IMPROVED APPARATUS TO BE USED IN THE MANUFACTURE OR PREPARATION OF CEMENT
Year: 1884

page_text: I JOHN WATSON of the firm of J. C. Johnson and Company, Cement Makers of
Greenhithe-on-Thames and Gateshead-on-Tyne do hereby declare the nature of said
Invention for IMPROVED APPARATUS TO BE USED IN THE MANUFACTURE OR
PREPARATION OF CEMENT" to be as follows:—
My Invention has for its object to provide means whereby flint and other hard
or heavy pieces liable to injure the grinding machinery can be effectually separated
from the "slurry" as it passes to the grinding apparatus.
"
The apparatus for effecting this according to my Invention consists of a trough
or passage through which the "slurry" flows at intervals in which trough or
passage stops or gates are provided against and over or through which the "slurry
passes. These stops or gates will cause the deposit of hard or heavy pieces and
this deposit may be facilitated by giving a vibratory or jogging movement to
the trough or passage. The matter thus deposited can be removed at intervals.
A trap or well may be provided at each stop or gate into which the deposited
matter is received and this trap or well may be provided with a double slide
arrangement one slide at top and one at bottom so that the upper one may be
closed when the under one is opened to allow of the escape of the deposited matter
without interrupting the flow of the "slurry." These wells may each be provided
with a partition (with a passage underneath it) which converts the well into a
syphon so that the "slurry" passes down into the well then under the partition and
up again into the trough or passage and so on with as many wells as there may be.
A slide may be arranged to stop the flow of "slurry" at each well when the
deposit is to be cleared therefrom.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London, W.C.,
Agent for the said John Watson,

page_text: I, JOHN WATSON of the firm of J. C. Johnson & Co Cement Makers, of
Greenhithe on Thames and Gateshead-on-Tyne do hereby declare the nature of
my invention for "IMPROVED APPARATUS TO BE USED IN THE MANUFACTURE OR
PREPARATION OF CEMENT" and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :-
My Invention has for its object to provide means whereby flint and other hard
or heavy pieces liable to injure the grinding machinery can be effectually separated
from the "slurry" as it passes to the grinding apparatus.
For this purpose I provide the trough or passage through which the slurry passes,
with stops or gates or wells or both in combination, against and into which the
slurry flows, depositing hard or heavy pieces at the foot of the stops or gates or in
the wells.
I will describe my Invention by reference to the accompanying drawings,
Figure 1 being a longitudinal section and Figure 2 a transverse section of part of
a slurry trough or passage provided with stops or gates according to my Invention
Figure 3 illustrates a modification as hereinafter described,
A, represents a portion of the trough or passage through which the "slurry"
flows at intervals towards the grinding machinery, in which trough or passage stops
or gates B are provided against and over or through which the "slurry" passes.
These stops or gates will cause the deposit of hard or heavy pieces and this deposit
may be facilitated by making a projecting lip to the stops or gates as shewn in the
drawing and also by giving a vibratory or jogging movement to the trough or
passage by any suitable arrangement. The matter thus deposited can be removed
at intervals by withdrawing the stops or gates from their side supports a—
A bandle b may be provided on the stops or gates to facilitate their withdrawal.
A trap or well C may be provided at each stop or gate B into which the deposited
matter is received and this trap or well may be provided with a double slide
arrangement, one slide o at top and another slide o at bottom so that the upper one
may be closed and the under be opened to allow of the escape of the deposited.
matter without interrupting the flow of the "slurry" through the trough or
passage A. These wells O may each be provided with a partition B³ with a passage
underneath it as shewn in Figure 3, which partition constitutes a stop and converts
the well into a syphon, so that the "slurry" passes down into the well C, then
under the partition B³, and up again into the trough or passage A, and so on with
as many wells as there may be.
An arrangement of slides o like that shewn in Figure 1 may be arranged
to stop the flow of "slurry” at each well when the deposit is to be cleared
therefrom.
In Figure 8 I have shewn a gate B as being used, but if desired when I use the
stop or partition B' the gate B may be dispensed with.
It will be evident that one or any desired number of these depositing arrange-
ments may be employed in the trough or passage and although I have shown the
said gates as being removable they may be fixed if desired but this will not be so
convenient.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is :-
In apparatus for the manufacture or preparation of cement the combination with
the trough or passage through which the "slurry" passes towards the grinding

page_text: machinery of a stop or gate or stops or gates (whether in combination or not with
a well or wells) for causing the deposit of hard or heavy pieces which would be
likely to injure the grinding machinery, substantially as hereinbefore described and
illustrated under several modifications in the accompanying Drawings.
Dated this fifteenth day of December 1884.
J. HENRY JOHNSON,
Agent for the said John Watson.