H - Electricity – 05 – K
Patent
H - Electricity
05
K
H05K 7/18 (2006.01)
Patent
CA 2097348
The invention addresses both the seismic and electromagnetic emissions requirements in the area of the frame where the upright frame members and the top frame member and base frame member are interconnected. To this end, the top frame member has two offset extensions on each end which interlock with interiorsurfaces of the upright frame members by projecting through notches in the upperportion of the upright frame members. The upright frame members and the top frame member are then welded together and the outer surfaces of the welded members are ground flush to provide smooth continuous planar electromagnetic interference (EMI) gasket mating surfaces. An additional reinforcing offset member is positioned against and along each end of the top frame member in the area which engages the interior wide flange portion of each of the upright frame members. These additional reinforcing offset members project through notches in both the top frame member and the corresponding upright frame members. The reinforcing offsetmembers are fillet welded to both the top frame member and the upright frame members. Another additional reinforcing angle member is attached to each of the upright frame members in the area of their bottom internal wide flanges and are fillet welded to the corresponding upright frame members. The upright frame members are welded to the base frame member and the outer surface of the welds is groundflush to provide smooth continuous planar EMI gasket mating surfaces. (FIG. 1)
American Telephone And Telegraph Company
Kirby Eades Gale Baker
LandOfFree
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