Printed circuit formula card systems and their components

Claim 1

A CONTROL SYSTEM COMPRISING A NETWORK, A FIRST SET OF PLURAL RELATIVELY FIXED CONTACTS IN SAID NETWORK, A SECOND SET OF PLURAL RELATIVELY FIXED CONTACTS IN SAID NETWORK RESPECTIVELY RELATED TO THE RESPECTIVE CONTACTS IN SAID FIRST SET, A LINE COMMON TO EACH PAIR OF RELATED CONTACTS OF SAID FIRST AND SECOND SETS TO ESTABLISH A PLURALITY OF INCOMPLETE MAIN CIRCUITS, RELAYS IN EACH MAIN CIRCUIT AND EACH CONTROLLING A SWITCH, SAID NETWORK ESTABLISHING A SERIES CIRCUIT INCLUDING SAID SWITCHES, A RESISTOR ASSOCIATED WITH EACH RELAY AND CONTROLLED BY ITS SWITCH TO INSERT THE RESISTOR IN SAID SERIES CIRCUIT WHEN THE INSTANT RELAY IS ACTUATED, A FIRST PRINTED CIRCUIT CARD HAVING PLURAL CONTACTS ENGAGEABLE RESPECTIVELY WITH SAID FIRST SET OF PLURAL RELATIVELY FIXED CONTACTS, AND HAVING A COMMON CONDUCTOR, SELECTED CONTACTS ON SAID CARD IN CONDUCTING RELATION TO SAID COMMON CONDUCTOR, A SECOND PRINTED CIRCUIT CARD HAVING PLURAL CONTACTS ENGAGEABLE RESPECTIVELY WITH SAID SECOND SET OF PLURAL RELATIVELY FIXED CONTACTS AND HAVING A COMMON CONDUCTOR, SELECTED CONTACTS ON SAID SECOND CARD IN CONDUCTING RELATION TO ITS SAID COMMON CONDUCTOR, A POWER CONDUCTOR COMMON TO ALL OF SAID MAIN CIRCUITS ON ONE SIDE OF THE RESPECTIVE RELAYS, A POWER CONDUCTOR FOR THE COMMON CONDUCTOR OF SAID FIRST CARD TO ENERGIZE THE SELECTED MAIN CIRCUITS, AND MEANS FOR DISCONNECTING SAID LAST MENTIONED POWER CONDUCTOR FROM THE COMMON CONDUCTOR OF SAID FIRST CARD TO DEENERGIZE SAID FIRST SELECTED MAIN CIRCUITS AND FOR CONNECTING SAID LAST MENTIONED POWER CONDUCTOR TO SAID COMMON CONDUCTOR OF SAID SECOND CARD TO ENERGIZE SELECTED MAIN CIRCUITS.