FR552915A - Compass refinements - Google Patents

Compass refinements

Info

Publication number
FR552915A
FR552915A FR552915DA FR552915A FR 552915 A FR552915 A FR 552915A FR 552915D A FR552915D A FR 552915DA FR 552915 A FR552915 A FR 552915A
Authority
FR
France
Prior art keywords
refinements
compass
compass refinements
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 FR552915A publication Critical patent/FR552915A/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)
FR552915D 1922-01-11 1922-04-15 Compass refinements Expired FR552915A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US552915XA 1922-01-11 1922-01-11

Publications (1)

Publication Number Publication Date
FR552915A true FR552915A (en) 1923-05-09

Family

ID=21996923

Family Applications (1)

Application Number Title Priority Date Filing Date
FR552915D Expired FR552915A (en) 1922-01-11 1922-04-15 Compass refinements

Country Status (1)

Country Link
FR (1) FR552915A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749348C (en) * 1940-03-07 1944-12-16 Induction compass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749348C (en) * 1940-03-07 1944-12-16 Induction compass

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