| 摘要 |
<p>Apparatus for the remote individual control of a plurality of hydraulically-actuated operators comprises first and second signal pressure lines (A, B) connected from a pressure source (37) to supply selected pressure signals to a plurality of AND-gates (G1-G25) each having its output connected to a separate operator, and a pair of matrices (V1-V5, V6-V10) of series-connected valvepairs connected between the respective signal pressure lines and the respective inputs of the AND-gates to select the appropriate pressure signals, for the applicator to be energised and apply them to the two inputs of the AND-gates associated with that applicator, each AND-gate, when opened by said signals connecting the associated applicator to a source of pressure.</p> |
