A Water Flushing Cistern.
Year: 1895

page_text: Date of Application, 28th Oct., 1895
Complete Specification Left, 28th July, 1896-Accepted, 29th Aug., 1896
A Water Flushing Cistern.
I, JOHN CHARLES JOHNSON, Engineer of 44 Compton Road Canonbury,.
London in the County of Middlesex do hereby declare the nature of this invention
to be as follows:-
:-
My cistern consists of an air-tight chamber of cast iron or other suitable
material having only one opening which is on the top, through which a short piece
of pipe is screwed and reaching nearly to the bottom.
Attached to this pipe on the outside is a valve or tap which is; what is usually
termed a (two way valve or tap) and connected to this are two pipes, one of
which is the same size as that in the cistern and is used for the flushing or
discharge pipe, and the other which is smaller is used as the water supply to the
cistern.
The arrangement of the valve or tap is such that when the water is passing into
the cistern; the discharge or flushing pipe is shut off; and when the discharge or
flushing pipe is on; the water supply to the cistern is shut off.
The action of the cistern is this; when the water from the main service passes
into the cistern through the pipe which passes nearly to the bottom, it compresses
the air enclosed until it reaches the pressure of the water behind it and it remains
so until the valve or tap is turned to discharge and then the water is forced by the
compressed air enclosed, up the same pipe that it entered the cistern, with con-
siderable force through the discharge or flushing pipe until the cistern is empty,
and thus you have only to turn the valve or tap back again to repeat the
operation.
Dated this 26th day of October 1895.
A water FLES
I, JOHN CHARLES JOHNSON of 44, Compton Road, Canonbury, in the County
of Middlesex, 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 :—
This invention relates to an improved water flushing cistern and it consists
essentially of an air tight chamber having a single opening controlled by a two-way
valve or tap to which are connected two pipes the inlet pipe from the main source
of supply of water and the discharge or flushing pipe.
In the accompanying drawing which shows-by way of illustration-one form
my invention may assume:-
Figure 1 is a view in vertical section showing the two-way valve or tap in position
for filling the cistern.
Figure 2 is a similar view-broken-showing the two-way valve or tap in
position for discharging or flushing, and Figure 3 is a view in plan.
Throughout the views similar parts are marked with like letters of reference.
Priced 1

page_text: Referring to the drawing A designates the air tight chamber and C the two-way
valve or tap, the passage c of which is so arranged that it can put the interior of
the cistern A either into communication with the inlet orifice F or the outlet
orifice E.
When the two-way valve or tap is located on the top of the chamber A. a pipe
such as B is used to connect the said valve or tap with the bottom of the chamber
as shown by Figure 1, but when the valve or tap is attached to the bottom of
the chamber as shown in dotted lines in Figure 1 this pipe may be dispensed
with.
The arrangement of the two-way valve or tap is such that when the water has
passed into the cistern the discharge or flushing pipe is shut off as shown by
Figure 1, and when the discharge or flushing pipe is open the water supply to the
cistern is shut off as shown by Figure 2.
The action of the apparatus is as follows:-
When the water from the main or other source of supply passes into the
cistern A it compresses the air therein until its pressure equals the pressure of the
water acting on it, when of course the water ceases to flow into the cistern. In
this state it remains until the valve or tap is turned to discharge the water when
the water is forced out through the said valve or tap by the compressed air in the
chamber with considerable force. To fill the flushing cistern again all that is
required is to reverse the two-way valve or tap.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1) The improved water flushing cistern substantially as hereinbefore described
and illustrated by the accompanying drawing.
(2) In a water flushing cistern, the combination of an air tight chamber and of a
two-way valve or tap located near the bottom or lower end of the said cistern, as
and for the purpose set forth.
(3) In a water flushing cistern, the combination with an air-tight chamber of a 3
two-way valve or tap located at or near the top or upper end of the said cistern
and of a pipe extending from the two-way valve or tap within the chamber to
within a short distance of the bottom thereof, as and for the purpose set forth.
Dated this 28th day of July 1898.
ay
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
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