Air traffic control system

Claim 1

AN AIR TRAFFIC CONTROL SYSTEM COMPRISING, IN COMBINATION, TWO REMOTELY SPACED STATIONS, A LINE CIRCUIT CONNECTING THE TWO STATIONS, A CONTROL PANEL LOCATED AT EACH STATION, SAID CONTROL PANEL HAVING DISPOSED THEREON MANUALLY OPERABLE MEANS FOR EACH OF A PLURALITY OF ALTITUDES FOR SELECTING ITS RESPECTIVE ALTITUDE, MANUALLY OPERABLE MEANS FOR DESIGNATING RESERVATION OF EACH FLIGHT ALTITUDE IN ACCORDANCE WITH THE DESIGNATED CONDITION OF ITS SAID ALTITUDE SELECTING MEANS, A PLURALITY OF MANUALLY OPERABLE MEANS FOR SELECTING ITEMS OF FLIGHT DATA, MANUALLY OPERABLE TRANSFER MEANS FOR EACH OF A PLURALITY OF ALTITUDES FOR TRANSFERRING THE ITEMS OF FLIGHT DATA FROM ONE ALTITUDE TO ANOTHER ALTITUDE, AND A PLURALITY OF CHANGEABLE DISPLAY INDICATORS FOR EACH ALTITUDE, THE FIRST OF SAID INDICATORS FOR EACH ALTITUDE BEING PROVIDED FOR DISPLAYING A SYMBOL REPRESENTATIVE OF A RESERVATION INDICATION AND THE REMAINING INDICATORS FOR EACH ALTITUDE BEING PROVIDED FOR DISPLAYING THE ITEMS OF FLIGHT DATA, NORMALLY AT-REST CODE COMMUNICATION APPARATUS AT EACH STATION EFFECTIVE TO TRANSMIT IN RESPONSE TO SELECTION OF AN ALTITUDE AND TO DESIGNATION OF A RESERVATION AT ONE STATION A STEP BY STEP CONTROL CODE CHARACTERISTIC OF THAT SELECTED ALTITUDE AND RESERVATION OVER THE LINE CIRCUIT FROM THAT STATION FOR EFFECTING THE OPERATION OF THE CORRESPONDING INDICATOR FOR THAT ALTITUDE AT THE OTHER STATION TO DISPLAY THE DESIRED RESERVATION INDICATION WHEN THE TRANSMISSION OF SUCH CODE IS COMPLETED, THE EFFECTIVE OPERATION OF SUCH INDICATOR BEING EFFECTIVE TO CAUSE THE NORMALLY AT-REST CODE COMMUNICATION APPARATUS AT SAID OTHER STATION TO TRANSMIT A SIMILAR CODE FOR EFFECTING THE OPERATION OF THE CORRESPONDING ALTITUDE INDICATOR AT SAID ONE STATION TO DISPLAYING A SIMILAR RESERVATION INDICATION, A PLURALITY OF MEANS INCLUDED WITH THE CODE COMMUNICATION APPARATUS AT EACH STATION FOR EFFECTING SEQUENTIAL OPERATIVE CONTROL OF THE INDICATORS FOR THE ALTITUDE SELECTED IN RESPONSE TO THE SELECTION OF FLIGHT DATA FOR DISPLAYING ITEMS OF FLIGHT DATA THEREIN, SAID TRANSFER MEANS WHEN DESIGNATED BEING EFFECTIVE FOR ITS ASSIGNED ALTITUDE IN ACCORDANCE WITH THE DESIGNATION OF SAID ALTITUDE SELECTING MEANS FOR ANOTHER ALTITUDE AND SAID ALTITUDE RESERVATION MEANS AT ONE STATION TO CONDITION THE RESPECTIVE CODE COMMUNICATION APPARATUS FOR CAUSING TRANSFER OF FLIGHT DATA FROM THE DISPLAY INDICATORS CORRESPONDING TO SAID ALTITUDE SELECTING MEANS TO THE DISPLAY INDICATORS CORRESPONDING TO SAID TRANSFER MEANS.