FR517721A - Perfectionnements aux boussoles marines, aériennes et autres compas de navigation - Google Patents

Perfectionnements aux boussoles marines, aériennes et autres compas de navigation

Info

Publication number
FR517721A
FR517721A FR517721A FR517721DA FR517721A FR 517721 A FR517721 A FR 517721A FR 517721 A FR517721 A FR 517721A FR 517721D A FR517721D A FR 517721DA FR 517721 A FR517721 A FR 517721A
Authority
FR
France
Prior art keywords
compasses
aerial
marine
navigation
navigation 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
FR517721A
Other languages
English (en)
Inventor
Robert Sanderson Stephen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR517721A publication Critical patent/FR517721A/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
    • G01C17/14—Comparing observed direction with north indication by reference marks, e.g. for ships' compasses

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR517721A 1919-04-17 1920-06-24 Perfectionnements aux boussoles marines, aériennes et autres compas de navigation Expired FR517721A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB517721X 1919-04-17

Publications (1)

Publication Number Publication Date
FR517721A true FR517721A (fr) 1921-05-10

Family

ID=10461317

Family Applications (1)

Application Number Title Priority Date Filing Date
FR517721A Expired FR517721A (fr) 1919-04-17 1920-06-24 Perfectionnements aux boussoles marines, aériennes et autres compas de navigation

Country Status (1)

Country Link
FR (1) FR517721A (fr)

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