Improvements in Apparatus for Obtaining Infusions of Coffee, Tea, or the like.
Year: 1894

page_text: Date of Application, 24th Sept., 1894
Complete Specification Left, 22nd June, 1895-Accepted, 27th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Obtaining Infusions of Coffee, Tea,
or the like.
I WILHELM EISENMENGER of Ludwigsburg Wurtemberg in the Empire of
Germany, Manager of The Metal and Lacquered Goods Manufacturing Company
do hereby declare the nature of this invention to be as follows :-
The subject of the following invention is an apparatus constructed of white metal
or of some other suitable material, of a comparatively narrow or lofty cylindrical
shape, fitted at the top with a tight cover, and at the lower part with a
proportionately pointed converging cone and an outlet tap.
This cone is covered with a strainer of the same conical shape, and between the
strainer and the cone a filter or straining cloth is inserted, so that a proportionately
lofty column of water can press down from above upon the coffee which is suitably
placed in the cone and an exhaustive infusion of the coffee is thus obtained.
The cylinder which is rather lofty and has a comparatively narrow diameter, is
fitted at the top with a cover made as tight as possible while the lower portion of
the cylindrical vessel is fitted with a removable stand in the shape of a plate
or disc.
This cover which is easily turned round or removed is furnished on a projecting
edge or flange two fissures or slots opposite each other. At the lower end of the
cylindrical vessel, and corresponding with these two fissures, or slots two pins are
introduced also opposite to each other. If these two pins are inserted into the
perpendicular fissures or slots on the cover and a slight revolution be given to the
This vessel can
cover, the vessel becomes firmly locked together with the cover.
then be placed over any other vessel that may be destined for the reception of the
coffee when ready.
In the interior of the cylinder a pointed cone is fitted which terminates in a tube
for the reception of an outlet tap, finding an exit through a side opening at the
lower part of the cylinder. Over the cone the similarly conical shaped filter is laid,
and a strainer is placed over these whose shape is determined by that of the cone,
and which is so arranged that a few millimeters of space intervene between the
strainer and the cone.
The object of preserving this intervening space is to prevent the filter and the
cone from coming too near together in the vessel and thus impeding the proper
action of the apparatus. To obviate such a possibility as this, three small pro-
jections are provided in the interior of the cylindrical vessel and with which the
filter and strainer come in contact when they are inserted in the vessel. Inasmuch
as three of these projections are sufficient to keep them in their proper places, we
must consider these three projections as an important feature in the apparatus.
The handle of the strainer reaches almost up to the cover of the vessel.
The operation of the apparatus is as follows:-
In order to prepare the coffee first take out the strainer then press the straining
cloth from beneath firmly up against it and shake the coffee-powder into the
strainer. Replace the strainer in the cylinder so that the filter comes between the
strainer and the cone.
Now pour in a small quantity only of boiling water, so that the coffee is just
well covered by it, allow the apparatus to remain some time with the tap closed,

page_text: then pour in water sufficient for the quantity of coffee required, put on the cover
and let the coffee stand for another short or long period, then open the outlet tap
and allow the coffee to flow into the vessel destined for its reception slowly or
quickly according to the position of the outlet tap.
The advantages offered by. the apparatus are the following: Owing to the
shape of the cone and to the comparatively small diameter of the cylinder, the
coffee powder lies in a space which is funnel shaped and becomes more and more
contracted. The water can thus thoroughly permeate the whole of it. By keeping
the tap closed the boiling water can operate on the coffee powder for as long a
period as may be desired, and after the tap has been opened, the proportionately
lofty column of water owing to its weight, forces out the concentrated solution
lying below it, and thus extracts the whole of its virtues..
The apparatus is suitable not only for the preparation of coffee but is also
adapted for making tea.
Dated this 24th day of September 1894.
WHITE & WOODINGTON,
27 Southampton Buildings, London,,Agents.
Improvements in Apparatus for Obtaining Infusions of Coffee, Tea,
or the like.
1, WILHELM EISENMENGER of Ludwigsburg, Württemburg in the Empire of
Germany Manager of The Metal and Lacquered Goods Manufacturing Company.
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 subject of the following invention is an apparatus constructed of white metal
or some other suitable material of a comparatively narrow and lofty cylindrical
shape fitted at the top with a tight cover, and at the lower part with a
proportionately pointed converging cone, and with an outlet tap.
This cone is covered with a strainer of the same conical shape, and between the
strainer and the cone a filtering material of cloth or other suitable material is
inserted so that a lofty column of water is caused to exercise its pressure upon the
coffee which is suitably placed in the conc, and an exhaustive or concentrated
infusion of coffee or the like is thus obtained.
And in order that the said invention may be more clearly understood and readily
carried into effect, I will now proceed to describe the same aided by the accom-
panying drawing which represents a vertical section of the apparatus.
b represents the cylinder or body, of the apparatus which is of considerable
height and the diameter of which is comparatively narrow, and a represents a
cover which closes the upper part of the cylinder and is made as tight as possible
therewith.
The lower part of the cylindrical vessel b is fitted with a removeable stand in
the shape of a plate or disc, and this stand which is adapted to be easily turned
round.or removed, is formed with a projecting flange h¹ having formed therein two
L slots 2 arranged at diametrically opposite points in the circumference of the
Hlange h¹.
At the lower end of the cylindrical vessel and corresponding with the slots
two studs or pins i are provided which are fixed at diametrically opposite points in.
the circumference of the vessel band in positions corresponding with the slots h³
of the stand / so that by introducing the pins or studs i into the slots /² through

