FR884389A - Sighting or pointing device, in particular for compasses, instruments for measuring angles of height and the like, such as a compass and instrument for measuring angles of height, provided with such an apparatus - Google Patents

Sighting or pointing device, in particular for compasses, instruments for measuring angles of height and the like, such as a compass and instrument for measuring angles of height, provided with such an apparatus

Info

Publication number
FR884389A
FR884389A FR884389DA FR884389A FR 884389 A FR884389 A FR 884389A FR 884389D A FR884389D A FR 884389DA FR 884389 A FR884389 A FR 884389A
Authority
FR
France
Prior art keywords
height
measuring angles
compasses
sighting
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
Elisa Raisanen Veuve Vohlonen
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 FR884389A publication Critical patent/FR884389A/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)
FR884389D 1940-12-02 1940-12-02 Sighting or pointing device, in particular for compasses, instruments for measuring angles of height and the like, such as a compass and instrument for measuring angles of height, provided with such an apparatus Expired FR884389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR884389T 1940-12-02

Publications (1)

Publication Number Publication Date
FR884389A true FR884389A (en) 1943-08-11

Family

ID=9374956

Family Applications (1)

Application Number Title Priority Date Filing Date
FR884389D Expired FR884389A (en) 1940-12-02 1940-12-02 Sighting or pointing device, in particular for compasses, instruments for measuring angles of height and the like, such as a compass and instrument for measuring angles of height, provided with such an apparatus

Country Status (1)

Country Link
FR (1) FR884389A (en)

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