IMPROVEMENTS IN CISTERNS OR TANKS be
Year: 1884

page_text: I ROBERT PRINGLE of 2 Aberdeen Terrace Blackheath, Doctor of Medicine
(Edinburgh University) and Surgeon Major H. M' Bengal Army, do hereby declare
the nature of the said invention for "IMPROVEMENTS IN CISTERNS OR TANKS
be as follows:-
"
to
My Invention relates first to the water supply of household water cisterns, and
it has for its object to ensure that the water drawn off therefrom shall come as
direct from the main as possible without, as under existing arrangements,
necessarily stagnating for a longer or shorter time in the cistern; and it relates
secondly to means of readily cleaning out any sediment that may become deposited
in the cistern,
According to my Invention the service pipe terminates within the cistern at a
short distance above the bottom and has its discharge orifice directed upwards, in
order that the rush of the incoming water shall not disturb the sediment which
may become deposited on the bottom of the cistern, and is provided with a ball
cock or valve. The outlet pipe by which the contents of the cistern are drawn off
has its orifice an.inch or so above the level of the orifice of the service pipe, so that
with a constant supply service, the layer of fresh water last supplied from the main
shall pass as nearly directly as possible to the outlet.
The bottom of the cistern is constructed of concave or troughed form or with
channels leading down to a special outlet furnished with a mud cock at which the
sediment accumulated on the bottom of the tank may be swept out whenever
required.

page_text: "
I ROBERT PRINGLE of 2 Aberdeen Terrace, Blackheath, Doctor of Medicine,
(Edinburgh University) and Surgeon Major H. Ms Bengal Army, do hereby declare
the nature of the said invention for "IMPROVEMENTS IN CISTERNS OR TANKS and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
My Invention relates to the water supply of household water cisterns particularly
those containing water for drinking purposes and tanks for storing water and it
has for its object to ensure that the water drawn off therefrom shall come as direct
from the main as possible without, as under existing arrangements necessarily
stagnating for a longer or shorter time in the cistern and it relates also to means
of readily cleaning out any sediment that may become deposited in the cistern.
Reference is to be had to the accompanying drawing forming part of this
specification which shows a perspective view of a cistern or tank (partly broken
away to show the interior) and to the letters marked thereon that is to say:-
According to my Invention the service or supply pipe a from the main terminates
within the cistern at a short distance above the bottom and has its discharge
orifice b directed upwards in order that the rush of the incoming water shall not
disturb the sediment which may become deposited on the bottom of the cistern.
c is a shield or concave spreader fixed with its concavity downwards a few
inches above the discharge orifice b of the service pipe (to which said shield may
be attached by legs as shown) in order to prevent the jet of water being projected
out of the cistern and to cause it to be diffused in all directions with as little
disturbance of the "tranquil bed " as possible. The usual ball cock or valve d is
provided on the service pipe which for this purpose and for the purpose of the
upwardly discharged jet is conveniently carried down inside the cistern and turned
up at the end as shown.
The outlet pipe or cock e by which the contents of the cistern are drawn off is
connected to the cistern at a point an inch or so above the level of the orifice b of
the service pipe so that either with a constant or intermittent supply service, the
layer of fresh water last supplied from the main shall pass as nearly directly as
possible to the outlet.
The cistern is provided with usual and proper overflow pipes ƒ and g in the
bottom and side by which means the impurities floating on the surface of the water
are carried away.
The bottom of the cistern is constructed of slightly concave or troughed form or
with channels leading down to a special outlet pipe h furnished with a mudcock at
which the sediment accumulated on the bottom of the tank or "tranquil bed" may
be swept out when required, the ball-cock lever being provided with means for
raising it to shut off the supply and to prevent waste previous to clearing the
cistern or tank.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
The combination in a household water cistern or tank for storing water, of an
upwardly directed supply pipe provided with a shield or spreader and a draw off
outlet at or above the level of the supply orifice substantially as shown and
described for the purposes specified.