Patent ID: 6724314
Filing Date: 2004-04-20
Classification: B64F

Abstract:
An apparatus for positioning one end of a moveable bridge in relation to a door on a craft comprising:a sensor for transmitting light and for detecting said light, to determine the position of the one end of the moveable bridge in relation to the craft and for providing a signal in dependence thereon; and, a processor for receiving the signal from the sensor and for determining a next movement of the one end of the moveable bridge in dependence upon the signal, the processor also for determining an error factor in the determination of the next movement of the one end of the moveable bridge and for performing one of i) stopping the movement of the one end of the moveable bridge prior to performing the determined next movement and in dependence upon the determined error factor being within a first predetermined range of values, and ii) automatically performing the determined next movement of the one end of the moveable bridge in dependence upon the determined error factor being within a second other predetermined range of values not overlapping the first predetermined range of values.