Fivering anк8.
Year: 1897

page_text: Date of Application, 19th Jan, 1897
Complete Specification Left, 26th June, 1897-Accepted, 31st July, 1897
PROVISIONAL SPECIFICATION.
Fivering anк8.
We, JOHN EMIL BENNETT, of 60, Ridgway Street, Moss Side, and HENRY BERESFORD
of 4, Corporation Street, Manchester, both in the County of Lancaster, Engineers, do
a hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in sewage and the like precipitating and
filtering tanks, the object being to render the same more expeditious, effective and to
great extent automatic in action.
To this end we build a tank having inclined partitions or vertical partitions which
are corrugated or formed zig-zag. At the lower end of these partitions hoppers are
formed cominunicating with syphon-shaped pipes having regulating taps. The inlet
end of the said tank is formed with a receiver into which the sewage or the like is
run and in which it is mixed with the precipitant. Between the said receiver and
tank a stationary or revolving screen is employed which removes the large solid
matter from the sewage previous to it entering the tank. On entering the said tank,,
the heavy particles or precipitated matter falls onto the said partitions and is conveyed
thereby into the hoppers below where it enters the aforesaid syphon pipes and is
caused to rise up the same by the head of sewage or fluid in the tank and can then be
run off through a trough or otherwise suitably dealt with.
At the outlet end of the said tank is formed a hopper shaped compartment into
which the partly purified sewage or fluid flows and inside of which a filter is suspended
consisting of a casing and filter bed or block at its bottom. The said casing reaches
above the sewage or fluid in the tank and causes it to pass through the said filter bed.
or block from below instead of from the top. Above the said filter bed or block an
outlet valve is arranged in the said casing, which by means of a flexible or jointed
pipe is connected to the outlet pipe of the tank. Inside the said filter casing is a
float which when down causes the filter to be locked in its working position and the
said casing itself is connected by means of a chain running over pulleys or by means of
a beam to a balance vessel containing also a float into which vessel a portion of the
effluent is run from the said outlet pipe at a predetermined velocity.
.
As the said vessel fills, its float closes the outlet valve and the filter casing fills,
which causes the float therein to rise and release the filter. By this time the said
balance vessel is full and its weight causes the filter to rise and the effluent in its
casing to pass through the filter bed or block therein in the reverse direction and the
solid matter accumulated at its underside to be removed, thus thoroughly cleansing
the filter automatically.
The said solid matter descends to the bottom of the hopper below the filter
where it leaves the tank through a pipe with regulating tap, such as previously
described.
When all the effluent in the filter casing has passed through the filter bed or block:
therein, the said balance vessel is caused to discharge its contents through a valve

page_text: and when empty is overcome by the weight of the filter which causes the latter
to descend and regain its working position, the float therein to descend and lock it in
position and the outlet valve to open again through the fall of the float therein.
In some cases where scum is liable to accumulate on the surface of the sewage
or fluid after having undergone précipitation we form a partition between the same
and the filter and in front of the latter we employ a stationary or a rotating screen
to prevent the said scum reaching the filter bed or block.
The effluent which leaves the said pipe may be used to drive a small turbine by
which the aforesaid screens can be rotated..
Dated this 10th day of Tann 1907
F. BOSSHARDT & Co.,
Agents to Applicants.
Improvements in Sewage and the like Precipitating and
Filtering Tanks.
We, JOHN EMIL BENNETT, of 60 Ridgway Street, Moss Side, and HENRY BERESFORD,
of 4, Corporation Street, Manchester, both in the County of Lancaster, Engineers, 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 improvements in sewage and the like precipitating and
filtering tanks, the object being to render the same more expeditious, effective and to a
great extent automatic in action.
And in order that our invention may be more fully understood we have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures, Fig. 1 being partly a longitudinal section
and partly a side view of a sewage and the like precipitating and filtering tank
constructed in accordance with our invention, Fig. 2 a plan of a portion thereof, and
Figs. 3 & 4 longitudinal sections of some modifications.
"
In carrying out our invention and referring to Fig. 1, we build a tank a having
inclined partitions a¹ at the lower end of which, hoppers b are formed, see also
Fig. 2, communicating with syphon shaped pipes c having regulating taps c¹. The
inlet end of the tank a is formed with a receiver d into which the sewage or fluid is
run and in which it is mixed with the precipitant. Between the receiver d and
tank a, a stationary or revolving screen, in the present instance a stationary screen e
is employed; which removes the large solid matter from the sewage or fluid previous
to it entering the tank a. On entering the tank a, the heavy or precipitated matter
falls onto the partitions al and is conveyed thereby into the hoppers b below, from
whence it is forced up the syphon pipes c by the head of sewage or fluid in the
tank a and then run off from the same through a trough f, or otherwise suitably
dealt with.
At the outlet end of the tank a is formed a hopper shaped compartment g the
bottom of which also communicates with a syphon pipe (not shown) such as described
in connection with the hoppers b. Into this compartment the partly purified sewage
or fluid flows and inside of which a filter is suspended, consisting of a casingh and filtering
medium at its bottom. The casingh reaches above the level of the sewage or fluid
in the tank a and causes the sewage or fluid to pass through the filtering inedium i
from below. Above the latter an outlet valve is arranged in the casing h, which by
means of a flexible or jointed pipe is connected to the outlet pipe k' of the tank a.

