Improvements in and relating to Filters.
Year: 1896

page_text: Date of Application, 19th May, 1896-Accepted, 20th June, 1896
COMPLETE SPECIFICATION.
Improvements in and relating to Filters.
1, THEODORE LINKE, of No. 1559 Broadway, in the City of New York, in the
County and State of New York, United States of America, Manufacturer, 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 the novel construction
comprising, as hereinafter fully described, the external casing having an inlet for
water, an outlet for filtered water and an outlet for unfiltered water, the revoluble
porous stone or other suitable filtering media mounted within said casing on a hollow
rod or tube which connects with the outlet pipe for filtered water, and means for
cleansing said stone or filtering media.
The object of the invention is to provide an efficient, durable and comparatively
inexpensive filter for filtering water for household purposes, and one which may be
attached to a faucet or pipe in any part of the house or be connected in the main
supply pipe for the house so as to filter the water for the entire house. The
construction is such that when a free flow of unfiltered water is desired the water
may be permitted to flow around instead of through the porous stone or filtering
media; and means are provided for keeping the porous stone in a clean, wholesome
condition.
The invention will be fully understood from the following description in connection
with the accompanying drawings, in which
Figure 1 is a central vertical longitudinal section through a filter constructed in
accordance with and embodying the invention;
Figure 2 is a vertical section of same on the dotted line 2-2 of Figure 1;
Figure 3 is a central vertical longitudinal section of a slightly modified form of
filter constructed in accordance with and embodying the invention; and
Figure 4 is a detached perspective view of the spring scraper by which the
exterior surface of the porous stone is kept in a cleansed condition.
In the drawings A designates the filter casing which may be of any suitable form.
but preferably cylindrical in cross-section. The casing A is provided upon one end
with the cap B, and also with the internally threaded inlet nozzle C for attachment
to a faucet or supply pipe, and with the internally threaded outlet nozzle D for
attachment to a pipe for the delivery of unfiltered water. Within the casing A is
mounted upon a hollow rod or tube E the porous stone F, which is cylindrical in
outline and fastened upon said hollow rod or tube E by means of the nut G which
presses the said porous stone F against the opposing head or shoulder H, although
it will be understood that the said porous stone F may be secured in place by any
suitable means. The porous stone F contains a central longitudinal aperture
within which passes the hollow rod or tube E, which within said porous stone F is
provided with the longitudinal slots I, I, through which the water after having
passed through the stone F may enter the said hollow rod or tube E and be by it
conducted to the outlet tube J for filtered water. The hollow rod or tube E
carries the porous stone F and is mounted at its outer ends so as to be revolved when
desired and thus accomplish a rotary movement of the stone F. In Figure 1, the

page_text: right hand end of the hollow rod or tube E is mounted in the packed stuffing box K
and has a squared outer end L adapted to receive a key or crank by which the said
hollow rod or tube E and stone F may be turned. The left hand end of the hollow
rod or tube E shown in Figure 1 passes through the packed stuffing box M and
connects with the delivery pipe J. The outer section of the stuffing box M
in Figure 1 is made a permanent part of the upper section of the delivery pipe J
as shown. The stuffing boxes K, M, form liquid tight joints and serve as bearings
for the ends of the tube E. The upper section of the delivery pipe J is connected
by a union N with the section of pipe O containing the valve P and leading to the
main delivery pipe Q, which is connected with the outlet nozzle D and contains
above the pipe section O the valve R; and above the valve R the main outlet
pipe Q is connected with the auxiliary or waste outlet pipe S having a valve T.
When filtered water is passing from the hollow rod or tube E into the delivery
pipe J, the valve P will be opened and the valves R, T, closed, and at such time
the filtered water will pass downward from the pipe J into the pipe section O and
thence find an exit through the pipe Q. When it is desired to draw unfiltered
water, the valve P will be closed and the valve R opened and at such time
the water entering the casing A through the inlet nozzle C will pass around,
instead of through, the porous stone F and find a ready escape downward through
the pipe Q. During the cleansing of the porous stone F the water containing the
impurities seraped from the exterior surface of the stone may be allowed to pass
downward through the pipe Q, the valve R at such time being opened, the
valves P and T closed; or, if preferred, the unclean water at such time escaping
from the casing A may be directed through the auxiliary pipe S by opening the
valve T in said pipe and closing the valve R. The purpose of the auxiliary
outlet pipe S is simply to permit of the water which escapes from the casing A
during the cleansing of the stoue F to pass through it, the said pipe S, instead of
through the main outlet Q; and said pipe S may be employed or not as may be
desired.
The means for cleansing the stone F is the spring scraper V which is composed
of spring metal secured at its end W to the inner surface of the casing A and
having at its other end the flange X which bears against the surface of the
stone F, as illustrated in Figure 2. The flange X is kept in contact with the
surface of the stone F by reason of the spring tension in the main body of
the scraper V, but in order to ensure at all times the proper contact of the flange X
with the surface of the stone F, there is provided the additional spring Y which is
formed by cutting a lip in the body of the scraper V and bending it outward to
bear against the inner surface of the casing A. The scraper V having the flange X
is enabled to scrape or cleanse the surface of the porous stone during the
revolving of said stone against the said flange X, and this, as above described, may
be accomplished by applying a key or crank to the outer end L of the hollow rod
or tube E. Upon the stone F being revolved, the flange X will scrape its entire
surface and remove all silt and other impurities therefrom, and at the same
time the water may be allowed to enter the casing through the nozzle C in order
that the impurities scraped from the stone F may be carried downward either
through the pipe Q or outward through the pipe S, as may be preferred. When-
ever it is found that the stone F is not properly filtering the water, the surface of
said stone may be quickly cleansed by simply revolving the same a few times
against the spring scraper V, which will follow the surface of the stone as it is
worn down and always be in position for immediate use.
The filter illustrated in Figure 3 differs very slightly from the filter shown in
Figure 1, and is of a form convenient of use for faucets throughout the house. In
Figure 3 the outer section of the stuffing box M is not formed as an integral part
of the outlet pipe J, and said outlet pipe J in Figure 3 is firmly fastened upon the
outlet end of the tube E passing through the aperture in the porous stone F.
The stone F in Figure 3 is revolved against the scraper V by pressure applied to

