CA992190A - Fail-safe logic circuitry for vehicle transportation control - Google Patents

Fail-safe logic circuitry for vehicle transportation control

Info

Publication number
CA992190A
CA992190A CA171,813A CA171813A CA992190A CA 992190 A CA992190 A CA 992190A CA 171813 A CA171813 A CA 171813A CA 992190 A CA992190 A CA 992190A
Authority
CA
Canada
Prior art keywords
fail
logic circuitry
vehicle transportation
transportation control
safe logic
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
CA171,813A
Other languages
English (en)
Other versions
CA171813S (en
Inventor
Henry C. Sibley
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 Technologies Inc
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 CA992190A publication Critical patent/CA992190A/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
    • B61L29/288—Wiring diagram of the signal control circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
CA171,813A 1972-08-21 1973-05-18 Fail-safe logic circuitry for vehicle transportation control Expired CA992190A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28221172A 1972-08-21 1972-08-21

Publications (1)

Publication Number Publication Date
CA992190A true CA992190A (en) 1976-06-29

Family

ID=23080524

Family Applications (1)

Application Number Title Priority Date Filing Date
CA171,813A Expired CA992190A (en) 1972-08-21 1973-05-18 Fail-safe logic circuitry for vehicle transportation control

Country Status (8)

Country Link
JP (1) JPS4958510A (cs)
AR (1) AR200277A1 (cs)
CA (1) CA992190A (cs)
ES (1) ES418087A1 (cs)
FR (1) FR2196932B1 (cs)
GB (1) GB1447511A (cs)
NL (1) NL7311444A (cs)
ZA (1) ZA735596B (cs)

Also Published As

Publication number Publication date
FR2196932B1 (cs) 1976-06-18
ZA735596B (en) 1975-04-30
AU5941173A (en) 1975-02-20
JPS4958510A (cs) 1974-06-06
ES418087A1 (es) 1976-03-16
AR200277A1 (es) 1974-10-31
NL7311444A (cs) 1974-02-25
FR2196932A1 (cs) 1974-03-22
GB1447511A (en) 1976-08-25

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