TRACK CIRCUIT WITH COMBINATION FREQUENCY LOOP COUPLING

TRACK CIRCUIT WITH COMBINATION FREQUENCY LOOP COUPLING

An audio frequency (AF) track circuit whereby a railway track tuned loop transmitter operating in a dual resonant mode, for handling, two signal frequencies, can be coupled to the rails. Each frequency is conducted through a tuning unit having series and parallel branches tuned to each frequency. Th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FRANK A RASO, BARRY L SMITH, KLAUS H FRIELINGHAUS, JAMES R HOELSCHER
Format: Patent
Sprache:eng
Schlagworte:
ENSURING THE SAFETY OF RAILWAY TRAFFIC
GUIDING RAILWAY TRAFFIC
PERFORMING OPERATIONS
RAILWAYS
TRANSPORTING
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Beschreibung
Zusammenfassung:An audio frequency (AF) track circuit whereby a railway track tuned loop transmitter operating in a dual resonant mode, for handling, two signal frequencies, can be coupled to the rails. Each frequency is conducted through a tuning unit having series and parallel branches tuned to each frequency. The track circuit using the tuned loop transmitter eliminates DC return current imbalance effects while maintaining suitably high track circuit shunting sensitivity.