GB852969A - Improvements relating to the measurement of liquid level - Google Patents
Improvements relating to the measurement of liquid levelInfo
- Publication number
- GB852969A GB852969A GB205358A GB205358A GB852969A GB 852969 A GB852969 A GB 852969A GB 205358 A GB205358 A GB 205358A GB 205358 A GB205358 A GB 205358A GB 852969 A GB852969 A GB 852969A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boiler
- magnet
- water
- proportional
- head
- 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
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/68—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means
- G01F23/70—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means for sensing changes in level only at discrete points
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
- G01R17/06—Automatic balancing arrangements
- G01R17/08—Automatic balancing arrangements in which a force or torque representing the measured value is balanced by a force or torque representing the reference value
Abstract
852,969. Electric measuring systems. EVERSHED & VIGNOLES Ltd. Jan. 20, 1959 [Jan. 21, 1958], No. 2053/58. Class 40 (1). In apparatus for indicating the level of water in a boiler, of the type described in Specification 639,370, in which a torque proportional to the hydrostatic head in the boiler is applied to a pivoted member and is balanced by a counter-torque, the indication is corrected for variation of pressure inside the boiler. As shown, the hydrostatic head of water 2 in a boiler 1 is measured by a mercury manometer 3 which includes a magnet 8 floating on the surface of the mercury and exerting a turning force on a magnet 11 pivoted at 12. Angular deflection of the magnet 11 causes a contact 25 at the end of an arm 19 to connect a capacitor 36, which controls the potential on the grid of a triode 32, to the positive or negative terminal 28 or 29 of a D.C. supply. The anode current from triode 32 is fed to a coil 17, mounted on the arm 19, which co-operates with an electromagnet 15, the coil 16 of which is fed from a transducer 21 with current proportional to the pressure inside boiler 1, to exert a restoring torque on the magnet 11. Since the head of water is proportional to the product of the anode current and the current from pressure transducer 21, the anode current, which is indicated on a meter 23, represents the ratio of head and pressure, which is indicative of the level of the water. Specification 589,423 also is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB205358A GB852969A (en) | 1958-01-21 | 1958-01-21 | Improvements relating to the measurement of liquid level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB205358A GB852969A (en) | 1958-01-21 | 1958-01-21 | Improvements relating to the measurement of liquid level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB852969A true GB852969A (en) | 1960-11-02 |
Family
ID=9732776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB205358A Expired GB852969A (en) | 1958-01-21 | 1958-01-21 | Improvements relating to the measurement of liquid level |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB852969A (en) |
-
1958
- 1958-01-21 GB GB205358A patent/GB852969A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB910977A (en) | Pressure responsive devices | |
| GB852969A (en) | Improvements relating to the measurement of liquid level | |
| US2551479A (en) | Electrical detection and measurement of fluid conditions | |
| US2542905A (en) | Apparatus for measuring pressure | |
| GB1401272A (en) | Flowmeters | |
| GB782534A (en) | Improvements in and relating to a method and an instrument for measuring a vacuum | |
| GB680311A (en) | Improvements in or relating to apparatus for the measurement of peak strain | |
| GB1264498A (en) | ||
| SE7610151L (en) | ELECTRONIC MEASUREMENT METER | |
| GB1066568A (en) | Improvements in or relating to flow meters | |
| GB1113168A (en) | Improvements in differential pressure gauge | |
| GB1533660A (en) | Pressure gauges | |
| SU149638A1 (en) | Device for measuring the velocity of a liquid or gas stream | |
| GB1086972A (en) | Earth pressure measuring apparatus | |
| GB804724A (en) | Improvements in or relating to devices for measuring pressures | |
| JPS5454093A (en) | Metal corrosion rate meter | |
| JPS57163836A (en) | Measuring device for degree of vacuum | |
| NL7111344A (en) | Measuring alkali metal concn - with glass electrode using sample with its alkalinity raised by cyclohexylamine addn | |
| GB942033A (en) | Improvements in or relating to strain measuring devices | |
| GB987807A (en) | Improvements in or relating to pressure measuring apparatus | |
| GB566361A (en) | Improvements in or relating to devices or instrument for measuring, or for compensating for variations in fluid pressures | |
| GB679503A (en) | Improvements in and relating to pressure gauges | |
| GB693521A (en) | Improvements in or relating to apparatus for determining the position of a mercury meniscus | |
| GB1224161A (en) | Improvements in or relating to fluid pressure indicating devices | |
| GB784729A (en) | Improvements in or relating to liquid level indicating system |