Abstract: Adjacent lying plug-connector halves, the front ends of which exhibit pin or sleeve shaped plug elements, are provided with first and second supporting bodies, of which the first supporting body, with a sleeve shaped plug element, may be connected by means of a joinable groove-tenon-interconnect lying crosswise to the plug insertion direction, and exhibits an entrance channel for a plug connector half with a pin shaped plug element. The second supporting body with a concentric guiding tube for the insertion of pin shaped plug elements from both directions exhibits a tenon-groove-interlock contour at both ends that matches that of a sleeve shaped plug element. The first supporting body can therefore be interlocked with second supporting bodies or sleeve shaped plug elements at choice, whereby light wave guides single or double plugs may be connected to transmit- and/or receive modules and light wave guides single or double plugs may be inter-connected.

Abstract: A torque wrench including an elongate deflection beam section. Two strain gauges are attached to the beam in longitudinal spaced relationship from the ends thereof and relative to each other. Each strain gauge is connected in a related cyclically energized measuring bridge, the output voltage of which is amplified and, under control of a switch, is conducted to and stored in a related measured value memory. The two stored measured value voltages are cyclically and alternatingly conducted to a micro-processor by means of an analog-to-digital converter. The micro-processor compares the measured value voltages and conducts a resulting signal to an indicating instrument which displays the resulting signal in force units.