GB168505A - Improvements in levels - Google Patents
Improvements in levelsInfo
- Publication number
- GB168505A GB168505A GB2269720A GB2269720A GB168505A GB 168505 A GB168505 A GB 168505A GB 2269720 A GB2269720 A GB 2269720A GB 2269720 A GB2269720 A GB 2269720A GB 168505 A GB168505 A GB 168505A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- chamber
- bubble
- sealed
- smith
- 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
- G01C1/00—Measuring angles
- G01C1/08—Sextants
- G01C1/10—Sextants including an artificial horizon
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Percussion Or Vibration Massage (AREA)
Abstract
168,505. Smith, W. S., and Smith, G. L. July 30, 1920. Levels.-In a variable-bubble level for use with sextants &c., the liquid-chamber has means for regulating its capacity in an hermetically sealed manner, and the bubble chamber is initially charged with de-aerated liquid and is then sealed off full of liquid, so that a bubble of gas or vapour of the liquid of any desired size may be formed by adjusting the regulating-means so as to increase the capacity of the liquid-chamber. In the form shown in Fig. 1, the liquid-chamber 3, which can be sealed off by the tube 6, is closed by top and bottom lenses 5 and has a flexible wall which can be adjusted by the screwed parts 7, 8. Backlash is taken up by a spring 11. In the form shown in Fig. 2, the chamber 3 communicates with an auxiliary chamber 4 containing a a flexible diaphragm which can be adjusted by the screwed parts 9, 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2269720A GB168505A (en) | 1920-07-30 | 1920-07-30 | Improvements in levels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2269720A GB168505A (en) | 1920-07-30 | 1920-07-30 | Improvements in levels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB168505A true GB168505A (en) | 1921-09-08 |
Family
ID=10183630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2269720A Expired GB168505A (en) | 1920-07-30 | 1920-07-30 | Improvements in levels |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB168505A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747060C (en) * | 1939-03-07 | 1944-09-06 | Deutsche Telephonwerk Kabel | Device for dragonflies to automatically keep the bubble size equal |
| DE749514C (en) * | 1941-12-24 | 1945-01-12 | Dragonfly, especially air dome circular level | |
| DE756694C (en) * | 1939-11-19 | 1953-01-19 | Kabelindustrie A G | Procedure for filling dragonflies |
-
1920
- 1920-07-30 GB GB2269720A patent/GB168505A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747060C (en) * | 1939-03-07 | 1944-09-06 | Deutsche Telephonwerk Kabel | Device for dragonflies to automatically keep the bubble size equal |
| DE756694C (en) * | 1939-11-19 | 1953-01-19 | Kabelindustrie A G | Procedure for filling dragonflies |
| DE749514C (en) * | 1941-12-24 | 1945-01-12 | Dragonfly, especially air dome circular level |
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