Railway switches and signals – Block-signal systems – Automatic
Patent
1992-02-25
1993-06-15
Huppert, Michael S.
Railway switches and signals
Block-signal systems
Automatic
246 34B, B61L 118, B61L 2316
Patent
active
052194264
ABSTRACT:
The invention provides a single-element coded alternating current railway track circuit which may be adapted to a double-element Phase-Selective configuration. A transmitter, via a transmitter transformer, provides a coded track signal to the track. A receiver transformer having one primary winding and a pair of secondary windings receives the track signal. One of the secondary windings is connected directly across a rectifier.The other secondary winding is connected in series with a secondary winding of a local transformer. This serial combination is electrically connected across another rectifier. A DC code-following relay is electrically connected across a rectified output of the first rectifier via two output terminals. A third output terminal allows substitution of a magnetic stick relay for the code-following relay if a double-element configuration is desired. The primary winding of the local transformer has terminals for connecting an AC source when using the optional double-element configuration.
REFERENCES:
patent: 2360948 (1944-10-01), Jerome
patent: 2884516 (1959-01-01), Staples
patent: 3046454 (1962-07-01), Staples
patent: 3246141 (1961-12-01), Ehrlich
patent: 3428868 (1969-02-01), Duckitt et al.
patent: 3781540 (1973-12-01), Staples
patent: 3927851 (1975-12-01), Wilcox
patent: 3986691 (1976-10-01), Ehrlich et al.
patent: 4181278 (1980-01-01), Pascoe
patent: 4188002 (1980-02-01), Gilcher
patent: 4298179 (1981-11-01), Gilcher
patent: 4314306 (1982-02-01), Darrow
patent: 4392626 (1983-07-01), Pascoe
B. Mishelevich, "Coded Track Circuits and Cab Signaling", The Signalmans Journal, May-Sep. 1950, pp. 10-12.
Huppert Michael S.
Lowe Scott L.
Union Switch & Signal Inc.
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