×

Multi-channel AC conflict monitor

  • US 3,902,156 A
  • Filed: 10/07/1974
  • Issued: 08/26/1975
  • Est. Priority Date: 10/07/1974
  • Status: Expired due to Term
First Claim
Patent Images

1. In a traffic control system for controlling traffic movemenT over a plurality of traffic flow paths at least certain of which conflict with one another and having a traffic signal providing right-of-way and stop indications to each traffic flow path and a controller actuating said traffic signal;

  • a conflict monitor, comprising;

    a plurality of detector circuits, each detector circuit being associated with a different one of said traffic flow paths and producing an output signal during the time interval in which said traffic signal displays a right-of-way indication to said traffic flow path;

    a plurality of first logic elements, each first logic element being connected to two of said detector circuits to receive the output signals therefrom, the detector circuits connected to any one of said first logic elements being associated with conflicting traffic flow paths, each first logic element producing an output signal whenever both detector circuits connected thereto produce output signals;

    a logic network connected to all of said detector circuits to receive the output signals therefrom, said network producing an output signal whenever an output signal is received from at least one detector circuit of a first group of detector circuits and an output signal is received from at least one detector circuit of a second group of detector circuits, each detector circuit of the first group being associated with a traffic flow path which conflicts with each traffic flow path with which the detectors of the second group are associated; and

    circuit means for interrupting normal operation of said traffic signal, said circuit means being responsive to the output signals of each of said first logic elements and of said logic network.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×