page_text: the perpendicular parts thereof and giving a partial revolution to the cover h the
latter will be firmly locked with the cylindrical 'vessel b.
The vessel b may now be placed over any other vessel that may be destined for
the reception of the infusion of coffee or the like, the stand serving, to .support
the device in position thereon.
In the interior of the cylindrical vessel b is fixed a cone c which constitutes the
bottom of the vessel b, and this cone c terminates in a tube c' intended for the
reception of an outlet tap d which finds an exit through the stand h, or it might be
through a side opening at the lower part of the cylindrical vesselib.
Covering the conical bottom c of the vessel is placed a similarly shaped piece
of filter cloth or other suitable material e, and over this conical piece of filter
material e is placed a loose strainer f, the shape of which is determined by the
shape. of the conical bottom c and this strainer f is so arranged that a few
millimetres of space intervenes between the same and the conical bottom c.
The object of preserving this intervening space is to prevent the filter material e
and the cone from being too closely pressed together in the vessel, and thus
impeding the proper action of the apparatus, and in order to obviate such a
possibility as that three small studs or projections k are provided in the interior of
the cylindrical vessel b and with which the strainer f comes into contact when it is
inserted in the conical part c of the vessel 6 the studs or projections k acting as
distance pieces to retain the parts in their proper relative positions.
Three of these projections or distance pieces k are sufficient to keep the parts in
their proper places and it may be considered that these three projections form an
important feature of the apparatus.
The strainer is provided with a long handle g which reaches almost to the
cover a of the vessel b and by which handle g the strainer may be lifted or
removed when desired.
The operation of the apparatus is as follows:-
In order to prepare the coffee or the like the strainer must be first removed by
means of the handle g together with the filter cloth e and the cloth e must be held
firmly against the same whilst the ground coffee or the like is being introduced into
the strainer.
The strainer together with the filter material e must now be re-placed in position
so that the filter material e comes between the strainer and the conical part c of
the cylindrical vessel b.
A small quantity of boiling water must now be poured into the vessel b, so that
the coffee is completely covered thereby.
The apparatus must then be allowed to remain at rest for some little time with
the tap d closed; a further charge of water sufficient for the quantity of coffee
required must then be introduced into the vessel b and the cover a placed in position
after which the coffee must be allowed to stand for a further time when the outlet
tap d may be opened and the infusion of coffee or the like allowed to flow into the
vessel destined for its reception, and either slowly or quickly according to the
regulating of the tap d.
The advantages offered by this apparatus are the following
Owing to the conical shape of the bottom c of the vessel b and to the compara-
tively small diameter of the cylinder 6 the ground coffee lies in a space which is
funnel shaped and becomes more contracted towards the outlet and the water is
thus caused to permeate the whole of the coffee under treatment.
By keeping the tap d closed the boiling water introduced into the vessel 6 may
be caused to act upon the contained coffee for as long a period as may be desired
and after the tap & has been opened the lofty column of water within the vessel b
owing to its weight forces out the concentrated solution lying below it in the conical
bottom c and thus extracts the whole of its virtues.
The apparatus is suitable not only for the preparation of coffee but it is also
adapted for making tea.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
An apparatus for obtaining infusions of coffee tea or the like comprising a vessel
provided with a removeable cover and a removeable stand and formed in the
interior with a conical bottom terminating in an outlet tap, a conical strainer fitting
into the conical bottom, a cone of filter cloth or the like placed between the two
and means for preventing the strainer approaching too closely to the conical bottom
substantially as herein shown and described.
Dated this 22nd day of June 1895.
WHITE & WOODINGTON,
27 Southampton Buildings, London, Agents.