A method for confining circuit cards to different locations within a housing is provided. The housing includes a frame having an array of slots, each containing one of the circuit cards. In one embodiment, the receptacle has a cam that is selectively engageable with the frame for clamping the circuit...http://www.google.de/patents/US6992249?utm_source=gb-gplus-sharePatent US6992249 - Clamping receptacle
