Patent ID: 6018302
Filing Date: 2000-01-25
Classification: G01C,G01R

Abstract:
An aircraft navigation display for use in an aircraft navigation system including a navigation receiver operable for receiving navigation signals from navigation transmitters, said navigation display comprising:a display comprising indicia representative of a navigational parameter of the aircraft;an indicia indicator shiftable relative to said display;shifting means for shifting said indicator in response to the navigation signals, said shifting means comprising a stepper motor coupled with said indicator for shifting said indicator relative to said display in response to the navigation signals to indicate the navigational parameter of the aircraft represented by the navigation signals; and, wherein said stepper motor comprises a drive shaft for coupling with a indicator drive axle, said navigation display further comprising gear reduction means coupled between said stepper motor and said indicator drive axle for reducing the rotational speed of said drive axle relative to said drive shaft for increasing the torque delivered to said indicia indicator via said drive axle by said stepper motor; anda dial string mechanism coupled between said stepper motor and said indicator.