Improvements in Grinding and Crushing Mills.
Year: 1896

page_text: Date of Application, 26th Nov., 1896
Complete Specification Left. 20th Aug., 1897-Accepted, 2nd Oct., 1897
We EDWARD HENRY 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:-
Our Invention has for its object improvements in that class of grinding or crushing
nill, which are provided with concaves below the grinding or crushing rollers, the
substances to be operated upon passing first between the rollers and then between the
rollers and their concaves.
As heretofore usually constructed the concaves are made with eyes on their inner
ends through which passes a shaft or bolt, carried by the frame of the mill, and
forming a joint upon which the concaves can pivot to allow for adjustment to their
rollers, and are consequently difficult to remove for cleaning or repair.
Our invention is for improvements in the method of supporting the concaves, and
consist in making both their ends with a groove or recess. The inner end groove or
recess drops loosely over a bar attached to the frame of the mill or over projections
made on the frame of the mill for that purpose, and hinges thereon. The outer end
groove or recess drop on a tee or stirrup shape headed bolt, by means of which it can
be adjusted to its roller. Upon loosening the bolt the concave is released from its
supports and can be at once removed without disturbing any other portion of the
mill.
Improvements in Grinding and Crushing Mills.
EDWARD HENRY NICHOLSON and WILLIAM MATHER, both of Newark upon Trent in
the County of Nottingham, Agricultural Engineers, do hereby declare the nature of
their said invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
Our invention has for its object improvements in that class of Grinding or Crushing
Mills which are provided with concaves below the grinding or crushing rollers, the
substances to be operated upon passing first between the rollers, and then between
the rollers and their concaves.
As heretofore usually constructed the concaves are made with eyes on their inner
ends through which passes a shaft or bolt, carried by the frame of the mill, and
forming a joint upon which the concave can pivot to allow for adjustment to their
rollers, and are consequently difficult to remove for cleaning or repair.

page_text: Our Invention which is shown in Figures 1 and 2 of the accompanying sheet of
drawings is for improvements in the method of supporting the concave A and consists
in making both of its ends with a groove or recess 1 and 2. The inner end groove or
recess 1 drops loosely over a bar B attached to the frame of the mill, or over projec-
tions made on the frame of the mill for that purpose and hinges thereon. The outer
end groove or recess 2 drops on a tee head or stirrup shaped bolt C, by means of
which it can be adjusted to its roller D. Upon loosening the bolt C the concave A is
released from its supports B and C and can be at once removed without disturbing
any other portion of the Mill.
Having now particularly described the nature of our invention and how the
the same is to be performed what we claim is :-
1. Forming the concave of Grinding Mills with grooves or recesses 1 and 2 at their
ends.
2. The combination of the grooved or recessed concaves A with a supporting bar B,
and an adjusting tee headed or stirrup shaped bolt C, substantially as shown and for
the purpose described.
BARA 2001 August fo
GEO. DOWNING,
8 Quality Court, London, W.C., Agent.
GEO.
DOWNING,
8 Quality Court, London, W.C., Agent.