GB2012046A - Levelling device - Google Patents
Levelling deviceInfo
- Publication number
- GB2012046A GB2012046A GB7845671A GB7845671A GB2012046A GB 2012046 A GB2012046 A GB 2012046A GB 7845671 A GB7845671 A GB 7845671A GB 7845671 A GB7845671 A GB 7845671A GB 2012046 A GB2012046 A GB 2012046A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stem
- ring
- tube
- cap
- valve
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/04—Hydrostatic levelling, i.e. by flexibly interconnected liquid containers at separated points
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Level Indicators Using A Float (AREA)
Abstract
A levelling device of the kind adapted to locate points in the same horizontal plane has a fluid-filled flexible tube 1 with a valve 2 at each end, which comprises a spring 17-loaded manually operable cap 8 loosely supporting a valve stem 12 which in the closed ("storage") position shown in Figure 2a closes the tube by means of an O-ring 13. In the open ("in use") position, the cap is fastened 26, 27 in a depressed position so that the stem is lowered and the O-ring does not seal and so allows the passage of air during a levelling operation; however, if the fluid rises too far it raises a float 11 on the stem to bring the O-ring back to a sealing position. The tube includes a transparent portion 3 with a horizontal sighting block 4 slidable therealong. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7845671A GB2012046B (en) | 1978-01-06 | 1978-11-22 | Levelling device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB43578 | 1978-01-06 | ||
GB7845671A GB2012046B (en) | 1978-01-06 | 1978-11-22 | Levelling device |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2012046A true GB2012046A (en) | 1979-07-18 |
GB2012046B GB2012046B (en) | 1982-09-02 |
Family
ID=26235921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7845671A Expired GB2012046B (en) | 1978-01-06 | 1978-11-22 | Levelling device |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2012046B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2650665A1 (en) * | 1989-08-07 | 1991-02-08 | Chevalier Yvon | Level with communicating vessels |
-
1978
- 1978-11-22 GB GB7845671A patent/GB2012046B/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2650665A1 (en) * | 1989-08-07 | 1991-02-08 | Chevalier Yvon | Level with communicating vessels |
Also Published As
Publication number | Publication date |
---|---|
GB2012046B (en) | 1982-09-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
NZ191863A (en) | Fluid soluble material container adjustably projects into fluid stream | |
SE8102452L (en) | FLOW TYPE CONTROL DEVICE | |
ES454973A1 (en) | Purged valve assembly and method of sealing | |
ATE166455T1 (en) | TUBULAR SPRING PRESSURE GAUGE DEVICE | |
GB2012046A (en) | Levelling device | |
GB1370406A (en) | Apparatus for testing leakage | |
GB1287872A (en) | ||
US2781708A (en) | Self-contained developing unit | |
ES458268A1 (en) | Top closure for control rod drive for nuclear reactor | |
GB367251A (en) | Improvements in altimeters and rate of climb indicators | |
FR2296135A1 (en) | FLUID FLOW CONTROL VALVE WITH ARTICULATED SHUTTER | |
GB2012885A (en) | A Valve for Separate Dispensing of Two Components and Mixing Thereof Outside of the Valve | |
FR2368082A1 (en) | PRESSURE REGULATOR | |
FR2334523A1 (en) | Pressure relief valve for petrol tank - has interior and exterior synthetic rubber joints and flexible stainless steel diaphragm | |
GB2005034A (en) | Fluid flow indicator | |
GB2008521A (en) | Vapour vent for aircraft tank | |
US2637760A (en) | Storage battery testing and filling apparatus | |
FR2254234A5 (en) | Liquid sampling device for a pipeline - utilises pressure difference generated by a venturi in the pipeline | |
GB2036968A (en) | Underwater levelling device | |
US3701391A (en) | Buoyancy type weighing scale | |
FR2292912A1 (en) | Automatic valve for closing pipeline - has membrane subjected to hydrostatic pressure from tank | |
GB627864A (en) | Improvements relating to liquid depth or ship's draught or displacement indicators | |
FR2102927A5 (en) | Overflow for mass transfer column tray | |
SE7812534L (en) | DEVICE FOR SHUTTER VALVES | |
JPS52136434A (en) | Protecting device for air and liquid leakage of tank |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |