Improvements in Filters.
Year: 1895

page_text: Date of Application, 12th Dec., 1895-Accepted, 18th Jan., 1896
Improvements in Filters.
I, THEODORE LINKE, of No. 1555 Broadway, in the City of New York, in the
County and State of New York, United States of America, Plumber, 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 invention relates to improvements in filters, and consists in a construction
embodying an external casing to be applied to the supply pipe for water and an
internal filtering media cousisting preferably of porous stone secured to the upper
end of a hollow tube, the latter having an outlet at its lower end and being slotted
at its upper end within the porous stone in order that the water to be filtered may
pass through the stone and enter the said tube and then find an exit at the lower
end of the latter. The tube carrying the porous stone through which the water is
filtered is movable vertically within the external casing and is provided directly.
below the porous stone with the aperture leading from the chamber of the casing
into said tube, the purpose of this aperture being to enable the direct passage of
the water into the outlet tube without having previously passed through the
porous stone. The vertically movable tube carrying the porous stone when
moved upward to its fullest extent will close the entrance to the casing and thus
act as a valve or faucet for completely cutting off the flow of water; and when
said vertically movable tube carrying the porous stone is lowered to its fullest
extent, the aperture from the chamber formed by the casing into the said tube
will be effectually closed and the opening for the entrance of water to said casing
will be entirely free and hence under this condition the water from the supply will
fill the said chamber within the casing and pass through the porous stone and be
filtered thereby; and when the said vertically movable tube carrying the porous
stone is in a substantially central position between the two ends of its line of
travel, the apertures in the said tube directly below the porous stone will be open
and the water instead of passing through the porous stone will flow directly through
said apertures and pass through the said tube to the exit in an unfiltered state.
The movement of the vertical tube carrying the porous stone will be effected by a
suitable hand wheel, as hereinafter explained. Within the external casing for the
filter is provided a spring having one edge in contact with the side of the porous
stone in order that during the elevation and depression of the tube and stone, the
latter will be revolved against said spring and be thereby cleansed.
The invention will be more fully understood from the detailed description
hereinafter presented, reference being had to the accompanying drawings, in
which :-
Figure 1 is a side elevation of the filter constructed in accordance with and
embodying the invention;
Figure 2 is a central vertical section of same;
Figure 3 is a top view of same with the upper section of the external casing
removed and in this figure the dotted line 2-2 indicates the section on which
Figure 2 is made;
Figure 4 is a top view of the hand wheel by which the vertical tube carrying
the porous stone may
be elevated or depressed, and
Figure 5 is a bottom view of the filter, the said hand wheel and the nut securing
the same upon the said vertical tube being omitted.

