Interrupting structure and gas-control arrangement for compressed-gas circuit interrupter

Claim 1

THE COMBINATION IN A COMPRESSED-GAS CIRCUIT INTERRUPTER OF A PRESSURIZED ENCLOSURE CONTAINING AN ARC-EXTINGUISHING GAS UNDER PRESSURE, AN INTERRUPTED ASSEMBLY AND A SERIALLY CONNECTED DISCONNECTING SWITCH STRUCTURE DISPOSED WITHIN SAID PRESSURIZED ENCLOSURE, SAID INTERRUPTING ASSEMBLY INCLUDING ONE OR MORE PISTON-ACTUATED CONTACTS SEPARABLE TO ESTABLISH AN ARC, SAID DISCONNECTING SWITCH STRUCTURE INCLUDING AN OPERATING CYLINDER AND AN OPERATING PISTON SECURED TO A GENERALLY ROD-SHAPED MOVABLE DISCONNECTING CONTACT, THE OPERATING PISTON BEING MOVABLE WITHIN SAID OPERATING CYLINDER, THE OPENING SIDE OF THE OPERATING PISTON WITHIN THE OPERATING CYLINDER BEING CONSTANTLY AT A RELATIVELY LOW PRESSURE, SAID ROD-SHAPED MOVABLE DISCONNECTING CONTACT HAVING AN END PORTION SUBJECT TO THE PRESSURE WITHIN SAID PRESSURIZED ENCLOSURE FOR MOVING IT IN THE OPENING DIRECTION, AND MEANS FOR ALTERNATING THE PRESSURE ON THE CLOSING SIDE OF THE OPERATING PISTON FROM TANK PRESSURE TO SAID RELATIVELY LOW PRESSURE FOR EFFECTING THE RESPECTIVE CLOSING AND OPENING MOVEMENTS OF THE MOVABLE DISCONNECTING CONTACT.