Improvements in Valve Apparatus and in the Application of such Apparatus to Filters.
Year: 1896

page_text: Date of Application, 8th Oct., 1896
Complete Specification Left, 7th Aug., 1897-Accepted, 2nd Oct., 1897
PROVISIONAL SPECIFICATION.
Improvements in Valve Apparatus and in the Application of such
Apparatus to Filters.
I, WILLIAM THOMAS WILTEMAN, of No. 7 Staple Inn, in the County of Middlesex
Patent Agent, do hereby declare the nature of this invention to be as follows:-
This invention relates more particularly to valve apparatus for use in connection
with filters, which are cleansed (when desired) by reversing the current of water
through the filter bed. In such self cleansing filters, it is desirable to have
separate pipes for the water which has passed through the filter, namely one pipe
(which may be called the house pipe) to deliver the pure water for use and a
separate pipe (which may be called the waste pipe) to carry off the wash water
after this has passed through the filter in the reverse direction. It is also desirable
to deliver into the waste pipe some of the water which has passed through the
filter in the filtering direction; because after the filter has been washed by the
reverse current, when the filtering current is restored, the first portions of water
which pass through in the filtering direction are apt to be dirty; and it is there-
fore undesirable to deliver them through the house pipe,
The present invention consists in a valve apparatus in which a four way valve
having its ports so arranged that one of said four ways can be separately put into
communication with any one of the other three ways is connected for joint opera-
tion with a three way valve having its ports so arranged that one of its ways can
be separately put in communication with either of the others and is in cuch communi-
cation with one of them in each of three of the above mentioned positions of said
four way valve. If the filtered water end of the filter is put in communication
with the four way valve through its first mentioned way, and the other three ways
are respectively put into communication with the fresh water supply pine, the
waste pipe and the house pipe, it is evident that fresh water can be let into the
filter for washing, or that the water flowing out of the filter in the filtering direc-
tion can be directed to waste, or that said water can be directed into the house
pipe for use. If the other end of the filter is put in communication with the said
three way valve through the first mentioned of its ways, and its two other ways
are respectively put into communication with the fresh water supply pipe and
the waste pipe, it is evident that fresh water can be let into the filter for filtering,
or that wash water flowing out of the filter can be run to waste. By respectively
arranging the three and four way valves so that the water passes to the filter
through the three way valve when the rour way valve occupies each of its two
filtering positions, either its house position or its waste position, and that the
waste passes from the filter through the three way valve when the four way valve
is in its third or supply position, the said valves may be manipulated together
to accomplish the filtration of the water with its delivery to the house, the washing
of the filter by the reverse current, and the delivery to waste of the water which
first passes through on the restoration of the filtering current.
This application of the valve apparatus to a filter through the specified pipe

page_text: connections is included in the invention, as well as the valve apparatus itself for
use in such relation and generally for any use to which it may be adapted.
A connection for joint operation which constitutes a special improvement
consists in having the movable ports of said four way and three way valves in the
same key and the stationary ports in the same casing.
It is also a special improvement to form branched passages in said casing, the
branches leading to stationary ports of the two valves.
The arrangement of the ports of the respective three and four way valves
circumferentially in and about a rotary key is a further special feature of
invention.
Another part or additional feature of the invention is the arrangement of ports
in a four way valve not only so that one of the ways may be separately put into
communication with each of the other three (as said above) but also so that two of
these three ways may be put into communication with each other. By connecting
these two ways with the house and the supply pipe respectively, a by-pass can be
established, for delivering the fresh water directly to the house pipe, while the
before mentioned functions of directing according to its position the fresh water to
the filtering end of the filter or the filtered water to waste or to house are not
interfered with. The valve is simply given a fourth position in which it opens
the by-pass. This four position four way valve is included in the invention
separately, and in combination with a filter, with or without a connection for
joint operation with a three way valve.
