Year: 1887

page_text: Date of Application, 23rd May, 1887
Complete Left, 23rd Feb., 1888
Complete Accepted, 23rd Mar., 1888
FREDERICK BARKER HILL 26 London Road S.E. Engineer. I, do hereby declare
the nature of this invention to be as follows :-
My invention consists of a perfect flushing syphon of positive and automatic action
and admitting of the use of a trapping arrangement of any depth thus forming a
perfect seal against obnoxious gases.
A syphon (preferably annular) is constructed having on the internal tube a lip
which when raised will not allow the fluid to pass the connection between the internal
tube and the lip is made either with a flexable meterial or to work in an annular recess
containing mercury.
A float is preferably attached to the outer casing of the syphon for the purpose of
actuating the lip. In this case the float is open at the top and its rise is limited it is
also provided with syphons or an annular syphon for the purpose of filling and
emptying it.
The action is as follows the fluid rising in the receptical that contains the flusher
acts on the float and raises it to its limit and at the same time raising the moveable
lip on the internal tube the fluid on continuing to rise fills the float which immediateley
sinks carrying with it the moveable lip thus shortening the internal tube and leaving
a head of fluid above the opening sufficient to over come any required depth of
trapping and causing the syphon to start.
When the height of fluid in the receptical falls below the float the float syphons or
annular syphon empties the float thus restoring its buoyancy.

page_text: A modification for obtaining the required head of fluid over the internal tube is as
follows.
A float in combination with outer casing is mechanically controlled until the fluid
in the receptical raises to the required head the float and outer casing are auto-
maticalley released and rise thus reducing the air pressure in internal tube and allowing
the fluid to rise in annular space of syphon above opening of internal tube thus
starting the action of syphon.
For waste water preventers the lip of flexable meterial or a lip working in an
annular recess containing mercury which is made to work automatically or not.

page_text: COMPLETE SPECIFICATION.
Improvements in Syphon Flushers, also Applicable to Waste Water
Preventors.
FREDERICK BARKER HILL 26 London Road Southwark S.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:-
My invention consists of a perfect flushing syphon of positive and automatic action'
and admitting of the use of a trapping arrangement of any depth, thus forming a
perfect seal against obnoxious gases.
My invention is illustrated in the accompanying drawings in which figures 1 to 8
show sections of syphons, with automatic starting arrangement attached.
In each figure like letters indicate corresponding parts.
Figure 1. A is the cover, B the central tube leading to a trap on the top of which
is a mercury trough C.
Attached to the inside of the cover A is an annular lip D, and to the outside of
cover A is a float E of sufficient buoyancy to overcome the combined weight.
Inside of the float E is a syphon F preferably annular.
The action is as follows:-On the liquid in the flushing tank reaching the float E
which is attached to the cover A, both are raised by the buoyancy of the float E until
the desired height is obtained, which may be limited by any convenient stop. On the
upward motion of the cover A being arrested by the aforesaid stop, the liquid continues
to flow into the syphon tank until it reaches the top of the annular lip D, and at the
same time flows into the float E, thus causing it to sink, carrying downward the
annular lip D, thus shortening the centre tube of syphon B, and allowing the liquid
to flow over its top, and so starting the action of the syphon.
Figure 2, is a modification of figure 1, in which the top of the cover A is only
raised, and is kept air-tight by the mercury seal G. The action of the combined
parts of this figure, is similar to the action of those of fig. 1.
Figure 3. In figure 3, B is the centre tube, and A the cover which in this case is
not moved. To the top of the cover A is attached an air pipe H having attached to
its top a mercury seal I. K is an annular plunger which is raised and lowered by
the annular float L.
The action of figure 3 is as follows:-The plunger K being raised by the float L,
releases the compressed air due to the trap, thus causing the syphon to start.
Figure 4. A more sensitive action is given to the plunger K as follows:-The
annular float E is raised by the liquid to its limit. On the liquid continuing to flow
into the tank the float E suddenly sinks, thus giving a rapid motion to the float L and
the plunger K and releasing the compressed air in the centre tube B, thus starting
the syphon.
Figure 5. In figure 5 the float E is attached to the cover A, and its action in
releasing the compressed air in centre tube B is similar to that of figure 4.

page_text: Figure 6. M is a permanent or electric magnet attached to the top of tank, or
other suitable place. The action is as follows: the liquid raises the float L and the
plunger K until they come under the influence of the magnet M, which holds them
suspended sufficiently long to release the air in the tube B, and start the syphon; On
the action of syphon commencing, the down pull due to suction is sufficiently great to
overcome the action of the magnet, and thus release the plunger K and float L.
Figure 7. In figure 7, the action is as follows:-On the cover A being raised by
the float E, the air space on the top of inner tube B is, owing to the large outer
diameter of B, greatly increased, thus allowing the liquid to flow over the top of
tube B, and start the syphon.
Figure 8 is a modification of figure 7.
I may if desired provide either of the above described forms of my apparatus for
the purpose of waste water preventors either to work automatically or by lever moved
by hand.
Having thus fully described my said invention and the manner of performing the
same I wish it understood that I claim
A mercury recess or flexible lip for controlling the pressure of air due to the head
of water in the trap used, in combination with the float and annular syphon for the
purpose specified, either together or separately.
Dated this 23rd day of Fabr1000