Importance

Loading Importance Indicators...

Abstract

A control arrangement for a motorised trolley having a handle by which to control a driving motor which propels the trolley. The handle works a transducer which supplies a control signal for the driving motor. Then handle has limited movement relative to the trolley in the fore and aft direction but is stiffly connected to the trolley in the vertical and lateral direction whereby the trolley can be manually controlled by the handle in pitch and yaw by the pedestrian operating the trolley. The motor is controlled in a proportional or integral manner to accelerate, to decelerate, or to maintain a constant (cruise) velocity of the trolley. The acceleration, deceleration and velocity maintenance are achieved by ramping and constant voltages applied, preferably by a microprocessor-based control system, to a D.C. shunt motor which drives one or more wheels of the trolley.

Loading the Abstract Image...

First Claim