An Improved Filter.
Year: 1894

page_text: Date of Application, 28th May, 1894-Accepted, 30th June, 1894
COMPLETE SPECIFICATIOA
An Improved Filter.
1 HANS AUGUST WILHELM HÜLSMANN, Sole Proprietor of the Firm of Eugen
Hülsmann, formerly Carl and Gustav Harkort, Earthenware Manufacturer, of
Altenbach near Wurzen, Saxony, Germany 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 consists in certain improvements in filters by which they differ
from previous constructions principally in the arrangement of an easily removable
filtering body, so designed or made that the spaces which contain respectively the
filtered and the unfiltered matter, are entirely shut off from one another.
This arrangement is hereinafter described and represented in the annexed
drawing, in which Fig. 1 is a vertical section and Fig. 2 a horizontal section of the
improved filter.
The filter-vessel which is made in any suitable size and in various forms is at a
suitable place on the inner surface of its wall provided with a supporting ledge t or
with appropriate supporting projections in place thereof.
Upon this supporting ledge or upon these projections respectively rests the
filtering body e, which may be composed of block carbon, or of a receptacle filled
with a filtering material and provided with porous floor and walls.
The filtering body, the form of which is adapted to the cross sectional area of the
filter vessel, is surrounded by an elastic string u preferably of indiarubber, this
forming the packing between the filtering body and the inner surface of the wall of
the filter vessel.
By the aid of said string, the space containing the unfiltered liquid is shut off
from that receiving the filtered liquid.
The space
is provided with an outlet cocks and an appropriate air-vent.
channel P is arranged for the spacer which either passes up in the wall of the
filter-vessel or may be made in any other suitable manner.
To render the filtering body capable of being readily taken out, the before
mentioned packing string is provided with a cord or cords o by the aid of which the
packing string and the filtering body can be easily lifted out.
The upper part of the filter vessel is closed by a cover or the vessel may be
placed in communication with a suitably shaped water supply pipe or the like.
The method of manufacturing the filter may vary according to the quantity of
liquid to be filtered in a certain space of time.
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 having inside a filter vessel, a filtering body v of any suitable.
material adapted to rest upon a ledge or projections in the said vessel, this filtering
body being surrounded by an indiarubber ring or any analogous string to serve as a.
packing medium between the spaces above and below said filtering body, furthermore
an air vent channel p for the lower space and means for withdrawing the filtering:
body with its ring u substantially as and for the purpose set forth.
Bated + Vxth day of
Nav LX94
Hinted Xth dov
R. HADDAN,
Of the Firm of Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, W.C.,.
Agent for the Applicant.