Improvements in Filtering Apparatus.
Year: 1898

page_text: Date of Application, 3rd Mar., 1898-Accepted, 27th Aug., 1898
COMPLETE SPECIFICATION.
Improvements in Filtering Apparatus.
I, THEOBALD FRIEDRICH SEITZ, of Kreusnach, in the Empire of Germany,
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:-
The filtering apparatus forming the object of this invention and several modi-
fications of which are shown in the accompanying drawings, is particularly de-
signed for the filtration of valuable liquids such as wines, spirits, cordials, &c., and
its construction is such that it can be utilized for large as well as for small
quantities of liquids which are generally mixed with a fibrous filtering material
such as asbestos and the like before being placed in the filtering apparatus.
In the drawings, Figures 1, 3, 5, 7, 8 and 9, are vertical sections of six
different forms of filtering apparatus, and Figures 2, 4 and 6 are horizontal sections
on lines a, x, y, y, and w, w, of Figures 1, 3, 5 respectively.
The characteristic feature of the new filtering apparatus is a casing D, Figure 1,
preferably of cylindrical shape common to all the arrangements and watertight;
and provided with a distributing cover or plate v; this casing is designed to
receive the liquid required to be filtered and its lower extension which, accord-
ing to the object in view, may be cylindrical or conical is provided with sieve-like
perforations or is made of fine wire gauze and it constitutes the filtering
vessel R or R (Figures 1, 2, 3, 4, 5, 6, and 9). When the filtering vessel has
a conical shape as at R¹ (Fig. 7), it is advisable to place the casing D in a special
funnel E provided with an outlet tap and forming the outer collecting receptacle,
this receptacle having a small overflow pipe o. When such a filter is operated,
the lower outlet tap is first closed, when the filtered liquid will run out at o in
order to obtain a uniform covering or deposit of the floating fibrous filtering mate-
rial around the inner walls of the pointed filtering vessel. The lower funnel E¹ of
this filtering apparatus which is more suited for small quantities of liquid can
be arranged in the manner shown in Figure 7, that is to say, it may be either
suspended to a support or bracket s or to the wall. When the sieve-like per-
forated filtering vessel R has a cylindrical shape as shown in Figure 1, its bottom
is not perforated but is provided in the centre with a screw threaded outlet collar
or nut m in order to screw therein according to requirements inner receptacles S
of various forms provided with screw threaded outlet pipes m¹ for this purpose
(Figures 1, 3, 5). When these receptacles are slightly conical Figs. 1 and 3, or
cylindrical, as large a filtering surface as possible relatively to the smallest pos-
sible inner filtering space is obtained, provided these inner receptacles are formed
as sieves, which is a very beneficial arrangement for filtering large quantities of
particularly thick or cloudy liquids. To reduce the size of the inner filtering
space without thereby increasing the filtering surface, impermeable bodies Si

page_text: instead of perforated bodies S of cylindrical or conical shape (Figure 5) may be
placed in the filtering vessel R, whereby the floating fibrous material is at the
same time better distributed over the walls of the vessel R.
When it is contemplated to thoroughly filter small quantities of liquid, i.e.
down to the last drop, a conical filtering vessel R' is directly connected to the
impermeable casing D, as shown in Figure 7, or the conical sieve-like inner
appendage S, Figure 3, is directly used therefor, to which appendage may be first
connected a pipe D' carrying a funnel in the manner clearly shown in Figure 8.
Although, in the arrangements above described, the inner sieve-like body or
receptacle S is connected by a releasable screw joint with the outer perforated
filtering vessel R, both parts could also be firmly fixed together in the manner
shown in Figure 9. In this case it is advisable to provide at the top or apex of
the appendage S a tubular opening r of suitable form and passing through the
wall of the casing D and to provide further in the lower ring connecting the
receptacles R and S a discharge tap h furnished with a plug opening upwardly
and operated at the top of the apparatus by means of a rod h¹, in order to be
able, when turning this plug, to allow the unfiltered residuum to run off quickly
if required.
In the lower part of the solid or impermeable casing D that is to say, above
the sieve-like wall R is placed a distributing cover which is perforated like a
sieve and serves to uniformly distribute the fibrous filtering material introduced
with the liquid to be filtered over the walls of the filtering vessels R or S. This
cover can be either flat as shown in Figures 1, 3, 5 and 7 or be provided with a
circular groove or gutter as shown in Fig. 9.
All the foregoing arrangements are placed in an outer envelope or collecting
receptacle E which is provided at the lower end with a discharge tap Z for the
filtered liquid.
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 claim is
1. A filtering apparatus for wines, spirits, and the like in which the liquids
requiring to be filtered are introduced with the admixture of fibrous filtering
material such as asbestos and the like, characterized by a cylindrical casing D of
cast metal provided at the bottom with a flat or grooved distributing cover or
plate, wherein the cylinder D is provided below with a cylindrical or conical
extension having walls perforated after the manner of a sieve or made of fino
wire gauze or fabric and constituting the filtering vessel proper R in which, when
it assumes a cylindrical form can be introduced or can be firmly fixed a filtering
vessel S a second perforated body or appendage of suitable form for increasing
the filtering surface, or an impermeable hollow body S¹, for the purpose of
reducing the said filtering surface, while in both cases reducing the space for the
liquid requiring to be filtered.
2. In filtering apparatus of the kind above claimed and provided with a conical
filtering vessel R¹, the adaptation of an outer funnel shaped collecting receptacle
(E Figure 7) with a lower discharge tap Z and an upper overflow pipe o for the.
purpose of distributing the fibrous material over the perforated walls.
3. In filtering apparatus of the kind above claimed and provided with a cylin-
drical filtering vessel R, the adaptation of the inner conical sieve-like body or
appendage S which can be used alone in an inverted position after having been
screwed on to a tube D¹ provided with a funnel for filtering small quantities of
liquids.
4. In filtering apparatus of the kind above claimed and having a conical inner
sieve-like body or appendage S firmly connected with the outer perforated filtering
vessel R, the use of an upper pipe r for the escape of air extending from the
inner body S to the walls of the cast casing or cylinder D, as well as a tap h

page_text: operated at the top by a rod h¹ with a plug opening upwardly and arranged in
the connecting bottom ring below between the inner and outer casings S and R
for the purpose of allowing the unfiltered liquid to run off sharply.
Dated this 2nd day of March 1898. .
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agents for the Applicant.