A Improvements in and Connected with Sewer or Drain Flushing Tanks.
Year: 1888

page_text: Date of Application, 23rd Oct., 1888
Complete Specification Left, 23rd July, 1889-Accepted, 24th Aug., 1889
A
Improvements in and Connected with Sewer or Drain Flushing
Tanks.
I, ISAAC SHONE, of Great George Street Chambers, Parliament Square, London S. W.,
Civil and Mining Engineer, do hereby declare the nature of my said invention to
be as follows :-
This invention has mainly reference to the flushing of sewers of sewerage systems
of towns and other places by means of flushing tanks placed above and in connection
with the sewers at various points, the object of the flushing being to remove from
the sewer the solid matters deposited therein or upon the sides thereof. The type of
flushing tanks to which my invention chiefly relates are those from which the sewage
is discharged by and through a syphon.
According to this invention there is used and combined with a sewer flushing
tank a pneumatically operated apparatus by which the tank is caused to be
discharged.
The type of pneumatic apparatus which is very suitable for the herein described
purposes, is the apparatus used in connection with the system of sewerage known to
sanitary engineers and others, as the "Shone Pneumatic Sewerage System" by
which sewage
is first collected and then raised by compressed air. In these
apparatus which are termed ejectors- the sewage flows into a receptacle and when
such receptacle is filled to the required height, compressed air is automatically
admitted to the receptacle and the contents are thereby discharged or ejected. The
tanks when constructed and operating according to this invention may either be
arranged to operate with water, sewage, or both, or other liquid.
According to one arrangement I use an ejector to fill a flushing tank. This ejector
collects liquid from any suitable source and when full forces it into the tank. By
this filling, the tank, by the discharge into it intermittently of considerable volumes
of liquid, the level of the liquid will, when the height of the liquid in it has become
level or nearly level with the bend of its syphon discharge pipe, by one discharge of
the contents of the ejector into it, be raised to such an extent that such syphon will
be fully charged and will
go full bore.
According to another arrangement the same end may be obtained by employing
an ejector to charge the syphon as soon as the level of the liquid in the tank has
reached that of the bend of the syphon. In this case the intake of the ejector would
be connected to the tank and it would be filled simultaneously therewith, or nearly
so, and the automatic actuating gear of the ejector would be set to cause the compressed
air to enter it and discharge it as soon as the desired level above stated is reached.
The tank in this case may be filled by liquid supplied to it by gravity or other
suitable means.
In all arrangements of my invention suitable valves and other necessary details
would be provided; and various modifications of arrangements, constructions and
combinations of parts, and modes of operating, may be made without departing from
my invention.
Dated this 22nd day of October 1888

page_text: COMPLETE SPECIFICATION.
Improvements in and Connected with Sewer or Drain Flushing
Tanks.
'I, ISAAC SHONE, of Great George Street Chambers, Parliament square, London S. W.,
Civil and Mining Engineer, do hereby declare the nature of my said 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 has mainly reference to the flushing of sewers of sewerage systems
of towns and other places by means of flushing tanks placed above and in connection
with the sewers at various points, the object of the flushing being to remove from the
sewer the solid matters deposited therein or upon the sides thereof. The type of
flushing tanks to which my Invention chiefly relates are those from which the sewage
is discharged by and through a syphon.
According to this Invention there is used and combined with a sewer flushing tank
a pneumatic or equivalently operated apparatus by which the tank is caused to be
discharged.
"
The type of pneumatic apparatus which is very suitable for the herein described
purposes, is the apparatus used in connection with the system of sewerage known to
sanitary engineers and others as the "Shone Hydro-Pneumatic Sewerage System'
by which sewage is first collected and then raised by compressed air. In these
apparatus which are termed ejectors-the sewage flows into a receptacle and when
such receptacle is filled to the required height, compressed air is automatically
admitted to the receptacle and the contents are thereby discharged or ejected.
The tanks when constructed and operating according to this Invention may either
be arranged to operate with water, sewage, (or both) or other liquid.
According to one arrangement I use an ejector to fill a flushing tank. This ejector
collects liquid from any suitable source and when full forces it into the tank. By
thus filling the tank by the discharge into it, intermittently, of considerable volumes of
liquid, the level of the liquid will, when the height of the liquid in it bas become
level or nearly level with the bend of its syphon discharge pipe, by one discharge of
the contents of the ejector into it, be raised to such an extent that such syphon will be
fully charged and will go full bore.
According to another arrangement the same end may be obtained by employing an
ejector to charge the syphon as soon as the level of the liquid in the tank has reached
that of the bend of the syphon. In this case the intake of the ejector would be
connected to the tank and it would be filled simultaneously therewith, or nearly so,
and the automatic actuating gear of the ejector would be set to cause the compressed
air to enter it and discharge it as soon as the desired level above stated is reached.
The tank in this case may be filled by liquid supplied to it by gravity or other
suitable means.
In all arrangements of my Invention suitable valves and other necessary details
would be provided; and various modifications of arrangements, constructions and
combinations of parts, and modes of operating, may be made without departing from
my Invention.
Having thus specified generally the nature, object and effects of my invention, its
description will now be proceeded with in reference to the annexed sheets of drawings,
which make a part of this specification, by way of explaining more fully the said
nature, objects and effects. The drawings and the description of them set forth
together examples of my Invention, the said drawings being marked with figures
and letters of reference corresponding with the following explanation and like
letters and figures being used to denote the same or corresponding parts throughout
the drawings.
DESCRIPTION OF THE DRAWINGS.

