Improvements in Flushing Valves.
Year: 1892

page_text: Date of Application, 1st Apr., 1892-Accepted, 7th May, 1892
ענגען VVI
Improvements in Flushing Valves.
I SAMUEL HENRY ADAMS, Sanitary Engineer of 10 Little Queen Street
Westminster London S. W. do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My invention consists in improvements in flushing valves. Whereas in my
former Patents No. 727 '81 and 7487 '86, I adopted a syphon which should bring
the liquid in flushing chamber above its head, and in discharging, as the
chamber emptied, draw the liquid upwards over the syphon bend or lip to pass
downwards through its longer limb and thus away through its outlet, my present
improvement is designed to act as a valve where having brought the liquid above
its head upon starting action the liquid simply passes through the valve downwards
instead of having first to rise as in a syphon by a created vacuum. By this
arrangement I overcome the friction necessarily accompanying the passage of
liquid through a syphon and I obtain a result which is difficult of attainment
where valves of the usual kind are considered, and whereas in a syphon the cap
or dome is used as a means of drawing the liquid upwards, subsequently to return
down the longer limb of syphon in my present improvement I use a cap or dome
so short that it merely prevents the escape of air from the interior of valve itself-
the air being necessary to give me the required head of water as shewn on my
drawings and herein described. On reference to these drawings the different
figures of which are lettered to correspond A. being a vent pipe or tube communi-
cating with the interior of valve. B valve cap, or dome. C discharge outlet.
C' body of valve. D water seal.
Fig. 1. shews my valve with vent-pipe A attached to its side, it will be seen
that this pipe is placed at such a height that it is covered by the liquid in main
seal D this being an essential to the working of my apparatus, in some cases I
turn up the lower end of the vent pipe A. and I place it at such a height that it
may be above the line D¹.
Fig. 2 shews a somewhat similar arrangement, but the pipe A is within the valve
being brought through the cap or dome it has also an enlargement in the vent
pipe A at or near the top water level of seal, to aid the air exit by reducing the
column of liquid in the vent pipe.
Fig. 3 shews the apparatus but in this case the vent pipe A is fitted with an
escape cock or tap or other similar arrangement.
Fig. 4 shews the valve in a slightly altered form, the trap and outlet being
cylinderical or annular, the principle remaining the same. The action of my valve
is as follows. The trap D is full of liquid, pipe A is also sealed, the dome or
cap B confines the air within the body of the valve and the air pressure resists
the weight of liquid in the chamber and prevents its passage through my valve.
At a given height the air pressure is overcome by the excessive water pressure
due to its height above my valve with the result that the confined air drives out
the liquid contents of the pipe A and at once the body of liquid in the chamber is
discharged through the valve.
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.
1st. The use of the pipe A communicating with the water seal of a valve and
placed so that it is charged with liquid from the said seal, in combination with the

page_text: dome or cap of valve and the body and deep seal of valve, the pipe A being used
as an air exit.
2nd. The use of a vent pipe A as an air exit having an enlargement or bulb as
shewn at Fig. 2, in combination with a valve body, water seal and dome or cap.
3rd. The use of a vent-pipe for the purpose of an air exit for setting up the
action of a valve the said pipe at its exit end being brought upwards above the
level of the cap or dome of valve and at its lower end being sealed by liquid.
4th. The use of such a vent pipe as an air exit whether placed within or outside
a flushing tank in combination with my present valve or any syphon having a water
seal at its lower limb.
5th. The general arrangement of the appliances and their parts as shewn by my
drawings and herein described or their equivalent though differing in conformity
substantially as and for the same purposes as herein described.
1st April 1892.
SAMUEL HENRY ADAMS.