FR972618A - Perfectionnements aux appareils de détection et de repérage électriques des masses conductrices de l'électricité ou magnétiques - Google Patents

Perfectionnements aux appareils de détection et de repérage électriques des masses conductrices de l'électricité ou magnétiques

Info

Publication number
FR972618A
FR972618A FR972618DA FR972618A FR 972618 A FR972618 A FR 972618A FR 972618D A FR972618D A FR 972618DA FR 972618 A FR972618 A FR 972618A
Authority
FR
France
Prior art keywords
electrically conductive
identification devices
electrical detection
magnetic masses
masses
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
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.)
Cinema Television Ltd
Original Assignee
Cinema Television Ltd
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 Cinema Television Ltd filed Critical Cinema Television Ltd
Application granted granted Critical
Publication of FR972618A publication Critical patent/FR972618A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
    • G01V3/105—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
    • G01V3/107—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops using compensating coil or loop arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
FR972618D 1947-10-21 1948-10-01 Perfectionnements aux appareils de détection et de repérage électriques des masses conductrices de l'électricité ou magnétiques Expired FR972618A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28182/47A GB637336A (en) 1947-10-21 1947-10-21 Improvements in or relating to apparatus for detecting and/or locating by electrical means masses of electrically conducting or magnetic material

Publications (1)

Publication Number Publication Date
FR972618A true FR972618A (fr) 1951-02-01

Family

ID=10271573

Family Applications (1)

Application Number Title Priority Date Filing Date
FR972618D Expired FR972618A (fr) 1947-10-21 1948-10-01 Perfectionnements aux appareils de détection et de repérage électriques des masses conductrices de l'électricité ou magnétiques

Country Status (3)

Country Link
CH (1) CH308309A (fr)
FR (1) FR972618A (fr)
GB (1) GB637336A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4709213A (en) * 1982-07-23 1987-11-24 Garrett Electronics, Inc. Metal detector having digital signal processing
US4613815A (en) * 1983-04-27 1986-09-23 Pall Corporation Electromagnetic detector for metallic materials having an improved phase detection circuit

Also Published As

Publication number Publication date
GB637336A (en) 1950-05-17
CH308309A (fr) 1955-07-15

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