An Improved Cistern for Drinking Water.
Year: 1896

page_text: Date of Application, 6th Mar., 1896-Accepted, 2nd May, 1896
COMPLETE SPECIFICATION.
An Improved Cistern for Drinking Water.
I, THOMAS DURRANS, of Cornwall Terrace, London, Architect, do hereby
declare the nature of the said 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 relates to an improved or self-cleansing cistern for drinking water,
the same being constructed or adapted with the several features hereinafter
described in combination, the same serving to ensure the cleansing of the sides of
the cistern and the washing away from the sides and bottom and out of the cistern
of all matter and sediment, and to prevent access of foul air to the contained water,
and to supply clean uncontaminated water for drinking purposes and other purposes
for which it may be required.
The improved cistern is illustrated on the accompanying drawing in sectional
elevation, and is preferably constructed of galvanized iron. It is formed as a
container a, circular in cross section and of an inverted conical shape, the sides b,
being inclined inwards, and the bottom c, being domed, such formation serving to
cause the fall of water within the cistern to cleanse the sides and bottom and to
wash any sediment to an outlet d, situated centrally of the bottom, and which is
fitted with a clear way emptying valve e, fitted at any convenient part to a waste-
pipe. The container is also fitted with a ball-valve g, and with a circular
perforated copper flushing pipe h, which is so arranged as to serve to flush the
inner side of the container, so that, when the valve e, is opened, all dirt or sediment
will be completely washed out of the cistern by the downward rush of the water.
The container is also fitted with a galvanized iron cover i, which is bolted down to
the flanged top edge of the container as represented and serves to prevent access of
foul air to the contained water. The cistern is also fitted with a union j, and
pipe k, serving to supply clean uncontaminated water from the body of the cistern,
and also with a union 1, for the overflow and which may conveniently discharge
into the waste-pipe f, which may deliver over any convenient gully, sink, bath or
into a domestic cistern supplying the sanitary fittings.
The container is mounted on an iron frame or stand m, which may stand within
a safe, and is so formed, as represented, as to permit of easy access to the
valve e.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A self cleansing cistern for drinking water constructed or adapted with the
several features above described in combination, namely;-the container a, shaped
as described; the flushing pipe h, operating as described; the outlet valve e,
operating as described; the cover i; the pipe k; the overflow ; and the frame m,
the whole co-operating in manner aforesaid.
Dated this 5th day of March 1906
DAY, DAVIES & HUNT,
Chartered Patent Agents,
321, High Holborn, London, W.C., Agents for the Applicant.