A New Process of and Means for Automatically Cleansing Filter Material.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.,
A New Process of and Means for Automatically Cleansing Filter
Material.
I, HANS REISERT, of 34, Huhnsgasse, Cologne, German Empire, Mechanical
Engineer, do hereby declare the nature of this invention to be as follows:-
:-
My invention relates to a process and an apparatus for carrying the same into
effect for automatically and non-automatically cleansing filter material by sucking
filtered water and air together through the same by means of a siphon.
In order that my invention may be fully understood I will proceed to describe
the drawings annexed in which Fig. 1 shows the apparatus in action, Fig. 2
shows how the cleansing of the filter-material is effected.
The water to be filtered flows through a pipe a into the reservoir b, and from
there into the chamber c above the filter bed f. The latter rests upon the per-
forated bottom y. The water rushes through the filterstuff (f) from top to
bottom, passes on into the chamber and is fed from there through the pipe k
into the reservoir r. It flows off through the cup d and the waste-pipe p, so that
the level n is uniformly maintained. The filterstuff f offers a continually increas-
ing resistance to the inrush of water in proportion to the mass of silt left, behind
so that in the cylinder the level of the unfiltered water must con-
tinually rise, while that of the filtered water in the reservoir. remains
the same. Further in the reservoir a receiver is arranged, which is closed
at its upper end and stands in close connection with the chamber c. ..In, this
receiver, there is a pipes which discharges underneath the filter-apparatus into
a silt-room. The connection of the receiver and the pipe s which discharges
underneath the filter, together produce a siphon, for there will be a sucking
action set up as soon as within the receiver the rising water reaches the upper
mouth of the pipe s. Now exactly as the unfiltered water in the, cylinder b
rises proportionally to the silt retained in the filter, so the level in the unfiltered
water in the receiver / rises until it reaches the opening of the pipe s. At this
moment the siphon -s commences working and sucks the filtered water out of
the receiver through the pipe k and through the filterstuff ƒ from bottom to
top. At the same time air is sucked through the air pipe w. By the perforated
pipe this air is distributed under the filter material and it passes the same
together with the filtered water. By the use of a combination of air and water
for digging up and cleansing the filter material a much better result is obtained
than by the use of water alone. The air sucked through the filter material gathers
under the air-tight bottom t and causes as soon as it reaches the opening of the
receiver the discontinuation of the cleansing process by entering the siphon 7 s.
The diameter of the receiver is large enough to suck water and air in nearly
the same quantities.
After the working of the siphon has been stopped by the entrance of the air,
the filtering process begins again. The air which gathered in the chamber
underneath the bottom t escapes through the pipe g and the outlet valve h, while

page_text: the air in the receiver escapes through the outlet valve i. These valves are
naturally constructed so, that they do not allow any air to enter, but only to
leave the apparatus.
In order to effect the cleansing of the filter material, an arrangement
is provided, by which the rising of the unfiltered water can be caused
and the siphon can be started by closing the outlet valve o for the filtered
water. This arrangement consists in a float m provided in the chamber r, which
float is connected by the bar q with the conical valve o.
By turning off the valve e the filtered water will rise in the reservoir r and
lift the float m, so that the valve o will be closed and no more water can enter
the reservoir r. In consequence hereof the water will rise in the receiver / and
will soon reach the upper mouth of the pipe s. The siphons consequently com-
mences working and the cleansing of the filter material begins.
A New Process of and Means for Automatically Cleansing Filter
Material.
I, HANS REISERT, of 34, Huhnsgasse, Cologne, German Empire, Mechanical
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 relates to a process and an apparatus for carrying the same into
effect for automatically and non-automatically cleansing filter material by sucking
filtered water and air together through the same by means of a siphon.
In order that my invention may be fully understood I will proceed to describe
the drawings, accompanying the Provisional Specification, in which Fig. 1 shows
the apparatus in action, Fig. 2 shows how the cleansing of the filter-material is
effected.
