Coupling flex-plate construction for gas-insulated transmission lines

A high-voltage gas-insulated transmission-line capable of carrying relatively-heavy currents including a plurality of axially-aligned outer-disposed independent metallic grounded casing sections (6,7), means securing said independent metallic grounded casing sections (6,7) together in end-to-end axially-aligned fashion, a plurality of axially-aligned inner-disposed open-ended tubular high-voltage independent conductors (13,14) disposed centrally within said outer-disposed grounded axially-aligned casing sections (6,7), an insulating gas disposed within the annular space between the inner-disposed conductors (13,14) and the outer-disposed grounded metallic casing sections (6,7), a solid self-supporting flex-plate coupling member (15) interposed between the confronting open ends of two juxtaposed inner high-voltage conductors (13,14) and secured thereto to completely block the open confronting ends thereof, said solid self-supporting flex-plate coupling member (15) having a centrally-disposed, outer peripheral recess (17) thereby resulting in a substantially solid "H"-shaped cross-sectional configuration, whereby the solid inner central core position (19) of said solid self-supporting flex-plate coupling member (15) permits only lateral flexing motion of the inner-disposed conductors (13,14) yet nevertheless can carry relatively-heavy transmission-line currents.