AN IMPROVED METHOD FOR FIXING THE PLATES IN THE INTERIOR OF FILTER CASES SO AS TO DO WITHOUT CEMENT
Year: 1884

page_text: CHARLES IRVINE CONYNGHAM BAILEY of the Pottery Fulbam S.W. Stoneware
Potter do hereby declare the nature of my said invention for AN IMPROVED
METHOD FOR FIXING THE PLATES IN THE INTERIOR OF FILTER CASES SO AS TO
DO WITHOUT CEMENT to be as follows:-
By means of plates screwed into the "seatings" fixed in the filter cases I avoid
the necessity for the use of cement or any other material, so that nothing except
glazed stoneware is in contact with the filtering medium & the water. These
screw plates may be either over the filtering medium or under it & may be either
one large screw or several smaller ones to connect the plates to the seatings.

page_text: An Improved Method for Fixing the Plates in the Interior oi
Filter Cases.
I, CHARLES IRVINE CONYNGHAM-BAILEY of the Pottery, Fulham S.W. Stoneware
Potter do hereby declare the nature of my invention for "AN IMPROVED METHOD
FOR FIXING THE PLATES IN THE INTERIOR OF FILTER CASES" and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement :-
This Invention has for its object an improved method for fixing the plates in
the interior of filter cases.
The plates are screwed into seatings fixed in the filter cases or otherwise screws
connect the plates to the seatings: thus I avoid the necessity for the use of cement
so that nothing but glazed stoneware and the filtering medium come into contact
with the water,
In the annexed drawings Figure 1 is a vertical section of a filter constructed in
accordance with my invention.
a is the body of the filter case and b is the lid or cover. In the body a there is
an aperture a¹ to receive the tap by which the filtered water is drawn off and also
another aperture a² which is used in washing out the filter. a³ is an air passage,
b is the cover, it is so arranged as not to obstruct the passage a³. c is a slab of
perforated earthenware it is received into a recessed ledge within the filter body.
An asbestos cloth is laid on the slab c and on this again the bed d of filtering
material is placed.
• J.
.....
Prepared animal charcoal is the filtering medium which I prefer but others may
be used.
Above the filtering bed there is another ledge e within the body of the filter, it
has a large aperture in the centre to receive the plate f. Around the aperture
there is a flange and a screw thread is cut in the flange before the filter body is
burnt. The plate f is of earthenware, it is perforated and has a screw cut around
it corresponding to that in the ledge 6. The plate is also provided with a cross
bar or handle and it has a flange around its upper edge at f³. 9 is the space
within the filter for the unfiltered water and h is the space in which the filtered
water is stored after it has passed through the filtering bed d.
When the filtering bed has been prepared and preased firmly into its place the
plate f is screwed in and it is not again removed until the filtering bed requires
renewal,
Figure 2 is a vertical section of a filter differing somewhat in form from that
shown at Figure 1.
There is here an outer and an inner body A and a; the filtering bed d is intro-
duced from the under. side of the inner body by an aperture which is closed by the
plate. The plate f is provided with a screw as the plate f in Figure 1 from
which it differs only in position and in being of smaller size. c is a perforated
partition in the inner body which takes the place of the slab c in Figure 1 but it

page_text: is above the filtering bed in place of below. Over the plate fan asbestos cloth is
placed to provent the escape of the prepared charcoal or other filtering medium.
Figure 3 is a vertical section showing a filter of another form.
In this case the body a has a partition at in which is an aperture with a flango
and internal screw thread. The plate f has a central boss with a thread upon it
which screws into the aperture. A cork washer may be interposed between the
parts. The plate of forms the bottom of a cylindrical vessel F in which the filtering
medium is packed. There is also an interior cylinder F which is perforated at
the upper part. A cover plate G closes the cylinder F at the upper part; it
screws into its place and a packing ring of india rubber may be inserted beneath it.
The space between the walls of the cylinders F and F¹ may be filled with
prepared animal charcoal whilst the interior of the vessel F is filled with fine
filtering sand. As before asbestos cloth is employed to prevent the filtering media
from passing out through the perforations of the plate on which they are
supported.
The unfiltered water in this case ascends by the perforations around the periphery
of the plate f-finds its way amongst the filtering media to the perforations at the
upper part of the inner cylinder F which it enters by those perforations and it
then descends through the medium in the cylinder F' and escapes into the filtered
water storage chamber by the central perforations of the plate f.
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
Fixing plates of glazed stoneware in the interior of glazed stoneware filter cases
by means of screws subatantially as described.
4004