Switchgear for high voltage power circuits with removable vacuum switch units

Claim 1

A HIGH VOLTAGE POWER SWITCH GEAR COMPRISING AT LEAST TWO CONTACT PAIRS INDIVIDUALLY ENCLOSED IN SEPARATE SERIES CONNECTED UNITS WHICH ARE EVACUATED AND VIRTUALLY FREE OF FLUID, SAID UNITS BEING ENCLOSED IN A FIRST, SEALED INNER CONTAINER WHICH IS SUPPORTED IN, AND ELECTRICALLY INSULATED FROM A SECOND, SEALED OUTER METAL CONTAINER WHICH ENCLOSES SAID FIRST CONTAINER, SAID CONTAINERS HAVING ALIGNED OPENINGS, THE EDGE OF THE OPENING OF THE OUTER CONTAINER BEING SEALED TO THE WALL OF THE FIRST CONTAINER, SAID OPENINGS BEING DIMENSIONED TO ALLOW PASSAGE OF THE SAID UNITS THERETHROUGH, A REMOVABLE COVERING BEING PROVIDED FOR THE OPENING OF THE INNER CONTAINER, INSULATING FLUIDS FILLING, AT LEAST PARTLY, THE FREE SPACES BETWEEN THE SAID CONTAINERS, AND WITHIN THE INNER CONTAINER, TERMINAL CONDUCTORS EXTENDING THROUGH AND INSULATED FROM A WALL OF THE OUTER CONTAINER, THE INNER CONTAINER HAVING A WALL PORTION OF NON-CONDUCTING MATERIAL SEPARATING AND INSULATING A PAIR OF END TERMINALS FROM EACH OTHER, SAID TERMINALS BEING DETACHABLY CONNECTED TO SAID TERMINAL CONDUCTORS AND TO END TERMINALS OF THE SERIES CONNECTED UNITS.