CA954969A - Jointless coded alternating current track circuits - Google Patents

Jointless coded alternating current track circuits

Info

Publication number
CA954969A
CA954969A CA179,999A CA179999A CA954969A CA 954969 A CA954969 A CA 954969A CA 179999 A CA179999 A CA 179999A CA 954969 A CA954969 A CA 954969A
Authority
CA
Canada
Prior art keywords
jointless
alternating current
current track
track circuits
coded alternating
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
CA179,999A
Other versions
CA179999S (en
Inventor
Crawford E. Staples
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.)
Westinghouse Air Brake Co
Original Assignee
Westinghouse Air Brake Co
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 Air Brake Co filed Critical Westinghouse Air Brake Co
Application granted granted Critical
Publication of CA954969A publication Critical patent/CA954969A/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)
CA179,999A 1972-09-18 1973-08-30 Jointless coded alternating current track circuits Expired CA954969A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28997172A 1972-09-18 1972-09-18

Publications (1)

Publication Number Publication Date
CA954969A true CA954969A (en) 1974-09-17

Family

ID=23113979

Family Applications (1)

Application Number Title Priority Date Filing Date
CA179,999A Expired CA954969A (en) 1972-09-18 1973-08-30 Jointless coded alternating current track circuits

Country Status (5)

Country Link
US (1) US3781540A (en)
AU (1) AU472381B2 (en)
CA (1) CA954969A (en)
GB (1) GB1437194A (en)
IT (1) IT996703B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986691A (en) * 1975-05-30 1976-10-19 Westinghouse Air Brake Company Phase selective track circuit apparatus
US5219426A (en) * 1992-02-25 1993-06-15 Union Switch & Signal Inc. Single-element coded alternating current railway track circuit having double-element, phase-selective capability

Also Published As

Publication number Publication date
IT996703B (en) 1975-12-10
AU5980373A (en) 1975-03-06
AU472381B2 (en) 1976-05-20
US3781540A (en) 1973-12-25
GB1437194A (en) 1976-05-26

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