An Improved Cistern or Tank for Water Storage.
Year: 1898

page_text: Date of Application, 5th Nov., 1898
Complete Specification Left, 31st July, 1899-Accepted, 2nd Sept.,
1899
PROVISIONAL SPECIFICATION.
An Improved Cistern or Tank for Water Storage.
I, JouN DOWNTON, of 71, West India Dock Road, London, E., Engineer, do
hereby declare the nature of this invention to be as follows:-
The object of the present invention is to provide a cistern or tank for the stor-
age of water in buildings and the like, so constructed and arranged as to entirely
prevent the collection or accumulation of dirt or sediment which is always found
in the ordinary cistern. My improved cistern or tank can be used with or with-
out the usual ball valve.
According to my invention, the improved cistern or tank consists of a per-
manently closed vessel the bottom of which slopes downwards towards the outlet
aperture, or has the shape of an inverted cone with the outlet at the apex. Near
the top of the cistern is the water inlet and in the cover I provide an air valve
which by means of a float is closed automatically so soon as the water contained
within the cistern has reached the desired level. This valve being closed the
air pressure within the cistern will resist the further entrance of water thus
rendering the employment of the ordinary ball valve on the inlet pipe unnecessary.
The cistern or tank being permanently closed no foreign matters or impurities
can gain admittance except those held in suspension by the entering water, and
these cannot accumulate by reason of the sloping or conical shape of the bottom
of the cistern.
I, JOHN DOWNTON, of 71, West India Dock Road, London, E., Engineer, 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:-
1
Cisterns or tanks at present employed for water storage in buildings and the
like usually consist of flat bottomed vessels, open at the top, or merely covered
by some loosely fitting removable lid, the result being that dirt and impurities
freely gain admittance, and sinking to the bottom accumulate there.
Now the object of the present invention is to so construct and arrange these
cisterns or tanks as to entirely prevent the entrance of any dirt, foreign matters
Pine R71

page_text: or impurities except such as may be held in suspension in the entering water, and
further to prevent the accumulation as sediment of the latter. My improved cis-
tern or tank may also be used either with or without the ordinary ball valve on
the inlet pipe.
I will now fully describe my invention and the manner of performing the
same having reference to the annexed drawing which shews in elevation a stor-
age cistern or tank constructed in accordance with my invention.
The improved cistern or tank consists of a permanently and hermetically closed
vessel a near the top of which is the water inlet . The bottom c of this vessel
slopes steeply in all directions towards the entrance of the outlet pipe d, or has
the shape of an inverted cone with the outlet aperture at the apex. In the cover
of the cistern I provide an air valve e which by means of the float f is closed
automatically so soon as the water in the cistern has reached a predetermined
level. The valve e having been closed, the pressure of the air confined within
the cistern will resist the further influx of water, thus rendering the employ-
ment of a ball valve on the inlet pipe unnecessary.
Should it be preferred to use a ball valve on the inlet pipe b then the air valve
and float may be dispensed with and a simple air vent substituted therefor. The
cistern or tank being permanently closed, no dirt, foreign matters or impurities,
can gain admittance at any time save such as may be held in suspension in the
inflowing water, and these latter cannot accumulate by reason of the steeply
sloping or conical shape of the bottom.
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. A storage cistern or tank consisting of a permanently closed vessel with
water inlet, the bottom of which slopes steeply downwards towards the outlet
aperture, combined with a float operated air valve, substantially as described and
for the purpose set forth.
2. In a permanently closed storage cistern or tank, the employment in sub-
stitution for a ball cock on the inlet pipe, of an air valve closed by means of a
float when the water has reached a predetermined level, substantially
the purpose set forth.
as and for
3. A storage cistern or tank consisting of a permanently closed vessel the
bottom of which has the form of an inverted cone, combined with an inlet pipe
furnished with a ball cock, an air vent, and an outlet pipe leading from the apex
of said conical bottom, substantially as described.
T
L 1 1
01
1
e
1000
U1113
E. P. ALEXANDER & SON,
Chartered Patent Agents,
19, Southampton Buildings, Chancery Lane, London, W.C., Agents.
4