page_text: To the inside of the filter casing is hinged a float m which in its lowest position
retains the filter in its working or normal position, in the present instance through
the medium of a rod m¹ connected to the float m and to a weighted lever m² carrying
a pawl m³ engaging in a ratchet wheel m formed on a pulley n¹ or secured on its
axis. The casing his connected by means of a chain n running over the pulleys n', n¹,
(or by means of a beam) to a balance vessel o having hinged therein also a float p,
into which vessel a portion of the filtered fluid is run from the said outlet pipe at a
predetermined velocity.
As the vessel o fills, the float p, through its connection o' closes the outlet valve k
and the filter casing fills, which causes the float m therein to rise, lift the rod m¹
and lever m² and thus move the pawl m³ out of gear with the ratchet wheel m* and
release the filter. By this time the balance vessel o is full and its weight causes
the filter to rise and the filtered fluid in its casing to pass back through the filtering
medium and the solid matter accumulated on its underside or in the same to be
removed, thus thoroughly cleansing the filter automatically.
The said solid matter drops to the bottom of the hopper g and expelled therefrom
through the syphon pipe connected therewith, by the head of water in the
tank a.
When all the filtered fluid in the filter casingh has passed through the filtering
medium the valve 9 is raised off its seat by coming into contact with and being
raised by the weighted lever employed in the pipes and the balance vessel o
discharges its contents into the latter whilst when empty its weight is overcome by
that of the empty filter which then is permitted to descend and regain its working
position, whilst the float m therein also descends and locks the filter in its normal
position and the outlet valve k opens again through the fall of the float p in the
vessel o.
In some cases where scum is liable to accumulate on the surface of the sewage
or fluid after having undergone precipitation we may employ a screen & in front of
the filter, in the present instance a stationary one t, to prevent the said scum reaching
the filtering inedium.
The filtered fluid which leaves the said pipe may be used to drive a small turbine
by which the aforesaid screens can be rotated.
In lieu of having only one inclined partition a¹ for each of the hoppers b, two or
more may be employed as shown in Figs. 3 & 4, and the section of the hoppers / may
also be varied at will for instance as shown in Fig. 4.
We wish it to be understood that we do not confine ourselves to the means shown
and described for periodically raising and lowering the filter for the purpose of causing
the body of water above to flush back through the same, as the saine ends may
be attained in another way, for instance, by hydraulic means, as may be found most
convenient, without departing from the nature of our invention.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what we
claim, is :-
1st. In sewage and the like precipitating and filtering tanks, wherein the sewage
or fluid to be filtered ascends through the filtering medium, means for raising the
said filtering medium periodically for the purpose of causing the head of filtered
fluid above to flush back and thus remove the solid matter accumulated in or on the
underside of the filtering medium, all substantially as set forth.
2nd. In sewage and the like precipitating and filtering tanks having a filtering
medium i, such as specified in the preceding claim, the employment of a flexible or
jointed outlet pipe , all substantially as and for the purpose set forth.
3rd. In sewage and the like precipitating and filtering tanks, inclined partitions a¹
arranged inside the tank in connection with the hoppers b at the lower ends, which
partitions serve to collect and convey the precipitated or solid matter to the said
hoppers, all substantially as set forth.
4th. In combination with the hoppers b & g syphon like pipes c through which

page_text: the precipitated or solid matter can be removed from the hoppers b & g at will by the
head of fluid in the tank, all substantially as set forth.
Dated this 25th day of June 1897.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants.