Abstract: A torque transducer comprises strain measuring means on a torque deformable shaft and slipring means for transmitting the torque signals from the rotating shaft to stationary brush means. The slipring means are annular disc of carbon material, such as sintered graphite and the brush means are individual strips of flexible metal passing under tension partially around the respective sliprings. The electrical contact between the strain sensing means and the carbon disc is by means of printed circuit boards each of which has an annular or substantially annular portion with its conductive coating in face-to-face contact with a face of a respective carbon disc. The carbon disc and printed circuit boards being in axial compression on the shaft.

Abstract: An angular motion detector, of particular relevance in breakaway point detection, includes a flywheel rotatably mounted on a spindle. The flywheel is provided with one or more indicia, which are detectable by a sensor situated on the object whose angular motion is to be analyzed. The sensor is connected to a microprocessor. In use the flywheel is rotated manually about the spindle so that the regular detection of the indicia by the sensor causes a train of pulses to be sent to the microprocessor. Angular movement of the object, and consequently of the sensor, causes a disruption of the pulse train which can be analyzed to provide information relating to the time of first movement and the magnitude of the angle moved.