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GB1276948A - A method of transmitting information along railway tracks and apparatus for use therein - Google Patents

A method of transmitting information along railway tracks and apparatus for use therein

Info

Publication number
GB1276948A
GB1276948A GB07264/70A GB1726470A GB1276948A GB 1276948 A GB1276948 A GB 1276948A GB 07264/70 A GB07264/70 A GB 07264/70A GB 1726470 A GB1726470 A GB 1726470A GB 1276948 A GB1276948 A GB 1276948A
Authority
GB
United Kingdom
Prior art keywords
relay
track circuit
train
band pass
contact
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
GB07264/70A
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.)
Compagnie de Signaux et dEntreprises Electriques SA
Original Assignee
Compagnie de Signaux et dEntreprises Electriques SA
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 Compagnie de Signaux et dEntreprises Electriques SA filed Critical Compagnie de Signaux et dEntreprises Electriques SA
Publication of GB1276948A publication Critical patent/GB1276948A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B61L3/221—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation using track circuits

Landscapes

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

Abstract

1276948 Track circuit signalling system COMPAGNIE DE SIGNAUX ET D'ENTREPRISES ELECTRIQUES 10 April 1970 [7 Jan 1970] 17264/70 Heading B7N In a track circuit signalling system for detecting track occupation and for conveying information to a train in which the track circuit signal is a carrier frequency modulated by a number of different frequency information tones, the carrier is modulated at low frequencies and the modulation signals after demodulation on the train or at the track circuit end are multiplied to facilitate separation by band pass filters. Alternate circuits operate with different carrier frequencies so that a signal is picked up on the train by either pick-up coil 2 or 3, each tuned to one of the frequencies. Assume a signal is picked up by coil 2 this is amplified at 4 and passed via band pass filter 8 to a second amplifier 10. This supplies a first output which picks up relay 12 so that the power supply V 0 to the second channel is cut off by contact 22, slow to operate relay 23 is energized via contact 20 and the amplifier output is applied via contact 21 and contact 24 of relay 23 when this picks up, to a demodulator 29. The demodulated signals are first multiplied by 2 in unit 30 and then applied to the common input of a series of multiply by 8 circuits M1-M7 which have tuned inputs. The multipliers feed band pass filters F1-F7 each of which supplies an output, when its associated tone is present to operate a signalling relay R1- R7 controlling lamps V1-V7.
GB07264/70A 1970-01-07 1970-04-10 A method of transmitting information along railway tracks and apparatus for use therein Expired GB1276948A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7000325A FR2076219A5 (en) 1970-01-07 1970-01-07

Publications (1)

Publication Number Publication Date
GB1276948A true GB1276948A (en) 1972-06-07

Family

ID=9048645

Family Applications (1)

Application Number Title Priority Date Filing Date
GB07264/70A Expired GB1276948A (en) 1970-01-07 1970-04-10 A method of transmitting information along railway tracks and apparatus for use therein

Country Status (4)

Country Link
US (1) US3743935A (en)
DE (1) DE2050938A1 (en)
FR (1) FR2076219A5 (en)
GB (1) GB1276948A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478901B1 (en) * 1980-03-18 1986-02-07 Jeumont Schneider LARGER AMPLITUDE ALTERNATIVE SIGNAL SELECTION STAGE AMONG TWO DIFFERENT FREQUENCY SIGNALS
FR2607769B1 (en) * 1986-12-08 1989-02-03 Alsthom SYSTEM FOR TWO-WAY TRANSMISSION OF INFORMATION BETWEEN A GROUND STATION AND A STATION ON A RAIL VEHICLE
JP4128914B2 (en) * 2003-07-03 2008-07-30 株式会社日立製作所 Automatic train stop system
DE102011083122A1 (en) * 2011-09-21 2013-03-21 Siemens Aktiengesellschaft Method for operating a vehicle-side receiving device of a train control system and vehicle-side receiving device
CN106945686A (en) * 2017-03-29 2017-07-14 固安北信铁路信号有限公司 A kind of new 25Hz track circuits indoor reception end equipment

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127476A (en) * 1964-03-31 david
US2133640A (en) * 1935-07-15 1938-10-18 Union Switch & Signal Co Recording mechanism for railway traffic controlling apparatus
US2117739A (en) * 1936-06-05 1938-05-17 Bell Telephone Labor Inc Signaling system
US2953644A (en) * 1956-10-04 1960-09-20 Bell Telephone Labor Inc Wave transmission system
US3378817A (en) * 1964-12-09 1968-04-16 Gen Electric Signalling systems
US3383595A (en) * 1965-06-22 1968-05-14 Obata Hiromu Information transmitting system for moving object

Also Published As

Publication number Publication date
FR2076219A5 (en) 1971-10-15
US3743935A (en) 1973-07-03
DE2050938A1 (en) 1971-07-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee