Improvements in Devices for Cleansing and Scouring Filters and the like.
Year: 1889

page_text: Date of Application, 7th May, 1889
Complete Specification Left, 30th Jan., 1890-Accepted, 8th Mar., 1890
n
PROVISIONAL SPECIFICATION.
Improvements in Devices for Cleansing and Scouring Filters
and the like.
- T
I, HEINRICH WILHELM BERKEFELD, of Celle, in the Empire of Germany,
manufacturer, do hereby declare the nature of this invention to be as follows
-
The present invention relates to an improved device for cleansing and scouring
filters the filtering body of which consists of a tube closed at the bottom, and which
cleansing device is constructed in such a manner that the outside of the filtering body
is scoured by means of brushes or the like while the flushing and cleansing apparatus
is being operated.
5.
1
"
To this end the spindle of the flushing valve is provided with a frame-work carrying
brushes and surrounding the filtering body in such a manner that the brushes are in
contact with this body. This frame-work is capable of being turned with the spindle
when the latter is turned to open the valvè, and the brushes remove all foreign
substances which may have settled on the outside of the filtering body after which
they are entirely removed with part of the unfiltered fluid through the opened flush
valve
"
1
If
The tubular filtering body is closed at the bottom and consists of burnt infusorial
earth or any other suitable filtering material and is fastened to a lid by means of
cement or otherwise." The said filtering body is introduced into a preferably circular
onter casing in such a manner as to leave in this casing an annular space surrounding
the filtering body and a space below it for any possible sediment. Into these spaces
the fluid to be filtered enters through a suitable inlet tube, is then filtered through the
tubular body and afterwards leaves the interior of the latter through an outlet
any dirt or other foreign substance has settled on the exterior of the filtering body so
as to choke its pores, the spindle of the flushing valve is 'turned by means of a hand
wheel or otherwise. This spindle is screw threaded and is provided with brushes,
sponges or other suitable cleansing or scouring dévices in contact with the filtering
body which is cleansed and scoured thereby both when the valve is being opened and
closed. When the valve is open any sediment in the space below the filtering body
together with the dirt removed from the exterior of the latter are discharged from the
apparatus through the open valve and a suitable outlet either by the non-filtered fluid
itself or by another fluid specially introduced into the apparatus.
71
"
The efficiency of the cleansing operation can easily be ascertained by the state of
the fluid coming through the outlet which latter also permits of the drawing off of
unfiltered fluid at will
٦٧,٦
f
It is evident that any suitable sort of valve may be employed which can be opened
and closed by turning or lifting its spindle.
This arrangement-has the great advantage over other arrangements of similar
construction in providing for the flushing of the outer casing and the cleansing or
scouring of the filtering body by one and the same movement and in admitting of the
operation being watched and effected at any time without fail in a very easy manner.
Doted the 7th day of May 1889
$
T

page_text: COMPLETE SPECIFICATION.
Improvements in Devices for Cleansing and Scouring Filters
and the like.
I, HEINRICH WILHELM BERKEFELD, of Celle, in the Empire of Germany,
manufacturer, 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 :-
The present invention relates to an improved device for cleansing and scouring
filters the filtering body of which consists of a tube closed at the bottom, and which
cleansing device is constructed in such a manner, that the outside of the filtering body
13 scoured by means of brushes or the like while the flushing and cleansing apparatus
is being operated, the arrangement being preferably such, that the brushes not only
move up and down the filtering body, but also around the same.
To this end the spindle of the flushing valve is provided with a framework carrying
brushes and surrounding the filtering body in such a manner that the brushes are in
contact with this body This framework is capable of being turned with the spindle
when the latter is turned to open the valve, and the brushes remove all foreign
substances which may have settled on the outside of the filtering body, after which
these substances are entirely removed with part of the unfiltered fluid through the
opened flush valve.
The accompanying drawing represents the filter and cleansing device in vertical
section.
The tubular filtering body a is closed at the bottom and consists of burnt infusorial
earth or any other suitable filtering material and is fastened to a lid 6 by means of
cement or otherwise. The said filtering body is introduced into a preferably circular
outer casing d in such a manner as to leave in this casing an annular space A
surrounding the filtering body and a space B below it for any possible sediment.
Into these spaces the fluid to be filtered enters through a suitable inlet tube f, is then
filtered through the tubular body a and afterwards leaves the interior of the latter
through an outlet 9. If any dirt or other foreign substance has settled on the exterior
of the filtering body a so as to choke its pores, the spindle of the flushing valve v is
turned by means of a hand wheel or otherwise. This spindle is screw-threaded at m
and is provided with brushes K sponges or other suitable cleansing or scouring
devices in contact with the filtering body, which is cleansed and scoured thereby both
when the valve is being opened and closed, by the said brushes_ etc._moving_both_up
and down and around the filtering body. By the same movement of the spindle the
valve is opened, so that any sediment in the space B below the filtering body
together with the dirt removed from the exterior of the latter is discharged from the
apparatus through the open valve and a suitable outlet p either by the non-filtered
fluid itself or by another fluid specially introduced into the apparatus.
0
The efficiency of the cleansing operation can easily be ascertained by the state of
the fluid coming through the outlet p which latter also permits of the drawing off of
unfiltered fluid at will.
It is evident that any suitable valve may be employed which can be opened and
closed by turning or lifting its spindle, and the filtering body need not necessarily be
round, but may be rectangular, oval or any other suitable shape in section; in which
case the brushes will only move longitudinally and not be capable of moving around
the filtering body as aforesaid.
This arrangement has the great advantage over other arrangements of similar
construction in providing for the flushing of the outer casing and the cleansing or
scouring of the filtering body by one and the same movement, and in admitting
of the operation being watched and effected at any time without fail in a very easy
manner.
The arrangement herein described mainly differs from any pre-existing devices for
the same purpose in that the rinsing of the filtering case and the scouring of the

page_text: filtering body are here caused by one movement of the hand, so that both operations
can at any time be easily performed and superintended.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A cleansing and scouring device for filters with cylindrical filtering bodies,
characterised by a spindle such as h carrying the flushing valve and the brushes or
other scouring device such as K whereby the outside of the filtering body is cleansed
and the filter casing flushed and washed out substantially as described and illustrated
in the accompanying drawings.
2. In a cleansing or scouring device for filters or tubular filtering bodies, the
cleansing of such bodies by means of a brush or similar scouring device such as K
which by the operation of a spindle such as his simultaneously moved along and
around the said filtering body, substantially as herein described and illustrated in the
accompanying drawings.
Dated this 30th day of Jannery 1800
W P. THOMPSON & BOULT,
Agents for the Applicant.