A box-shaped module has a design whereby the automated manufacture and assembly of these modules and their components is possible in simple, sequential steps. For this purpose, a housing shell is provided with conical spigots for positioning a printed circuit board and a ground terminal. The latter is...http://www.google.com/patents/US5218518?utm_source=gb-gplus-sharePatent US5218518 - Rack mountable box shaped module with conical positioning elements
