GB595750A - Improvements in or relating to liquid level operated electrical control gear - Google Patents
Improvements in or relating to liquid level operated electrical control gearInfo
- Publication number
- GB595750A GB595750A GB940144A GB940144A GB595750A GB 595750 A GB595750 A GB 595750A GB 940144 A GB940144 A GB 940144A GB 940144 A GB940144 A GB 940144A GB 595750 A GB595750 A GB 595750A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- relay
- circuit
- energised
- level
- 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
- 239000007788 liquid Substances 0.000 title abstract 8
- 239000012153 distilled water Substances 0.000 abstract 1
- 230000002441 reversible Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B1/00—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values
- G05B1/01—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric
- G05B1/02—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric for comparing analogue signals
- G05B1/025—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric for comparing analogue signals using inductance means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/18—Switches operated by change of liquid level or of liquid density, e.g. float switch
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
595,750. Indicating liquid-levels. HOLDEN, W. B., and CHANCELLOR, W. H. May 16, 1944, No. 9401. [Class 123 (i)] [Also in Group XXXV] An electric system for controlling or indicating liquid-level, comprises a receptacle having an electrode energised by a transformer so that current flows through the liquid and a rectifier to energise a D.C, operating relay. The control or indicating circuit 2, 3 comprises a direct current relay 5 energised through a rectifier 8 from a mains energised transformer 1, the secondary circuit being completed through any number of electrodes 12, 13 in a receptacle 14 containing distilled water or other conducting liquid, the level of which is variable to control the circuit. Two-way switches 4, 9 both shown in the de-energised position, are operated by the relay 5. When the level of the liquid rises to the electrode 12, current passes through the rectifier, through contact 10 and operates the relay to engage, before leaving contact 10, a contact 11 connected to the electrode 13 which, being deeper in the liquid causes the relay to hold in firmly. The circuit 2, 3, may control a pump to reduce the liquid level in the container and when this falls below the electrode 13 the relay de-energises the circuit. A manually operated two-way switch 7 is connected so that, on reversal, the liquid level may be made to rise when the circuit is energised.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB595750A true GB595750A (en) | 1947-12-16 |
Family
ID=1629791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB940144A Expired GB595750A (en) | 1944-05-16 | Improvements in or relating to liquid level operated electrical control gear |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB595750A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092991B (en) * | 1956-09-26 | 1960-11-17 | Lehner Fernsprech Signal | Arrangement for regulating the level in a container for electrically conductive filling material in rooms at risk of explosion |
| US3352246A (en) * | 1965-10-14 | 1967-11-14 | C D M Kabushiki Kaisha | Automatic submersible pump |
| CN113658823A (en) * | 2021-09-14 | 2021-11-16 | 国网安徽省电力有限公司培训中心 | Low-contact resistance and earth-saving high-voltage isolating switch |
-
1944
- 1944-05-16 GB GB940144A patent/GB595750A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1092991B (en) * | 1956-09-26 | 1960-11-17 | Lehner Fernsprech Signal | Arrangement for regulating the level in a container for electrically conductive filling material in rooms at risk of explosion |
| US3352246A (en) * | 1965-10-14 | 1967-11-14 | C D M Kabushiki Kaisha | Automatic submersible pump |
| CN113658823A (en) * | 2021-09-14 | 2021-11-16 | 国网安徽省电力有限公司培训中心 | Low-contact resistance and earth-saving high-voltage isolating switch |
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