A New or Improved Filter for Domestic and similar Use.
Year: 1894

page_text: COMPLETE SPECIFICATION.
A New or Improved Filter for Domestic and similar Use.
I, HENRI CROT, of Cully, Wandt, in the Republic of Switzerland, Wine
Merchant, 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 :-
This invention relates to an improved filtering vessel, by means of which liquids
such as water, wine, beer or other liquids can be rapidly filtered or clarified, thus
rendering said vessel most suitable for kitchen and general household use.
The annexed drawing illustrates a construction of filter embodying this invention,
Fig. 1 being a vertical section and Fig. 2 a cross section thereof.
The filter consists of a vessel a, b, provided with inlet and outlet pipes and
divided by a diaphragm e into two compartments, namely the upper part a and
the lower part b. This filter, in its upper part a, contains a large number of
narrow filtering tubes d consisting of wire gauze or perforated sheet metal or
other suitable porous material.
These filtering tubes d are bag shaped and at their open ends they are fixed in
the diaphragm ein such a manner that the inner space of each of said filtering
tubes dis.in free communication with the lower part 6 of the vessel a, b. These
tubes are intended to receive a filtering layer or coating of suitable filtering
material, which layer may be provided in the following manner.
The filtering material chosen as the most suitable, for instance asbestos, in a
disintegrated or pulverized condition is intimately mixed with any suitable liquid
preferably the liquid to be filtered itself and is placed into the lower part 6 of the
vessel a, b, and subsequently this mixture is forced into the tubes d by means of
the pressure of the liquid to be filtered. This filtering medium thus settles all
round the inner walls of each of the aforesaid filtering tubes d and in this way
forms the filtering layer through which the liquid to be filtered and standing under
pressure passes from inside the tubes toward the outside.
As according to this method a hollow space always remains within the filtering
tubes from bottom to top, through which the liquid to be filtered is allowed to
readily pass, the liquid under treatment rapidly penetrates the thin filtering layer
so that the filtering process takes place very rapidly.
As morcover the filter tubes à are of a rather small diameter, a filter of this
kind requires but very little space in comparison with other filters of the same
working capacity. The filtering layer being continuously pressed closely on to the
inner surfaces of the tubes, cannot easily drop off.
As the filter tubes have ouly to sustain a distending pressure from within,
they may also be formed of coarse meshy fabric such as Handel, linen, silk or
the like.
The upper part a of the vessel a, b, may also he made to form a bowl in which
the filtrate after having passed the filter tubes d is allowed to trickle down, being
thence drawn off in any suitable manner.
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;-
An improved filter adapted to receive a filtering medium mixed with a suitable
liquid aud forced by the liquid to be filtered into narrow bag shaped tubes (d) of
uitabl
1
1

page_text: filtering layer all round the inner surface of each of the tubes (d) through which
filtering layer the liquid to be filtered may be passed from the inside toward the
outside, substantially as and for the purpose set forth.
Dated this 15th day of October 1894
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents for the Applicant.