Improvements in Rotary Filtering Apparatus.
Year: 1887

page_text: Date of Application, 28th June, 1887
Complete Left, 14th Sept., 1887
Complete Accepted, 18th Oct., 1887.
Improvements in Rotary Filtering Apparatus.
I, JOHN HOWES of Worcester, in the County of Worcester and State of Massachusetts,
United States of America, Gentleman, do hereby declare the nature of this invention
to be as follows:
The object of my present invention is to provide a filtering apparatus of improved
construction, in which the filtering surface may be revolved within the enclosing ense
or cylinder, by conveniently applied power, while reverse flow of liquid is afforded
from an elevated tank, to facilitate the cleansing or removal of deposited sediment
from said surface; and my invention consists in a filter organized for operation as
herein described, and in the constructive features and details, as more particularly
and definitely hereinafter specified.
The case or main cylinder may be of any desired size in diameter and length.
The heads for closing the ends of the cylinder are secured thereto by screw-bolts
or other suitable fastenings.
A centre arbor or spindle, journaled in the head is provided with suitable gears or
pulleys for effecting rotation of said arbor and parts connected therewith.
core.
A tubular shaft or hollow core is provided having passages from the exterior to its
interior and provided with heads and annular flanges for supporting the filtering
material. Longitudinal flanges or ribs may also be formed on the exterior of the
This core is journaled at one end in the head-and at its other end is connected
with the arbor for support, and rotation therewith, preferably by a detachable connection.
A disc or plate is is provided arranged on the spindle or arbor and fixed to revolve
therewith by a key or pin. The plate is provided with recesses or holes that engage
with pins that are fixed in the head of the core shaft, so that said core will revolve
with the action of the arbor.
The filtering material disposed as a cylinder or covering about the supporting core
and its flanges may consist of a tube or cylinder, preferably of felt, supported by an
outer and inner guard cylinder of wire netting, as for instance, of hexagonal or
octagonal shape instead of circular, and with a woven fabric, paper or other suitable
substance in lieu of felt, or with perforated metal instead of wire netting.
The ends of the tube or filter-felt are each firmly secured to the peripheries of the
core heads by means of clamping hoops or hands, which pass around the ends of the

page_text: filter and are tightened thereon hy a screw,
ends of the filter if desired.
The packing may be used under the
A bar or plate arranged across the end of the main cylinder is provided for
supporting the core when the head is removed.
Suitable stuffing boxes are provided on the heads for packing the bearing joints.
Brass washers may be introduced to take the end wise wear of the moving parts, as
described.
The inlet or supply pipe through which the water enters the chamber, is provided
with a stop-cock for closing said inlet.
A suitable delivery pipe is provided through which the filtered water is conveyed
from the tube and chamber within the filter, to the place of its delivery, or to suitable
storage tank located at a convenient height above the filter; as for instance, in the
attic of the building, or so that the liquid will flow in reverse direction when the
waste is opened. This pipe is fitted to the end of the core or shaft which forms the
axial delivery for filtrate by a turning joint, and a suitable stuffing box is provided to
make a tight connection while permitting the rotation of the shaft.
A cock may be provided in said pipe.
The waste outlet, and the cock, for removing the sediment from the chamber is
provided. Said outlet is preferably located in the side of the cylinder when the
apparatus is used in a horizontal position but in ease the apparatus is for use in
upright position, said outlet may be made at one or the other of the ends.
The end of the arbor enters and centres the core, and this, together with pins forms
a connection that may be easily detached so that the filtration cylinder and its
support core can be withdrawn from the main cylinder or case when desired.
In filters of large size, to withdraw this cylinder when the apparatus is in horizontal
position, the head is first removed, the end of the core being supported by a bar. A
board or guide is then inserted into a cylinder beneath the filtration cylinder, after
which the bar is removed and the filtration cylinder drawn out along the board or
guide. For again replacing the filtration cylinder this operation is reversed.
In the operation of this filtering apparatus, the water or other liquid under some
degree of pressure, enters the chamber from the pipe, passing through the filtration
cylinder to a chamber, and from thence by way of passages, hollow, and pipe to
the storage tank or place of delivery, the sediment being deposited on the exterior
of the filtration cylinder.
To cleanse the filter, the core and filter are revolved rapidly by power applied to
the spindle, while the discharge cock is open and with either of the cocks open,
closed, or partially closed to a greater or less degree, as desired.
The longitudinal ribs insure motion of the liquid within the chamber as the filter
is revolved and developes considerable centrifugal force which in connection with the
backward flow of liquid through the axial passage and filter from the storage tank,
which is preferably located above the level of the filter, serves to loosen and wash off
the mud or sediment lodged on the surface of the felt.
This filtering apparatus is adapted for large works and factories, but it may also be
made in small sizes, and the arbor arranged to be revolved by hand power as well as
by machinery.
n
WM. P. THOMPSON & Co.,
Agents for the Applicant.

