| 摘要 |
<p>JOINTLESS WHICH FREQUENCY TRACK CIRCUIT SYSTEMS FOR RAILROADS A jointless high frequency track circuit system is provided, for communication of signals through track rails of a stretch of railway track, having a high frequency track circuit transmitter and receiver and a cab signal transmitter coupled across track rails at each of several locations marking the ends of track sections along a stretch of railway track. Each location has an impedance bond having a primary winding connected across the track rails and having toroid secondary windings tuned to assigned distinctive high frequencies for coupling a track transmitter and a track receiver to the track rails. A loop circuit is also provided at each location, including a tuned loop, for inductively coupling a cab signal code transmitter to the track rails independent of the impedance bond. The tuned toroid coils and the loop circuit are connected in series to one end of a two wire line circuit, which, at its other end, is connected to a track circuit high frequency transmitter, a track circuit receiver, and a cab signal transmitter connected in multiple.</p> |
