Year: 1887

page_text: Date of Application, 16th Apr., 1887
Complete Left, 14th Jan., 1888
Complete Accepted, 17th Feb., 1888
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 :-
-
Our invention relates to the rollers of grinding and crushing mills, which are made
up of a series of discs placed upon a square or polygonal shaft, and is for improve-
ments whereby the discs are made interlocking one with another. Upon one face of
each disc we form radial projections and upon the other face are made corresponding
recesses, so that when the discs are placed upon the shaft the projections on one disc
take into the recesses of the next disc and so interlock, that the longitudinal bolts
that pass through the series of discs to hold them together are relieved from all
shearing or bending strain. Instead of the discs being placed direct upon the shaft
we increase the size of the holes in the discs and place them upon a bush of a square
or polygonal section and a length equal to that of the roller; the shaft fits the interior
of the bush and is prevented from turning in it by a key-way, or being made of a
square or polygonal section. By these means the discs have no tendency to gall or
cut into the shaft and it can always be drawn out end ways from the rollers without
difficulty.

page_text: COMPLETE SPECIFICATION.
Improvements in the Rollers of Grinding and Crushing Mills.
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 saine is to be performed, to
be particularly described and ascertained in and by the following statement :-
Our invention relates to the rollers of grinding and crushing Mills which are made
up of a series of discs placed upon a square or polygonal driving shaft, and is for
improvements whereby the discs are made interlocking one with another.
In Figures 1 and 2 of the accompanying sheet of drawings the discs A that make
up the rollers are placed directly upon the square or polygonal shaft C, and have
formed upon them the radial projections B. When the discs A are in position, as
shown in Figure 2, the projections B engage with recesses formed for them in the
backs of the adjoining discs and the whole series are interlocked so that the bolts D,
which hold the discs together, are relieved from all shearing and bending strain.
Instead of the discs A being placed direct upon the shaft C, we increase the size of
the holes in the discs A and place them upon a bush of a square or polygonal section E,
as shown in Figures 3 and 4. The shaft C fits the interior of the bush E and is
prevented from turning in it by means of a key e, or the shaft C may be of a square
or polygonal section as shown in Fig. 1.
By thus mounting the discs A upon the bush E they have no tendency to gall or
cut into the shaft C, and it can always be drawn out end ways from the roller without
difficulty.
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:-
1. In the rollers of Mills that are made up of a series of discs the use of the
radial projections B engaging with corresponding recesses in the adjoining discs,
substantially as shown and for the purposes set forth.
2. In the rollers of Mills that are made up of a series of discs the use of the bush E
substantially as shown and for the purposes set forth.
Dated 14th January 1888