| 摘要 |
<p>23 48,467 An elevator system having an elevator car operable in the up and down travel directions in a selected one of first and second speed modes. The elevator system develops a bi-directional speed pattern signal from a selected one of first and second unidirectional speed pattern input signals, with the polarity of the bi-direc-tional speed pattern signal being responsive to the selected travel direction.</p> |
