Year: 1886

page_text: I, CARL HÖLTERHOFF of Marienburg, near Cologne, in the German Empire 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 an improved construction of coffee making machines,
which I will proceed to describe with reference to the accompanying drawings in
which Fig. 1 shews a vertical section and Fig. 2 an elevation.
The interior of the coffee machine is divided in the known manner by the
partition a into two compartments of which the lower one P serves to contain the
water, while the upper one Q contains the coffee decoction.
In the lower compartment P is a cock having a barrel A and hollow plug B, the
barrel A being fixed directly upon the partition a; the hollow plug has an upper
tubular extension b on which is fixed the receptacle or box C for the ground coffee,
this being situated between two perforated plates c and c', of which the latter is
pressed tightly against the lower edge of the box by means of a ring d screwing
with a central boss on a screw thread on the tube b. The cock barrel has lateral
openings e el ell el situated vertically one above the other and the plug B has
corresponding openings f f f f¹¹1 which are so arranged in oblique positions that
by turning the plug, one or other of these openings can be made to communicate
with its corresponding opening in the barrel, only one of these communications
being established at one time; or the plug can be turned so that they are all
closed. There is also a passage through the lower end of the cock which cannot
be closed.
In using the coffee machine, the steam pressure of the boiling water drives this
out of the compartment P through the bottom opening of the cock into the tube b,
from the upper end of which it flows through side openings on to the sieve c and
among the ground coffee in the box C, and after extracting its essence it flows as
finished coffee through the sieve c' into the compartment Q.
As soon however as the level of the water in P has sunk to the lateral opening
of the cock which is at the time open, the steam escapes through the latter up the
tube b and no more water passes up into the coffee box.
The quantity of water supplied to the coffee box is consequently increased
according as the open passage of the cock has a deeper position in the water, that

page_text: is, most water will pass through when e¹11 f 111 is open and least when e¹ f1 is open.
If on the other hand e f is open, no water will pass up but only steam. If all the
side openings are closed, the whole contents of P will pass up through the bottom
opening of the cock. An index g on the side of the coffee box and a scale on the
upper edge of the vessel enable the plug of the cock to be set by turning the coffee
box so as to establish a communication through one or other of the side openings,
and thus to determine the quantity of water that is to pass through the ground
coffee, according as this is desired of greater or less strength. At the commence-
ment it is advisable to leave the opening ef open, in order that steam may in the
first instance pass up among the ground coffee and swell it out so as to be more
advantageously acted upon by the water. A tube his fixed round the tube b, so
as to prevent solid particles of coffee from passing into the barrel A when the
tube b and plug B are removed.
For filling the coffee box C with coffee, this is drawn out of the pot together
with the tube b and plug B; the parts are then inverted, the ring d is unscrewed,
and the plate c' is removed, and after filling the box with coffee and the com-
partment P with water, the parts are put together again.
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. Constructing coffee making apparatus with a compartment containing water
communicating with a receptacle for the ground coffee through a cock and tube so
arranged that the water compartment can communicate with the coffee receptacle
through an opening at the bottom of the cock and through one or other of a series
of side openings formed at different heights in the barrel and plug of the cock, so
that, by turning the plug so that such side openings are either all closed or the one
or the other thereof is open, the quantity of water supplied to the coffee receptacle
can be regulated substantially as herein described.
2. The herein described construction of apparatus for making coffee consisting
mainly of the partition a carrying the cock situated in the water compartment P
and consisting of the barrel A with hollow plug B, having side openings ef e¹ fi
ell felf at different heights, only one of which can be open at a time; the
tube b forming a continuation of the barrel B and carrying the coffee receptacle C,
into which the water passes from the compartiment P through the plug and tube;
the ring d screwed on to the tube b for securing the plate e closing the
receptacle C; the tube h for protecting the cock from solid particles and the index g
with scale, for regulating the position of the cock.
ABEL & IMRAY,
Agents for the Applicant.