| 摘要 |
<p>This invention relates to a timed control apparatus for an electrical user requiring a manual connection and disconnection comprising at least one gear element (10) associated with the timing device, at least one gear element (12) associated with the acoustical signalling device, according to which both said gear elements (10, 12) meshing during timing period, provide zones (5a, 5b) of the profile without toothing.</p> |
