GB673988A - Improvements in or relating to indicating instruments - Google Patents
Improvements in or relating to indicating instrumentsInfo
- Publication number
- GB673988A GB673988A GB2259749A GB2259749A GB673988A GB 673988 A GB673988 A GB 673988A GB 2259749 A GB2259749 A GB 2259749A GB 2259749 A GB2259749 A GB 2259749A GB 673988 A GB673988 A GB 673988A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- condenser
- constant
- dielectric
- tank
- 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
- G01F23/266—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 measuring circuits therefor
Abstract
673,988. Capacitor measurements. SMITH & SONS (ENGLAND), Ltd., S. Aug. 18, 1950 [Aug. 31, 1949], No. 22597/49. Class 37. In a device for measuring the liquid contents of a tank using a condenser the dielectric of of which is formed partly by the liquid, the weight of the liquid, corrected for variations in density due, e.g. to temperature variations, is indicated. Liquid is pumped continuously by a pump 22 from the tank 18, Fig. 2, containing the liquid to be measured into a tank 17 where the liquid level is maintained constant by a return tube 23. Floating in the liquid in the tank 17 is a reference condenser 1 the dielectric of which is also formed in part by the liquid. Its capacity is of the form A+B(K - 1)/P where A is the condenser capacity when the dielectric is air, B is a constant, K the dielectric constant of the liquid and P its density. The measuring condenser 2 consists of the usual fixed immersion type condensers in parallel, the combined capacity of which is of the form C+D.V(K - 1) where C is the capacity when the dielectric is air, D is a constant and V the liquid volume whose weight is to be measured. A trimming condenser 3, series connected with the reference condenser 1, Fig. 1, across the secondary 7 of a supply transformer 5 is adjusted in value to the constant A so that the rectified current flow through the winding 9 of a ratio meter 9, 10, will, provided the impedance values of the elements concerned are appropriately selected, be proportional to the difference of the capacitances of condensers 1, 3, i.e. to B(K - 1)/P. Similarly the measuring condenser 2 is series connected with a condenser 4, adjusted in value to the constant C, across the transformer secondary 8 so that the rectified differential current flow through the meter winding 10 is proportional to D.V(K- 1). The quotient meter indication is thus proportional to V.P, i.e. the weight of the liquid volume V. The quotient meter may be as described in Specification 561,866.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2259749A GB673988A (en) | 1949-08-31 | 1949-08-31 | Improvements in or relating to indicating instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2259749A GB673988A (en) | 1949-08-31 | 1949-08-31 | Improvements in or relating to indicating instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB673988A true GB673988A (en) | 1952-06-18 |
Family
ID=10182020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2259749A Expired GB673988A (en) | 1949-08-31 | 1949-08-31 | Improvements in or relating to indicating instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB673988A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2760372A (en) * | 1953-08-03 | 1956-08-28 | Honeywell Regulator Co | Fluid quantity measuring apparatus |
| US4479116A (en) * | 1981-08-27 | 1984-10-23 | Nissan Motor Company, Limited | Capacitive type fuel level and impurity indicator |
-
1949
- 1949-08-31 GB GB2259749A patent/GB673988A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2760372A (en) * | 1953-08-03 | 1956-08-28 | Honeywell Regulator Co | Fluid quantity measuring apparatus |
| US4479116A (en) * | 1981-08-27 | 1984-10-23 | Nissan Motor Company, Limited | Capacitive type fuel level and impurity indicator |
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