Abstract: An apparatus to provide control signals to a line containing a regulating valve for metering predetermined amounts of liquid in which the output of a flow meter is converted to a frequency, the frequency counted in two counters, one of which has been preset with a lead, and the outputs of the counters compared in comparators with a predetermined desired liquid volume, the comparator outputs being used respectively to reduce the flow and then eventually terminate the flow, the reduction and final termination giving a fine metering at the end of the cycle of operation.

Abstract: An arrangement for detecting dielectric breakdowns in a metal-clad, high-voltage installation made up of a plurality of component sections includes a thermal sensor for each of the sections wherein a dielectric breakdown may occur for sensing the temperature. The output of the thermal sensors feed a comparator which forms an output signal from at least two discrete signals from the thermal sensor. A circuit arrangement corresponding to the comparator identifies the thermal sensor associated with the component section wherein a dielectric breakdown has occurred.

Abstract: A device for measuring an electrical quantity at high-voltage potential includes a light-wave conductor for conducting light to a measuring sensor on the high-voltage side. A reflecting surface is arranged at the end of the measuring sensor that faces away from the light-wave conductor; this reduces the length of the light-wave conductor required. The light beam is reflected at the reflecting surface and leaves the light-wave conductor at low-voltage potential as a modulated light beam.