| 摘要 |
<p>An iron core for the magnetic induction of a visual information displaying element with a magnetic tilting plate, where the display element is containing one or more permanent-magnetic tilting plates having been magnetized perpendicularly to its face and being suitable for the direct or indirect display of the information, furtheron it is provided with one or more exciting coils with an iron core made of hard magnetic material with a repolarizable remanent induction being suitable for producing a magnetic field and with a coercitive force being less than the coercitive force of the permanent magnet in the tilting plate. On the end of the hard-magnet core facing the displaying element a profiled body is closely fitted, which is made of a magnetic material having a higher initial permeability, than the initial permeability of the iron core and which is provided with a profiled cut-out corresponding to the cross-section of the end of the hard magnet iron core. </p> |
