Dynamic torque monitoring device

Apparatus for dynamically testing a rotational torque device under conditions simulating actual operating conditions, the rotational torque device having a rotating portion and a relatively stationary portion, comprising:

• a rigidly supported load transducer means for sensing the torque produced by the rotational torque device being dynamically tested and for producing as an output a signal indicative of the torque developed by the rotational torque device;
• controllable loading means cooperatiely engaged with the load transducer means for coupling with the rotational torque device being dynamically tested and for applying a controlled load to the rotational torque device;
• means for initiating the loading of the controllable loading means;
• circuit means responsive to the initiating means for generating an intermediate control signal, the magnitude of which increases from an initial value at a constant, predetermined rate;
• circuit means for limiting the magnitude of the intermediate control signal thereby producing a magnitude limited control signal;
• buffer means for receiving the magnitude limited control signal and for controlling the loading on the controllable loading means therewith so as to gradually increase the loading;
• and
• means for monitoring the signal indicative of the torque produced by the rotational torque device being tested.