page_text: Figure 2 is a sectional elevation, on an enlarged scale, of the syphonic flush tank
shewn at Figure 1.
Figure 3 is a sectional elevation of a syphonic flush tank provided with a pneumatic
ejector to start the syphon.
Figure 4 is a sectional elevation of a syphonic flush tank provided with a tumbling
vessel to start the syphon, and with means for pneumatically starting the syphon by
admitting compressed air into the flush tank.
With reference to Figures 1 and 2; A is a station provided with hydro-pneumatic
ejectors a working upon what is known to sanitary engineers and others as "The
Shone Hydro-Pneumatic Sewerage System"; a¹ is the gravitating sewer feeding
the ejectors a; a is a rising sewage delivery main which receives the sewage from
the ejectors a and discharges the sewage into the syphonic flush tank b which unay
be any distance away from the ejector station an: which is used for flushing a large
gravitating sewer c that would not otherwise be self-cleansing. The ejectors a charge
the flush tank b, by their intermittent discharges, with liquid or sewage collected from
any suitable source. The last discharge of the ejectors a when the flush tank b is
full (or the height of the liquid in it has become level or nearly level with the bend.
of its syphon discharge pipe d) will suddenly raise the contents of the, flush tank b
to such an extent as to fully charge and start the syphon d, which is thereby caused
to go full bore and discharge the contents of the flush tank into the gravitating
sewer c. This means of charging the flush tank and starting the syphon insures the
correct working of the syphon and prevents the dribbling of the contents of the flush
tanks over the bend of the syphon.
With reference to Figure 3, the same end-that is to say, the correct working of
the syphon d of the flush tank b, may be obtained, according to my Invention, by
providing an ejector a of the type known as the "Shone Hydro-Pneumatic 'Sewage
ejector between the flush tank and the syphon d. The flush tank is supplied
with liquid or sewage by the pipe a² from any suitable source and as the tank b fills,
the liquid flows through the pipe and into the ejector a and fills the ejector a
simultaneously with the filling of the tank b. In the pipe between the flush tank b
and the ejector a there is provided a non return valve 62, and the ejector a is provided
with the usual float device e and compressed air inlet valve h. As soon as the
ejector a is filled, the float device e turns on the compressed air supply, through the
valve h, which then discharges the contents of the ejector a into the syphon d. said
contents being prevented from returning to the tank b by reason of the intervening
valve . The discharge of the ejector a starts the syphon full bore and thereby
causes the syphon to discharge the contents of the tank b.
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With reference to the examples of my Invention shewn at Figure 4, it will be seen
that there is provided between the flush tank b and the syphon d, a stand pipe.k.
This stand pipe & has an enlarged head k¹ and a tumbling vessel i, and there is also
provided a ball or float valve l, to prevent liquid rising up the stand pipe, and a valve
to prevent liquid flowing from the stand pipe into the tank b. At its other end the
tank is provided with a supply pipe a having a non return valve a³, and there is
provided, on the top of the tank b, a compressed air hand operated inlet valve. "This
valve consists of a cylinder or casing m, in which works a piston n, having inlet
ports, p, and exhaust ports, 9; these ports are so formed that the exhaust is closed
before the air inlet is opened. The valve is worked by the hand wheels.
i
It will be seen that the flush tank, b, illustrated in Figure 4, can be worked in two
ways, namely, its syphon d can be started by the discharging of the tumbling
vessel that is, when the tank b is full of liquid and the liquid stands at the same
level in the stand pipe and the syphon d, the next discharge of liquid from the
tumbling vessel which may be fed from any suitable source, will raise the level of
the liquid in the bend of the syphon d so as to cause it to go full bore: the tank b
may also be discharged by opening the compressed air valve m, the pressure of air
suddenly acting on the contents of the tank raises the level of the liquid so as to 'fill
the bend of the syphon d and thus cause the syphon d to go full bore, the valve
.::

