Air traffic control system including means for generating and displaying the predicted flight path of a plurality of aircraft

Claim 1

THE COMBINATION COMPRISING: A HEADING RESOLVER HAVING A HEADING OUTPUT WHICH ROTATES AS A FUNCTION OF APPLIED GATE SIGNALS, SAID RESOLVER COMPRISING AN OSCILLATOR HAVING SINE AND COSINE VOLTAGE OUTPUTS REPRESENTING COMPONENTS OF HEADING WITH RESPECT TO AN INITIAL HEADING FROM AN INITIAL POSITION; ADJUSTABLE MEANS FOR GENERATING A PLURALITY OF DISCRETE TIME ANALOG VOLTAGES, THE MAGNITUDE OF EACH REPRESENTING THE TERMINATION IN REAL TIME OF THE MOVEMENT OF A BODY AT DETERMINED VELOCITIES ALONG ONE PARAMETER OF A PATH, SAID PATH HAVING A PLURALITY OF PARAMETERS; A FAST TIME CLOCK FOR REPETITIVELY GENERATING A SAWTOOTH VOLTAGE AT AN ACCELERATED RATE WITH RESPECT TO REAL TIME, THE INSTANTANEOUS MAGNITUDE OF SAID SAWTOOTH VOLTAGE REPRESENTING REAL TIME; MEANS FOR RESETTING SAID HEADING RESOLVER TO SAID INITIAL HEADING PRIOR TO EACH GENERATION OF SAID SAWTOOTH VOLTAGE; MEANS FOR COMPARING EACH OF SAID DISCRETE TIME ANALOG VOLTAGES WITH SAID SAWTOOTH VOLTAGE DURINGE THE GENERATION OF SAID SAWTOOTH VOLTAGE AND FOR GENERATING GATE SIGNALS UPON THE OCCURRENCE OF EACH INSTANCE OF COINCIDENCE BETWEEN SAID SAWTOOTH VOLTAGE AND EACH OF SAID DISCRETE VOLTAGES; MEANS FOR APPLYING SAID GATE SIGNALS TO SAID HEADING RESOLVER TO ROTATE SAID HEADING OUTPUT; MEANS GENERATING INSTANTANEOUS VARIABLE VELOCITY VOLTAGES REPRESENTING THE DETERMINED VELOCITIES OF SAID BODY; MEANS SUCCESSIVELY MULTIPLYING SAID SINE AND COSINE OUTPUT VOLTAGES BY SAID INSTANTANEOUS VELOCITY VOLTAGES DURING SUCCESSIVE GENERATIONS OF SAID SAWTOOTH VOLTAGES TO SUCCESSIVELY GENERATE INSTANTANEOUS VELOCITY COMPONENTS OF SAID HEADING VOLTAGE COMPONENTS FOR SAID BODY; MEANS SUCCESSIVELY INTEGRATING SAID VELOCITY COMPONENTS WITH RESPECT TO TIME AT SAID ACCELERATED RATE TO GENERATE INSTANTANEOUS POSITIONAL VOLTAGE COMPONENTS; A TWO-DIMENSIONAL DISPLAY DEVICE; AND MEANS CONNECTING SAID INSTANTANEOUS POSITIONAL VOLTAGE COMPONENTS TO SAID DISPLAY DEVICE AT SELECTED TIMES DURING THE GENERATION OF EACH SUCCESSIVE SAWTOOTH VOLTAGE.