Year: 1887

page_text: Date of Application, 22nd Nov., 1887
Complete Specification Left, 20th Aug., 1888
Complete Specification Accepted, 21st Sept., 1888
прис
declare the nature of this invention to be as follows:-
21
My invention relates to filtering apparatus and substantially comprises casing
closed on all sides, in which are arranged the filters placed closely one above the other,
and separated from each other by perforated plates or sieves.
The filters consist of an asbestos fabric which rests directly upon the said plates or
sieves, and loose asbestos fibre by which the space between every two such plates or
sieves is filled up. The apparatus is hermetically closed above by the cover. On the
inside of the latter are arranged stays that bear upon the upper perforated cover plate
and prevent the swelling of the filtering material by absorption so that only a very
small quantity of liquid is retained by the filtering material.
Below the lower perforated plate is arranged a dish-shaped bottom provided with
a central opening to which is screwed a bag made of silk gauze. This bag serves to
purify all the turbid residues, such as for example yeast from beer, spirit, wine or
the like, so that the liquid contained in these substances is extracted, whereas the
residue remains as a somewhat compact dough. For this purpose the filtering device
consisting of the filters and the perforated plates or sieves simply requires to be
removed from the apparatus, and the mass to be purified is placed upon the dish-
shaped bottom.
As the bag consists of several thicknesses of silk
and allows only quite clear liquid to pass through.
gauze, it retains any solid substance
By reason of this combination the present apparatus surpasses in point of efficiency
any apparatus heretofore used for a similar purpose.
The liquid to be filtered is put into a reservoir, and passes from the latter through
a pipe that can be closed by means of the cock to the apparatus, whilst the filtered
liquid is caused to flow from the apparatus through a cock arranged at the bottom of
the apparatus.

page_text: The perforated plates or sieves and the dish-shaped bottom are kept tight by means
of india-rubber rings so that the liquid cannot trickle through between them and the
wall of the apparatus.
The interior of the apparatus is rendered accessible by a sliding door without
necessitating the removal of the cover or the taking out of the filter with the perforated
plates or sieves.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for the Filtration of Liquids.
I, RUDOLF POL, of Heidelberg, in the Empire of Germany, Engineer, 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 filtering apparatus as illustrated in the accompanying
drawing. The said invention substantially comprises a casing A closed on all sides,
in which are arranged the filters F placed closely one above the other, and separated
from each other by perforated plates or sieves d.
The filters consist of an asbestos fabric which rests directly upon the said plates or
sieves, and loose asbestos fibre by which the space between every two such plates or
sieves is filled up. The apparatus is hermetically closed above by the cover D. On
the inside of the latter are arranged stays b, b that bear upon the upper perforated
cover plate c, and prevent the swelling of the filtering material by absorption, so
that only a very small quantity of liquid is retained by the filtering material.
Below the lower perforated plate is arranged a dish-shaped bottom e provided with
a central opening to which is screwed a bag B made of silk gauze. This bag serves
to purify all the turbid residues, such as for example yeast from beer, spirit, wine or
the like, so that the liquid contained in these substances is extracted, whereas the
residue remains as a somewhat compact dough. For this purpose the filtering device
consisting of the filters F, and the perforated plates or sieves c and d simply requires
to be removed from the apparatus, and the mass to be purified to be placed upon the
dish-shaped bottom e.

page_text: As the bag B consists of several thicknesses of silk gauze, it retains any solid
substance and allows only quite clean liquid to pass through.
By reason of this combination the present apparatus surpasses in point of efficiency
any apparatus heretofore used for a similar purpose.
The liquid to be filtered is put into a reservoir R and passes from the latter through
a pipe C that can be closed by means of the cock E to the apparatus, whilst the
filtered liquid is caused to flow from the apparatus through a cock F arranged at the
bottom of the apparatus.
The perforated plates or sieves c, d, and the dish-shaped bottom e are kept tight by
means of india rubber rings, so that the liquid cannot trickle between them and the
wall of the apparatus.
The interior of the apparatus is rendered accessible by a sliding door f without
necessitating the removal of the cover D or the taking out of the filter F with the
perforated plates or sieves c and d.
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 :-
In a filtering apparatus the combination of the filter F with a bag B made of fabric
and arranged at the bottom e, which bag serves especially for the filtration of the
turbid residues that have remained upon the filters F, substantially as, and for the
purpose, specified.
Dated this 20th day of August 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.