Railway switches and signals – Block-signal systems – Automatic
Patent
1980-12-08
1983-02-15
Robinson, Thomas A.
Railway switches and signals
Block-signal systems
Automatic
B61L 1206
Patent
active
043736912
ABSTRACT:
A decoupling arrangement for non-insulated track circuits is disclosed wherein the receiving circuit of the evaluating unit for the AC track currents is electrically separated from the traction-current-carrying parts of the track. The cross bonds between the two rails of a track may be shorting bonds or so-called S bonds. The arrangement according to the invention improves the tuning behavior of the track circuit receivers considerably.
REFERENCES:
patent: Re27472 (1972-09-01), Thorne-Booth
patent: 4304377 (1981-12-01), Pitard
Dewald: "Tonfrequenz-Gleisstromkreise", Signal and Draht 71, (1979), 5, pp. 94-100.
Fricke Hans
Kiess Jurgen
Schulmeyer Lutz
Hill Alfred C.
International Standard Electric Corporation
O'Halloran John T.
Robinson Thomas A.
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