FR1500836A - Improvements to horizontal direction tracking devices - Google Patents

Improvements to horizontal direction tracking devices

Info

Publication number
FR1500836A
FR1500836A FR61414A FR61414A FR1500836A FR 1500836 A FR1500836 A FR 1500836A FR 61414 A FR61414 A FR 61414A FR 61414 A FR61414 A FR 61414A FR 1500836 A FR1500836 A FR 1500836A
Authority
FR
France
Prior art keywords
horizontal direction
tracking devices
direction tracking
devices
horizontal
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
FR61414A
Other languages
French (fr)
Inventor
Andre Rouvier
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.)
Saint Gobain Techniques Nouvelles SA
Original Assignee
Saint Gobain Techniques Nouvelles 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 Saint Gobain Techniques Nouvelles SA filed Critical Saint Gobain Techniques Nouvelles SA
Priority to FR61414A priority Critical patent/FR1500836A/en
Application granted granted Critical
Publication of FR1500836A publication Critical patent/FR1500836A/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
    • 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
FR61414A 1966-05-13 1966-05-13 Improvements to horizontal direction tracking devices Expired FR1500836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR61414A FR1500836A (en) 1966-05-13 1966-05-13 Improvements to horizontal direction tracking devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR61414A FR1500836A (en) 1966-05-13 1966-05-13 Improvements to horizontal direction tracking devices

Publications (1)

Publication Number Publication Date
FR1500836A true FR1500836A (en) 1967-11-10

Family

ID=8608535

Family Applications (1)

Application Number Title Priority Date Filing Date
FR61414A Expired FR1500836A (en) 1966-05-13 1966-05-13 Improvements to horizontal direction tracking devices

Country Status (1)

Country Link
FR (1) FR1500836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004020944A1 (en) 2002-08-27 2004-03-11 Johnson Level & Tool Mfg. Co., Inc. Vial illumination for a tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004020944A1 (en) 2002-08-27 2004-03-11 Johnson Level & Tool Mfg. Co., Inc. Vial illumination for a tool
CN1678882B (en) * 2002-08-27 2010-12-15 约翰逊水平测量及工具制造有限公司 Vial illumination for a tool

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