A circuit board system resiliently mounts a plurality of daughter boards with high circuit interconnection density on a mother board using pairs of mating connectors having welded contact members accommodated in novel arrangements in the respective connectors to permit high density of electrical interconnection...http://www.google.co.uk/patents/US4776804?utm_source=gb-gplus-sharePatent US4776804 - Circuit board systems, connectors used therein, and methods for making the connectors and systems
