Three axes controller

A three axes controller comprising;

• a support platform,
• a first carriage,
• a first linear bearing mounting said first carriage on said support platform for movement in the direction of a first axis fore and aft of a first neutral position,
• first centering means normally urging said first carriage to said first neutral position,
• a second carriage,
• a second linear bearing mounting said second carriage on said first carriage for movement in the direction of a second axis fore and aft of a second neutral position,
• second centering means normally urging said second carriage to said second neutral position,
• a third carriage,
• a third linear bearing mounting said third carriage on said second carriage for movement in the direction of a third axis fore and aft of a third neutral position,
• a third centering means normally urging said third carriage to said neutral position,
• said first, second and third axes being orthogonally arranged and having a common origin when said carriages are in said first, second and third neutral positions,
• a control lever having a proximal end and a distal end,
• gimbal means mounting said control lever on said first carriage at a point spaced from the proximal and distal ends of the control lever for gimballed movement relative to said first carriage while retaining said lever against longitudinal movement relative to said first carriage in the direction of said first axis,
• universal joint means at the distal end of said control lever mounting said distal end in said third carriage for universal movement with respect thereto in response to gimballed movement of the control lever,
• said universal joint having a center of gyration coincident with the common origin of the orthogonally arranged axes when the first, second and third carriages are located in their neutral position,
• said control lever having a longitudinal axis aligned with said first axis when said carriages are all in their neutral position whereby movement of the lever in a direction of its longitudinal axis effects movement of said first carriage in a direction of said first axis,
• first signal means having first and second components mounted on said support platform and said first carriage respectively,
• said first signal means being operative in response to movement of its first component with respect to its second component to generate an electrical signal proportional to the displacement of said first carriage with respect to said platform from said first neutral position,
• second signal means having first and second components mounted on said first carriage and said second carriage respectively,
• said second signal means being operative in response to movement of one of its components relative to the other to generate an electrical signal proportional to the displacement of said second carriage with respect to said first carriage from said second neutral position,
• third signal means having first and second components mounted on said second and third carriages respectively,
• said third signal means being operative in response to movement of one of its components relative to the other to generate an electrical signal proportional to the displacement of said third carriage with respect to said second carriage from said third neutral position.