page_text: In the drawings A designates the external casing which is provided with a
removable upper section or cap B, adapted to be secured to the supply pipe for
water or other liquid. The lower end of the casing A terminates in an internally
threaded neek C into which is screwed the hollow tube D, whose upper end carries
the filtering media or porous stone E. The porous stone E is preferably of
cylindrical form and is provided with a central aperture closely fitting the upper
end of the tube D, and as shown in Figure 2, the upper end of the tube D within
the porous stone E is provided with the slots F through which the water passes
into the tube after having found its way through the porous stone. The tube D
is provided with a seat G upon which is placed a washer H and upon this washer
is placed the porous stone E, the latter being secured in position by means of the
screw I and washers J. Directly below the seat G on the tube D, the latter is
provided with the apertures K; and at its lower portion the sides of said tube D
are made square, as indicated in Figure 5 to receive the hand wheel L and permit
the latter to operate as a handle or key by which the said tube D may be revolved
and thus caused to ascend or descend within the casing A. The wheel L is
provided with the vertical rim or flange M which is adapted to pass upon the
neck C formed at the lower end of the casing A and at the center of the wheel L
is formed the square aperture N to fit upon the squared lower end of the tube D.
The wheel L is retained upon the tube D by means of the nozzle O which is
internally threaded and is screwed upon the lower end of the said tube D. The
Dozzle will engage the threads at the lower end of the tube D which are left at
the ends of the flattened sides of the latter. The form of the lower end of the
tube D is more clearly illustrated in Figure 5 and in this figure a indicates the
flattened sides upon and over which the wheel L passes and b denotes the points at
Within
which the threads are left to receive the internally threaded nozzle O.
the casing A is secured the plate spring P whose free end is bent inward to form
a scraping edge Q, as shown in Figure 3, which edge is in direct contact with
the vertical side of the porous stone E.
In the employment of the filter, the casing A will be screwed upon the ordinary
household faucet or upon' any pipe for supplying water or other liquid and the
position of the porous stone E will be regulated in accordance with the result
desired. If it is not desired to have filtered water, the tube D and porous stone E
will be given the position in which they are illustrated in Figure 2 and under
such circumstances the water will pass around the porous stone E and enter the
tube D through the apertures K and thence find an exit in an unfiltered condition.
If, however, it should be desired that the water passing from the exit be
filtered, the hand wheel L will be turned to the left to lower the tube D and the
porous stone E until the seat G closely impinges the lower surface of the casing A
where a suitable ground seat d is provided and under this condition the apertures K
being concealed in the neck C, the water from the supply entering the casing A
will be compelled to pass through the porous stone E and through the slots Fin
order to enter the tube D and hence the water escaping from the latter will be
filtered, the impurities being retained upon the external surface of the porous
stone E. Upon turning the hand wheel L toward the right until the upper
washer J has seated itself against the annular seat e, the inlet to the casing A
will be closed and under such condition the water will be entirely cut off from
the filter. The turning of the hand wheel L toward the left to lower the porous
stone E or toward the right to elevate the said porous stone, causes the tube D
and porous stone E to have a revolving motion and this motion is utilized in
connection with the plate spring P for cleansing the external sides of the said
porous stone from all the impurities which may be gathered thereon during the
operation of filtering, and hence without the employment of any separate cleansing
process the stone E is kept in a clean condition. During the revolving motion of
the stone E with the tube D the edge Q of the plate spring P remains in constant
contact with and scrapes the sides of the said porous stone. If the filter illustrated
is screwed upon an ordinary household faucet, it will be unnecessary to cause the tube D

page_text: and stone E to be elevated to their highest position for the purpose of closing the
entrance to the casing, since the water may be cut off and turned on by the usual
faucet; but when the said filter is connected with an ordinary supply pipe not
having a faucet or other valve it will be necessary in cutting off the water to
elevate the stone E to its highest position. The revolving motion of the tube D
and stone E is accomplished by the wheel L having the square aperture and acting
as a key upon the lower part of said tube, while the latter has its external threads
in engagement with the internal threads within the neck C. The construction and
operation of the filter having been fully described above, the convenience and
advantages of its use will be fully appreciated. It may be observed, however, that
the form and construction of the parts are such that the sediment removed from the
water finds no lodgement within the filter to contaminate the water; that the metal
spring scraper P has a tension against the stone E and cleans the latter by wearing
it smooth and leaving no crevice in the same for sediment or impurities to gather,
and that no delay in the flow of the water is occasioned by the presence of the
stone E when unfiltered water is desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what mauner the same is to be performed, I declare that what I
claim is :-
1. The filter comprising the casing, the vertically movable tube therein, and the
porous stone or other filtering media carried upon the upper end of said tube and
covering entrance openings thereto, combined with the wheel for elevating and
lowering the said tube and stone; substantially as set forth.
2. The filter comprising the external casing, the vertically movable tube therein
having the inlets for filtered and unfiltered water, combined with the porous stone
or other filtering media upon the upper end of said tube above the said inlets for
unfiltered water and covering the said inlets for filtered water; substantially as
set forth.
3. The filter comprising the casing having the cap section at its upper end and
internally threaded neck at its lower end, combined with the externally threaded
tube within said neck and casing, the porous stone or other filtering media upon
the upper end of said tube and covering inlets thereto, and means for raising and
lowering said tube and porous stone; substantially as set forth.
4. The filter comprising the casing, the vertically movable tube therein, and the
porous stone upon said tube and covering the entrance for water thereto, combined
with the spring scraper in contact with said stone for cleansing the same; substan-
tially as set forth.
5. The filter having the revoluble porous stone intermediate the inlet thereto
and outlet therefrom and through which the water must pass, combined with the
spring scraper in contact with said stone for cleansing the same; substantially as
set forth.
LLAנים
1005
THEODORE LINKE.
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.