Patent ID: 7475613

Claim:
A mechanism comprising a motor providing rotation about a first axis mounted in a sphere which in turn is mounted in an arcuate member providing for rotation of the sphere about a second axis coaxial with that of the arcuate member, the arcuate member being mounted to be pivotable about a third axis orthogonal to said second axis and first and second drive means being provided for, respectively, effecting movement of said sphere relative to said arcuate member and effecting movement of said arcuate member about said third axis, wherein said first drive means is pivotally mounted on said arcuate member and rotates a first screw shaft acting against a first nut that is pivotally mounted on the sphere, and wherein said second drive means is pivotally mounted in relation to a fixed reference and rotates a second screw shaft acting against a second nut that is pivotally mounted on said arcuate member.