ZA761860B - Dual frequency track circuit - Google Patents

Dual frequency track circuit

Info

Publication number
ZA761860B
ZA761860B ZA761860A ZA761860A ZA761860B ZA 761860 B ZA761860 B ZA 761860B ZA 761860 A ZA761860 A ZA 761860A ZA 761860 A ZA761860 A ZA 761860A ZA 761860 B ZA761860 B ZA 761860B
Authority
ZA
South Africa
Prior art keywords
track circuit
dual frequency
frequency track
dual
circuit
Prior art date
Application number
ZA761860A
Other languages
English (en)
Inventor
J Auer
W Smith
Original Assignee
Gen Signal 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 Gen Signal Corp filed Critical Gen Signal Corp
Publication of ZA761860B publication Critical patent/ZA761860B/xx

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
    • B61L3/225—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation using separate conductors along the route
    • 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)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Automation & Control Theory (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
ZA761860A 1975-03-27 1976-03-26 Dual frequency track circuit ZA761860B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/562,725 US3970271A (en) 1975-03-27 1975-03-27 Dual frequency track circuit

Publications (1)

Publication Number Publication Date
ZA761860B true ZA761860B (en) 1977-03-30

Family

ID=24247512

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA761860A ZA761860B (en) 1975-03-27 1976-03-26 Dual frequency track circuit

Country Status (7)

Country Link
US (1) US3970271A (it)
AU (1) AU502047B2 (it)
CA (1) CA1045238A (it)
GB (1) GB1538156A (it)
IT (1) IT1067745B (it)
NL (1) NL7603180A (it)
ZA (1) ZA761860B (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2449575A1 (fr) * 1978-12-22 1980-09-19 Signaux Entr Electriques Procede de codage de securite pour circuits de voie
US4258312A (en) * 1979-04-20 1981-03-24 American Standard Inc. Vital voltage regulator and phase shift circuit arrangement
US4298179A (en) * 1979-05-31 1981-11-03 American Standard Inc. Vital cross field transformer circuit arrangement for railroad signaling systems
IT1151495B (it) * 1980-04-18 1986-12-17 Ansaldo Sa Rilevatore di squilibrio della corrente armonica di trazione nei circuiti di binario
US4723739A (en) * 1985-07-16 1988-02-09 American Standard Inc. Synchronous rectification track circuit
IT1225716B (it) * 1988-10-26 1990-11-22 Esacontrol Spa Dispositivo per la protezione dei rele' di binario dai disturbi elettrici
JP5364603B2 (ja) * 2010-01-18 2013-12-11 株式会社日立製作所 列車検知装置
US12459551B2 (en) 2019-10-14 2025-11-04 Athena Industrial Technologies Inc. Broken rail detector
EP4045378A4 (en) 2019-10-14 2024-04-24 Athena Industrial Technologies INC. BROKEN RAIL DETECTOR

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2076930A (en) * 1935-04-13 1937-04-13 Union Switch & Signal Co Railway signaling system
US3046454A (en) * 1957-11-14 1962-07-24 Westinghouse Air Brake Co Code detecting apparatus

Also Published As

Publication number Publication date
AU1243076A (en) 1977-10-06
GB1538156A (en) 1979-01-10
AU502047B2 (en) 1979-07-12
US3970271A (en) 1976-07-20
IT1067745B (it) 1985-03-16
NL7603180A (nl) 1976-09-29
CA1045238A (en) 1978-12-26

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