UN DISPOSITIVO PERFECCIONADO DE ENSAYO DE DUREZA.

摘要

A hardness testing device of the type adapted to measure the hardness of workpieces by indentation of the surface stratum thereof by an indenter or penetrating device. The depth of penetration of the workpiece under a prescribed load applied to the penetrating device is proportional to the hardness of the workpiece, which in turn is visually and/or audibly communicated by a variable fluid flow sensing system associated with the penetrating means. The testing device is readily adapted for automatic operation to test individual workpieces at commercial production rates to assure they are within prescribed quality and/or hardness limits.