GB1451431A - Railway signalling apparatus and systems - Google Patents

Railway signalling apparatus and systems

Info

Publication number
GB1451431A
GB1451431A GB4793872A GB4793872A GB1451431A GB 1451431 A GB1451431 A GB 1451431A GB 4793872 A GB4793872 A GB 4793872A GB 4793872 A GB4793872 A GB 4793872A GB 1451431 A GB1451431 A GB 1451431A
Authority
GB
United Kingdom
Prior art keywords
circuit
track
track circuit
overlay
transmitter
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
GB4793872A
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.)
GEG GENERAL SIGNAL Ltd
Original Assignee
GEG GENERAL SIGNAL 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 GEG GENERAL SIGNAL Ltd filed Critical GEG GENERAL SIGNAL Ltd
Priority to GB4793872A priority Critical patent/GB1451431A/en
Priority to ZA737861A priority patent/ZA737861B/en
Priority to NL7314277A priority patent/NL7314277A/xx
Priority to ES419765A priority patent/ES419765A1/en
Priority to AU61851/73A priority patent/AU476241B2/en
Publication of GB1451431A publication Critical patent/GB1451431A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/08—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only
    • B61L23/14—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only automatically operated
    • B61L23/16—Track circuits specially adapted for section blocking
    • B61L23/168—Track circuits specially adapted for section blocking using coded current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/16—Continuous control along the route
    • B61L3/22—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
    • B61L3/24—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation employing different frequencies or coded pulse groups, e.g. in combination with track circuits
    • B61L3/246—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation employing different frequencies or coded pulse groups, e.g. in combination with track circuits using coded current

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

1451431 Continuous rail track circuit GEC-GENERAL SIGNAL Ltd 16 Oct 1973 [18 Oct 1972] 47938/72 Heading B7N In a continuous rail track circuit with ends defined by shorting links 14, 16, in which a low frequency transmitter 22 supplies a signal, e.g. of 375 hertz, to the centre of the circuit which in the absence of a train is picked up by receive coils 26, 46 disposed near the ends of the circuit and connected to receivers 24, 44 and in which higher frequency overlay track circuits having transmitters 30, 48 supplying a carrier signal modulated by a track circuit tone are used to define clearly the ends of the circuit, the overlay track circuit transmitter 30 at the leaving end of the track circuit is also modulated with cab signalling tones 40, indicating the condition of an adjacent track side signal 28 and possibly speed and other restrictions. In each overlay transmitter, e.g. 30 a carrier source 34 feeds a modulator 36 in which the carrier, e.g. of 25 K hertz is modulated by the track circuit tone which can be the frequency of the transmitter 22, the modulator associated with the leaving end circuit is also fed from the cab signalling source 40. Each of the track circuit receivers 24, 32, 44, 56 controls a relay 58, 60, 62, 64 having a contact in the signal control circuit of the preceding track section. The connection of the overlay transmitters to the track is adjacent the receive pick up coils, e.g. 26 of the main track circuit. The cab signals are picked up by pick up coil 82 on the train in the approach to the connection point and on the train the signals are demodulated 84, decoded 86 and applied to a drivers display 88 which is self latching to retain the display until the next signalling location is reached.
GB4793872A 1972-10-18 1972-10-18 Railway signalling apparatus and systems Expired GB1451431A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB4793872A GB1451431A (en) 1972-10-18 1972-10-18 Railway signalling apparatus and systems
ZA737861A ZA737861B (en) 1972-10-18 1973-10-09 Improvements in or relating to railway signalling apparatus and systems
NL7314277A NL7314277A (en) 1972-10-18 1973-10-17
ES419765A ES419765A1 (en) 1972-10-18 1973-10-18 Railway signalling apparatus and systems
AU61851/73A AU476241B2 (en) 1972-10-18 1973-10-25 Improvements in or relating to railway signalling apparatus and systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4793872A GB1451431A (en) 1972-10-18 1972-10-18 Railway signalling apparatus and systems

Publications (1)

Publication Number Publication Date
GB1451431A true GB1451431A (en) 1976-10-06

Family

ID=10446791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4793872A Expired GB1451431A (en) 1972-10-18 1972-10-18 Railway signalling apparatus and systems

Country Status (5)

Country Link
AU (1) AU476241B2 (en)
ES (1) ES419765A1 (en)
GB (1) GB1451431A (en)
NL (1) NL7314277A (en)
ZA (1) ZA737861B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0007271A1 (en) * 1978-07-17 1980-01-23 JEUMONT-SCHNEIDER Société anonyme dite: Device for transmitting information by the rails between a railway track and the vehicles running on this track
EP0036823A1 (en) * 1980-03-25 1981-09-30 JEUMONT-SCHNEIDER Société anonyme dite: Device for information transmission by means of the rails between a railway-track and a train of vehicles moving on this track
FR2479763A1 (en) * 1980-04-04 1981-10-09 Vysoka Skola Dopravy Spojov TRACK CIRCUIT HAVING MULTIPLE SIGNAL SOURCES
GB2208449A (en) * 1987-08-05 1989-03-30 M L Engineering Track indicator apparatus
NL1026709C2 (en) * 2004-07-23 2006-01-24 Holland Railconsult B V System and method for transmitting signals to a moving rail vehicle.
EP1669271A1 (en) * 2004-12-08 2006-06-14 Nedtrain Consulting B.V. Speed monitoring system for trains

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0007271A1 (en) * 1978-07-17 1980-01-23 JEUMONT-SCHNEIDER Société anonyme dite: Device for transmitting information by the rails between a railway track and the vehicles running on this track
WO1980000239A1 (en) * 1978-07-17 1980-02-07 Jeumont Schneider Device for better transmission through the rail between a railway track and a group of vehicles running on this track
FR2431409A1 (en) * 1978-07-17 1980-02-15 Jeumont Schneider DEVICE FOR TRANSMITTING INFORMATION BY RAILS BETWEEN A RAILWAY TRACK AND A SET OF VEHICLES TRAFFICING THEREON
EP0036823A1 (en) * 1980-03-25 1981-09-30 JEUMONT-SCHNEIDER Société anonyme dite: Device for information transmission by means of the rails between a railway-track and a train of vehicles moving on this track
WO1981002715A1 (en) * 1980-03-25 1981-10-01 Jeumont Schneider Information transmission device through the rails between a railway track and a vehicle assembly circulating on this track
US4442988A (en) * 1980-03-25 1984-04-17 Jeumont-Schneider Corporation Information transmission device through the rails between a railway track and a vehicle assembly circulating on this track
FR2479763A1 (en) * 1980-04-04 1981-10-09 Vysoka Skola Dopravy Spojov TRACK CIRCUIT HAVING MULTIPLE SIGNAL SOURCES
GB2208449A (en) * 1987-08-05 1989-03-30 M L Engineering Track indicator apparatus
GB2208449B (en) * 1987-08-05 1992-03-18 M L Engineering Track indicator apparatus
NL1026709C2 (en) * 2004-07-23 2006-01-24 Holland Railconsult B V System and method for transmitting signals to a moving rail vehicle.
EP1669271A1 (en) * 2004-12-08 2006-06-14 Nedtrain Consulting B.V. Speed monitoring system for trains

Also Published As

Publication number Publication date
AU476241B2 (en) 1976-09-16
AU6185173A (en) 1975-05-01
ES419765A1 (en) 1976-03-01
ZA737861B (en) 1974-09-25
NL7314277A (en) 1974-04-22

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19931015