FR662665A - Improvements to navigation instruments - Google Patents

Improvements to navigation instruments

Info

Publication number
FR662665A
FR662665A FR662665DA FR662665A FR 662665 A FR662665 A FR 662665A FR 662665D A FR662665D A FR 662665DA FR 662665 A FR662665 A FR 662665A
Authority
FR
France
Prior art keywords
navigation instruments
navigation
instruments
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)
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.)
Optique et Precision de Levallois SA
Original Assignee
Optique et Precision de Levallois SA
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 Optique et Precision de Levallois SA filed Critical Optique et Precision de Levallois SA
Application granted granted Critical
Publication of FR662665A publication Critical patent/FR662665A/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
    • G01C1/00—Measuring angles
    • G01C1/08—Sextants
    • G01C1/10—Sextants including an artificial horizon
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
    • G01C9/24—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble
    • G01C9/26—Details
    • G01C9/32—Means for facilitating the observation of the position of the bubble, e.g. illuminating means

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
FR662665D 1928-09-25 1928-09-25 Improvements to navigation instruments Expired FR662665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR662665T 1928-09-25

Publications (1)

Publication Number Publication Date
FR662665A true FR662665A (en) 1929-08-09

Family

ID=9011633

Family Applications (1)

Application Number Title Priority Date Filing Date
FR662665D Expired FR662665A (en) 1928-09-25 1928-09-25 Improvements to navigation instruments

Country Status (1)

Country Link
FR (1) FR662665A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756036C (en) * 1938-12-18 1953-03-09 Kabelindustrie A G Observation device for dragonflies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756036C (en) * 1938-12-18 1953-03-09 Kabelindustrie A G Observation device for dragonflies

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