A further part of the invention consists in a four way valve in which the
stationary ports are placed ninety degrees apart and the movable ports are
arranged in pairs, the ports of each pair being placed ninety degrees or a hundred
and eighty degrees from each other and the ports of each pair being placed at
oblique angles from the ports of the other pair. Preferably the oblique angles
would be forty five degrees or a multiple thereof.
By this arrangement any of the four ways may be separately put in communi-
cation with any of the other three.
A still further part of the invention consists in a valve apparatus whereby not
only may the current of water be sent in either direction through the filter: but
it can be shut off, and the filter chamber or the pine which leads to its upper end,
or both said chamber and pipe, can be emptied. Most advantageously such
apparatus is so arrangod as to establish a by-pass and a drainage connection at
the same time.
All the abovementioned parts, improvements or combinations may be embodied
in one apparatus, and such apparatus as a whole is included in the invention, as
well as the several new parts, improvements or combinations embodied therein.
Dated this Eighth day of October 1896
tion from abroad by JOSEPH THRUSTON MANNING of 2005 Market
Street, in the City of Philadelphia, in the County of Philadelphia, and State
of Pennsylvania, one of the United States of America, Manufacturer.
Improvements in Valve Apparatus and in the Application of such
Apparatus to Filters.
I, WILLIAM THOMAS WHITEMAN, of No. 7 Staple Inn, in the County of Middlesex
Patent Agent, do hereby declare the nature of this invention and in what manner

page_text: the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention relates more particularly to valve apparatus for use in connection
with filters, which are cleansed (when desired) by reversing, the current of water
through the filter bed. In such self cleansing filters, it is desirable to have
separate pipes for the water which has passed through the filter, namely one pipe
(which may be called the house pipe) to deliver the pure water for use and a
separate pipe (which may be called the waste pipe) to carry off the wash water
after this has passed through the filter in the reverse direction. It is also desirable
to deliver into the waste pipe some of the water which has passed through the
filter in the filtering direction; because after the filter has been washed by the
reverse current, when the filtering current is restored, the first portions of water
which pass through in the filtering direction are apt to be dirty; and it is there-
fore undesirable to deliver them through une house pipe.
The present invention consists in a valve apparatus in which a four way valve
having its ports so arranged that one of said four ways can be separately put into
communication with any one of the other three ways is connected for joint opera-
tion with à three way valve having its ports so arranged that one of its ways can
be separately put in communication with either of the others, and is in such com-
munication with one of them in each of the three above mentioned positions of said
four way valve. If the filtered water end of the filter is put in communication
with the four way valve through its first mentioned way, and the other three ways
are respectively put into communication with the fresh water supply pipe, the
waste pipe and the house pipe, it is evident that fresh water can be let into the
filter for washing, or that the water flowing out of the filter in the filtering direc-
tion can be directed to waste, or that said water can be directed into the house
pipe for use. If the other end of the filter is put in communication with the said
three way valve through the first mentioned of its ways, and its two other ways
are respectively put into communication with the fresh water supply pipe and
the waste pipe, it is evident that fresh water can be let into the filter for filtering,
or that wash water flowing out of the filter can be run to waste. By respectively
arranging the three and four way valves so that the water passes to the filter
through the three way valve when the four way valve occupies each of its two
filtering positions, either its house position or its waste position, and that the
waste passes from the filter through the three way valve when the four way valve
is in its third or supply position, the said valves may be manipulated together
to accomplish the filtration of the water with its delivery to the house, the washing
of the filter by a reverse current, and the delivery to waste of the water which
first passes through on the restoration of the filtering current.
This application of the valve apparatus to a filter through the specified pipe
connections is included in the invention, as well as the valve apparatus itself for
use in such relation and generally for any use to which it may be adapted.
A connection for joint operation which constitutes a special improvement
consists in having the movable ports of said four way and three way valves in the
same key and the stationary ports in the same casing.
It is also a special improvement to form branched passages in said casing, the
branches leading to stationary ports of the two valves.
The arrangement of the ports of the respective three and four way valves
circumferentially in and about a rotary key is a further special feature of
invention.
