Improvements in Filtering Apparatus.
Year: 1892

page_text: Date of Application, 8th Nov., 1892
Complete Specification Left, 18th July, 1893-Accepted, 19th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Filtering Apparatus.
I, JAMES HUGHES MINTO, of 32 Robarts Road, Anfield in the County of
Lancaster, Brass Founder, do hereby declare the nature of this invention to be as
follows:-
This invention relates to filtering apparatus and has been designed more
particularly for filtering water required in the manufacture of aërated waters,
though it must be understood that the apparatus is not limited to that purpose as it
may also be used as a domestic filter for filtering spirits and for various other
purposes. One of the objects of my invention is to provide means whereby the
filter may be thoroughly cleansed and purified with rapidity but without having to
take the apparatus to pieces whereby it is better adapted to be cared for by
unskilled persons.
In carrying my invention into effect, the apparatus is composed of a strong box
or chamber of any convenient shape, preferably cylindrical, or as nearly cylindrical
as practicable. This chamber is provided with feed and delivery pipes, and inside
I provide a hollow cylindrical vessel connected with the feed pipe and formed with
a strainer at the ends in order to allow a free passage for liquid to flow through..
This vessel is filled with charcoal or other suitable material, and round the outside.
thereof and between it and inside the walls of the chamber, I provide a cylindrical.
filtering frame composed of two perforated metal cylinders or their equivalent, one:
inside the other, and between these cylinders, I place a layer of asbestos or other
suitable filtering material. Sufficient space is left between this filtering frame and.
the internal vessel to permit the liquid to pass between and to percolate through the
filter frame. The feed pipe for the liquid is provided with a valve for governing.
the admission of water for filtering or for cleansing, and governing also the outflow
of filtered water, or wash-water. This valve is of peculiar construction being
formed with conduits and ports to permit water when in filtering position, to flow
from the supply into the filter and from thence to the delivery pipe; or when in
position for washing the filter, to flow from the supply in the reverse direction:
through the filter to the waste or drain conduit, thereby washing the filter beds, and.
finally as a secondary washing to flow from the supply through the filter with the
object of removing any sediment which may remain on the asbestos in the first.
washing, the wash-water escaping through the valve aforesaid to the drain conduit..
This latter operation is effected by the filtered water as the water is filtered by the
charcoal before washing the asbestos. A disc may be provided which may contain
indications at proper points such as
" and 'so.
filter," "first-wash," "second-wash
on; also an index finger so that if the index finger be brought over the word
"filter," the valve is in position to admit water and filter the same; or if the index.
finger is over the word "first-wash," the valve is in position to pass water through.
the filter in a reverse direction.
The mode of action is as follows-
$6
The valve aforesaid being opened to admit the water and the waste valve closed,.
the feed is fed into the filter and passes through the inner cylinder containing the
charcoal until it arrives at the opposite end. In course of its passage it has been.
filtered of all but the very finest solid material and having been thus far filtered, it
is directed into the space between the inner cylinder and the filter frame; the water
then percolates through the asbestos in the frame into the box or chamber and is
discharged through the filtered water outlet. After a time, the charcoal and
asbestos will get somewhat clogged with dirt and this clogging will increase until
the water will have difficulty in passing through. In order to clean the filter when

page_text: thus clogged, the filtered water outlet is closed and the feed valve is turned into its
second position, whereby the feed water is passed into the filter in the opposite
direction to that in which the water flows when being filtered. The impurities are
removed from the asbestos, carried through the charcoal together with the impurities
which have collected in the charcoal, and the wash water escapes by passing through
ports in the feed valve and out through the drain conduit. If now the feed valve
is again turned, water is again passed through the filter in the reverse direction to
the first operation of cleansing in order to remove any sediment which remains on
the asbestos from the first cleansing. This water, to effect this final purification, is
passed through the charcoal and is therefore practically filtered before coming in
contact with the asbestos, hence filtered water alone is used to effect this final
washing. By removing the cover of the box or chamber, the internal charcoal.
cylinder and the filtering frame can be entirely removed for the purpose of renewing.
the material.
Dated this 7th day of November 1900
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Filtering Apparatus.
I, JAMES HUGHES MINTO of 32 Robarts Road, Anfield, in the County of
Lancaster, Brass Founder, 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 filtering apparatus and has been designed more
particularly for filtering water required in the manufacture of aërated waters,
though it must be understood that the apparatus is not limited to that purpose, as
it may also be used as a domestic filter for filtering spirits and for various other
purposes. One of the objects of my invention is to provide means whereby the
filter may be thoroughly cleansed and purified with rapidity but without having to
take the apparatus to pieces, whereby it is better adapted to be cared for by
unskilled persons.
The manner in which I prefer to carry my invention into effect will be best
understood from the following description, reference being had to. the accompanying
drawings, in which :-
Figure 1 is a vertical section, partly in section, of the apparatus:
Figure 2, a vertical section of the valve, on a plane at right angles to the plane
of section of the previous figure :
Figures 3 and 4, cross sections through the valve plug on lines a b and c d of
previous figure:
Figures 5, 6 and 7, vertical cross sections of the valve on line ab (Figures 2
and 9) showing the various positions of valve, namely, Figure 5 for filtering,
Figure 6 for first cleaning, and Figure 7 for second cleaning:
Figure 8, a vertical cross section on line c d (Figures 2 and 9):
с
Figure 9, a top plan of the valve, Figures 5, 6 and 7: and
Figure 10, an elevation of the dial and iudex finger.
Referring to these figures, the apparatus is composed of a strong box or
chamber A of any convenient shape, preferably cylindrical, or as nearly cylin-
drical as practicable. This chamber A is in communication with the inlet B
and delivery C, and inside I provide a hollow cylindrical vessel D connected
with the inlet and formed with a strainer E at the end in order to allow a free
passage for liquid to flow through. This vessel is filled with charcoal or other
suitable material, and round the outside thereof and between it and the inside
walls of the chamber, I provide a cylindrical filtering layer of asbestos F, or

