GB560872A - Improvements relating to electrical measuring or indicating systems - Google Patents
Improvements relating to electrical measuring or indicating systemsInfo
- Publication number
- GB560872A GB560872A GB1466342A GB1466342A GB560872A GB 560872 A GB560872 A GB 560872A GB 1466342 A GB1466342 A GB 1466342A GB 1466342 A GB1466342 A GB 1466342A GB 560872 A GB560872 A GB 560872A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- measuring
- liquid container
- rectifier unit
- liquid
- 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
- G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
560,872. Correspondence control systems. SMITH, S. J. Oct. 20, 1942, No. 14663. [Class 40 (i)] [Also in Group XXXVI] A liquid level indicating system comprises a power unit 22, Fig. 2, a rectifier unit 23, a measuring condenser 24 and a d.c. ratiometer 25. The power unit 22 comprises an oscillator generating a.c. at a frequency of about 20,000 cycles per second and energized from a lowtension d.c. supply through a vibratory converter 27. The output is fed to the rectifier unit 23 comprising a pair of step-down transformers 30, 31 and rectifiers 32, 33. The a.c. flows through two circuits in parallel, one comprising the primary of the transformer 30 and the measuring condenser 24 and the other comprising the primary of the transformer 31 and a reference condenser 35. The secondary windings of the transformers 30, 31 are connected through rectifiers 32, 33 to the separate coils of the ratiometer 25. The reference condenser 35 may be variable for zero adjustment. The measuring condenser 24 consists of two coaxial metal tubes 16, 17, Fig. 3, arranged vertically in and extending from the top to the bottom of the liquid container. At their lower ends the tubes are spaced apart by an insulating ring 18 and at their upper ends are secured to a flanged head 19 for securing the assembly to the top of the liquid container. Gauze-covered apertures 20 are provided to permit passage of air and liquid. The rectifier unit 23 may be housed within the flanged head 19. A number of measuring condensers connected in parallel may be arranged at selected points in the liquid container so that changes in attitude do not affect the reading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1466342A GB560872A (en) | 1942-10-20 | 1942-10-20 | Improvements relating to electrical measuring or indicating systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1466342A GB560872A (en) | 1942-10-20 | 1942-10-20 | Improvements relating to electrical measuring or indicating systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB560872A true GB560872A (en) | 1944-04-25 |
Family
ID=10045334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1466342A Expired GB560872A (en) | 1942-10-20 | 1942-10-20 | Improvements relating to electrical measuring or indicating systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB560872A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2142145A (en) * | 1983-04-27 | 1985-01-09 | Electronic Components Ltd | Liquid level sensing apparatus |
-
1942
- 1942-10-20 GB GB1466342A patent/GB560872A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2142145A (en) * | 1983-04-27 | 1985-01-09 | Electronic Components Ltd | Liquid level sensing apparatus |
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