Improvements in Filters or Water Purifiers.
Year: 1886

page_text: Improvements in Filters or Water Purifiers.
I, FREDERIC GROSVENOR of Eagle Pottery, Boden Street, Glasgow, Lanarkshire,
Earthenware Manufacturer, 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:-
My invention, which relates to filters for purifying water for domestic and other
use and for filtering wines and other liquids, has for its object, by improving the
formation of the filter, to permit of ready access for cleaning the blocks of
compressed carbon and other material employed as the filtering medium..
In the accompanying drawings figure 1, is a vertical section and figure 2 a plan
of a modification of an improved filter constructed in accordance with my inven-
tion and figure 3 is a vertical section of a modified form of the filter.
Within a containing vessel A of any suitable form and composed of glazed
earthenware or other material I form. at suitable distances apart two or more
ledges a, a, and upon the lower ledge a, I secure by means of cement or other
jointing material a disc B, of earthenware having in it a large central orifice.
whereinto I fit a plug or plate C, of compressed carbon or other filtering medium,
said plug being provided with a knob c by which it may be lifted out of its seat
in the disc B. Over the disc B, I spread a layer D of finely pulverised charcoal or
other filtering medium, and over said layer I place a perforated disc E which serves
to separate the layer D of fine char from an upper layer F, composed of coarser
filtering material reaching up to, or nearly to the upper ledge a¹, within the
vessel A. Upon the upper ledge a¹ I place a disc G of earthenware having cemented
or otherwise fitted in it a plug or plate H of compressed carbon or similar material.
of a coarser variety than that composing the lower plug C. In the disc G
notches g are formed to permit it to pass over locking pieces g¹ formed on the
vessel A, which retain it in place; and the disc G is fitted to rest on the ledge a¹
by its own gravity so that it may be freely removed, a washer of asbestos or
similar packing being if necessary placed between the lower edge of the disc and
the supporting ledge to prevent in a large measure the flow of the water or other
liquid through the joint. In the lower part of the vessel A, is a tap hole T, and
over the top is a lid or cover L which is either loosely fitted or securely jointed
according as the filtration of the liquid is to be effected by gravitation or under
pressure. The water or other liquid to be filtered or purified being filled in at the

page_text: top of the vessel A passes through the porous plug H through the layers or filter
beds F and D and intervening perforated disc E and finally through the porous
plug C into the bottom of the vessel A which it reaches after being thoroughly
purified. When by continued use the filtering material becomes foul the lid L and
upper disc G are lifted out of the vessel A, the upper layer or bed F, is removed,
the perforated disc E taken out, the lower layer or bed D separately removed, and
the plug C withdrawn from the disc B, to give access to the bottom of the
vessel A. Both the sides of the plugs are cleaned; the loose filtering materials
washed, and the several parts of the filter are thereafter replaced.
In the modification illustrated in figure 3 the lower plug C is fitted in the
bottom of an inner vessel A¹ which contains the layers D and F, perforated disc E,
and disc G with porous plug H, and is fitted to rest by a flange on the upper edge
of the vessel A. As access to the lower side of the plug C for cleaning, is obtained
by lifting the vessel A¹ out of the vessel A, this plug is cemented or otherwise
fixed in the bottom of the vessel A¹ instead of being made removable. In other
respects the two filters are similar.
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
1. The combination of parts constituting the improved filter in its different
modifications substantially as herein described with reference to the drawings
annexed.
2. In a filter of the kind herein described a movable filter plate composed of an
earthenware disc having fitted therein a plug or plate of carbon. or other filtering
material substantially as described with reference to the drawings annexed..
Dated this Thirteenth day of February 1886.