrary'
direction to that of the main shaft S as shown by the arrows.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
The method of giving motion to the concaves of Grinding Mills, in the same or
opposite directions to that of the grinding cone, substantially as described and
illustrated in the sheet of drawings hereunto appended, or any incre modification
thereof,
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