CA946519A - Communications systems - Google Patents

Communications systems

Info

Publication number
CA946519A
CA946519A CA125,869A CA125869A CA946519A CA 946519 A CA946519 A CA 946519A CA 125869 A CA125869 A CA 125869A CA 946519 A CA946519 A CA 946519A
Authority
CA
Canada
Prior art keywords
communications systems
communications
systems
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
CA125,869A
Other versions
CA125869S (en
Inventor
Michael S. Birkin
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.)
British Railways Board
Original Assignee
British Railways Board
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 British Railways Board filed Critical British Railways Board
Application granted granted Critical
Publication of CA946519A publication Critical patent/CA946519A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/16—Continuous control along the route
    • B61L3/22—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
    • B61L3/225—Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation using separate conductors along the route

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
CA125,869A 1970-10-23 1971-10-22 Communications systems Expired CA946519A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5052170 1970-10-23

Publications (1)

Publication Number Publication Date
CA946519A true CA946519A (en) 1974-04-30

Family

ID=10456206

Family Applications (1)

Application Number Title Priority Date Filing Date
CA125,869A Expired CA946519A (en) 1970-10-23 1971-10-22 Communications systems

Country Status (2)

Country Link
CA (1) CA946519A (en)
GB (1) GB1311540A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980956A (en) * 1975-08-25 1976-09-14 Rca Corporation Counter type remote control receiver including noise immunity system

Also Published As

Publication number Publication date
GB1311540A (en) 1973-03-28

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