FR2274891A1 - Dispositif permettant de determiner avec precision une direction perpendiculaire a un plan - Google Patents

Dispositif permettant de determiner avec precision une direction perpendiculaire a un plan

Info

Publication number
FR2274891A1
FR2274891A1 FR7420736A FR7420736A FR2274891A1 FR 2274891 A1 FR2274891 A1 FR 2274891A1 FR 7420736 A FR7420736 A FR 7420736A FR 7420736 A FR7420736 A FR 7420736A FR 2274891 A1 FR2274891 A1 FR 2274891A1
Authority
FR
France
Prior art keywords
tube
optical
image onto
base
screen
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.)
Granted
Application number
FR7420736A
Other languages
English (en)
French (fr)
Other versions
FR2274891B3 (https=
Inventor
Jean Stephane Legris
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.)
MORIN SECRETAN RECH PERFEC
Original Assignee
MORIN SECRETAN RECH PERFEC
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 MORIN SECRETAN RECH PERFEC filed Critical MORIN SECRETAN RECH PERFEC
Priority to FR7420736A priority Critical patent/FR2274891A1/fr
Publication of FR2274891A1 publication Critical patent/FR2274891A1/fr
Application granted granted Critical
Publication of FR2274891B3 publication Critical patent/FR2274891B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/10—Plumb lines
    • G01C15/105—Optical plumbing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/12—Instruments for setting out fixed angles, e.g. right angles
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
FR7420736A 1974-06-14 1974-06-14 Dispositif permettant de determiner avec precision une direction perpendiculaire a un plan Granted FR2274891A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7420736A FR2274891A1 (fr) 1974-06-14 1974-06-14 Dispositif permettant de determiner avec precision une direction perpendiculaire a un plan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7420736A FR2274891A1 (fr) 1974-06-14 1974-06-14 Dispositif permettant de determiner avec precision une direction perpendiculaire a un plan

Publications (2)

Publication Number Publication Date
FR2274891A1 true FR2274891A1 (fr) 1976-01-09
FR2274891B3 FR2274891B3 (https=) 1977-04-08

Family

ID=9140082

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7420736A Granted FR2274891A1 (fr) 1974-06-14 1974-06-14 Dispositif permettant de determiner avec precision une direction perpendiculaire a un plan

Country Status (1)

Country Link
FR (1) FR2274891A1 (https=)

Also Published As

Publication number Publication date
FR2274891B3 (https=) 1977-04-08

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Legal Events

Date Code Title Description
ST Notification of lapse
TP Transmission of property