Device for use in magnetic fields with north or south polarities, has circular permanent magnet of predetermined diameter and thickness having north- and south-pole ends covered by polarizing filters

摘要

A circular permanent magnet with a diameter of 6.5 mm and thickness of 1 cm has north- and south-pole ends covered by polarizing filters. The magnet is turned clockwise or counter clockwise in a horizontal plane by a handle, generating variable magnetic current.