Apparatus for sharpening and polishing bevels of sanitary needles for injections. (Machine-translation by Google Translate, not legally binding)

摘要

By consisting of a lever provided with a counterweight at its end that ends on the other on an axis on which is mounted a cylinder composed of two stone discs the one thicker grain than the other in order that one serves to wear or sharpen and the other to polish. (Machine-translation by Google Translate, not legally binding)