E0
The water to be filtered flows through a pipe « into the reservoir b, and from
there into the chamber above the filterbed f. The latter rests upon the per-
forated bottom y. The water rushes through the filterstuff (f) from top to
bottom, passes on into the chamber y and is fed from there through the pipe k
into the reservoir r. It flows off through the cup d and the waste-pipe p, so that
the level n is uniformly maintained. The filterstuff f offers a continually increas-
ing resistance to the inrush of water in proportion to the mass of silt left behind
that in the cylinder b the level of the unfiltered water must con-
tinually rise, while that of the filtered water in the reservoir r remains
the same.
Further in the reservoir r a receiver is arranged which at its upper
end is closed and stands in close connection with the chamber c. In this
receiver 1, there is a pipes which discharges underneath the filter-apparatus into
a silt-room. The connection of the receiver and the pipe s which discharges
underneath the filter, together produce a siphon, for there will be a sucking
action set up as soon as within the receiver the rising water reaches the upper
mouth of the pipe s. Now exactly as the unfiltered water in the cylinder b
rises proportionally to the silt retained in the filter, so the level in the unfiltered
water in the receiver rises until it reaches the opening of the pipe s. At this
moment the siphon -s commences working and sucks the filtered water out of

page_text: the receiver through the pipe k and through the filterstuff
from bottom to
top. At the same time air is sucked through the air pipe . By the perforated
pipe this air is distributed under the filter material and it passes the same
together with the filtered water. By the use of a combination of air and water
for digging up and cleansing the filter material a much better result is obtained
than by the use of water alone. The air sucked through the filter material gathers
under the air-tight bottom t and causes as soon as it reaches the opening of the
receiver the discontinuation of the cleansing process by entering the siphon s.
The diameter of the receiver is large enough to suck water and air in nearly
the same quantities.
After the working of the siphon has been stopped by the entrance of the air,
the filtering process begins again. The air which gathered in the chamber c
underneath the bottom escapes through the pipe g and the outlet valve h, while
the air in the receiver escapes through the outlet valve i. These valves are
naturally constructed so, that they do not allow any air to enter, but only to
leave the apparatus.
In order to effect the cleansing of the filter material, non-automatically an
arrangement is provided, by which the rising of the unfiltered water can be
caused and the siphon can be started by closing the outlet valve o for the filtered
water. This arrangement consists in a float m provided in the chamber r, which
float is connected by the bar q with the conical valve o.
By turning off the valve e the filtered water will rise in the reservoir r and
lift the float m, so that the valve o will be closed and no more water can enter
the reservoir r. In consequence thereof the water will rise in the receiver and
will soon reach the upper mouth of the pipe s The siphons consequently com-
mences working and the cleansing of the filter material begins.
3.
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:-
1. The process of automatically cleansing filter-material, consisting in forcing
a column of unfiltered water to rise during the period of filtering in consequence
of the increasing resistance of the impurities retained in the filtermaterial to
such a degree, as to introduce the action of a siphon, sucking cleansing-water
and air through the filtermaterial, and stopping the action of the said siphon by
the entrance of air into the same, substantially as set forth.
2. In an apparatus for carrying this process into effect the combination with
an air tight room c above the filter-material and a siphon connecting this room
with a silt room below the filter, said siphon consisting of a receiver 7, provided
with a valve i for allowing air to leave, but not to enter this receiver, and a
pipe s leading from the top of this receiver to the silt-room, of a perforated pipe x,
provided below the filtermaterial and connected with the atmosphere by an air
pipe w.
3. In an apparatus claimed in Claim 2 means for effecting the commencing
of the cleansing operation by closing the outlet valve for the filtered water, con-
sisting of a float m, connected by a bar q with a valve o.
this th day of October 1899.
GEO. THOS. HYDE,
1, Broad Street Buildings, Liverpool Street, London, E.C.,
Agent for the Applicant.