Railway switches and signals – Train dispatching – Train telegraphy or telephony
Patent
1981-06-26
1984-05-22
Reese, Randolph
Railway switches and signals
Train dispatching
Train telegraphy or telephony
246 63R, 246187B, 246194, 336222, 340 47, B61L 2700, H04B 500
Patent
active
044496850
ABSTRACT:
The purpose of the invention is to reduce the total power consumed by a coupling for inducing a high-frequency alternating current in the rails of a railroad track for the purpose of transmitting information to trains traveling along the track.
According to the invention, the coupling consists of two conductive coils made of a conductive strip attached to an insulating strip, the conductive strip being arrayed, in the portions of the coupling that are parallel to the rail, in a plane parallel to the sides of the central rib of the rail and on either side of it, the insulating strip separating the central rib of the rail from the conductive strip. The two coils are connected in such a way that the same current flows in the same direction through both.
REFERENCES:
patent: 330605 (1885-11-01), McLaughlin
patent: 353789 (1886-12-01), Ives
patent: 847905 (1907-03-01), Chouteau
patent: 874411 (1907-12-01), Leblanc
patent: 2651713 (1953-09-01), Florencourt
patent: 3290626 (1966-12-01), Hafner
patent: 3585505 (1971-06-01), Ogilvy
patent: 3636508 (1972-01-01), Ogilvy et al.
Salmon Jean P.
Theze Claude P.
Jeumont Schneider Corporation
Reese Randolph
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