Improvements in Filter Presses.
Year: 1887

page_text: Date of Application, 25th Feb., 1887.
Complete Left, 7th June, 1887.
Complete Accepted, 8th July, 1887.
Improvements in Filter Presses.
JOHN CRITCHLOW, Engineer, Phoenix Works, Longton, Staff. THOMAS FORESTER,
WILLIAM FORESTER, HERBERT FORESTER, and LEONARD FORESTER, Earthenware
Manufacturers, Phoenix Works, Longton, and Falcon Works, Hanley, do hereby
declare the nature of this invention to be as follows :-
Our invention relates to improvements in filter presses for filtering or extracting
the solid particles from the liquids used in the manufacture of German Yeast,
Paraffin and the like substances; the usual method being to force the liquid to be
filtered through cloths which are generally folded in the shape of bags and contained
in suitable frames.
In place of thus using cloths for filtering said substances, we employ a porous
composition, consisting of Charcoal, Blue clay, Ball clay, China clay, Flint and Stone
mixed together and fired, after which process the resulting porous cakes are placed in
suitable receptacles called trays, and which are provided with supply pipes and
eduction apertures for the entering and escaping fluids, any convenient number of
these trays may be used according to the quantity of fluid required to be filtered.
Filter presses constructed according to our invention will not only be more durable,
but will also be free from the cost and annoyance caused by the busting of cloths.
Said filter presses may also be used for filtering Chemicals, sewerage and the like.
Dated this 23rd day of February 1887.
BILLINGTON & NEWTON,
Agents for Applicants.

page_text: Improvements in Filter Presses.
JOHN CRITCHLOW, Engineer, Phoenix Works, Longton, Staff. THOMAS FORESTER,
WILLIAM FORESTER, HERBERT FORESTER, and LEONARD FORESTER, Earthenware
Manufacturers, Phoenix Works, Longton, and Falcon Works, Hanley, 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 :-
Our invention relates to improvements in filter presses for filtering or extracting
the solid particles contained in the liquids used for the manufacture of "German
Yeast,"
," "Paraffin," and like substances; the usual method being to force the liquid
to be filtered through cloths, which are generally folded in the shape of bags, and
contained in suitable frames.
In place of thus using cloths for filtering said liquids, we employ a porous com-
position, consisting of, Charcoal, Blue clay, Ball clay, China clay, Flint and Stone all
mixed together with water, formed into cakes and fired; after which process the
resulting porous cakes are placed in suitable receptacles called trays; said trays being
provided with supply pipes and eduction apertures for the entering and escaping
liquids. Any convenient number of these trays may be used according to the quantity
of liquid to be filtered.
Filter presses constructed according to our invention will not only be more
durable, but will also be free from the cost and annoyance caused by the bursting of
cloths. Said filter presses may also be used for filtering chemicals, sewerage, and
the like.
The accompanying drawings clearly illustrate our invention, the same letters
referring to the corresponding parts in each figure. Fig. 1 is a front view. Fig. 2,
a side view with one tray shewn in section.
The trays A consist of rings forming two recesses in each, separated by a disc E,
as shewn at section of tray fig. 2, both faces of each disc are provided with small
grooves B running from top to bottom, where they are connected to outlet holes H.
Each face of said disc is covered with a cake of the before named porous com-
position C, placed over the grooves and partly filling the recesses, the remaining
spaces F being intended to receive the solid particles filtered out of the liquid.
In order that the trays may joint tightly when pressed together by screw D, one
face of each tray is provided with a groove in which an elastic ring may be placed, the
other face of said tray being formed to fit the corresponding groove of next tray;
the feed pipes G are also formed to joint in a similar manner.
The mode of operating our invention is as follows:-
.
After the trays have been pressed together by screw D, the liquid to be filtered is
forced through feed pipes G, into chambers F, when the liquid portion percolates
through the porous compositions C, and escapes through outlet holes H, into trough I,
from whence it may be led to any convenient place.

page_text: At the same time the solid particles contained in the liquid are arrested and
collected together in the spaces F provided for that purpose, and from whence it may
be removed by slacking screw D and separating the trays, the same process being
repeated each time.
"We would also have it clearly understood that we do not confine ourselves to the
exact details hereinbefore mentioned, neither do we bind ourselves to the exact
ingredients of the porous composition, as the same admit of modification to suit
varying circumstances, without departing from the essential features of our
invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The application of a porous composition as a filtering medium for filter
presses.
2. A filter press constructed and operated as herein described and illustrated by
accompanying drawings.
Tad this eth da of T 1007
BILLINGTON & NEWTON,
Agents for Applicants.