Another part or additional feature of the invention is the arrangement of ports
in a four way valve not only so that one of the ways may be separately put into
communication with each of the other three (as said above) but also so that two of
these three ways may be put into communication with each other. By connecting
these two ways with the house and the supply pipe respectively, a by-pass can be
established, for delivering the fresh water directly, to the house pipe, while the

page_text: before mentioned functions of directing according to its position the fresh water to
the filtering end of the filter or the filtered water to waste or to house are not
interfered with. The valve is simply given a fourth position in which it opens
the by-pass. This four position four way valve is included in the invention
in combination with a filter, with or without a connection for joint operation
with a three way valve.
A further part of the invention consists in a four way valve in which the
stationary ports are placed ninety degrees apart and the movable ports are
arranged in pairs, the ports of each pair being placed ninety degrees or a hundred
and eighty degrees from each other and the ports of each pair being placed at
oblique angles from the ports of the other pair. Preferably the oblique angles
would be forty five degrees or a multiple thereof.
By this arrangement any of the four ways may be separately put into communi-
cation with any of the other three.
A still further part of the invention consists in a valve apparatus whereby not
only may the current of water be sent in either direction through the filter; but
it can be shut off and the filter chamber, or both said chamber and the pipe which
leads to its upper end, can be emptied. Most advantageously such apparatus is
so arranged as to establish a by-pass and a drainage connection at the same time
All the above-mentioned parts, improvements or combinations may be embodied
in one apparatus, and such apparatus as a whole is included in the invention, as
well as the several new parts, improvements or combinations embodied therein.
In the accompanying drawings which form part of this Specification.
Figs. 1 and 2 are views of a filter provided with valve apparatus in accordance
with the invention, the lower portion of the filter and the valve apparatus being
shown in section, the planes of section being at right angles to each other,
Fig. 3 is a section of the rear part of the valve apparatus on line ii of Fig. 2,
Figs. 4, 5 and 6 are respectively an end view, a plan view and horizontal section
of the valve apparatus detached,
Figs. 7 and 8 are views similar to Figs. 1 and 2, the valve apparatus embodying
an additional improvement (not embodied in the apparatus of Figs. 1-6, but
forming part of the invention) and the section of Fig. 7 being on line vi of
Fig. 8,
Fig. 9 is a section of the rear part of the valve apparatus on line is of Fig. 8,
Fig. 10 is a vertical longitudinal section of a somewhat modified valve apparatus,
embodying the additional improvement of Figs. 7-9, and
Figs. 11 and 12 are respectively a front and a rear cross section of another
modified arrangement.
The filter A may be of any suitable description adapted to be washed by reversal
of the current of water through it.
Referring to the valve apparatus of Sheet 1, the four way valve B (see Fig. 1)
having its ports a, b, c, so arranged as that its way 2 can be separately put into
communication with any one of the other three ways 3, 4 and 5 is connected for
joint operation with a three way valve C having its port d (which is a double port
and might be divided into two separate ports if preferred) so arranged as that its
way 6 can be separately put in communication with either of the other two
ways 7 and 8 and is in such communication in each of the three above mentioned
positions of said four way valve. The connection of the valves B and C for joint
operation may be of any suitable description which will insure corresponding
registry of the ports in the two valves; but as shown it is effected by making the
movable ports a, b, c, d, in one key, and the ways 2, 3, 4, 5, 6, 7 and 8 in one casing
the movable ports a, b, c, opening from a central chamber common to all in the
front of the key and the port d opening from a similar central chamber in the rear
of the key, and the two key chambers being separated from each other by an
imperforate partition as shown in Fig. 2. The way 6 is formed in an extension
of the key which projects through the opening in the casing.
One position of the four way valve B is shown in Fig. 1 and the corresponding

page_text: position of the three way valve C in Fig. 3. In this position the way 2 is in
separate communication with the way 5 through the ports 6 and a; and the way 6
(Figs. 2 and 3) is in separate communication with the way 7.
