IMPROVEMENTS IN Coffee. MACHINES
Year: 1885

page_text: I, FRIEDRICH MOHRHOFF resident of Naples, Kingdom of Italy, Professor
do hereby declare the nature of said invention for IMPROVEMENTS IN Coffee.
MACHINES to be as follows:-
.
These improvements relate to the general arrangement of the coffee-machine and
are represented by the drawings.
The receptacle b for the finished coffee is enclosed by the receptacle k for hot
water, so that the finished coffee is further warmed by a waterbath.
The sieve a, Fig. J, is borne by a separate stand, the other parts of the machine
acting as a balancing or pendulum-contrivance and this separate attachment or
suspension causes the automatic extinction of the flame.
Fig. I. represents the machine with separately placed sieve; Fig. II shows the
modification of a complete pendulum-machine.
The machine may be constructed as a pendulum or balancing-machine; the
effect is as follows.
The closed water reservoir k provided with the ascension pipe e, is heated, the
steam generated in small quantity (before the boiling of the water) escapes through
the little hole d (Fig. I.) of the pipe e and facilitates and commences the extraction
of the coffee by warming and moistening. When the water is boiling, the
opening & being no more large enough for allowing the steam to escape, a mixture
of steam and water passes over, whereby the coffee is much better extracted, than
heretofore, as the steam not only facilitates the extraction of the coffee by opening
the pores, but also keeps the water boiling by its latent heat, while it trickles
down through the coffee.
This purpose is attained most perfectly by the arrangement, Fig. II, the
ascension-pipe e terminating directly in the sieve, whereby the extracting water is
continually furnished with fresh steam.
After the water has passed over from the boiler k, the latter supported by the
lever cp (Fig. I) rises, or it swings round the centre x (Fig. II.) and releases
in known manner the arm q of a lamp, the special and new construction of which
will be described below.
In Fig. I. the sieve or straining vessel is suspended separately from the stand s
and acts as an intermediate receptacle, which causes the release of the balance p
by collecting the water more quickly, than allowing it to pass through the
filter

page_text: In Fig. II the coffee-receptacle serves as part of the pendulum in this combi-
nation.
The excentric arrangement of the fluid in the receptacle k for the hot water
causes the swinging and increases eventually the releasing action of the balancing
machine.
The lamp has either two flames, namely a large and a small flame, the large
flame is extinguished by the released arm k; or it is constructed as shown in Fig. I.
The arm q keeps up the movable wicktube n; m is a fixed pipe. By the falling
of the arm q, and thereby of the wicktube n, the side of the tube m diminishes the
flame.
The sieving contrivance in Fig. II consists of a vessel 8, closed above, in the
middle of which is situated the filtering body r the sieving surface being as large
as possible. The steam is introduced from the boiler through the pipe e e¹
terminating above the sieving body. The water therefore is pressed by steam-
pressure through the sieve, and below the coffee runs into the reservoir b.
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
In pendulous or balancing coffee-machines:-
1. The combination of a pendulous or balancing boiler & with a coffee-receptacle b
enclosed by the boiler but suspended separately, the said receptacle b serving to
diminish the weight of the boiler k for the purpose of extinguishing the flame.
2. The combination of the boiler / containing the coffee-receptacle, with a
filtering vessel supported by a separate stand and serving to diminish the weight
of the boiler, for the same purpose as indicated under N° 1.
"
3. The excentric arrangement of the coffee-receptacle in the interior of the
boiler k for increasing the releasing action, or causing the pendulum to swing.
4. An opening d adapted to establish communication between the steam space
of the boiler and the filtering vessel, for the double purpose of removing the hot
air from the boiler and conducting a mixture of steam and water to the sieve to
facilitate the extraction.
5. A lamp having a fixed outer casing m and a movable inner wick-tube n, for
the purpose of diminishing the flame and removing it at the same time from the
boiler k.
6. A lamp having two flames, a small one and a large one, the large flame being
extinguished by the falling of a lid (as in the ordinary balancing machines with
single flame) after the water has boiled over, while the small flame continues to
burn for keeping the coffee warm.
7. A flat sieve 8, Fig. III, consisting of a cover i, central filtering body r and
upper steam inlet e e¹ for the purpose of pressing the water uniformly through the
filtering vessel by steam pressure.