BE562952A - - Google Patents

Info

Publication number
BE562952A
BE562952A BE562952DA BE562952A BE 562952 A BE562952 A BE 562952A BE 562952D A BE562952D A BE 562952DA BE 562952 A BE562952 A BE 562952A
Authority
BE
Belgium
Application number
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.)
Publication of BE562952A publication Critical patent/BE562952A/xx

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)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
BE562952D 1957-03-04 BE562952A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE562952A true BE562952A (en)

Family

ID=9656224

Family Applications (1)

Application Number Title Priority Date Filing Date
BE562952D BE562952A (en) 1957-03-04

Country Status (3)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543766B1 (en) * 1983-03-28 1985-07-19 Inst Francais Du Petrole METHOD OF TRANSMITTING A SIGNAL WITHOUT AN ELECTRICAL LINK THROUGH A CONDUCTIVE WALL, FOR example THE SHELL OF A VESSEL, AND DEVICE FOR IMPLEMENTING SAME
IT1227525B (en) * 1988-12-06 1991-04-12 Sacofgas Spa PROCEDURE AND EQUIPMENT PERFECTED FOR THE TRANSMISSION OF MEASUREMENTS THROUGH A METAL TUBE

Also Published As

Publication number Publication date
GB851917A (en) 1960-10-19
FR1168800A (en) 1958-12-16

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