The second position (above referred to) of the valves is obtained by giving both
valves a short turn to the right (which is effected by one movement of the key in
which the two sets of ports are formed). This puts the way 2 (Fig. 1) in separate
communication with the way 4 through the ports b and c; and leaves unbroken
the communication of the ways 6 and 7 (Figs. 2 and 3) through the port d.
The third position (above referred to) is obtained by a further turn of the key to
the right, so as to make the port b (Fig. 1) register with the way 3 and the port a
with the way 2, the same movement making the port a (Fig. 3) register with the
way 8. In this position the ways 2 and 3 are in separate communication through
the valve B and the ways 6 and 8 through the valve C..
The filtered water end of the filter A (or in other words the end at which the
filtered water leaves the said filter) is put in communication with the four way
valve through the war 2, and the ways 3, 4 and 5 of said valve are respectively put
in communication with the fresh water supply pipe, and the waste pipe and the
house pipe. Consequently fresh water can (by proper adjustment of said valve B)
be let into the filter A through the ways 3 and 2 for washing, or the water flow-
ing out of the filtering direction through the way 2 can be directed through the
way 4 to waste or can be directed through the way 5 into the house pipe for use..
The other end of the filter A is put in communication with the three way
valve C (Figs. 2 and 3) through the way 6 which is connected with the filter by
the pipe 9; and the ways 7 and 8 are respectively put into communication with
the fresh water supply pipe and the waste pipe. Consequently fresh water can be
let into the filter through the ways 7 and 6; or wash water flowing out of the
filter can be run to waste through the ways 6 and 8. By arranging the three way
valve C as in Fig. 3 and four way valve B as in Fig. 1 and connecting them so
that they move together through equal angles water will pass into the filter A
through the valve C when the four way valve B occupies each of its two filtering
positions, either its house position represented in Figs. 1, 2 and 6, or its waste
position, which will be when the port 6 (Fig. 1) shall register with the way 2
and the port c with the way 4. In both of these filtering positions the port d
(Fig. 3) will register with the supply way 7, so that the fresh water therefrom will
have free access to the filter through the way 6 (Fig. 2) and pipe 9. The said
valves being thus connected and arranged, may be manipulated together to accom-
plish the filtration of the water with its delivery to the house (by making them
occupy the position represented) the washing of the filter by a reverse current (by
turning them 90° to the right from the position represented) and the delivery to
waste of water first passed through on the restoration of the filtering current, this
last mentioned or filtering to waste position being obtained by giving the valves
such a position intermediate the filtering to house and the washing position as
that the port c of Fig. 1 registers with the waste way 4 and the port b with the
filtering way 2, while the supply way 7 of Fig. 3 is in communication with the
filter way 6 through the left hand end of the port b.
The connection of the valves B and C for joint operation by having the movable
ports of the two valves in the same key has been referred to. The seven ways of
said valves are shown as formed in the same casing, the stationary ports being the
openings at the ends of said ways.
The casing ways might each lead to a separate outside opening; but when two
adjacent ways are for the same outside connection, as the two supply ways 3 and 7
for example (Fig. 6) or the two waste ways (Fig. 2) it is an advantage to form
such ways of branched passages, leading from an outside opening common to both
to the stationary ports appropriate to each in their respective valves.
The ports of the respective three and four way valves are in the drawings
arranged circumferentially in and about the rotary key B C.
In the four way valve B, as shown, not only may the way 2 be separately put in

page_text: communication with each of those marked 3, 4 and 5; but the ways 3 and 5 may
be separately put into communication with each other by making the port c
register with either the way 3 or the way 5. As these ways are connected with the
supply and house pipes respectively, a by-pass will be established for delivering
the water from the supply way 3 directly to the house way 5. In the by-pass
position of the four way valve, the three way valve which is connected with it
should prevent the intercommunication of its supply 7 with its waste way 8, but
it may at this time establish communication between the ways 6 and 8, or it may
establish no intercommunication.
