FR390728A - Survey instrument - Google Patents

Survey instrument

Info

Publication number
FR390728A
FR390728A FR390728DA FR390728A FR 390728 A FR390728 A FR 390728A FR 390728D A FR390728D A FR 390728DA FR 390728 A FR390728 A FR 390728A
Authority
FR
France
Prior art keywords
survey instrument
survey
instrument
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
Georges Boyelle-Morin
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.)
GEORGES BOYELLE MORIN
Original Assignee
GEORGES BOYELLE MORIN
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 GEORGES BOYELLE MORIN filed Critical GEORGES BOYELLE MORIN
Application granted granted Critical
Publication of FR390728A publication Critical patent/FR390728A/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
    • G01C17/04—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)
FR390728D 1908-04-09 1908-04-09 Survey instrument Expired FR390728A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR390728T 1908-04-09

Publications (1)

Publication Number Publication Date
FR390728A true FR390728A (en) 1908-10-13

Family

ID=1436242

Family Applications (1)

Application Number Title Priority Date Filing Date
FR390728D Expired FR390728A (en) 1908-04-09 1908-04-09 Survey instrument

Country Status (1)

Country Link
FR (1) FR390728A (en)

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