GB187177A - Improvements relating to temperature regulating devices - Google Patents
Improvements relating to temperature regulating devicesInfo
- Publication number
- GB187177A GB187177A GB5237/22A GB523722A GB187177A GB 187177 A GB187177 A GB 187177A GB 5237/22 A GB5237/22 A GB 5237/22A GB 523722 A GB523722 A GB 523722A GB 187177 A GB187177 A GB 187177A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- coil
- switch
- current
- electrolyte
- 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
- G05D23/1906—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)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
187,177. Metropolitan-Vickers Electrical Co., Ltd., (Westinghouse Electric d Manufacturing Co.). Feb. 22, 1922. Cut-out arrangements.-The supply of current to an electric heater is controlled by means of a variable-resistance element 15 such as an electrolyte having a negative temperature-coefficient which is subject to the temperature of the heating-element and is included in circuit with a source of electromotive force 14 and the actuating coil 13 of a switch so that when the temperature of the electrolyte reaches a predetermined maximum the current through the, coil 13 is sufficiently strong to actuate the switch and thereby cut off or diminish the supply of heat, the switch automatically returning to its original position as the temperature falls again. In the arrangement shown, the electric heater 11 is heated by an alternating current from the mains 10 and a transformer 14 is connected across the mains supplies the current to the coil 13 and variable-resistance element 15, the coil 13 being arranged to open a switch 12 in the main circuit at the predetermined temperature. The resistance element 15 consists of a glass or quartz container 16, preferably containing an electrolyte such as silver chloride or potassium nitrata in which are immersed electrodes 17, but the container itself may form one electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5237/22A GB187177A (en) | 1922-02-22 | 1922-02-22 | Improvements relating to temperature regulating devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5237/22A GB187177A (en) | 1922-02-22 | 1922-02-22 | Improvements relating to temperature regulating devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB187177A true GB187177A (en) | 1922-10-19 |
Family
ID=9792278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5237/22A Expired GB187177A (en) | 1922-02-22 | 1922-02-22 | Improvements relating to temperature regulating devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB187177A (en) |
-
1922
- 1922-02-22 GB GB5237/22A patent/GB187177A/en not_active Expired
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