Radio location system with lane identification facilities

Claim 1

A TRANSMITTING SYSTEM OF THE HYPERBOLIC, CONTINUOUS WAVE TYPE COMPRISING FIRST, SECOND AND THIRD SPACED APART TRANSMITTING STATIONS, FIRST, SECOND AND THIRD TRANSMITTERS AT SAID FIRST STATION, MEANS FOR RENDERING SAID FIRST SECOND AND THIRD TRANSMITTERS EFFECTIVE IN SEQUENCE TO RESPECTIVELY RADIATE FIRST, SECOND AND THIRD SIGNALS DURING DIFFERENT INTERVALS, SAID FIRST TRANSMITTER BEING EFFECTIVE DURING A FIRST INTERVAL, SAID SECOND TRANSMITTER BEING EFFECTIVE DURING A SECOND INTERVAL AND SAID THIRD TRANSMITTER BEING EFFECTIVE DURING THIRD AND FOURTH INTERVALS, FOURTH AND FIFTH TRANSMITTERS AT SAID SECOND STATION FOR RESPECTIVELY RADIATING FOURTH AND FIFTH SIGNALS, CONTROL MEANS AT SAID SECOND STATION FOR RENDERING SAID FOURTH TRANSMITTER EFFECTIVE DURING SAID THIRD INTERVAL AND FOR RENDERING SAID FIFTH TRANSMITTER EFFECTIVE DURING SAID FIRST, SECOND AND FOURTH INTERVALS, SIXTH AND SEVENTH TRANSMITTERS AT SAID THIRD STATION FOR RESPECTIVELY RADIATING SIXTH AND SEVENTH SIGNALS, CONTROL MEANS AT SAID THIRD STATION FOR RENDERING SAID SIXTH TRANSMITTER EFFECTIVE DURING SAID FOURTH INTERVAL AND FOR RENDERING SAID SEVENTH TRANSMITTER EFFECTIVE DURING SAID FIRST, SECOND AND THIRD INTERVALS, FIRST RECEIVING MEANS IN SAID SYSTEM FOR RECEIVING AND HETERODYNING THE SECOND AND SEVENTH SIGNALS TO DEVELOP A FIRST BEAT SIGNAL DURING SAID SECOND INTERVAL AND FOR RADIATING A FIRST REFERENCE SIGNAL DERIVED FROM SAID FIRST BEAT SIGNAL, SECOND RECEIVING MEANS IN SAID SYSTEM FOR RECEIVING AND HETERO-