GB1266887A - - Google Patents
Info
- Publication number
- GB1266887A GB1266887A GB1266887DA GB1266887A GB 1266887 A GB1266887 A GB 1266887A GB 1266887D A GB1266887D A GB 1266887DA GB 1266887 A GB1266887 A GB 1266887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oil
- tube
- effect
- temperature
- increase
- 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
- G01F23/24—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 resistance of resistors due to contact with conductor fluid
- G01F23/246—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 resistance of resistors due to contact with conductor fluid thermal devices
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
1,266,887. Measuring liquid level electrically. K. J. WOOD. Nov.3, 1969 [Nov.13, 1968], No.53774/68. Heading G1N. A liquid level indicator includes a metal e.g. brass tube 5 apertured at 8 to allow ingress of the liquid and a temperature sensitive resistance element 2 mounted in the tube 5 in the form of a V. When the tube 5 is inserted in a liquid 9 e.g. the oil sump of a motor car, variation in current flowing through the resistance element due to cooling of the element by the oil is detected by the unbalancing of a bridge circuit which includes the element 2 in one arm thereof. In order to compensate for the effect of increase in temperature of the oil due to running of the engine adjacent arm R1 of the bridge is also mounted in tube 5, the effect of which is to tend to increase the out of balance current which would normally be falling due to the increase in temperature of the oil. By ensuring that a small portion of the resistance element 2 is not immersed in the oil 9 further temperature compensation is obtained since this forms a non-linear resistance. Thus the total effect of this non-linear resistance and resistor R1 is that both arms of the bridge are altered in the direction required for compensation. The effect of the non-immersed part of the element 2 is also to compensate for the effects of battery voltage variations.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5377468 | 1968-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1266887A true GB1266887A (en) | 1972-03-15 |
Family
ID=10468933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1266887D Expired GB1266887A (en) | 1968-11-13 | 1968-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1266887A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2718295A1 (en) * | 1977-04-25 | 1978-10-26 | Hauser Verwaltungs Gmbh | Sump oil level indicator - has temperature sensitive heater element partially immersed in oil |
| FR2485726A1 (en) * | 1980-06-27 | 1981-12-31 | Veglia E D | PROBE FOR DETECTING A LIQUID LEVEL |
-
1968
- 1968-11-13 GB GB1266887D patent/GB1266887A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2718295A1 (en) * | 1977-04-25 | 1978-10-26 | Hauser Verwaltungs Gmbh | Sump oil level indicator - has temperature sensitive heater element partially immersed in oil |
| FR2485726A1 (en) * | 1980-06-27 | 1981-12-31 | Veglia E D | PROBE FOR DETECTING A LIQUID LEVEL |
| EP0043312A1 (en) * | 1980-06-27 | 1982-01-06 | e.d. VEGLIA | Probe for liquid-level detection |
| US4411155A (en) * | 1980-06-27 | 1983-10-25 | E.D. Veglia | Sensor for detecting the level of liquid in a tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |