FR662664A - Improvement in spirit levels - Google Patents
Improvement in spirit levelsInfo
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
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)
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 |
-
1928
- 1928-09-25 FR FR662664D patent/FR662664A/en not_active Expired
Cited By (5)
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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