Improved Filtering Apparatus for Water Cisterns.
Year: 1894

page_text: Date of Application, 3rd Jan., 1894-Accepted, 17th Feb., 1894
COMPLETE SPECIFICATION.
Improved Filtering Apparatus for Water Cisterns.
I, WILLIAM BARBER PRESS, of 5 Lansdown Villa, High Road, Leytonstone,
Essex, Model Maker, do hereby declare the nature of this invention and in what
manner the same is to be performed to be as follows:-
The object of this my invention is to provide a filter whereby the whole of the
water used for household purposes can be strained and purified, and which
moreover possesses the following advantages:-
It is simple in construction, neat in appearance, cheap to manufacture, requires
no experienced person to fix it, wants no attention, is portable, and is not liable to
get out of order.
I now proceed to describe my invention, reference being had to the accompanying
drawings and to the letters and figures of reference marked thereon.
Fig. 1, is an elevation of my improved filter;
Fig. 2, is a sectional elevation thereof;
Fig. 3, is a plan thereof with the cover removed; and
Fig. 4, is a plan of the underside thereof.
A., represents a metal casting, comprising two annular rings a and b, united by
arms or webs c. B, refers to another annular casting, having flanges d and a
preferably semi-circular annular groove e, adapted to receive a preferably round
section rubber or other flexible and compressible band C. The two castings A, B,
are united by vertically arranged strips of metal D. A. perforated metal or wire
gauze or other permeable cylinder E, is retained between the castings A, B, by
the flanges, thereon. A similar inner cylinder F, is retained between the
castings A, B, by the flanges g. A suitable and preferably heavy lid G is pro-
vided, and is formed with an annular groove h. Any suitable filtering medium,
such as a mixture of gravel and charcoal, is filled into the space contained between
the two cylinders E, F, casting B, webs c, and lid G.
The filter as described, is intended to be placed in a water cistern in such
manner that the projecting end of the outlet pipe enters the opening I in the
lower casting. The flexible band C prevents the water from entering the inner
part of the filter except through the perforations of the cylinders E, F, and the
filtering medium. Inasmuch as the filtering medium will gradually waste away by
reason of the water passing therethrough, the lid G is made sufficiently heavy to
gradually fall and keep the filtering medium tightly compressed.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The herein-described filter for water-cisterns, comprising two annular castings,
one casting having a central aperture, and an annular flexible and compressible
band secured to the under surface thereof; a lid fitted to the other casting; said
castings held apart by suitable stay-pieces; perforated or other permeable
cylinders fitted between the castings; and a filtering medium inserted within
the space contained between the permeable or perforated cylinders, all substan-
tially as and for the purposes hereinbefore set forth, and illustrated in the drawing
hereunto annexed.