Temperature-compensated pressure switches for controlling gas blast circuit interrupters

Claim 1

A DUAL-PRESSURE CLOSED-CYCLE-SYSTEM COMPRESSED-GAS CIRCUIT INTERRUPTER OPERABLE OVER A RELATIVELY WIDE AMBIENT TEMPERATURE RANGE INCLUDING A TANK STRUCTURE HAVING A PAIR OF TERMINAL BUSHINGS EXTENDING THEREIN, AN ARCEXTINGUISHING ASSEMBLAGE INCLUDING SEPARABLE CONTACT MEANS DISPOSED WITHIN THE TANK STRUCTURE AND AT LEAST PARTIALLY SUPPORTED BY THE INTERIOR ENDS OF THE TERMINAL BUSHINGS, A HIGH-PRESSURE TANK ASSOCIATED WITH SAID ARCEXTINGUISHING ASSEMBLAGE, BLAST-VALVE MEANS SYNCHRONIZED WITH THE SEPARATION OF SAID SEPARABLE CONTACT MEANS TO RELEASE A BLAST OF GAS FROM SAID HIGH-PRESSURE TANK TO ASSIST IN ARC EXTINCTION, THE EXHAUSTED GAS COLLECTING WITHIN THE GENERAL INTERIOR OF SAID TANK STRUCTURE, THE TANK PRESSURE BEING LOWER THAN THE PRESSURE WITHIN SAID HIGHPRESSURE TANK, THE INTERRUPTING ABILITY OF THE CIRCUIT INTERRUPTER BEING DEPENDENT UPON BOTH THE PRESSURE AND DENSITY OF THE STORED GAS, THE PRESSURE-TEMPERATURE CHARACTERISTICS OF THE INTERRUPTING GAS CAUSING AN INCREASED PRESSURE OF THE GAS AT THE HIGHER AMBIENT OPERATING TEMPERATURES, COMPRESSOR MEANS FOR RECOMPRESSING THE EXHAUSTED GAS WITHIN THE TANK STRUCTURE AND FORCING THE RECOMPRESSED GAS BACK INTO THE HIGH-PRESSURE TANK FOR SUBSEQUENT OPENING OPERATIONS OF THE INTERRUPTER, GASPRESSURE CONTROL MEANS INCLUDING A CONSTANT-DENSITY GASCONTROL SWITCH FOR SENSING THE DENSITY OF THE INTERRUPTING