Improvements in Water Filters for Accumulating and Cooling Filtered Water and Scouring the Filter by Means of the Supply and Preventing Exhaustion of the Filter through the Supply Pipe.
Year: 1898

page_text: Date of Application,
26th Apr 1898
Complete Specification Left, 23rd Jan., 1899-Accepted, 18th Mar.,
1899
Date of APP
Complete Specification Left, 23rd Jan., 1899-Accepted, 18th Mar.,
1899
PROVISIONAL SPECIFICATION.
Improvements in Water Filters for Accumulating and Cooling
Filtered Water and Scouring the Filter by Means of the Supply
and Preventing Exhaustion of the Filter through the Supply
Pipe.
I, EMIL TYDEN, of the City of Chicago, County of Cook, and State of Illinois,
United States of America, Mechanical Engineer, do hereby declare the nature of
this invention to be as follows:-
-
same
In carrying out my invention, I construct a base adapted to support both a filter
and a reservoir adjacent thereto, which may have communication with the filtered
water chamber of the filter, such communication being most conveniently provided
in the base. The filter is preferably cylindrical, and is partitioned by a cylindrical
filtering element, such as a porous tile, and within this filtering cylinder, there is
a central tube or pipe, so that there are formed three chambers in the filter, the
innermost being the cavity of said central pipe; the next being the annular
same and the filtering cylinder,
chamber around such pipe between the
and the third being outside the filtering cylinder between the
A cap is provided which connects
and the outer wall or shell of the filter.
the upper end of the central pipe with the upper end of the filtering cylinder, and
closes at the upper end the annular chamber between said pipe and cylinder, said
cap, however, being centrally apertured to afford communication from the central
pipe to the space above the cap in the outer shell, thus making communication
from the pipe to the outer annular chamber which exists between the filtering
cylinder and the outer shell. Water is admitted through the base into the lower
end of the central pipe, and thence passes at the upper end of the pipe into the
outer annular chamber between the filtering cylinder and the shell, and this
chamber communicates at the bottom with a cavity in the base which is provided
with a cock for drawing water, and from this cock it will be manifest that only
unfiltered water will be drawn. The space between the outer surface of the filter-
ing cylinder and the inner surface of the outer shell is very narrow, so that the
water drawn from the cock mentioned, passing through this very thin annular
chamber, has a tendency to scour the walls, and particularly to scour the outer wall
of the filtering cylinder, and thus remove from it the residuum which may have been
deposited upon it in the previous process of filtering. The chamber between the
0 central pipe and the filtering cylinder will manifestly contain filtered water, and is
termed the "filtered water chamber." From this chamber a passage leads through
the base into the reservoir, but a small pipe is connected at the mouth of said
passage in the filtered water chamber, and extends up near the top of said chamber,
so that the communication from the filtered water chamber to the reservoir leads
35 from the upper part of the former into the lower part of the latter. From the same
chamber, at a point as remote as convenient from the point of communication of
said chamber with the passage which leads to the reservoir, a direct passage leads
to a cock for drawing filtered water.

page_text: It will be noticed, upon considering the structure thus described, that, being con-
nected with a supply of water, the outer thin annular chamber of the filter will
be filled and the water will filter through the filtering cylinder into the second or
filtered water chamber until the same is full to the upper mouth of the pipe therein,
which forms part of the passage leading through the base into the bottom of the
reservoir, and that, as the water continues to filter through the tile into the filtered
water chamber, it will flow out through said pipe and passage into the reservoir
until the latter is filled, except such space at the top as will be occupied by the
air originally contained in the reservoir, which will be compressed by the pressure
of the water. From this construction, it will be understood that when the water
is drawn through the cock leading from the filtered water chamber, its place is
supplied immediately by water from the reservoir which is forced out by the
reaction of the compressed air so long as the water is drawn faster than it can
filter through the filtering cylinder from the supply. I contemplate that water
will be frequently drawn from the cock which leads from the outer chamber for
ordinary purposes not requiring filtered water, and that this water, coming from
the source of supply, will be cool, and will not only scour the surface of the filter,
keeping it in perfect condition for its work, but will also cool it and cool the filtered
water standing therein, and that, when filtered water is drawn, it will be obtained
directly from the filtered water chamber which has been thus kept cool, and the
accumulated supply in the reservoir, which may have become warm by standing,
will be passed back through the cool filtered-water chamber before passing out
through the cock, and will thus be cooled again to somewhat near the temperature
of the supply, thus affording,-what is difficult to obtain in a filter without the
employment of refrigerating apparatus, viz.: cool filtered water.
