GB851917A - Method for carrying out underground telephonic conversations, remote controls or telemeterings, and apparatus therefor - Google Patents

Method for carrying out underground telephonic conversations, remote controls or telemeterings, and apparatus therefor

Info

Publication number
GB851917A
GB851917A GB38202/57A GB3820257A GB851917A GB 851917 A GB851917 A GB 851917A GB 38202/57 A GB38202/57 A GB 38202/57A GB 3820257 A GB3820257 A GB 3820257A GB 851917 A GB851917 A GB 851917A
Authority
GB
United Kingdom
Prior art keywords
telemeterings
carrying
apparatus therefor
remote controls
out underground
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
GB38202/57A
Other languages
English (en)
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.)
Houilleres du Bassin du Nord et du Pas de Calais
Original Assignee
Houilleres du Bassin du Nord et du Pas de Calais
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 Houilleres du Bassin du Nord et du Pas de Calais filed Critical Houilleres du Bassin du Nord et du Pas de Calais
Publication of GB851917A publication Critical patent/GB851917A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18—Special adaptations of signalling or alarm devices
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/04—Arrangements for transmitting signals characterised by the use of a wireless electrical link using magnetically coupled devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
    • H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
GB38202/57A 1957-03-04 1957-12-09 Method for carrying out underground telephonic conversations, remote controls or telemeterings, and apparatus therefor Expired GB851917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1168800T 1957-03-04

Publications (1)

Publication Number Publication Date
GB851917A true GB851917A (en) 1960-10-19

Family

ID=9656224

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38202/57A Expired GB851917A (en) 1957-03-04 1957-12-09 Method for carrying out underground telephonic conversations, remote controls or telemeterings, and apparatus therefor

Country Status (3)

Country Link
BE (1) BE562952A (fi)
FR (1) FR1168800A (fi)
GB (1) GB851917A (fi)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138248A (en) * 1983-03-28 1984-10-17 Inst Francais Du Petrole Near field signal transmission system
EP0372461A1 (en) * 1988-12-06 1990-06-13 FABBRICHE RIUNITE MISURATORI SACOFGAS S.p.A Improved process and apparatus for transmitting measurements through a metal pipe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138248A (en) * 1983-03-28 1984-10-17 Inst Francais Du Petrole Near field signal transmission system
EP0372461A1 (en) * 1988-12-06 1990-06-13 FABBRICHE RIUNITE MISURATORI SACOFGAS S.p.A Improved process and apparatus for transmitting measurements through a metal pipe

Also Published As

Publication number Publication date
BE562952A (fi)
FR1168800A (fr) 1958-12-16

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