Abstract: A system (1) has a battery (2) provided with a first contact pole (9), a second contact pole (10) and two connection lines (3, 4) each of which has the first (11) and second (12) ends associated with the contact pole (9, 10) in such a way that one end is electrically connected to the pole on the first end (11, 12) and the other is connectable to a user on the second end (21, 22). In the presence of dangerous products, conventional systems involve short circuit risks resulting from inadmissible temperature development. A remedy is provided in which the first end (11) of the connection line (3) is assigned to the end of the first contact pole (9) and a constant-ohmic resistance (30) is electrically connected to the first contact pole (9).

Abstract: It is proposed to assign a mounting arm to a toll calculator which is embodied as a surface-mounted device and which is connected in an articulated fashion to the toll calculator and can be mounted on the windshield of the motor vehicle. The toll calculator itself then rests with a relatively small area on the dashboard of the motor vehicle with the intermediate connection of a preferably elastomer supporting element which is preferably coated with adhesive on two sides.

Abstract: It is proposed to assign a mounting arm to a toll calculator which is embodied as a surface-mounted device and which is connected in an articulated fashion to the toll calculator and can be mounted on the windshield of the motor vehicle. The toll calculator itself then rests with a relatively small area on the dashboard of the motor vehicle with the intermediate connection of a preferably elastomer supporting element which is preferably coated with adhesive on two sides.

Abstract: A magnetic field sensor consists of a cylinder (2) with a core of premagnetized amorphous ferromagnetic metal. The inductance of the coil (2) is controlled by earth magnetic field H.sub.E and forms part of an L.C. oscillator (1). An adjusting device is provided to smooth out fluctuations from a target value in the oscillator frequency caused by the action of the field H.sub.E on the oscillator coil (2). This is done by allowing another adjustable magnetic field to influence the inductance (2) of the oscillator (1): the adjustable magnetic field is generated by a second coil (3) in the form of a compensating coil and the current flux (1) through the second coil (3) is controlled by the adjusting device in such a way that the magnetic field generated by the second coil (3) compensates for the action of the field H.sub.

Abstract: A data-transmission device has a pulse generator (1) and a monitoring unit (20) for use in a vehicle. A signal generated by the sensor (2) is transmitted from the pulse generator (1) to the monitoring unit (20) by a signal line (9) and also, when requested by the monitoring unit, is transmitted in encrypted form along a data line (19). The signal generated by the pulse generator (1) is first stored in an intermediate store. Before transmission, the contents of this store are encrypted. On arrival in the monitoring unit, the encrypted signal is compared with the signal previously transmitted in the usual way and recorded there. This is a security check which reveals any manipulations which have been made during transmission.

Abstract: An apparatus for recording driving data which comprises a data gathering device, which further comprises a sensory measuring device, a control unit, an A/D converter, a plurality of parallel ring storage devices and a semiconductor storage device. Analog measurement signals, which are continuously detected by the sensory measuring device, for recording a vehicle movement, are continuously sensed by the control unit with two different frequencies after being digitized into digital measurement signals in the A/D converter. The digital signals are stored in the plurality of parallel ring storage devices with clock frequencies.