An Air-filter Plug for Casks and the like.
Year: 1890

page_text: Date of Application, 23rd June, 1890
Complete Specification Left 18th July, 1890-Accepted, 23rd Aug., 1890
PROVISIONAL SPECIFICATION.
An Air-filter Plug for Casks and the like.
I, GEORG DANNINGER, of Wasserburg, in the Kingdom of Bavaria, Empire of
Germany, Brewer's Manager, do hereby declare the nature of this invention to be as
follows:-
This invention relates to casks, vats and other closed receptacles used in various
processes of making and for storing beer and wines etc., and the object of the
invention is to prevent the beer, wine, or other liquor from being damaged by contact
with germs or infectious watters present in the air of cellar or place where the beer
or wine etc., is placed.
To this end the invention consists in a plug to be fastened in the cask or vat or
other said closed receptacle, said plug being provided with an air filter which purifies
the air entering the cask and allows air or carbonic acid gas to issue from the cask if
necessary.
Into a hole cut in a stave or head, or into a hole cut in a bung inserted in a hole
in the stave or head, is screwed a socket screw threaded inside to receive the filter
plug, the latter is provided above with a cylindrical chamber into which a cap is
screwed, said chamber containing asbestos or other air filtering material, a ring being
inserted above the said material to be pressed down by the cap; holes are made in
the cap and in the floor of the chamber whereby the air may pass through the
chamber.
Dated this 23rd day of June 1890
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
An Air-filter Plug for Casks and the like.
I, GEORG DANNINGER, of Wasserburg, in the Kingdom of Bavaria, Brewery
Manager, 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 relates to casks, vats and other closed receptacles used in various
processes of making and for storing beer and wines etc., and the object of the
invention is to prevent the beer, wine, or other liquor from being damaged by contact
with germs or infectious matters present in the air of the cellar or place where the
beer or wine etc., is placed.
To this end the invention consists in a plug to be fastened in the cask or vat or
other said closed receptacle, said plug being provided with an air filter which purifies
the air entering the cask and allows air or carbonic acid gas to issue from the cask if
necessary.
Into a hole cut in a stave or head, or into a hole cut in a bung in-erted in a hole in
the stave or head, is screwed a socket, screw threaded inside to receive the filter
plug, the latter is provided above with a cylindrical chamber into which a cap is
screwed, said chamber containing asbestos or other air filtering material, a ring being
inserted above the said material to be pressed down by the cap; holes are made in
the cap and in the floor of the chamber whereby the air may pass through the
chamber.
The accompanying drawing shows a cross section of part of a cask fitted with the
improved air filter oluơ.

page_text: a is the metal screw, which is screwed either into the perforated wooden-bung or
into the cask or stave, supposing that the bung is closed air-tight.
b is the filter-plug proper, containing the filtering material c (asbestos fibre or the
like) pressed down by the ring d by means of the cape.
The perforations & in the floor of the part band e' in the cap e admit atmospheric
air to the cask.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is
A plug with an air-purifier consisting of the socket a, filter-plug b with perforation b¹
filtering substance c and closing cap e with perforation e' substantially as and for the
purpose set forth.
Dated this 10th 1.
T..1
1000
HERBERT & Co.,
18, Buckingham Street, Strand, W.C., London, Agents for Applicant.