page_text: I, JOHN HOWES, of Worcester, in the County of Worcester and State of Massachusetts,
United States of America, Gentleman, 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 object of my present invention is to provide a filtering apparatus of improved
construction, in which the filtering surface may be revolved within the enclosing case
or cylinder, by conveniently applied power, while reverse flow of liquid is afforded
from an elevated tank, to facilitate the cleansing or removal of deposited sediment
from said surface; and my invention consists in a filter organized for operation as
illustrated and described, and in the constructive features and details, as more
particularly and definitely hereinafter specified.
In the drawings:
-
Figure 1, is a longitudinal, central section of a filtering apparatus, illustrating the
nature of my invention.
Figure 2, is a transverse section of the same at the line.
Figure 5, is a sectional view at the line yy, showing the manner of supporting the
filter core, and
Figure 4, is a side view of the clamp for securing the felt to the core.
In reference to parts, A denotes the case or main cylinder, which may be of any
desired size in diameter and length. (As shown in the present drawings, the length
is somewhat less in proportion to the diameter, than would ordinarily be used in
practice, the limit of the drawing sheet, rendering it more convenient to show it
thus shortened.)
A and A indicate the heads for closing the ends of the cylinder A secured thereto
by screw-bolts or other suitable fastenings.
B indicates a centre arbor or spindle, journaled in the head A' and provided with
suitable gears or pulleys B₁ for effecting rotation of said arbor and parts connected
therewith.
Cindicates a tubular shaft or hollow core having passages e from the exterior to
its interior and provided with heads Cand annular flanges for supporting the
filtering material. Longitudinal flanges or ribs may also be formed on the exterior
of the core, as indicated. This core is journaled at one end in the head A2, and at its
other end is connected with the arbor B for support, and rotation therewith, preferably
by a detachable connection.
D indicates a disk or plate arranged on the spindle or arbor B and fixed to revolve
therewith by a key or pin d. The plate D is provided with recesses or holes that
engage with pins e that are fixed in the head of the core shaft c, so that said core will
revolve with the action of the arbor.
F indicates the filtering material disposed as a cylinder or covering about the

