FR452895A - Orientation dry compass device - Google Patents

Orientation dry compass device

Info

Publication number
FR452895A
FR452895A FR452895DA FR452895A FR 452895 A FR452895 A FR 452895A FR 452895D A FR452895D A FR 452895DA FR 452895 A FR452895 A FR 452895A
Authority
FR
France
Prior art keywords
compass device
orientation
dry
orientation dry
compass
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
Henri Rosenfeld
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.)
HENRI ROSENFELD
Original Assignee
HENRI ROSENFELD
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 HENRI ROSENFELD filed Critical HENRI ROSENFELD
Application granted granted Critical
Publication of FR452895A publication Critical patent/FR452895A/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)
FR452895D 1913-01-06 1913-01-06 Orientation dry compass device Expired FR452895A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR452895T 1913-01-06

Publications (1)

Publication Number Publication Date
FR452895A true FR452895A (en) 1913-05-24

Family

ID=1493057

Family Applications (1)

Application Number Title Priority Date Filing Date
FR452895D Expired FR452895A (en) 1913-01-06 1913-01-06 Orientation dry compass device

Country Status (1)

Country Link
FR (1) FR452895A (en)

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