Improvements in Horizontal Grinding Mills.
Year: 1888

page_text: Date of Application, 27th Nov., 1888
Complete Specification Left, 27th Aug., 1889-Accepted, 12th Oct.,
1889
PROVISIONAL SPECIFICATION.
Improvements in Horizontal Grinding Mills.
I, FREDERICK WILLIAM FOLLOWS, of Gorton, in the County of Lancaster
Agricultural Engineer, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to provide a mill in which the material may be
acted upon any number of times by the stones before being permitted to escape
therefrom.
It consists essentially in making the top or upper grinder in two or more parts
cut in such a manner that the material to be ground may be held in the mill for
any length of time and consecutively passed any number of times under each part
of the grinding stone.
In carrying out the invention the grinding discs may be made of iron, stone, or
other material now employed for the purpose. The bottom or revolving disc is
made and dressed in the usual way.
Instead of a top disc as ordinarily constructed, I prefer to make the top stone in
two parts, or so cut as to form a blank or division space down the face of it. One
corner of each of these stones is cut away to leave room for a
guide which directs
the material towards the centre and under the other stone which is chamfered off to
receive it. . In this way the material to be ground may be held for any length of
time in the mill, and consecutively passed by means of the guides from one stone to
the other and thus ground again and again. The invention will be found equally
applicable to dry or moist material which requires to be ground to a very fine state
of sub-division.
Dated this 26th day of November 1988
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Horizontal Grinding Mills.
I, FREDERICK WILLIAM FOLLOWS,, of Gorton, in the County of Lancaster,
Agricultural Engineer, 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 :-
The object of this invention is to provide a grinding mill with horizontal grinding
discs or stones in which the material under treatment may be acted upon any
required number of times or passed between the grinding surfaces again and again
for any length of time before being permitted to escape therefrom.
It consists essentially in making one of the grinding discs or stones-preferably
in two parts-with a radial indentation or space at one two or more points in the
periphery through which the material as it escapes from the edges of the grinding
discs or stones may be passed in again between the grinding surfaces without being
removed from the mill.
The invention will be fully described with reference to the accompanying
drawings :-
Fig. 1, being a sectional elevation of mill constructed according to my invention
and
Fig. 2, a sectional plan of same on line x-y.
The grinding discs are made of stone, (either natural or artificial) iron or other
material which may be employed for the purpose.

page_text: The casing A, of the mill may be made of any suitable shape or material to
enclose the grinding discs or stones. The bottom grinding disc or stone B. is mounted
on the rotating spindle C. and caused to rotate therewith in the ordinary way. The
top grinding disc or stone I prefer to make in two parts D. D₁, or so cut as to
form a blank or division space E radiating from 'the centre of it.
The space or
indentation E is sufficiently wide at the periphery of the disc or stone to provide
room for guide plates or scrapers F. Around the rotating stone B and projecting
upward from its grinding surface is a ring or annular casing G which encircles the
other disc forming a chamber g in which the material collects as it is propelled
outwards by the centrifugal action of the revolving disc or stone. The guide plates
or scrapers F direct the material which has collected in the chamber 9 back towards
the centre and between the grinding surfaces. In this way the material under treat-
ment may be held for any length of time in the mill and is by the plates or scrapers F
passed again and again between the grinding surfaces.
The top grinding disc or stone D. D' is attached to the stationary plate or disc A¹
which is secured by four lugs a to the casing A. It is provided with a hopper H
through which the material is delivered to the eye d of the grinding disc. The
material is withdrawn from the chamber g through a small sliding door placed in any
part of the circumference of the ring or annular casing G and is finally discharged
from the mill through the opening a¹ in the casing A.
I have shown and described the mill in the form I prefer to make it with the
bottom grinding disc or stone rotating and the top one fixed or stationary and also
with the top one divided into two separate parts but it is obvious that this may be
modified or altered in several ways and still retain the essential feature of my
invention which consists in the special formation of one of the grinding discs as for
instance :-
a). The specially constructed disc may be caused to revolve instead of being
fixed, or
6). The specially constructed disc whether fixed or revolving may be made in one
piece with one or more indentations or spaces cut in the periphery thereof.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I wish it to be understood that I am
well aware that in grinding mills with vertical stones known as edge runners scrapers
are provided to direct the material again and again under the stones and for such
I make no claim but I declare that what I claim is :-
1. A horizontal grinding mill having one of the grinding discs (preferably in two
parts) formed with one or more openings or spaces through which the material may
be retained again and again between the grinding surfaces substantially as described.
2. A horizontal grinding mill having one or more spaces formed in the periphery
of one of the grinding discs, a ring or annular casing attached to the other forming a
chamber to collect the material, and scrapers or guides to direct the material towards
the centre substantially as and for the purposes described.
3. A horizontal grinding mill having the various parts constructed and arranged
substantially as described and shown.
Dated this 26th day of August 1880
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.