Machine tool control system

Claim 1

IN AN AUTOMATIC CONTROL SYSTEM FOR A MACHINE TOOL HAVING A PLURALITY OF MOVABLE MEMBERS, A SOURCE OF REFERENCE VOLTAGE COMPRISING ENERGIZED POSITION CONTROL TRANSFORMERS, A PAIR OF SELECTIVELY ACTUATABLE CROSSBAR SWITCHES RESPECTIVELY COMPRISING STORAGE REGISTERS ADAPTED TO BE INDIVIDUALLY PRESET FOR STORING DIGITIZED INPUT CONTROL INFORMATION IN THE FORM OF PREDETERMINED REFERENCE COMMAND VOLTAGES FROM SAID SOURCE OF REFERENCE VOLTAGE, A SOURCE OF DIGITIZED INPUT DATA COMPRISING SERIAL INPUT INFORMATION FOR DIRECTING A PREDETERMINED SEQUENCE OF POSITIONALLY CONTROLLED MACHINE MOVEMENTS, A READER CONNECTED TO BE ACTUATED BY SAID DIGITIZED INPUT DATA, CONTROL MEANS OPERATIVE TO CONNECT ONE OF SAID CROSSBAR SWITCHES TO BE ACTUATED BY SAID READER FOR STORING PREDETERMINED REFERENCE CONTROL VOLTAGES FROM SAID SOURCE AND TO DISCONNECT THE OTHER OF SAID CROSSBAR SWITCHES FROM SAID READER, SAID CONTROL MEANS BEING SIMULTANEOUSLY OPERATIVE TO CONNECT WHICHEVER CROSSBAR SWITCH IS DISCONNECTED FROM SAID READER TO TRANSMIT OUTPUT COMMAND VOLTAGE SIGNALS PREVIOUSLY STORED THEREIN, A PLURALITY OF MOTION TRANSLATORS CONNECTED TO BE ACTIVATED BY COMMAND VOLTAGE SIGNALS TRANSMITTED FROM WHICHEVER OF SAID CROSSBAR SWITCHES THAT IS DISCONNECTED FROM SAID READER, AND MEANS FOR ACTUATING SAID CONTROL MEANS TO INTERCHANGE THE OPERATION OF SAID CROSSBAR SWITCHES WHEREBY EACH OF SAID CROSSBAR SWITCHES IS ALTERNATELY CONNECTED TO STORE COMMAND VOLTAGE SIGNALS AND TO TRANSMIT OUTPUT COMMAND VOLTAGE SIGNALS PREVIOUSLY AND RESPECTIVELY STORED IN ONE OF SAID SWITCHES.