| 摘要 |
1. Method of making a tore shaped magnetic core (10), particularly of a differential transformer, wherein a magnetic iron strip (12) is wound in spiral, the strip (12) portion forming the last outer turn of the winding being stamped before the winding to form at the beginning of said portion a fixation tongue (22) and at the end an aperture (18), through which the tongue is brought after the winding of said portion, characterized in that the strip (12) is wound on an automatic rotating device, that the tongue (22) is stamped before winding of the last turn, taking care to bent slightly the tongue outsides the winding, so that the tongue (22) is brought through said aperture (18) during the continued rotation and projects from the winding and that a turn down device (24) is brought on the rotation trajectory of the winding to form an abutment against which the projecting tongue abuts during the continued rotation and is automatically turned down. |
