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FR509645A - Tele-topographic board - Google Patents

Tele-topographic board

Info

Publication number
FR509645A
FR509645A FR509645A FR509645DA FR509645A FR 509645 A FR509645 A FR 509645A FR 509645 A FR509645 A FR 509645A FR 509645D A FR509645D A FR 509645DA FR 509645 A FR509645 A FR 509645A
Authority
FR
France
Prior art keywords
topographic
tele
board
topographic board
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
FR509645A
Other languages
French (fr)
Inventor
Antoine-Francois Benoit
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.)
ANTOINE FRANCOIS BENOIT
Original Assignee
ANTOINE FRANCOIS BENOIT
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 ANTOINE FRANCOIS BENOIT filed Critical ANTOINE FRANCOIS BENOIT
Application granted granted Critical
Publication of FR509645A publication Critical patent/FR509645A/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)
FR509645A 1919-04-09 1919-04-09 Tele-topographic board Expired FR509645A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR509645T 1919-04-09

Publications (1)

Publication Number Publication Date
FR509645A true FR509645A (en) 1920-11-16

Family

ID=8911152

Family Applications (1)

Application Number Title Priority Date Filing Date
FR509645A Expired FR509645A (en) 1919-04-09 1919-04-09 Tele-topographic board

Country Status (1)

Country Link
FR (1) FR509645A (en)

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