COMPLETE SPECIFICATION
Automatic water tank
This invention relates to drawing water up a building or public tank with the least
consumption of electricity. This is a new concept and it does not require a pump
or motor, it uses the atmospheric pressure (which is a renewable resource and
exerts about 1 kgf/cm2 on the surface of the earth) and the suction force of a
vacuum . The tank fills by itself.
The conventional pump and motor is expensive, it consumes a lot of electricity
and makes too much noise, vibration and takes space.
My device uses the atmospheric pressure . It creates a vacuum with the help of an
electrostatic immersion heater suspended into a small trough through the lid of
the tank . The trough contains half or one litre water according to the size of the
tank . When the heater is switched on the little water boils away and high
pressure is created . The air in the tank and water vapour pushed out through
valve A on the upper part of the tank . When the heater reaches a certain
temperature it automatically cuts out and the remaining steam inside the tank
condenses creating low pressure . Valve A becomes air tight under low pressure
and valve B which is below, under the source of water opens inwards under low
pressure and water is drawn up into the trough and tank . The temperature of the
heater falls and it is automatically on again . This process only requires to be
repeated 4 or5 times for the tank to be full . the subsequent pulls draw more
water because the percentage of air decreases and steam increases. When the
tank is full a tap for the inlet of air which can be placed anywhere on the inlet
pipe must be opened for the water to flow down from the outlet. A meter can be
used to indicate the fraction of water in the tank . If the valve A and B do not work
properly . Then valve A can be blocked and valve B can be removed . The system
will work perfectly without the valves only that the air and steam bubbles will
pass through the source of water. It must be noted that the larger the tank the

more would be the more would be the margin of electricity saved so this system
can also be used in large public tanks .
In one form of the invention the valve A is placed at the end of the outlet pipe and
then the system which is made smaller works like a pump (fig. 2).
Brief description of the drawing:
Fig. 1 shows one example of the automatic water tank according to this invention.
Fig.2 shows how this device can be made smaller and used as a pump.
Detailed description of the preferred embodiments:
Referring to fig.l can be seen the automatic water tank .
(No.l)-The automatic water tank .
(No.2)-The electro static immersion heater. Wherein a bimetallic strip is placed at
the end of the immersion rod inside the trough. It disconnects at high
temperature.
(No.3)-The trough. It can be made of any suitable metal. It is hung from the neck
or lid of the tank. It can hold half or 1 litre of water (or as required).
(No.4)-The lid of the tank. It must be airtight. It also has a small cap on top.
(No.5)-lnlet for air. It is opened when the tank is full and water is required to flow
down.
(No.6)-lnlet pipe for water. Water is sucked up from this pipe. It is frocked at the
end for some water to flow into the trough and the rest into the tank.
(No.7)-Outlet for water. Is opened when the tank is full and the inlet for air (No.5)
has been opened.
(No.8)-The source of water. It can be a tank or well.
(No.9)-A meter to indicate the fraction of water in the tank.

. (V-A)-Valve A on the upper part of the tank. It allows air and steam to pass out
but does not allow air to get in. It can also work as an outlet for extra water if
anyone forgets to put off the system.
(V-B)-Valve B is placed under the source of water. It allows the inflow of water
and prevents backflow of water

I claim,
1. A new process for drawing up water. Wherein
An automatic water tank, comprising of an air tank which is strong enough
to suck up water. It can be made up of steel, galvanized iron or even plastic.
2. An electrostatic immersion heater. Wherein
A bimetallic strip is placed which cuts off electricity around a certain temperature.
It is suspended through the lid into the trough.
3. The trough which holds about ½ or1 litre of water or as required. It is
suspended by a metallic strip from the neck or lid of the tank. It can be made of
any suitable metal.
4. The lid of the tank which is airtight when shut. It can be clamped or twisted
tightly. The electrostatic heater passes through it. The trough can also be
suspended from it.
5. An inlet pipe for water which is frocked inside the tank for some water to flow
into the trough and rest into the tank. It also has an inlet for air which can be
opened when the tank is full.
6. Valve A which opens outwards under high pressure and valve B which opens
inwards under low pressure.
7. An automatic water tank substantially as herein described with reference to the
accompanying drawings.

The automatic water tank is a new concept and is useful in drawing water which is
required by every home. It uses minimum electricity as it also uses the
atmospheric pressure (a renewable natural resource). It comprises an airtight
water tank(1),an electrostatic immersion heater(2),a trough(3),an inlet and outlet
pipe(5,6),two valves(A and B),and a metre (7).