| 摘要 |
<p>The invention relates to a permanent magnet. In profile the permanent magnet has its North and South poles along one and the same line radial to its axis of rotation and has contours on the areas which carry the poles. The contours are with respect to the axis of rotation on the one hand, diametrically opposed; and on the other hand, situated at different distances from the axis, the fractions on the one hand, and on the other hand, of the zones being distanced differently depending on whether they are to one side or the other of the aforementioned radial line. The invention is applicable to bistable elements and to data display units consisting in at least one such bistable element.</p> |
