A device for the comparative measurement of permanent magnets by means of the magnetic field of dispersion (Machine-translation by Google Translate, not legally binding)

摘要

A device for the measurement, comparison of the permanent magnets by means of the magnetic dispersion field, constituted by an electromagnetic type galvanometer, having on its rear face and perpendicular to it a cylindrical envelope, inside which a piece of ferromagnetic material that presents on its side surface a projection that moves through the longitudinal groove of the cylindrical body, its inner end being more or less spaced from the face of the galvanometer, which has a hole in correspondence with the situation of the displaceable bar. (Machine-translation by Google Translate, not legally binding)