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System for emergency remote control of traffic signals

  • US 3,209,325 A
  • Filed: 04/03/1961
  • Issued: 09/28/1965
  • Est. Priority Date: 04/03/1961
  • Status: Expired due to Term
First Claim
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11. IN A SYSTEM FOR REMOTELY CONTROLLING A TRAFFIC SIGNAL HAVING A PLURALITY OF ASPECTS;

  • THE COMBINATION WITH SAID TRAFFIC SIGNAL OF A FIXED RADIO CONTROL STATION COMPRISING;

    FIRST AND SECOND CHANNELS, MEANS FOR RESPECTIVELY RECEIVING IN SAID FIRST AND SECOND CHANNELS FIRST AND SECOND RADIO SIGNALS RESPECTIVELY HAVING DIFFERENT TRANSMISSION CHARACTERISTICS;

    SAID RECEIVING MEANS INCLUDING FIRST MEANS COUPLED TO SAID TRAFFIC SIGNAL FOR PROVIDING A PREDETERMINED ASPECT THEREON RESPONSIVE TO THE FIRST RADIO SIGNAL AND SECOND MEANS INDEPENDENTLY COUPLED TO SAID TRAFFIC SIGNAL FOR PROVIDING A PREDETERMINED ASPECT THEREON RESPONSIVE TO THE SECOND RADIO SIGNAL;

    EACH OF SAID COUPLING MEANS HAVING MEANS PROVIDING A PREDETERMINED TIME DELAY FOLLOWING TERMINATION OF THE RESPECTIVE RADIO SIGNAL, ONE TIME DELAY BEING LONGER THAN THE OTHER;

    MEANS FOR TRANSMITTING A THIRD SIGNAL FROM SAID STATION;

    AND

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