|4575031||Device for detecting the unbalance between the two fractions of the return traction current in the rails of a railroad track|
A device for detecting the unbalance Ɗi between the two fractions of the return traction current flowing in the two rails of a railroad track, in the presence of a signalling current in the respective track circuit, includes a linear combination circuit ...
|4145018||Protective device for railroad signaling apparatus|
The receiver of an audio frequency (AF) track circuit for a track section of an electric propulsion railroad is coupled across an associated impedance bond by the primary and secondary windings of a saturable transformer. The control winding of this trans...