Improvements in Filters.
Year: 1895

page_text: Date of Application, 9th Mar., 1895-Accepted, 13th Apr., 1895
Improvements in Filters.
1, THEOBALD FRIEDRICH SEITZ, of Kreuznach, Rhenish Prussia, in the Empire
of Germany, Merchant, do hereby declare the nature of this invention and in what
manner the same is to be perforined, to be particularly described and ascertained
in and by the following statement:—
The present invention relates to the manufacture of a filter designed for filtering
wine, beer and other liquids; which can easily be taken to pieces and in which the
liquid to be filtered is mixed with the filtering material. For instance asbestos
mixed with the liquid to be filtered is introduced from above into a suspended,
partly perforated double cylinder, the filtering material deposits itself on the inner
walls of the double cylinder and the liquid leaves in the filtered state through the
two walls of the cylinder from whence rising by various ways it collects in a common
chamber and thence flows off through a pipe.
Figure 1 shows a longitudinal section of the double-cylinder filter;
Figure 2 is a section on the line a-b;
Figure 3 represents a section on the line e-d of Figure 1.
The filter consists of the casing b, b', with the covers e, e¹, the bottom n, the
suspended perforated double cylinder D, the admission pipe u, the chambers r, r²:
with the pipes o, o¹, and the common collecting chamber with the discharge
pipe z.
The double cylinder D consists of a wide cylinder d, perforated for about
two-thirds of its length from its lower end, and a completely perforated shorter
cylinder d placed within the cylinder d. The cylinder d is provided above with a
flange f fixed by means of screws and packing material between the flanges formed
on the casing and cover e of the filter. The casing b¹ is made of corrugated
sheet metal, against whose inwardly projecting corrugations w the perforated
cylinder d¹ bears and thus offers resistance to the pressure of the liquid in the filter.
The cylinder d' carries an impervious cover c to which is fixed a branch pipe o.
The connection of the two cylinders d, d', at their lower end is effected by
suitable screws which enable them to be readily taken apart for the purpose of
cleaning.
In the upper impervious part of the cylinder d is arranged a connecting pipe of
which carries a branch pipe o2 which is united by a rubber pipe s with the branch
pipe o on the cylinder d. This connecting pipe o' also establishes a second
connection between the chambers 1, 2, which are annular in transverse section,
and the chamber which is likewise annular. A disc or plate t made in two parts
in order that it may be removed despite the existence of the pipe o' is formed at its
the
periphery with a channel furnished with holes p said disc bearing upon
A discharge cock for the remainder of the filtrate, and an air cock h¹
are provided the filter being mounted upon three feet or the like.
cover c.
The perforated cylinder d' may be corrugated in lieu of the sheet metal
casing, and its projecting corrugations will bear against the then smooth
cylinder b¹.
Instead of corrugating the cylinder d' or the casing 61 the latter may
strengthened by longitudinal strips soldered to b'.
The action of the double cylinder filter is as follows:-
The liquid to be filtered after being mixed with the filtering material is
introduced at u falls first upon the disc or plate t upon which, flowing to the

page_text: channel of the same, it passes through its holes p into the interior of the double
cylinder D. The filtering material is now deposited on the inner walls of the
cylinders d, d, and the liquid penetrating the same enters the chambers r and r
formed by the introduction of the cylinder D. The liquid now rises from
the annular collecting chamber and from through o and o' also to the collecting
chamber 2 from whence it passes to the discharge pipe z.
into
The perforated channel of the distributing disc or plate t, which covers the
double cylinder D, has for its object to lead the liquid entering the said cylinder
away from the inner walls of the cylinders d and d¹, in order that the filtering
material deposited on the same may adhere thereto.
By the arrangement of the pipe o at the same height as the discharge pipe z
counter-currents are obviated.
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 filter having a suspended perforated double cylinder D, consisting of a
cylinder & fixed by means of a flange between an outer sheet metal casing b and
cover e said cylinder d being finely perforated at its longer lower part, and a
shorter completely perforated cylinder d¹ with a sheet metal cover c, which two
cylinders are connected at their lower ends so that they may be severed, and having
a second connection of the interior chamber r, formed by the double cylinder D
and the casing established with the exterior chamber and collecting chamber r²
by means of the pipe o and the connecting pipe o substantially as described
with reference to the annexed drawings.
2. In a suspended double-cylinder filter the employment of a corrugated inner
sheet metal casing 1, against whose projecting corrugations w bears the inner
perforated cylinder d¹ substantially as described with reference to the annexed
drawings.
3. In a suspended double-cylinder filter the employment of a corrugated inner
perforated cylinder d', whose projecting corrugations bear against the then smooth
sheet metal casing 61, substantially as and for the purpose set forth.
4. In a suspended double-cylinder filter the employment of a conical two-part
dise or plate t provided with perforated channels, substantially as described with
reference to the annexed drawings.
Dated this 8th day of March 1895.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62, St. Vincent Street, Glasgow, Agent for the Applicant.