Back to results
US 5,470,034 AGranted
Railway track circuits
AssigneeWestinghouse Brake & Signal Holding Ltd.
InventorMalcolm Reeves
Life of this patent
Estimating the term…
Abstract
This invention relates to railway track circuits. An active track circuit termination unit (4) is connected to the rails and, via a transmitter unit (4a), transmits signals into the rails to terminate track circuits (A,B). The transmitter unit also transmit data signals, for example track circuit signals, into the track circuits.
Claims9
A railway track circuit arrangement comprising:
- a) first and second rails of a railway track;
- b) a first track circuit comprising:
- i) a first transmitter, for transmitting signals into said rails at one end of said first track circuit;
- and
- ii) a first receiver, for receiving signals from said rails at an opposite end of said first track circuit;
- and
- c) a second track circuit adjacent said first track circuit and comprising:
- i) a second transmitter, for transmitting signals into said rails at an end of said second track circuit adjacent said opposite end of said first track circuit;
- and
- ii) a second receiver, for receiving signals from said rails at an opposite end of said second track circuit;
- wherein:
- d) said second transmitter comprises part of termination apparatus for the first and second track circuits, said termination apparatus preventing the passage of signals between said first and second track circuits as well as providing said second transmitter as an active element of said second track circuit.
9 more elements
Dependencies are inferred from the claim text.