page_text: other suitable filtering material. Sufficient space is left between this filtering
layer F and the internal vessel D to permit the liquid to pass between and to
percolate through the asbestos. G is a valve for governing the admission of
water for filtering or for cleansing, and governing also the outflow of wash-water..
This valve G is of peculiar construction, being formed, together with the valve.
plug 9, with conduits and ports to permit water, when in filtering position
(Figure 5) to flow from the supply B into the filter and from thence to the
delivery pipe C; or, when in position for washing the filter (Figure 6), to flow
from the supply B in the reverse direction through the filter to the waste or
drain conduit H, thereby washing the filter beds, and, finally, as a secondary
washing, (Figure 7) to flow from the supply B through the filter with the:
object of removing any sediment which may remain on the asbestos F in the:
first washing, the wash-water escaping through the valve conduit g' to the drain.
conduit H. This latter operation is effected by filtered water, as the water is.
filtered by the charcoal before washing the asbestos F. By means of this
improved valve, therefore, the circuit can be altered at will, by simply turning
the handle M attached to the valve. A dial I may be provided on the plug g,
which may contain indications at proper points, such as "shut off," "filtering,"
"1st cleaning," "second cleaning;' also an index finger J, whereby, if the
handle is rotated so that the index finger points to the word "filter," the valve
is in position to admit water and filter the same; or, if the index finger points
to the "1st cleaning," the valve is in position to pass water through the filter
in a reverse direction, and so on.
The mode of action is as follows:-
The valve Gaforesaid being opened to admit the water, and the waste
conduit H closed (Figure 5), the feed water is fed into the filter and passes
through central pipe K and strainer E into the inner cylinder D containing the
charcoal in the direction of arrows
In course of its passage, it has
been filtered of all but the very finest solid material, and, having been thus far
filtered, it flows through openings d into the space between the inner cylinder D
and the asbestos F: the water then percolates through the asbestos into the
box or chamber A, and is discharged through the filtered water outlet C. After
a time, the charcoal and asbestos will get somewhat clogged with dirt and this
clogging will increase until the water will have difficulty in passing through.
In order to clean the filter when thus clogged, the filtered water outlet C is
closed and the feed valve G is turned into its second position (Figure 6),
whereby the feed water is passed into the filter in the opposite direction to
that in which the water flows when being filtered. The impurities are removed
from the asbestos F, carried through the charcoal together with the impurities
which have collected in the charcoal, and the wash water escapes by passing
through ports in the feed valve and out through the drain conduit H. The
course of the water during this second cleaning is shown by arrows, thus
If now the feed valve G is turned into its third position (Figure 7) water is
again passed through the filter in the reverse direction to the first operation of
cleansing in order to remove any sediment which remains on the asbestos F
from the first cleansing. This water, to effect this final purification, is passed
through the charcoal in direction of arrows
and is practically filtered
before coming in contact with the asbestos, hence filtered water alone is used
to effect this final washing. By removing the cover L of the box or chamber A,
the internal charcoal cylinder D and the asbestos F can be entirely removed for
the purpose of renewing the material.
I have described one way in which my invention may be carried into effect, but
it is obvious that various alterations may be made without departing from the
invention. It may be noted here, for example, that the strainer E could be
arranged at both ends, also, instead of the asbestos cylinder F being used, a
cylindrical filtering frame may be employed, composed of two perforated metal
cylinders or their equivalent, one inside the other, and between the cylinders, the

page_text: layer of asbestos or other suitable filtering material is placed. A filtering frame
thus constructed is stronger than the asbestos used alone.
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. In a filtering apparatus, the improved arrangement whereby the filter may be
thoroughly and quickly cleansed of impurities without having to take any part of
it to pieces, substantially as described.
2. In a filter, the arrangement, in combination with the chamber A of the inner
hollow vessel D, strainer E, pipe K, and annular filtering frame or layer F located
round the outside of D substantially as and for the purpose described.
3. The construction or arrangement of valves G substantially as and for the
purposes described, whereby, in a filtering apparatus, the circuit of the liquid can
be altered or reversed at will or the supply completely cut off, by simply turning
the hand lever M attached to the valve.
4. The special arrangement of the ports and conduits in the valve G substantially
as and for the purpose set forth.
5. The general combined arrangement or construction of parts forming my
improved filtering apparatus substantially as set forth.
Dated this 15th day of July 1893.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.