APPARATUS FOR MEASURING THE CHARGE OF ELECTRETS

摘要

The invention relates to an apparatus intended for measuring the electric charge of electrets. According to the invention, the apparatus consists of an electromagnetic vibrator whose mobile part is integral with a rod () placed in a horizontal position and provided, at its free ends with some disk-shaped electrodes () mounted by means of some electrically-insulating armatures () and some fastening pieces () and placed within the electric field of some electrets () to be assessed, each of them being in contact with another electrode (), each being placed, by means of some mounting means () within an adjustable support (), both of them being placed on a supporting surface (), the pairs of measuring electrodes () being connected to some oscilloscopes ().