A contactor assembly interconnects a surface mount integrated circuit device under test (DUT) with a test circuit. The assembly includes a main contact block with a central opening, a plug that mounts in the opening, and contact assemblies carried on the plug that each have contacts, a ground plane,...http://www.google.co.uk/patents/US4866374?utm_source=gb-gplus-sharePatent US4866374 - Contactor assembly for testing integrated circuits
