GB798212A - Improvements in or relating to means for controlling the level of a liquid in a container - Google Patents
Improvements in or relating to means for controlling the level of a liquid in a containerInfo
- Publication number
- GB798212A GB798212A GB3021954A GB3021954A GB798212A GB 798212 A GB798212 A GB 798212A GB 3021954 A GB3021954 A GB 3021954A GB 3021954 A GB3021954 A GB 3021954A GB 798212 A GB798212 A GB 798212A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- level
- relay
- electrodes
- electrode
- 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
798,212. Automatic liquid level control systems. BROADWELL ENGINEERING CO., Ltd. Oct. 18, 1955 [Oct. 20, 1954], No. 302 19/54 Class 38 (4). In a floatless type of liquid level control system in which an electric motor-driven pump is automatically controlled through an electromagnetic relay and a motor starter when the liquid reaches a predetermined level and means associated with the motor starter maintain the condition of the relay and hence the pump until the level has changed to a predetermined extent, alternating current is passed through the liquid and the relay is energized from an A.C. supply through a bridge rectifier. As shown, when the level of liquid in a metal container C rises to make contact with an electrode 6 a circuit is completed between electrodes 3 and 6 to energize a relay 10 from an A.C. source 1 through a transformer 4 and a rectifier 5. The consequent closing of relay contacts 11 starts an electric motor driven pump (not shown) which extracts liquid from the container, and the closing of contacts 7 associated with the motor starter ensures that extraction continues until the level falls below the lower end of an electrode 8. Electrode 3 may be replaced by the metal stem of the pump or the metal container itself. A resistor may be included in series with the supply to rectifier 5, or the spacing or sizes of the electrodes may be varied, to suit the conductivity of the liquid. The electrodes may be telescopic to facilitate selection of levels.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3021954A GB798212A (en) | 1954-10-20 | 1954-10-20 | Improvements in or relating to means for controlling the level of a liquid in a container |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3021954A GB798212A (en) | 1954-10-20 | 1954-10-20 | Improvements in or relating to means for controlling the level of a liquid in a container |
Publications (1)
Publication Number | Publication Date |
---|---|
GB798212A true GB798212A (en) | 1958-07-16 |
Family
ID=10304187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3021954A Expired GB798212A (en) | 1954-10-20 | 1954-10-20 | Improvements in or relating to means for controlling the level of a liquid in a container |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB798212A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101799692A (en) * | 2010-04-14 | 2010-08-11 | 宁波市镇海华泰电器厂 | Water level control method and device for control signal acquired from earth |
CN101684661B (en) * | 2009-08-18 | 2011-05-11 | 蚌埠市以马内利电器有限公司 | Two-way control water supply device |
CN104851425A (en) * | 2015-05-30 | 2015-08-19 | 宁波摩米创新工场电子科技有限公司 | High-definition voice identification system based on symmetric triode amplification circuit |
-
1954
- 1954-10-20 GB GB3021954A patent/GB798212A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101684661B (en) * | 2009-08-18 | 2011-05-11 | 蚌埠市以马内利电器有限公司 | Two-way control water supply device |
CN101799692A (en) * | 2010-04-14 | 2010-08-11 | 宁波市镇海华泰电器厂 | Water level control method and device for control signal acquired from earth |
CN104851425A (en) * | 2015-05-30 | 2015-08-19 | 宁波摩米创新工场电子科技有限公司 | High-definition voice identification system based on symmetric triode amplification circuit |
CN104851425B (en) * | 2015-05-30 | 2018-11-30 | 宁波摩米创新工场电子科技有限公司 | A kind of high definition speech recognition system based on symmetrical transistor amplifier |
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