In order to prevent the water in the reservoir from passing back into the filtered
water chamber whenever water is drawn from the latter to the exclusion of water
which might, during such drawing, pass through the filtering cylinder to supply
the vacancy,
I may provide a valve operated by a float in the reservoir and which
will be held closed when the latter is full to a limit predetermined by the length
of the float connection, so that when the reservoir is full, it will require some
suction to withdraw the water from it, and a little delay will thus be caused to
afford the water opportunity to pass through the filtering wall in preference to
coming from the reservoir.
In order to prevent the filter from being emptied when the water is drawn from
a lower point in the system of supply pipes to which it is connected, I design to
provide a check-valve adapted to seat downwardly to close the passage through the
cap from the central pipe to the outer chamber. This valve, therefore, will open
freely to allow the water to pass from the central pipe through the cap into the
outer chamber, but will close upon any movement of the water in the opposite
direction such as would result from an exhaustion of the water supply at a point
below the filter.
The vital features of my invention are:-First, in general, the provision of a
reservoir connected with the filtered water chamber in such manner that water
drawn from the latter is supplied from the former, and water supplied by filtering
to the latter accumulates in the former; and in connection with this general feature,
the specific feature above pointed out, that the unfiltered water chamber, being
provided with a cock through which water may be drawn from the source of supply
without filtering, is so situated with respect to the filtered water chamber,―as,
by encompassing it,--that the drawing of unfiltered water tends to keep the filtered
water chamber cool. The check-valve, which prevents the emptying of the filter
when the water is drawn from the supply system at a lower point, such check valve
being interposed between the unfiltered water chamber of the filter and a pipe
which supplies it at the top, constitutes another feature. And a fourth feature of
importance is the construction which results in the formation of a thin annular
unfiltered water chamber, from which unfiltered water may be drawn with the

page_text: effect of scouring the surface of the filtering element on the side at which the water
enters such element.
Improvements in Water Filters for Accumulating and Cooling
Filtered Water and Scouring the Filter by Means of the Supply,
and Preventing Exhaustion of the Filter through the Supply
Pipe.
I, EMIL TYDEN, formerly of the City of Chicago, County of Cook, State of Illinois,
out now of the City of Hastings, County of Barry and State of Michigan, in the
United States of America, Mechanical 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:-
The purpose of this invention is to provide an improved filter for domestic use,
which shall have a reservoir in which filtered water may be accumulated and from
which it may be returned automatically to the filtered chamber whenever water
is drawn for use from the latter, and in which the drawing of unfiltered water
cools the filtered water and scours the filter, and in such a filter it includes means
for preventing the exhaustion of the filter by back-flow through the supply-pipe.
In the drawings,
Fig. 1 is a front elevation of my improved filter.
Fig. 2 is a vertical section axial with respect to the two cylinders and connecting
duct.
Fig. 3 is a plan of the base fitting on which the cylinders are mounted.
Fig. 4 is a horizontal section at the line 4-4 on Fig. 2.
Fig. 5 shows the filter mounted by connection with a water-supply-pipe.