page_text: supporting core and its flanges and consisting of a tube or cylinder, preferably
of felt, supported by an outer and inner guard cylinder of wire netting as ww, or
equivalent construction, as for instance, of hexagonal or octagonal shape instead of
circular, and with a woven fabric, paper or other suitable substance in lieu of felt, or
with perforated metal instead of wire nettings at ww².
The ends of the tube or filter-felt F are each firmly secured to the peripheries of
the core heads (by means of clamping hoops or bands E (see Figure 4) which
pass around the ends of the filter and are tightened thereon by the screw 8. The
packing may be used under the ends of the filter if desired.
h
G indicates a bar or plate arranged across the end of the main cylinder A for
supporting the core C when the head A2 is removed.
Suitable stuffing boxes H H are provided on the heads A¹ A for packing the
bearing joints. Brass washers may be introduced to take the end wise wear of the
moving parts as described.
I indicates the inlet or supply pipe through which the water enters the chamber A*,
and is the stop cock for closing said inlet.
Jis the delivery pipe through which the filtered water is conveyed from the tube
and chamber F4 within the filter F, to the place of its delivery, or to suitable storage
tank T located at a convenient height above the filter; as for instance, in the attic of
the building, or so that the liquid will flow in reverse direction when the waste is
opened. The pipe is fitted to the end of the core or shaft which forms the axial
delivery for filtrate by a turning joint, and a suitable stuffing box H2 is provided to
make a tight connection while permitting the rotation of the shaft. A cock J' may
he provided in said pipe J.
Kdenotes the waste outlet, and the cock, for removing the sediment from the
chamber A. Said outlet is preferably located in the side of the cylinder when the
apparatus is used in a horizontal position but in case the apparatus is for use in
upright position, said outlet may be made at one or the other of the ends as indicated
by dotted lines as K².
:
The end of the arbor B enters and centres the core C and this, together with the
pins e forms a connection that may be easily detached, so that the filtration cylinder F
and its support core can be withdrawn from the main cylinder or case A when
desired.
In filters of large size, to withdraw the cylinder F when the apparatus is in
horizontal position, the head A² is first removed, the end of the core being supported
by the bar G. A board or guide is then inserted into cylinder A beneath the
cylinder F, after which the bar G is removed and the cylinder F drawn out along
the board or guide. For again replacing the cylinder F this operation is reversed.
In the operation of this filtering apparatus, the water or other liquid under some
degree of pressure, enters the chamber A from the pipe I passing through the
filtration cylinder F to chamber F4, and from thence by way of passages r, hollow
and pipe J to the storage tank T or place of delivery, the sediment being deposited
on the exterior of the filtration cylinder F.
To cleanse the filter, the core and filter are revolved rapidly by power applied to
the spindle B, while the discharge cock K' is open, and with either of the cocks I'
and open, closed, or partially closed to a greater or less degree, as desired.
The longitudinal ribs insure motion of the liquid within the chamber F1 as the
filter is revolved, and developes considerable centrifugal force which in connection
with the backward flow of liquid through the axial passage and filter from the storage
tank, which is preferably located above the level of the filter, serves to loosen and
wash off the mud or sediment lodged on the surface of the felt F.
This filtering apparatus is adapted for large works and factories, but it may be also
made in small sizes, and the arbor B be arranged to be revolved by hand power, as
well as by machinery.
I am aware that filtering apparatus has heretofore been made in which the filter
could be revolved, and I do not therefore herein broadly claim the feature of
revolvability in a filter irrespective of construction of the same.

page_text: 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 filtering apparatus consisting of the exterior cylinder or easing A, provided
with the inlet 1, and the hollow revolvable core C, having heads C, annular flanges ²,
radial flanges, and openings c, the tubular filtering material F supported on said
cover and connecting bands E, substantially as set forth.
2. The filtering apparatus consisting of the casing cylinder A, filtering cylinder F,
supported and distended by flanges and e³ on the revolvable core, having the axial
discharge passage c through one end thereof, the driving arbor B having a pulley
at the other end, the tank T located above the level of the cylinder, and the pipe J,
connecting said tank and discharge passage, substantially as and for the purposes
set forth.
3. In combination, substantially as herein before described, the casing cylinder, the
revolvable driving arbor B, journaled in the head A', and having an inward projecting
end provided with the plate D keyed thereto, the filtering cylinder mounted on the
revolvable hollow core-shaft C, one end of which is journaled in the head A², the other
end thereof being centered and supported by said arbor B, and detachably connected
therewith, by pipes e, fixed in the head, and entering holes in plate D, in the
manner and for the purpose set forth.
4. The combination, with the casing A, its head A, and revolvable filter cylinder,
one end of which is journaled in said head, and the other end detachably supported
on the arbor B, of a bearing bar G for sustaining said filter cylinder when the
head A is removed, substantially as shown and described.
5. In a filtering apparatus, the revolving arbor B carrying the pulley B¹, journaled
in one of the heads A¹, of the outer casing in combination with a revolvable filtering-
cylinder having a supporting core, one end of which is journaled in the opposite
cylinder-head A2, and its other end centered on said arbor and confined for rotation
therewith by detachably engaging devices, whereby the filtering-cylinder can be
withdrawn from the casing without disturbing said arbor, substantially as set forth.
Dated this 13th day of September 1887.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Patent Agents for the Applicant.