| 摘要 |
<p>There is disclosed a control arrangement for a trolley (11) having a handle (21) by which a driving motor (17) is controlled, the handle (21) working a transducer (22) providing control signalling for said motor (17) and having limited movement relative to the trolley (11) in the fore and aft direction (23) but being stiffly connected to the trolley (11) in the vertical (24) and lateral (25) directions whereby the trolley (11) can be manually controlled by the handle (21) in pitch and yaw, in which the transducer (22) comprises a switch biased to one of two (on/off) positions which on operation of the handle to pull the trolley (11) along actuates a controller (19) to ramp up motor voltage in a predetermined fashion and when the switch returns under its bias to its position indicating lack of demand for further acceleration actuates the controller (19) to ramp down the motor voltage.</p> |
