FR825397A - Perfectionnements aux boussoles d'exploration - Google Patents

Perfectionnements aux boussoles d'exploration

Info

Publication number
FR825397A
FR825397A FR825397DA FR825397A FR 825397 A FR825397 A FR 825397A FR 825397D A FR825397D A FR 825397DA FR 825397 A FR825397 A FR 825397A
Authority
FR
France
Prior art keywords
compass
exploration
exploration compass
compass improvements
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)
Inventor
Pierre Chaix
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 FR825397A publication Critical patent/FR825397A/fr
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
    • G01C17/04—Magnetic compasses with north-seeking magnetic elements, e.g. needles
    • G01C17/10—Comparing observed direction with north indication
    • G01C17/12—Comparing observed direction with north indication by sighting means, e.g. for surveyors' compasses

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR825397D 1937-08-07 1937-08-07 Perfectionnements aux boussoles d'exploration Expired FR825397A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR825397T 1937-08-07

Publications (1)

Publication Number Publication Date
FR825397A true FR825397A (fr) 1938-03-02

Family

ID=9282334

Family Applications (1)

Application Number Title Priority Date Filing Date
FR825397D Expired FR825397A (fr) 1937-08-07 1937-08-07 Perfectionnements aux boussoles d'exploration

Country Status (1)

Country Link
FR (1) FR825397A (fr)

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