CA965863A - Fail-safe railroad-highway grade crossing protection system - Google Patents

Fail-safe railroad-highway grade crossing protection system

Info

Publication number
CA965863A
CA965863A CA178,347A CA178347A CA965863A CA 965863 A CA965863 A CA 965863A CA 178347 A CA178347 A CA 178347A CA 965863 A CA965863 A CA 965863A
Authority
CA
Canada
Prior art keywords
fail
protection system
grade crossing
crossing protection
highway grade
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
CA178,347A
Other versions
CA178347S (en
Inventor
John O.G. Darrow
Thomas C. Vaughn
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 CA965863A publication Critical patent/CA965863A/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)
CA178,347A 1972-09-07 1973-08-08 Fail-safe railroad-highway grade crossing protection system Expired CA965863A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28687272A 1972-09-07 1972-09-07

Publications (1)

Publication Number Publication Date
CA965863A true CA965863A (en) 1975-04-08

Family

ID=23100535

Family Applications (1)

Application Number Title Priority Date Filing Date
CA178,347A Expired CA965863A (en) 1972-09-07 1973-08-08 Fail-safe railroad-highway grade crossing protection system

Country Status (4)

Country Link
US (1) US3781541A (en)
AU (1) AU476361B2 (en)
CA (1) CA965863A (en)
IT (1) IT996636B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4172576A (en) * 1977-06-21 1979-10-30 General Signal Corporation Highway crossing system with motion detecting apparatus
US4365777A (en) * 1979-08-17 1982-12-28 Modern Industries Signal Equipment, Inc. Train approach detector
GB8320509D0 (en) * 1983-07-29 1983-09-01 Westinghouse Brake & Signal Proving safe operation
US4893119A (en) * 1987-09-08 1990-01-09 Nasatka Barrier, Inc. Method and apparatus for operating a vehicle barricade
US5092544A (en) * 1989-12-22 1992-03-03 General Railway Signal Corp. Highway crossing control system for railroads utilizing a communications link between the train locomotive and the crossing protection equipment
US5098044A (en) * 1989-12-22 1992-03-24 General Railway Signal Corporation Highway crossing control system for railroads utilizing a communications link between the train locomotive and the crossing protection equipment
US5022613A (en) * 1990-04-26 1991-06-11 Safetran Systems Corporation AC and battery backup supply for a railroad crossing gate
US5459663A (en) * 1993-12-10 1995-10-17 Union Switch & Signal Inc. Cab signal apparatus and method
US7075427B1 (en) * 1996-01-12 2006-07-11 Eva Signal Corporation Traffic warning system
US6381506B1 (en) 1996-11-27 2002-04-30 Victor Grappone Fail-safe microprocessor-based control and monitoring of electrical devices

Also Published As

Publication number Publication date
IT996636B (en) 1975-12-10
US3781541A (en) 1973-12-25
AU476361B2 (en) 1976-09-16
AU5573773A (en) 1974-11-21

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