Year: 1887

page_text: Date of Application, 16th May, 1887
Specification Accepted, 29th Mar., 1888
1, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, and Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
This invention relates to apparatus for grinding grain and other materials.
The said invention consists essentially in the employment of a single grooved roller
of chilled cast-iron which rotates in proximity to a sector of like material having
graduated grooves; and in means for regulating the distance between these two
parts, in order to grind to the desired degree of fineness.
By means of my present improvements I am able to obtain a product superior to
that which is obtained by means of the apparatus at present in use.
Having thus enunciated the object of my invention I will proceed, by the aid of the
accompanying drawings given by way of example only, to describe the improved
apparatus.
In the said drawings
Figure 1 is a side elevation of the said apparatus, and,
Figure 2 is a front view of the same.
Fig. 3 is a section of the hopper showing the distributing roller.
Upon the shaft a which turns in bearings b fixed to the frame XX, are keyed
the driving pulley Y, the grooved roller A of chilled cast iron and the fly wheel Z
Opposite and in proximity to the roller A is the grooved sector B also of chilled
cast iron, which sector covers about of the circumference of the said roller, but
in such a manner that the space between the sector and roller shall be tapering with
and opening, for example, of 60 millimetres at its upper part while it is reduced to
nearly 0 millimetres at its lower part. By this construction the material is gradually
broken as it passes down between the sector and roller.

page_text: The sector B is connected by rods c c³ to excentrics fg keyed upon the shafts h h¹.
The latter carry two toothed wheels m m actuated by the pinion m¹ and serving to
regulate the position of the eccentrics that determine the distance between the sector
and the roller.
The feed of corn or other material through the hopper O to the grinding roller A
is regulated by means of a small roller which distribute the said material over the
entire width of the grinding roller. This feed roller is driven from the driving shaft a
through the medium of the pulley P mounted upon the shaft p and a pinion also
mounted upon the said shaft which engages with the toothed wheel upon the same
shaft as the roller 1, this wheel engages with a pinion upon the shaft of the mixer n
Fig. 3.
The advantages of my improved apparatus are larger production, less waste and less
consumption of driving power than heretofore. Also when grinding corn the heating
of the flour is obviated so that the flour leaves the mill in a fresh condition.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed as communicated to
me by my foreign correspondents I declare that what I claim is :-
First. In a grinding mill the employment of a single roller turning in proximity to
a fixed sector at the desired distance from the roller and in such a manner that the
material to be ground is gradually reduced during its passage between the two
surfaces, to the desired degree.
Second. Means substantially as hereinbefore described for regulating the distance
between the sector and roller."
Third. The improved apparatus constructed substantially as hereinbefore described
with reference to the accompanying drawing by which coarse as well as fine grinding
can be performed.