page_text: the outlet pipe J, which, at such time, acts as a crank or handle by which the
tube E and stone F may be rotated at will. The right hand end of the tube E in
Figure 3 is mounted in the nut Z which has a stud Z' seated in the bearing
recess Z" formed in the right hand end of the casing A. The casing A shown in
Figure 3 has an inlet nozzle C and an outlet nozzle D, the same as the casing A in
Figure 1, but in Figure 3 the outlet nozzle D is provided with the faucet or
valve D' through which unfiltered water may be drawn at any time and through
which also the impurities derived while cleansing the stone may escape. The
filtered water will pass from the outlet pipe J, while the unfiltered water will always
find its exit through the nozzle D. The filter illustrated in Figure 3 is provided
with the same scraper V that is present in Figure 1, and is not materially different
in any respect from the construction presented in Figure 1 with the exception of
the means provided for revolving the stone F. In both filters the supply water
enters the casing A through the inlet nozzle C and completely fills the said casing
entirely around the stone F, through which the water will pass to the tube E and
thence find its outlet through the discharge pipe J for filtered water; and when it
is desired to draw unfiltered water the pipes connected with the outlet nozzle D
will be opened in order that instead of the supply water passing through the porous
stone F it may pass around the same and find an immediate escape through the
Dozzle D and the pipe connected therewith.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The filter comprising the external casing having the inlet and outlet for water,
combined with the revoluble porous stone or other suitable filtering media mounted
upon the hollow rod or tube within said casing, and a scraper secured within said
casing and having its edge in contact with the surface of said porous stone to cleanse
said surface during the revolving motion of the stone, the said hollow rod or tube
being connected with an outlet for filtered water; substantially as set forth.
2. The filter comprising the casing having an inlet and an outlet for water,
combined with the porous stone or other suitable filtering media mounted upon
the hollow rod or tube within said casing, the delivery pipe for filtered water
connected with the end of said tube, the delivery pipe for unfiltered water connected
with said outlet from the casing, and means for cleansing the same; substantially as
set forth.
3. The filter comprising the casing having an inlet and an outlet for water,
combined with the porous stone mounted upon the hollow rod or tube within said
casing, a delivery pipe for filtered water connected with the end of said tube to
receive the water passing through said stone, the delivery pipe for unfiltered water
connected with the said outlet from the casing to receive the water passing around
instead of through said stone; substantially as set forth.
4. The filter comprising the casing having the inlet and outlet for water,
combined with the revoluble porous stone mounted upon a hollow rod or tube
within said casing, and the spring scraper secured at one end within the said casing
and having its outer edge in contact with the surface of said stone for cleansing
the latter, said scraper being provided with the supplemental spring for ensuring
its constant contact with the said stone; substantially as set forth.
5. The filter comprising the external casing having the inlet and outlet for
water, combined with the revoluble porous stone mounted upon the hollow rod or
tube within said casing, the stuffing boxes in which the ends of said rod or tube
are mounted, means for revolving said stone, and means for cleansing said stone;
substantially as set forth.
6. The filter comprising the external casing having the inlet and outlet for
water, combined with the revoluble porous stone mounted upon the hollow rod or
tube within said casing, the outlet pipe for filtered water secured to the end of

page_text: said tube and serving as a means to revolve said stone, and means for cleansing said
stone; substantially as set forth.
Dated this 14th day of April 1896.
THEODORE LINKE.
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.