Patent ID: 8181914

Claim:
In a control stick adapted to control the movement of an object, the improvement comprising: a support; an upper member mounted on said support for pivotal movement about a first pivotal axis, said upper member having an upper portion arranged above said first pivotal axis and having a lower portion arranged below said first pivotal axis; an intermediate member having an upper portion connected to said upper member lower portion for pivotal movement about a second pivotal axis, and having a lower portion; a lower member having a lower portion pivotally mounted on said support for pivotal movement about a third pivotal axis, and having an upper portion; and wherein said intermediate member lower portion is movably mounted on said lower member such that pivotal movement of said upper member upper portion relative to said support will produce pivotal movement of said intermediate and lower members relative to said support; a resilient member arranged to bias the direction of relative movement between said intermediate and lower members; and wherein the extent of movement between said intermediate and lower members when said upper member is moved off null is a function of the ratio of (a) the distance between said first and second pivotal axes, and (b) the distance between the said second and third pivotal axes.