FR662664A - Improvement in spirit levels - Google Patents

Improvement in spirit levels

Info

Publication number
FR662664A
FR662664A FR662664DA FR662664A FR 662664 A FR662664 A FR 662664A FR 662664D A FR662664D A FR 662664DA FR 662664 A FR662664 A FR 662664A
Authority
FR
France
Prior art keywords
improvement
spirit levels
levels
spirit
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 FR662664A publication Critical patent/FR662664A/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
    • G01C9/30—Means for adjusting dimensions of bubble
FR662664D 1928-09-25 1928-09-25 Improvement in spirit levels Expired FR662664A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR662664T 1928-09-25

Publications (1)

Publication Number Publication Date
FR662664A true FR662664A (en) 1929-08-09

Family

ID=9011632

Family Applications (1)

Application Number Title Priority Date Filing Date
FR662664D Expired FR662664A (en) 1928-09-25 1928-09-25 Improvement in spirit levels

Country Status (1)

Country Link
FR (1) FR662664A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745774C (en) * 1939-01-26 1944-05-19 Kabelindustrie Ag Circular vial
DE746086C (en) * 1937-06-25 1944-05-26 Bendix Aviat Corp Liquid vial, especially for sighting devices
DE747060C (en) * 1939-03-07 1944-09-06 Deutsche Telephonwerk Kabel Device for dragonflies to automatically keep the bubble size equal
FR2519425A1 (en) * 1981-12-31 1983-07-08 Buonamassa Antoine Gradient determining device adapted for bicycle - has transparent hollow cylinder into which coloured cylinder with centring wings slides against scale indicating required gear ratio
US5926965A (en) * 1996-07-26 1999-07-27 Asahi Kogaku Kogyo Kabushiki Kaisha Tilt sensor and top cover plate thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746086C (en) * 1937-06-25 1944-05-26 Bendix Aviat Corp Liquid vial, especially for sighting devices
DE745774C (en) * 1939-01-26 1944-05-19 Kabelindustrie Ag Circular vial
DE747060C (en) * 1939-03-07 1944-09-06 Deutsche Telephonwerk Kabel Device for dragonflies to automatically keep the bubble size equal
FR2519425A1 (en) * 1981-12-31 1983-07-08 Buonamassa Antoine Gradient determining device adapted for bicycle - has transparent hollow cylinder into which coloured cylinder with centring wings slides against scale indicating required gear ratio
US5926965A (en) * 1996-07-26 1999-07-27 Asahi Kogaku Kogyo Kabushiki Kaisha Tilt sensor and top cover plate thereof

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