page_text: in the stand pipe k and the valvo a³ of the supply pipe a' preventing the liquid from
passing through these ducts.
The. flush tanks and their parts in the drawings are shown mainly composed of
cast iron and constructed as closed tanks, but I would have it understood that other
material may be used, such as brickwork, concrete, or iron plate, the supply and
discharge pipes may also be of iron, earthenware, or cement.
Also the flush tanks
shewn at Figures 2 and 3 may be either closed tanks, as shown in the drawing, or
they, may be open tanks. Also the charge of liquid to start the syphon may be
provided by pneumatic, steam, hydraulic, or equivalent power.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed declare that what 1
claim is :-
1. Effecting the operation of sewer or drain flushing tanks having a syphon
discharge pipe, by pneumatically operated liquid pumping or forcing apparatus ;
substantially as set forth.
2. The Improvement herein described, in sewer or drain flushing tanks, consisting
in employing a syphonic discharge pipe with such tanks, and filling them intermittently
with large volumes of fluid by pneumatically operated apparatus, such volumes being
so large that one discharge into the tank when it is full will cause the syphon to act
and
go full bore.
3. Effecting the filling and discharge of sewer or drain flushing tanks, having a
syphon discharge pipe, by apparatus into which the flushing fluid first flows and
when full is discharged into said tanks by compressed air acting directly upon said
fluid for the purposes set forth.
4. Effecting the operation of the syphon discharge pipes of sewer or drain flushing
tanks by apparatus into which a fluid flows and when full is discharged by compressed
air admitted thereto and acting on the fluid therein, which discharge acts on said
syphon discharge pipe in such a manner as to charge it and cause it to act and go
full bore and thereby set in action the discharge of fluid from said flushing tank.
5. A sewer or drain flushing tank in which when the liquid rises or is raised to a
point about level with the bend of a syphon discharge pipe thereof, a charge of liquid
is forced by pneumatic pressure or other artificial power into said discharge pipe in
such a manner as to raise the fluid rapidly in said syphon discharge pipe and make it
go full bore.
6. A sewer or drain flushing tank having a syphon discharge pipe operating
substantially in the manner set forth with reference to Figures 1 and 2 of the
drawings hereto annexed.
.
7. A sewer or drain flushing tank as set forth with reference to Figure 2, com-
prising a receptacle b, a syphon discharge pipe d, a tumbling vessel i, a stand pipe k
having a float valve l, a valve m for supplying compressed air to and allowing it to
escape from said receptacle b, and a non-return supply valve a³.
8. In a sewer or drain flushing apparatus, the combination of a pneumatically
operated fluid forcing apparatus of the kind described, a receptacle to receive and
store fluid, and a syphon pipe connected with said receptacle through which the
contents of said receptacle are discharged, for the purposes set forth.
9. In a sewer or drain flushing apparatus, the combination of a pneumatically
operated fluid forcing apparatus of the kind described and a receptacle to receive
and store fluid, said forcing apparatus being adapted to fill said receptacle.
10. The employment in connection with sewer or drain flushing apparatus of a
tumbling vessel and a valve interposed between said tumbling vessel and the receptacle
or pipe into which fluid from said tumbling vessel is discharged or flows, whereby
the rise of fluid towards the tumbling vessel is prevented.
11. In a sewer or drain flushing apparatus the combination of a receptacle adapted
to receive and store liquid and a valve m adapted to control the supply of compressed
air to said receptacle and the escape of air used therein therefrom; for the purposes
set forth.

page_text: 12. A sewer or drain flushing tank arranged and adapted to operate substantially
as set forth with reference to Figure 3 of the Drawings hereto annexed.
13. A sewer or drain flushing tank arranged and adapted to operate substantially
as set forth with reference to Figure 4 of the Drawings hereto annexed.
• זום זו 63
CALL UN
ISAAC SHONE.
By Cheesbrough & Royston,
15, Water Street, Liverpool, Patent Agents.