A docking mechanism docks a test head having a docking plate to a machine having a docking fixture when the docking plate is in a predetermined position with respect to the docking fixture. The test head has cam blocks which are moveable with respect to the docking plate. The docking fixture includes...http://www.google.ca/patents/US6407541?utm_source=gb-gplus-sharePatent US6407541 - Docking mechanism for semiconductor tester