Methods and system for jointless track circuits using...

Details Methods and system for jointless track circuits using... Methods and system for jointless track circuits using...

2011-06-07

2011-06-07

Le, Mark T (Department: 3617)

Railway switches and signals

Train-position indication

Miniature model

C246S121000

Reexamination Certificate

active

07954770

ABSTRACT:
In a jointless track system, passive signaling devices (“PSDs”) are coupled to a railroad track. The PSDs are used to optimize the amplitude, modulation, coding, and frequency of waveforms that are applied to the track (by signaling points) for at least three track circuit functions: detecting trains, detecting broken rails, and communicating between the signaling points and PSDs.

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Union Switch & Signal, Service Manual 5865, “High Frequency Track Circuits: Installation and Maintenance”, Dec. 1999.
“Jointless Track Circuit Length”, by N. Nedelchev, from IEE Proc.-Electr. Power Appl., vol. 146, No. 1, Jan. 1999.
“Interference—Free Track Vacancy Detection”, by K. Huemmer, Siemens AG, Federal Republic of Germany.
“Taking care of insulated joints: track maintenance has a direct impact on the electrical performance of insulated joints, so c & s and m/w must work closely together”, by Michael House, from Railway Track and Structures, May 2005.

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