Improvements in Water Filters.
Year: 1892

page_text: Date of Application, 9th May, 1892
Complete Specification Left, 8th Feb., 1893-Accepted, 8th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Water Filters.
I, TOM MO KAY of 7 Old Post Office Court Carlisle in the County of Cumber-
land Stone Merchant do hereby declare the nature of this invention to be as
follows:-
This invention has for its object improvements in water filters.
The exterior or case of the improved filter may be of earthenware, of cylindrical
form closed at the bottom and open at the top and divided into two compartments,
an upper and a lower, by a transverse perforated partition.
This exterior or case receives into the upper compartment a bowl shaped vessel
made in one piece of natural porous stone turned in a lathe and having a flange by
which it rests on the top of the cylindrical sides of the casing. The bowl receives
the water to be filtered and it is provided with a cover. The water passes through
the bowl, runs down its sides and curved bottom to a point or apex at the centre
of the bottom from which the water drops. The water so falling is received on
to a layer of carbon or spongey iron supported upon the perforated partition which
separates the upper compartment of the filter from the lower. The lower com-
partment is provided with a tap by which the filtered water, when it has passed
through the layer of carbon or spongey iron, may be drawn off.
The porous bowl is thoroughly smooth and plain inside and outside and is there-
fore easily cleaned out and it does not present any obstructing angles or corners
either on the sides or bottom wherein dirt may accumulate. It does not rest upon
the carbon or spongey iron or plate at the bottom but is suspended. In consequence
the filtration can take place by any part of the bowl whilst the water so filtered
runs down the sides and is all delivered at the same point upon the carbon or
spongey iron. The perforated partition is readily removeable which facilitates
cleaning and the renewal of the filtering material thereon.
Dated this 7th day of May 1892
COMPLETE SPECIFICATION.
Improvements in Water Filters.
I, TOM MCKAY of 7 Old Post Office Court, Carlisle, in the County of Cumber-
land, Stone Merchant, 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 :—
This invention has for its object improvements in water filters.
The exterior or case of the improved filter may be of earthenware of cylindrical
form closed at the bottom and open at the top and divided into two compartments,
an upper and a lower, by a transverse perforated partition.
This exterior or case receives into the upper compartment a bowl shaped vessel
made in one piece of natural porous stone turned in a lathe and having a flange by
which it rests on the top of the cylindrical sides of the casing. The bowl receives
the water to be filtered and it is provided with a cover. The water passes through
the bowl, runs down its sides and curved bottom to a point or apex at the centre
of the bottom from which the water drops. The water so falling is received on to
a layer of carbon or spongy iron supported upon the perforated partition which
separates the upper compartment of the filter from the lower. The lower.com-
partment is provided with a tap by which the filtered water, when it has passed
through the layer of carbon or spongy iron, may be drawn off.

page_text: ee is the carbon or spongy iron.
is the plate or perforated partition on which the carbon or spongy iron rests
and through which the water passes after filtering through the porous stone
vessel a.
g is the outer case of the filter made in the ordinary form and fitted about half
way up with a ledge round the inside on which the plate frests.
The plate is fitted with knobs at the sides so that it can be easily removed
for cleaning or renewing the carbon or spongy iron. The plate f is well dished
so that a thick bed of carbon can be placed therein. The holes in the plate f
are only in that part of the plate covered by the carbon or spongy iron hence all
the water dripping from the point d must of necessity filter through the carbon or
spongy iron. This is further made secure by the fact that the point or apex d
from which the water drops from the vessel a is directly over the centre of the
carbon or spongy iron.
Round the rim of the filter case where the bowl a rests upon or is supported by
the outer case of the filter is a band of tin or zinc to prevent the stone flange or
ledge wearing away or breaking off.
As the unfiltered water must first pass through the porous bowl a and afterwards
through the carbon or spongy iron e e and the plate f, the larger impurities are
kept hack within the bowl so that the carbon or spongy iron does not so soon
and it lasts much longer than it otherwise would. Moreover by
become chokede vessel a in one piece out of a block of porous stone and of a
the making of
bowl like shape it can be easily and thoroughly cleaned there being no corners in
which dirt or disease generating matter can collect the surface of the bowl being
smooth. There is moreover no cement or other article of a like description liable
to crack or break or render the water impure.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that I do not
limit myself to the precise details and configuration of the parts I have described
and shewn as the same may be varied or modified without departing from the
nature of my said invention but what I claim is:-
&
1. The improved water filter consisting of an outer vessel or case containing
bowl of porous stone and a perforated partition beneath the bowl supporting carbon
or spongy iron or like purifying matter; the whole so arranged that the water
percolates through the bowl and drips freely from the rounded bottom thereof on
to the carbon or spongy iron or like material through which it filters into the
receiving compartment below.
2. The improved water filter substantially as described consisting of the outer
vessel or case y, the porous bowl a, the perforated partition f, the carbon or spongy

page_text: iron or like purifying matter e supported on the perforated partition at a distance
beneath the bowl a and the receptacle for filtered water b.
3. The combination of parts consisting of the vessel g, the concave perforated
metal plate supported within the vessel on an inwardly projecting flange, the
layer of charcoal or other filtering material e lying on the plate f, and a bowl a of
filtering stone round at the bottom and provided with a nipple d at the lowest part,
the said bowl being supported by the vessel g, above the perforated plate f so that
the water drips from the nipple d on to the layer e where it lies thickest upon the
plate.