An Improved Apparatus for Filtering Liquids.
Year: 1892

page_text: Date of Application, 12th Aug., 1892
Complete Specification Left, 12th May, 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Filtering Liquids.
I, BONIFACIO MEDINA SANTURIO, of Buenos Ayres, in the Argentine Republic,
at present residing at 1, Rue Rougemont, Sevran, Seine, in the Republic of France,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved apparatus for filtering liquids by means of
permeable earthenware or similar material.
In carrying out this invention, two hollow discs of corrugated permeable material
are mounted on a hollow shaft. Each disc is comparatively thin at the periphery,
and gradually becomes wider toward the boss, which is the widest part. A space
is consequently left between the discs. The hollow shaft is provided with a collar,
against which the inner disc is placed. A leather washer is put between the collar
and the disc, another leather washer between the two discs, and a third leather
washer between the outer disc and a metal washer, against which a nut on the end
of the shaft is screwed. Each disc is made in two parts; each part being corrugated.
When these parts are placed face to face to form the disc, a series of annular
cavities are left in the disc owing to the corrugations. The boss of the disc is
hollow and communicates by small passages with the first of the annular cavities.
The hollow shaft is mounted to rotate in a casing, which encloses the discs. One
end of the shaft is stopped by a plug; the other end forming the outlet for the
filtered water. The inlet for the water to be filtered is at the top of the casing.
The lower part of the casing is filled with sand, and contains the outlet for the
wash-out water. This outlet is covered by a grating, and may be closed by a cock
or other suitable device.
The water in the tank permeates the material of which the discs are made and
is thus filtered; the filtered water finding its way into the annular cavities and
thence from one cavity to another into the hollow boss and, through apertures in
the shaft, to the bore of the shaft, whence it is drawn off. In order to clean the
filtering surfaces, the discs are caused to rotate in the sand, which removes the
impurities. To clean the sand, the outlet at the bottom of the casing is opened,
and water forced through; the wash-out water and impurities escaping through the
grating, which keeps back the sand.
Although I have described the apparatus as containing two discs, it will be
obvious that only one disc or that more than two may be employed. The discs are
more effective if corrugated, but they may be plain.
Dated the 19th dow of August 1800
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.
COMPLETE SPECIFICATION.
An Improved Apparatus for Filtering Liquids.
I, BONIFACIO MEDINA SANTURIO, of Buenos Ayres, in the Argentine Republic,
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 :-
This invention relates to an improved apparatus for filtering liquids by means of
permeable earthenware or similar material.
In the accompanying drawings,
Fig. 1 is a view, partly in side elevation and partly in longitudinal section on the

page_text: line 1, 1 in Fig. 3, of the improved apparatus; Fig. 2 being a view partly in front
elevation and partly in section on the line 2, 2 in Fig. 1.
Fig. 3 is a corresponding rear elevation.
In carrying out this invention, hollow discs j of corrugated permeable material
are mounted on a hollow shaft k; ten discs being shown in Fig. 1 by way of
example. Each disc is comparatively thin at the periphery, and gradually becomes
wider toward the boss, which is the widest part. A space is consequently left
between the discs. The hollow shaft is provided with a collar t, against which the
innermost disc is placed. A leather washer m is put between the collar and the
innermost or first disc, another leather washer m between the first and second discs,
another between the third and fourth, and so on, until finally a leather washer is
placed between the outermost or last disc and a metal washer, against which a nut?
near the outlet end of the shaft k is screwed. Each disc is made in two parts, each
part being corrugated. When these parts are placed face to face to form the disc,
a series of annular cavities are left in the disc owing to the corrugations. The boss
of the disc is hollow and communicates by small passages with the first of the
annular cavities. The hollow shaft is mounted to rotate in a casing a, which
encloses the discs j. One end of the shaft is stopped by a plug; the other end
being furnished with an outlet-nozzle for the filtered water. The inlet for the
water to be filtered is at the bottom, but may be at the top, of the casing a. It
communicates by way of the passage d with the passage, the top of which
contains perforations to permit the unfiltered water to flow through. The
perforations are, however, too small to allow the sand, with which the lower part
of the casing is filled, to fall through them into the passage f. The outlet c is for
the wash-out water. This outlet communicates by way of the passage e with the
passage, the bottom i of which contains perforations large enough to allow the
water but not the sand to pass through. The said outlet may be closed by a cock
or other suitable device. The shaft is supported by a bearing-nut in the stuffing-
box s on the end of the casing a. The shaft and discs can be rotated by means
of the wheel u. o is an annular ring screwed into the front end of the casing. The
cover is secured to the ring o by bolts; packing p being inserted to make a
water-tight joint. The outlet end of the shaft k is carried by a bearing-nut in a
stuffing-box in the cover n.
The water in the tank or casing permeates the material of which the discs ; are
made and is thus filtered; the filtered water finding its way into the annular
cavities and thence from one cavity to another into the hollow boss and, through
apertures in the shaft h, to the bore of that shaft, whence it is drawn off through
the nozzle 7. In order to clean the filtering surfaces, the discs are caused (by
means of the wheel ) to rotate in the sand v, which removes the impurities. To
clean the sand, the outlet c at the bottom of the casing is opened, and water forced
through. The wash-out water and impurities escape through the perforations in
the bottom of the passage g; the perforated bottom keeping back the sand.
Although the apparatus shown by way of example in Fig. 1 contains ten dises,
it will be obvious that any other convenient number of discs or that only one disc
may be employed. The discs are more effective if corrugated, but they may
be plain.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim :---
1. The improved apparatus for filtering liquids constructed and operating
substantially as herein described.
2. The improved apparatus for filtering liquids, arranged substantially as herein
described, and comprising a hollow disc (or discs) mounted on a hollow shaft and
enclosed in a suitable tank or casing containing sand through which the disc works
for cleansing purposes.
3. The improved apparatus for filtering liquids, arranged substantially as herein
described, and comprising a hollow disc or discs mounted on a hollow shaft and

page_text: rotating in a suitable tank or casing containing sand; an outlet for the wash-out
water being provided and protected by a grating or perforated partition which
serves to retain the sand without preventing the escape of the wash-out water and
impurities.
Dated the 12th day of May 1893.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.