A three-axis stabilized platform is disclosed wherein the azimuth, or train axis, a cross-level axis and an elevation axis intersect each other at a substantially common pivot point. Each axis supports a pivotable member which includes sensing and drive means for correcting the position of that member...http://www.google.es/patents/US5419521?utm_source=gb-gplus-sharePatente US5419521 - Three-axis pedestal
