| 摘要 |
<p>A safety device (10), for an electrically operated openable and closeable window, comprises pressure sensitive switch means (S1) operative to sense the presence of an obstruction to closing movement of said window and to activate switching means (T1). The switching means (T1) provides a demand signal for a drive system (30) of said window to cause opening movement of said window which opposes any other command signal for closing of said window. Prolonging means (C1, R2) is also provided operative to prolong said release demand signal for a predetermined length of time.</p> |
