| 摘要 |
<p>The on-off switch incorporates an auxiliary disconnection switch having transmission means to open the demagnetizing circuit of the apparatus in a retarded mode when closing the main circuit. It comprises a press-button (31) which actuates a tongue (15a) and at least one PTC thermistor (34) for the control of the electric supply to the circuit (12). The transmission means are comprised of two toothed wheels (24, 25) which are integral with each other, a third toothed wheel (26) in mesh with the wheel (24) and a rack (23) geared to the wheel (25). The displacement of the rack (23) compresses a torsion spring (30) housed in the wheel (24). The rack (23) has a pivot (23.1) in contact with a cam surface (28) of the carcass (16) to cause the decoupling of the rack (23) from the toothed wheel (24) in its back motion.</p> |