Referring to Figs. 1 and 3, let the key BC be turned to the left to make the
port c registers with the way 3. This will bring the port in line with the way 5
and establish a by-pass. The valve C being turned the same number of degrees
to the left will have its port d closed by the metal of the casing. There will be
no intercommunication through the valve C.
If, however, the key is turned so as to bring the ports c of valve B (Fig. 1) in
line with the house way 5 then a by-pass will also be established; but the port d
of valve C (Fig. 3) having been moved through an equal arc will be found regis-
tering with the waste way 8 so that the pressure in the filter will be relieved;
simultaneously with the formation of the by-pass. Should it be desired to use the
four position four way valve without a connection for joint operation with a three
way valve, this can be done by forming the valves with separate keys, so as to be
separately manipulated.
As shown the stationary ports (or in other words the openings at the inner ends
of the four ways 2, 3, 4, and 5) of the valve B are placed ninety degrees apart;
and the movable ports are arranged in pairs, the port a and one portion of the
port b (which as before observed is double and might be divided into two if pre-
ferred) forming one pair, and the port c and the other portion of the port b forming
the other pair. Moreover, the first pair of ports are placed ninety degrees from
each other, this being the angle between the radii at the ends of which the
said ports are placed; while the ports of the second pair are placed one hundred
and eighty degrees from each other, the radii r r through the centers of these
ports being in line with each other on opposite sides of the axis of the valve. The
radii are on opposite sides of the radiil and form oblique angles with
them. Any of the ways 2, 3, 4, or 5 may therefore be put in separate communi-
cation with any other of the four, there being therefore six possible inter-
communications.
Four of these have already been explained. A fifth would be to establish the
communication of the ways 4 and 5 with each other. This could be done by
making the ports a and b register respectively with the ends of the ways 4 and 5.
It would with pipe connections as already explained open the house way 5 into the
waste way 4 and thus drain the house pipe above the level of the valve apparatus.
A sixth intercommunication would be effected by making the ports a and b
register with the ends respectively of the ways 3 and 4. With the pipe connections
already explained this position would open the supply way 3 to the waste way 4,
and water could be thereby left running to waste in order to prevent freezing
in Winter or for any other purpose.
In the valve apparatus of Sheet 2, the ports corresponding with those of the
valve apparatus of Sheet 1, are similarly marked for reference. It will be observed
that the valve B is identical with the valve B of Sheet 1 except as to the number
of degrees in the oblique angles between the radii and the radii r, the
angle in Fig. 1 between the radius and the radius being less than 45°. In
Fig. 7 the angle between the radius r and the radii and r¹ on either side thereof
is 45° and the other angles a multiple thereof. The angles between the radius 111
(in Figs. 3 and 9) and the radius are the same respectively as between the
radius r. and the radius r¹ (in Figs. 1 and 7). With oblique angles of 45 degrees
or multiples thereof the stationary ports can be made larger with the same lap than
with other oblique angles.

page_text: In the valve C of Sheet 2, an additional movable port e and casing way 10 is
provided for a purpose to be explained below; but the three casing ways 6, 7 and 8
are connected by said valve C through its port d precisely as above described;
so that the valve C in this apparatus constitutes the three way valve of the present
Specification as well as the valve C of Sheet 1.
For accomplishing all and every of the foregoing operations, it is immaterial
whether the valve apparatus is, above or below the filter chamber; but for per-
forming that part of the invention which consists in a valve apparatus whereby
not only may the current of water be sent in either. direction, through the filter,
but can be shut off and the filter chamber, or both said chamber and the pipe
which leads to its upper end, can be emptied, it is necessary that it.should be below
the filter chamber, and this position has accordingly heen represented..
. The operation of the valve apparatus of each Sheet in sending the current of
water in either direction through the filter has already been explained.
