Improvements in Hollow Porous Filtering-cylinders for use in Filtering-vessels.
Year: 1892

page_text: Date of Application, 22nd Feb., 1892
Complete Specification Left, 12th Oct., 1892-Accepted, 12th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Hollow Porous Filtering-cylinders for use in
Filtering-vessels.
I, Dr. HERMANN NORDTMEYER, of 18, Speicherstrasse, Celle, in the Empire of
Germany, Gentleman, do hereby declare the nature of this invention to be as
follows:-
My invention relates to hollow porous filtering-cylinders for use in filtering-
vessels.
Such filtering cylinders as heretofore made, which require to be frequently
cleaned, are difficult to handle on account of their fragility.
My invention consists in strengthening the cylinder by means of a stiffening
tube or rod or a tightened wire, chain or cord passed lengthways through the
cylinder. The said rod, tube, wire, chain or cord in certain cases also serves to
facilitate the handling or turning of the parts in the filtering vessel for cleaning
purposes.
The lower end of the tube, rod, wire, chain or cord is fixed or attached to a pin
which passes through a hole provided therefor in the lower extremity of the porous
cylinder where it is cemented. A nut screwed in the pin outside the cylinder and
bearing against a washer serves to tighten the tube, rod, wire, chain or cord, which
at its upper end is rigidly connected with the cover of the cylinder or is otherwise
secured against shifting in the said cover.
It is more advantageous to employ a tube than a rod, wire, chain or cord because
it can serve at the same time as an outlet for the filtered liquid; the liquid
passing through the pores of the hollow cylinder into the inner space and then
through holes into the tube whence it is conducted away. As it is not required to
remove these filtering cylinders out of the vessel, they can be placed close together
in great numbers.
It is advantageous to place brushes or the like between the cylinders so that by
rotating them they can be cleaned from deposits.
If instead of a tube, a rod, wire, chain or cord be used the filtered liquids pass out
through an opening in the cover.
The tube or rod may also serve as a spindle or shaft for journaling the filtering
cylinder.
Dhoond 1 of Fahruary 1809
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Hollow Porous Filtering-cylinders for use in
Filtering-vessels.
I, Dr. HERMANN NORDTMEYER, of 18, Speicherstrasse, Gelle, in the Empire of
Germany, Gentleman, 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 :-
My invention relates to hollow porous filtering-cylinders for use in filtering-
vessels.
Such filtering cylinders as heretofore made, which require to be frequently cleaned,
are difficult to handle on account of their fragility.

page_text: My invention consists in strengthening the cylinder by means of a stiffening
tube or rod or a tightened wire, chain or cord passed lengthways through the
cylinder. The said rod, tube, wire, chain or cord in certain cases also serves to
facilitate the handling or turning of the parts in the filtering vessel for cleaning
purposes.
In order to enable the invention to be fully understood we will describe the same
by reference to the accompanying drawing, in which :-
Figures 1 and 2 are respectively a vertical section and a horizontal section of a
filtering body strengthened by means of a tube; and,
Figure 3 is a vertical section of a filtering body provided with a chain.
Referring to Figures 1 and 2 the lower end of the tube B is fixed or attached
to a pin a which passes through a hole provided therefor in the lower extremity of
the porous cylinder A where it is cemented. A. nut b screwed on the pin outside the
cylinder and bearing against a washer e, serves to tighten the tube B which, at its
upper end, is rigidly connected with the cover D of the cylinder or is otherwise
secured against shifting in the said cover.
As shewn in Figure 3 I sometimes make use of a chain B¹ instead of the tube B
(or a rod, wire or cord may be employed) but it is more advantageous to employ a
tube because it can serve at the same time as an outlet for the filtered liquid, the
liquid passing through the pores of the hollow cylinder into the inner space and
then through holes c, into the tube B whence it is conducted away. As it is not
required to remove these filtering cylinders out of the vessel, they can be placed
close together in great numbers.
It is advantageous to place brushes or the like between the cylinders so that by
rotating them they can be cleaned from deposits.
In cases where a rod, wire, chain or cord is used instead of the tube B the filtered
liquids pass out through an opening i, in the cover.
The ends d of the tube or rod may also serve as journals on which the filtering
cylinder turns.
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. A hollow porous filtering-cylinder for use in filtering-vessels having a perforated
tube, rod, chain, wire or rope arranged within the same substantially as, and for the
purposes, herein before described.
2. A hollow porous filtering-cylinder of the kind referred to in Claim 1, the ends
of the tube or rod of which serve as journals on which the cylinder turns substantially
as hereinbefore described.
3. The improvements in hollow porous filtering-cylinders for use in filtering-vessels
herein before described and illustrated in the accompanying drawings.
Dated this 12th day of October 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.