GB929017A - Improvements relating to direct current track circuits for railway signalling systems - Google Patents

Improvements relating to direct current track circuits for railway signalling systems

Info

Publication number
GB929017A
GB929017A GB2462859A GB2462859A GB929017A GB 929017 A GB929017 A GB 929017A GB 2462859 A GB2462859 A GB 2462859A GB 2462859 A GB2462859 A GB 2462859A GB 929017 A GB929017 A GB 929017A
Authority
GB
United Kingdom
Prior art keywords
pair
circuit
direct current
signalling systems
railway signalling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2462859A
Inventor
Harry Duckitt
Walter Maggs Sweetenham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB2462859A priority Critical patent/GB929017A/en
Publication of GB929017A publication Critical patent/GB929017A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/18—Railway track circuits
    • B61L1/181—Details
    • B61L1/186—Use of rectified alternating current

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

929,017. Track circuit feed sets. WESTING- HOUSE BRAKE & SIGNAL CO. Ltd. July 15, 1960 [July 17, 1959], No. 24628/59. Class 105. In a D.C. track circuit feed set 16 for use in railway signalling systems in which only one rail 12 is divided by insulated joints 13, 14 into track circuit sections, e.g. section A, whilst the other rail 11 is continuous to provide a return circuit for an A.C. traction system, the direct current is derived from an A.C. supply via a transformer 17 and full-wave rectifier 19 and the alternating traction return current is prevented from interfering with the operation of the feed set by series chokes 22, 21, which form a high impedance at the traction frequency and a low valve shunt resistor 20. The resistor 20 is provided with an outer pair of terminals and an inner pair close to, but separate from the outer pair. The rectifier circuit is connected to one pair of terminals and the output circuit to the other pair.
GB2462859A 1959-07-17 1959-07-17 Improvements relating to direct current track circuits for railway signalling systems Expired GB929017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2462859A GB929017A (en) 1959-07-17 1959-07-17 Improvements relating to direct current track circuits for railway signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2462859A GB929017A (en) 1959-07-17 1959-07-17 Improvements relating to direct current track circuits for railway signalling systems

Publications (1)

Publication Number Publication Date
GB929017A true GB929017A (en) 1963-06-19

Family

ID=10214698

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2462859A Expired GB929017A (en) 1959-07-17 1959-07-17 Improvements relating to direct current track circuits for railway signalling systems

Country Status (1)

Country Link
GB (1) GB929017A (en)

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