GB895832A - Improvements in and relating to electrical indicating, measuring or control apparatus and the like - Google Patents
Improvements in and relating to electrical indicating, measuring or control apparatus and the likeInfo
- Publication number
- GB895832A GB895832A GB1717457A GB1717457A GB895832A GB 895832 A GB895832 A GB 895832A GB 1717457 A GB1717457 A GB 1717457A GB 1717457 A GB1717457 A GB 1717457A GB 895832 A GB895832 A GB 895832A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- relay
- circuit
- valve
- kerr
- 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
- G01F23/265—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 for discrete levels
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
895,832. Valve relay circuits. KERR Ltd., GORING, and KERR, B. G. May 29, 1958 [May 30, 1957], No. 171714/57. Class 40(6). [Also in Group XXXVI] In a liquid level gauge (see Group XXXVI), a valve relay circuit is controlled by variation in the capacitance of a pair of electrodes. In Fig. 2 of the Provisional Specification the upper plates of capacitors 28, 29 are formed by the sensitive electrodes and are connected in a bridge circuit fed from an electroncoupled oscillator 22 via lead 12. When the bridge is unbalanced by the approaching level the output is taken from the resonant circuit 31, rectified at 16 and fed via lead 12 to operate a valve relay circuit 17, 18. Operation of relay 18 energizes lamp 19. The D.C. voltage developed by the lamp current in lead 25, provides positive feedback for valve 17 and hence more definite relay operation. Fig. 1 (not shown) of the Complete Specification relates to a relay circuit in which the bridge containing the sensitive electrodes is connected in the feedback path of an amplifier which becomes oscillatory when the bridge is unbalanced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1717457A GB895832A (en) | 1957-05-30 | 1957-05-30 | Improvements in and relating to electrical indicating, measuring or control apparatus and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1717457A GB895832A (en) | 1957-05-30 | 1957-05-30 | Improvements in and relating to electrical indicating, measuring or control apparatus and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB895832A true GB895832A (en) | 1962-05-09 |
Family
ID=10090563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1717457A Expired GB895832A (en) | 1957-05-30 | 1957-05-30 | Improvements in and relating to electrical indicating, measuring or control apparatus and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB895832A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1907019A1 (en) * | 1968-02-13 | 1969-11-13 | Rank Xerox Ltd | Method and device for determining the amount of a substance present in a container |
| GB2210463A (en) * | 1987-10-02 | 1989-06-07 | Atomic Energy Authority Uk | Electrode assembly |
-
1957
- 1957-05-30 GB GB1717457A patent/GB895832A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1907019A1 (en) * | 1968-02-13 | 1969-11-13 | Rank Xerox Ltd | Method and device for determining the amount of a substance present in a container |
| GB2210463A (en) * | 1987-10-02 | 1989-06-07 | Atomic Energy Authority Uk | Electrode assembly |
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