| 摘要 |
<p>Apparatus for use with a sliding door, the sliding door being suitable for human and/or vehicular access, the apparatus comprising: a first system; and a second system; wherein the first system is for operating on a cable (12), the cable (12) being from a cable pulling system (6) to either the sliding door or an anchor point; the first system may be changed between a first condition and a second condition; the first condition substantially permits movement of the cable (12) by the cable pulling system (6); the second condition substantially opposes movement of the cable (12) by the cable pulling system (6); the second system is arranged to change the first system from the second condition to the first condition after a time period; and the second system comprises a mechanical timer (8) for timing the time period.</p> |