For
draining the filter chamber, the ways and ports may he as in Sheet I. To effect
this drainage it suffices to put the port e of the valve B (Fig. 1) in registry with
the filter way 2 which leads to the bottom of the filter chamber A. In this posi-
tion (since the valve C will be turned with the valve, B) the port d (Fig. 3) will
be closed by the metal of the valve casing. No water can therefore enter the filter
chamber through the valve C, and the water in said chamber can run out through.
the way 2, ports e and band waste way 4.1
The upright pine 9 which leads to the upper end of the filter can be drained
separately by placing the valve B so that the port e registers with the house way 5.1"
No water can then enter the filter through the valve B: although it may pass
through the same directly to the house way 5. In adjusting the valve B to this
cut off and by-pass position the valve C (Fig. 3) being operated therewith will
be so placed as to bring the port d in registry with the waste, way 8. The water in,
the upright pipe 9 can therefore drain away through the waste way 8.1
For draining both the filter chamber A and the unright pine 9. use is made of
the additional port e and casing way 10 with which the valve C in Sheet 2 is
provided. The way 10 leads to the bottom of the filter: and when the port
(Fig. 9) is made to register with the waste way 8, the water in the filter A (as well
as in the upright pipe 9) may run away to waste: for the valve B (Fig. 7), in this
position of the valve kev, will have its port e in registry with the supply way 3,
and while furnishing a by-pass will shut off the water supply from the filter..
A reversal of the valves of Sheet 2 from this last mentioned position (or in other.
words a movement through 180° of arc) will make port e register with way 10 and
make port e register with way 5 and thereby establish another filter-and-upright-
pine-draining position, in which also a by-pass is established.
In Figs. 7-9 of Sheet 2 (see especially Fig. 8) the two filter ways 2 and 10 are
branched from an outside opening common to both, in the threaded projection
by which the valve apparatus is secured to the filter: but in Fig. 10 they are
shown leading to separate openings, each of which is to be coupled to the bottom
of the filter.
The valve apparatus of Sheet I could he provided with the additional movable
port and casing way of Sheet 2. The war 10 might he arranged as in Figs. 7-9
or in Fig. 10 of Sheet 2: and the additional drainage port could he formed
diametrically opposite the left hand end of the port d, which is the position it
occupies in Fig. 9. The port d could however, he still further enlarged at the left.
as shown at d in Fig. 12, and the additional drainage norte be formed
diametrically opposite such enlargement. The valve B in Fig. 11 is identical with.
that of Fig. 1, and if the valve C of Fig. 12 he formed in the rear portion of the
same key. the valve apparatus as thus constructed wout serve to send the water
through the filter in the filtering direction to house, in the filtering direction to
waste and in the washing direction to waste, it would also serve to establish.a.
by-pass through which it could be sent to house without going through the filter
as hereinbefore described with reference to Sheet 1. It would also admit of the

page_text: two drainage positions above described with reference to the valve apparatus of
Sheet 1 in one of which it would drain the filter, and in another of which it would
drain the upright pipe. It would however, also admit of a third drainage position,
in which it would drain both filter chamber and upright pipe. This third drainage
position is given by placing the valve of Fig. 11 so that the port a is enough below
the house way 5 to be closed by the metal of the casing. The valve C of the
Fig. 12 will then have the additional port e in registry with the waste way 8 and
the enlargement d of the port d in registry with the filter way 10, the supply
way 7 being closed. No water can then enter the filter through the valve B; and
the water in the filter A and upright pipe 9 can drain away, that from the filter
chamber passing through way 10, port de, port e and way 8, and that from the
pipe 9 flowing through way 6, port e and way 8. A reversal of the valves so that
the port e of Fig. 12 shall register with the way 10 will accomplish the same effect.
Having now particularly described and ascertained the nature of the said in-
vention as communicated to me by my Foreign Correspondent, and in what manner
the same is to performed, I declare that what I claim is:-
1. A valve apparatus in which a four way valve having its ports so arranged that
one of its said four ways can be separately put into communication with any one
of its other three ways is connected for joint operation with a three way valve
having its ports so arranged as that one of its ways can be separately put in
communication with either of its other two ways and is in such communication
with one of them in each of the above mentioned positions of said four way valve,
substantially as described.
