CA938369A - Combined high and low frequencies for track circuit - Google Patents

Combined high and low frequencies for track circuit

Info

Publication number
CA938369A
CA938369A CA109375A CA109375A CA938369A CA 938369 A CA938369 A CA 938369A CA 109375 A CA109375 A CA 109375A CA 109375 A CA109375 A CA 109375A CA 938369 A CA938369 A CA 938369A
Authority
CA
Canada
Prior art keywords
low frequencies
track circuit
combined high
combined
track
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
CA109375A
Inventor
C. Sibley Henry
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.)
SPX Corp
Original Assignee
General 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 General Signal Corp filed Critical General Signal Corp
Application granted granted Critical
Publication of CA938369A publication Critical patent/CA938369A/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)
CA109375A 1970-05-04 1971-04-01 Combined high and low frequencies for track circuit Expired CA938369A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3423670A 1970-05-04 1970-05-04

Publications (1)

Publication Number Publication Date
CA938369A true CA938369A (en) 1973-12-11

Family

ID=21875135

Family Applications (1)

Application Number Title Priority Date Filing Date
CA109375A Expired CA938369A (en) 1970-05-04 1971-04-01 Combined high and low frequencies for track circuit

Country Status (7)

Country Link
US (1) US3670161A (en)
BR (1) BR7102691D0 (en)
CA (1) CA938369A (en)
DE (1) DE2121972A1 (en)
FR (1) FR2091200A5 (en)
GB (1) GB1336670A (en)
NL (1) NL7106099A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3819933A (en) * 1972-12-08 1974-06-25 Westinghouse Air Brake Co Detector track circuit for railroad crossings
US4304377A (en) * 1977-06-08 1981-12-08 Compagnie De Signaux Et D'entreprises Electriques Electrical block separating joints for railway signaling systems
CS217737B1 (en) * 1980-04-04 1983-01-28 Oldrich Poupe Connection of the railway circuit with plural signalling sources

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2193102A (en) * 1938-03-19 1940-03-12 Rca Corp Dictograph

Also Published As

Publication number Publication date
FR2091200A5 (en) 1972-01-14
GB1336670A (en) 1973-11-07
BR7102691D0 (en) 1973-04-10
DE2121972A1 (en) 1971-11-25
NL7106099A (en) 1971-11-08
US3670161A (en) 1972-06-13

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