DE216104C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 34 /. GROUP

Patented in the German Empire on October 13, 1908.

The invention relates to a coffee machine of the type in which a lower Container of boiling water due to the effect of the steam generated during cooking an upper container containing ground coffee and after penetration and the leaching of this coffee material taking place after the former The container runs off again, from where it can be poured out through a ίο pouring tube.

Only smaller amounts of the

available water is heated and intermittently after the ground coffee containing space pressed, wherein according to the invention a device is taken to the small amount of water to be heated from the remaining water without the use of Valves or other closure organs to prevent heat loss as possible isolate. Because the coffee is not immediately poured through the entire amount of water, but in

'. is brewed by smaller amounts of water in successive short periods of time at the same time a better leaching of the coffee material instead, so that all valuable components are thoroughly withdrawn from it.

An embodiment of the subject of the invention is shown in the drawing.

Fig. Ι is a general view of the coffee maker in partial cut.

Fig. 2 is a larger-scale mean cross-section of the lower part.

3 to 6 show individual parts of the machine.

In the main container 10 is a known manner for receiving the ground Can 11 serving coffees with a perforated bottom 12 is used, from which a tube 13 is guided upwards, which passes through a central opening of the water distribution plate 14. Over this is the glass cover 15, which is emerging from the ejection tube 21 hot water holds together.

The bottom of the container 10 is designed as an open-topped sleeve 16, the upright Wall i6 'separated from the water in the main vessel by an annular air space 17 and which serves as a heating chamber by applying the heat to the one provided with a stand plate 18 Soil is concentrated.

The wall i6 'is provided with a step 16 ″ on which the outwardly projecting edge of a closed air chamber C rests, the central part of which is screwed to the ejection tube 21. The air chamber is shown in top view in FIG. 5 and in FIG. A number of small holes 22 are provided in the edge of the air chamber, through which the water enters the heating chamber 16 and under the air chamber C., so that in this way only a small amount of water covers the bottom of the heating chamber and is heated quickly.

The hot water now enters a cooking chamber S which is completely in. The wall plate 18 heated by the gas flame or other heat source, in which it is exposed to heat from all sides, so that the amount of water contained in this chamber boils and that in the Ejection pipe 21 amount of water located from the pipe upwards

Claims (6)

drives out. This process is repeated in very short intervals. In order to prevent a loss of steam energy as much as possible, a nozzle N is arranged in the heating chamber, the conical mouth of which has a slightly smaller diameter than the ejection tube 2i, so that the steam generated in the cooking chamber is, as it were, injected into the lower end of the ejection tube. The discharges ίο follow one another very quickly because the water, before it even gets into the cooking chamber 5, already has a high temperature in the heating chamber. In order to avoid the withdrawal of the steam generated in the cooking chamber or the water heated in the heating chamber into the main vessel or at least to reduce it as much as possible, a resistance device is provided above the air chamber C, which in the illustrated embodiment has the shape of an inverted bowl 26 which rests on the upper edge 19 'of the air chamber C. The middle part of the shell is provided with cutouts 28 (FIG. 3) through which the water enters from above and then flows over the surface of the air chamber and through the openings 22. In order to get back over the shell, the heated ■ water in the heating chamber 16 would have to flow again through the central cutouts 28 against the resistance of the above amount of water, which in reality cannot occur because the air space 25 created in the shell absorbs the pressure, especially still for the reason that the shocks caused by the development of steam follow one another too quickly and the inertia of the larger amounts of water cannot be overcome. In order to further reduce the cooling of the water in the heating chamber 16 by the water in the main container, the heating chamber is covered with a cap B, which consists of an inner shell 50 and an outer shell 51, with an empty air space 52 between them form, through which the water in the chamber 16 is isolated from the water in the container 10. The inner diameter of the inner shell 50 is only slightly larger than that of the outer wall 16 'of the heating chamber. The cap B offers the possibility of precisely determining the amount of water located in the upper part of the chamber 16, in that this amount of water increases the further the cap is removed from the wall of the space 17. So that the space under the cap B is always filled with water, a connecting tube 53 extending through the two walls of the cap is provided. The cap B is attached to an air pipe 31 which encloses the ejection pipe 21 and is isolated from the amount of water in the main vessel 10 so that the water column located in the pipe 21 is not cooled. The lower rounded end of the air pipe 31 is airtightly connected to the discharge pipe; the various parts are tightened against the air tube by means of the thread in the air chamber. The standing plate 18 is, as shown in Fig. 2, provided with a shoulder 18 'on which the underside of the chamber floor 16 rests, which is riveted to this, so that a tight connection is achieved. The air chamber C, the part 26, the cap B and the tubes 21, 31 must be held in place during the upward movement of the heated water, which is achieved by a flat spring 40 which surrounds the ejection tube and which is on the upper closed end of the air tube 31 lays while its two ends lie against the underside of the floor 12. The sleeve 11 is held in the container 10 by bulges provided in its side wall which rest against the downwardly curved edge ίο 'of the main container. ■ Patent-A ν Proverbs: 1. Coffee machine with a container serving to .aufnähme of ground coffee, in which hot water is introduced from a water container by the pressure of the steam generated during cooking in a cooking chamber, characterized in that the cooking chamber (S) upstream heating chamber '( 16) is separated from the liquid container (10) by spaces arranged like a labyrinth in order to avoid the entry of the steam generated in the cooking chamber or the withdrawal of the water heated in the heating chamber into the liquid container without movable closing elements. 2. Coffee machine according to claim 1, characterized in that the heating chamber (16) through a surrounding airspace (17) is isolated from the water space of the main tank. 3. Coffee machine according to claim ι and 2, characterized in that the heating chamber is covered by a double-walled cap (B) so that an insulating air space (52) is created between the water in the heating chamber and the amount of water in the main vessel. 4. Coffee machine according to claim 1 to 3,. characterized in that with the Heating chamber connected discharge pipe (21) for the heated water through a surrounding it Air pipe (31) is isolated from the amount of water in the main vessel. 5 · Coffee machine according to claim ι to 4, characterized in that the heating chamber contains an air chamber (C) , whereby only a small amount of the water in the heating chamber is brought into direct contact with the heating plate and that with the remaining amount of water the heating chamber is in communication through reduced openings. 6. Coffee machine according to claim 1 to 5, characterized in that the cap (B) with the ejection tube (21) is held in position during use by a resilient device (40). For this purpose ι sheet of drawings.