GB981887A - Improvements in and relating to electrical measuring indicating or control apparatus - Google Patents
Improvements in and relating to electrical measuring indicating or control apparatusInfo
- Publication number
- GB981887A GB981887A GB10664/61A GB1066461A GB981887A GB 981887 A GB981887 A GB 981887A GB 10664/61 A GB10664/61 A GB 10664/61A GB 1066461 A GB1066461 A GB 1066461A GB 981887 A GB981887 A GB 981887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thermistor
- resistor
- current
- photo
- relating
- 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
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 230000002277 temperature effect Effects 0.000 abstract 1
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
- G05D23/27—Control of temperature characterised by the use of electric means with sensing element responsive to radiation
-
- 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
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Abstract
981,887. Automatic temperature control systems. FOSTER INSTRUMENT CO. Ltd. Jan. 12,1962 [March 23,1961], No. 10664/61. Heading G3R. [Also in Division H3] An electrical control system responsive to an electrical input signal dependent on say temperature, comprises a moving coil system 2 motivating an obstruction 4 between a light source 5 and a silicon photo-cell 7 which is connected across a diagonal of a bridge circuit comprising a thermistor 8, a resistor 9 and a transistor 10, the current at balance actuating a relay coil 11, 14 controlling the variable quantity, and energizing a heater 15 which acts to reducethe transistor base drive and hence the relay current to heat the release valve. In a modification a thermistor is substituted for the resistor 9 to reduce ambient temperature effects. Thermistor 9 may have an additional resistor in series so that the combination will give constant voltage at the photo-cell connection point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB10664/61A GB981887A (en) | 1961-03-23 | 1961-03-23 | Improvements in and relating to electrical measuring indicating or control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB10664/61A GB981887A (en) | 1961-03-23 | 1961-03-23 | Improvements in and relating to electrical measuring indicating or control apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB981887A true GB981887A (en) | 1965-01-27 |
Family
ID=9972020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10664/61A Expired GB981887A (en) | 1961-03-23 | 1961-03-23 | Improvements in and relating to electrical measuring indicating or control apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB981887A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2386906C1 (en) * | 2005-06-03 | 2010-04-20 | Данфосс А/С | Regulating nozzle for valves of heat exchangers, namely thermoregulating nozzle for radiator valves |
-
1961
- 1961-03-23 GB GB10664/61A patent/GB981887A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2386906C1 (en) * | 2005-06-03 | 2010-04-20 | Данфосс А/С | Regulating nozzle for valves of heat exchangers, namely thermoregulating nozzle for radiator valves |
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