Pneumatic control means for air blast circuit breaker

Claim 1

ELECTRICAL CIRCUIT BREAKER ARCING CHAMBER COMPRISING A SOURCE OF AIR UNDER PRESSURE, HOUSING MEANS CONTINUOUSLY CONNECTED TO SAID SOURCE OF AIR UNDER PRESSURE INCLUDING AN ELECTRICALLY INSULATING LATERAL WALL, FIRST AND SECOND FIXED HOLLOW CYLINDRICAL CONTACT MEMBERS SPACED OPPOSITED EACH OTHER ALONG A COMMON AXIS WITHIN SAID HOUSING MEANS, SAID FIRST AND SECOND FIXED MEMBERS EXTENDING THROUGH AND BEING SECURED TO RESPECTIVE END WALLS OF SAID HOUSING MEANS AND EACH HAVING A BLAST VALVE FOR SELECTIVELY CONNECTING THE SPACE INSIDE SAID FIXED MEMBERS WITH THE ATMOSPHERE IN THE OPEN POSITION THEREOF, AND SEALING SAID SPACE INSIDE SAID FIXED MEMBERS FROM THE ATMOSPHERE IN THE CLOSED POSITION THEREOF, A REMOVABLE HOLLOW CYLINDRICAL CONTACT MEMBER SLIDABLY MOUNTED ON SAID FIRST FIXED MEMBER AND OPERABLE TO RECIPROCATE FROM A FIRST OPEN POSITION TO A SECOND CLOSED POSITION IN ENGAGEMENT WITH AN END PORTION OF SAID SECOND FIXED MEMBER, MEANS FOR ENSURING A CONTINUOUS ELECTRICAL CONTACT BETWEEN SAID MOVABLE MEMBER AND SAID FIRST FIXED MEMBER, MEANS FOR ENSURING AN ELECTRICAL BETWEEN SAID MOVABLE MEMBER AND SAID SECOND FIXED MEMBER UPON ENGAGEMENT THEREOF, MEANS FOR CONTROLLING THE POSITION OF SAID MOVABLE CONTACT MEMBER INCLUDING OPENING MEANS FOR EFFECTING RECIPROCATION THEREOF TO SAID SECOND CLOSED POSITION AND MEANS FOR CONTROLLING THE OPENNG OF SAID AIR