Patent ID: 8074940

Claim:
In a control stick mounted on a support and adapted to control the movement of an object, the improvement comprising: a support; a linkage for mounting a handle on said support for selective compound pivotal movement about two mutually-perpendicular axes to provide an input to said control stick, said linkage including: a first gimbal mounted on said support; an upper member mounted on said first gimbal, said upper member having a handle arranged above said first gimbal, and having a lower portion arranged below said first gimbal; an intermediate member; a second gimbal connecting said upper and intermediate members; and a lower member, one of said intermediate and lower members being movably mounted on the other of said intermediate and lower members to permit relative movement therebetween when said handle is moved relative to said support; a third gimbal connecting said lower member to said support; and a resilient member arranged to bias the direction of relative movement between said intermediate and lower members; whereby said handle may be grasped and selectively moved relative to said support to provide an input to said linkage.