US Patent 7385147 Articulated mast

Apparatus for housing electrically powered components to protect such components from damage and interference caused by lightning strikes and other externally generated magnetic fields. On embodiment includes a shielded enclosure mounted on an electrically groundable platform mounted on legs. An extendable and retractable mast is disclosed and may be supported on the platform and electrically grounded thereto. In another embodiment, the platform is portable and the shielded enclosures may be mounted to the electrically groundable platform by shock absorbers and be electrically grounded thereto. Adjustable outriggers may also be mounted to the platform.