Machine for hardness testing of metals (Machine-translation by Google Translate, not legally binding)

摘要

A machine for testing the hardness of metals, characterized in that it consists essentially of a pump body, a plate, a rod and a ball, also having, as accessory elements, a piston driven by a lever, of two ball shutters, one connecting rod, two other balls, a platform and a manometer. (Machine-translation by Google Translate, not legally binding)