Circuit interrupters with crossbars captively related to piston structures

Claim 1

A CIRCUIT INTERRUPTER INCLUDING A SINGLE GROUNDED TANK, THREE PAIRS OF TERMINAL BUSHINGS EXTENDING INTO THE TANK, AN INTERRUPTING UNIT SECURED TO THE LOWER END OF EACH TERMINAL BUSHING, A RELATIVELY STATIONARY CONTACT ASSOCIATED WITH EACH INTERRUPTING UNIT, A COOPERABLE MOVABLE CONTACT, ORIFICE-TYPE GAS-PISTON MEANS FOR EACH UNIT INCLUDING AN OPERATING-CYLINDER ELEMENT AND A PISTON ELEMENT, SAID ELEMENTS BEING MOVABLE RELATIVE TO EACH OTHER TO COMPRESS GAS, MEANS SECURING THE MOVABLE CONTACT OF EACH UNIT TO ONE OF SAID ELEMENTS, SPRING MEANS SITUATED ADJACENT THE BOTTOM OF EACH UNIT TO BIAS THE RESPECTIVE MOVABLE CONTACT IN AN OPENING DIRECTION, A CONDUCTING CROSS-BAR FIXEDLY SECURED TO THE MOVABLE CONTACT OF EACH INTERRUPTING UNIT, AN INSULATING LIFT ROD DISPOSED INTERMEDIATE THE UNITS AND ACTUATING THE CONDUCTING CROSS-BAR, AN ACTUATING BELL-CRANK LEVER PIVOTALLY CONNECTED TO THE UPPER END OF EACH OF THE THREE LIFT RODS, A GENERALLY HORIZONTALLY-EXTENDING OPERATING ROD PIVOTALLY CONNECTED TO EACH OF THE BELL-CRANK LEVERS, AND MEANS FOR EFFECTING GENERALLY LONGITUDINAL HORIZONTAL RECIPROCAL OPENING AND CLOSING MOVEMENT OF THE OPERATING ROD, AND A SINGLE SHOCK-ABSORBING SYSTEM ASSOCIATED WITH THE OPERATING ROD.