2. The application to and use in connection with a filter, of a valve apparatus
as hereinabove specified in Claim 1 through the following pipe connections, that
is to say the four way valve having one way connected with the filtered water end
of the filter another with a supply pipe, a third with a waste pipe and the fourth
with a house pipe, and the three way valve having one way connected with the
opposite end of the filter, another with a supply pipe and the third with a waste
pipe, so that in one position of said valves the water flows in the filtering direction
through the filter to house, that in another position thereof it flows in the filtering
direction to waste and that in a third position thereof the water flows in the
washing direction through the filter to waste, substantially as described.
3. A valve apparatus as herein above specified in Claim 1, in which the con-
nection of the four and three way valves with each other for joint operation is effected
by making the movable ports of both valves in the same key and the stationary
ports thereof in the same casing, substantially as described.
4. A valve apparatus as herein above specified in Claim 1, in which the four
way valve has one or two of its ways extended to the same outside opening or
openings to which leads or lead a corresponding way or ways in the three way
valve, thus forming one or two pairs of branched passages whereof one branch in
each pair leads to a stationary port of the four way valve and the other to a
stationary port of the three way valve, substantially as described.
5. A valve apparatus as hercin above specified in Claim 1, in which the ports
of the respective three and four way valves are mainly arranged circumferentially
in and about a rotary key, substantially as described.
6. A four way valve having its ports so arranged as that one of its ways can be
separately put into communication with each of its other three ways and as that
two of these three ways can be put in communication with each other, in combination
with a filter and a three way valve with or without a connection for joint opera-
tion of said four way with said three way valve, the said four way valve serving to
connect the filtered water end of the said filter with a house pipe, a waste pipe or
a supply pipe according as it occupies one or other of three positions and to
establish a by-pass in a fourth position, and the said three way valve serving to
connect the other end of the filter with a supply pipe or a waste pipe, substantially
as described.

page_text: 7. A four way valve in which the stationary ports are placed ninety degrees apart
and the movable ports opening from a key chamber common to them all are
arranged in pairs, the ports in one pair being placed ninety degrees of each other
and on opposite sides of the radii between the other pair, which are placed one
hundred and eighty degrees apart, the ports of each pair being placed at oblique
angles from the ports of the other pair, substantially as described.
8. In combination with a filter, à valve apparatus which is arranged below the
said filter and by which not only may the current of water be sent in either
direction through the filter, but it can be shut off from, flowing through the same
and the bottom of the filter chamber be connected with a waste way for emptying
the same, with or without at the same time connecting to waste the pipe which
leads to the upper end of said filter, substantially as described.
9. The use in the combination as above specified in Claim 8, of a valve apparatus
as therein specified which is so arranged as to establish a by-pass at the same time
that it establishes the drainage connection from the bottom of the filter chamber
or from both the bottom of said chamber and the pipe which leads to its upper end,
substantially as described.
10. In combination with a filter chamber, a valve apparatus placed below said
chamber and composed of two valves connected with each other for joint operation
and being sa arranged and connected with the said filter chamber as not only to
reverse the current through the same but when in proper position to drain the said
chamber or the said chamber and the pipe which leads to its upper end through
one of said valves, with or without at the same time establishing a by-pass through
the other valve, substantially as described.
11. The valve apparatus in each of the fornis illustrated in Sheets 1 and 2 of
the drawings, with or without the casing way 10 and movable port e-in the three
way valve C, substantially as described."
12. The application to and use in combination with filters, of valve apparatus
in each of the forms illustrated in Sheets 1 and 2 of the drawings and provided
with pipe connections as therein represented and as described with reference
thereto, said valve apparatus being placed below the filter chamber and being
with or without the casing way 10 and movable port e in the three way valve C,
substantially as described.
Dated the Sixth dow
100%