| 摘要 |
<p>The points system, comprising two upstream rails (13, 14a) and one downstream rail (14b) with a pivoting switch (1), has a mechanism (3, 4) that positions the switch by rotating it as an object such as a door or trolley approaches along one of the upstream rails and before it reaches the switch. The mechanism consists of two levers that are pivoted relative to the rails and linked kinematically to the switch and cause it to turn as they are rotated.</p> |
