GB1132692A - An electrical process control system - Google Patents
An electrical process control systemInfo
- Publication number
- GB1132692A GB1132692A GB44421/64A GB4442164A GB1132692A GB 1132692 A GB1132692 A GB 1132692A GB 44421/64 A GB44421/64 A GB 44421/64A GB 4442164 A GB4442164 A GB 4442164A GB 1132692 A GB1132692 A GB 1132692A
- Authority
- GB
- United Kingdom
- Prior art keywords
- feedback
- thyristor
- capacitor
- motor
- voltage
- 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
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
- G05D23/1921—Control of temperature characterised by the use of electric means characterised by the type of controller using a thermal motor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
1,132,692. Automatic temperature control systems. F.L.F. STEGHART. Jan.28, 1966 [Oct.30, 1964; Feb.18, 1965], Nos.44421/64 and 7121/65. Heading G3R. An automatic temperature control system having a delayed proportional feedback comprises a temperature sensitive resistor 30 in a D.C. bridge circuit controlling through valves 31, 32 the voltage across a capacitor 33. When a diode 34 breaks down a thyristor 35 is fired energizing a thermal expansion motor 37 to control the heating fluid. The feedback circuit includes a current transformer 39 which charges a capacitor 42 the voltage across which opposes the bridge output hence the thyristor is cyclically switched off. The load 37 may be in series with the thyristor. A resistor 41 and capacitor 43 may introduce a time delay. In another arrangement Fig. 6 (not shown) positional feedback may be provided by a potentiometer linked to the motor 37. In a further arrangement the motor 37 is switched by relay contacts and other contacts simultaneously supply the feedback. A number of other arrangements are described in the Specification employing feedback proportional to position or other parameters.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB44421/64A GB1132692A (en) | 1964-10-30 | 1964-10-30 | An electrical process control system |
| DEST24578A DE1292417B (en) | 1964-10-30 | 1965-10-29 | Electrical process control device |
| CH1493965A CH463602A (en) | 1964-10-30 | 1965-10-29 | Electric control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB44421/64A GB1132692A (en) | 1964-10-30 | 1964-10-30 | An electrical process control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1132692A true GB1132692A (en) | 1968-11-06 |
Family
ID=10433217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB44421/64A Expired GB1132692A (en) | 1964-10-30 | 1964-10-30 | An electrical process control system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1132692A (en) |
-
1964
- 1964-10-30 GB GB44421/64A patent/GB1132692A/en not_active Expired
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