GB955707A - An instrument for the control of temperature - Google Patents
An instrument for the control of temperatureInfo
- Publication number
- GB955707A GB955707A GB19702/60A GB1970260A GB955707A GB 955707 A GB955707 A GB 955707A GB 19702/60 A GB19702/60 A GB 19702/60A GB 1970260 A GB1970260 A GB 1970260A GB 955707 A GB955707 A GB 955707A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- temperature
- pointer
- stage
- slider
- 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
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000009795 derivation Methods 0.000 abstract 1
- 230000001105 regulatory 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
- G05D23/20—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
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
- G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
955,707. Automatic control of temperatures. TYER & CO. Ltd. May 29, 1961 [June 3, 1960], No. 19702/60. Heading G3R. An instrument for controlling and indicating a desired temperature comprises a centre-zero millivoltmeter movable with the slider of a resistor forming one arm of a temperature-measuring Wheatstone bridge. As shown, Fig. 5, a bridge comprises a desired temperature setting resistor 4A and a temperature responsive resistor 14. Out-ofbalance of the bridge is indicated by a centre-zero millivoltmeter 5A and the out-of-balance signal is fed through a transistorised amplifier comprising stages 9-12, to actuate a relay 13 energizing a temperature regulating means, not shown. Positive feedback is applied from stage 12 to stage 9 from a potentiometer R2, and the input of stage 9 is balanced by a potentiometer R1 having a slider connected to the negative supply through a resistor R6. The relay 13 is slugged by a capacitor C3. The meter 5A and the resistor 4A are mounted concentrically in a case 1A, Fig. 2, and a slider 4 of the resistor 4A is mounted on a pointer 3G for setting the desired temperature on a scale 3. The meter 5A is mounted on the pointer 3G and has a pointer 5B to indicate derivation of the measured temperature from the desired value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19702/60A GB955707A (en) | 1960-06-03 | 1960-06-03 | An instrument for the control of temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19702/60A GB955707A (en) | 1960-06-03 | 1960-06-03 | An instrument for the control of temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB955707A true GB955707A (en) | 1964-04-15 |
Family
ID=10133779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19702/60A Expired GB955707A (en) | 1960-06-03 | 1960-06-03 | An instrument for the control of temperature |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB955707A (en) |
-
1960
- 1960-06-03 GB GB19702/60A patent/GB955707A/en not_active Expired
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