FR859739A - Improvements to aiming and topographic plotting boards - Google Patents

Improvements to aiming and topographic plotting boards

Info

Publication number
FR859739A
FR859739A FR859739DA FR859739A FR 859739 A FR859739 A FR 859739A FR 859739D A FR859739D A FR 859739DA FR 859739 A FR859739 A FR 859739A
Authority
FR
France
Prior art keywords
topographic
aiming
plotting boards
plotting
boards
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
Pierre-Louis-Maurice Chaix
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 FR859739A publication Critical patent/FR859739A/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)
FR859739D 1939-05-25 1939-05-25 Improvements to aiming and topographic plotting boards Expired FR859739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR859739T 1939-05-25

Publications (1)

Publication Number Publication Date
FR859739A true FR859739A (en) 1940-12-27

Family

ID=9330610

Family Applications (1)

Application Number Title Priority Date Filing Date
FR859739D Expired FR859739A (en) 1939-05-25 1939-05-25 Improvements to aiming and topographic plotting boards

Country Status (1)

Country Link
FR (1) FR859739A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674804A (en) * 1953-02-05 1954-04-13 Robert E Reinhardt Computing device
US2916207A (en) * 1958-01-08 1959-12-08 Marion G Vohland Celestial fix plotter
US2945300A (en) * 1956-04-12 1960-07-19 Khol Frantisek Apparatus for the evaluation of x-ray photographs
US6256900B1 (en) * 1999-11-19 2001-07-10 Charles L. Myers Sine set miter gauge and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674804A (en) * 1953-02-05 1954-04-13 Robert E Reinhardt Computing device
US2945300A (en) * 1956-04-12 1960-07-19 Khol Frantisek Apparatus for the evaluation of x-ray photographs
US2916207A (en) * 1958-01-08 1959-12-08 Marion G Vohland Celestial fix plotter
US6256900B1 (en) * 1999-11-19 2001-07-10 Charles L. Myers Sine set miter gauge and method

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