Improvements in Arrangements and Apparatus for Filtration of Sewage.
Year: 1896

page_text: Date of Application, 15th Jan., 1896
Complete Specification Left, 15th Oct., 1896-Accepted, 15th Jan., 1897
PROVISIONAL SPECIFICATION.
Improvements in Arrangements and Apparatus for Filtration of
Sewage.
I, RUDOLPH EMIL VON LENGERKE, of No. 1 Victoria Street, Westminster,
in the County of London, Civil Engineer, do hereby declare the nature of this
invention to be as follows:-
It has been found by experiment that filtration of sewage is satisfactorily effected
by leaving the sewage liquid for a time quiescent on the filter bed, and after it is
drained off, leaving the filter for a time after being drained and before being
charged again with liquid. My invention relates to arrangements of filter beds and
supply and discharge apparatus in such a manner that the sequence of operations
above set forth is effected automatically. For this purpose, I divide the filtering
area by partitions into 4 approximately equal separate filtering beds, all of which
have their supply and discharge pipes and valves arranged in a chamber situated
where the partitions meet each other. I connect the outlet and inlet valves of each
bed to each other so that when the outlet valve is opened by the pressure of the
liquid in the bed it closes the inlet valve, and I also connect the valves belonging
to one bed to the valves of another of the beds so that the opening of the outlet
valve and closing of the inlet valve of the one closes the outlet valve and opens
the inlet valve of the other, and conversely. The valves, after being moved either
to open or close, are held by detents connected to floats one of which is arranged
in each filter bed, the floats releasing the valves in such manner that the 4 filter
beds pass in rotation through 4 phases each becoming charged during a certain
time, remaining charged for a time, discharging for a time, and remaining drained
for time.
The liquid may be supplied to these filter beds direct from the sewer, or after
removal of some of the solid matter suspended in it, which may be done in any
known manner.
Dated this 15th day of January 1896
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Arrangements and Apparatus for Filtration of
Sewage.
I, RUDOLPH EMIL VON LENGERKE, of No. 1 Victoria Street, Westminster,
in the County of Loudon, Civil 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 :-
It has been found by experiment that filtration of sewage is satisfactorily effected
by leaving the sewage liquid for a time quiescent in the filter bed, and after it is
D.....

page_text: drained off, leaving the filter to dry for a time after being drained and before being
charged again with liquid.
My invention relates to arrangements of filter beds and supply and discharge
apparatus in such a manner that the sequence of operations above set forth is
effected automatically.
For this purpose, I arrange the filter beds and valve apparatus as I shall describe
referring to the accompanying drawings-Fig. 1 is a plan and Fig. 2 is a section of
the valve apparatus. I divide the filtering area by partitions into 4 approximately
equal separate filtering beds A¹ A A A all of which have their supply and
discharge pipes and valves arranged in a chamber situated where the partitions
meet each other. I connect the outlet and inlet. valves.O and I of each bed to
each other by crossheads and side rods so that when the outlet valve O is opened
by the pressure of the liquid in the bed it closes the inlet valve I, I also connect
the valves belonging to one bed to the valves of another of the beds so that the
opening of the outlet valve and closing of the inlet valve of the one closes the
outlet valve and opens the inlet valve of the other, and conversely.
The valves after being moved either to open or close, are held by detents
connected to floats F1 F2 F3 F4 oue in each filter bed, the floats releasing the
valves in such manner that the 4 filter beds pass in rotation through 4 phases each
becoming charged during a certain time, remaining charged for a time, discharging
for a tine, and remaining drained for a time.
The lever of the float F is connected by a chain to the horizontal arm of a bell
crank lever L' the upright arm of which is urged by a spring against a segment S
linked to the valves 10.of the bed A¹, the segment having a notch into which a
projection from the upright arm of L' can enter. In like manner the float F' is
connected to a segment S2 connected to the valves of A, the float F2 to a
segment S³ connected to the valves of A³, and the float F to a segment S
connected to the valves of A. When A is empty the float F1 being down, the
lever L to which it is connected is allowed to bear against the segment, so that
when the inlet valve of A2 is opened the projection of L enters the notch of S (as
shewn in Fig. 2, with respect to L and S³) holding the valve open until by the
ascent of the float F¹ when A' is filling the lever L is withdrawn from S³ (as
shewn with respect to L' and S') leaving the valves of A2 free, whereupon the
outlet valve of A2 opens closing the inlet valve. In a similar way the other floats
operate on the valves but an arm of S' is connected by a rod R¹ to an arm of S³,
and similarly an arm of S2 is connected to an arm from S, so that when the outlet
valve of A is open and its inlet valve is closed the outlet valve of A³ is closed
and its inlet valve is open and conversely and in like manner as to the valve
of A and A.
The liquid may be supplied to these filter beds direct from the sewer, or after
removal of some of the solid matter suspended in it, which may be done in any
known manner.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The herein described method of arranging and working sewage filters in
rotation.
2. For operating four filter beds in rotation, valve and float apparatus constructed
and arranged substantially as described with reference to the accompanying
drawings.
D
قعد
ABEL & IMRAY,
Agents for the Applicant.