Bypass switch control means for series capacitor installations

Claim 1

IN A SERIES CAPACITOR INSTALLATION FOR A POLYPHASE ALTERNATING CURRENT LINE HAVING A CAPACITOR ADAPTED TO BE CONNECTED IN SERIES IN EACH PHASE OF THE LINE, A PROTECTIVE SYSTEM INCLUDING A BYPASS SWITCH CONNECTED ACROSS EACH OF SAID CAPACITORS, EACH OF SAID SWITCHES BEING ADAPTED TO BE ACTUATED TO OPEN POSITION BY PNEUMATIC PRESSURE, INDIVIDUAL AIR SUPPLY MEANS FOR EACH SWITCH, PNEUMATICALLY ACTUATED SWITCH CONTROL VALVE MEANS FOR EACH SWITCH FOR APPLYING PNEUMATIC PRESSURE FROM THE AIR SUPPLY MEANS TO EFFECT OPENING OF THE SWITCH, MEANS RESPONSIVE TO PREDETERMINED CONDITIONS OF THE SERIES CAPACITOR INSTALLATION FOR EFFECTING CLOSING OF EACH BYPASS SWITCH, MEANS RESPONSIVE TO LOSS OF AIR PRESSURE IN EACH OF SAID AIR SUPPLY MEANS FOR EFFECTING CLOSING OF THE CORRESPONDING SWITCH, AND A CONTROL SYSTEM FOR SAID SWITCHES REMOTE FROM THE PROTECTIVE SYSTEM, SAID CONTROL SYSTEM INCLUDING AN ELECTRICALLY OPERATED MAIN CONTROL VALVE FOR APPLYING PNEUMATIC PRESSURE FROM A MAIN AIR SUPPLY TO SAID SWITCH CONTROL VALVE MEANS OF ALL THE BYPASS SWITCHES, AN ELECTRICALLY OPERATED AIR SUPPLY FOR CONTROLLING AIR FLOW FROM THE MAIN AIR SUPPLY TO SAID INDIVIDUAL AIR SUPPLY MEANS OF ALL THE SWITCHES, MEANS FOR ACTUATING SAID MAIN CONTROL VALVE TO OPERATE THE SWITCH CONTROL VALVE MEANS TO EFFECT SUBSTANTIALLY SIMULTANEOUS OPENING OF ALL THE BYPASS SWITCHES, MEANS FOR ACTUATING SAID AIR SUPPLY VALVE TO CUT OFF THE AIR SUPPLY TO EFFECT SUBSTANTIALLY SIMULTANEOUS CLOSING OF ALL THE BYPASS SWITCHES, AND MEANS OPERATIVE WHEN THE SWITCHES ARE OPEN TO EFFECT ACTUATION OF THE AIR SUPPLY VALVE IN RESPONSE TO CLOSING OF ANY ONE OF THE SWITCHES TO CAUSE IMMEDIATE CLOSING OF THE REMAINING SWITCHES.