An Improved Method of and Means for Filtering Liquids.
Year: 1892

page_text: Date of Application, 29th June, 1892
Complete Specification Left, 29th Mar., 1893-Accepted, 29th Apr., 1893
PROVISIONAL SPECIFICATION.
An Improved Method of and Means for Filtering Liquids.
I, BONIFACIO MEDINA SANTURIO, of Buenos Ayres, in the Argentine
Republic, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to an improved method of filtering liquids and to means
adapted for use in carrying out such method; its objects being, first, to enable
liquids to be filtered quickly without subjecting them to static or dynamic
pressure, or conducting them to a chamber in which a partial vacuum has been
formed, and, secondly, to reduce the cost of filtration.
According to the first part of my invention, I conduct the liquid to be filtered
into a revolving vessel, whereof the sides are made of permeable earthenware or
clay. The centrifugal force resulting from the rotation of the vessel urges the
liquid under treatment outwards in a radial direction and causes the same to
traverse the permeable sides of the vessel; the liquid being then received in a casing
or other receptacle and ultimately conveyed to a reservoir.
The means I prefer to employ in carrying out my improved method comprise a
cylindrical vessel made of permeable material and mounted to rotate on a hollow
shaft. The water to be filtered is admitted through one end of the hollow shaft
into the cylindrical vessel. The inner surface of this vessel may be provided with
longitudinal ribs, and the vessel may be partially charged with sand or other
suitable substance for the purpose of removing impurities adhering to the filtering
surface. The outlet for the wash-out water may be by way of the opposite end
of the hollow shaft. Or, it may be in one end of the vessel. It is closed by a
In either case, it is
cock, or by a cover-plate secured like a man-hole cover.
furnished with a grating adapted to prevent the escape of the sand, or other
cleansing substance.
When the vessel is caused to rotate at a high speed, the sand adheres to the
sides thereof, and has no appreciable cleansing effect. When, however, the speed
is sufficiently reduced, the sand is carried up by the longitudinal ribs until it has
nearly reached the highest point, whereupon it falls from the, for the time being,
upper side of the vessel under the influence of gravity to the, for the time being,
lower side of the vessel, and is again carried up by the ribs to again fall, and so
on repeatedly. The liquid which passes through the sides of and escapes from the
filtering vessel is caught by a curved screen or jacket, and is thence conducted to
a tank or reservoir for the reception of the filtered water. When the outlet is
opened, the wash-out water and the impurities escape, the sand being intercepted by
the grating.
Dated the 29th day of June 1892.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.
COMPLETE SPECIFICATION.
An Improved Method of and Means 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 method of filtering liquids and to

page_text: means adapted for use in carrying out such method; its objects being, first, to
enable liquids to be filtered quickly without subjecting them to static or dynamic
pressure, or conducting them to a chamber in which a partial vacuum has been
formed, and, secondly, to reduce the cost of filtration.
According to the first part of my invention, I conduct the liquid to be filtered
into a revolving vessel, whereof the sides are made of permeable earthenware or
clay. The centrifugal force resulting from the rotation of the vessel urges the
liquid under treatment outwards in a radial direction and causes the same to
traverse the permeable sides of the vessel; the liquid being then received in a
casing or other receptacle and ultimately conveyed to a reservoir.
The means I prefer to employ in carrying out my improved method are
represented in the accompanying drawing, which is a longitudinal vertical section.
A cylindrical vessel A A' A, the cylinder A of which is made of permeable
material, is mounted to rotate on a shaft C C¹. The part C of the shaft is solid
and screws into the hollow part C. The ends A' and A' of the vessel are held
tightly against the part A by means of screw-pins a and the nut A*. F is a
grating mounted concentrically with the cylinder A. It is connected by webs F¹
and F with the part of the shaft. A passage is left between the webs; the
bolts a being put through ferrules f1 extending from one web to the other. The
passage leads to a cavity f', which communicates by way of perforations c* with
the chamber and the passage c' in the part C' of the shaft. G is a gland for
closing the hole in which the bush E is placed; 9 being one of the gland-nuts.
The gland is perforated; g' being a plug for closing the perforation. The water
to be filtered is admitted through the inlet D into the cavity d, whence it flows
through the perforations in the bush E into the cavity e, and thence through the
perforations in the part C' into the passage c within the shaft. It escapes from
the passage c by way of the perforations into the cylindrical vessel. The inner
surface of the cylinder A may be provided with longitudinal ribs. The vessel is
partially charged with sand H or other suitable substance for the purpose of
removing impurities adhering to the filtering surface. The outlet for the wash-out
water is by way of the perforation in the gland. Or, it may be in one end A'
or A' of the vessel. It may be closed by a cock, or by a cover-plate secured like
a manhole cover. In either case, there is a grating which prevents the escape of
the sand or other cleansing substance. a are strengthening bands. K and K are
the bearing brackets. Lis the driving rigger.
When the vessel A A' A' is caused to rotate at a high speed, the sand H adheres
to the sides thereof, and has no appreciable cleansing effect. When, however, the
speed is sufficiently reduced, the sand is carried up by the longitudinal ribs until
it has nearly reached the highest point, whereupon it falls from the, for the time
being, upper side of the vessel under the influence of gravity round the cylindrical
grating to the, for the time being, lower side of the vessel, and is again carried
up by the ribs to again fall, and so on repeatedly. The liquid which passes
through the sides of the grating F and through the permeable cylinder A is caught
by a curved screen or jacket M containing a recess m at the bottom, whence it is
conducted by way of the nozzle m' to a tank or reservoir for the reception of the
filtered water. When the plug g' is removed, the wash-out water and the
impurities flow through the passage f, the perforations c, the chamber c, and
the passage c, finally escaping through the perforation in the gland G, the sand
being intercepted by the grating F.
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 herein-described method of filtering liquids whereby the liquid to be
filtered is conducted to a revolving vessel having sides of permeable earthenware
or clay through which the liquid is urged by centrifugal force and then caught in
a casing or other receptacle and conveyed to a suitable reservoir.
2. The herein-described apparatus for filtering liquids, the same comprising a

page_text: revolving cylinder A of permeable earthenware or clay mounted on a hollow
shaft.
3. The herein-described apparatus for filtering liquids, the same comprising &
revolving cylinder A of permeable earthenware or clay mounted on a hollow shaft
and containing sand or other cleansing substance.
4. The herein-described apparatus for filtering liquids, the same comprising a
revolving cylinder A of permeable earthenware or clay mounted on a hollow
shaft CC, a volume of sand H or other cleansing substance, a grating F, an
inlet D, an inlet passage c, outlet passages f and c* for the escape of the wash-out
water and impurities, and a casing M.
Dated the 29th day of March 1893.
G. G. M. HARDINGHAM,
191, Fleet Street, London, E.C., Chartered Patent Agent.