GB1347451A - Track supervising arrangement - Google Patents

Track supervising arrangement

Info

Publication number
GB1347451A
GB1347451A GB22972A GB22972A GB1347451A GB 1347451 A GB1347451 A GB 1347451A GB 22972 A GB22972 A GB 22972A GB 22972 A GB22972 A GB 22972A GB 1347451 A GB1347451 A GB 1347451A
Authority
GB
United Kingdom
Prior art keywords
frequency
voltage
track
filter
section
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
GB22972A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1347451A publication Critical patent/GB1347451A/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
    • B61L1/187—Use of alternating current

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

1347451 Track circuit INTERNATIONAL STANDARD ELECTRIC CORP 4 Jan 1972 [5 Jan 1971] 229/72 Heading B7N Track section GL having a ballast resistance RB is fed from source M with a voltage UM developed in inverter W under the frequency control of unit St which generates a control voltage Ust having a frequency which is a non- integral ratio to the frequency of the traction voltage Uv and the section is connected to a receiver E including an active filter which is synchronized to the frequency of the voltage UM, by a clock signal ft from unit ST. Thus the frequency of the track voltage UM and the frequency to which the filter is tuned change to compensate any change in the frequency of the traction voltage. In the receiver the output from the filter is rectified and compared with a D.C. voltage derived from signal UR from the inverter which is arranged to have an amplitude below the rectified filter output when the track section is unoccupied and above it when the section is shunted by a train axle RA.
GB22972A 1971-01-05 1972-01-04 Track supervising arrangement Expired GB1347451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT3571A AT311413B (en) 1971-01-05 1971-01-05 Track monitoring device for railway systems

Publications (1)

Publication Number Publication Date
GB1347451A true GB1347451A (en) 1974-02-27

Family

ID=3479797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22972A Expired GB1347451A (en) 1971-01-05 1972-01-04 Track supervising arrangement

Country Status (7)

Country Link
AT (1) AT311413B (en)
CH (1) CH535673A (en)
DE (1) DE2162989C2 (en)
ES (1) ES398634A1 (en)
FR (1) FR2121265A5 (en)
GB (1) GB1347451A (en)
NO (1) NO132825C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2445397C2 (en) * 1974-09-23 1982-09-23 Siemens AG, 1000 Berlin und 8000 München Track circuit, especially for direct current railways with chopper-controlled locomotives
DE3115863C2 (en) * 1981-04-21 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Track circuit for railway safety systems
DE3708788A1 (en) * 1987-03-18 1988-09-29 Standard Elektrik Lorenz Ag FREQUENCY MODULATED TRACK CIRCUIT

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE728228C (en) * 1940-08-09 1942-11-23 Julius Pintsch Kom Ges Track vacancy detection device, especially for AC-powered railways
DE875956C (en) * 1941-11-08 1953-05-07 Siemens Ag Track circuit for the independent route and station block
DE942693C (en) * 1950-02-26 1956-05-03 Lorenz C Ag Circuit arrangement for evaluating an alternating voltage according to size, frequency and phase against a comparison voltage, in particular a track voltage for track vacancy detection in railway safety systems
DE1060899B (en) * 1954-11-12 1959-07-09 Werk Signal Sicherungstech Veb Circuit arrangement for railway security systems
BE712165A (en) * 1968-03-14 1968-09-16 Acec LARGE LENGTH INSULATED JOINT TRACK CIRCUIT.

Also Published As

Publication number Publication date
FR2121265A5 (en) 1972-08-18
ES398634A1 (en) 1974-08-16
NO132825C (en) 1976-01-14
AT311413B (en) 1973-11-12
CH535673A (en) 1973-04-15
DE2162989C2 (en) 1984-05-30
NO132825B (en) 1975-10-06
DE2162989A1 (en) 1972-07-20

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee