A plug and socker connector for a printed circuit board has the socket part open at the bottom so that it can be attached to the board by latches engaging in openings in the board, leaving conductive tracks on the board exposed within the socket part. A plug has external resilient contacts so that when...http://www.google.com.hk/patents/US5035641?utm_source=gb-gplus-share專利 US5035641 - Terminating insulated conductors
