FR881819A - Improvement in orientation compasses - Google Patents

Improvement in orientation compasses

Info

Publication number
FR881819A
FR881819A FR881819DA FR881819A FR 881819 A FR881819 A FR 881819A FR 881819D A FR881819D A FR 881819DA FR 881819 A FR881819 A FR 881819A
Authority
FR
France
Prior art keywords
compasses
orientation
improvement
orientation compasses
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)
Inventor
Arvid Jonsson
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 filed Critical
Application granted granted Critical
Publication of FR881819A publication Critical patent/FR881819A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR881819D 1942-05-06 1942-05-06 Improvement in orientation compasses Expired FR881819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR881819T 1942-05-06

Publications (1)

Publication Number Publication Date
FR881819A true FR881819A (en) 1943-05-10

Family

ID=9373767

Family Applications (1)

Application Number Title Priority Date Filing Date
FR881819D Expired FR881819A (en) 1942-05-06 1942-05-06 Improvement in orientation compasses

Country Status (1)

Country Link
FR (1) FR881819A (en)

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