GB323022A - Improvements in and relating to sensitive electrical regulating, indicating or recording devices - Google Patents
Improvements in and relating to sensitive electrical regulating, indicating or recording devicesInfo
- Publication number
- GB323022A GB323022A GB25733/28A GB2573328A GB323022A GB 323022 A GB323022 A GB 323022A GB 25733/28 A GB25733/28 A GB 25733/28A GB 2573328 A GB2573328 A GB 2573328A GB 323022 A GB323022 A GB 323022A
- Authority
- GB
- United Kingdom
- Prior art keywords
- millivoltmeter
- resistances
- wheatstone bridge
- relating
- indicating
- 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
- G05D23/22—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 being a thermocouple
-
- 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)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
323,022. Foster, C. E., and Oughton, H. C. Sept. 7, 1928. Thermometers. - The moving coil of a millivoltmeter connected to a thermocouple a, for use as a pyrometer or to a current carrying shunt, is adapted upon breakage or short circuit of the instrument leads 2, 3 to swing to one or other of its extreme positions, in which the instrument needle operates relay contacts for an alarm or controlling device. The operating, E.M.F. is supplied by a battery 9 connected, with ballasting resistances rl - - r<4>, as a normally balanced Wheatstone bridge network across the moving coil 8. Modified arrangements are described whereby a millivoltmeter with differential coil windings may be used or a suppressed zero effect produced by unbalancing the Wheatstone bridge. The variation in cold junction temperature in the electric pyrometer arrangement can be compensated for by using platinum or nickel wire in the resistances r', r<4>.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB25733/28A GB323022A (en) | 1928-09-07 | 1928-09-07 | Improvements in and relating to sensitive electrical regulating, indicating or recording devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB25733/28A GB323022A (en) | 1928-09-07 | 1928-09-07 | Improvements in and relating to sensitive electrical regulating, indicating or recording devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB323022A true GB323022A (en) | 1929-12-09 |
Family
ID=10232393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25733/28A Expired GB323022A (en) | 1928-09-07 | 1928-09-07 | Improvements in and relating to sensitive electrical regulating, indicating or recording devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB323022A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2793813A (en) * | 1953-07-23 | 1957-05-28 | Honeywell Regulator Co | Measuring and controlling apparatus |
CN113358995A (en) * | 2021-05-24 | 2021-09-07 | 丽水方德智驱应用技术研究院有限公司 | Online junction temperature estimation method for power component |
-
1928
- 1928-09-07 GB GB25733/28A patent/GB323022A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2793813A (en) * | 1953-07-23 | 1957-05-28 | Honeywell Regulator Co | Measuring and controlling apparatus |
CN113358995A (en) * | 2021-05-24 | 2021-09-07 | 丽水方德智驱应用技术研究院有限公司 | Online junction temperature estimation method for power component |
CN113358995B (en) * | 2021-05-24 | 2022-05-17 | 丽水方德智驱应用技术研究院有限公司 | Online junction temperature estimation method for power component |
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