An Improved Water Filtering Apparatus.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
An Improved Water Filtering Apparatus.
I, JOSEPH LEIMANN, Inventor, of 20, Rue de la Glaciere, Paris, France, do
hereby declare the nature of this invention to be as follows:-
This invention relates to an apparatus for filtering drinking water which can
be placed directly on domestic water pipes, either high or low pressure. I prefer
to place it on the pipe just above the kitchen sink so that the apparatus may
give filtered water for drinking purposes and unfiltered water for common use.
The apparatus consists of an ordinary service cock, a hemispherical shell pro-
vided upon its interior wall with a filtering material (this shell has at its upper
end a screwed tubular part which is screwed upon the pipe), a tubular part
arranged at the interior of the aforementioned tubular part and which terminates
at the interior of the shell in a head pierced by a number of small holes for the
passage of the water into the shell, and a small cock, arranged at its lower end,
for running off the filtered water.
The shell is closed by a disc which is screwed in place and which possesses a
central tubular part screwed on the inside and upon which the first named cock
is screwed.
The filtering material consists of spun asbestos and is woven specially for the
purpose of making a very thick and compact tissue which swells upon contact
with water to such an extent that no organic body or matter can penetrate it.
This asbestos tissue is made in the shape of a spherical cap and placed in the
apparatus. The circumferential edge of this cap is tightly pressed by the afore-
mentioned disc.
When the small lower cock is opened the water from the water pipe passes
through the filtering substance and through this cock; filtered water is thus
obtained. If the other cock is opened the water from the supply pipe passes
directly through it and runs off without being filtered.
iated this 24th day of April 1899.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.
I, JOSEPH LEHMANN, of 20, Rue de la Glaciere, Paris, France, Inventor, de
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 an apparatus for filtering drinking water, which can

page_text: be placed directly on domestic water pipes, either high or low pressure. I prefer
to place it on the pipe just above the kitchen sink so that the apparatus may
give filtered water for drinking purposes and unfiltered water for common use.
In order that my said invention may be properly understood I have hereunto
appended an explanatory drawing showing the apparatus.
The apparatus consists of an ordinary service cock a, a hemispherical shell b
enclosing the filtering material c (this shell has a screwed tubular extension d
which is connected by the coupling g to the water pipe), a tubular piece e
inserted at the interior of the aforementioned extension and which terminates, at
the inside of the shell, in a head e¹ pierced by a number of small radial holes e
for the passage of the water into the shell, and a small cock f at the lower. side
for running off the filtered water.
The shell is closed by a disc h which is screwed in place and which possesses
a central tubular extension i, screwed on the inside, and into which the cock a is
screwed.
The filtering material c consists of spun asbestos and is woven specially for the
purpose of making a very thick and compact tissue which swells upon contact
with water to such an extent that no organic body or matter carried by the
water can penetrate it. The asbestos tissue is not liable to suffer from the action
of water.
This asbestos tissue is made in the shape of a hemi-spherical cup and placed
in the apparatus. The circumferential edge of this cup is, as shown, tightly
pressed and held by the disc h.
The
When the small cock f is opened the water from the supply pipe enters the
shell 6 by the holes e² and filters slowly through the filtering material c there-
after passing out by the cock f. The impurities are deposited upon the interior
surface of the material c. When the cock f is closed and the cock a opened the
water runs at full presssure through the apparatus and out by the cock a.
water jets passing through the radial holes e impinge upon the surface of the
filtering tissue c and sweep away any impurities collected thereon from the last
filtration so that the filtering medium is cleansed. As this cleansing operation
takes place each time the cock a is opened for the passage of water for ordinary
use the apparatus never becomes choked.
Instead of using asbestos tissue any other well known and suitable water filter-
ing substance can be used in the apparatus. For instance natural or artificial
porous earths, porcelains, or biscuit wares, or other bodies at present employed
for the filtration of water may be used. The filtering substance would, of course,
be made or moulded into the form of a cup such as c so as to fit into the apparatus.
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 consider novel and desire to claim is:-
The improved construction of water filtering apparatus adapted for application
to domestic water pipes and which can be utilized to supply, as desired, either
filtered water for drinking purposes or unfiltered water for common use, substan-
tially as herein before described.
Dated this 24th day of January 1900