Abstract: The invention provides a drink machine for preparing and dispensing different hot and cold beverages. It comprises a plurality of beverage powder stock containers, each container being equipped with a feeding worm. Gearing units assigned to each stock container can be selectively coupled via a gearing unit to a common driving motor by actuating an electromagnet to operate the feeding worm of a selected beverage powder stock container. Thus, only one single driving motor is required to selectively operate all driving worms of the stock container. By this design, the feeding worms can easily be operated intermittently such that the overall quality of the prepared beverage is improved.

Abstract: The invention provides a coffee brewing machine, comprising a container for fresh cold water, a boiler for heating the fresh cold water, a brewing chamber adapted to receive coffee powder, a pump for feeding the fresh cold water from the container to the boiler and therefrom into the brewing chamber, a piston fitting into the brewing chamber and being movably mounted such that it can be moved into the brewing chamber to compress the coffee powder contained in the brewing chamber and removed from the brewing chamber, and an electric DC motor for driving the piston into the brewing chamber and for retracting it out of the brewing chamber. In order to provide for a simple connection of the electric motor to the mains voltage, a drop resistor and a rectifier diode are connected in series with the electric motor. The drop resistor simultaneously serves as a heating element for a hotplate on which the coffee cups can be preheated.