A is a cast fitting constituting the base of my filter. It is provided with pipe
connections A and Ab, the former for attachment to the water supply pipe and
the latter to afford connection for a discharge faucet. On the upper side it has
two circular flanges A and Ad, interiorly threaded and adapted to receive the water
cylinders O and Q respectively. In the base A are formed two cavities P and S,
which open inwardly, and thereby communicate with the lower ends of the
cylinders O and Q respectively. Concentric with the flange A, into which the
cylinder O is screwed, is an annulus Aª, seated with intervening packing a° on the
base A, and having a flange A, within which the filtering cylinder H is retained,
being stepped on a packing gasket 0°, lodged upon the upper surface of the web of
the fitting A, said annulus A operating practically as if it were a flange or upraise
from the base A, and within this annulus A° is a third annulus which is a flange
or boss around the margin of the opening Pa into the chamber P, and into this
a
a pipe G. V is
cap whose
flange or boss A, there is screwed
marginal flange V receives the upper end of the filtering cylinder H,
a packing gasket Ob being interposed between the end of the cylinder H and its
seat on the cap. Centrally disposed with respect to the cap, depending from its
under side, is a hollow hub Vb, which, at its lower end is threaded, and thereby
adapted to be screwed onto the upper end of the pipe G, and at the center of the

page_text: cap, it has an aperture V. In the upper web of the fitting A, inside the annulus Aº,
is an opening K", leading by way of the passage K to the chamber S, and at this
opening K, there is connected a pipe I opening between the pipe G and the filtering
cylinder H. Outside the annulus A, in the upper web of the fitting A, is an open-
ing R, which leads by way of the passage R to the faucet connection Ab. Between
the annulus A and flange A', a passage T opens into the chamber F, said passage
being extended vertically through the fitting A without direct communication with
any other of the passages in said fitting, and at the lower end of said passage T is
connected a pet-cock E. Considering the structure thus described, it will be noticed
that when the filter is attached to the water supply pipe, the water entering at A" may
pass through the chamber l' up through the pipe G, and thence through the
aperture in the cap V, it may pass into the annular chamber W, between the
cylinder and the filtering cylinder H, and from said chamber W, it may pass
by way of the passage R through the discharge cock 1), or said discharge cock
being closed, it will pass through the wall of the filtering cylinder H, and occupy
the annular chamber F within said filtering cylinder and outside the pipe G, and
may be drawn from the chamber F by the pet-cock E, or it may pass also, by way
of overflow, out of the top of said chamber F, following through the pipe I and
passage K into the chamber S, and thence up into the reservoir or storage
cylinder Q. The entrance to the reservoir Q is controlled by a valve L, seating
upwardly on the bottom Q" which is sprung upward from the horizontal web of
the fitting to form a valve chamber under said bottom. A turret Q is provided
at the center of the bottom to afford guidance for the stem L of the valve L, and
to this stem is connected a float N, by means of a chain M, the length of which
permits the float to rise nearly to the top of the cylinder Q, and when at its limit,
to hold the valve L seated upwardly. Lb is a cup which receives the chain and
affords lodgment for the float N when the latter is at the lowest point. In the
chamber which is formed in the hollow hub Vb of the cap V, there is a valve U,
adapted to seat over the upper end of the pipe G,-that is, at the lower end of the
chamber in the hub Vb. This valve has a stem U", which extends out through
the opening Ve in the cap, and is suitably guided in a yoke or staple Vd, which
. springs from the top of the cap, and overhangs the opening Ve for the purpose of
affording guidance to the valve stem. The other end of the stem below the valve U
is bent at Ub, so that it obtains guidance in the pipe G. The purpose of the valve
is that if the water should be drawn from the supply system at some point lower
than that at which the filter is attached, the outlet thus opened, being sufficient to
exhaust the entire supply, whereby the flow at such lower opening would tend
to draw the water out of the filter, the reverse movement of the water thus induced,
operating upon the valve U, will seat it downward over the end of the pipe G,
and cause it to retain the water in the filter. The stem U of the valve is of such
length that its upper end is stopped against the cap B when the valve U is at a
position which permits the water to flow around it and out through the aperture V
In the use of this filter, water for drinking or any other purpose for which the
filtered water is desired, will be drawn through the pet-cock E. This pet-cock,
taking the water from the lowest point of the annular chamber F inside the filter-
ing chamber H, will draw the coldest water, and that which was last filtered,
because the chamber F, becoming filled to the top of the pipe I, the overflow will
constantly pass over into the reservoir Q, and water is carried from the reservoir
only by the same passage, that is, by passing back through the overflow pipe
into the annular chamber F and out through the pet-cock. Water for other use
not requiring it to be filtered is drawn through the cock D, and such water being,
in domestic use, always drawn in such larger quantity than that which is filtered,
there will be a constant cooling effect experienced by reason of such water passing
all around the filtering cylinder Hin comparatively large quantity, tending thus to
cool the water which may have been standing sometime in the chamber F, so that
the water drawn through the pet-cock E flowing, during the time the cock is open,

page_text: vater
t a greater rate than it can permeate the filter, will tend to create a
he upper part of the chamber F, which will be filled by the return. of th
rom the reservoir through the pipe I, but before this water, thus returned from
he reservoir, reaches the bottom of the chamber F, so as to be ready to pass out
hrough the pet-cock, it will be exposed for a considerable time to the cooling
ffect of the frequently changed water in the outer space W around the filtering
ylinder H, which, entering directly from the supply-pipe, may be presumed to be
colder than that which has been standing for some time in the reservoir Q. In
practice in domestic use, when the supply water is reasonably cool, the filtered water
drawn through the cock E will at all times be nearly as cool as if it were drawn
directly from the supply pipe, and at the same time, the supply maintained in the
reservoir Q makes it possible to draw rapidly from the pet-cock without emptying.
