Abstract: The invention relates to a potential distribution system for the potential distribution to consumers and suited connectors. The potential distribution system contains a central supply line to which connectors can be joined to the consumer by means of a clamping device, preferably a cutting-clamping device, at freely selectable points. Each connector contains a self reset fuse for the consumer.

Abstract: A device for detecting a trailer coupled onto a tractor vehicle which, incorporates the rear or brake or license plate illuminating lights of the trailer and by corresponding combination of the signals applied at a logic element, an output signal for triggering the indication "trailer coupled" is achieved.

Abstract: A preliminary heating control installation for air-compressing internal combustion engines, especially in motor vehicles, with a device for the control of the preliminary heating time as a function of engine temperature and of a time limit, with a relay whose energizing winding is connected in the heating circuit and whose contact controls an indicating lamp, and with an additional circuit that detects the failure of at least one or several heater plugs and renders this defect visible by engagement of the indicating lamp during the duration of the starting operation or therebeyond.

Abstract: An installation for the continuous measurement of the fuel consumption of internal combustion engines, in which a fuel-metering member predetermining with its position the through-put fuel quantity as a function of displacement. A preferably electrical displacement pick-up is coupled with the fuel-metering member which produces an analog signal corresponding to the deflection of the fuel-metering member from its normal position while an instrument for the indication of the signal is arranged within the field of vision of the operating person.

Abstract: An ignition device for a passive retention system, especially in motor vehicles, in which an ignition unit arranged in a housing includes two plug pins which freely project on one side with their free end out of a casing and which are intended for slidingly receiving thereon a plug coupling, while the two plug pins are connected at the other end with an incandescent bridge and are surrounded by an ignition or primer mixture disposed inside of a casing; protective contact means are provided which protect the plug pins against electrostatic charges by short-circuiting the same prior to the emplacement of the plug coupling on the plug pins; the protective contact means consist of an essentially U-shaped elastic clamp which electrically conductively connects with each other the plug pins, when the plug coupling is not inserted, and which is automatically opened, when the plug coupling is inserted, in such a manner that the clamp interrupts the contact between the plug pins only when the regular ignition circuit h

Abstract: An ignition device for a passive retention system, especially in motor vehicles, in which an ignition unit fitted into a housing includes two plug pins which protrude on one side with their free ends out of a covering and which, on the other side, are connected with a heater bridge and are surrounded by an ignition substance within a casing.