CA943660A - Railway signal system - Google Patents

Railway signal system

Info

Publication number
CA943660A
CA943660A CA121,467A CA121467A CA943660A CA 943660 A CA943660 A CA 943660A CA 121467 A CA121467 A CA 121467A CA 943660 A CA943660 A CA 943660A
Authority
CA
Canada
Prior art keywords
signal system
railway signal
railway
signal
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
CA121,467A
Other versions
CA121467S (en
Inventor
Willard L. Geiger
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.)
ERICO PRODUCTS
Original Assignee
ERICO PRODUCTS
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 ERICO PRODUCTS filed Critical ERICO PRODUCTS
Application granted granted Critical
Publication of CA943660A publication Critical patent/CA943660A/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)
CA121,467A 1970-10-23 1971-08-26 Railway signal system Expired CA943660A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8351270A 1970-10-23 1970-10-23

Publications (1)

Publication Number Publication Date
CA943660A true CA943660A (en) 1974-03-12

Family

ID=22178804

Family Applications (1)

Application Number Title Priority Date Filing Date
CA121,467A Expired CA943660A (en) 1970-10-23 1971-08-26 Railway signal system

Country Status (2)

Country Link
US (1) US3706098A (en)
CA (1) CA943660A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927852A (en) * 1972-08-21 1975-12-23 Gen Signal Corp Fail-safe logic circuitry for vehicle transportation control
US4365777A (en) * 1979-08-17 1982-12-28 Modern Industries Signal Equipment, Inc. Train approach detector
US5170970A (en) * 1990-09-21 1992-12-15 Harmon Industries, Inc. Method and apparatus for improving rail shunts
US5924652A (en) * 1997-09-29 1999-07-20 Harmon Industries, Inc. Island presence detected
CN1887628B (en) * 2006-07-24 2010-07-07 北京交通大学 Sound controlled automatic warning device and method for unattended level railway crossing
CN102647651B (en) * 2011-02-16 2016-08-31 富泰华工业（深圳）有限公司 Volume control circuit
CA2933911A1 (en) * 2015-06-26 2016-12-26 Alstom Transport Technologies System and method for controlling a wayside device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2941069A (en) * 1957-04-17 1960-06-14 Westinghouse Freins & Signaux Track circuits
US3150337A (en) * 1961-02-27 1964-09-22 Armec Corp Electro-mechanical resonant device
US3217158A (en) * 1961-11-29 1965-11-09 Westinghouse Air Brake Co Railway track circuit apparatus
US3302746A (en) * 1964-03-04 1967-02-07 Ikrath Kurt Self-excited seismic systems
CH496275A (en) * 1967-01-31 1970-04-30 Centre Electron Horloger Electromechanical oscillator for time device

Also Published As

Publication number Publication date
US3706098A (en) 1972-12-12

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