The Gillette Company

Braun Gmbh

Braun Aktiengesellschaft

Bruan Gmbh

Holger Hild

Christian Neyer

Ingo Vetter

Felix Koenig

Mathias Amann

Dietwald Schotte

Gerd Laschinski

Thomas Hohmann

Hartmut Loth-Krausser

Christian Wachter

The invention is related to a drive control for driving a dc motor of an electrical household appliance, in particular a hair cutting device such as an electric razor, shaver or epilator, at constant rotational speed.

Shaver motor speed control

A method for charging a rechargeable battery () of an electric device in different charging steps applying different charging currents is described, said charging steps comprising at least:

Method for charging a rechargeable battery of an electric device

Implementations of a method for determining a degree of dirtiness of a cutting tool that is driven in a back and forth motion by an electric motor include evaluating a parameter that corresponds to the motion of the cutting tool and that is used for controlling the electric motor. The degree of dirtiness is determined based on the parameter.

Determining degree of dirtiness of electrically driven cutting tools

The invention is directed to a method of controlling the water temperature in a beverage-brewing apparatus, wherein the water is initially heated in an open water reservoir up to the boiling point, said boiling point being reached in that the water is heated from the initial temperature T.sub.i up to a temperature T.sub.HIGH at which it is ensured that the water does not boil as yet under conventional environmental conditions, in that the rate of change of the temperature dT/dt during heating from the initial temperature T.sub.i to the temperature T.sub.HIGH is determined, in that on reaching the temperature T.sub.HIGH a period of time t.sub.heiz is determined from the difference between 100.degree. C. and T.sub.HIGH as well as from the rate of change of the temperature dT/dt, and in that on reaching the temperature T.sub.HIGH the water continues to be heated during the period of time t.sub.heiz. The temperature T.sub.HIGH is 75.degree. C., approximately.

Method of controlling the water temperature in a beverage-brewing

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Idstein, Germany

Holger Hild