GB905193A - Improvements in and relating to means for controlling hydrogen ion concentration - Google Patents
Improvements in and relating to means for controlling hydrogen ion concentrationInfo
- Publication number
- GB905193A GB905193A GB608858A GB608858A GB905193A GB 905193 A GB905193 A GB 905193A GB 608858 A GB608858 A GB 608858A GB 608858 A GB608858 A GB 608858A GB 905193 A GB905193 A GB 905193A
- Authority
- GB
- United Kingdom
- Prior art keywords
- value
- liquid
- motors
- valve
- 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
- G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
- G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value 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 Non-Electrical Variables (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
905,193. Automatic control systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 25, 1959 [Feb. 25, 1958], No. 6088/58. Class 38 (4). In a system for automatically controlling pH value of liquid flow, a valve controls the addition of a chemical agent, and a pH meter, having its sensing electrode in the flow downstream of the point where the chemical agent is added, moves a member in one sense or the other to influence light rays and thereby cause the valve to move towards a closed or open position according to the sense of pH deviation. In Fig. 2 a pointer SA of an instrument measuring the pH value of a flowing liquid (not shown), by means of an electrode immersed in the liquid, carries a shutter SH which blocks light from a lamp L when the liquid has a desired pH value. With rise or fall in the pH value, pointer SA moves one way or the other about pivot P to allow a photo-cell C 1 or C 2 to become illuminated via a mirror M 1 or M 2 so that one or other of two electric motors (not shown) is started to correct the pH value by opening or closing a valve controlling the supply of acid or alkali upstream of the electrode. Operation of the motors during correction is made intermittent by a continuouslyoperating time switch (not shown). Use of a reversible electric motor instead of two motors is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB608858A GB905193A (en) | 1958-02-25 | 1958-02-25 | Improvements in and relating to means for controlling hydrogen ion concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB608858A GB905193A (en) | 1958-02-25 | 1958-02-25 | Improvements in and relating to means for controlling hydrogen ion concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB905193A true GB905193A (en) | 1962-09-05 |
Family
ID=9808158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB608858A Expired GB905193A (en) | 1958-02-25 | 1958-02-25 | Improvements in and relating to means for controlling hydrogen ion concentration |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB905193A (en) |
-
1958
- 1958-02-25 GB GB608858A patent/GB905193A/en not_active Expired
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