| 摘要 |
<p>The invention relates to the improvement and further development of an electromagnetically controlled door opener. …<??>Known door openers have a powerful electromagnet which pulls up a spring-loaded armature. A specific electrical energy is needed for the lifting work. …<??>The object of the invention is to reduce the magnet volume and the power requirement. In the solution, the lock plate carries a tangentially acting wedge, this acts on a driving slide, a control slide is connected resiliently to this, and when an opening pulse occurs an electromagnet retains the control slide. Depending on the position of the control slide, a blocking surface of the lock plate runs up against a blocking pin or past this. …<IMAGE>… </p> |
