Seismic network bay frame
US5233129A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Oct 15, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
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 interior surfaces of the upright frame members by projecting through notches in the upper portion of the upright frame members. The upright frame members and the top frame member are then welded together and the other 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 offset members 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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.