| 摘要 |
<p>The system uses spring biased levers acting on switches to guarantee rapid switch change when movement is detected. The position detector includes a pushbutton (3) on which a coaxial spring (7) exerts a repulsive force. The pushbutton acts the control elements (600) for switches (60,61) inside the casing (2). The system includes a biased vertical lever (5) solidly attached to a shaft (51) mounted to rotate about a horizontal axis, and coupled to further independent horizontal levers (52,53) co-operating with a hairpin spring (55). In the normal state, the switches (60,61) are operated by the horizontal levers (52,53) When an object is detected by the pushbutton movement, the pushbutton acts on the system of levers and the switches change to th rest position at the correct fast speed.</p> |
