Abstract: A rotary piston engine, comprising at least two working chambers formed by a housing, a working rotary piston rotating therein and at least one rotating auxiliary rotary piston. A method of operating the rotary piston engine. In order to allow different compression ratios and ignition timings and in order to increase the rotatability and leakproofness of the rotary pistons even during long-term operation of the rotary piston engine of the type in question, the rotary piston engine comprises at least two working chambers, which are formed by a housing, a working rotary piston rotating therein and at least one rotating auxiliary rotary piston, wherein a working gas can be transferred via at least one duct from at least one of the working chambers into at least one other of the working chambers.

Abstract: The invention relates to a portable digital Computer with an in-built coupling device which is arranged in order to receive mouse Signals from a radio mouse provided with a battery and fed by said battery. Said digital Computer comprises an in-built current source and an electric interface which is installed in a fixed manner and which is connected to the current source, the electric interface being arranged such that the battery can be charged. The invention also relates to an input device for a portable digital Computer comprising a radio mouse and an additional slide pad which is arranged on the top side of said radio mouse. The invention further relates to a special coupling bay comprising a recess which is a notebook.

Abstract: A method for transmission of a user data record to a user station. The method features the following steps: (i) transmitting the user data record as a broadcast data record via a network system including at least two networks capable of data transmission, of which at least one is designed as a broadcast network in which a network identification of the broadcast network used for transmission is added to the broadcast data record prior to transmission in the respective broadcast network; (ii) extracting at least the network identification last added to the broadcast data record at reception of the last used broadcast data records from this broadcast data record; and (iii) forwarding at least the last network identification to the user station for allowance of at least the last network identification in connection with the user data record usage.

Abstract: The invention relates to a portable digital Computer with an in-built coupling device which is arranged in order to receive mouse Signals from a radio mouse provided with a battery and fed by said battery. Said digital Computer comprises an in-built current source and an electric interface which is installed in a fixed manner and which is connected to the current source, the electric interface being arranged such that the battery can be charged. The invention also relates to an input device for a portable digital Computer comprising a radio mouse and an additional slide pad which is arranged on the top side of said radio mouse. The invention further relates to a special coupling bay comprising a recess which is a notebook.