the chamber F, because the latter is constantly supplied from the reservoir, the
reservoir being refilled by filtering in the intervals between drawings from the
pet-cock, the supply drawn from the cock D being compelled to pass through the
narrow cylindrical passage between the filtering cylinder H and the outer case O,
and the size of the faucet being such as to permit it to flow freely, will operate to
scour the outer surface of the filtering cylinder and carry off the deposit due to
filtering.
In Fig. 5, there is shown a tee D* interposed between the cock D and the filter,
for the purpose of connecting the pipe Db, which may extend to any other part of
the house where water may be drawn-as to a bath-room,-so that not only the
water drawn at the faucet D, but all the water drawn at any point in the house may
pass around the cylinder H, and assist in keeping it cold.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. The association with a filter of a reservoir into which the water passes from
the filtered water chamber, and from which it may pass back into such chamber
whenever water is drawn from the latter, said filtered water chamber being pro-
vided with suitable means for drawing water therefrom.
2. In a filter, in combination with a filtered water chamber having a cock for
drawing water therefrom at the bottom; a reservoir communicating with the
filtered water chamber at the top of the latter, whereby the filtered water from said
chamber overflows into the reservoir and returns by the same passage when the
water is drawn from the bottom of the chamber.
3. In a filter, in combination with the water inlet pipe, a check valve adapted
to be seated by back flow through said pipe to prevent the emptying of the filter
as described.
4. In a filter, in combination with the central supply pipe G, the filtering
cylinder H outside the same and the outer cylinder O, whereby there are formed
two annular chambers F and W located respectively between the inner pipe and the
filtering cylinder and between the filtering cylinder and the outer cylinder; the
cap V which closes the chamber at the top having a water-way through it
5 leading from the pipe G to the outer chamber W, and a faucet leading from the
lower end of said outer chamber W, whereby the drawing of water from said faucet
scours the outer surface of the filtering cylinder.
5. In a filter, in combination with the water inlet pipe, the filtering cylinder
and the outer cylinder, the cap which closes the upper end of the chamber between
the inlet pipe and the filtering cylinder, and which has a central water-way afford
ing communication from the pipe to the space outside the filtering cylinder; a
reservoir communicating with the upper part of the space inside the filtering
cylinder and having no communication with the space outside the same; a drain
cock leading from the part of the space inside the filtering cylinder, and a faucet
65 leading from the lower part of the space outside the cylinder, all combined and
operating for the purpose set forth.

page_text: 6. In a cylinder, in combination with the central inlet pipe G, filtering cylinder H
and outer cylinder 0 and their respective intervening chambers F and W; the
cap. V which closes the upper end of the chamber F, said cap having a hollow hub
constituting a valve chamber having a lower port and connected at said port to
the upper end of the pipe, said chamber having an upper port through the cap, and
the valve U lodged in said chamber and adapted to seat downwardly at the lower
port thereof, and having its stem extending up through the lower port, and the
cap 1 of the outer cylinder arranged to stop the end of the stem when the valve U
is intermediate the upper and lower ports of the valve chamber.
Dated this 23rd day of January 1899.
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, W.C., London.