An inspection and measuring apparatus comprises a housing, having a holder for supporting a workpiece for rotation about a first vertical axis and for limited rotation about an orthogonal axis, a light beam supported out from a second vertical axis for positioning for selective interruption by the workpiece...http://www.google.co.uk/patents/US4972090?utm_source=gb-gplus-sharePatent US4972090 - Method and apparatus for measuring and inspecting articles of manufacture for configuration
