Railway track circuit

Details Railway track circuit Railway track circuit

1981-09-15

1984-08-21

Gruber, Felix D.

Boots, shoes, and leggings

246 40, 246122R, B61L 320, B61L 1102, B61L 2106

Patent

active

044674309

ABSTRACT:
A railway track comprising a pair of rails is divided into a succession of segments, each segment having a railway track circuit for separating successive trains. The track circuit is switchable between an initial state and a complementary state and comprises a downstream impedance electrically connecting the rails at a downstream point, an upstream impedance electrically connecting the rails at an upstream point, an electromagnetic sensor located between the upstream and downstream impedances in the vicinity of one of the rails, a transmitting member, and a pair of receiving members. One receiving member is in electromagnetic communication with the electromagnetic sensor. The transmitting member and the other receiving member are switchable between connection to the downstream impedance and the upstream impedance.

REFERENCES:
patent: 3610920 (1971-10-01), Frielinghaus
patent: 3663809 (1972-05-01), Sibley
patent: 3888437 (1975-06-01), Birkin
patent: 3902689 (1975-09-01), Hermann et al.
patent: 3951364 (1976-04-01), Sibley
patent: 4022408 (1977-05-01), Staples
patent: 4046342 (1977-09-01), Buzzard
patent: 4151969 (1979-05-01), Wood
patent: 4166599 (1979-09-01), Auer, Jr. et al.
patent: 4387870 (1983-06-01), Matty et al.
patent: 4392625 (1983-07-01), Poupe

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