GB635235A - Improvements relating to high frequency measuring apparatus - Google Patents
Improvements relating to high frequency measuring apparatusInfo
- Publication number
- GB635235A GB635235A GB373647A GB373647A GB635235A GB 635235 A GB635235 A GB 635235A GB 373647 A GB373647 A GB 373647A GB 373647 A GB373647 A GB 373647A GB 635235 A GB635235 A GB 635235A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thermistor
- bridge
- output
- power
- mixer
- 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
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
635,235. Power meters. MILLING, M. C. CROWLEY-, and METROPOLITAN VICKERS ELECTRICAL CO., Ltd. Feb. 7, 1947, No. 3736. [Class 37] A device for measuring H.F. power consists of a low-frequency A.C. bridge circuit ABCD, wherein three arms are resistances and the fourth AC is a thermistor type resistance T. The output voltage is amplified and applied to a mixer M, the output of which is rectified and heats the thermistor. The mixer is so biassed by the source supplying the bridge that its output with zero input brings the thermistor to the condition in which the bridge is balanced. When H.F. power also is fed to the thermistor via terminals R.F., the temperature of the thermistor rises and the resulting unbalance voltage reduces the output of the mixer so that the temperature of the thermistor only changes slightly and the bridge is only slightly unbalanced. The change in current from the rectifier as shown on the meter G indicates the change in the heating of the thermistor due to the applied H.F., and by suitable calibration, the meter G can provide a direct indication of the applied H.F. power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB373647A GB635235A (en) | 1947-02-07 | 1947-02-07 | Improvements relating to high frequency measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB373647A GB635235A (en) | 1947-02-07 | 1947-02-07 | Improvements relating to high frequency measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB635235A true GB635235A (en) | 1950-04-05 |
Family
ID=9763982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB373647A Expired GB635235A (en) | 1947-02-07 | 1947-02-07 | Improvements relating to high frequency measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB635235A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1388737A1 (en) * | 2002-08-09 | 2004-02-11 | Landis+Gyr AG | Housing for a meter |
-
1947
- 1947-02-07 GB GB373647A patent/GB635235A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1388737A1 (en) * | 2002-08-09 | 2004-02-11 | Landis+Gyr AG | Housing for a meter |
| WO2004021020A1 (en) * | 2002-08-09 | 2004-03-11 | Landis+Gyr Ag | Housing for a meter |
| CN100380130C (en) * | 2002-08-09 | 2008-04-09 | 兰迪斯+盖尔股份有限公司 | Housing for a meter |
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