| 摘要 |
<p>A stage installation for vertical movement of multiple stage elements (10) has a computer controlled winch assembly comprising a support member (40a) having a channel (42), a platform (48) adjacent the support member (40a), electrical control and electrical power raceways (46, 44) in the channel (42), and a multiplicity of winches (50) supported on the platform (48). The winches (50) include a housing (52), a bidirectional servomotor (58), a rotating drum (54) driven by the motor (58) in either direction to haul or pay out cables (30) operatively connected to the stage elements (10). Connectors (60, 62) are coupled to the electrical power and electrical control raceways (44, 46), and a remote computer terminal (80) transmits signals to the winches (50) to initiate and terminate operation of the servomotor (58).</p> |
