CA965864A - Fail-safe solid state highway crossing protection apparatus - Google Patents

Fail-safe solid state highway crossing protection apparatus

Info

Publication number
CA965864A
CA965864A CA193,370A CA193370A CA965864A CA 965864 A CA965864 A CA 965864A CA 193370 A CA193370 A CA 193370A CA 965864 A CA965864 A CA 965864A
Authority
CA
Canada
Prior art keywords
fail
solid state
protection apparatus
highway crossing
state highway
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
CA193,370A
Inventor
John W. Kramer
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 CA965864A publication Critical patent/CA965864A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L29/00—Safety means for rail/road crossing traffic
    • B61L29/24—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning
    • B61L29/28—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated
    • B61L29/286—Means for warning road traffic that a gate is closed or closing, or that rail traffic is approaching, e.g. for visible or audible warning electrically operated using conductor circuits controlled by the vehicle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
CA193,370A 1973-03-02 1974-02-25 Fail-safe solid state highway crossing protection apparatus Expired CA965864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00337596A US3819934A (en) 1973-03-02 1973-03-02 Fail-safe solid state highway crossing protection apparatus

Publications (1)

Publication Number Publication Date
CA965864A true CA965864A (en) 1975-04-08

Family

ID=23321184

Family Applications (1)

Application Number Title Priority Date Filing Date
CA193,370A Expired CA965864A (en) 1973-03-02 1974-02-25 Fail-safe solid state highway crossing protection apparatus

Country Status (4)

Country Link
US (1) US3819934A (en)
AU (1) AU6013973A (en)
CA (1) CA965864A (en)
IT (1) IT1004913B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995173A (en) * 1974-05-30 1976-11-30 General Signal Corporation Solid state fail-safe logic system
US7250141B2 (en) * 2004-02-27 2007-07-31 Honeywell International, Inc. Augmented catalytic heat exchanger system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3035167A (en) * 1958-12-03 1962-05-15 Westinghouse Air Brake Co Railway track circuit
US3046393A (en) * 1958-12-12 1962-07-24 Westinghouse Air Brake Co Apparatus for the control of highway crossing signals
US3004150A (en) * 1959-08-04 1961-10-10 Westinghouse Air Brake Co Highway crossing protection systems
GB1368604A (en) * 1970-10-29 1974-10-02 Westinghouse Brake & Signal Static relaying circuit

Also Published As

Publication number Publication date
AU6013973A (en) 1975-03-13
US3819934A (en) 1974-06-25
IT1004913B (en) 1976-07-20

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