Abstract: A device for measuring cycles of random reciprocal motion of an object, such as a control valve which moves in discrete movements of varying length between an opened and closed position, includes a cylindrical travel translator member biased within a housing by a coil spring to maintain tension on a cable connecting the travel translator member to the object, so that the travel translator member moves in a direction corresponding to and a distance proportional to that of the object. An elastomeric wheel frictionally engages the travel translator member to rotate a shaft which operates a mechanical counter, and through a cam, a limit switch which generates pulses representative of the random cycles of the object.

Abstract: A reactor vessel stud cleaning machine for cleaning reactor studs. The stud is supported horizontally by a pair of roller carriage assemblies inside of a closed chamber. At least one roller carriage assembly has rollers driven by a stud drive motor which cause the stud to rotate. As the stud rotates, a spray nozzle traverses the length of the stud spraying a mixture of high pressure water and abrasive onto the stud. The spent water and abrasive is drained from the enclosure and pumped through a separator funnel and filter bank to remove solids. The filtered water is returned to a supply tank for reuse. The stud rotation speed and spray nozzle traverse speed the variable as in the water pressure and rate of abrasive injection.