FR550234A - Improvements to terrestrial induction devices - Google Patents

Improvements to terrestrial induction devices

Info

Publication number
FR550234A
FR550234A FR550234DA FR550234A FR 550234 A FR550234 A FR 550234A FR 550234D A FR550234D A FR 550234DA FR 550234 A FR550234 A FR 550234A
Authority
FR
France
Prior art keywords
terrestrial
induction devices
induction
devices
terrestrial induction
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
French (fr)
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.)
AERONAUTICAL INSTR Co
Original Assignee
AERONAUTICAL INSTR Co
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 AERONAUTICAL INSTR Co filed Critical AERONAUTICAL INSTR Co
Application granted granted Critical
Publication of FR550234A publication Critical patent/FR550234A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/28—Electromagnetic compasses
    • G01C17/30—Earth-inductor compasses

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR550234D 1921-08-13 1922-04-15 Improvements to terrestrial induction devices Expired FR550234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US550234XA 1921-08-13 1921-08-13

Publications (1)

Publication Number Publication Date
FR550234A true FR550234A (en) 1923-03-01

Family

ID=21995059

Family Applications (1)

Application Number Title Priority Date Filing Date
FR550234D Expired FR550234A (en) 1921-08-13 1922-04-15 Improvements to terrestrial induction devices

Country Status (1)

Country Link
FR (1) FR550234A (en)

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